text:
Le bruit de scintillation est un bruit électronique toujours présent dans les composants actifs et dans certains composants passifs. Il est également appelé bruit de scintillement, bruit de papillotement, bruit de basse fréquence ou bruit en excès. Il fait partie des bruits roses ayant une courbe de puissance en 1/f. Bruit de flicker est un anglicisme souvent utilisé pour nommer ce bruit.

Source
Ses origines sont variées : il peut être dû à des impuretés dans le matériau pour un transistor, par exemple, qui libèrent aléatoirement des porteurs de charge, ou bien à des recombinaisons électron-trou parasites, etc.. De manière générale, une superposition de nombreux phénomènes similaires avec des fréquences caractéristiques différentes, comme la présence d'un continuum de niveaux pièges dans la bande interdite (« gap ») d'un semi-conducteur génèrent ce type de bruit.

Calcul
L'appellation bruit en 1/f est donc très générique et s'utilise surtout par opposition au bruit blanc. Ce nom est d'ailleurs trompeur dans la mesure où il s'agît d'un bruit décroissant en réalité en  où  est la fréquence et  est un coefficient non entier, entre 0,8 et 1,3, déterminé empiriquement.

Électronique
La fréquence au-dessus de laquelle le bruit blanc dépasse en intensité le bruit en 1/f est dénommée fréquence de coude du bruit et est une caractéristique importante des composants électroniques. Cette fréquence est beaucoup plus basse pour les transistors à effet de champ à jonction (JFET) que les transistors à effet de champ à grille métal-oxyde (MOSFET). De plus, dans cette dernière catégorie, celle des PMOS est inférieure à celle des NMOS.

Enfin, pour des raisons statistiques (leur faible surface), les petits transistors sont beaucoup plus sensibles au bruit en 1/f que les gros.

Notes et références

Annexes

Articles connexes
 Bruit d'avalanche
 Bruit en créneaux
 Bruit thermique
 Bruit grenaille

Lien externe
   Texas Instruments application report slva043b:

Flicker

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Common ragweed (Ambrosia artemisiifolia) is a native summer annual that infests crop fields in all tillage systems and fertility levels, but higher densitites are more often associated with reduced tillage and lower fertility.
Germination occurs in the spring and requires light and a chilling period to break dormancy. Seeds need to be near the soil surface with increasing air temperatures for germination.
Seed production veries from 32,000 to 62,000 seeds per plant.
Flower initiation in common ragweed is sensitive to day lenght. Plants will start flowering as day lengths begin to shorten right after the summer solstice, regardless of plant height.
Soybean yield can be reduced by up to 10 percent by common ragweed densities of four plants per 30 feet of row.
It has been documented that root- and stem-boring insects can reduce glyphosate efficacy on giant ragweed when applications are delayed. This problem may occur in common ragweed, as well, if postemergent applicaitons are not timely.
Common ragweed with evolved resistance to Group 2 herbicides (ALS-inhibitor) was identified in Delaware, Illinois, Indiana, Michigan, Minnesota and Ohio as early as the mid-1990s.
Resistance to Group 14 herbicides (PPO inhibitors) in common ragweed is confirmed in Delaware and Ohio.
Resistance to Group 9 (glyphosate) herbicides occurs over a larger geography, including Arkansas, Indiana, Kansas, Kentucky, Minnesota, Missouri, North Carolina, North Dakota, Ohio, Pennsylvania and South Dakota.
In addition, common ragweed populations with resistance to multiple herbicides (i.e., multiple sites of action) have been identified in Delaware, Minnesota and Ohio.
Single applications of any single pre- or postemergent herbicide will not provide season-long control of weeds, especially competitive broadleaf weeds, like common ragweed. Successful common ragweed management programs must include both pre- and postemergent applications, with at least two effective herbicide sites of action.
Start clean. Get the season off to a great start by controlling existing weeds with preplant tillage or herbicides, and be sure to include herbicides with residual activity. Regardless of resistance levels, remember to include two or more sites of aciton in each application.
For glyphosate-resistant populations, use a tank mix of at least two sites of action for preplant and pre-emergent applications, including herbicides with residual activity.
For ALS-resistant populations, consider rotation to corn or wheat and delay planting to soybean. The preplant and pre-emergent strategies are similar to the glyphosate resistant program except that the pre-emergent application should contain either a Group 14 (PPO-inhibitor) or Group 5 (metribuzin) herbicide.
Stay clean. The most effective way to achieve full-season weed control and address herbicide-resistance concerns is to start with a pre-emergent application and follow with at least one effective postemergent-applied herbicide. The POST application should occur before the weeds exceed four to six inches in height, depending on herbicide and growing conditions. After the first postemergent application, the fields need to be scouted to determine if there are newly emerged seedlings and to verify the application's efficacy.
Flexstar® (Group 14) at 1.0 to 1.5 pints/A. – be sure to check the label for rate allowed in your area.
Cobra® or Phoenix™ (Group 14) at 12.5 oz./A.
Cobra® or Phoenix™ (Group 14) at 12.5 oz./A., or Flexstar (Group 14) at 1.0 to 1.5 pints/A. (check label to see if 1.5 pt./A. rate allowed in your area). Reduced rates of these herbicides will result in less control of ALS-resistant plants.
In all cases listed above, herbicide combinations may need to be considered to satisfy the need of using multiple effective sites of action (e.g., Liberty® + Cobra® or Flexstar® as a postemergent application) and/or additional herbicides may be needed to control other weeds in the mix. For example, many options listed above don't control grass weeds. Please read and follow directions to avoid herbicide antagonism and/or crop injury.
Scout. Two weeks after the first postemergent application, the fields sholuld be checked to see if a second application is necessary.


text:
ShiPu Wang 王士圃
The Coats Endowed Chair in the Arts and Professor of Art History & Visual Culture
Chiura Obata: An American Modern
Prof. Wang Was a Terra Foundation Senior Fellow at the Smithsonian American Art Museum
Prof. Wang received the 2014-15 Terra Foundation in American Art Senior Fellowship at the Smithsonian American Art Museum in Fall 2014. (http://newsdesk.si.edu/releases/smithsonian-american-art-museum-announces-2014-2015-fellowship-appointments).
Global Arts, Media, and Writing Studies
School of Social Sciences, Humanities and Arts
5200 North Lake Road
swang7@ucmerced.edu
Prof. Wang Featured in the Smithsonian Institution's Podcast "Sidedoor" about Chiura Obata
Latest Publication: "Wyeth in Taiwan"
Prof. Wang Appointed to the Smithsonian National Portrait Gallery's Board
Prof. Wang Delivered the Opening Lecture for Chiura Obata: American Modern
The Chiura Obata Retrospective, Curated by Prof. Wang, Concludes Its International Tour at the Smithsonian American Art Museum
Prof. Wang's THE OTHER AMERICAN MODERNS Won the 2018 Georgia O'Keeffe Museum Book Prize
@curatingobata

