
	Where results make sense

Topic: Photosynthetic

Related Topics

Pine

North America

POA

In the News (Sun 29 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Treatment of photographic processing effluents using photosynthetic sulfur bacteria - Patent 4135976
		In all these cases the photosynthetic sulfur bacteria can be applied either in their biologically active form, a state of cells in which the bacteria can grow or proliferate actively, or inactive form, a state of cells in which the bacteria can not grow or proliferate actively or are incapable of cell division.
		Photosynthetic sulfur bacteria are a kind of photosynthetic bacteria, which can grow under anaerobic conditions utilizing mainly reductive sulfur compounds as the sources of the reducing power required for carbon dioxide assimilation and photophosphorylation in the light.
		It is important for the biological activity of the photosynthetic sulfur bacteria for the environmental chemical composition to be suitable for the biological activity for the bacteria and also the hydrogen ion concentration of the environment be in a weakly alkaline region.
	www.freepatentsonline.com /4135976.html (6579 words)

	The paper
		The photosynthetic membrane is composed mainly of glycerol lipids and protein.
		The photosynthetic apparatus of cyanobacteria is similar to that of chloroplasts.
		Anoxygenic photosynthetic bacteria depend on bacteriochlorophyll, a family of molecules that are similar to the chlorophyll, that absorb strongly in the infrared between 700 and 1000 nm.
	www.life.uiuc.edu /govindjee/paper/gov.html (12489 words)

	Quantum Biology of the PSU (Site not responding. Last check: 2007-10-19)
		Photosynthetic organisms, i.e., plants, algae and photosynthetic bacteria, have developed efficient systems to harvest the light of the sun and to use the light energy to drive their metabolic reactions, such as the reduction of carbon dioxide to sugar.
		Chlorophyll molecules exist in slightly different chemical structures in various photosynthetic organisms, as chlorophyll a or b in plants or algae, and as bacteriochlorophyll a (BChl-a) or b in photosynthetic bacteria.
		Kinetics of excitation migration and trapping in the photosynthetic unit of purple bacteria.
	www.ks.uiuc.edu /Research/psu/psu.html (731 words)

	Photosynthetic carbon reduction
		Matching the rate of photosynthetic electron transport to the capacity of the PCRC is also important for the same reason.
		There are other important changes in the stroma that occur as a result of photosynthetic electron transport which are needed for the enzymes of the PCRC to operate efficiently, especially an increases in pH and Mg concentration.
		This requires the photosynthetic electron transport reactions to be flexible in the ratio of ATP to NADPH produced which is accomplished through cyclic or pseudocyclic phosphorylation.
	www.wisc.edu /biotron/Sharkey/Courses/Biochem621/CHAPTER.html (6981 words)

	Photosynthetic Antennas & Reaction Centers
		Some types of photosynthetic organisms have two different reaction center complexes that work together in tandem, with the reduced acceptors of one photoreaction (photosystem 2) serving as the electron donor for the other center (photosystem 1).
		Other types of photosynthetic organisms contain only a single photosystem, which in some cases is more similar to photosystem 2 and in other cases to photosystem 1 of the oxygen-evolving organisms.
		The reaction center complexes from the anoxygenic purple photosynthetic bacteria are the best understood of all photosynthetic reaction centers, from both a structural and a functional point of view (1,2).
	photoscience.la.asu.edu /photosyn/education/antenna.html (2475 words)

	TWO PARAMETERS OF PHOTOSYNTHETIC ACTIVITY OF SIBERIAN CONIFERS (RUSSIA)
		Maximal photosynthetic rate of individual species of plant canopy is characterized by the values of maximal daily rate of their photosynthesis determined by field experiments.
		Peculiarities of carbon dioxide gas exchange of common pine (Pinus sylvestris L.) and Siberian spruce (Picea obovata Ledeb.) were studied in 1997 and 1999 in the forest stand, planted with two-year-old saplings in 1985 in the suburb of Irkutsk.
		Two vegetation seasons differing in weather conditions were selected for the analysis: anomalously early warm vegetation period of 1997 and vegetation period of 1999, close to the first one in terms of warmth, but with low spring level of soil moisture and summer drought (Suvorova et al., 2002).
	www.acadjournal.com /2005/v15/part2/p2 (1402 words)

