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  • Polymer and Materials Science  (7)
  • Life and Medical Sciences  (6)
  • Computational Chemistry and Molecular Modeling  (4)
  • Ochnaceae  (4)
Source
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Biflavonoids from Ochna calodendron
    Amsterdam : Elsevier
    Phytochemistry 35 (1994), S. 791-794 
    Details
    ISSN: 0031-9422
    Keywords: Ochna calodendron ; Ochnaceae ; biflavonoids ; calodenins. ; chalcone dimers ; lophirones ; stem bark
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)90607-1
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Tetraflavonoids of Lophira alata
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 981-984 
    Details
    ISSN: 0031-9422
    Keywords: Lophira alata ; Ochnaceae ; lophirochalcone ; lophiroflavan. ; stem bark ; tetraflavonoids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(92)80052-G
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  • 3
    Electronic Resource
    Electronic Resource
    Lophiroflavans B and C, tetraflavonoids of Lophira alata
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 3595-3599 
    Details
    ISSN: 0031-9422
    Keywords: Lophira alata ; Ochnaceae ; lophirochalcone ; lophiroflavan. ; tetraflavonoids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(92)83733-F
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tetraflavonoids of Lophira alata
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 981-984 
    Details
    ISSN: 0031-9422
    Keywords: Lophira alata ; Ochnaceae ; lophirochalcone ; lophiroflavan. ; stem bark ; tetraflavonoids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(92)80198-N
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of stereoregular polygluconamides from D-glucose and D-glucosamine (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 299-305 
    Details
    ISSN: 0887-624X
    Keywords: polygluconamides ; stereoregular polyamides ; stereoregular nylons ; chiral polyamides ; chiral nylons ; aminoaldonic acids ; sugar polyamides ; carbohydrate monomers ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two stereoregular polygluconamides, one (3) of polypeptide-type and the other (16) being a polycaproamide containing four stereocenters in the main chain of the repeating unit, have been prepared from D-glucosamine and D-glucose, respectively. The new polyamides were characterized by elemental analysis, and IR, 1H- and 13C-NMR spectroscopies. The molecular weights for 3 and 16 were estimated as 25,000 and 67,000, respectively, on the basis of viscosimetric measurements. Both polyamides display high optical activity; they are highly hydrophilic and readily soluble in water as well as in a variety of organic solvents including chloroform. Polyamide 16 is highly crystalline and yields resistant films with spherulitic texture. © 1995 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330211
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of cell-free synchronous uterine flushings and microsurgery on the development of porcine embryos in vitro (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 30 (1991), S. 100-104 
    Details
    ISSN: 1040-452X
    Keywords: Embryo ; Incision ; Zona pellucida ; Trophoblast ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Experiment I was designed to determine if cell-free synchronous uterine flushings contain an embryotoxic substance that is normally screened by the intact zona pellucida. Sixty 4-cell embryos were allocated to three treatment groups: (1) control embryos (n = 20) were cultured in Modified Kreb's Ringer Bicarbonate medium + 10% bovine calf serum (mKRB-BCS), (2) UF embryos (n = 20) were cultured in 80% mKRB-BCS + 20% sterile dialyzed uterine flushings (UF), (3) MicroUF embryos (n = 20) received a microsurgical incision in the zona pellucida and were cultured in 80% mKRB-BCS + 20% UF. Following 72 h in culture at 37°C under a 90% N2, 5% CO2, and 5% O2 atmosphere, the number of nuclei/embryo and the incidence of protrusion of the trophoblast through the zona pellucida (PTZ) were recorded. Addition of UF had no effect on embryo development. A greater (P 〉 .005) proportion of MicroUF embryos exhibited PTZ as compared to UF and control embryos. Experiment II was devised to further characterize the occurrence of PTZ in Micro porcine embryos. Thirty-three 4- to 10-cell embryos and 14 morulae were distributed across two treatments: (1) control embryos (n = 16 and 6, respectively) were cultured as described in Experiment I; and (2) micro embryos were treated similarly to MicroUF embryos in Experiment I but were cultured in mKRB-BCS only. At the onset of PTZ, embryos were immediately fixed and examined. The proportion of embryos exhibiting PTZ was greater (P 〈 .007) for Micro versus control embryos. Both the mean time to PTZ and the number of nuclei present were greater for blastocysts cultured from control as opposed to Micro morulae (P 〈 .0001 and P 〈 .0002, respectively). These results indicate that (a) cell-free synchronous uterine flushings are not detrimental to embryos with incised zonae and (b) microsurgery increases the incidence of and reduces the time to protrusion of the embryo through the zona pellucida in cultured embryos.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080300205