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Bamboo wind chimes can help transform your home into one that is not just bare or quite into one which looks more decorated and where pleasing sounds can make people relax more. In fact, more than three thousand years have passed since the first wind chimes were used by ancient Chinese, but today people can still enjoy the same calmness that the ancient Chinese enjoyed in those early days. Wind chimes produce very soothing sounds and they should act as a reminder that you need to take time off from busy schedules to relax as well as enjoy the musical tones that some wind chimes produce so well.
Bamboo wind chimes in fact, produce more than soothing sounds because the wood that they are made from is also known to provide its own benefits. As a matter of fact, proper use of a bamboo wind chime helps in creating more wealth, improves health and generally makes people feel better because of many healing powers associated with bamboo.
You can enhance your wealth by choosing a bamboo wind chime that has eight hollowed out tubes that are connected with one of those enchanting Chinese trading ships which too should be made from bamboo. To get maximum effect it requires that the ship as well as the tubes is positioned in a manner to produce the desired effect. It is well known that between six and eight bamboo tubes will create more positive energy and will improve your luck as well; five tubes on the other hand will help save you from bad luck.
You can place your bamboo wind chime wherever it suits you though the best place to hang it is in a corner where there is a lot of breeze which in turn will result in more soothing sounds. If you are using the bamboo wind chime for Feng Shui purposes it may then be necessary to position the chime to face a certain star, especially one that represents fire.
The wood element of bamboo wind chimes will, when facing the star (fire element); ensure that good luck enters into your home. However, makes sure not to try the same positioning with metal chimes as that, it is believed, will only cause bad luck to affect you.
If you wish to install a bamboo wind chime in your front yard then it may be necessary to choose large bamboo wind chimes as they will provide sufficient sounds and also look great. They do not cost too much but will certainly provide you with relaxation whenever you step out of your home.