	Chapter 1 - Biological energy production
		Although photosynthetic energy capture is estimated to be ten times that of global annual energy consumption, only a small part of this solar radiation is used for photosynthesis.
		In practice, however, the magnitude of photosynthetic efficiency observed in the field, is further decreased by factors such as poor absorption of sunlight due to its reflection, respiration requirements of photosynthesis and the need for optimal solar radiation levels.
		The use of microalgae as sources of liquid fuels is an attractive proposition from the point of view that microalgae are photosynthetic renewable resources, are of a high lipid content, have faster growth rates than plant cells, and are capable of growth in saline waters which are unsuitable for agriculture.
	www.fao.org /docrep/w7241e/w7241e05.htm (1910 words)

	Photosynthetic pigment - Wikipedia, the free encyclopedia
		A photosynthetic pigment or antenna pigment is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy necessary for photosynthesis.
		Green plants have five closely-related photosynthetic pigments (in order of increasing polarity):
		Photosynthetic archaea (the halobacteria) use the pigment bacteriorhodopsin which acts directly as a proton pump when exposed to light.
	en.wikipedia.org /wiki/Photosynthetic_pigment (334 words)

	Botany online: Photosynthesis - Photosynthetic Membrane
		This is not only true for photosynthetic reactions but also for those of the respiratory chain and for the enzymes located within the purple membrane of Halobacterium halobium (an archaebacterium using light energy for the production of ATP without an electron flow).
		Several chlorophyll-binding proteins of the photosynthetic membranes of different systematic groups (angiosperms, gymnosperms, algae, bacteria) have been isolated and characterized.
		In 1985 was the structure of the photosynthetic reaction centre's protein subunits determined.
	www.biologie.uni-hamburg.de /b-online/e24/24d.htm (2267 words)

	Chapter 2 - Energy conversion by photosynthetic organisms
		Photosynthetic mechanisms which occur within plant photosynthetic membranes are schematically presented in Figure 2-1.
		Photosynthetic bacteria are also capable of reducing electron carriers such as NAD, via a linear reaction similar to the electron transmission which occurs during plant photosynthesis (Figure 2-2).
		Photosynthetic bacteria however have the potential to eliminate requirements for such large batteries for solar collection.
	www.fao.org /docrep/w7241e/w7241e06.htm (2714 words)

	CT 7/97 Industrial-size photobioreactors
		It is expected that, in the future, photosynthetic microorganisms will play a larger role than higher plants in photosynthetic carbon dioxide fixation because they have higher photosynthetic rates per unit biomass and, if optimized, can be cultivated in a compact space (5).
		In most of the growth kinetics and photosynthetic cell growth models, specific rates during the exponential growth phase are used as growth parameters (12).
		Many photosynthetic cells have no cell wall, and some are mobile or filamentous, making them fragile and sensitive to shear stress.
	pubs.acs.org /hotartcl/chemtech/97/jul/ind.html (4366 words)

	JGI Bradyrhizobium sp. BTAi1 Home
		Photosynthetic activity plays a key role in symbiosis by furnishing energy, which can be used for biological nitrogen fixation [4,5].
		Furthermore, some photosynthetic bradyrhizobial strains produce the carotenoid canthaxanthine, which is used in the agro-alimentary, pharmaceutic and cosmetologic industries for its coloring and photo-protective properties [7].
		Btai1 genome to that of the photosynthetic Bradyrhizobium sp.
	genome.jgi-psf.org /draft_microbes/bra_b/bra_b.home.html (541 words)

	BioMed Central \| Full text \| Regulation of gene expression by photosynthetic signals triggered through modified ...
		However, the photosynthetic electron transport chain and chloroplast metabolism have evolved as patchworks composed of nuclear and plastid-encoded proteins and depend on coordination of gene expression between compartments.
		Photosynthetic activity and metabolism depend on the stoichiometrical assembly and regulated interaction of nuclear and chloroplast encoded proteins [31].
		Chlorophyll fluorescence analysis showed that the acclimation was insufficient to protect the photosynthetic membrane in low CO The low quantum yield of PS-II (Table 2) demonstrates even stronger photosynthetic impairment than in wt.
	www.biomedcentral.com /1471-2229/6/15 (6812 words)

