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  • 2020-2023
  • 1965-1969  (187)
  • 1945-1949
  • 1966  (187)
  • Chemistry  (187)
  • Computational Chemistry and Molecular Modeling
Datenquelle
Materialart
Erscheinungszeitraum
  • 2020-2023
  • 1965-1969  (187)
  • 1945-1949
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Studies on the formation of complex compounds between Uranyl Nitrate and transitional metal Nitrate. The system: Th(No3)4—UO2(No3)2—H2O (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 55-60 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Determination of conductance, pH, Spectrophotometry, and Refractive-Index measurements of a series of mixed solutions of uranyl nitrate and thorium nitrate, indicate the existence of one definite complex-compound in the solution namely \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Th(NO}_{\rm 3} {\rm)}_{\rm 4} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3})_2 $$\end{document} Monovariation method of NNYAR and PANDE (1), has been followed in the preparation of the solution and in the investigation of properties. Aqueous solution of the uranyl nitrate and thorium nitrate were prepared in such a way that the concentration of uranyl nitrate was kept constant, while that of thorium nitrate was varied systematically, and the physico-chemical properties recorded. When the values are plotted against the concentration of thorium nitrate curves are obtained with the specific breaks. The kink occurs at exact stoichiometric ratio of the concentrations corresponding to the compound noted above.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19660310108
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  • 2
    Digitale Medien
    Digitale Medien
    Studies on the formation of complex compounds between Uranyl Nitrate and transitional metal Nitrate. The system: La(NO3)3—UO2(NO3)2—H2O (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 61-67 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Experiments with the system Uranyl nitrate-Lanthanum nitrate-water viz., Conductance, pH, and spectrophotometry revealed the existence of the following compounds in solution. \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm (1)\,\, La(NO}_{\rm 3} {\rm)}_{\rm 3} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3} )_2 {\rm \quad\quad(2)\,\,2La(NO}_{\rm 3} {\rm)}_{\rm 3} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3})_2 $$\end{document} A set of 22 mixed solutions was prepared by following Nayar and Pande's monovariation method1. In all the solutions the concentration of uranyl nitrate was kept constant (i. e. M/200), while that of lanthanum nitrate varied systematically from 0.0M to 0.021M. The physico-chemical properties, namely conductivity, pH, and spectrophotometry were used for the investigation of complex-compounds in the above system. When these values are plotted against the varying concentration of Lanthanum nitrate two breaks were obtained in the regular curves at concentrations corresponding to the compounds having the above formulae. The results obtained by all these physico-chemical properties are in excellent agreement leading to the same conclusions.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19660310109
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  • 3
    Digitale Medien
    Digitale Medien
    Studies on the formation of complex compounds between Uranyl Nitrate and transitional metal Nitrate. The system: Zr(NO3)4—UO2(NO3)2—H2O (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 49-54 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Determination of conductance, pH, spectrophotometry, and Refractive Index of a series of mixed solutions of uranylnitrate and zirconium-nitrate indicate the existence of one definite complex compound in the solution namely: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Zr(NO}_3)_4 - {\rm UO}_2 ({\rm NO}_3)_2 $$\end{document} Monovariation method of NAYAR and PANDE has been followed in the preparation of these solutions. A set of 22 solutions was prepared. In all the solutions the concentration of uranyl-nitrate was kept constant. While that of zirconium-nitrate was varied systematically and the physico-chemical properties measured. When these values are plotted against the concentration of zirconium-nitrate, curves are obtained with the specific break. The kink occurs at the exact stoichiometric ratio of the concentrations corresponding to the compound noted above.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19660310107
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  • 4
    Digitale Medien
    Digitale Medien
    O-Phenanthroline Complexes of rare-earth perchlorates (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 348 (1966), S. 309-312 
    Details
    ISSN: 0044-2313
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Es wurden o-Phenanthrolinkomplexe des Typs [M(o-Phen)4](ClO4)3 mit M = La, Ce, Pr und Nd dargestellt. Ihre IR-Spektren werden diskutiert.
    Notizen: O-Phenanthroline complexes of four rare-earth perchlorates of the formula M(O-phen)4(ClO4)3 where M = La, Ce, Pr or Nd have been prepared and their infrared spectra discussed.