text:
Adsorption of methylene blue from aqueous solutions by pyrolusite ore
Methylene Blue- from Aqueous Solution by Adsorption on Fly Ash
Removal of Methylene Blue from Aqueous Solutions by Waste Paper
adsorption of methylene blue from an aqueous ... - Science Direct
Adsorption of Methylene Blue from Aqueous Solution using Steam ...
Oct 8, 2014 - Solution Using Steam-Activated Carbon. Produced from ... Email: *[email protected] Received 21 .... where, qe = amount of dye adsorbed per unit mass of adsorbent (mg/g), Co = initial dye concentration (mg/L), Ce.
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Adsorption Studies of Methylene Blue Dye from Aqueous Solution ...
32-41 . Removal of methylene blue from aqueous solutions using ...
Removal of methylene blue from aqueous solutions using modified clay
Fast Removal of Methylene Blue from Aqueous
Removal of Methylene Blue from Aqueous Solution
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ADSORPTION FROM AQUEOUS SOLUTIONS - Sid
Removal of Methylene Blue from Aqueous Solution by ... - CiteSeerX
from aqueous solutions Adsorption kinetics of ... - ScienceDirect.com
Adsorption of Cadmium from Aqueous Solutions onto
Adsorption Studies of Eu3+ from Aqueous Solutions by Poly(N ...
Adsorption of Nickel Ions from Aqueous Solutions by Nano Alumina ...
Adsorption of phenol from aqueous solutions by Luffa cylindrica ... - Core
Japan in solid phase was performed before and after use of LC to get qualitative and ...... Shen, S.F., Smith, K.H., Cook, S., Kentish, S.E., Perera, J.M., Bowser,.
Apr 21, 2014 - AFH. Figure.3. Pseudo second-order kinetics plots of adsorption kinetics of Eu3+ ions on AFH. Figure.4. Effect of concentration on adsorption.
The waste solutions containing organic and/or inorganic ... Received: 09 August 2017; revised: 03 September 2017; accepted: 11 September 2017. ABSTRACT.
Mongolian Journal of Chemistry
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11
https://doi.org/10.5564/mjc.v18i44.880
www.mongoliajol.info/index.php/MJC
Adsorption of methylene blue from aqueous solutions by pyrolusite ore N.Demirkıran*, G.D.Turhan Özdemir, M.Saraç, M.Dardağan Department of Chemical Engineering, Faculty of Engineering, Inonu University, Malatya, 44280, Turkey. *Corresponding author: [email protected] Received: 09 August 2017; revised: 03 September 2017; accepted: 11 September 2017
In this study, the adsorption of methylene blue dye was examined by using pyrolusite ore as a low-cost alternative adsorbent source. Pyrolusite, which contains mainly MnO2, is a manganese ore. The effects of the initial concentration of dye, contact time, initial pH of solution, adsorbent dosage, stirring speed of solution, and average particle size of adsorbent on the adsorption of methylene blue were studied. It was found that the percentage of the adsorbed dye increased with increasing the amount of pyrolusite. While the initial dye concentration, initial pH, contact time, stirring speed, particle size, and adsorbent dosage were 25 ppm, 6, 90 min, 250 rpm, 63 µm, and 12 g/l, respectively, the efficiency of dye adsorption on pyrolusite ore was 99%. The isotherm and kinetic studies relating to this adsorption process were also made. It was found that the equilibrium data followed the Langmuir isotherm model while the kinetic of process could be described by the pseudo-second order kinetic model. Keywords: Adsorption, low cost adsorbent, methylene blue, pyrolusite ore
INTRODUCTION The waste solutions containing organic and/or inorganic contaminants after various industrial processing come into existence. These effluents are frequently discharged directly to environment. Discharged wastewaters can induce serious damages on the environment and human health due to their hazardous ingredients. Therefore, from both environmental and economical perspectives, organic and inorganic pollutions in industrial wastewater must be removed or reduced to the permissible levels before they are discharged to the environment by using appropriate separation methods [1-3]. Synthetic organic dyestuffs are widely used in order to color the products manufactured in textile, paper, rubber, plastics, leather, cosmetics, food, and pharmaceutical industries. In these industries, substantial amounts of water are used during process. Correspondingly, the wastewater emergent from these processes contain dyes at various ratios. The effluents containing dyes are mostly released directly to water source without applying any purification procedure. These kinds of wastewaters can cause to the pollution of water and soil in the surrounding of the plant due to their toxic, nondegradable, and carcinogenic characters. Consequently, human beings, and flora and fauna are negatively affected from this environmental pollution [4-7]. The methods applied for removal of dyes from wastewater adsorption [3, 12-15], membrane filtration [16, 17], and microbial degradation [18, 19] have been applied for treating the effluents containing dyes.
Among the methods mentioned above, adsorption process is one of the most widely used methods for elimination of dye from industrial waste solutions. Activated carbon obtained from various sources has been often used as adsorbent for the removal of dyes due to its high adsorption capacity [3, 12, 14, 15]. However, activated carbon is not economically feasible for large scale applications because of its high cost of production and regeneration. Hence, the use of the adsorbents having low cost can be advantageous for elimination of dyes from wastewater by adsorption process. The materials that have been used for this purpose include both natural materials and wastes, and byproducts generated from many industries. These materials are widely known as low-cost adsorbents. Among these alternative adsorbent sources, natural materials (ores or minerals) can be used for the removal of various species from wastewaters owing to its low-cost and abundance [2, 4, 20]. Methylene blue is one of the colored organic compounds, and it is mainly used for dying cotton, wool, and silk [2, 5]. For removal of methylene blue from wastewaters generated various industrial plants, active carbon manufactured different sources [2-4, 12, 21], saw dust [22], natural ores and their wastes [23-25], different clays [26, 27], biomass [5, 28], and agricultural solid wastes [29, 30] have been used as low-cost adsorbents. Manganese is the twelfth most abundant element in the earth's crust. The most common mineral is pyrolusite, which is mainly MnO2. Low-grade pyrolusite ore in its natural state has little commercial value. For this reason, it is usually treated and converted into the metal or
© The Author(s). 2017 Open access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 other more valuable manganese compounds. This ore is essentially used for the production of manganese sulfate. This ore contains iron oxide, silica, and clay minerals in addition to manganese oxide depending on the ore source. These oxides and clay minerals existed in ore matrix have adsorbent feature, and they exhibit high potential for adsorption of various species. Hence, pyrolusite ore can use as a low-cost adsorbent in the adsorption process because of its abundant in the natural state, ease of availability, and direct use without pretreatment [31, 32]. The adsorptions of various inorganic and organic species using pyrolusite and manganese nodules have been examined by different researchers. Manganese ores supplied from different locations, manganese nodules, and leach residues of manganese ores have been utilized for elimination of various inorganic and organic species from aqueous solutions by adsorption process [23, 33-39]. The aim of this study is to investigate the use of pyrolusite as an alternative adsorbent material for the removal of methylene blue dye from aqueous solutions. The effects of the experimental parameters, including initial solution concentration and contact time, adsorbent dosage, initial solution pH, stirring speed, and particle size on the adsorption of methylene blue dye from aqueous solutions have been studied.
composed of pyrolusite (MnO2), phyllosilicate, quartz, and calcite. All the chemicals (methylene blue, sodium hydroxide, sulfuric acid) used in the experiments were analytical grade and were employed as received without further purification. The stock solution was prepared by dissolving the required amount of methylene blue dye in distilled water. The test solutions used in the experiments were prepared by diluting stock solution to the desired concentrations. The batch adsorption tests were performed in 100 ml conical flasks placed on a magnetic stirrer. In each adsorption test, after a volume of 50 ml dye solution at a definite concentration was placed into the glass flask, a given amount of pyrolusite was added to the dye solution. The initial pH of test solutions was adjusted using diluted H2SO4 or NaOH. The pH values of the sample solutions were determined using WTW pMx2000 pH meter. All adsorption experiments were carried out at laboratory temperature. The adsorption process was performed for various contact times. The concentration of dye in the aqueous solution after adsorption tests was analyzed using UV spectrophotometer (Shimadzu UV-1800). The absorbances of methylene blue solutions having different concentrations were measured at various wavelengths, and maximum absorbance was determined at wavelength of 662 nm. Thus, the absorbance of residual concentration of methylene blue after adsorption process was measured at wavelength of 662 nm. The amount of dye adsorbed by pyrolusite ore was calculated from difference between the dye concentration before and after adsorption. The percentage of dye removal and the amount of dye adsorbed per unit mass of ore were evaluated by using the following equations, respectively.
