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  • 1985-1989  (7)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 752-755 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Empirical economics 13 (1988), S. 209-222 
    ISSN: 1435-8921
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract This paper is concerned with the Bayes estimation of an arbitrary multivariate density,f(x), x ∃ R k. Such anf(x) may be represented as a mixture of a given parametric family of densities {h (x¦θ)} with support inR k, whereθ (inR d) is chosen according to a mixing distributionG. We consider the semiparametric Bayes approach in whichG, in turn, is chosen according to a Dirichlet process prior with given parameterα. We then specialize these results whenf is expressed as a mixture of multivariate normal densitiesΦ (x¦Μ, λ) whereΜ is the mean vector and λ is the precision matrix. The results are finally applied to estimating a regression parameter.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 219-221 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The global climate underwent major change during the Miocene period. The data indicate that there were several significant fluctuations at regular intervals of approximately 1-1.3 Myr. According to Kennet18 episodes interpreted as having been warmer and with less polar ice occurred in 13.5-4 Myr ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 24 (1989), S. 4399-4402 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Crystallization kinetics of MSI and MSII stages in Metglas 2826A has been investigated by quantitative transmission electron microscopy. The volume fraction of crystallization against time curve has been found to show a plateau in the lower temperature region of annealing. It has been found that the glass transition temperature, T g, has no effect on the sequence reversal of the crystallization reaction. It has been shown that the sequence reversal of transformation stages occurs due to the large difference in the activation energy of crystallization of MSI and MSII. In addition, the change in the morphology of the crystals obtained by annealing the amorphous alloy below and above the glass transition temperature, T g, is reported.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 32 (1987), S. 1023-1038 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung 4,4′-Bismalimidophenyl-methan (BM) und 3,3′-Bismalimidophenyl-sulfon (BS) wurden in Lösung in den Gewichtsverhältnissen 3∶1 (MS31), 2∶1 (MS21), 1∶1 (MS11), 1∶2 (MS12) und 1∶3 (MS13) gemischt. Auch kettenpolymerisierten Bismalimid-Harze wurden durch Behandlung von BS/BM mit Diaminodiphenylether im Molverhältnis 1∶0,3 dargestellt (BM-E- und BS-E-Harze). Die Kennwerte der Aushärtung von Mischungen dieser Harze mit den Bismalimiden wurden mittels DSC ermittelt. Eine Erhöhung des BM-Gehaltes in den BM ∶ BS-Mischungen oder des Gehaltes der BM-E ∶ BS oder BS-E-Mischungen an kettenpolymerisierten Bismalimiden führt zu einer Erniedrigung der Schmelz- und Aushärtetemperaturen. Hinweise über den Vernetzungsgrad wurden aus Löslichkeitsmessungen (in DMF) von Isotherm (je 1 Stunde bei 180 und 220 °C in Luft) gehärteten Harzen erhalten. Die thermogravimetrische Analyse der Isotherm bei 180 bzw. 220 °C 1 Stunde ausgehärteten Proben wurde in Stickstoffatmosphäre ausgeführt. Die thermische Stabilität der Bismalimide wird durch Verschneiden verbessert.
    Abstract: Резюме 4,4-бис-малеинимидофени лметан (БМ) и 3,3-бис-малеинимидофени лсульфон (БС) были смешаны в раство ре в весовых соотноше ниях 3∶1 (MC 31), 2∶1 (MC 21), 1∶1 (MC 11), 1∶2 (MC 12) и 1∶3 (MC13). Были также получ ены смолы с удлиненны м бис-малеинимидным зв еном обработкой БС/БМ с 4,4-ди аминдифениловым эфи ром в молярном соотношени и 1∶0,3 (смолы БМ-Е и БC-ОЕ). Эти смолы за тем смешивались с бис-малеинимидами и м етодом ДСК параметры их отвержд ения. Увеличение соде ржания БМ в смесях БМ-БС или же уве личение содержания удлиненн ой бис-малеинимидной цепи в смесях БМ-Е и БС-Е приво дило к понижению как темпер атуры плавления, так и температуры отвержд ения. Показания о степ ени смешения были получе ны измерением раство римости изотермически отвер жденных смол (р течении 1 часа на возду хе при температуре 180 и 220°) в диметилформамиде. Термогравиметричес кий анализ изотермич ески отвержденных образц ов был проведен в атмосфере азота. При с мешении бис-малеиним идов с удлиненной цепью наб людалось улучшение их термоус тойчивости.
