Potential Of Solute
Mostrando 25-36 de 107 artigos, teses e dissertações.
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25. Growth, Water Relations, and Accumulation of Organic and Inorganic Solutes in Roots of Maize Seedlings during Salt Stress.
Seedlings of maize (Zea mays L. cv Pioneer 3906), hydroponically grown in the dark, were exposed to NaCl either gradually (salt acclimation) or in one step (salt shock). In the salt-acclimation treatment, root extension was indistinguishable from that of unsalinized controls for at least 6 d at concentrations up to 100 mM NaCl. By contrast, salt shock rapidl
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26. Water Relations of Seed Development and Germination in Muskmelon (Cucumis melo L.) 1: I. Water Relations of Seed and Fruit Development
Total water potential (ψ), solute potential, and turgor potential of field-grown muskmelon (Cucumis melo L.) fruit tissue (pericarp) and seeds were determined by thermocouple psychrometry at 5-day intervals from 10 to 65 days after anthesis (DAA). Fruit maturity occurred between 44 and 49 DAA, and seed germination ability developed between 35 and 45 DAA. Pe
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27. Agar Dish Isopiestic Equilibration Method for Controlling the Water Potential of Solid Substrates 1
Maintenance of substrate water potential in petri dishes is achieved by using vapor-pressure controlling, solute-amended agar gel discs attached to the inside of the top halves of the dishes.
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28. Comparison of Methods for Characterizing Nonideal Solute Self-Association by Sedimentation Equilibrium
We have examined in detail analytical solutions of expressions for sedimentation equilibrium in the analytical ultracentrifuge to describe self-association under nonideal conditions. We find that those containing the radial dependence of total solute concentration that incorporate the Adams-Fujita assumption for composition-dependence of activity coefficient
The Biophysical Society.
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29. Kinetics of sodium-dependent solute transport by rabbit renal and jejunal brush-border vesicles using a fluorescent dye.
The kinetics of Na-coupled solute transport by renal and jejunal brush-border vesicles in the rabbit were examined using the potential-sensitive fluorescent dye diS-C3-(5). All organic solutes known to be transported across these membranes by Na-coupled mechanisms increase the fluorescence of the dye in the presence of Na, but not K. An increase in fluoresce
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30. A high-conductance solute channel in the chloroplastic outer envelope from Pea.
The pea chloroplastic outer envelope protein OEP24 can function as a general solute channel. OEP24 is present in chloroplasts, etioplasts, and non-green root plastids. The heterologously expressed protein forms a voltage-dependent, high-conductance (Lambda = 1.3 nS in 1 M KCl), and slightly cation-selective ion channel in reconstituted proteoliposomes. The h
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31. Solvent reorganizational red-edge effect in intramolecular electron transfer.
Polar solvents are characterized by statistical distributions of solute-solvent interaction energies that result in inhomogeneous broadening of the solute electronic spectra. This allows photoselection of the high interaction energy part of the distribution by excitation at the red (long-wavelength) edge of the absorption bands. We observe that intramolecula
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32. The methanogenic archaeon Methanosarcina thermophila TM-1 possesses a high-affinity glycine betaine transporter involved in osmotic adaptation.
Methanogenic Archaea are found in a wide range of environments and use several strategies to adjust to changes in extracellular solute concentrations. One methanogenic archaeon, Methanosarcina thermophila TM-1, can adapt to various osmotic conditions by synthesis of alpha-glutamate and a newly discovered compatible solute, Ne-acetyl-beta-lysine, or by accumu
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33. An image-based reaction field method for electrostatic interactions in molecular dynamics simulations of aqueous solutions
In this paper, a new solvation model is proposed for simulations of biomolecules in aqueous solutions that combines the strengths of explicit and implicit solvent representations. Solute molecules are placed in a spherical cavity filled with explicit water, thus providing microscopic detail where it is most needed. Solvent outside of the cavity is modeled as
American Institute of Physics.
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34. Osmotic adjustment in the filamentous fungus Aspergillus nidulans.
Aspergillus nidulans was shown to be xerotolerant, with optimal radial growth on basal medium amended with 0.5 M NaCl (osmotic potential [psi s] of medium, -3 MPa), 50% optimal growth on medium amended with 1.6 M NaCl (psi s of medium, -8.7 MPa), and little growth on medium amended with 3.4 M NaCl (psi s of medium, -21 MPa). The intracellular content of solu
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35. Energetics of alanine, lysine, and proline transport in cytoplasmic membranes of the polyphosphate-accumulating Acinetobacter johnsonii strain 210A.
Amino acid transport in right-side-out membrane vesicles of Acinetobacter johnsonii 210A was studied. L-Alanine, L-lysine, and L-proline were actively transported when a proton motive force of -76 mV was generated by the oxidation of glucose via the membrane-bound glucose dehydrogenase. Kinetic analysis of amino acid uptake at concentrations of up to 80 micr
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36. Role of σB in Regulating the Compatible Solute Uptake Systems of Listeria monocytogenes: Osmotic Induction of opuC Is σB Dependent
The regulation of the compatible solute transport systems in Listeria monocytogenes by the stress-inducible sigma factor σB was investigated. Using wild-type strain 10403S and an otherwise isogenic strain carrying an in-frame deletion in sigB, we have examined the role of σB in regulating the ability of cells to utilize betaine and carnitine during growth
American Society for Microbiology.