EXPERIMENTAL The pyrolusite ore sample used in this experimental study was provided from Konya, Turkey. The ore sample was crushed, ground, and then sieved using standard test sieves to obtain different particle size fractions. The original ore sample was analyzed, and it was determined that the mineral contained 57.66% MnO2, 10.00% CaO, 8.04% Fe2O3, 7.08% SiO2, 0.93% Al2O3, 0.44% MgO, 15.85% loss of ignition (at 800°C). The mineralogical composition of the pyrolusite ore was determined by X-ray diffraction analysis using a Rigaku RadB-DMAX II model X-ray diffractometer. The X-ray diffraction pattern of the ore sample is shown in Figure 1.
(1) (2) where: Ci and Ct - initial and residual concentration at t time (mg/l), Ce - equilibrium concentration (mg/l) qe - amount of adsorbed dye per unit mass of adsorbent at equilibrium (mg/g), V - initial volume of the adsorption solution (l) m -mass of adsorbent (g). RESULTS AND DISCUSSION Determination of optimal adsorbent dosage: To determine the optimum adsorbent dosage for different concentrations of methylene blue, the experiments were performed at five different pyrolusite dosages in the range of 0.2-0.6 g while the initial concentrations of the solution containing methylene blue dye were changed from 10 to 150 ppm. While practicing these experiments, the values of the contact time, total volume of dye solution, particle size of pyrolusite, and agitation speed of solution were kept constant at 60 min, 50 ml, 89.5 µm,
Fig. 1. X ray diffraction pattern of the ore sample used in the study
This figure indicates that the ore sample used is mainly
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 and 250 rpm, respectively. In these tests, the initial pH of dye solutions was 6. Figure 2 shows the effect of the adsorbent dosage on the adsorption of methylene blue at different initial concentrations. As can be seen in Figure 2, the percentage of the adsorbed dye decreased for the same amount of pyrolusite as the initial concentration increased. In other words, the amount of the adsorbed dye increased for the same initial concentration of methylene blue when the amount of pyrolusite increased. For all initial dye concentrations, the maximum dye removal occurred at 0.6 g adsorbent dosage. After 60 min adsorption time, the extent of removal of dye from the solution at the amount of adsorbent dosage of 0.6 g was 94%, 91%, 88%, 71%, 59%, and 35%, at 10, 25, 50, 75, 100, and 150 ppm of concentration, respectively.
Fig.3. Effect of average particle size on dye adsorption
these tests, the initial concentration of dye solution, total volume, stirring speed, particle size, contact time, and adsorbent dosage were fixed at 50 ppm, 50 ml, 250 rpm, 63 µm, 60 min, and 0.6 g, respectively. The results obtained from these experiments were given in Figure 4. It can be seen from this figure that the extent of methylene blue adsorption increased with increasing the initial pH. Methylene blue is a cationic dye. Therefore, adsorption of methylene blue increases because electrostatic interaction can improve between absorbent and dye molecules with increasing pH of solution.
Fig.2. Effect of adsorbent dosage on different dye concentrations
An increase the adsorbent dosage for a given initial dye concentration or a decrease the adsorbate concentration for a defined adsorbent dosage can provide a greater surface area or adsorption sites between adsorbent and dye molecules. Thus, the extent of methylene blue adsorption increases. Effect of particle size of pyrolusite on adsorption: The adsorption extent is proportional to the surface area of the solid adsorbent because the adsorption is a surface event. Therefore, more finely divided solid can provide more surface area per unit weight of a solid adsorbent. Hence, the effect of particle size of pyrolusite on adsorption process was studied using the average size fractions of 115, 89.5, 68.5, and 63 µm. In these tests, the values of the initial concentration of dye solution, total volume, initial pH, adsorbent dosage, contact time, and stirring speed were chosen to be 50 ppm, 50 ml, 6, 0.6 g, 60 min, and 250 rpm, respectively. The results obtained from these experiments are shown in Figure 3. As can be seen Figure 3, the percentage of the adsorbed methylene blue increased with a decrease in particle size of pyrolusite. Effect of initial pH of solution on adsorption: The effect of the initial pH of dye solution on adsorption process was investigated at the pH of 3, 4, 5, and 6. In
Fig.4. Effect of initial pH of solution on dye adsorption
Effect of stirring speed on adsorption: Experiments were carried out at stirring speeds of 150, 200, 250, and 300 rpm to observe the effect of the stirring speed on adsorption of methylene blue by pyrolusite ore. In these experiments, the initial concentration of dye solution, total volume, particle size, contact time, adsorbent dosage, and initial pH of solution were selected to be 50 ppm, 50 ml, 63 µm, 60 min, 0.6 g, and 6, respectively. Figure 5 shows the experimental results concerning the effect of stirring speed on adsorption of methylene blue. These results show that the amount of adsorbed dye increases with increasing stirring speed. Effect of contact time on adsorption: The effect of contact time on adsorption process was examined in the range 0-180 min for different concentrations (25, 50, 75, and 100 ppm) of methylene
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 blue. In these tests, the values of volume of sample solution, particle size, adsorbent dosage, and initial pH of solution were kept constant at 50 ml, 63 µm, 0.6 g, and 6, respectively.
The Freundlich model assumes that the adsorption occurs on the heterogeneous surface of the solid adsorbent. On the other hand, the Langmuir model supposes that the adsorption takes place on a homogeneous surface by monolayer sorption without interaction between adsorbed molecules [5, 14]. The linear forms of the Freundlich and Langmuir isotherm equations are given as follows: (for the Freundlich model) (3) (for the Langmuir model) (4) where:
qe - amount of adsorbate adsorbed per unit mass of adsorbent (mg/g), Ce - equilibrium concentration of the adsorbate (mg/l), Kf and n - are the Freundlich constants, including the adsorption capacity of the adsorbent (mg/g)(l/g)1/n and the adsorption intensity of adsorbent, respectively, qmax - monolayer adsorption capacity of the adsorbent (mg/g), KL - Langmuir constant (l/g).
Fig.5. Effect of stirring speed on dye adsorption
The results obtained from these experiments are given in Figure 6. It can be said from observed results that adsorption of methylene blue by pyrolusite is considerably fast in the first 20 min, and afterwards the adsorption of dye occurs gradually and reaches the equilibrium at about 60 min. It can be attributed to that there is considerable vacant surface sites for initial stage of process. In adsorption process, the equilibrium between the adsorbent and adsorbate is described by adsorption isotherms. The isotherms indicate the relation between the equilibrium concentration in the solid phase and in the aqueous phase for the adsorbate molecules when the process reaches an equilibrium state. Various adsorption isotherms have been developed to realize the interaction between the adsorbed molecules and the solid adsorbent. Among these isotherm models, the Freundlich and Langmuir models are the most widely applied isotherms for various adsorption processes [5, 14]. In this study, these two isotherm models were applied to analyze the adsorption data obtained from the experiments.
If the adsorption process obeys the Freundlich model, then the left side (logqe) of Eq. (3) versus logCe must be straight line. On the other hand, if the adsorption process obeys the Langmuir model, then the left side (Ce/qe) of Eq. (4) versus Ce must be straight line. When the experimental data obtained were plotted for the Freundlich model, straight line with low correlation coefficient was observed. Therefore, it can be said that the Freundlich model was inappropriate for this study. The adsorption data were then analyzed by using the Langmuir model. When the graph of the left side (Ce/ qe) of Eq. (4) versus Ce was drawn using the adsorption data, straight line with high correlation coefficient was found. Figure 7 represents the lot of Ce/qe versus Ce for
Fig. 6. Effect of initial concentration on dye adsorption for various contact times.
Fig. 7. The Langmuir isotherm plot for dye adsorption on pyrolusite ore.
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 various concentrations. In Eq. (4), the slope of the straight line give 1/qmax, and the intercepts give 1/qmaxKL. The values of qmax and KL parameters were calculated as 5.992, and 1.838, respectively. Therefore, it can be said that this adsorption process obeys the Langmuir model. The main properties of the Langmuir isotherm can be described by a dimensionless constant called equilibrium parameter or separation factor [21]. This is expressed as follows: (5) where:
RL - dimensionless constant called separation factor or equilibrium parameter KL - Langmuir constant (l/mg), C0 - initial concentration of solution (mg/l)
Fig. 8. The pseudo-second order kinetic plot for dye adsorption.
constructed for pseudo-second order kinetic model. The slopes of the straight lines in Figure 8 are 1/qe, and the intercepts are 1/k2qe2 for the pseudo-second order kinetic The values of the rate constants and correlation coefficients determined from Figure 8 are given in Table 1.
The values of RL indicate the nature of the adsorption process. A value of RL in the range from 0 to 1 indicates that the adsorption process between the adsorbent and adsorbate is favorable under the experimental conditions performed. This also indicates that the Langmuir isotherm is valid for adsorption process. The values of RL were found to be 0.0213, 0.0107, 0.0072, and 0.0054 at concentrations of 25, 50, 75 and 100 ppm, respectively. All the findings mentioned above show that the adsorption of methylene blue dye by pyrolusite ore follows the Langmuir isotherm model. The kinetic analysis of the adsorption processes is generally performed using pseudo-first order and pseudo-second order kinetic models. The equations describing these kinetics models are as follows:
