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Showing 1 to 20 of 30 for “"Thylakoids"”.
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Regulation of Electronic Excitation Energy Distribution in the Primary Photoprocesses of Photosynthesis in Thylakoids
Made available in DSpace on 2014-12-14T05:40:45Z (GMT). No. of bitstreams: 1 8004307.pdf: 8075110 bytes, checksum: 622b7d4e10ae00b6063968c8b6d64dca (MD5) Previous issue date: 1979
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Comparison of two measures of PSI electron transport in winter rye
… It was found, with a single turnover flash, that thylakoids isolated from cold grown plants have a 50% greater number of P700 oxidized than thylakoids isolated from warm grown plants. Incubation of thylakoids in the dark at 35 C did not change the number of P700 oxidized. The conversion of P700 to …
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Dietary Strategies to Influence Appetite: Effects of Oat Beta-Glucan and Thylakoids from Spinach on Satiety and Reward-induced Eating Behavior
… beta-glucan. The spinach extract containing thylakoids, the internal photosynthetic membrane of plants, was compared with a placebo. The first study, a randomized crossover trial compared the effect of IO and SO on subjective ratings of satiety, with the RTEC. Subjects consumed isocaloric …
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Differential inhibition of the plastoquinone reductase activity by weak organic acids and its relationship to the bicarbonate effect in spinach thylakoids
… been known for a long time. In formate treated thylakoids, the (Q$\sb{\rm A}\sp-$) decays show a larger slowing down after the second and subsequent flashes than after the first flash. This suggests a blockage of protonation that stabilizes Q$\sb{\rm B}\sp-$.
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Thylakoid membranes from green plants affect appetite and promote body weight loss
… used by the body, resulting in body weight gain. Thylakoids are membranes extracted from chloroplasts of green leaves. They have previously been found to prolong the lipolysis and affect food intake and body weight gain in rodents, as well as affect appetite-regulating hormones in healthy …
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ΑΛΛΗΛΕΠΙΔΡΑΣΕΙΣ ΙΟΝΤΩΝ ΚΑΙ ΠΡΟΣΑΝΑΤΟΛΙΣΜΕΝΩΝ ΘΥΛΑΚΟΕΙΔΩΝ ΚΥΑΝΟΒΑΚΤΗΡΙΩΝ
… CELLS, CONTAINING SEALED AND PROPERLY ORIENTED THYLAKOIDS, CAPABLE OF COUPLED ELECTRON TRANSPORT TO POST-PHOTOSYSTEM I, ELECTRON ACCEPTORS. THE IONIC CONTROL OF PHOTOELECTRON TRANSPORT OPERATES VIA PROCESSES SUCH AS SCREENING AND NEUTRALIZATION OF THE STATIC NEGATIVE ELECTRIC CHARGE AT THE …
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Thylakoid membrane from spinach - effect of processing on their function as appetite suppressing ingredient
… inhibiting lipase/co-lipase. Administration of thylakoids to animals and humans reduced food intake and body weight as well as affected appetite-regulation hormones. When a product for consumers shall be formulated based on a plant extract with appetite suppressing abilities, the material must …
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Molecular genetics of triazine resistance in Senecio vulgaris L
… labelling and antibody labelling of isolated thylakoids compared to S1 populations from the parents. In addition physical characteristics of chloroplast DNA (cpDNA) and its inheritance were also studied. Resistance of groundsel seedlings to atrazine; [$^{14}$C] atrazine-binding; [$^{14}$C] …
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Effects of amino acid residue substitutions on bicarbonate function in the plastoquinone reductase in cyanobacteria
… A}\sp{-}$ in bicarbonate-depleted cells and thylakoids of Synechocystis sp. PCC 6803, showing the existence of the bicarbonate effect in cyanobacteria. Thus, this effect is present in all Photosystem II (PSII) reaction centers.
