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  • 1
    Electronic Resource
    Electronic Resource
    Enzymic Synthesis of the Delicious Peptide Fragments in Eutectic Mixtures (1995)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 43 (1995), S. 2536-2541 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf00057a040
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  • 2
    Electronic Resource
    Electronic Resource
    A New Method for the Introduction of Recognition Site Functionality into Polymers Prepared by Molecular Imprinting: Synthesis and Characterization of Polymeric Receptors for Cholesterol (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 7105-7111 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00132a010
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  • 3
    Electronic Resource
    Electronic Resource
    Enzymic synthesis of short peptides in heterogeneous mixtures of substrates (1993)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 115 (1993), S. 3348-3349 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00061a051
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  • 4
    Electronic Resource
    Electronic Resource
    Enzyme Catalysis in Multiphase Systems: Direct Determination of Water Distribution (1993)
    [s.l.] : Nature Publishing Company
    Nature biotechnology 11 (1993), S. 1299-1301 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] The distribution of water and the formation of microphases during the synthesis of octyl octanoate and the hydrolysis of triolein catalyzed by immobilized lipase have been directly monitored in real time using confocal laser ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt1193-1299
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  • 5
    Electronic Resource
    Electronic Resource
    Enzymatic catalysis in heterogenous mixtures of substrates: The role of the liquid phase and the effects of “Adjuvants” (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 43 (1994), S. 1016-1023 
    Details
    ISSN: 0006-3592
    Keywords: biocatalysis nonaqueous ; peptide synthesis ; eutectic mixtures ; subtilisin ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The physicochemical mechanism of protease-catalyzed peptide synthesis in heterogenous etuectic mixtures of substrates has been examined by a combination of microscopic techniques. Using a number of model reactions of dipeptide amide synthesis, it was determined that liquid phase catalysis was mostly, if not exclusively, responsible for the observed conversion of substrates. Furthermore, the formation of liquid or semiliquid eutectics was an important requirement for the occurrence of those reactions where both substrates were solids in the pure state. The addition of small quantities of hydrophilic solvents (adjuvants) often resulted in significat improvements in the rates and yields of the reactions. This was due to the ability of these adjuvants to promote the formation of eutectics, thereby increasing the proportion, as well as affecting the composition the properties, as well as affecting the composition and properties of the liquid phase. © 1994 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260431104
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  • 6
    Electronic Resource
    Electronic Resource
    Protease-catalyzed synthesis of oligopeptides in heterogenous substrate mixtures (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 43 (1994), S. 1024-1030 
    Details
    ISSN: 0006-3592
    Keywords: peptide synthesis ; eutectic mixtures ; bioactive peptides ; proteases ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A systematic study of enzymatic peptide synthesis in heterogeneous substrate mixtures was carried out, with the aim of establishing the preparative scope of this methodology. Semiliquid eutectics were obtained with various combinations of neutral, acidic, and basic amino acid derivatives, in the presence or absence of adjuvants. A range of serine cysteine, and metalloproteases readily catalyzed the formation of the required dipeptides under these conditions. The synthetic usefulness of the approach was demonstrated by the sequential and convergent synthesis of derivatives of a number of bioactive di-, tri-, and pentapeptides, including aspartame, sweet lysine peptide, kyotorphin amide, ACE-inhibiting and -immunoactive tripeptides, and Leu-enkephalin amide, with overallyields of 21% to 84% and productivities of 0.13 to 0.75 g/g being obtained. © 1994 John Wiley & Sons, Inc.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260431105
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  • 7
    Electronic Resource
    Electronic Resource
    Spatially functionalized polymer surfaces produced via cell-mediated lithographyWe thank MAFF and BBSRC for financial support. (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 751-755 
    Details
    ISSN: 0935-9648
    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
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970090916
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  • 8
    Electronic Resource
    Electronic Resource
    Induction of catalytic activity in proteins by lyophilization in the presence of a transition state analogue (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 57 (1998), S. 211-215 
    Details
    ISSN: 0006-3592
    Keywords: protein ; conformational memory ; organic solvent ; molecular imprinting ; enzyme ; catalysis ; transition state analogue ; bovine serum albumin ; β-lactoglobulin ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The induction of catalytic activity in proteins by lyophilization in the presence of a transition state analogue (biomolecular imprinting) has been attempted. It was shown that proteins which were freeze-dried with n-isopropyl-4-nitrobenzyl-amine (a transition state analogue for the reaction of dehydrofluorination of 4-fluoro-4-[p-nitrophenyl] butan-2-one) displayed higher β-elimination activity as compared to their-non-imprinted counterparts. It was also found that native bovine serum albumin has a high dehydrofluorination activity towards the above substrate with kinetic parameters rather similar to those of a catalytic antibody prepared by Shokat et al. (1989). A comparison of the kinetic parameters determined in this study with those obtained for analogous catalytic antibodies and imprinted polymers was made. © 1998 John Wiley & Sons, Inc. Biotechnol. Bioeng. 57: 211-215, 1998.
    Additional Material: 3 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Enzymatic transformations in supersaturated substrate solutions: I. A general study with glycosidases (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 60 (1998), S. 190-196 
    Details
    ISSN: 0006-3592
    Keywords: enzymes ; glycosidases ; glycosides ; supersaturated solutions ; plasticizers ; ethylene glycol ; glycerol ; acrylates ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The results of an initial study of enzymatic catalysis in metastable supersaturated solutions of carbohydrates are presented. It has been shown that such solutions, formed in the presence of small amounts of water and alcohol as plasticizers, are sufficiently stable under ambient conditions to enable enzymatic transformations of substrates. A partial phase diagram for a system consisting of glucose, water, and (poly)ethylene glycol was constructed to identify the regions which are most suitable for biotransformations. It was confirmed that the glass transition in this system occurred below the reaction temperature at any given composition of the constituent components. Several glycosidases were found to be catalytically active in this medium and the activity of β-glucosidase from almond was determined at several compositions of the reaction mixture and related to the corresponding regions of the phase diagram. The synthetic utility of the system was illustrated by glucosylation of several α,ω-alkyldiols, short-chain polyethylene glycols, and hydroxyalkyl and glyceryl monoacrylates. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 60: 190-196, 1998.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Enzymatic transformations in supersaturated substrate solutions: II. Synthesis of disaccharides via transglycosylation (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 60 (1998), S. 197-203 
    Details
    ISSN: 0006-3592
    Keywords: enzymes ; glycosidases ; transglycosylations ; supersaturated solutions ; glycosides ; disaccharides ; synthesis ; regioselectivity ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Enzymatic transglycosylation in supersaturated solutions of substrates was investigated using crude glycosidase preparations from barley, snail, and coffee beans. It was shown that the use of supersaturated glycoside solutions as media for transglycosylation reactions offers considerable advantages over conventional aqueous systems. These advantages include higher yields, more efficient use of the donor glycosides and improved volumetric productivity, especially in the case of poorly water-soluble substrates. The regioselectivity of the glycosylation was not significantly affected by high concentrations of acceptor glycosides. It was also shown that the regioselectivity of transfer could be directed towards secondary hydroxyl groups by the use of methyl 6-O-acetyl-α-galactopyranoside as acceptor. The value of these approaches was demonstrated by the synthesis of methyl 3- and 4-O-β-D-galactopyranosyl-α-D-galactopyranosides and methyl 3-O-β-D-galactopyranosyl-α-L-fucopyranoside on a preparative scale. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 60: 197-203, 1998.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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