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chlorophyll
chlorophyll
A Dictionary of Food and Nutrition
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2005
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© A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information)
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chlorophyll The green pigment of plant materials which is responsible for the trapping of light energy for photosynthesis, the formation of carbohydrates from carbon dioxide and water. Both α‐ and β‐chlorophylls occur in leaves, together with the
carotenoids xanthophyll and carotene. Chlorophyll has no nutritional value, although it does contain
magnesium as part of its molecule, and although it is used in breath‐fresheners and toothpaste, there is no evidence that it has any useful action.
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Natural Chlorophyll but Not Chlorophyllin Prevents Heme-Induced Cytotoxic and Hyperproliferative Effects in Rat Colon1,2
Magazine article from: The Journal of Nutrition; 8/1/2005; ; 700+ words
; ...the colonocytes, whereas addition of chlorophyll from green vegetables inhibits these...water-soluble hydrolysis product of chlorophyll that inhibits the toxicity of many planar...colonic hyperproliferation as natural chlorophyll does. Rats were fed a purified control...
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Photoinduced electron transfer between chlorophylls (al b) and fullerenes (C60/C70) studied by laser flash photolysis
Magazine article from: Photochemistry and Photobiology; 7/1/2001; ; 700+ words
; ...systems of chlorophylls (Chi) (chlorophyll-a [Chi...1992) Chlorophyll triplets and...pairs. In Chlorophylls (Edited by...Bommer (1992) Chlorophyll related pigments...medicine. In Chlorophylls (Edited by...
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Development of a Method for Chlorophyll Removal from Canola Oil Using Mineral Acids
Magazine article from: JAOCS, Journal of the American Oil Chemists' Society; 9/1/2005; ; 700+ words
; ...ABSTRACT: Because of the high level of chlorophyll-type compounds found in canola oil...study, a new method for reducing the chlorophyll-type impurities prior to the bleaching...method is based on precipitating the chlorophyll compounds with mineral acids. Concentrations...
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Chlorophyll a Fluorescence: A Signature of Photosynthesis
Magazine article from: Journal of the Torrey Botanical Society; 10/1/2005; ; 700+ words
; Chlorophyll a Fluorescence: A Signature of Photosynthesis...measurable fraction of the light absorbed by chlorophyll is re-emitted as lower-energy photons...light. The yield of fluorescence from chlorophyll associated with photosynthetic membranes...
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Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
Magazine article from: Plant Cell; 3/1/2007; ; 700+ words
; Chlorophyll is a central player in harvesting light...photosynthesis, yet the rate-limiting steps of chlorophyll catabolism and the regulation of the...Chlase), the first enzyme of the chlorophyll catabolic pathway, we expressed precursor...
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In Vivo Participation of Red Chlorophyll Catabolite Reductase in Chlorophyll Breakdown(W)
Magazine article from: Plant Cell; 1/1/2007; ; 700+ words
; A central reaction of chlorophyll breakdown, porphyrin ring opening...pheophorbide a to the primary fluorescent chlorophyll catabolite (pFCC), requires pheophorbide a oxygenase (PAO) and red chlorophyll catabolite reductase (RCCR), with...
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Identification of a Vinyl Reductase Gene for Chlorophyll Synthesis in Arabidopsis thaliana and Implications for the Evolution of Prochlorococcus Species
Magazine article from: Plant Cell; 1/1/2005; ; 700+ words
; ...and 3-vinyl chlorophyll (monovinyl chlorophyll). Almost all...contain monovinyl chlorophylls, regardless of...accumulate divinyl chlorophylls. Therefore, it...the divergence of chlorophyll types should be...
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Application of molecular orbital calculations to interpret the chlorophyll spectral forms in pea photosystem II
Magazine article from: Photochemistry and Photobiology; 3/1/2001; ; 700+ words
; ...1991) The chlorophyll-protein complexes...of algae. In Chlorophylls (Edited by...1977) Antenna chlorophyll in photosynthetic...determinants for chlorophyll in vivo. Proc...properties of chlorophylls in vivo. Theoretical...
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Energy transfer among CP29 chlorophylls: Calculated Forster rates and experimental transient absorption at room temperature
Magazine article from: Biophysical Journal; 10/1/2000; ; 700+ words
; ...orientation of CP29 chlorophylls was determined...transition energy and chlorophyll a/b affinity...of individual chlorophyll a and b ligands...redistribution among CP29 chlorophylls on solving numerically...energy donors for chlorophylls a, whereas site...composed of a chlorophyll a ...
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Canada's 1999 canola crop suffering from high chlorophyll content.
News Wire article from: Resource News International; 2/24/2000; 700+ words
; ...February 23, 2000 (RESNEWS) - High chlorophyll content in Canada's 1999 canola crop...the 1999 Canadian canola crop's chlorophyll content is higher than least year. The mean chlorophyll content for No.1 Canada canola was...
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Chlorophyll
Book article from: Plant Sciences
...green light by chlorophyll causes plants...accompanying graph). Chlorophylls are cyclic tetrapyrroles...is similar to chlorophyll b but with the...evolutionary ancestors of chlorophylls, occur in photosynthetic...Unlike other chlorophylls, bacteriochlorophylls...Enzymes of ...
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chlorophyll
Book article from: The Columbia Encyclopedia, Sixth Edition
chlorophyll , green pigment that gives...photosynthesis . Chemically, chlorophyll has several similar forms...molecular structure of the chlorophylls is similar to that of...photosynthetic cells of plants the chlorophyll is in the chloroplasts...
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chlorophyll method
Book article from: A Dictionary of Plant Sciences
chlorophyll method A method that is used for estimating the primary productivity...Experimental evidence shows that, with appropriate calibration, the chlorophyll content of the community occupying a given area can form an index of...
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Algae
Book article from: Plant Sciences
...General Morphology Glaucophyta Chlorophyll a Freshwater Unicellular flagellates Phycocyanin Rhodophyta Red algae Chlorophyll a Mostly marine Unicells, filaments...Phycocyanin Cryptophyta Cryptomonads Chlorophyll a Marine and freshwater Mostly...
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Photosynthesis
Book article from: World of Microbiology and Immunology
...complements of additional chlorophylls. Chlorophyta and Euglenophyta have chlorophyll-a and chlorophyll-b...chlorophyll-c. Rhodophyta have chlorophyll-a and chlorophyll-d. The different chlorophylls and other photosynthetic...
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