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/zaac.19663480512
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  • 5
    Digitale Medien
    Digitale Medien
    Low-sulfur proteins from α-keratins. Interrelationships between their amino acid compositions, α-helix contents, and the supercontraction of the parent keratin (1966)
    New York : Wiley-Blackwell
    Biopolymers 4 (1966), S. 905-916 
    Details
    ISSN: 0006-3525
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: S-Carboxymethyl (SCM) kerateine preparations from a range of keratins were fractionated by acid precipitation into low-sulfur (SCMKA) and high-sulfur (SCMKB) fractions. Amiono acid analyses and optical rotatory dispersion measurements on the SCMKA fractions from different keratins indicated that the proportion of α-helical material (30-64%) increased with increasing leucine and glutamic acid contents and decreased with increasing SCM-cysteine and proline contents. It is shown that these variations in α-helix contents are due mainly to differences in the conformations of the principal components of the SCMKA fractions, although there is also a smaller contribution arising from contamination with varying amounts of non helical components. The thiol + disulfide contents for the parent keratins were measured and compared with the SCM -cysteine contents of the solubilized fractions. In general the SCM-cysteine contents of the SCMKA fractions increased with increasing thiol + disulfide content of the parent keratin, but these values were not directly proportional. The extent of total supercontraction in 8M LiBr solution was measured for the parent keratins and shown to bear no significant relationship to their disulfide contents. From the extents of first-stage and total supercontractions the disulfide contents of the contractile structures in the fibers were calculated according to a model described previously and compared with the analytical values for the SCM -cysteine contents of the SCMKA and SCMKB fraction. Data for both fractions were consistent with the model in that they were in each case related to the calculated values by a constant factor. However, because of simplifying assumptions in the model, it was not possible to identity positively one or other of these protein fractions with the contractile elements in the fiber.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bip.1966.360040807
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  • 6
    Digitale Medien
    Digitale Medien
    Inhibierung der Korrosion von Kupfer in Natriumhydroxidlösungen (1966)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 17 (1966), S. 870-875 
    Details
    ISSN: 0947-5117
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Inhibition of copper corrosion in sodium hydroxide solutionsThe authors have investigated the effect of 30 organic substances on the corrosion of copper in aqueous NaOH solutions (0.2, 0.5 and 1.0 n). The following substances were found to be effective inhibitors: resorcin, phloroglucin, pyragallol, tanni, β-naphthom, m and p-aminophenol, glucose, furfural, cyclohexanon, 8-oxychinolin, hydrazine sulphate, chinalizarine, hydrochinon, sodium diethyldithiocarbamate, sodium rhodizonate, gallocyanine and acriflavine. In most cases, the inhibition effect is due to a covering layer of reaction products of metal, inhibitor and hydroxide. The decisive factor is the stability of the covering layer with the different lye concentrations.
    Notizen: Die Verfasser untersuchten die Wirkung von 30 organischen Substanzen auf die Korrosion von Kupfer in wäßrigen NaOH-Lösungen (0,2, 0,5, und 1,0 n). Als gute Inhibitoren erweisen sich Resorcin, Phologluchin, Pyrogallol, Tannin, β-Naphthol, m- und p-Animophenol, Glucose, Fufurol, Cyclohexanon, 8-Oxychinolin, Hydrazinsulfat, Chinalizarin, Hydrochinon, Natriumdiäthyldithiocarbanmat, rhodiozonsaures Natrium, Gallocynin und Acriflavin. Die Hemmwirkung beruht in den meisten Fällen auf Deckschicht-Bildung aus Reaktionsprodukten von Metall, Inhibitor und Hydroxid. Entscheidend ist die Stabilität der Deckschicht bei den verschiedenen Laugenkonzentrationen.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/maco.19660171006
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  • 7
    Digitale Medien
    Digitale Medien
    A generalized equation for computer calculation of liquid densities (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 95-99 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: A generalized equation explicitly relating reduced density to reduced temperature and reduced pressure has been developed for calculating liquid densities of pure compounds on a digital computer. The analytical formulation is based mainly on a modified corresponding states principle and the graphical correlation of Lydersen, Greenkorn, and Hougen. The calculated densities from the equation reproduce the literature data within 2% for sixty-two saturated liquids and nineteen compressed liquids.With the aid of a pseudocritical method and a generalized equation of vapor pressure, the same equation is readily applied to the estimation of liquid mixture densities. The method of Prausnitz and Gunn is chosen for the evaluation of pseudocritical constants. For fifteen binary systems, one ternary system, and one quinary system, the one hundred fifty-nine calculated densities agree with the literature data to within 3%. This method is limited to pseudoreduced temperatures less than 1.0.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690120119
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  • 8
    Digitale Medien
    Digitale Medien
    On the stability of a continuous flow stirred-tank reactor (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 1223-1225 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690120633
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  • 9
    Digitale Medien
    Digitale Medien
    Coalescence in fibrous beds (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 1045-1050 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The factors affecting the efficacy of a closely packed bed of mixed cotton and a supporting fiber (Teflon, glass, Dynel) were evaluated for oil-in-water dispersions. Several other water-organic systems were also tested. Superficial velocities ranged from 0.2 to 3.5 ft./min. Successful coalescence was attained at interfacial tensions as low as 3.5 dynes/cm. Dispersed phase viscosity was varied form 1.4 to 137 centipoise. For a mixed-fiber bed with a specific ratio of fiber species, there is an optimum bed depth for best performance. High-speed cinephotomicrographic observations at 100 × and up to 4,000 frames/sec. indicated that fiber wettability is not the most important factor for successful operation.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690120603
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  • 10
    Digitale Medien
    Digitale Medien
    Studies on complexes of Amino acid with Silver of normal and abnormal valencies. The System: Silver Nitrate - Glycine - Water (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 113-122 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Conductivity, Spectrophotometry, pH and Refractive Index of the mixed solutions of Glycine and Silver Nitrate revealed the existence of 6 complexes. Three of normal valencies at (2:1, 2:3 and 1:1) molecular ratios and three of abnormal valencies at (1:2, 1:3, 1:4). All were crystallized out except (1:4) and their shapes were found out by microscopic studies.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19660310301
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