what are auxochromes and chromophores?
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Auxochrome is a group of atoms which will impart a particular color when attached to a chromophore but when present alone, will fail to produce that color. Chromophore is that part of the molecule which when exposed to visible light will absorb and reflect a certain color.
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Colours of light. Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours.
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['Chloroplasts.', 'Chromoplasts.', 'Gerontoplasts.', 'and Leucoplasts.']
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['Alcohol.', 'Chlorine and chlorine compounds.', 'Formaldehyde.', 'Glutaraldehyde.', 'Hydrogen peroxide.', 'Iodophors.', 'Ortho-phthalaldehyde (OPA)', 'Peracetic acid.']
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Carotenoids are ubiquitous and essential pigments in photosynthesis. They absorb in the blue-green region of the solar spectrum and transfer the absorbed energy to (bacterio-)chlorophylls, and so expand the wavelength range of light that is able to drive photosynthesis.
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The color of the pigment comes from the wavelengths of light that are reflected, or in other words, those wavelengths not absorbed. Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects. This is why plants appear green to us.
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The color components of visible light include violet, blue, green, yellow to orange, bright red and dark red. The full range of visible light wavelength stretches from about 340 nanometers to around 750 nanometers. Light in the range of 340 to 400 nanometers is near ultraviolet (UV), mostly invisible to human eyes.
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Abstract. Human skin, especially the epidermis, contains several major solar ultraviolet-radiation- (UVR-) absorbing endogenous chromophores including DNA, urocanic acid, amino acids, melanins and their precursors and metabolites.
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Chromoplasts are found in fruits, flowers, roots, and stressed and aging leaves, and are responsible for their distinctive colors. This is always associated with a massive increase in the accumulation of carotenoid pigments. The conversion of chloroplasts to chromoplasts in ripening is a classic example.
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['value. lightness or darkness of a color.', 'hue. spectral name of a color.', 'temperature. the color is either warm or cool.', 'brightness. brightness or dullness of a color.']
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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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Carotenoids are nonpolar compounds, which are divided into two subclasses, i.e., more polar compounds called xanthophylls, or oxycarotenoids, and the nonpolar hydrocarbon carotenes.
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['The light-dependent reactions;', 'The light-independent reactions, or Calvin Cycle.']
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['Photosynthesis Inputs. 6H2O, 6CO2, (light) energy.', 'Photosynthesis Outputs. C6H12O6 (glucose), 6O2.', 'Light Reactions Inputs. Light (energy), ADP, Pi, NADP, H2O.', 'Light Reactions Outputs. O2, ATP, NADPH.', 'Calvin Cycle Inputs. ... ', 'Calvin Cycle Outputs. ... ', 'Cellular Respiration Inputs. ... ', 'Cellular Respiration Outputs.']
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Photosynthetic organisms, known as photoautotrophs, capture the energy from sunlight and use it to produce organic compounds through the process of photosynthesis. In photosynthesis, the inorganic compounds of carbon dioxide, water, and sunlight are used by photoautotrophs to produce glucose, oxygen, and water.
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Maybe the most fascinating characteristic of visible light is color. Humans see a broad range of colors in visible light, and each color has its own corresponding wavelength. The color components of visible light include violet, blue, green, yellow to orange, bright red and dark red.
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There are 2 types of photoreceptors in the retina: rods and cones. The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision. ... Cones, however, work only in bright light.