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Digitale Medien

Purification and preliminary characterization of five serine proteinases produced by Brevibacterium linens (1990)

HAYASHI, K. ; CLIFFE, A. J. ; LAW, B. A.

Oxford, UK : Blackwell Publishing Ltd

International journal of food science & technology 25 (1990), S. 0

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ISSN: 1365-2621

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Five proteinases were purified from culture filtrate of Brevibacterium linens by a series of column chromatography and found to be homogeneous by polyacrylamide gel electrophoresis. All appear to be serine proteinases, being inactivated by phenyl-methylsulphonyl fluoride and not by EDTA or p-chloromercuribenzoic acid. They were all active against casein in alkaline pH (pH optimum of 11.0) and specific activity was within the range 2.66–3.23 units mg−1 protein. Proteinases C, D and E were more stable in higher temperature and acidic pH than proteinases A and B. Molecular weights estimated by gel filtration were 37000, 37000, 44000, 127000 and 325000 for proteinases, A, B, C, D and E, respectively.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-2621.1990.tb01072.x

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Digitale Medien

Stabilization of ascorbic acid by microencapsulation in liposomes (1991)

KIRBY, C. J. ; WHITTLE, C. J. ; RIGBY, N. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

International journal of food science & technology 26 (1991), S. 0

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ISSN: 1365-2621

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Ascorbic acid was encapsulated with high efficiency inside liposomes. In this form, its stability was enhanced compared to that in free aqueous solution, and particularly in the presence of a number of factors widespread in foods, which normally lead to its rapid degradation. Possible mechanisms for these stabilizing effects are discussed. Amongst other potential applications, these findings are relevant to the preservation of nutritional supplements of vitamin C in solution and to the development of naturally derived antioxidant systems for food protection.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-2621.1991.tb01988.x

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Digitale Medien

A selection of forest condition indicators for monitoring (1992)

Rutters, K. H. ; Law, B. E. ; Kucera, R. C. ; [weitere]

Springer

Environmental monitoring and assessment 20 (1992), S. 21-33

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ISSN: 1573-2959

Quelle: Springer Online Journal Archives 1860-2000

Thema: Energietechnik

Notizen: Abstract Regional monitoring and assessments of the health of forested ecosystems require indicators of forest conditions and environmental stresses. Indicator selections depend on objectives and the strategy for data collection and analysis. This paper recommends a set of indicators to signal changes in forest ecosystem distribution, productivity, and disturbance. Additional measurements are recommended to help ascribe those changes to climate variation, atmospheric deposition, and land use patterns. The rationale for these indicators is discussed in the context of a sequential monitoring and assessment strategy.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00396518

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