	Photosynthetic electron transport
		Photosynthetic electron transport occurs in (or across) the thylakoid membranes of the interior.
		Clearly, one set of reactions (which we now call photosynthetic electron transport) harvests light and produces an intermediate reductant (which we now know is NADPH) and another set of reactions (the RPPP) uses the reductant to reduce CO Of course, CO is the common natural Hill reagent.
		A low rate of photosynthetic oxygen evolution may stem from some cells that are conducting photosynthesis at a normal rate being mixed with other cells incapable of evolving oxygen.
	www.bio.fsu.edu /courses/bot-4503/photo-electron.htm (7411 words)

	Photosynthetic Bradyrhizobia from Aeschynomene spp. Are Specific to Stem-Nodulated Species and Form a Separate 16S ...
		of the purple nonsulfur photosynthetic bacteria (17, 42).
		of the photosynthetic activity of this strain (17, 26, 27).
		Genetic evidence for the presence of bacterial photosynthetic genes in Aeschynomene stem-nodulating bradyrhizobia.
	aem.asm.org /cgi/content/full/65/7/3084 (4722 words)

	Photosynthesis - Wikipedia, the free encyclopedia
		Cyanobacteria contain thylakoid membranes very similar to those in chloroplasts and are the only prokaryotes that perform oxygen-generating photosynthesis, in fact chloroplasts are now considered to have evolved from an endosymbiotic bacterium, which was also an ancestor of and later gave rise to cyanobacterium.
		Early photosynthetic systems, such as those from green and purple sulphur and green and purple non-sulphur bacteria, were anoxygenic using various molecules as electron donors.
		The endosymbiotic theory suggest that photosynthetic bacteria were ingested by early eukaryotic cells to form the first plant cells.
	en.wikipedia.org /wiki/Photosynthesis (3542 words)

	Photosynthetic Life - Description (Site not responding. Last check: 2007-10-19)
		Photosynthesis is among the most important of all biochemical processes: it is the basis for most terrestrial food chains, is the ultimate source of the fuel energy in oil and coal, and is responsible for the origin and maintenance of oxygen in the atmosphere (although not all photosythesis generates oxygen).
		Photosynthetic Life will cover the full range of photosynthetic organisms, from prokaryotes to plants, with the goal of examining the interaction between evolutionary history, biochemical and developmental capabilities and limitations, and the ecological role of each group.
		The second portion of the course will move on to the photosynthetic eukaryotes, studying each major group of photosynthetic eukaryotes ("algae"), as well as non-photosynthetic relatives of these organisms.
	www.life.umd.edu /labs/delwiche/PSlife/Description.html (315 words)

	BioMed Central \| Full text \| Exploring photosynthesis evolution by comparative analysis of metabolic networks between ...
		The average clustering coefficients, the average path lengths and the diameters of both enzyme and compound nodes (Table 1) confirmed that the metabolic networks under study are scale-free and small-world networks using hypergraph model.
		The function of each enzyme module in chloroplast and photosynthetic bacteria was classified using the classification scheme proposed in KEGG which includes nine major pathways: carbohydrate metabolism, energy metabolism, lipid metabolism, nucleotide metabolism, amino-acid metabolism, glycan biosynthesis and metabolism, metabolism of cofactors and vitamins, biosynthesis of secondary metabolites, and biodegradation of xenobiotics.
		Moreover five pairs of these modules are very conserved among chloroplasts and photosynthetic bacteria: three pairs correspond to amino-acid metabolism, two pairs belong to carbohydrate metabolism and nucleotide metabolism respectively, all of which are related to the core metabolism.
	www.biomedcentral.com /1471-2164/7/100 (6032 words)

