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  • 1
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé L'étude de différents allotypes du système Gm a été pratiquée sur les sérums provenant de onze familles dont au moins un des membres présentait un déficit mineur ou grave portant sur une ou plusieurs classes d'immunoglobulines. Dans six de ces familles, deux ordres de faits sont observés, simultanément ou non, chez des sujets ne présentant, par les méthodes classiques, aucun désordre immunologique: une diminution de l'expression phénotypique d'un ou plusieurs facteurs qui permet de conclure à un déficit sélectif de certaines sous-classes de γG; ces déficits sont, parfois, transmis directement à la génération suivante; des anomalies d'ordre qualitatif se caractérisant par la présence de phénotypes, en règle générale, rarement rencontrés parmi des Caucasiens. L'hypothèse faisant appel à l'existence de gènes de structure rares ou anormaux pour expliquer ces faits ne peut être retenue car elle aboutit à la constatation de trop nombreuses exclusions de paternité ou de maternité. Dans une seconde hypothèse, nous supposons qu'existent des gènes de régulation responsables de la synthèse des chaines γ1, γ2 et γ3 et que les anomalies phénotypiques observées sont l'expression de la modification de ces gènes. La transmission de ces gènes de régulation se ferait indépendamment de celle des gènes de structure.
    Notes: Summary Different allotypes of the Gm system were studied on sera from eleven families where at least one of the members had a minor or important deficiency in one or several classes of immunoglobulins. In six of these families two facts were observed, simultaneously or not, in subjects showing no immunologic disorder, as revealed by conventional methods: a reduction in the phenotypic expression of one or several factors which allowed to conclude that there is a selective deficiency in certain γG subclasses; these deficiencies are sometimes directly transmitted to the following generation; qualitative anomalies characterized by the presence of phenotypes, as a general rule, rarely encountered among Caucasians. The hypothesis based on the existence of rare or abnormal structural genes could not be applied to explain these facts because it would have led to the statement that there are too many exclusions of paternity or maternity. In a second hypothesis, we supposed that there exist regulator genes, responsible for the synthesis of the γ1, γ2, and γ3 chains, and that the observed phenotypic anomalies are an expression of the mutation of these genes. The transmission of these regulator genes could be independent of that of the structural genes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 42 (1992), S. 329-332 
    ISSN: 1432-1041
    Keywords: Midazolam ; Fentanyl ; Neonates ; pharmacokinetics ; sedation drug interaction ; hypotension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Midazolam is a water soluble benzodiazepine, with a short elimination half-life in adults and children. An IV bolus (0.2 mg·kg−1) immediately followed by continuous infusion of 0.06 mg·kg−1·h−1 was administered to 15 critically ill neonates at a gestational age of 32.8 weeks, who required sedation for mechanical ventilation. Heart rate and blood pressure were closely monitored. Hypotension occurred in 4 patients after the bolus dose or during the continuous infusion. Three of them had also been given fentanyl. Individual pharmacokinetic parameters were calculated: plasma clearance was 3.9 ml·min−1, elimination half-life was 12.0 h. Because of its short half-life compared to diazepam, midazolam may be used during the neonatal period to achieve rapid, brief sedation. However, it should be administered cautiously to neonates, particularly in premature infants, or if fentanyl is also given.
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  • 3
    ISSN: 0931-1890
    Keywords: Key words Juglans ; Wood colour ; Hydrojuglone glucoside ;  Quercitrin ; Ellagic acid derivative
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Radial distribution of soluble phenolics was investigated at different heights in stems of Juglans nigra, J. regia and hybrids J. nigra 23 × J. regia. Four major phenolic compounds were studied: hydrojuglone glucoside (HJG), quercitrin (QUER) and two unknown compounds characterized as two ellagic acid derivatives E1 and E2. HJG and E1 content increased gradually in the sapwood, peaked in the sapwood-heartwood transition zone, and decreased drastically in the heartwood. QUER was accumulated preferentially around the transition zone, and its content was relatively low in the outer part of the sapwood and in the inner part of the heartwood. E2 content was low in the sapwood and increased in the heartwood. The heartwood formation was marked by the accumulation of new soluble compounds. The relationship between wood extractives and wood colour were evaluated and discussed. HJG was considered to be a major precursor of heartwood colour providing chromophores through hydrolysis (deglucosylation), oxidation and polymerization processes.
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 106 (1982), S. 87-93 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 170 (1990), S. 748-754 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 131 (1985), S. 736-742 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 255 (1975), S. 714-716 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This has provided us with the possibility of raising a specific rabbit anti-NCA antiserum, and of using it to study the localisation of NCA by indirect immunofluorescence the second layer being a fluoresceinated sheep anti-rabbit globulin antiserum (Institut Pasteur, Paris). We have already shown ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 375-377 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The results reported here provide evidence that binding of iron brings about a similar change involving only a part of the antigenic determinants of human transferrin. Purified transferrin (lot No. 1227/34) type C was provided by Behringwerke, Marburg, Germany. Its coefficient of iron saturation ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 1136-1137 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Since then, the heavy chains of yG have been subdivided into four subclasses: yGl, yG2, yG3 and yG43'4. The Gm factors were located on these subclasses as follows: the yGl carry Gm factors 1, 2, 4, 8, 9, 17, 18 and 22; the yG2 carry factors Gm 8 and 23. The Gm factors 5, 6, 10, 11, 14, 15, 16 and ...
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    European journal of soil science 53 (2002), S. 0 
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The topsoils of Andisols in the wet high altitude grasslands (páramos) of Ecuador have shrunk after recent changes from permanent grassland to agriculture. The question arises as to whether all Andisols in the region behave in the same way. We have therefore studied the shrinkage on drying of topsoils from four representative types of Andisol in the páramos using a combination of drying kinetics and mercury porosimetry. We aimed to identify and quantify the pore volumes that participate in either drainage or shrinkage or both. The key concept of hierarchical dual porosity of soils used to interpret the shrinkage curves was partly validated, but we also identified more complex relations between drainage, shrinkage and structure. We found that the older was the soil, the more weathered it was, and, consequently, the greater its aggregation and porosity. In turn, the total volumetric shrinkage was controlled by the initial void ratio of the wet soil samples. Our results also show that the solid–pore interfaces of the volcanic soil aggregates were less accessible after shrinkage than before.
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