Production Details of Chrome Oxide Green
Molecular Formula: Cr2O3
HS Code: 2819900000
CAS No. : 1308-38-9
Appearance: green powder
Specifications: (Quality Standard: HG/T 2775-1996)
Packing Of Chrome Oxide Powder :
25 kg/bag , Or 220kg / drum , or as your requirements .
Usage Of Chrome Oxide Powder :
Mainly used in paint, glass, ceramics, building materials colorants, printing ink, metal polishing, smelting metal chromium, fire-proof material, etc.
Relative Color Strength
105°C Volatile Matter
PH of Water Solution
Oil Absorption (g/ 100g)
Residue on Sieve of 0.045 mm
1200℃ Ingition Decerement
Acid& Alkali Resistance
- 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 are the roles and type of plant pigments?
- Pigments are able to absorb specific wavelengths of light which power photosynthesis. Chlorophyll, which is green, absorbs all wavelengths except green. Each photon excites an electron in the light harvesting complexes of a photosystem in a chlorophyll molecule, eventually producing ATPs. Other pigments will be a different color and will be able to absorb other wavelengths, maximizing energy absorbency when the sun's rays change. Pigments are chemicals inside living things that absorb certain types of light. In plants, the pigment chlorophyll in leaves absorbs sunlight for photosynthesis to work, where the energy comes from. Chlorophyll absorbs all light except green, which is reflected. That's why most plants are green...
- Q:Why do plants contain so many pigments?
- Typically most plants only contain chlorophyll which is green. Which plants are you referring to?
- Q:Physics: Compare and contrast pigment color with the color seen from a light.?
- Pigments are chemicals that selectively absorb and reflect different spectra of light. When a surface is painted with a pigment, light hitting the surface is reflected, minus some wavelengths. This subtraction of wavelengths produces the appearance of different colors. Most paints are a blend of several chemical pigments, intended to produce a reflection of a given color. Mixing pigments is subtractive. Mixing light is additive. Let's take the primary pigments, red, blue and yellow. Red pigment is red because the chemical it is made of absorbs (subtracts) blue and yellow light that falls on it and reflects only red light to your eye. Similarly, blue pigment is blue because it absorbs red and yellow light and reflects only blue. So when you mix the three primary pigments together, you produce something that absorbs all of the light falling on it in equal amounts and reflects nothing to your eye. Thus, it appears black. In contrast, when you mix only red and blue light, there isn't any yellow in it, so the resulting light appears purple (the complement of yellow). Likewise, if you mix red and yellow light it appears orange (the complement of blue). If you mix all three colors of light together (in equal amounts), the resulting light appears white because it contains all of the colors of the spectrum. This explanation is sound, although greatly simplified. The two summaries above are not my own, nor do I claim them as mine.
- Q:What is the importance of the accessory pigments?
- Q:do all leaves extract contain the same pigments??why?
- Absolutely not. Leaf pigments, just to name a few, may include chlorophyll, carotenes, lutein, anthocyanins. Not only will pigment content vary between plant species, but pigment content will vary in individual plants seasonally.
- Q:advantages of having accessory pigments?
- in leaves accesory pigments are important because chlorophyll the main plants pigment are easilly broken down by low temperature. if chlorophyll, the green pigmnet is broken down accesory pigments give the leaves its color, usually orange, yellow
- Q:what is the function of plants pigment?
- Pigments are molecules that absorb specific wavelengths (energies) of light and reflect all others. Pigments are colored: the color we see is the net effect of all the light reflecting back at us. Absorb: Electrons in molecules can exist at specific energy levels. Normally they exist at the lowest possible energy level they can. However, if enough energy comes along to boost them into the next level, they can absorb that energy and occupy that higher level. This is what pigments do. The light they absorb contains' just the right amount' of energy necessary to push them into the next level. Any light that does not have enough or has too much energy can not be absorbed and is reflected. The electron in the higher energy level, however, does not 'want' to stay there(i.e. it is unstable). It 'wants' to return to its normal lower energy level. In order to do this it must get rid or release the energy that has put it into the higher energy state to begin with. This can happen several different ways: 1) The extra energy can be converted into molecular motion and lost as heat. 2) Some of the extra energy can be lost as heat energy, while the rest is lost as light. This re-emission of light energy is called florescence. 3)The energy, but not the e- itself, can be passed onto another molecule. This is called resonance. 4)The energy and the e- can be transferred to another molecule. Plant pigments usually utilize the last two of these reactions to convert the sun's energy into their own. When chlorophyll is isolated from the enzymes it is associated with, the second scenario can be seen to happen.
- Q:what is the role of photosynthetic pigments in plants?
- photosynthetic pigment or antenna pigment is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy necessary for photosynthesis. Green plants have five closely-related photosynthetic pigments (in order of increasing polarity): Carotene - an orange pigment Xanthophyll - a yellow pigment Chlorophyll a - a blue-green pigment Chlorophyll b - a yellow-green pigment Phaeophytin a - a gray-brown pigment Phaeophytin b - a yellow-brown pigment Chlorophyll a is the most common of the six, present in every plant that performs photosynthesis. The reason that there are so many pigments is that each absorbs light more efficiently in a different part of the spectrum. Chlorophyll a absorbs well at a wavelength of about 400-450 nm and at 650-700 nm; chlorophyll b at 450-500 nm and at 600-650 nm. Xanthophyll absorbs well at 400-530 nm. However, none of the pigments absorbs well in the green-yellow region, which is responsible for the abundant green we see in nature.
- Q:PIGMENT: by MAC COSMETICS? What is it?
- Pigment is a loose powder that has highly concentrated color. They come in different finishes like matte or shimmery. You can use them as eye shadows and such, which is what most people do with them. They show up better and the metallic ones can be foiled (more vivid color and looks like metal almost) if you use them wet by putting a little bit of mixing medium or eye drops on your brush before dipping it in the pigment and applying it. They can also be used as lip colors by mixing with a clear lipgloss, or eyeliner if you use them wet or mix them with something like MAC's special eyeliner mixing medium. They also make a mascara mixing medium that can be used with pigments. Pigments really are a handy, universal product to have! Keep in mind that some pigments are not safe for use in the eye and/or lip area. If you look at MAC's website where the pigments are, you can check out the specifics about that under View Recommended Use. Also, if you use pigments wet, it's best to get a little bit of it in the jar lid, then dip the brush in it. That way you won't dampen and ruin the pigments in the jar, and moisture in the jar could promote the growth of bacteria.
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