johvdvutqrpvcaaasalertsorg science online editors choice alert 319 5868 current issue previous issue science express science products science journal editors choice highlights recent literature science volume 319 issue 5868 dated march 7 2008 available httpwwwsciencemagorgcontentvol319issue5868twildtl copy editors choice highlights recent literature section appended editors choice highlights recent literature march 7 2008 319 5868 editors choice highlights recent literature ecology flashy affair caroline ash humans see chameleons masters camouflage lizards seem see predator avoidance family lizards evolved range talents merely changing skin tone others changing color thanks rapidly reacting neurally controlled chromatophores skin stuartfox moussalli used reflectance spectroradiometry tuned spectral sensitivities retinas chameleons potential bird predators measure conspicuousness variety lineages african dwarf chameleons preferred habitats habitat dense complex bird predators tend excluded less need disguise chameleons indulge flashy aggressive behavior changing color spectacularly social displays least chameleonseye view open hotter habitats pays live drab quiet life avoiding notice predators staying cool sandcolored merely adjusting brightness social exchanges deep bush perceive subtly changing camouflage chameleons perceive flamboyant social signaling ca plos biol 6 e25 101371journalpbio0060025 2008 climate science stirred h jesse smith around 55 million years ago height paleoceneeocene thermal maximum world much warmer place today sea surface temperatures higher everywhere equatortopole thermal gradient much shallower climate much past 500 million years warmer warm periods surface meridional temperature gradient generally appears weak explaining climate system might transferred heat low high latitudes maintain shallow thermal gradient difficult many hypotheses advanced including involving effects radiative forcing high concentrations atmospheric carbon dioxide intense ocean heat transport differences amounts locations polar stratospheric clouds extratropical atmospheric convection korty et al using coupled model intermediate complexity investigate another possibility tropical cyclones could caused enough ocean surface mixing tropics cool sea surface drive strong poleward heat flux needed produce shallow thermal gradients seem prevailed warm climates solution correct also implications might expect climate system respond anthropogenic warming hjs j clim 21 638 2008 biochemistry anyone cuppa gilbert chin inhaling soothing aroma mug peppermint tea renews sense wonder delightful mix monoterpenes produced hybrid plant mentha x piperita oil accumulates within structure called peltate glandular trichome contains high levels menthol low levels precursor pulegone side product menthofuran critical balance activities pulegone reductase produces menthones converted menthols menthofuran synthase diverts pulegone menthofuran disturbed lessthanideal environments low light riosestepa et al collected measured biochemical parameters kinetic constants metabolite concentrations validated feasible independently derived quantities gland volume oil density terpene molecular weight built biosynthetic model simulates developmental time courses optimal lowlight conditions menthol pulegone menthofuran levels earlier genetic engineering study suggested menthofuran turned transcription pulegone reductase plugging constraint model failed reproduce observed changes terpene levels instead observations could replicated assuming menthofuran acted competitive inhibitor reductase supposition confirmed lineweaverburk analysis vitro enzyme assays gjc proc nat acad sci usa 105 2818 2008 chemistry fruitful fuel proposal phil szuromi sustainable alternatives gasoline diesel fuels need recapitulate properties make currently used fuels attractive energy carriers low vapor pressure stable longterm storage horváth et al examined properties one alternative valerolactone gvla small cyclic ester produced fruits used food additive compared methanol ethanol methyl ethyl tertbutyl ethers gvl much lower vapor pressure reduces volatile emissions also low melting flash points facilitate safe storage readily hydrolyzed acid phneutral conditions readily form peroxides gvl form azeotrope water less energy needed recover distillation authors explored catalytic routes gvl sucrose conclude advances synthetic efficiency biomass gvl could serve oxygenated fuel additive even fossilfuel replacement pds green chem 10 238 2008 applied physics vapors plucked harp ian osborne optical electronic devices sniff chemical compounds high sensitivity selectivity clearly applications broad range circumstances environmental monitoring detection biohazards however compounds interest may pure form often diluted among multiple background substances artificial nose must therefore able sort complex mixtures stievater et al present chemical sensor based microoptomechanical bridge interrogated remotely using optics device microharp forms one end fabryperot interferometer comprises array microbridges bridge coated sorbent polymer sensitive particular analyte bridge also distinct length vibrates individual frequency device placed test atmosphere different compounds bind particular strings harp changing mass bridge thereby inducing shift frequency vibrates interrogating vibrational frequency bridge separately allows monitoring vapors chemical composition remotely cases organophosphonates detection concentrations 17 parts per billion iso opt express 16 2423 2008 cell biology double duty stella hurtley cell division centrosomes important organization maintenance mitotic spindle fielding et al found kinase integrinlinked kinase ilk known important cell adhesion also interacts centrosomal spindle proteins including main constituent mitotic spindle tubulin ilk inhibited cells failed assemble mitotic spindles properly resulting aberrant chromosome segregation centrosomal protein ruvbl1 important ilk targeting centrosome activity ilk important another centrosomal protein chtog promote spindle pole organization mitosis unanticipated role ilk promoting centrosomal organization spindle assembly chromosome segregation may represent important link cell adhesion mitosis smh j cell biol 180 681 2008 human genetics autism association barbara r jasny although autism highly heritable sorting genes associated complex disease difficult weiss et al searched structural mutations duplications deletions level microscopic detection genomic dna 751 families part autism genetic resource exchange found significant association autism nearly 600kb region deleted duplicated locus chromosome 16 structural mutation also observed patients childrens hospital boston group iceland occurred frequency approximately 1 patients compared less 01 general population might result unequal crossing region chromosome 16 known hotspot deletion duplication bordered two duplicated regions autism may represent summation series rare events whose detection require screening tens thousands patient samples bj n engl j med 358 667 2008 unsubscribe edit subscriptions service httpwwwsciencemagorgcgialertsmain written requests unsubscribe may sent customer service 1454 page mill road palo alto ca 94304 usa magazine news signaling careers multimedia collections help site map rss subscribe feedback privacy legal us advertise us contact us 2008 american association advancement science rights reservedaaas partner hinari agora patientinform crossref counter fri 08 aug 2008 031733 0800 science citetrack editors choice highlights recent literature