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  • Wiley-Blackwell  (118)
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Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of a polymeric, water-soluble chelator for Fe(III) (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 21 (1983), S. 381-387 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.130210511
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  • 2
    Electronic Resource
    Electronic Resource
    Self-diffusion measurements in methane by pulsed nuclear magnetic resonance (1970)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 725-729 
    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: The self-diffusion coefficient of methane has been measured from 150° to 350°K. and from 200 to 5,000 lb./sq. in. abs. At constant temperature, the density-diffusivity product is constant up to neighborhood of critical density and decreases sharply above that density. The temperature dependence of the low density data agrees with Chapman-Enskog theory. The Lennard-Jones (6-12) parameters determined from the low density data (∊/k = 130°K., σ = 3.85Å.) are in good agreement with those determined by other methods. A correlation for the self diffusion coefficient for methane has been developed which may provide predictions of other spherical nonpolar gases.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690160507
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  • 3
    Electronic Resource
    Electronic Resource
    Continuous phased culture - A technique for growing, analyzing, and using microbial cellsIssued as N.R.C. No. 10941. (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 843-851 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Continuous phased growth produces a culture in which most of the cells in the population are in the same stage of their development. The cell, thereby amplified by the size of the synchronous population, may be examined in the phased culture at any desired growth rate. Changes taking place in the cell after the cell cycle, i.e., post-cycle changes, may be examined by a modification of the procedure. Further systematic applications of the method permit a rational approach to problems of cell growth and metabolism.The phasing technique recognizes the cells as the fundamental unit for experimental investigation, and offers a great potential in the analysis of the cell throughout its cycle, a relatively unexploited field in cell physiology and fermentation. Experiments with yeasts and bacteria illustrate some of the applications and progress made so far.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260110510
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic aspects of radiorespirometry during the cell cycle of Candida utilis: Some observations in phased culture under carbon-, nitrogen-, and phosphorus-limited growthNRCC NO. 17791. (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 22 (1980), S. 137-156 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Many changes that occur in a cell during the cell cycle can be demonstrated in synchronous cultures and can reveal dimensions of cell metabolism not attainable by the study of balanced growth of asynchronous populations in batch cultures or the steady state in chemostat cultures. The release of 14CO2 from specifically labeled glucose by phased (continuously synchronized) cultures follows a characteristic pattern (profile) that depends upon the stage in the cell cycle and the period of labeling used. Successive profiles throughout a cycle showed differences that were altered under different nutrient-limiting growth conditions. Profiles obtained with glucose-1-14C, glucose-2-14C, glucose-3,4-14C, and glucose-6-14C and phased cells of Candida utilis under N-, P-, and C-limited growth demonstrated the variable character of the metabolic activity that occurred in the cells while contour changes within the profiles across the cycle indicated possible correlations with activities of the hexose monophosphate, Embden-Meyerhof-Parnas, and tricarboxylic acid cycle pathways during the cell cycle. The basis of these changes and their use as elementary parameters for study of problems of physiological changes in vivo are considered.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260220111
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  • 5
    Electronic Resource
    Electronic Resource
    Die Elektroaffinität der Metalle (1901)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 26 (1901), S. 94-103 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19010260104
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  • 6
    Electronic Resource
    Electronic Resource
    Microstructure of cold fracture sections as an indication of changes in properties of injection-molded nylon polymersThis paper was read on the program of the Division of Paint, Plastics and Printing Ink Chemistry at the National Meeting of the American Chemical Society, Chicago, Illinois, September 1958. (1960)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 3 (1960), S. 113-117 
    Details
    ISSN: 0021-8995
    Keywords: 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 , Physics
    Notes: The mechanical properties of injection-molded nylon 66, nylon 610, and nylon 6 can be altered significantly by steaming or heat-aging treatments which do not-appear to be severe enough to cause density changes which would suggest much of a shift in the ratio of crystalline to mesomorphic polymer. However, some electron microscopy studies have demonstrated that such treatments are reflected markedly in the microstructure of fracture patterns on test bars broken at -40°C. The greater the change in microstructure, the greater was the residual effect of thermal or steam aging on the shear modulus and damping characteristics of the polymer. In general, dry annealing promoted embrittlement, particularly at low temperatures. Residual effects of steaming enhanced embrittlement at -40 and 100°C. but promoted softening at room temperature. The relative stability of room-temperature properties to dry annealing was greatest for nylon 66, and to steaming for nylon 6.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1960.070030716
