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651.
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Bis(1,2‐diselenosquarato) Metalates A series of 1,2‐diselenosquarato metalates [M(dssq)2]2– (M = Pd2+, Pt2+, Cu2+, Ni2+, Zn2+, Cd2+, Pb2+, VO2+) was available by direct synthesis from the appropriate metal salt with dipotassium 1,2‐diselenosquarate in deoxygenized water under an argon athmosphere. The copper(II)complex, [Cu(dssq)2]2–, and the oxovanadium(IV)complex, [VO(dssq)2]2–, were identified in solution by EPR spectroscopy (parameters: [Cu(dssq)2]2–: g0 = 2.073; a = –76.0 · 10–4 cm–1, a = 47.0 · 10–4 cm–1; [VO(dssq)2]2–: g0 = 1.986; a = 74.9 · 10–4 cm–1). The complexes bis(tetraphenylphosphonium)[bis(1,2‐diselenosquarato)nickelate(II)], (Ph4P)2[Ni(dssq)2], and bis(tetraphenylphosphonium)[bis(1,2‐diselenosquarato)zincate(II)], (Ph4P)2[Zn(dssq)2], were characterized by X‐ray structure analysis. The square‐planar NiII complex (Ph4P)2[Ni(dssq)2] crystallizes in the monoclinic spacegroup P21/n with the unit cell parameters a = 11.1472(8) Å, b = 15.331(1) Å, c = 14.783(1) Å, β = 94.441(1)° and Z = 2. The ZnII‐complex (Ph4P)2[Zn(dssq)2] is tetrahedral coordinated and crystallizes in the monoclinic spacegroup P21/c with the unit cell parameters a = 9.4238(1) Å, b = 18.5823(3) Å, c = 29.5309(5) Å, β = 96.763(1)° and Z = 4. 相似文献
653.
K Walpurgis M Kohler A Thomas F Wenzel H Geyer W Schänzer M Thevis 《Electrophoresis》2012,33(16):2537-2545
The analysis of the cytosolic red blood cell (RBC) proteome is negatively affected by the high intracellular amount of hemoglobin complicating the detection of low-abundant cytosolic proteins. In this study, an alternative approach for the preparation of hemoglobin-depleted RBC lysates is presented, which was established in combination with downstream 2D PAGE analysis and Orbitrap MS. Hemoglobin removal was accomplished by using HemoVoid(TM) depletion reagent, which enabled a very efficient enrichment of low-abundant proteins by simultaneously reducing the hemoglobin concentration of the sample. After defining selected sample preparation protocol characteristics including specificity/selectivity, precision and linearity, a 2D reference map (pH 4-7) of the cytosolic RBC proteome was generated and a total of 189 different proteins were identified. Thus, the presented approach proved to be highly suitable to prepare reproducible high-resolution 2D protein maps of the RBC cytosol and provides a helpful tool for future studies investigating disease- or storage-induced changes of the cytosolic RBC proteome. 相似文献
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Jianjun Xu Marco Holst Mirko Wenzel Ingo Alig 《Journal of Polymer Science.Polymer Physics》2008,46(20):2155-2165
Calorimetric studies on a series of anhydride‐cured epoxy resins, in which the epoxy oligomer is a mixture of diglycidyl ether of bisphenol‐A (DGEBA) and diglycidyl ether of poly(propylene glycol) (DGEPPG) in different mole ratios, were carried out. DGEPPG is a flexible epoxy oligomer that was used to tune glass transition temperature for the fully reacted epoxy resin. Conversion versus time curves for the systems with different DGEBA/DGEPPG mole ratios (not including the neat DGEPPG system) were found to overlap with each other in mass‐controlled reaction regime, indicating similar reactivities of epoxy groups in both epoxy oligomers. Onset of diffusion‐controlled reaction regime for different systems was estimated by fitting the conversion versus time data using a phenomenological kinetic equation, as well as from direct comparison of the conversion versus time curves. For the systems (i.e., 0, 10, and 30% DGEPPG) that vitrify during reaction, the crossover from mass‐controlled to diffusion‐controlled reaction occurs close to the onset of the vitrification, where Tg is about 25–30 K below the reaction temperature. For the system (i.e., 50% DGEPPG system) that does not vitrify during the reaction, such crossover still occurs when the Tg of the mixture reaches a value about 25 K below the reaction temperature. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 2155–2165, 2008 相似文献
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Ohne Zusammenfassung 相似文献
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Ohne Zusammenfassung 相似文献