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  • Glutamine synthetase  (2)
  • Organic Chemistry  (2)
  • Seckel syndrome  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Factors involved in the coordinate appearance of nitrite reductase and glutamine synthetase in the mustard (Sinapis alba L.) seedling (1990)
    Springer
    Planta 180 (1990), S. 429-434 
    Details
    ISSN: 1432-2048
    Schlagwort(e): Glutamine synthetase ; Nitrate (as inductor) ; Nitrite reductase ; Phytochrome (as inductor) ; Sinapis (nitrate assimilation)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The extent to which the appearances of nitrite reductase (NIR; EC 1.7.7.1) and glutamine synthetase (GS; EC 6.3.1.2) are coordinated was studied in mustard (Sinapis alba L.) seedlings. It was established by immunotitration that the increased activities of NIR and GS in the presence of light and nitrate can be attributed to the de-novo synthesis of enzyme protein. The bulk of the NIR and GS was found in the developing cotyledons. In the absence of nitrate in the growth medium there was no coordinate appearance of NIR and GS. While light strongly stimulated the appearance of GS, the level of NIR was hardly affected and remained low. On the other hand, in the presence of nitrate in the medium the appearances of NIR and GS were strictly coordinated, the GS level being considerably above that of NIR. It is argued that phytochrome-controlled synthesis of GS in the absence of nitrate is part of the mechanism to reassimilate ammonium liberated during proteolysis of storage protein and metabolism of the resulting amino acids, whereas the strictly coordinated synthesis in the presence of light and nitrate indicates the dominance of nitrate assimilation under these circumstances. The fact that the level of GS was always considerably above that of NIR appears to be a safety measure to prevent ammonium accumulation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00198796
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  • 2
    Digitale Medien
    Digitale Medien
    Case report (1996)
    Springer
    European journal of pediatrics 155 (1996), S. 796-799 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Bird-headed dwarfism ; Craniosynostosis ; Microcephalic osteodysplastic primordial dwarfism ; Osteodysplastic primordial dwarfism ; Seckel syndrome
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Abstract We report on a 13-month old boy with microcephalic osteodysplastic primordial dwarfism (MOPD), whose radiographic signs correspond with type II of this entity. Some of his clinical signs, such as the anomalies of the external genitalia and the urinary tract, are common to this subgroup of MOPD, but he also shows unusual clinical signs including bilateral knee dislocation and hypoplasia of the anterior corpus callosum. His clinical course was unusual with several episodes of breathing difficulties and increased intracranial pressure secondary to craniosynostosis at the age of 16 months. After fronto-orbital advancement for the treatment of brachycephaly, his psychomotor development improved remarkably. Conclusion MOPD type II may have a wider range of expression than previously delineated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02002910
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  • 3
    Digitale Medien
    Digitale Medien
    Case report (1996)
    Springer
    European journal of pediatrics 155 (1996), S. 796-799 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Key words Bird-headed dwarfism ; Craniosynostosis ; Microcephalic ; osteodysplastic primordial dwarfism ; Osteodysplastic primordial ; dwarfism ; Seckel syndrome
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We report on a 13-month old boy with microcephalic osteodysplastic primordial dwarfism (MOPD), whose radiographic signs correspond with type II of this entity. Some of his clinical signs, such as the anomalies of the external genitalia and the urinary tract, are common to this subgroup of MOPD, but he also shows unusual clinical signs including bilateral knee dislocation and hypoplasia of the anterior corpus callosum. His clinical course was unusual with several episodes of breathing difficulties and increased intracranial pressure secondary to craniosynostosis at the age of 16 months. After fronto-orbital advancement for the treatment of brachycephaly, his psychomotor development improved remarkably. Conclusion MOPD type II may have a wider range of expression than previously delineated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02002910
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Factors involved in the coordinate appearance of nitrite reductase and glutamine synthetase in the mustard (Sinapis alba L.) seedling (1990)
    Springer
    Planta 180 (1990), S. 429-434 
    Details
    ISSN: 1432-2048
    Schlagwort(e): Glutamine synthetase ; Nitrate (as inductor) ; Nitrite reductase ; Phytochrome (as inductor) ; Sinapis (nitrate assimilation)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The extent to which the appearances of nitrite reductase (NIR; EC 1.7.7.1) and glutamine synthetase (GS; EC 6.3.1.2) are coordinated was studied in mustard (Sinapis alba L.) seedlings. It was established by immunotitration that the increased activities of NIR and GS in the presence of light and nitrate can be attributed to the de-novo synthesis of enzyme protein. The bulk of the NIR and GS was found in the developing cotyledons. In the absence of nitrate in the growth medium there was no coordinate appearance of NIR and GS. While light strongly stimulated the appearance of GS, the level of NIR was hardly affected and remained low. On the other hand, in the presence of nitrate in the medium the appearances of NIR and GS were strictly coordinated, the GS level being considerably above that of NIR. It is argued that phytochrome-controlled synthesis of GS in the absence of nitrate is part of the mechanism to reassimilate ammonium liberated during proteolysis of storage protein and metabolism of the resulting amino acids, whereas the strictly coordinated synthesis in the presence of light and nitrate indicates the dominance of nitrate assimilation under these circumstances. The fact that the level of GS was always considerably above that of NIR appears to be a safety measure to prevent ammonium accumulation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01160400
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Flüssig-kristalline Cyclohexan-Derivate mit lateralen Substituenten in der Alkylmittelgruppe (1993)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 205-208 
    Details
    ISSN: 0941-1216
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Liquid Crystalline Derivatives of Cyclohexane with Lateral Substituents in the Middle Group
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19933350217
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Flüssigkristalle mit aliphatischen Gruppen zwischen Cyclohexanringen - Synthesen von 1,4-Bis-(4-n-alkylcyclohexyl)butanen und 4-[4-4(4-n-Alkylcyclohexyl)butyl]cyclohexylestern (1992)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 625-629 
    Details
    ISSN: 0941-1216
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Liquid Crystals with Aliphatic Groups between Cyclohexane Rings - Synthesis of 1,4-Bis(4-n-alkylcyclohexyl)butanes and Esters of 4-[4-(4-n-Alkylcyclohexyl)-butyl]cyclohexanolsThe synthesis of 1,4-bis-(4-n-alkylcyclohexyl) butanes (1), esters of 4-[-(4-n-alkylcyclohexyl)butyl]cyclohexanols (2) and some analogous aromatic compounds are described. The thermal stability of mesophases of these compounds are in the order of the analogous ethylene-bridged liquid crystals. The reason for this result seems to be the combination of molecular rigidity and conformational flexibility.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19923340713
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