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  • 7
    Electronic Resource
    Electronic Resource
    The cyclone column culture vessel for batch and continuous, synchronous or asynchronous, culture of microorganismsIssued as NRCC No. 12262. (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 13 (1971), S. 865-876 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A simple inexpensive apparatus with a working volume of 10 liters of culture is described. Details of construction and procedures for operation of the cyclone column vessel are given. The vessel is self-contained, so that experimental parameters of temperature and aeration are individually controlled; homogeneous mixing and representative sampling of the culture, besides control of foam without need for antifoam, are obtained. The vessel may be used in single or multistage systems for aerobic or anaerobic cultivation of organisms in batch, chemostat, or phased cultures.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260130610
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  • 8
    Electronic Resource
    Electronic Resource
    Microencapsulation of mammalian cells in a water-insoluble polyacrylate by coextrustion and interfacial precipitation (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 29 (1987), S. 1135-1143 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A process for the microencapsulation of mammalian cells in a commercially available water-insoluble polyacrylate (EUDRAGIT RL) is described, and the effects of process parameters are outlined The polymer dissolved in diethyl phthalate was pumped along the annulus formed from two concentric needles, while the cell suspension was pumped inside the inner needle Droplets of polymer solution containing cells were blown off the end of the needles by a coaxial air stream. The droplets fell into a corn oil-mineral oil curing bath, in which the solvent was removed from the nascent capsule causing the polymer to precipitate around the cell suspension core. Capsules were washed free of oils and solvent in a fractionated plasma that allowed for quantitative transfer of capsules from the oil phase to an aqueous medium. By appropriate adjustment of the coaxial air flow rate, capsule size could be varied from 250-1000 μm, although the most convenient size was found to be 400-700 μm. Adding Ficoll 400 to the cell suspension to match the density of the suspension to the polymer solution resulted in capsules with a well-centered core but did not affect capsule strength. It appeared that increasing the polymer solution concentration or the polymer to the cell flow rate ratio resulted in an increased capsule strength, although differences in capsule size made unequivocal conclusions difficult. These capsules are of potential use as an artificial pancreas for the treatment of diabetes (with pancreatic islets) or for large-scale tissue culture and the production of bioactive products (e.g., with fibroblasts).
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260290914
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  • 9
    Electronic Resource
    Electronic Resource
    Orthogonal-acceleration time-of-flight mass spectrometer (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 155-159 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A new time-of-flight mass analyser compatible with conventional continuous ionization methods is described. A mass resolution at m/z 2000 of m/Δm〉2000 (50% valley) is predicted for the instrument which is presently being prototyped. Sensitivity advantages over scanning instruments are also predicted for this instrument.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290030511
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  • 10
    Electronic Resource
    Electronic Resource
    HPLC and NMR methods for the quantitation of the (R)-enantiomer in (-)-(S)-timolol maleate drug raw materials (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 6 (1994), S. 484-491 
    Details
    ISSN: 0899-0042
    Keywords: timolol maleate ; quantitation of enantiomers by HPLC ; quantitation of enantiomers by NMR ; optical purity ; chiral separation ; cellulose tris-3,5-dimethylphenylcarbamate (Chiracel OD-H) ; chiral solvating agents ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: HPLC and 1H-NMR methods for the quantitation of the (R)-enantiomer in (-)-(S)-timolol maleate were developed and validated. The HPLC method requires a 25 cm × 4.6 mm 5 μm Chiracel OD-H (cellulose tris-3,5-dimethylphenylcarbamate) column, a mobile phase of 0.2% (v/v) diethylamine and 4% (v/v) isopropanol in hexane at a flow rate of 1 ml/min and UV detection at 297 nm. A system suitability test was devised to verify the separation of the (R)- and (S)-enantiomers of timolol from other drug-related impurities. The NMR method requires the use of a high-field NMR spectrometer (〉360 MHz) and a chiral solvating agent, (-)-(R)-2,2,2-trifluoro-1-(9-anthrylethanol) (R-TFAE). The limits of quantitation were 0.05% and 0.2% (m/m) for HPLC and NMR, respectively. The methods were applied to the determination of the (R)-enantiomer in eight lots of raw material. The results for the two methods were in very good agreement, with results ranging from 0.1 to 4.1% (m/m) by HPLC and none detected to 4.3% (m/m) by NMR. The USP method for specific rotation was found to be unsuitable for detecting the presence of low levels of the (R)-enantiomer in (-)-(S)-timolol maleate. © 1994 Wiley-Liss, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530060607
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