Purple Bacteria

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purple bacteria [′pər·pəl bak′tir·ē·ə]

(microbiology)

Any of various photosynthetic bacteria that contain bacteriochlorophyll, distinguished by purplish or reddish-brown pigments.

Purple Bacteria

photosynthesizing bacteria living in fresh or salt water. The bacteria contain red pigments, or caro-tenoids, which give colonies of the bacteria or accumulations of bacterial cells a dark red coloration. Carotenoids absorb energy (from the blue and green bands of the spectrum that penetrate the water to great depths) and transfer it to the bacteriochloro-phyll. Unlike green plants, sulfureous purple bacteria use hydrogen sulfide rather than water as a hydrogen donor, whereas nonsulfureous purple bacteria use organic substances. Molecular oxygen does not form during photosynthesis.

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No references found			Donohue's lab is working with purple bacteria that use photosynthesis to produce hydrogen from a combination of cellulosic feedstocks and sunlight. Bacteria may power tomorrow's energy needs by Asian News International Ian Mercer of University College Dublin, along with researchers at Imperial College London, flashed a light-absorbing protein from purple bacteria with a series of pulses lasting less than one ten-thousandth of a billionth of a second each. Living physics: from green leaves to bird brains, biological systems ... by Gaidos, Susan / Science News From Leeds University, where he graduated in biochemistry, Carr advanced to Trinity College, Oxford, researching the metabolism of purple bacteria. OBITUARY: Noel Carr by Daily Post (Liverpool, England)			purity coil purity control purity magnet purity of state Purkaev, Maksim Purkaev, Maksim Alekseevich Purkinje Cell Purkinje effect Purkinje Fiber Purkinje fibers Purkinje, Jan Evangelista Purkinje, Johannes Evangelista Purkyne, Karel purl purlieu Purlin purlin cleat purlin plate purlin post purlin roof purline puromycin Purpe purple purple and yellow Purple Bacteria purple blende purple blotch Purple Book purple boundary purple fringing Purple Gallinule purple heart Purple Heart Day Purple Heron purple lakes purple light purple lilac purple minutes purple nonsulfur bacteria purple of Cassius purple plague purple sail purple salt purple sulfur bacteria purple wire purple wood purple-top purpleheart Purpose purpose-made brick			puromycin puromycin puromycin PURP PURPA Purparty Purparty Purpe PURPL purple purple purple purple purple Purple (color) Purple (color) Purple (color) Purple (colour) Purple (colour) Purple (colour) Purple Acid Phosphatase purple amaranth purple and yellow purple anise purple apricot Purple ash Purple asparagus Purple asparagus Purple asparagus purple avens Purple Bacteria Purple Barrels purple beech Purple bird Purple bits in digital photos purple blende purple blotch purple boneset Purple Book Purple Book purple boundary Purple Car Purple cauliflower Purple cauliflower Purple cauliflower purple chinese houses Purple City Byrd Gang Purple City Kings purple clematis purple clover purple clover purple clover Purple cockle Purple Colt's-foot purple commander Purple coneflower Purple coneflower Purple coneflower Purple copper ore Purple copper ore purple cress

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