what can i do to confirm the presence of starch in leaves that i have plucked?
544139
boil it first then put some iodine on it. if it turn blue black it mean that it contain starch
365435
If your piles are external this is the wonder cure,I think its the starch but Im not sure.Take one raw ,I stipulate raw, not cooked potatoe(sweet potatoe may work but we only use ordinary european variety)   and mash it.it doesnt need to be a puree,just as long as its moisture is freely available.Take the mashed potatoe and put it in muslin approx. 2 inches long and an inch thick and wrapped twice,this is to stop the potatoe from going everywhere,also the potatoe will go black in a few hours from exposure to surrounding air.Now for the bit you will think is a joke,place the muslin where the sun dont shine,not inside but right up against the piles and overnight it may go as in my mothers case.the next day my mothers returned and she re did the above instructions and she never had them again,that was 43 years ago ,my age ,as it was pregnancy which partly caused them ,let me know that it worked as it my aim to help anyone I can.
806840
The best thing for removing a fat or oil stain -- or the oily component of a more complex stain such as salad dressing or gravy (once it's dry) -- is to rub cornstarch (or cornstarch powder, or even talcum powder) into the stain , let it sit for at least 20 minutes, and then brush it off with a dry washcloth or soft dry brush. You may need to repeat the treatment several times to fully remove the fat. It works especially well on silk and wool. So well, in fact, that further washing (or dry cleaning) is not needed.
741870
Germinate seeds on moist filter paper in petri dishes at 20 C. \nCollect root tips when they are about 1 cm long and pretreat with ice water for 24-48 h. \n Fix in Carnoy's I. \n Squash in 45 % acetic acid. \n Remove cover slips by the dry ice method and air dry. \n Drop fixative onto the preparations and flame dry. \n Dissolve 1 g of silver nitrate (AgNO3) in 1 ml of 0.02 g sodium citrate (C6H5Na3O7.2 H2O) per 500 ml distilled water, adjusted to pH 3.0 with formic acid. \n Add 1 or 2 drops of above solution (needs to be prepared fresh each time) onto the slides and place a cover slip over the preparation. \n Incubate slides in a moist chamber at 55-60 C for 30 min to several h. Monitor the silver precipitation under the microscope. \n When chromosomes are stained brown to yellow and Ag-NOR-bands appear black, staining is complete. Rinse slides thoroughly in distilled water. \n Soak in xylene and mount in Depex.
1146724
Starches that are digested into sugars.
882689
To help preserve the colors and texture of the leaves you can use gylcerin. Set stems in a vase (filled with gylcerin) as you would flowers. They then soak up the oil which helps preserve them.You can get gylcerin at pharmacies.
88453
Simple Suagrs can be tested with Benidicts Soultion which turnes from blue to yellow to orange to brown in the presense of a simple sugar when heated in a hot water bath.  Polysaccharides can be tested with iodine which turns purple in the presence of starchs.  There really is no simple test for disaccharides but they can be ruled out by testing for both simple sugars and polysaccharides.  Lipids are not carbohydrates but they can be tested for by a simple paper bag that becomes translucent when smeared with a lipid(like eating potato chips and touching a piece of paper) or with Sudan III which forms red rings on a piece of filter paper.
201466
as far i know it is the process by which the food is transported from the leaves -the site of food (starch)synthesis to other parts of the plant body. it is thru the vascular tissue phloem
701088
Ordinary starch will yield a blue colour with iodine.\n\nThe best iodine indicator (other commercial material like Vitex etc) can be made by dissolving 5 g of soluble astarch in 100 mls of boiling water. Mix raidly to dissolve. Make up to one litre with good quality water. Add one pellet of NaOH or KOH and add a few drops of 0.1% phenolphthalien indicator. When the colour disappears, discard it and make up fresh.
1062668
Hi S. r.\n\nAcid treated starch is nothing but Granular starch slightly hydrolysed with acid at low temperature.
279959
iodine turns starch black or a dark brown so you know if iodine is present in teh starch
888243
check out the material I have enclosed.
230790
Grind the leaves with sharp sand and ethanol in a pestle and mortar.\nThe solution will contain many pigments - mostly those associated with photosynthesis.\nA fine mesh filter is usually sufficient to retain the sand and debris.\nSeparate the pigments by chromatography.\nNote: extracted pigments are light sensitive and will degrade.
1172209
1. investigating starch in peanuts or other edible foods\n\n2. process of photosynthesis in plants\n\nsurry got only two in mind! hope it help
120628
To detect starch just add some drops of iodine to the substance you want to test. Iodine is yellow/brown and turns dark blue/black in the presence of starch. As for fat, just rub your substance if it is a solid on a piece of paper or place a drop of it on the paper if it is a liquid. If the substance leaves a translucent stain on the paper( stain that does not evaporate) then it has fat.
808481
try API20E or any other commercial available kit. or conventional sugar test recommended by CDC.
740769
USE DIFFERENT STAINING FOR BACTERIA EX. GRAM STAINING. LOOK UP DIFFERENT BACTERIA STAINING