Q:We see pigments everywhere in products. They make a variety of things we see today. Where does it come from? Do they actually take a red rose pedal, grind the color and designate it as the color red?

Pigments selectively reflect and absorb specific wavelengths in the visible region of the electromagnetic spectrum, which is roughly between 400 and 800 nm wavelength. When visible light is incident on a pigment parts of the spectrum are absorbed by certain chemical bonds that are found in conjugated systems or other components of the pigment, known as chromophores or colour centres. Other wavelengths or parts of the spectrum are reflected or scattered. Many pigments are charge-transfer complexes, such as transition metal compounds, but there are others that are organometallic compounds. These have wide light absorption bands that subtract most of the colours of the incident white light. The resulting reflected light spectrum creates the appearance of a colour. The difference between a pigment and a dye is that a pigment is insoluble in the substance that it is used to colour, therfore what you actually end up with is a suspension (e.g. blue pigment in polyethylene), whereas a dye soluble in a carrier so you end up with a solution of the dye, and the solvated dye molecules have an affinity to the surface of the substance that they are being used to colour (fabric dye molecules adsorb to the surfaces of the fibres that make up the fabric).

Q:what is the relationship between chlorophyll a, accessory pigment?

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Q:hi:]i need the right order to apply skin pigments...

Pigments are usually packaged in a finely milled loose powder form. After cleansing , toning and moisturizing,let the moisturizer absorb in the skin. Apply the skin pigments using a large compact powder brush/kabuki brush in a circular motion on face neck, then apply a second layer in a downward motion. Then use Evian water Mister to set the pigment. For eye pigments, put a thin layer of skin pigment first, then apply the eye pigment using a oval shaped dome brush

Q:I am planning on purchasing MAC, but what r the differences... thanks to all...I want to have an idea before I head to the mall.

Pigment is the purest formula or color with minimal ingredients mixed in to buffer or thin out the product. Generally, the loose form is the most intense because it is lightweight and you can pack it on, mix with a medium, or layer. Pigments usually cost more than pressed forms. However, there are some pressed pigment shadows that are awesome (NARS, Make up for Ever, Urban Decay)! MAC has excellent shadows, I use a lot of them (loose pressed) in my kit. Loose pigments are great mixed with water or mixing medium to intensify. They also will last you forever!

Q:PLEASE TRY!, to awnser ANY of the questions below.~What factors cause leaves to change colors. Where do these colors come from?~What are the names of the specific chemical pigments that cause the colors we see (reds, yellows, purples, browns, greens etc.) These are the same pigments (chemical that causes color) that give fruit their different colors.~What is the process (how it happens) that cause leaves to fall off of the branches. Explain at the cell level. (picture)Please try to awnser. Thanks.

Chlorophyll leaves and Tannin enters,depends on the temperature and seasons

Q:Explain why plants need a variety of pigments to carry out photosynthesis?

It is particularly obvious in seaweeds. The pigment employed by the plant will vary according to the light available, so that seaweeds in shallow water tend to be green but those from deeper water are brown and then, where light levels are really low, seaweeds are red. In most of these cases photosynthesis is still carried out by chlorophyll but the associated pigments help with the absorption of the available light.

Q:What happens to the yellow pigments in a leaf during the summer months?

Carotenes and xanthophylls are always present in the leaves of plants. During the summer, the abundant chlorophyll masks the presence of the yellows, oranges, and reds that are also present. These other pigments are called accessory pigments and also absorb light energy used in photosynthesis.

Q:I need to find powdered paint or pigment that I can throw, for some photographs.Preferably cheap, and that wouldn't stain skin.I've looked into powder paint, though this tends to stain skin for about a week.Thanks :)

Smash up sidewalk chalk.

Q:Why do algae contain pigments other than just chlorophyll?

they stay underwater...the water swollows easy in a definite sequence, so the deeper they stay the greater distinctive is the easy and that they elect different pigments than landplants.

Q:a. chlorophyll ab. chlorophyll bc. chlorophyll cd. carotenoid pigments

Chlorophylls are greenish pigments which contain a porphyrin ring. This is a stable ring-shaped molecule around which electrons are free to migrate. Because the electrons move freely, the ring has the potential to gain or lose electrons easily, and thus the potential to provide energized electrons to other molecules. This is the fundamental process by which chlorophyll captures the energy of sunlight. There are several kinds of chlorophyll, the most important being chlorophyll a. This is the molecule which makes photosynthesis possible, by passing its energized electrons on to molecules which will manufacture sugars. All plants, algae, and cyanobacteria which photosynthesize contain chlorophyll a. A second kind of chlorophyll is chlorophyll b, which occurs only in green algae and in the plants. A third form of chlorophyll which is common is (not surprisingly) called chlorophyll c, and is found only in the photosynthetic members of the Chromista as well as the dinoflagellates. The differences between the chlorophylls of these major groups was one of the first clues that they were not as closely related as previously thought. Carotenoids are usually red, orange, or yellow pigments, and include the familiar compound carotene, which gives carrots their color. These compounds are composed of two small six-carbon rings connected by a chain of carbon atoms. As a result, they do not dissolve in water, and must be attached to membranes within the cell. Carotenoids cannot transfer sunlight energy directly to the photosynthetic pathway, but must pass their absorbed energy to chlorophyll. For this reason, they are called accessory pigments. One very visible accessory pigment is fucoxanthin the brown pigment which colors kelps and other brown algae as well as the diatoms. From this I would say the answer is c.