Table 1. Kinetic parameters for the adsorption of methylene blue by pyrolusite ore.
(for the pseudo-first order kinetic)
Experimental qe (mg/g)
2.063 4.042 5.625 5.883
Pseudo-Second Order Kinetic Calculated qe (mg/g)
k2 (g/mg.min)
0.5463 0.3066 0.0403 0.0258
In addition, it can be seen in Table 1 that the qe values calculated from the intercepts of the straight lines in Figure 8 are good agreement with the qe values determined experimentally. The values of the correlation coefficients and the agreement between the qe values indicate that this adsorption process follows the pseudosecond order kinetics.
(6) (for the pseudo-second order kinetic)
Initial concentration (ppm)
CONCLUSIONS In this study, pyrolusite ore has been used as an alternative adsorbent for the removal of methylene blue dye from aqueous solutions. The effects of the initial concentration of solution, adsorbent dosage, particle size of adsorbent, stirring speed of solution, and initial pH of solution on dye adsorption were investigated. It was determined that the percentage of the adsorbed dye increased with increasing the pyrolusite dosage, stirring speed and initial pH, and with decreasing the average particle size of adsorbent and initial concentration of dye. Depending on the experimental conditions, it was observed that methylene blue was removed at high rates from aqueous solution. The isotherm and kinetic analysis showed that the equilibrium data followed the Langmuir isotherm model while the process kinetic obeyed the pseudo-second order kinetic
qe - amount of the adsorbed metal ion at equilibrium (mg/g) qt - amount of the adsorbed metal ion at t time (mg/g) k1 - rate constant for the first order adsorption (1/min) k2 - rate constant for the second order adsorption (g/mg.min) t - adsorption time (min)
To determine the kinetic model of the adsorption between pyrolusite ore and dye, the plot of ln(qe-qt) versus t for the pseudo-first order kinetic was drawn using the experimental data obtained . For the pseudo-second order kinetic, the plot of the left side of Eq. (7), t/qe, versus t was constructed. It was observed that the low correlation coefficients were obtained for the pseudofirst order kinetic model. Figure 8 shows the graph
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 model. According to findings obtained, it can be said that the methylene blue adsorption process by pyrolusite ore occurs by chemisorption. The present work suggests that the pyrolusite ore can be utilized as a relatively low-cost adsorbent for the removal of dye from wastewaters because the ore is available in its natural state without any need for a preliminary process.
13. Zhu M.X., Lee I., Wang H.H., Wang, Z. (2007) Removal of an anionic dye by adsorption/ precipitation processes using alkaline white mud. J. Hazard. Mater., 149, 735-741. 14. Tan I.A.W., Hameed B.H., Ahmad, A.L. (2007) Equilibrium and kinetics studies on basic dye adsorption by oil palm fibred activated carbon. Chem. Eng. J., 127, 111-119. 15. Demirbaş E. Kobya M., Sulak M.T. (2008) Adsorption kinetics of a basic dye from aqueous solutions onto apricot stone activated carbon. Bioresour. Technol., 99, 5368-5373. 16. Abid M.F., Zablouk M.A., Abid-Alameer, A.M. (2012) Experimental study of dye removal from industrial wastewater by membrane technologies of reverse osmosis and nanofiltration. Iranian J. Environ. Health Sci. Eng., 9, 17-25. 17. Zhua X., Zhenga Y., Chena Z., Chena Q., Gaoa B., Yu S. (2013) Removal of reactive dye from textile effluent through submerged filtration using hollow fiber composite nano filtration membrane. Desalination Water Treat., 51, 31-33. 18. Buthelezi S.P., Olaniran A.O., Pillay B. (2012) Textile dye removal from wastewater effluents using bioflocculants produced by indigenous bacterial isolates. Molecules, 17, 14260-14274. 19. Shah M.P., Patel K.A., Nair S.S., Darji A.M. (2013). Microbial degradation of textile dye (Remazol Black B) by Bacillus spp. ETL-2012. J. Bioremed. Biodeg., 4, 1-5. 20. Gupta V.K., Carrott P.J.M., Ribeiro Carrott, M.M.L., Suhas. (2009) Low-cost adsorbents: growing approach to wastewater treatment-a review. Critic. Rev. Environ. Sci. Technol., 39, 783-842. 21. Kavitha D., Namasivayam C. (2007) Experimental and kinetic studies on methylene blue adsorption by coir pith carbon. Bioresour. Technol., 98, 14-21. 22. Bello O.S., Adelaide O.M., Hammed M.A., Popoola, O.A.M. (2010) Kinetic and equilibrium studies of methylene blue removal from aqueous solution by adsorption on treated sawdust. Maced. J. Chem. Chem. Eng., 29, 77-85. 23. Shaoo R.N., Das S.C., Reddy B.R, Rath P.C., Das R.P. (2001) Adsorption of copper on manganese nodule residue obtained from NH3-SO2 leaching. Hydrometallurgy, 62, 185-192. 24. Gupta V.K., Ali I., Saini V.K. (2004) Removal of rhodamine b, fast green, and methylene blue from wastewater using red mud, an aluminum industry waste. Ind. Eng. Chem. Res., 43, 1740-1747. 25. Kuan W.H., Chen C.Y., Hu C.Y. (2011) Removal of methylene blue from water by γ-MnO2. Water Sci. Technol., 64, 899-903. 26. Hajjaji M., Alami A., El Bouadili A. (2006) Removal of methylene blue from aqueous solution by fibrous clay minerals. J. Hazard. Mater., B135, 188-192. 27. Hong S., Wen C., He J., Gan F., Ho Y.S. (2009) Adsorption thermodynamics of methylene blue onto bentonite. J. Hazard. Mater., 167, 630-633. 28. Dey M.D., Shukla R., Bordoloi N.K., Doley R.,
REFERENCES 1. Deliyanni E.A., Lazaridis N.K., Peleka E.N., Matis, K.A. (2004) Metal removal from aqueous solution by iron-based bonding agents. Environ. Sci. Pollut. Res., 11, 18-21. 2. Rafatullah M., Sulaiman O., Hashim R., Ahmad, A. (2010) Adsorption of methylene blue on low cost adsorbent: A review. J. Hazard. Mater., 177, 70-80. 3. Y.C., Uma and Upadhyay, S.N. (2011) An economically viable removal of methylene blue by adsorption on activated carbon prepared from rice husk. Can. J. Chem. Eng., 89, 377-383. 4. Crini G. (2006) Non-conventional low-cost adsorbent for dye removal: A review. Bioresour. Technol., 97, 1061-1085. 5. Hameed B.H., Ahmad A.A. (2009) Batch adsorption of methylene blue from aqueous solution by garlic peel, an agricultural waste biomass. J. Hazard. Mater., 164, 820-875. 6. Tang Z., Liu C., Chen Y., Jiang L., Ji X., Jiang, W. (2010) Batch and fixed-bed adsorption of actual dyeing wastewater on sludge-based adsorbent from pyrolusite-catalyzed pyrolysis. Fresenius Environ. Bull., 19, 3000-3006. 7. Shi H., Li W., Zhong L., Xu, C. (2014) Methylene blue adsorption from aqueous solution by magnetic cellulose/graphene oxide composite: Equilibrium, kinetics, and thermodynamics. Ind. Eng. Chem. Res., 53, 1108-1118. 8. Mohan S.V., Sailaja P., Srimurali M., Karthikeyan J. (1999) Color removal of monoazo acid dye from aqueous solution by adsorption and chemical coagulation. Environ. Eng. Policy, 1, 149-154. 9. El Gohary F., Tawfik, A. (2009) Decolorization and COD reduction of disperse and reactive dyes wastewater using chemical-coagulation followed by sequential batch reactor (SBR) process. Desalination, 249, 1159-1164. 10. Seculaa M.S., Cagnonb B., De Oliveirac T.F., Chedevilleb O., Fauduet H. (2012) Removal of acid dye from aqueous solutions by electrocoagulation/GAC adsorption coupling: Kinetics and electrical operating costs. J. Taiwan Inst. Chem. Eng., 43, 767-775. 11. Mkpenie V.N., Abakedi O.U. (2015) Electrocoagulation of azo-2-naphthol dye using aluminium electrodes: effect of solvent and kinetics of adsorption. Current Res. Chem., 7, 34-43. 12. Kannan N., Sundaram M.M. (2001) Kinetics and mechanism of removal of methylene blue by adsorption on various carbons-A comparative study. Dyes and Pigments, 51, 25-40.
Demirkıran et al. Mong. J. Chem., 18 (44), 2017, 5-11 Mukhopadhyay R. (2015) Mechanism of adsorptive removal of methylene blue using dried biomass of rhizopus oryzae. Appl. Biochem. Biotechnol., 177, 541-555. 29. Ofomaja A.E. (2009) Equilibrium sorption of methylene blue using mansonia wood sawdust as biosorbents. Desalination Water Treat., 3, 1-10. 30. Lazima Z.M., Mazuina E., Hadibarataa T., Yusop Z. (2015) The removal of methylene blue and remazol brilliant blue R dyes by using orange peel and spent tea leaves. Jurnal Teknologi, 74, 129-135. 31. Zhang W., Cheng C.Y. (2007) Manganese metallurgy review. Part I: Leaching of ores/secondary materials and recovery of electrolytic/chemical manganese dioxide. Hydrometallurgy, 89, 137-159. 32. Nayl A.A., Ismail I.M., Aly H.F. (2011) Recovery of pure MnSO4∙H2O by reductive leaching of manganese from pyrolusite ore by sulfuric acid and hydrogen peroxide. Int. J. Miner. Process., 100, 116123. 33. Ajmal M., Rao R.A.K., Siddiqui B.A. (1995) Adsorption studies and the removal of dissolved metals using pyrolusite as adsorbent. Environ. Monitor. Assess., 38, 25-35.
34. Bernard S., Chazal P.H., Mazet M. (1997) Removal of organic compounds by adsorption on pyrolusite (β-MnO2). Water Res., 13, 1216-1222. 35. Chakravarty S., Dureja V., Bhattacharyya G., Maity S., Bhattacharjee S. (2002) Removal of arsenic from groundwater using low cost ferruginous manganese ore. Water Res., 36, 625-632. 36. Rout K., Mohapatra M., Mohapatra B.K., Anand S. (2009) Pb(II), Cd(II) and Zn(II) adsorption on low grade manganese ore. Int. J. Eng. Sci. Technol., 1, 106-122. 37. Liu C., Wang X., Li X., Cao W., Yang J. (2012) Detoxification of arsenite through adsorption and oxidative transformation on pyrolusite. Clean-Soil Air Water, 40, 1265-1272. 38. Shen W., Liao B., Sun W., Su S., Ding S. (2014) Adsorption of Congo red from aqueous solution onto pyrolusite reductive leaching residue. Desalination Water Treat., 52, 3564-3571. 39. Demirkıran N. (2015) Copper adsorption by natural manganese dioxide. Trans. Nonferrous Met. Soc. China, 25, 647-653.
Report "Adsorption of methylene blue from aqueous solutions by pyrolusite ore"


