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  • Wiley-Blackwell  (1,126)
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  • 1
    Electronic Resource
    Electronic Resource
    Biologen in unserer Zeit (1994)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 24 (1994), S. 49-63 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19940240418
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Kenntnis von kubischem Aluminiumsulfid (1963)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 325 (1963), S. 77-88 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A cubic, As-containing modification of Al2S3 has been prepared by reaction of Al + As + 4 S.Crystallographic data: cubic, a = 9.93 ± 0.01 Å; Fd3m - 07h; d20°C = 2.80 g/cm3, dx = 2.78 g/cm3.Atomic positions: 32 S atoms in 32e with x = 3/8; 16 Al-atoms in 16c; 5.33 Al atoms statistically in tetrahedral positions (8b).
    Notes: Versuche zur Darstellung von AlAsS4 lieferten statt der gesuchten Verbindung hexagonales Al2S3, wenn AlAs mit Schwefel umgesetzt wurde. Aus einem stöchiometrischen Gemenge von Al, As und 4 S dagegen bildete sich ein bisher unbekanntes, kubisches Al2S3. in dem etwa 2 Atom%% Al durch As ersetzt sind.Kristallographische Daten: Kubisch  -  Raumgruppe Fd3m  -  O7h; a = 9,93 ± 0,01 Å; d20°C = 2,80 g/cm3; dx = 2,78 g/cm3.Punktlagen: 32 Schwefelatome in 32e mit x = 3/8; 16 Aluminiumatome in Oktaederlücken (16c) bei 1/8 1/8 1/8 und 5,33 Aluminiumatome statistisch in Tetraederlücken (8b) bei 1/2 1/2 1/2.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19633250112
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  • 3
    Electronic Resource
    Electronic Resource
    Biologen in unserer Zeit (1993)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 23 (1993), S. 81-95 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19930230606
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  • 4
    Electronic Resource
    Electronic Resource
    Biologen in unserer Zeit 1/93 (1993)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 23 (1993), S. 1-16 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19930230119
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal conductivity of diatomic gases: Liquid and gaseous states (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 367-372 
    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: After an extensive literature survey the experimental thermal-conductivity data for twelve diatomic gases were utilized to produce an accurate and expedient means of predicting values over extensive ranges of temperature and pressure. Plotting values of k* against TR on logarithmic coordinates produced similarities pointing to the existence of corresponding states behavior for this family of substances with the exception of hydrogen. Because hydrogen cannot be included in a correlation generalized for the diatomic gases, it has been eliminated from this study. Based on atmospheric pressure data, ratios of k*/k*Tc produced a unique relationship with reduced temperature. To include the effect of pressure, residual thermal conductivities were correlated with density for nitrogen and oxygen, the only substances for which high-pressure data exist. These relationships enabled the determination of the thermal conductivity at the critical point. When the value kc = 8.55 × 10-5 cal./sec. cm. °K. for nitrogen was used, au extensive reduced thermal-conductivity correlation was constructed against reduced temperature for parameters of constant reduced pressure. This chart, extending to reduced pressures of 100 and to reduced temperatures of 85, is recommended for the diatomic gases in their gaseous and liquid states.The developed correlation reproduces experimental nitrogen data to within 1.39%. For the other diatomic gases experimental agreement extends from 1.00 to 3.20%. Such agreement indicates that this correlation is more reliable for the diatomic gases than are other generalized plots presented in the literature.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050322
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  • 6
    Electronic Resource
    Electronic Resource
    Reduced density correlation for hydrogen: Liquid and gaseous states (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 155-158 
    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 available experimental density data for hydrogen have been complied to produce a reduced density correlation for the liquid and gaseous states. This investigation has utilized fifty-seven sources of data, extending from the early studies of Amagat (1880) to the recent contributions of Johnston, Keller, and Friedman (1954).Based on the concept of a reduced density, a correlation for hydrogen has been developed ranging in temperature from the melting point (14°K.) to 3,300°K. and in pressure as high as 2,550 atm. This correlation provides continuity between the liquid and gaseous phases; whereas existing equations of state fail to describe the experimental behavior in the transitional region, particularly near the critical point.Four hundred and eighty-five experimental points covering the entire region were checked to establish the reliability of this correlation, which reproduced the experimental data to within 0.49%.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050206
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  • 7
    Electronic Resource
    Electronic Resource
    Disintegration of microorganisms in an industrial horizontal mill of novel design (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 19 (1977), S. 1523-1534 
