the following groups are responsible for colour of dye?
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In addition to chromophores, most dyes also contain groups known as auxochromes (colour helpers), examples of which are carboxylic acid, sulfonic acid, amino, and hydroxyl groups.
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Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups are brighter red. ... It is the iron in hemoglobin that gives blood its red color.
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The color of vegetables, for example spinach, is attributable the presence of various pigments, which primarily are the green chlorophylls and the yellow, orange, and red carotenoids.
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Solution. Anthocyanin is a purple colour pigment in plants which is responsible for imparting colour to the plant part and does not play any role in photosynthesis.
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A basic dye is a stain that is cationic (positively charged) and will therefore react with material that is negatively charged. The cytoplasm of all bacterial cells have a slight negative charge whengrowing in a medium of near neutral pH and will therefore attract and bind with basic dyes.
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Acidic Dyes: It is dye which has negative charge so they bind to positively charged cell structures like some proteins. ... Basic Dyes: This dye have positive charge & bind to negatively charged molecules(nucleic acid, -COOH -OH).
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Several groups of bacteria can conduct anoxygenic photosynthesis: green sulfur bacteria (GSB), red and green filamentous phototrophs (FAPs e.g. Chloroflexi), purple bacteria, acidobacteria, and heliobacteria.
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Red 40 is a chemical compound that comes from coal tars. Dyes made from coal tars are created by mixing various fragrant smelling hydrocarbons like benzyne and toluene. Back in the day (think: ancient Egyptians) dye was made from things found in nature, like flowers, leaves, roots, etc.
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['Phototrophs:', 'Chemotrophs:', 'Lithotrophs:', 'Organotrophs:', '(i) Photoautotrophs.', 'Purple Sulphur Bacteria:', 'Green Sulphur Bacteria:', '(ii) Chemoautotrophs.']
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The hexaaquachromium(III) ion is a "difficult to describe" violet-blue-grey colour. However, when it is produced during a reaction in a test tube, it is often green.
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Raw materials are divided into three major groups, namely, pigments (titanium dioxide, zinc oxide etc.), solvents (mineral turpentine) and resins and additives. Pigments are finely ground solids of different shades to give colour, durability, consistency and other properties to paint.
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Dyes and pigments are substances that impart color to a material. ... Dyes are much finer than pigments. Therefore dyes are not UV stable whereas pigments are usually UV stable. Dyes, also known as colorants in which the coloring matter is dissolved in liquid, are absorbed into the material to which they are applied.
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['p-Phenylenediamine. The most common culprit that people react to is PPD, or p-Phenylenediamine, found in darker shades. ... ', 'Ammonia. ... ', 'Hydrogen peroxide. ... ', 'Lead acetate. ... ', 'Sources.']
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Chromophore is the part of the molecule responsible for the colour in any compound. ... Auxochrome is the part of the molecule responsible for the intensity of colour in any compound. These are functional groups with lone pairs of electrons or non bonding electrons.
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 Red blood cells are able to carry oxygen so efficiently because of a special protein inside them: haemoglobin.   In fact, it is the haemoglobin that is responsible for the colour of the red blood cell.   Haemoglobin contains a haem prosthetic group that has an iron atom at its centre.
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Methylene blue is an organic chloride salt having 3,7-bis(dimethylamino)phenothiazin-5-ium as the counterion. A commonly used dye that also exhibits antioxidant, antimalarial, antidepressant and cardioprotective properties.
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Many permanent and some semi-permanent hair dyes contain a chemical called paraphenylenediamine (PPD), which is a known irritant and allergen. This is the culprit of most reactions to hair dye.