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• Wiley-Blackwell  (111)
• 1
Electronic Resource
New York, NY [u.a.] : Wiley-Blackwell
Chirality 4 (1992), S. 240-246
ISSN: 0899-0042
Keywords: NSAID ; chirality ; enantiomers ; protein binding ; equilibrium dialysis ; fluorescent specific markers ; Chemistry ; Organic Chemistry
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: The protein binding of etodolac enantiomers was studied in vitro by equilibrium dialysis in human serum albumin (HSA) of various concentrations varying from 1 to 40 g/liter, by addition of each enantiomer at increasing concentrations. In the 1 g/liter solution, at the lowest drug levels, the (R)-form is more bound than its antipode, the contrary being observed at the highest drug levels. For higher albumin concentrations, S was bound in a larger extent than R. Using the displacement of specific markers of HSA sites I and II, studied by spectrofluorimetry, it was suggested that R and S are both bound to site I, while only S is strongly bound to site II. © 1992 Wiley-Liss, Inc.
Type of Medium: Electronic Resource
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• 2
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0951-4198
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Physics
Notes: The feasibility is reported of coupling a laser microprobe sampling system with a Fourier transform mass spectrometer (FTMS) for surface characterization. Analysis of an integrated circuit chip demonstrates capabilities for focusing the laser on a selected spot on a sample surface. Analysis of a model glass sample for which high resolution is required to separate metal ions from metal oxide ions emphasizes the advantages of coupling such a sampling system to an FTMS instrument.
Type of Medium: Electronic Resource
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• 3
Electronic Resource
New York, NY : Wiley-Blackwell
Polymers for Advanced Technologies 2 (1991), S. 161-169
ISSN: 1042-7147
Keywords: Crystalline interphase ; Interfacial polymer chain orientation ; Elastic modulus of interphase ; Stress-free temperature ; Reversible energy of adhesion ; Chemistry ; Polymer and Materials Science
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes: The aim of this third part is to analyze the structure and properties of the interfacial region between carbon fibers and PEEK as a function of different thermal conditioning treatments. First, it is shown by means of optical microscopy that the interfacial zone is not different from the bulk matrix when standard cooling conditions are used. On the contrary, a transcrystalline interphase is formed near the carbon fiber surface in systems that have been subjected to isothermal treatments. By comparison with previous results concerning the mechanical properties of the fiber-matrix interface, it appears that the interfacial shear strength decreases in the presence of a transcrystalline interphase or when the crystallization rate of PEEK increases. Moreover, it seems that the “constraint state” of the amorphous phase of PEEK near the fiber surface could also play a role in the interfacial shear strength. Secondly, a method is proposed in order to estimate the elastic modulus of crystalline interphases. It seems that this modulus is strongly dependent on the crystallization rate of the polymer. Finally, the determination of the stress-free temperature, defined as the temperature at which a longitudinal compressive stress just appears on the carbon fiber during the processing of the composites, is performed by recording the acoustic events corresponding to the fragmentation process in single-fiber composites. The results confirm that the crystallization rate and the “constraint state” of the amorphous phase of the matrix play an important role in the mechanical behavior of carbon fiber-PEEK interfaces.
Type of Medium: Electronic Resource
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• 4
Electronic Resource
Weinheim : Wiley-Blackwell
Zeitschrift für anorganische Chemie 229 (1936), S. 300-304
ISSN: 0863-1786
Keywords: Chemistry ; Inorganic Chemistry
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: Das basische Bariumchlorat bildet in wäßriger Lösung keine komplexen Bariumkationen im Sinne von E. HAYEK, sondern ist überwiegend nach folgendem Schema in Ionen gespalten: \documentclass{article}\pagestyle{empty}\begin{document}$${\rm Ba(OH)ClO}_{\rm 4} \to {\rm Ba}^{ \cdot \cdot } + {\rm OH'} + {\rm ClO'}_{\rm 4}$$\end{document} wie aus Überführungsmessungen, Bestimmungen der Gefrierpunktsdepression und der Hydroxyl-Ionenkonzentration geschlossen werden muß. In konzentrierteren Lösungen erfolgt die elektrolytische Dissoziation in geringem Maße stufenweise nach: \documentclass{article}\pagestyle{empty}\begin{document}$${\rm Ba(OH)ClO}_{\rm 4} \to ({\rm BaOH)}^ \cdot + {\rm ClO'}_{\rm 4}.$$\end{document}.
