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Digitale Medien

Lattices and infinite-dimensional forms. ‘The Lattice Method’ (1987)

Gross, H.

Springer

Order 4 (1987), S. 233-256

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ISSN: 1572-9273

Schlagwort(e): 06A15 ; 06C05 ; 06C99 ; 11E04 ; 11E99 ; 15A63 ; Orthogonal geometry ; computation of lattices

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik

Notizen: Abstract Hermitean vector spaces E of infinite dimensions are considered. Let G be a subgroup of the orthogonal group of E acting on a set M. The ‘Lattice Method’ is a technique for classifying the orbits in M under G. We discuss the method in abstract terms and we illustrate it by means of three classification results showing that it is decisive to do a considerable amount of explicit calculations with vector subspace lattices.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00337887

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Digitale Medien

Investigations of the turnover of the putative cellulose-synthesizing particle “rosettes” within the plasma membrane ofFunaria hygrometrica protonema cells (1989)

Rudolph, Ulrike ; Gross, H. ; Schnepf, E.

Springer

Protoplasma 148 (1989), S. 57-69

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ISSN: 1615-6102

Schlagwort(e): Funaria protonemata ; Polar cell wall formation ; Membrane rosettes ; Freeze fracturing ; Growth inhibition

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary In youngFunaria protonemata the influence of various inhibitors and treatments on cell elongation, fine-structure, and particle rosettes within the plasma membrane, putative parts of cellulose synthase complexes, was investigated. Cycloheximide (3×10−5M) inhibited growth, reduced the number of rosettes and evened the gradient of rosette distribution at the beginning of treatment. The cell fine-structure was unaffected. Actinomycin D (10−5M and 10−4) caused an initial but transient decrease in rosette number. Alterations in cell elongation and fine-structure have not been observed. Application of 2.6-dichlorobenzonitrile (10−5 M) for some minutes reduced the number of rosettes remarkably, while cell elongation seemed to be normal after the filaments had been transferred back to normal medium. An incubation of 2 h or longer stopped growth and caused cells to burst. The number of rosettes then rose to about 50% of the control values. When applied for 7 h biofluor (5×10−4 M) promoted growth slightly, but generally it retarded it when used for a longer time. It did not markedly affect the number of rosettes. A short heat stock stopped elongation, caused the disappearance of rosettes and affected the structure of the mitochondria and of the Golgi apparatus. Plasmolysed cells did not grow and, initially, did not have rosettes. At reduced turgor, wider cells are formed. Freeze fracturing under UHV conditions and shadowing at very low specimen temperature revealed a small, central depression in the 8 nm rosette particles, suggesting that they are composed of subunits. Our results provide further evidence that the rosettes are parts of the cellulose synthase complexes. Their existence clearly depends on protein synthesis and on the constitution of the plasma membrane, but not on cellulose crystallization.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02079323

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Digitale Medien

Derivate des Phosphorsäure-o-phenylenesters. 34. Zur Halogenierung der o-Methoxyphenylester von PIII-Säuren (1986)

Gloede, J. ; Costisella, B. ; Gross, H.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 535 (1986), S. 221-228

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ISSN: 0044-2313

Schlagwort(e): Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Beschreibung / Inhaltsverzeichnis: Derivatives of o-Phenylene Phosphate. 34. Halogenation of o-Methoxyphenyl Phosphinites, Phosphonites, and Phosphiteso-Methoxyphenyl phosphinites, phosphonites, and phosphites react with halogenes to halogenophosphonium-halides 4, which are stabilized by ligand exchange with the starting material to phosphonium salts or by elimination of methylhalide to cyclic phosphoranes.

Notizen: o-Methoxyphenyl-phosphinite, -phosphonite und -phosphite reagieren mit Halogenen zu Halogenphosphoniumhalogeniden 4, die sich entweder durch Ligandenaustausch mit dem Startprodukt als Phosphoniumsalze oder durch Abspaltung von Methylhalogenid als cyclische Phosphorane stabilisieren.

Zusätzliches Material: 4 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/zaac.19865350426

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