This party will showcase Art, Music, & Film, of All Things Winter & representative of the Holiday!
Your going out on the town. Which do you rock?
Follow XYZ KiDS on Instagram.
Find me in the paint isle.
You know how I'm rocking... - Bossman Goonie.


If a small child hurts their finger they run to their mother crying. All mothers have to do is to kiss the finger and it is well again. Children know their mother loves them and have made a great many sacrifices for them.
In the same way we look onto Mary, as our heavenly mother. She is the mother of us all. We look on her as our mother who loves us a great deal, who watches over us to protect us. She is the mother to whom we can tell every joy and every sorrow. We remember Jesus' words as he was dying on the cross; he said to Mary, 'Woman behold your son', and to John he said, 'Son, behold your mother' (John 19:26-27). We have always regarded this little incident as being symbolic for us: as Jesus was dying on the cross gave us his mother to be our mother also.
The reason for our great joy this week is because we celebrate Mary's Assumption into heaven this was a great privilege given to our heavenly mother.
Mary's greatness lies in the fact that she was humble before God and surrendered herself to God. Her words to the angel at the annunciation are words that we need to meditate on a great deal, 'Let it be done to me according to your word.' (Luke 1:38) Surrendering of herself to God did not mean a perpetual spiritual honeymoon but a giving of herself more and more to God as time went on. We can see evidence for this in the Gospels: at the presentation of Jesus in the temple, Simeon told her that her soul would be pierced with sorrow; when Jesus was twelve years old the family had a misunderstanding over why Jesus got lost for three days. Mary once again learned more about surrendering to God as Jesus told her that he had to be about his Father's business.
This important feast day was celebrated on Wednesday 15 August. Thank you to our beautiful Year Four classes who led the Mass and the work of their awesome teachers in preparing the children. Special thanks to Mrs Alison Yeo and our talented choir for raising the roof at Church in celebration of this great feast day. Special congratulations to Xeline Dequina, Lillian Harris, Tamsyn Slater, Jessica Hannah for their amazing singing particularly our soloists, these are the leaders of the future.
Wow we had a great assembly last Friday when our talented Year One classes took to the stage. They were just amazing and really made us all smile. Part of their assembly was thanking Father Grant for all he has done for our school and parish community. It was a wonderful way to say thank you and the staff and students of Year One were just sensational.
Orienteering is an awesome adventure where you are asked to follow a course through differing terrain and make your way through checkpoints not only that but you are timed as well. We have some amazing students that have been training for this event. Mr Mike Sibbald has been passionate about orienteering for many years and has been very active in this sport. He has shared his passion with many students over many years and the result is our students have always achieved well in this sport. We have seen the success of past students when they have moved onto La Salle and continued to dominate this sport. This year training has been undertaken by many of our students and they are moving from strength to strength. Mr Sibbald and Mr Harris has been working with all student and now have teams ready to participate in the orienteering contest which is coming up soon.
I would like to thank our amazing mums who have come in to cover books and resources for our school. Some wonderful parents have even taken books home to cover, this is such a wonderful gift for our school, to have parents volunteering, and we are blessed. I would like to thank each and every one of you.
On Tuesday our sensational students in our school choir sang at the Performing Arts Festival. Mrs Alison Yeo led our choir and certainly continues to be an awesome leader of our music program at St Brigid's. On the Day Mrs Bernadette Bombardieri was our accompanist, this really helps our student and they were a joy to listen to. I love to listen to our choir they have amazing voices and work so beautifully together to represent our school.
We are so fortunate to have such an awesome P & F in our school, these go getters are involved in so many events in our school. They were part of the covering of books as well as raising funds for our school so that we can purchase items that make our lives easier. This week the P & F have assisted us in automating our PA system and upgrading it at the same time as well as upgrading the amplifier in the hall. This will allow our year six students to remain in class rather than having to run up to the front office every day after every break to ring the siren. We really appreciate the support we have from this great group of parents.
Our Next P & F meeting is Tuesday 21 August at 9.00am in the MacKillop hall boardroom. Please feel free to join us as we would love to see you there.
Presently as a Board we are preparing a parent survey and would value your feedback. We are constantly looking for ways to improve and recognise the things that we are doing well. We are currently placing the survey online to make it easier for parents but if a parent would like a paper copy that can be arranged. Survey should come out late next week.
Auditory Processing is the ability to understand what people say, and giving the correct meaning to language that is heard. It develops slowly, can sometimes take years, varies greatly between individuals and can affect learning, self-esteem and behaviour. Intelligent and high-achieving children may experience Auditory Processing difficulties.
• Difficulty sounding out words and spelling.
• Reading and comprehension difficulties.
• Inattentive or selective hearing.
• Talkative OR quiet OR withdrawn.
• In trouble often, but doesn't know why.
• Look at the listeners and read their facial expressions and body language.
• Listen to the child and consider that they may have heard a 'different' message.
• Reduce language overload….short, concise instructions are best.
• Insisting that a child looks at you can increase anxiety and reduce understanding.
• Allow 'think time'….teach and expect children to think before responding to questions.
• Expect to say things only once.
• Give positive instructions…..'Please walk', rather than, 'Don't run'.
• Move closer to the child when giving explanations or instructions.
• Ensure you have their attention before speaking.
• Lip reading can help some children.
• Check the child's understanding by watching his reactions; don't ask him to paraphrase or question his understanding.
Congratulations to the Year Four Classes for hosting this special Feast Day Mass, one of two holy days of obligation (the other being Christmas). Well done to all children for your beautiful participation, along with Mrs Yeo and the choir for making this a very memorable liturgy. Thank you to Fr Benny for leading our celebration.
The Year 3 & Year 5 classes completed this online assessment over the past two weeks. Results will be received and passed onto parents later in the year.
Congratulations to the Year Six Classes for their fantastic participation this week with their reflection day in preparation for their Confirmation. We also thank Karl Brown and his assistant Brigette for hosting this special annual retreat for our students.
Please continue to bring in your used batteries for our school battery recycling competition that will be running throughout this term. We will have an update of the placings for the classes in next week's Link.
Kindy- Year 2 will be from 4.30pm – 6.00pm and the Year 3-6 Disco will be from 6.30-8.00pm. We ask that you pick up your children promptly after the disco as the staff would like to return home at a reasonable hour. Tickets are being sold out the front of the office. This is our last disco of the year so please come along and have a great time.
If you have vegetable and fruit scraps and stale bread we require this for our chickens. These can be left in the bucket at the front of the office. Items not for the chicken scraps: banana peels, potatoes, no meat and especially no chicken.
As part of our sustainability project we will be selling eggs on Friday morning 24 August at assembly for $5.00 a dozen. The money goes towards feeding the chickens. If you would like to pre order eggs please come and see me (Mrs Brown) in the office.
• Parents & Friends meeting: Tuesday 21 August, 9am. MacKillop Hall Boardroom. Young children welcome.
• Colour Fun Run - Wednesday 10 October 2018.
All items are available to purchase from outside the Administration office before school and after school each day.
BOUNCY BALLS: The children have been enjoying sensory play in both Before and After school care. To continue and extend on the children's interest and incorporate science, we made our very own bouncy ball, learning all about chemical reactions.
HANNA BEADS: Hanna beads has been a very popular activity, where the children have continued to freely follow and extended on their own interest with enthusiasm, curiosity, energy and concentration. The children are using their imagination and creative skills in designing new patters.
PUFF PAINTS: To continue with science and chemical reactions and to incorporate Childrens interest in painting, we made puff paint during before school care. We got to witness the magic of science when we put our painting in the Microwave. Our painting puffed up. It was Amazing!


