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  • 1
    Electronic Resource
    Electronic Resource
    Addition of amino amides to vinyl vicinal tricarbonyls. Formation of tricyclic 3-azadethiacephams (1992)
    s.l. : American Chemical Society
    The @journal of organic chemistry 57 (1992), S. 2641-2645 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00035a019
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  • 2
    Electronic Resource
    Electronic Resource
    Addition of amino lactams to vinyl vicinal tricarbonyls. Formation of tricyclic 2-azadethiapenams and 3-azadethiacephams (1990)
    s.l. : American Chemical Society
    The @journal of organic chemistry 55 (1990), S. 5821-5823 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00310a012
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  • 3
    Electronic Resource
    Electronic Resource
    Interaction between anionic molecule and colored copolypeptide microspheres (1999)
    Springer
    Polymer bulletin 42 (1999), S. 395-401 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Tryptophan (Trp) residues within copoly(L-glutamic acid-co-L-Trp) (GAT) form a tricyclic structure when treatment with trifluoroacetic acid (TFA) and show reversible color change from yellow (above pH 8.0) to red (below pH 7.0) when the nitrogen atom in an indole ring dissociates positively in the neutral pH region. The interaction between TFA-treated GAT (GAT-T) and an anionic molecule such as warfarin was investigated using VIS and fluorescence spectrophotometry. Trp residues within GAT-T were found to interact with warfarin electrostatically besides hydrophobic interaction resulting in a color change from red to yellow. Release behavior of warfarin from GAT-T microspheres (MS) was also investigated. Binding amount and retention time of warfarin in GAT-T MS were found to be superior to those in untreated GAT MS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050481
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  • 4
    Electronic Resource
    Electronic Resource
    Conformation study on the interactions of plasma proteins with anionic lipids and heparin (1984)
    Springer
    Polymer bulletin 11 (1984), S. 305-312 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Effects of anionic lipids and heparin on the conformation of plasma proteins, such as albumin, γ-globulin, and fibrinogen were investigated by evaluating both α-helix and β-structure contents from circular dichroism (CD) spectra. Sodium dodecyl sulfate and sodium dodecylbenzenesulfonate increased the α-helix content of γ-globulin, and β-structure content of fibrinogen accompanied with decreasing α-helix content, while they stepwise disrupted the α-helix of albumin with increasing their concentration. It was concluded that the hydrophobic interaction was predominant for binding albumin, while the electrostatic interaction affected the structural changes of γ-globulin more than hydrophobic interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254265
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  • 5
    Electronic Resource
    Electronic Resource
    Stereoselective hydrolysis of amino acid esters by dipeptide catalysts and by N-decanoyl-histidine in surfactant aggregate domains (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 87-97 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rate constants of hydrolysis of the enantiomers of amino acid nitrophenyl esters by catalytic domains composed of cationic surfactant aggregates and dipeptide catalysts or Ndecanoyl-L-histidine have been determined at pH 7.30. The dipeptide catalysts shows large rate enhancement and stereoselectivity in aggregate domains. The surfactant structural effects are examined by investigation of the rate constants and stereoselectivities, and the nature of stereoselective catalysis is discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270108
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  • 6
    Electronic Resource
    Electronic Resource
    Optimum operating mode for a class of fermentation (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 625-636 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper is concerned with optimization of the operating mode of a fermentor. Combining the various modes of operation - batch, semibatch, and continuous - the operating pattern which maximizes the desired metabolic product in a single fermentor is determined by using Kelley's transformation method with Pontryagin's maximum principle. Kelley's transformation method is a device which avoids the singular situation which occurs when the usual procedure of selecting the optimal control function by the maximum principle breaks down. This is the case in the problem considered in this paper. For lysine fermentation, the best operating mode depends on the fermentor capacity and operating time. The results of this study are summarized thus: (i) when the operating time is “long enough,” optimal conditions require that continuous operation follows either semibatch and/or batch operation, and (ii) when the fermentor capacity becomes “large enough,” semibatch operation becomes important.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260200502
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  • 7
    Electronic Resource
    Electronic Resource
    Optimal control of a semibatch fermentation (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 847-864 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This work is concerned with the optimization study of the semibatch fermentation by which an amino acid is produced. The particular fermentation studied is the synthesis of lysine by the auxotrophic mutant. Applying Green's theorem to the maximization problem was proposed, and it succeeded in determining the feed rate of the substrate that maximized the production rate of the desired product.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260180607
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  • 8
    Electronic Resource
    Electronic Resource
    Complexation of cobalt ion with copolypeptide containing tryptophan treated with nitric acid (1998)
    Springer
    Polymer bulletin 40 (1998), S. 683-688 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Tryptophan within copoly(N-hydroxyethyl L-glutamine-co-L-tryptophan) treated with nitric acid (EGT-N) dissociates negatively above pH 10.5 by the electron-attractive effect of nitro groups introduced into the indole ring. The interaction between EGT-N and various metal ions was investigated using UV/VIS, ESCA, and ICP measurement. EGT-N was found to selectively form a complex with cobalt ions above pH 10.5. The formation of the cobalt ion complex of EGT-N was confirmed to be caused by the cooperative coordination of the tryptophan-introduced nitro groups and the OH groups of hydroxyethyl L-glutamine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050308
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  • 9
    Electronic Resource
    Electronic Resource
    Sedimentation study on the binding of fibrinogen or of antithrombin III with acidic polysaccharides including heparin (1990)
    Springer
    Polymer bulletin 24 (1990), S. 429-435 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The binding of fibrinogen with heparin and dextran sulfates, and of antithrombin III with heparin and dextran sulfate were investigated by sedimentation velocity method. From the measurement of fibrinogen-acidic polysaccharide systems, it was confirmed that heparin and low molecular weight dextran sulfate(DSC) forms soluble complexes with fibrinogen, though the amount bound of the latter was rather small compared with high molecular weight dextran sulfate(DSD). Antithrombin III was also found to be bound by heparin and DSC. The numbers of heparin molecules bound to one molecule of fibrinogen and antithrombin III were estimated to be 4.2 and 0.3, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00294097
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  • 10
    Electronic Resource
    Electronic Resource
    Kinetic study on the effects of acidic polysaccharides on the interaction of fibrinogen and thrombin (1980)
    Springer
    Polymer bulletin 3 (1980), S. 655-664 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Retardation effect of acidic polysaccharides on the interactions of fibrinogen with thrombin was kinetically investigated by measuring the turbidity as a measure of the concentration of fibrin polymer formed in the system. To this aim, the fibrinogenfibrin conversion curve was analyzed kinetically based on the elementary reactions, and the slope and the induction period of the conversion curve were expressed as functions of the concentrations of fibrinogen, thrombin, and polysaccharide. The strong retardation effect of dextran sulfate and heparin was quantitatively interpreted. Seven kinds of polysaccharides were examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285302
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