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  • 7
    Electronic Resource
    Electronic Resource
    Franck-Condon factors and squeezed states (1994)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 52 (1994), S. 261-264 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Similarities between the Franck-Condon effect and the concept of Squeezed States have been advanced as a conjecture in the past, or noticed as a marginal fact, without giving a full explanation of how these two important concepts are connected. In this work we outline a unifying formulation that contains as special cases both phenomena. The power of the new approach is shown in a general formula from which all particular cases can be derived. © 1994 John Wiley & Sons, Inc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560520827
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  • 8
    Electronic Resource
    Electronic Resource
    Three decades of collaboration with Hilary Koprowski (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 113 (1982), S. 1-6 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041130504
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  • 9
    Electronic Resource
    Electronic Resource
    Electrochemical study of iproniazid and its analytical determination by differential pulse polarography (1994)
    Weinheim : Wiley-Blackwell
    Electroanalysis 6 (1994), S. 491-496 
    Details
    ISSN: 1040-0397
    Keywords: Iproniazid ; Differential pulse polarography ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Iproniazid was found to be irreversibiy reduced in two steps, involving the exchange of two electrons and two protons each, by using tast polarography, normal pulse polarography (NPP), and cyclic voltammetry (CV). The rate constants of these two steps were found to be 5.8 × 10-6 and 4.2 × 10-6 and 4.2 × 10-6 cm s-1, respectively, and their corresponding diffusion coefficients 4.5 × 10-5 and 8.3 × 10-5 cm2 s-1, Also, α, the coefficient of cathodic transfer, was found to be 0.20 to 0.25 for the first peak and 0.17 to 0.15 for the second. On the basis of the electrochemical study performed, a differential pulse polarographic method for the determination of iproniazid over the concentration range of 5 × 10-7 M to 1 × 10-4 M was developed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140060522
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  • 10
    Electronic Resource
    Electronic Resource
    Oxidation der Pb-Ca-Legierungen in flüssigem Zustand (1978)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 29 (1978), S. 815-820 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Oxidation of PbCa alloys in the liquid stateThe effect of various temperatures, the composition of the alloy and the corroding atmosphere is studied with a thermobalance during the oxidation of molten PbCa alloys. The rate controlling step of the oxidation depends on the test conditions. The results obtained at 700°C are in agreement with data found in literature and according to which the oxidation increases with the Ca content; in this range calcium is subject to preferential oxidation. At 600°C and temperatures below that the addition of calcium does not only not increase oxidation but may give rise to a decrease.
    Notes: Mit einer Thermowaage wird die Wirkung verschiedener Temperaturen, der Zusammensetzung der Legierung und der Zusammensetzung der angreifenden Atmosphäre bei der Oxidation geschmolzener Pb-Ca-Legierungen untersucht. Der geschwindigkeitsbestimmende Schritt der Oxidation hängt von den Versuchsbedingungen ab. Bei 700°C bestätigen die bei der vorliegenden Untersuchung erhaltenen Ergebnisse die Literaturangaben, wonach die Oxidation bei zunehmendem Ca-Gehalt ansteigt; dabei wird das Calcium vorzugsweise oxidiert. Dagegen wird bei 600°C und darunter die Oxidation durch Zusatz von Calcium nicht nur nicht verstärkt, sondern sogar verringert.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19780291206
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