Welcome to AmPro Racing, Yamaha Motor Corporations Premiere Off-road Racing Program!
The AmPro Yamaha Race Team is compiled of the world's best and brightest off-road racers. We have stood the test of time and have proven to be an elite force in the off-road racing industry.Dignity, Respect, and Confidence make up our core values and we stick to these like glue through thick and thin!
Led by 7 time National Champion and AMA Hall of Fame Member Randy Hawkins, our goal is to create a platform of opportunity for talented young riders across the country and turn them into National Champions!
We put our families first and stand true to our beliefs.


text:
Friend J. Lo on her behalf was flirting with DiCaprio via SMS
It happened during the filming of "Car karaoke" with the participation of the singer.
On air Comedy show presenter James Corden grabbed a smartphone to its guests Jennifer Lopez, found her in the person of Leonardo DiCaprio and sent him a romantic message: "hi, baby! I think that today I will finish early. Do you have any suggestions? J. Lo".
Leo, of course, unable to ignore unexpected TEXT from the Jennifer Lopez…
"You mean tonight? Would you like to go to the club?", – answered room j-Lo Di Caprio.
SMS received, Jennifer and her friend laughed heartily. "But Leo really thought it I wrote him a message, said the singer to the camera.
However, Leo is unlikely to be offended by a friend. Over the actor often make fun of friends and the media, and it applies to everything with humor. What are Internet memes with Leonardo DiCaprio before "Oscar" (read more HERE)!
Also on the set of "Car karaoke" Jennifer Lopez sang with James Probably the songs that is On The Floor and Jenny from the Block, and Booty and has taught each of his trademark dance moves.
Also, J. Lo proved once again that her buttocks no silicone, and she loves everything natural and organic.
Experiment: Nespresso announces competition for young filmmakers
Star of TV series "Police Rublyovka" lost 10 kg thanks to the magic


text:
NYPD, Drive Change, organize food truck for Brooklyn residents without gas
By CeFaan Kim, Eyewitness News
BROWNSVILLE, Brooklyn (WABC) -- NYPD officers are coming to the rescue Tuesday night for some folks who live in Brooklyn, who have not had gas to cook their food for more than a month.
Police have organized a food truck to prepare and deliver dinners for hundreds who live in a housing project in Brownsville.
They're the type of laughs and smiles we can sure use a lot more of these days.
In a time when our nation is at bitter odds over lives that matter, black lives, blue lives, all lives.
In Brownsville, you almost wouldn't know our country is embroiled in a heated debate.
What you're seeing here is what happens when people care, and it starts with Police Officer Jason Macaluso.
"I walk these streets every day. These are the people that I know and I work for," Officer Macaluso said.
He's talking about the hundreds of residents at the Howard Houses who haven't had gas for more than a month, unable to cook.
"I make the best grilled cheese you ever tasted trust me. I'm not making that up," Macaluso said.
So the NYPD brought in Roy Waterman, co-founder of Drive Change to provide free meals.
Many of these residents won't have gas back on until the New Year and it was that thought of not having that gas through the holidays that gave birth to this idea.
But Drive Change is so much more than a food truck.
It's a training program for young people returning home from jail and prison, teaching them new skills.
"We're playing our part in the movement. We can't do everything but what he can do is realize there's a power in a shared meal," Waterman said.
"It's not the best neighbors, but it's something for them to do once in a while," said Brandon Reyes, a resident.
Residents say what's in these boxes is much more than just a meal.
"It means honestly like care and love because honestly some people wouldn't have had something to eat today but they came here and got blessed," a resident said.
"When people are unhappy it is our business," said Susan Herman, Dep. Commissioner Collaborative Policing NYPD.
brownsvillenew york citycharitynypdfood truck


text:
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text:
Tylophora rhizophoretorum är en oleanderväxtart som beskrevs av Rudolf Schlechter. Tylophora rhizophoretorum ingår i släktet Tylophora och familjen oleanderväxter. Inga underarter finns listade i Catalogue of Life.

Källor

Oleanderväxter
rhizophoretorum


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text:
Carriera

Carolina Panthers
Chinn al college giocò a football alla Southern Illinois University dal 2016 al 2019. Fu scelto nel corso del secondo giro (64º assoluto) del Draft NFL 2020 dai Carolina Panthers. Debuttò come professionista nella gara del primo turno contro i Las Vegas Raiders mettendo a segno 8 tackle. Alla fine di ottobre Chinn fu premiato come rookie difensivo del mese in cui mise a segno 30 tackle, 4 passaggi deviati e un intercetto. Nella settimana 12 contro i Minnesota Vikings divenne il primo giocatore della storia a ritornare due fumble in touchdown in due azioni consecutive. A novembre fu nuovamente premiato come rookie difensivo del mese in cui mise a segno 30 tackle e forzò un fumble. La sua prima stagione si chiuse con 116 tackle, un sack e un intercetto in 15 presenze.

Palmarès
Rookie difensivo del mese: 2
ottobre e novembre 2020
All-Rookie Team - 2020

Famiglia
Chinn è il nipote dell'ex giocatore dei Denver Broncos e membro della Pro Football Hall of Fame Steve Atwater.

Note

Collegamenti esterni


text:
Amazon quietly introduces flight bookings for users in India
By Kevin May | May 17, 2019
A possible sign of things to come for Amazon: the e-commerce giant has quietly introduced flight search and booking on its platform in India.
The service is only for flights within India at the moment and is powered by domestic online travel agency, Cleartrip.
Amazon is expected to outline further details regarding the service early next week.
The integration works through the Amazon Pay section in the site, where members can select services ranging from utility bills to gift cards.
A "Flights" button is now featured alongside and takes users to the white label version of the OTA's existing flight functionality.
Carriers such as AirAsia, IndiGo, Air India and GoAir are shown in the search results.
Get a dose of digital travel in your inbox each day
A 15% cashback offer is currently in play and is redeemed when users complete the booking.
The emergence of a flight booking tool comes amid ongoing speculation that Amazon will make a concerted effort to re-enter the travel space.
Its most recent attempt was the Amazon Destinations service, which opened and closed in the space of five months in 2015.
Much of the talk in industry circles over the course of the last 18 months has been concentrated on what Amazon could do with hotel bookings, so the introduction of flights as a potential first move is surprising.
In an article earlier this week, finance house Morgan Stanley outlined how the entry of Amazon into the online travel business could have far-reaching consequences, especially for the powerful online travel agency incumbents.
The company's move into the industry could give it a baseline $600 million profit on an annual basis - but this was only taking hotels into account.
In addition, Morgan Stanley says, Google could see its travel ambitions under threat from a range of tactics that could be deployed by a company that already has 300 million estimated and engaged customers.
Online Travel Agency


