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  • Wiley-Blackwell  (49)
Document type
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  • 1
    Electronic Resource
    Electronic Resource
    Crystallization of the reaction center from Rhodobacter sphaeroides in a new tetragonal form (1994)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 20 (1994), S. 283-286 
    Details
    ISSN: 0887-3585
    Keywords: membrane protein ; protein structure ; photosynthesis ; detergent ; pigment-protein complexes ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The reaction center from the nonsulfur purple bacteriumRhodobacter sphaeroideshas been crystallized in a new form. The crystals grew in the presence of polyethylene glycol 4000, the detergent β-octyl glucoside, and the amphiphiles heptane triol and benzamidine hydrochloride, using the sitting drop method. The space group of these crystals is tetragonal, P41(43)212, and the cell constants are a = b = 141.5 Å and c = 276.7 Å with probably 2 proteins per asymmetric unit. A native data set has been set collected to a resolution of 2.8 Å consisting of 56,332 unique reflections (50,731 with F 〉 2σ) with anRsym of 9.5%. Analysis of the diffraction data is underway using molecular and isomorphous replacement. © 1994 Wiley-Liss, Inc.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prot.340200309
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of the β-blocker betaxolol and labelled analogues by gas chromatography/mass spectrometry with selected ion monitoring of the α-cleavage fragment (m/z 72) (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 16 (1988), S. 387-392 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Low concentrations of betaxolol in blood plasma and physiological buffers were determined by selected ion monitoring of the intense m/z 72 fragment [CH2=NH—CH(CH3)2]+ formed by electron impact ionization of the O-trimethylsilyl derivative. At a mass spectrometric resolution of 3000, fewer potentially interfering peaks were seen than at low resolution. There remained a chemical interference, corresponding to 100 pg/sample, which arose during treatment of the samples. This method is more sensitive than previous ones, but it is restricted to situations where the specificity can be controlled. When the m/z 72 fragment was mass-shifted by using betaxolol appropriately labelled with deuterium or 13C, both the interference and the baseline noise were greatly reduced; concentrations of labelled betaxolol as low as 10-20 pg/sample can be determined with little difficulty.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200160176
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  • 3
    Electronic Resource
    Electronic Resource
    Radiative efficiencies and deep levels in zinc selenide (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 3 (1994), S. 199-202 
    Details
    ISSN: 1057-9257
    Keywords: Zinc selenide ; Luminescence ; Deep levels ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Although zinc selenide and related materials are promising for blue light-emitting diodes and lasers, present performance is unsatisfactory. The blue radiative efficiency at room temperature is low and the decay time of luminescence is correspondingly short. It is argued that the problem is non-radiative recombination by the Hall-Shockley-Read mechanism at deep levels and that the concentration of these levels must be high. Experimental evidence for the existence of such levels is presented. Characterisation and control of deep levels will be essential for progress in this area.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860030128
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  • 4
    Electronic Resource
    Electronic Resource
    Semiconductor lasers, G. P. Agrawal and N. K. Dutta. 2nd edn. Van Nostrand Reinhold, New York, 1993. ISBN 0 442 01102 4, £66.00. No. of pages 616 (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 4 (1994), S. 51-51 
    Details
    ISSN: 1057-9257
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860040107
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  • 5
    Electronic Resource
    Electronic Resource
    Free exciton absorption in zinc selenide (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 3 (1994), S. 137-140 
    Details
    ISSN: 1057-9257
    Keywords: Excitons ; Zinc selenide ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: We have measured the absorption spectrum of the n = 1 free exciton in ZnSe from 4.2 to 190 K. By fitting to a Lorentzian, we have found the exciton peak energy, width and oscillator strength. The values are compared with published ones, which were mainly obtained by less direct methods. The importance of the electron-hole interaction in radiative processes in ZnSe is emphasised.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860030120
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  • 6
    Electronic Resource
    Electronic Resource
    The effects of sex steroid treatments on sexual differentiation in a unisexual lizard, Cnemidophorus uniparens (Teiidae) (1986)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 187 (1986), S. 129-142 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cnemidophorus uniparens is a parthenogenetic unisexual species of lizard in which each individual develops as a female, making it a unique animal model for the study of sexual differentiation. In one study, administration of exogenous testosterone before and/or after hatching influenced the development of the gonads, the accessory reproductive ducts, the renal sex segment of the mesonephric kidney, and the femoral glands, a secondary sex character. Testosterone treatment also affected the cross-sectional area of the gonad and the proportions of cortical and medullary tissues present in the developing gonad. The oviducts and femoral glands of testosterone-treated individuals were hypertrophied; the collecting tubules of the kidney of these animals contained granules, an androgen-dependent, sexually dimorphic character in squamate reptiles. In another study, testosterone, dihydrotestosterone, or estradiol were administered to C. uniparens embryos. No treatment effects on gonadal development were detected on the day of hatching. However, estradiol, but not testosterone and dihydrotestosterone, stimulated development of the oviducts. Taken together these studies suggest that androgen aromatization may play a role in sexual differentiation in lizards.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051870202
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental almost isothermal reactor (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 1228-1231 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200631
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  • 8
    Electronic Resource
    Electronic Resource
    Growth rate of an ice crystal in subcooled pure water (1977)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 23 (1977), S. 294-303 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: New and extensive experimental data on the rate of growth of ice crystals in the a axis direction in quiescent and slow flowing subcooled pure water show conclusively that thermal natural convection is an important heat transfer mechanism controlling the growth rate. At zero and low forced velocities, steady growth is observed only when the crystals grow horizontally or upward. Steady downward growth does not occur in quiescent water. This is consistent with the physical properties of water and the phenomenon of thermal natural convection.Growth rates at high water flow rates vary as the square root of the forced velocity and the 3/2 power of the subcooling and follow the theory of Fernandez and Barduhn (1967) with the ice-water interfacial energy set at 52 mJ/m2 (52 erg/cm2).
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690230312
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  • 9
    Electronic Resource
    Electronic Resource
    New chemical engineering separation techniques, edited by H. M. Schoen, John Wiley and Son, New York. 439 pages. $14.50 (1963)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 9 (1963), S. 573-575 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690090405
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  • 10
    Electronic Resource
    Electronic Resource
    Laminar dispersion in capillaries: Part I. Mathematical analysis (1965)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 1063-1072 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Since 1953, when G. I. Taylor first considered the problem, numerous studies of the miscible displacement of fluids in capillaries have produced several approximate mathematical solutions which are purported to be valid under different conditions. Their form and ranges of applicability have been in conflict to some extent, since no exact solution is available to check these expressions.This study has resulted in exact numerical solutions to this problem with both axial and radial molecular diffusion accounted for. The range of parameters investigated is wide enough for comparison with all known analytical and empirical results and covers τ from 0.01 to 30 and NPe from 1 to 23,000. It is shown that for sufficiently large values of τ the Taylor-Aris theory is valid and thus results for all τ and NPe of any practical interest are now known.Axial molecular diffusion is significant at lower values of the Peclet number but the magnitude of NPe at which this occurs depends on the value of τ. In general, axial molecular diffusion is important for Peclet numbers less than about 100.Present results show that there is no justification for Bailey and Gogarty's empirical modification which yields an exponent of 0.541 rather than 0.50 for τ in Equations (35) and (36). Also, for the system studied here, no justification was found for the conjecture of Bournia et al. that Aris' low NPe modification may not account for axial diffusion properly.Simple expressions given by Equations (48) and (50) were developed empirically and they give with good accuracy the average concentration distribution over wider ranges of NPe and τ than previously reported expressions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690110620
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