    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 continuous high-speed horizontal colloid mill of novel design for use in the microbiological and food industries was tested for the disintegration of cells of Saccharomyces cerevisiae and Candida utilis. The mill consists of a horizontal vessel with round or oval cross sections fitted with a high-speed longitudinal agitator shaft on which are mounted disk agitators, alternating radially and obliquely to the shaft. The mill is partly filled with freely moving grinding elements which, during a continuous operation, are maintained in the vessel by a vibrating annular slot separator. Highly efficient cooling is provided by circulation of cooling fluid through a jacket surrounding the vessel as well as through the agitator shaft and disks. The radial agitator disks impart a radial motion to the grinding elements, while the oblique disks give rise to the axial movement of a substantial part of the elements. The crossing of paths thus achieved gives the mill a very high efficiency. Using a mill of 20 liter nominal capacity, the effects of agitator design, agitator speed, flow rate, and concentration of the cell suspension on the disintegration efficiency and heat production were studied. Ninety per cent of S. cerevisiae cells in a 15% suspension could be broken at a residence time of 2.5 min. The temperature rise did not exceed 8° C. The corresponding figure for C. utilis was 84%. The maximal flow rate was 400 liter/hr. Extrapolation indicates that available industrial mills of 300 liter capacity based on the same design can handle flows of 2000 liter/hr.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260191009
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  • 8
    Electronic Resource
    Electronic Resource
    Solid State NMR spectroscopy in polymer scienceMost of the work reported here has been done in the Nmr laboratory of the Max Planck Institute for Polymer Research. We acknowledge the con-tributions of Prof. Dr. Y. Yang and Dipl.-Chem. M. Schuster (Fig. 10), and Dipl.-Chem. P. Blümler (Fig. 13) and thank Mr. M. Hehn, Mr. F. Keller and Dipl.-Ing. H. Raich for taking care of the spectrometers. The financial support of the Deutsche Forschungsgemeinschaft is gratefully acknowldged. (1990)
    Weinheim : Wiley-Blackwell
    Advanced Materials 2 (1990), S. 72-81 
    Details
    ISSN: 0935-9648
    Keywords: CPMAS/Off-MAS ; Inverse Hole Burning ; Polymer Morphology ; Reorientation Dynamics ; Molecular Order ; NMR Imaging ; 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 properties of solid polymers are determined to a large extent by the structure, order, and dynamics of the molecules which make up the polymers on a molecular scale as well as by the morphological domain structure involving the size and type of crystalline, amorphous and interfacial phases. Solid state NMR spectroscopy is a method particularly suited to the investigation of the properties of individual molecules since their resonance frequency depends on the structure and on the orientation of a molecular segment in the magnetic field. In addition, morphological aspects can be studied by following the spin diffusion between individual phases. This review covers NMR techniques devised recently to address such polymer specific questions.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19900020203
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  • 9
    Electronic Resource
    Electronic Resource
    Amino-thieno[2,3-c]pyrazole und Amino-thieno[2,3-b]pyrrole (1995)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 337 (1995), S. 472-477 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Amino-thieno[2,3-c]pyrazoles and Amino-thieno[2,3-b]pyrrolesThe synthesis of thieno[2,3-c]pyrazoles and thieno[2,3-b]pyrroles is described. From the dithioliumsalt (1) and potassium hydroxide the potassium-(2,2-dicyan-1-methylthio-ethen-1-yl)-thiolate (2) is formed. This reacts with hydrazine hydrate to form the 3-amino-5-thioxo-pyrazol-4-carbonitrile (3) S-Alkylation with α-chlorocarbonyl compounds yielding (6a-c) leads via Thorpe-Ziegler-cyclization to 3,4-diamino-thieno[2,3-c]pyrazoles (9) if the position 1 is alkylated (8). Acetyl acetone yields 2-mercapto-pyrazolo[1,5-a]pyrimidine (5). After S-alkylation (10a-d) are immediately cyclized to thieno [2′,3′:3,4]pyrazolo[1,5-a]pyrimidine (11a-d). The ketone (6a) can be cyclized to the pyrazolo [5,1-b]thiazole (12). 3 reacts with oxalyl chloride to form the 2,3-dioxo-6-thioxo-imidazo[1,2-b]pyrazole (13) of which S-phenacyl derivative (14) because the NH-proton cannot be cyclized. The 5-amino-3,4-dicyano-pyrrol-2-thiolate (16) shows the analogous behaviour. The S-alkylation is followed by cyclization, and 3,5-diamino-thieno[2,3-b]pyrroles (18a-b) arise. Reaction of 5-amino-2-alkylthio-pyrrol-3,5-dicarbonitrile (17) with acetyl acetone provides pyrrolo[1,2-a]pyrimidine (20a-c) which can be cyclized to form thieno[3′,2′:4,6]pyrimidines (21a-c) very easily.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.199533701101
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  • 10
    Electronic Resource
    Electronic Resource
    Chiral polymethine dyes. Part 6.Presented in part at the Third Symposium on Iminium Salts, held at Rechenberg, Germany, September 17-19, 1997 Synthesis, absolute configuration, UV/Vis spectroscopic, and chiroptical properties of Chiral Tri- and Pentamethinium Cyanine Dyes with 1,2,3,4-tetrahydro-3,6-dimethylquinolyl end groups (1998)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 340 (1998), S. 513-529 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Starting with monochiral 1,2,3,4-tetrahydro-3,6-dimethyl quinoline 14a,b, (Schemes 1 and 2), we have synthsized the new chiral, symmetrical and unsymmetrical, tri- and pentamethinium streptocyanine dyes 2a, (Scheme 8), 4a, (Scheme 5), and 5a,b, (Scheme 4), resp. 9a, (Scheme 6), 10a,b, (Scheme 4), and 11a, (Scheme 7) with one or two stereogenic centers in the two heterocyclic end groups. The absolute configuration of 14a,b, and thus the absolute configuration of all monochiral polymethinium dyes derived from 14a,b, has been determined by a single-crystal X-ray analysis of its 4-bromobenzenesulfonyl derivative 17a, (Scheme 1 and Fig. 1). The UV/Vis spectroscopic and chiroptical properties of the new polymethinium dyes have been studied for the first time and compared with that of similar streptocyanine dyes synthesized earlier (Tables 1 and 2) in order to find possible correlations between chiroptical properties and molecular structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19983400604
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