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Connecting Proline and γ-Aminobutyric Acid in Stressed
Connecting Proline and γ-Aminobutyric Acid in Stressed

... distances of these groups become shorter, resembling to the CO2 molecule. When the abstraction occurred from 5-endo Pro no minima was found on the product side until a complete dissociation of the carboxyl group occurs (the final C1-C2 distance is 2.711 Å, and the value of the O1-C1-O2 angle is 173. ...
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1.6 Energy changes in chemical reactions

... ruthenium are adsorbed onto a thin film of titanium dioxide (TiO2) nanoparticles in contact with a redox electrolyte. The dye molecules absorb solar radiation shining on them. The resulting excited dye molecules pass on their energy by transferring electrons to the titanium dioxide, so generating an ...
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... A superscript plus or minus sign following the symbol of an element indicates an ion. A single plus sign indicates a cation with a charge of 1. (The original atom has lost one electron.) A single minus sign indicates an anion with a charge of 1. (The original atom has gained one electron.) If more ...
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The Physics, Chemistry and Perception of Colored Flames

... reactive. When this happens, they are usually called “free radicals” and are indicated using a superscript dot (in place of the zero), e.g., Cl˙ or OH˙. Because free radicals are so reactive, they usually are not found at room temperature, where they quickly combine with other atoms or molecules. Ho ...
PHOTOXIDATION PROCESSES IN PLANTS
PHOTOXIDATION PROCESSES IN PLANTS

... Practically all experiments were done with cuttings of hydrangea leaves. Other leaves when tested gave the same type of results. Attempts to use algae spread over the surface of moist filter paper were abandoned since the algae dried out too quickly under the influence of the strong light needed for ...
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... The Oxygen atom attracts electrons much more forcefully than does a Hydrogen atom. In this way, oxygen is a strongly electronegative atom. As a result the O-H bond is said to be polarized, such that one of the atoms has a partial negative charge, and the other a partial positive charge. Molecules, s ...
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... Stages of Metabolism (Catabolism) Catabolic reactions are organized as Stage 1: Digestion and hydrolysis break down large molecules to smaller ones that enter the bloodstream. Stage 2: Degradation breaks down molecules to twoand three-carbon compounds. Stage 3: Oxidation of small molecules in the ...
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... d. electrons; proton e. water molecules; oxygen Which process does not match the starting materials? a. formation of acetyl CoAcitric acid, CO2, NADH b. citric acid cycleacetyl CoA, H2O, NAD+, FAD, ADP, Pi c. electron transport and chemiosmosisNADH, FADH2, O2, ADP, Pi d. glycolysisglucose, ATP, ...
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... and raise the temperature of the water. Water’s heat capacity, the amount of heat energy required to increase its temperature, is relatively high. Large bodies of water, such as oceans and lakes, can absorb large amounts of heat with only small changes in temperature. This protects organisms living ...
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... To address the second question, our main interest was in comparing between lightsaturated versus light-limited conditions. We pooled together the two clearly light-saturated intensities (100 and 400 µmol photons . m-2 . s-1) into one group and the two clearly light-limited intensities (10 and 35 µmo ...
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Glycolysis and Gluconeogenesis - University of San Diego Home
Glycolysis and Gluconeogenesis - University of San Diego Home

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Photosynthetic reaction centre

A photosynthetic reaction center is a complex of several proteins, pigments and other co-factors assembled together to execute the primary energy conversion reactions of photosynthesis. Molecular excitations, either originating directly from sunlight or transferred as excitation energy via light-harvesting antenna systems, give rise to electron transfer reactions along a series of protein-bound co-factors. These co-factors are light-absorbing molecules (also named chromophores or pigments) such as chlorophyll and phaeophytin, as well as quinones. The energy of the photon is used to promote an electron to a higher molecular energy level of a pigment. The free energy created is then used to reduce a chain of nearby electron acceptors, which have subsequently higher redox-potentials. These electron transfer steps are the initial phase of a series of energy conversion reactions, ultimately resulting in the production of chemical energy during photosynthesis.
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