text:
BREAKING: Purplebricks exits US after less than 2 years in market
Company valuation has fallen by more than 75% since the UK-based brokerage launched in Los Angeles in 2017
Tim Arterbury | Unsplash
by Veronika Bondarenko |
Following months of uncertainty over Purplebricks' future in the United States, the flat-fee brokerage is exiting the U.S. market, less than two years after launching in Los Angeles in September 2017.
Following months of uncertainty over Purplebricks' future in the United States, the flat-fee brokerage is exiting the market, less than two years after launching in Los Angeles in September 2017.
As first reported by Bloomberg, the U.K. company saw its stock climb by as much as 5 percent on Wednesday after plummeting by more than 75 percent since entering the country in 2017. Last year, the company reported a full-year operating loss of 34.1 million pounds, or approximately $42.9 million.
The announcement was met by snark among some industry professionals. Jason Frazier, of Shred Media, wrote that Purplebricks can "Brexit, stage left" on Facebook.
In the months leading up to Wednesday's announcement, Purplebricks went through a major turnover in leadership roles, including the departure of U.S. CEO Eric Eckardt in May. The company offered an upfront flat fee of around $3,600 but has also experimented with more traditional models after seeing the flat-fee approach flounder in the U.S.
Also in May, the company announced it was shuttering its operations in Australia after two and a half years in the country. The firm also said at the time it was reviewing its operations in the U.S., hinting then that it might retreat here as well.
Overall, the future of the company has been uncertain. Last month, German media company Axel Springer has purchased tens of millions of Purplebricks shares, leaving some to speculate that the company, which publishes a number of European newspapers and also owns the U.S.-based website Business Insider, was devising a takeover.
Purplebricks did not immediately respond to Inman's request for comment about the exit.
Email Veronika Bondarenko
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text:
Q: How to customize a new colour theme? In gnome-shell, I have changed the theme to Numix.
But, in Transmission, the progress bar is now invisible:

I would like to change some colours in the theme configuration to be able to see that progress bar. I have seen that this is reported as a bug, but is there any way to fix it myself?

A: The Transmission issue got fixed in this commit

redpajama_set_name: RedPajamaStackExchange


1Now King Solomon was king over all Israel. 2These were his officials: Azariah the son of Zadok [was] the priest; 3Elihoreph and Ahijah, the sons of Shisha [were] secretaries; Jehoshaphat the son of Ahilud [was] the recorder; 4and Benaiah the son of Jehoiada [was] over the army; and Zadok and Abiathar [were] priests; 5and Azariah the son of Nathan [was] over the deputies; and Zabud the son of Nathan, a priest, [was] the king's friend; 6and Ahishar was over the household; and Adoniram the son of Abda [was] over the men subject to forced labor.
7Solomon had twelve deputies over all Israel, who provided for the king and his household; each man had to provide for a month in the year. 8These are their names: Ben-hur, in the hill country of Ephraim; 9Ben-deker in Makaz and Shaalbim and Beth-shemesh and Elonbeth-hanan; 10Ben-hesed, in Arubboth (Socoh [was] his and all the land of Hepher); 11Ben-abinadab, [in] all the height of Dor (Taphath the daughter of Solomon was his wife); 12Baana the son of Ahilud, [in] Taanach and Megiddo, and all Beth-shean which is beside Zarethan below Jezreel, from Beth-shean to Abel-meholah as far as the other side of Jokmeam; 13Ben-geber, in Ramoth-gilead (the towns of Jair, the son of Manasseh, which are in Gilead were his: the region of Argob, which is in Bashan, sixty great cities with walls and bronze bars [were] his); 14Ahinadab the son of Iddo, [in] Mahanaim; 15Ahimaaz, in Naphtali (he also married Basemath the daughter of Solomon); 16Baana the son of Hushai, in Asher and Bealoth; 17Jehoshaphat the son of Paruah, in Issachar; 18Shimei the son of Ela, in Benjamin; 19Geber the son of Uri, in the land of Gilead, the country of Sihon king of the Amorites and of Og king of Bashan; and [he was] the only deputy who [was] in the land.
20Judah and Israel [were] as numerous as the sand that is on the seashore in abundance; [they] were eating and drinking and rejoicing.
21Now Solomon ruled over all the kingdoms from the River [to] the land of the Philistines and to the border of Egypt; [they] brought tribute and served Solomon all the days of his life.
22Solomon's provision for one day was thirty kors of fine flour and sixty kors of meal, 23ten fat oxen, twenty pasture-fed oxen, a hundred sheep besides deer, gazelles, roebucks, and fattened fowl. 24For he had dominion over everything west of the River, from Tiphsah even to Gaza, over all the kings west of the River; and he had peace on all sides around about him. 25So Judah and Israel lived in safety, every man under his vine and his fig tree, from Dan even to Beersheba, all the days of Solomon. 26Solomon had 40,000 stalls of horses for his chariots, and 12,000 horsemen. 27Those deputies provided for King Solomon and all who came to King Solomon's table, each in his month; they left nothing lacking. 28They also brought barley and straw for the horses and swift steeds to the place where it should be, each according to his charge.
29Now God gave Solomon wisdom and very great discernment and breadth of mind, like the sand that is on the seashore. 30Solomon's wisdom surpassed the wisdom of all the sons of the east and all the wisdom of Egypt. 31For he was wiser than all men, than Ethan the Ezrahite, Heman, Calcol and Darda, the sons of Mahol; and his fame was [known] in all the surrounding nations. 32He also spoke 3000 proverbs, and his songs were 1,005 33He spoke of trees, from the cedar that is in Lebanon even to the hyssop that grows on the wall; he spoke also of animals and birds and creeping things and fish. 34Men came from all peoples to hear the wisdom of Solomon, from all the kings of the earth who had heard of his wisdom.


text:
Hamed Tatari (pers. حامد تاتاري) – irański zapaśnik w stylu wolnym. Brązowy medalista mistrzostw Azji w 2013. Piąty w Pucharze Świata w 2013 roku.

Bibliografia

Irańscy zapaśnicy


text:
Dentex is a genus of fish in the family Sparidae.

Species
There are currently 14 recognized species in this genus:
 Dentex abei Iwatsuki, Akazaki & Taniguchi, 2007 (Yellowfin seabream)
 Dentex angolensis Poll & Maul, 1953 (Angolan dentex)
 Dentex barnardi Cadenat, 1970 (Barnard's dentex)
 Dentex canariensis Steindachner, 1881 (Canary dentex)
 Dentex carpenteri Iwatsuki, S. J. Newman & B. C. Russell, 2015 (Yellow snout seabream)
 Dentex congoensis Poll, 1954	(Congo dentex)
 Dentex dentex	(Linnaeus, 1758) (Common dentex)
 Dentex fourmanoiri Akazaki & Séret, 1999 (Fourmanoir's seabream)
 Dentex gibbosus (Rafinesque, 1810) (Pink dentex)
 Dentex hypselosomus Bleeker, 1854 (Yellowback seabream)
 Dentex macrophthalmus (Bloch, 1791) (Large-eye dentex)
 Dentex maroccanus Valenciennes, 1830 (Morocco dentex)
 Dentex spariformis J. D. Ogilby, 1910 (Saffronfin seabream)
 Dentex tumifrons (Temminck & Schlegel, 1843) (Crimson seabream)

References

Sparidae
Marine fish genera
Taxa named by Georges Cuvier