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• 5
Electronic Resource
Weinheim : Wiley-Blackwell
Zeitschrift für anorganische Chemie 130 (1923), S. 173-180
ISSN: 0863-1786
Keywords: Chemistry ; Inorganic Chemistry
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
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• 6
Electronic Resource
Hoboken, NJ [u.a.] : Wiley-Blackwell
Journal of Orthopaedic Research 5 (1987), S. 173-186
ISSN: 0736-0266
Keywords: Swelling ; Kinetic of ; Cartilage ; normal ; fibrillated ; osteoarthritic ; Weight-bearing areas ; high and low ; Biochemical composition ; correlation with ; Life and Medical Sciences
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Medicine
Notes: The nonequilibrium or kinetic swelling behavior of normal, fibrillated, and osteoarthritic (OA) (removed from total knee joint replacements) human knee joint cartilage has been measured using our isometric tensile apparatus (ITA). We found that large local variation exist in the manner with which human knee joint cartilage swells, including anisotropic effects, inhomogeneities, and dependence on local biochemical composition and pathological condition. The ITA provides three convenient biomechanical parameters - peak stress (s̰P), stress relaxation (s̰R), and diffusion coefficient (D) - to quantify the kinetics of swelling. We used these parameters to quantify and differentiate the kinetic swelling behavior of normal, fibrillated, and osteoarthritic cartilage, as well as the swelling behavior of cartilage from high and low weight-bearing areas. Also, these kinetic swelling parameters correlated very well, though by varying degrees, with such biochemical measures as collagen/proteoglycan ratio, hexosamine content/wet weight, and hydroxyproline content/dry weight, providing important insight into the mechanisms and processes involved during the course of swelling. Hence, the kinetic swelling behavior of cartilage should be used to provide important information not obtainable from equilibrium swelling studies.
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• 7
Electronic Resource
Chichester : Wiley-Blackwell
Organic Magnetic Resonance 24 (1986), S. 243-246
ISSN: 0749-1581
Keywords: 13C NMR ; 1H NMR ; Ni-Pd-Pt series ; Ni-Pd-Pt substituent effects ; Ni/Pd/Pt-induced paramagnetic shifts ; M(PEt3)2X substituents ; Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: 13C and proton NMR spectra of several arylpalladium and some arylnickel and arylplatinum complexes have been compared. The Ni(PEt3)2X and Pd(PEt3)2X substituents induce a paramagnetic shift of Cipso (of the phenyl ring) which is much larger than that induced by Pt(PEt3)2X. However, there are no significant differences along the Ni/Pd/Pt series for the ortho, meta and para positions. For the six compounds of general formula trans-[ArPdBr(PEt3)2] reported here, the mean Δ(δ)C values induced on the ArH by the introduction of the PdBr(PEt3)2 substituent are found to be 26.9 (Cipso), 7.2 (Cortho), -1.1 (Cmeta), -5.5 (Cpara), -0.03 (Hortho), -0.28 (Hmeta) and -0.38 ppm (Hpara).
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• 8
Electronic Resource
Chichester : Wiley-Blackwell
Organic Magnetic Resonance 25 (1987), S. 16-20
ISSN: 0749-1581
Keywords: 13C NMR ; 13C Relaxation Times ; Prototropic equilibria ; Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: Quaternary 13C dipole-dipole spin-lattice relaxation times are used to analyse prototropic equilibria of 2-acetylbenzimidazole (1) and 4-azabenzimidazole in DMSO-d6 solutions. For the first compound, fast exchange between the two chelated structures prevails for 13C relaxation times, whereas proton and 13C chemical shifts characterize a slow exchange. For 4-azabenzimidazole, 13C and 1H spectra do not exhibit absorptions from structures in slow exchange. Analysis of the T1 values of carbons 8 and 9 before and after isotopic exchange of the labile amino hydrogen clearly show that the major component of the equilibrium is the 3H structure.
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• 9
Electronic Resource
New York, NY [u.a.] : Wiley-Blackwell
Yeast 8 (1992), S. 117-120
ISSN: 0749-503X
Keywords: Thioredoxin ; TRX1 ; TRX2 ; genetic map location ; Life and Medical Sciences ; Genetics
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Biology
Notes: The two genes encoding thioredoxims in Saccharomyces cerevisiae, TRX1 and TRX2, map to chromosome XII and VII, respectively. From the DNA sequence of the intragenic region TRX1 is 500 bp downstream of PDC1. Tetrad analysis places TRX21·1 cM from ADE3, while a physical map of this region positions TRX2 4·5 kb downstreams of ADE3. The mapping of TRX1 adjacent to PDC1 clarifies previous results (Muller, E. G. D. J. Biol. Chem. 266, 9194-9202, 1991) that suggested a third thioredoxims gene.
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• 10
Electronic Resource
Chichester [u.a.] : Wiley-Blackwell
Journal of Raman Spectroscopy 9 (1980), S. 291-296
ISSN: 0377-0486
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology , Physics
Notes: Raman spectroscopy and microscopy have been used to study some catalysts: Mo supported on alumina. Different Mo species were found, depending upon the amount of molybdenum deposited on the carrier. At low coverages (4% wt MoO3) distorted molybdate tetrahedra were observed. Increasing the surface coverage resulted in the formation of a polymolybdate phase with octahedrally surrounded molybdenum. Additionally, ‘bulk MoO3’ appeared when amounts were above 16% wt MoO3. When the supports were washed during their preparation with aqueous NH4OH and HNO3 solutions, preferential formation of polymolybdate phase was observed. In case of washing with alkaline solution ‘free MoO3’ was also detected. Finally using the Raman microprobe MOLE, a map giving the distribution of the different species at the surface of support was obtained.