    Notes: Abstract 4,4′-bismaleimidophenyl methane (BM) and 3,3′-bismaleimidophenyl sulfone (BS) were blended in solution using weight ratios 3∶1 (MS31), 2∶1 (MS21), 1∶1 (MS11), 1∶2 (MS12) and 1∶3 (MS13). Chain extended bismaleimide resins were also prepared by treating BS/BM with 4,4′-diaminodiphenyl ether in molar ratios of 1∶0.3 (BM-E and BS-E resins). These resins were also blended with bismaleimides and the curing characteristics were evaluated by differential scanning calorimetry. Increase in BM content in BM∶BS blends or increase in chain extended bismaleimide content in BM-E∶BS or BS-E ∶ BM blends resulted in a reduction of melting and curing temperatures. Indication about the extent of cross-linking was obtained from solubility measurements (in DMF) of isothermally cured resins (180 °C, lh and 220 °C, lh in an air oven). Thermogravimetric analysis of samples isothermally cured at 180 °C and 220 °C (lh each) was carried out in nitrogen atmosphere. Improvement in thermal stability of chain extended bismaleimides was observed on blending.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 4 (1988), S. 431-437 
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé L'ajout d'ammoniaque de 0.134 à 0.67m à la viande moulue fait décroître le nombre total de bactéries aérobies et, dans une moindre mesure, de bactéries Gram-négatives, tant à 37°C qu'à 4°C et à −20°C. Le comptage sur boîte de Pétri au même pH, obtenu par ajustement au NaOH 1m, révèle des valeurs considérablement plus élevées que lorsque l'ammoniaque 0.4m est utilisé, indiquant par là que c'est bien l'ammoniaque qui agit en tant que préservatif pour la viande moulue et non le seul changement de pH. Les changements en volume d'extrait relâché, en capacité de rétention d'eau, en azote protéique soluble, sont bien moins prononcés dans le cas de la viande moulue contenant de l'ammoniaque que dans le contrôle sans préservatif ou contenant du NaOH.
    Abstract: Resumen La adición de hidróxido amónico a concentraciones de 0.134 a 0.67m disminuyó el número total de bacterias aerobias y en menor proporción la cantidad de bacterias gram negativas a 37°C, 4°C y a −20°C. El conteo efectuado a un mismo pH ajustado con NaOH 1m o bien con NH4OH 0.4m fue considerablemente superior en el primer caso, indicando que el efecto de NH4OH no era únicamente debido al cambio de pH sino que extracto liberado, en la capacidad de retención de agua, en las proteinas/nitrógeno soluble y las perdidas por cocción fueron menores en la carne picada que contenía NH4OH comparada con el control (sin preservativo) o con la que contenía NaOH.
    Notes: Summary Ammonium hydroxide when added at 0.134 to 0.67m to ground-meat, decreased the total number of aerobic bacteria and, to a lesser extent, Gram-negative bacteria at 37°C, 4°C and −20°C. The plate count at the same pH adjusted with 1m NaOH was considerably more than when 0.4m NH4OH had been used, indicating that NH4OH was acting as preservative for ground-meat and not the merely changing the pH. The changes in extract release volume, water holding capacity, soluble protein nitrogen and cook out losses were much less in ground meat containing NH4OH as compared to control (no preservative) or containing NaOH.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 4 (1988), S. 333-337 
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé L'incidence de souches entéropathogènes d'Escherichia coli était plus élevée (33 à 50%) dans les saucisses de poulet cru que dans les saucisses de porc cru (10 à 43%). Les souches toxigènes d'E. coli isolées étaient en général de type sérologique O5 ou O89. Les tests du loop iléal et de la perméabilité de la peau de lapin ont démontré que la quantité de toxine produite variait dans les saucisses crues et bouillies. La production de toxine était invariablement plus élevée à 28 ou à 37°C qu'à 45°C tant dans les saucisses crues que dans les saucisses bouillies.
    Abstract: Resumen La incidencia de cepas enteropatógenas deEscherichia coli fue mayor (33 a 50%) en salsichas de pollo crudas que salsichas de cerdo. Los aislados toxinogénicos pertenecían en su mayoría a los serotipos O5 y O89 deE. coli. La variación en la cantidad de toxina producida entre salsichas crudas y hervidas se midió mediante pruebas de permeabilidad en asa ileal y piel de conejo. La producción de toxinas, tanto en salsichas crudas como hervidas, era mayor a 28°C o a 37°C que a 45°C.
    Notes: Summary The incidence of enteropathogenicEscherichia coli was higher (33 to 50%) in uncooked chicken sausages than in pork sausages (10 to 43%). The toxigenic isolates in general were of O5 and O89 sero types ofE. coli. The amount of toxin produced varied in raw and boiled sausages as tested by ileal loop and rabbit skin permeability tests. The toxin production was invariably higher at 28°C or 37°C in raw and boiled sausages than at 45°C.
    Type of Medium: Electronic Resource
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