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Topics related to "chlorophyll"

green algae
green algae Large group of marine and freshwater algae (phylum Chlorophyta). They are distinct from other algae by virtue of possessing cup-shaped chloroplasts that contain chlorophyll b, and by producing cells with flagella at some stage in their lives. Green algae range in size from microscopic s... Read more
saprophyte
saprophyte , any plant that depends on dead plant or animal tissue for a source of nutrition and metabolic energy, e.g., most fungi (molds) and a few flowering plants, such as Indian pipe and some orchids. Most saprophytes do not produce chlorophyll and therefore do not photosynthesize; they are thu... Read more
cyanobacteria
cyanobacteria or blue-green algae, photosynthetic bacteria that contain chlorophyll. For many years they were classified in the plant kingdom along with algae , but discoveries made possible by the electron microscope and new biochemical techniques have shown them to be prokaryotes more simi... Read more
leaf
leaf chief food-manufacturing organ of a plant, a lateral outgrowth of the growing point of stem. The typical leaf consists of a stalk (the petiole) and a blade—the thin, flat, expanded portion (needlelike in most conifers) that is normally green in color because of the presence of the pigmen... Read more
Julius von Sachs
Julius von Sachs , 1832-97, German botanist. A professor at the Univ. of Würzburg from 1868, he was a founder of experimental plant physiology. He demonstrated the importance of transpiration in plants and the role of chlorophyll; his researches on plant metabolism were a major contribution. He... Read more
Sir George Gabriel Stokes
Sir George Gabriel Stokes 1819-1903, British mathematician and physicist, b. Ireland, studied at Cambridge. From 1849 he was a professor of mathematics at Cambridge; he served as secretary (1854-85) and as president (1885-92) of the Royal Society. His researches, done in many fields, developed the ... Read more
Dinoflagellata
Dinoflagellata , phylum (division) of unicellular, mostly marine algae , called dinoflagellates. In some classification systems this division is called Pyrrhophyta. There are approximately 2,000 species of dinoflagellates. Most have two flagella that lie perpendicular to one another and cause them ... Read more
photosynthesis
photosynthesis , process in which green plants utilize the energy of sunlight to manufacture carbohydrates from carbon dioxide and water in the presence of chlorophyll. Some of the plants that lack chlorophyll, e.g., the Indian pipe , secure their nutrients from organic material, as do animals, and... Read more
pigmentation
pigmentation name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize their own pigments; animals either derive pigments from plant foods or synthesize them themselves. ... Read more
chelating agents
chelating agents . Certain organic compounds are capable of forming coordinate bonds (see chemical bond ) with metals through two or more atoms of the organic compound; such organic compounds are called chelating agents. The compound formed by a chelating agent and a metal is called a chelate. A ch... Read more

Encyclopedia entries related to "chlorophyll"

Chlorophyll
Encyclopedia entry from: The Gale Encyclopedia of Science Chlorophyll Chlorophyll is a green pigment contained in the foliage of plants, giving them...molecules, and ultimately of all biochemicals, in the plant. Chlorophyll is found in the thylakoid sacs of the chloroplast. The chloroplast...
chlorophyll
Book article from: The Columbia Encyclopedia, Sixth Edition chlorophyll , green pigment that gives most plants...process of photosynthesis . Chemically, chlorophyll has several similar forms, each containing...the photosynthetic cells of plants the chlorophyll is in the chloroplasts—small...
Photosynthesis
Encyclopedia entry from: The Gale Encyclopedia of Science ...plants and algae, light absorption by chlorophyll catalyzes the synthesis of carbohydrate...use bacteriochlorophyll rather than chlorophyll as a photosynthetic pigment. Van Niel...reactions use the light energy absorbed by chlorophyll to synthesize high-energy molecules...
Plant Pigment
Encyclopedia entry from: The Gale Encyclopedia of Science ...light energy as heat. In contrast, chlorophyll, phytochrome, rhodopsin, and phycobilin...themselves joined into a ring. Thus, the chlorophyll molecule can be considered as a...pyrroles. The phytol tail anchors the chlorophyll molecule to an inner membrane within...
photosynthesis
Book article from: The Columbia Encyclopedia, Sixth Edition ...carbon dioxide and water in the presence of chlorophyll. Some of the plants that lack chlorophyll, e.g., the Indian pipe , secure their...However, the vast majority of plants contain chlorophyll—concentrated, in the higher land...
Plant
Encyclopedia entry from: UXL Encyclopedia of Science ...plant is any organism that contains chlorophyll (a green pigment contained in a specialized...a food by humans and other animals. Chlorophyll: Green pigment found in chloroplasts...structures in plant cells that contain chlorophyll and in which the process of photosynthesis...
Richard Willstätter
Encyclopedia entry from: Encyclopedia of World Biography ...studied the chemical composition of chlorophyll and other plant pigments. Agifted experimentalist...work on natural products, especially chlorophyll and anthocyanins (plant pigments...investigation into the chemical nature of chlorophyll, the green pigment in plants that converts...
leaf
Book article from: The Columbia Encyclopedia, Sixth Edition ...because of the presence of the pigment chlorophyll. In many leaves, small processes called...palisade and spongy cells, rich in chlorophyll for food manufacture (see photosynthesis...into the blade). Pigments besides chlorophyll that give a leaf its characteristic...
pigmentation
Book article from: The Columbia Encyclopedia, Sixth Edition ...the exposure of the anthocyanins after the green chlorophyll pigments, which usually mask them, have decomposed...carotene operates in the synthesis of vitamins and of chlorophyll. Chlorophyll is essential for plant photosynthesis . Hemoglobin...
Alkaline Earth Metals
Encyclopedia entry from: UXL Encyclopedia of Science ...living things because it is a key component of chlorophyll. Chlorophyll is the green pigment that captures the energy of...use light to break down chemical compounds). Chlorophyll is a large molecule called a porphyrin; the magnesium...

