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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Aquaculture nutrition 3 (1997), S. 0 
    ISSN: 1365-2095
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The availability of a rapid, cost-effective, accurate and reliable method of assessing fish meal protein digestibility would greatly enhance and standardize quality-control procedures in both the fish meal and fish feed industries. However, while several in vitro digestibility tests have been developed, few have been adopted by industry due to their time-consuming nature, problems surrounding reliability and/or inconsistencies in predictive ability. The present investigation was undertaken to evaluate the utility and predictive qualities of two in vitro digestion assays of distinct design. Methods examined included a novel open system, wherein on-line removal of digestion products was attainable, and a closed system, which permitted analysis of products following completion of the digestion process. Results provided by the two systems were compared using four differentially processed fish meals. The open system supplied information based upon the detected quantity of products below 10 kDa. The closed system provided measurement of free amino groups. Both methods were in agreement with respect to assessing the presence of hydrolysed product. Both systems furnished complementary data with respect to the characterization of fish meal protein quality. The closed and open systems provided insight upon digestibility and digestion kinetic profiles respectively.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 1224-1225 
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Three β-mannanase isoforms were isolated from the supernatant of a thermophilic actinomycete culture from Thermomonospora fusca KW3. Two of the isoforms (Q1, Q 1.1) were crystallized by the hanging-drop method at room temperature using ammonium sulfate as a precipitant. The isoforms form rod-shaped colorless crystals. Both belong to the orthorhombic space group P212121. The cell dimensions are a = 46.7, b = 61.1, and c = 128.2 Å for isoform Q1, and a = 43.8, b = 46.2, and c = 132.8 Å for isoform Q1.1. The asymmetric unit of either isoform contains one mannanase molecule. Native data have been collected to 2.2 Å resolution for Q1 and to 1.65 Å resolution for Q1.1 using synchrotron radiation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 73 (1937), S. 165-171 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Zusammenfassung Es wurde eine Anzahl Kirschen- und Zwetschenbranntweine auf ihren Gehalt an Methylalkohol untersucht und hierfür die Methode von Ant-Wuorinen, die einige Abänderungen erfuhr, benutzt. Die gefundenen Werte liegen bei den Kirschwässern um 0,6 Vol.-%, bezogen auf den Gesamtalkohol. Bei den Zwetschenbranntweinen steigen sie teilweise bis auf das Doppelte an. Bei der Destillation der Kirschmaischen und-branntweine weist der Methylalkoholgehalt der einzelnen Fraktionen keinen auffallenden Unterschied auf. Das den Methylalkohol des Pektins abspaltende Enzym entstammt der Obstamaische und nicht der Hefe. Bei der experimentellen Ausführung der Arbeit unterstützte uns Herr Dr. Ebeling aufs beste.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 72 (1936), S. 499-503 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Zusammenfassung Untersucht wurde der Einfluß von Milchsäure, Citronensäure und Phosphorsäure auf gärende Kirschmaischen und gefunden, daß mit steigenden Mengen Milchsäure die Gärung reiner verläuft, die flüchtige Säure abnimmt und die Alkoholausbeute steigt. Der aus so behandelten Maischen hergestellte Branntwein ist reintönig im Geschmack. Die Phosphorsäure weist einige der Milchsäure ähnliche Wirkung auf, die Citronensäure zeigt ein davon abweichendes Verhalten.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0983
    Keywords: Heterologous gene expression ; Plasmid copy number ; GAP promoter ; Hirudin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The yeast Saccharomyces cerevisiae has been engineered to synthesize and secrete desulfato-hirudin (hirudin), a thrombin inhibitor from the leech Hirudo medicinalis. The synthetic gene coding for hirudin was expressed constitutively under the control of four size-variants of the yeast glyceraldehyde-3-phosphate dehydrogenase promoter (GAP) and cloned into a 2 μ based multicopy yeast vector. The constitutive action of the four promoter variants was confirmed by demonstrating that the expression and secretion of hirudin is growth-related. The different efficiencies of the promoter variants not only affected hirudin expression but also led to changes in several cellular parameters, such as cell growth, average plasmid copy number and plasmid stability. The observed changes show that yeast cells establish a specific equilibrium for each promoter variant. We conclude, that the adjustment of cellular parameters in response to the expression levels of a heterologous protein is regulated by two counteracting selective forces: (1) the need for complementation of the auxotrophic host marker by the plasmid-encoded selection gene which, in the case of dLEU2, requires several plasmid copies; and (2) a selective advantage of cells with a lower copy number enabling them to escape the burden of heterologous protein production.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 34 (1948), S. 106-111 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 33 (1947), S. 122-130 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung In der vonK. Bürger in einer 3. Mitteilung nochmalsmodifizierten Arbeitsvorschrift zur quantitativen Auswertung derVohlschen Reaktionsmasse zwecks Bestimmung des Schwefels sind immer noch Fehlerquellen unberücksichtigt geblieben, auf die wir früher schon aufmerksam gemacht hatten. Es wird deshalb an Hand einiger Versuchsreihen nochmals nachgewiesen, daß auch nach der 3.Bürgerschen Arbeitsweise eine exakte Bestimmung des Schwefels in organischen und gewissen anorganischen Substanzen nicht möglich ist. Nur mit Hilfe der von uns früher schon beschriebenen Destillationsmethode ist es möglich, das in derVohlschen Reaktionsmasse vorliegende Sulfid vor der jodometrischen Bestimmung von den störenden Beimengungen zu befreien. Es wird ein für alle Substanzen gemeinsames Aufschlußverfahren nochmals eingehend dargelegt, wie es sich nach vielen Tausenden von Analysen als zweckmäßig erwiesen hat. Eine kleine apparative Veränderung am Destillationsapparat wird beschrieben.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0533
    Keywords: Key words Borna disease virus ; Cat diseases ; Encephalomyelitis ; Immunopathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Barrier-bred cats were inoculated intracerebrally with either the rabbit-adapted Borna disease virus (BDV) strain V or a newly isolated feline BDV, obtained from a cat with natural staggering disease (SD). Three out of eight inoculated cats developed neurological signs and non-suppurative encephalitis; all three recovered from the acute stage of disease. Sero-conversion and the development of neutralizing antibodies occurred in all of the virus-inoculated cats. In addition, cats inoculated with feline BDV showed an early peripheral T cell response not present in cats inoculated with BDV strain V, suggesting that the feline virus exerted a more vigorous effect on the immune system. Using immunohistochemistry and a reverse transcriptase-polymerase chain reaction assay, BDV-specific antigen and nucleic acid could be demonstrated in brain samples from each cat with encephalitis, showing that incomplete viral clearance was probably responsible for the maintenance of inflammation. The successful induction of neurological signs and encephalitis in one cat infected with feline BDV, together with the detection of BDV-specific antigen and nucleic acid in the brain, provides strong evidence for the notion that BDV is the etiological agent behind feline SD.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The conversion of soluble starch to cyclomaltohexaose (α-CD), cyclomaltoheptaose (β-CD), cyclomaltooctaose (γ-CD) and cyclomaltononaose (δ-CD) by cyclodextrin glycosyltransferases (E.C. 2.4.1.19) from Bacillus spp. and bacterial isolates was studied. The results show that δ-CD was formed by all the enzymes investigated in the range of 5%–11.5% of the total amount of α-, β-, γ-, and δ-CD produced.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Tunicamycin inhibited the production of infectious Borna disease virus (BDV) and glycosidase treatment eliminated the infectivity of cell-free virus. A glycoprotein of approximately 17 kDa, found in association with infectious virus, was identified by Concanavalin A binding.
    Type of Medium: Electronic Resource
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