Suggestion: If you ask a specialist camera shop which does printing of pictures they may have paper. Also till slips fade in the sun - but that is the ink that fades. For fabric, try a drama workshop. I am thinking this may be something that could be used on stage. I would be interested to know what you come up with. Anita Walthew Maybe if you source some xray film? Try these Elizabeth Schubert PHOTOSYNTHESIS EXPTS Thanks for the photosynthesis experiment tips. Here's a summary; Elodea is still preferred but the cut stem of the Elodea sometimes traps the expanding oxygen bubble at the end of the stem, not allowing a steady flow of bubbles. Cut a few mm of the tip off under water. This often helps to get the bubble stream working. Also, add some sodium bicarbonate to each plant to provide carbon dioxide. They often tail off in oxygen production toward the end of a lesson, but a little sodium bicarbonate often starts them again. Students break off an end piece and then weight the growth end with a paper clip and place in a boiling tube weighted end down, cut end up. The tube is then filled with water (seeded with sodium bicarbonate) and placed at varying lengths away from a lamp. Students then count the number of bubbles that rise from the cut end of the weed over a specific time period. Jeanette Price Our biology teacher is looking to do this instead of the standard tungsten filament light with cellophane; I vaguely remember that LED lights do not work so well because of the lower energy levels any thoughts? Liz PIPETTES Hi All. I have a small problem with my pipettes; they are not draining properly, leaving droplets of solution behind inside the pipette when they are used. Is there something I can wash them in to make them drain properly again? Catriona Righton Have you tried rinsing the pipettes with meths or alcohol. Any remaining droplets should evaporate away. Helen Roper . PIPETTE FILLERS What does everyone use as a pipette pump? We have tried Dijis, pi pumps and the 3 way rubber pumps all without success in the classroom. The 3 ways that are in use at the moment are perishing as the students seem to be overfilling
Suggestion: If you ask a specialist camera shop which does printing of pictures they may have paper. Also till slips fade in the sun - but that is the ink that fades. For fabric, try a drama workshop. I am thinking this may be something that could be used on stage. I would be interested to know what you come up with. Anita Walthew Maybe if you source some xray film? Try these Elizabeth Schubert PHOTOSYNTHESIS EXPTS Thanks for the photosynthesis experiment tips. Here's a summary; Elodea is still preferred but the cut stem of the Elodea sometimes traps the expanding oxygen bubble at the end of the stem, not allowing a steady flow of bubbles. Cut a few mm of the tip off under water. This often helps to get the bubble stream working. Also, add some sodium bicarbonate to each plant to provide carbon dioxide. They often tail off in oxygen production toward the end of a lesson, but a little sodium bicarbonate often starts them again. Students break off an end piece and then weight the growth end with a paper clip and place in a boiling tube weighted end down, cut end up. The tube is then filled with water (seeded with sodium bicarbonate) and placed at varying lengths away from a lamp. Students then count the number of bubbles that rise from the cut end of the weed over a specific time period. Jeanette Price Our biology teacher is looking to do this instead of the standard tungsten filament light with cellophane; I vaguely remember that LED lights do not work so well because of the lower energy levels any thoughts? Liz PIPETTES Hi All. I have a small problem with my pipettes; they are not draining properly, leaving droplets of solution behind inside the pipette when they are used. Is there something I can wash them in to make them drain properly again? Catriona Righton Have you tried rinsing the pipettes with meths or alcohol. Any remaining droplets should evaporate away. Helen Roper . PIPETTE FILLERS What does everyone use as a pipette pump? We have tried Dijis, pi pumps and the 3 way rubber pumps all without success in the classroom. The 3 ways that are in use at the moment are perishing as the students seem to be overfilling
Accummulated-Wisdom-updated-2017June.docx