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The Mechanism of Bicarbonate Activation of Plastoquinone Reduction in Photosystem II of Photosynthesis
… II (PS II) electron transport. Depleting thylakoids of HCO$\sb{3}\sp{-}$ slows down electron transfer from the primary quinone acceptor Q$\sb{\rm A}$ to the secondary quinone acceptor Q$\sb{\rm B}$. It also blocks electron transfer from Q$\sb{\rm B}$ to the plastoquinone (PQ) pool. This …
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Studies on the Efficiency of Energy Conservation in the Initial Stages of Photophosphorylation
… be only slowly permeant. However, incubation of thylakoids in Tricine for one hour allowed enough buffer to be taken up to generate a predictable lag in the onset of ATP synthesis. When membranes so incubated were illuminated by a train of single turnover flashes, ATP synthesis began long before …
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Study on polypeptides of cyanobacterial photosystem 2
… between the sidedness of the produced thylakoids and any growth or metabolic characteristic of the organithm was found. In Synechocystis 6308 a polypeptide of 27kDa , apparently unrelated to known polypeptides of the oxygen evolving complex, was shown to disappear on trypsin treatment, …
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Η ΦΩΤΟΣΥΝΘΕΣΗ ΤΟΥ ΦΥΤΟΥ ΤΗΣ ΠΙΚΡΟΔΑΦΝΗΣ (NERIUM OLEANDER) ΚΑΙ Ο ΦΩΤΟΣΥΝΘΕΤΙΚΟΣ ΜΗΧΑΝΙΣΜΟΣ ΑΥΤΟΥ
… ON THE ULTRASTRUCTURE OF CHLOROPLAST THYLAKOIDS IN NERIUM OLEANDER, WHICH REVEAL AN INCREASE A GRANA STACKING IN THE SUMMER AND A SUBSEQUENT DECREASE OF IT DURING THE WINTER. OUR RESULTS SUGGEST THAT IN THE CASE OFNERIUM OLEANDER, LHCP(9/B)-II NOT ONLY ABSORBS THE INCIDENT RADIATION …
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Investigation of mRNA Expression of Early Light Inducible Protein (ELIP) under High Light Stress <em>Arabidopsis thaliana</em>.
… the same manner.</p> <p>It was found that mature thylakoids may not be required for <em>ELIP</em> expression, and that both photoreceptor-dependent and independent components may be involved in <em>ELIP</em> expression.</p>
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Physiological and ultrastructural effects of sterol-inhibiting fungicides on apple leaves and the apple scab fungus
… SIF, bitertanol. Twelve hours after treatment thylakoids of chloroplasts appeared swollen and irregular resulting in loss of integrity of the organelles. However, after 24 and 72 hours, thylakoids of chloroplasts of treated leaves were similar to the controls. Infection of bitertanol-treated …
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The influence of low moisture stress on the gas exchange and thylakoid activity of loblolly pine (pinus taeda) and aleppo pine (pinus halepensis)
… limitations to gas exchange were estimated. Thylakoids were extracted from both species and their activity was measured in a liquid phase O₂ electrode (Hansatech L<sup>td</sup>) as rate of O₂ consumption. Methyl Viologen (1,1’ -dimethyl -4, 4’- bipyridinium ion ) was included in the reaction …
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NOVEL ASPECTS OF ULTRASTRUCTURE IN TWO SPECIES OF CYANOBACTERIA (AGMENELLUM QUADRUPLICATUM, MASTIGOCLADUS LAMINOSUS)
… of the cell was completely surrounded by thylakoids; this appeared to be a true form of compartmentalization in a prokaryotic organism. The thylakoid membranes clearly interconnected with the cytoplasmic membrane at several locations within the cell. Some of the various intracellular …
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Characterization of the composition and activity of the photosynthetic apparatus in chloroplasts
… to 40 $\mu$E/m$\sp2$ $\cdot$ s) was about 30% in thylakoids isolated from plants grown over a ten-fold range in light intensity, 100 to 1050 $\mu$E/m$\sp2$ $\cdot$ s. Peas grown under natural sunlight were virtually indistinguishable from plants grown in growth chambers at the higher light …
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Interactions of paraquat and nitrodiphenylether herbicides with the chloroplast photosynthetic electron transport in the activation of toxic oxygen species
… Methional was added to illuminated pea thylakoids and its oxidation to ethylene was used as an indicator of hydroxyl and alkoxyl radical synthesis. Oxyfluorfenstimulation of the rate of methional oxidation was dependent on light, photosynthetic electron transport and hydrogen peroxide …
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Membrane Systems in Cyanobacteria
… membrane network has a specific architecture: thylakoids displays a rudimentary helical organization, a potential evolutionary step to the modern grana and stroma thylakoid arrangement in plant chloroplasts. Apparently, each cyanobacterial strain has a unique ultrastructure that facilitates the …
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