Dictionary entries related to "chlorophyll"

chlorophyll
Book article from: A Dictionary of Biology chlorophyll Any one of a class of pigments found in all photosynthetic organisms; the most important members are chlorophyll a (see formula) and chlorophyll b , which occur in all land plants and are responsible for...
chlorophyll method
Book article from: A Dictionary of Ecology chlorophyll method A method used for estimating the primary productivity of ecosystems...Experimental evidence shows that, with appropriate calibration, the chlorophyll content of the community occupying a given area can form an index of...
Marchlewski, Leon Paweł Teodor
Dictionary entry from: Complete Dictionary of Scientific Biography ...plant pigments, including isatin and chlorophyll and its derivatives, a subject upon...Marchlewski again took up the studies of chlorophyll that had begun in England. He had already...compounds are closely related, as are chlorophyll and hemoglobin. In Cracow, he obtained...
photosystems I and II
Book article from: A Dictionary of Biology ...Each photosystem contains about 300 chlorophyll molecules that trap light energy...to a reaction centre , comprising a chlorophyll a molecule, in each photosystem. In photosystem II a chlorophyll a molecule, known as P680, utilizes...
Emerson, Robert
Dictionary entry from: Complete Dictionary of Scientific Biography ...by plant pigments (of which the green pigment chlorophyll is the most important and ubiquitous). In 1937...not by Warburg himself. 2. Quanta absorbed in chlorophyll a , chlorophyll b , and the red and blue phycobilin pigments of...
Ivanovsky, Dmitri Iosifovich
Dictionary entry from: Complete Dictionary of Scientific Biography ...the result of his interest in the chlorophyll-bearing structures (chloroplasts...study of the adsorption spectra of chlorophyll in a living leaf and in solution and demonstrated that chlorophyll in solution is quickly destroyed by...
bacteriochlorophyll
Book article from: A Dictionary of Biology bacteriochlorophyll A form of chlorophyll found in photosynthetic bacteria, notably the purple...bacteriochlorophyll b are structurally similar to the chlorophyll a and chlorophyll b found in plants; the purple bacteria contain either...
Cyanobacteria
Book article from: A Dictionary of Biology ...green bacteria contain the photosynthetic pigment chlorophyll a , plus accessory pigments called phycobiliproteins...differ from the blue-green bacteria in containing chlorophyll a and chlorophyll b , but no phycobiliproteins – a combination...
P700
Book article from: A Dictionary of Plant Sciences P700 The pigment that acts as the energy trap of photosystem I in chloroplasts . It is thought to be chlorophyll a in a special structural environment. It represents about 0.3 per cent of the total chlorophyll and absorbs light, most strongly at a wavelength of 700 nm.
plastoglobulus
Book article from: A Dictionary of Biology ...for example in ripening fruits. Plastoglobuli also occur in chloroplasts, but are masked by the green chlorophyll. When the chlorophyll breaks down as the leaves start to die in autumn, the pigmented plastoglobuli become apparent as the red...

Related newspaper, magazine, and trade journal articles from HighBeam Research

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...
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...
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...
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...
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...
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 ; Chlorophyll metabolism has been extensively studied...various organisms, and almost all of the chlorophyll biosynthetic genes have been identified...which is indispensable for monovinyl chlorophyll synthesis, has not been identified...
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...
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 ; ...Orbital Calculations to Interpret the Chlorophyll Spectral Forms in Pea Photosystem I...strength of electronic transitions of chlorophyll (Chl)-amino acid complexes were...Visible absorption and fluorescence of chlorophyll and its aggregates of solution. In...
The N-Terminal Domain of Chlorophyllide a Oxygenase Confers Protein Instability in Response to Chlorophyll b Accumulation in Arabidopsis
Magazine article from: Plant Cell; 5/1/2005; ; 700+ words ; ...protective strategy to minimize photodamage. Chlorophyll b synthesis by chlorophyllide a oxygenase...GFP fusion protein was introduced into a chlorophyll b-less chlorina1-1 mutant, chlorophyll b accumulated to almost the same levels...
Amino Acid Substitutions in Homologs of the STAY-GREEN Protein Are Responsible for the green-flesh and chlorophyll retainer Mutations of Tomato and Pepper1[W][OA]
Magazine article from: Plant Physiology; 5/1/2008; ; 700+ words ; ...annuum), there is a sharp decrease in chlorophyll content and a concomitant increase in...chromoplasts. The green-flesh (gf) and chlorophyll retainer (cl) mutations of tomato...inhibited in their ability to degrade chlorophyll during ripening, leading to the production...