Why does dibenzalacetone have a pale yellow colour?
971140
It is because of the conjugate dienes. i.e. Double bond C single bond C double bonds. C=C-C=C etc. These conjugated dienes absorb light in the visible spectrum and in this case it happens to be pale yellow.
112571
with yellow green the main pigment is yellow and with green yellow the main pigment is green they are basically the same color just with more pigment of one than the other
413258
It's no use trying to find that out. Those conditions are to be fully controlled to get "non-colored" products.\nAnd be careful with what you use in food products!!
432014
during age, dentine (tooth structure under the enamel) not getting more yellow. it is still in the same color (light yellow). Enamel actually not totally white, but its also translucent. During age and wearing process, enamel will get thinner, and because its translucency, teeth will looks like more yellow.
798882
no it doesnt.........its IUPAC NAME is 2,3-dihydroxypropanal which suggets that it has a linear structure with  only three carbon atoms with an alcoholic group at the 2 n 3 carbon atom and with a carbonyl group (aldehyde gropu in this case) as the terminal carbon atom\nA compound will have a cyclic structure only if its a cycloalkane , cycloalkene or an aromatic compound.........since glyceraldehyde is none of the above..........its evident that its got a linear structure.
1024876
B2 - Riboflavin - is the source of the bright yellow.  The 'flavin ring' of B2 creates the fluorescent yellow color.
257326
Yes. It means your liver is working very well to clear your blood of toxins.\n\nHigh bilirubin levels lead to a yellow skin and eyes and is called jaundice.
852371
1) Basic\n2) BTB turns yellow in a base\n3) HCI + LiOH -> H2O + LiCI\n\nI think these should be right.
728797
To be perfectly exact, the melting point of the alpha modification, which has a monoclinic crystal structure, is 53.5 C, the beta form, which is triclinic, has an mp of 54 C.\n\nI suspect your p-dichlorobenzene was contaminated, perhaps with water, causing a freezing point depression.  Another possiblility is that the sample cooled so rapidly, that you overshot the freezing point.
196165
NaHSO4 itself is acidic, so the solution's color should be yellow due to the bromcresol green being in the presence of acid
108119
Concentrated nitric acid dyes human skin yellow on contact, due to interactions with the skin protein keratin. Strangely, these yellow stains turn orange when alkalised.\n This test is referred to as Xantho proteic test and used to detect the presence of proteins
1030039
I think you might mean methylene blue. Please confirm and let us know which country you are in.
266419
It likely has to do with the energetics of each isomer. The trans conformation absorbs in the violet range of the color spectrum (the complement of yellow). The cis version likely absorbs in the higher ultraviolet range which thus explains its lack of color.
1070457
The temperature of the sum's surface gives it's characteristic color. If an object with a small hole in it were heated to the same temperature the light comming out of the hole would have the same temperature. i.e., black body radation.\n\nAlso because our eyes the characteristic light as yellow. Namely, the three color sensors in our eyes senses the Yellow more brightly than the red and blue. So, we see yellow.
888160
The same thing that gives a banana it's yellow color?
422607
When the bilirubin level gets high enough, the yellow color shows up in most visible areas--skin, urine, mucus membranes, etc; it's not just the sclera that turns yellow.
397234
normally it is a translucent gel that appears to have a slight brown yellow tint.