	PHOTOSYNTHETIC MEASUREMENTS IN HOP (HUMULUS)
		The average photosynthetic rate of 40 genotypes, including cultivars, native North American and native Yugoslavian germplasm, and breeding lines, was 16.2 μmol CO m
		The range in photosynthetic rate was between 9.0 and 22.3 μmol CO m
		A significant positive association between photosynthetic rate and yield was found for the hop cultivars.
	www.actahort.org /books/668/668_31.htm (212 words)

	Effects of Citrus Fruits as Fertilizers Using Photosynthetic Testing, Growth Rate and Leaf Area Ratio of Hedera helix
		The average increase in height, the photosynthetic properties, and the leaf area ratio of the plants applied with different extracts of the citrus fruits and citrus fruit parts were also examined.
		It was also predicted that the plants applied with all four extracts would contain the photosynthetic pigments -- chlorophyll a and chlorophyll b because both pigments are green and the color of the plants is green (Krha et al., 2005).
		This indicates that these plants contain photosynthetic pigments other than these four pigments, but the plants in the orange peel treatment, grapefruit treatment and grapefruit peel treatment may have more photosynthetic pigments than the plants in the control group and the orange fruit treatment.
	msu.edu /~sheddkat/americaneagles.htm (2221 words)

	Urban sprawl reduces annual photosynthetic production
		A study of the impact of urbanization and industrialization over the past seven years using satellites shows that annual photosynthetic productivity can be reduced by as much as 20 days in some areas where urbanization is intense, not unlike turning the lights off in a greenhouse during the growing season.
		Nighttime images from a Department of Defense satellite, which show a dramatic picture of Earth's city lights, were used to determine which areas and how much land have been converted to urban, suburban, or industrial use.
		Annual photosynthetic productivity can be reduced by as much as 20 days in areas where housing and commercial land use is very dense.
	www.eurekalert.org /pub_releases/2000-02/NSFC-Usra-2002100.php (621 words)

	Photosynthetic reaction centres of purple bacteria
		Photosynthetic reaction centres (PRCs) are membranespanning complexes of polypeptide chains and cofactors that catalyse the first steps in the conversion of light energy to chemical energy during photosynthesis.
		PRCs of photosynthetic purple bacteria consist of at least three protein subunits termed L (light), M (medium) and H (heavy); in Rhodopseudomonas viridis and Thiocapsa pfennigii, the fourhaem cytochrome c is the fourth (and the largest) protein subunit [2].
		Blankenship, R.E. and Parson, W.W. The involvement of iron and ubiquinone in electron transfer reactions mediated by reaction centers from photosynthetic bacteria.
	metallo.scripps.edu /PROMISE/PRCPB.html (1029 words)

	From light to life: an interdisciplinary journey into photosynthetic activity
		Without detailed knowledge of the structure of the photosystems and their antenna partners, the evaluation of the energy-transfer parameters has usually been based on theoretical models that comprise an energy-transfer ('hopping') rate between two chlorophylls in the antenna and the intrinsic photochemical rate of the reaction centre.
		The thylakoids comprise stacks of vesicles (the grana) that are connected by unstacked regions (the stromal lamellae), with an uneven distribution of complexes between the two regions (Fig.
		Using immunogold labelling, Reich was able to identify two of the photosynthetic complexes (PSI and the ATP synthase) in the membranes, and to visualize their high density at the grana margins.
	www.nature.com /embor/journal/v4/n8/full/embor906.html (4060 words)

	PHOTOSYNTHETIC EXCITONS
		Excitons are considered as the basic concept used by describing the spectral properties of photosynthetic pigment-protein complexes and excitation dynamics in photosynthetic light-harvesting antenna and reaction centers.
		Following the recently obtained structures of a variety of photosynthetic pigment-protein complexes from plants and bacteria our interest in understanding the relation between structure, function and spectroscopy has strongly increased.
		Together with the theoretical description of the classical conceptual approach, which mainly deals with polarization properties of the absorption and fluorescence spectra, the nonlinear femtosecond spectroscopy which is widely used for investigations now is also discussed.
	www.worldscibooks.com /physics/3609.html (365 words)

Try your search on: Qwika (all wikis)