ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Blackwell Publishing Ltd  (7)
  • Wiley-Blackwell  (5)
  • 1995-1999
  • 1985-1989  (9)
  • 1975-1979  (3)
  • 1989  (9)
  • 1976  (3)
Collection
Keywords
Publisher
Years
  • 1995-1999
  • 1985-1989  (9)
  • 1975-1979  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Description of the Infraciliature and Morphogenesis in the Ciliate Urotricha ondina N. Sp. (Prorodontida, Urotrichidae) (1989)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 36 (1989), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Recent works on prostomatid ciliates show that some genera of this group have a differentiated oral infraciliature and that their stomatogenesis during division involves the proliferation of only a few somatic kineties. These findings have significant implications regarding the iaxonomic status of these genera and also on the terminology used for the oral structures. In Urotricha ondina, the oral infraciliature consists of (1) a paroral kinety formed of paired kinetosomes that encircle the cytostome at the anterior pole of the cell and (2) 3 adoral organelles, each formed of 2 rows of kinetosomes, ventral in position and obliquely disposed, lying above 3 short somatic kineties that do not reach the anterior pole of the cell. This oral ciliature —formerly known as the corona and brosse, respectively—originate during stomatogenesis from the proliferation of 4 somatic kineties that lie posterior to the adoral organelles of the parental cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1989.tb02719.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Changes in glutamate dehydrogenase activity of Chlamydomonas reinhardtii under different trophic and stress conditions (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 12 (1989), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Under stress conditions (darkness, nitrogen starvation, high ammonium concentrations, glutamine synthetase and glutamate synthase inhibition) glutamate dehydrogenase animating activity levels of Chlamydomonas cells varied inversely to those of glutamine synthetase. Nitrogen and carbon sources also influenced glutamate dehydrogenase levels in Chlamydomonas, the highest values being found in cells cultured mixotrophically with ammonium, under which conditions glutamate dehydrogenase and glutamine synthetase levels were likewise inversely related. These facts, together with the analysis of internal fluctuations of ammonium, 2-oxoglutarate, and the amino acid pool as well as the variations of certain enzymes involved in carbon metabolism indicate that glutamate dehydrogenase animating activity is adaptative, being involved in the maintenance of intracellular levels of L-glutamate when they cannot be maintained by the GS-GOGAT cycle, and probably more connected with carbon than nitrogen metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1989.tb01930.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Physiological significance of the binding of acidic isoperoxidases to cell walls of lupin (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 75 (1989), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Intercellular acidic isoperoxidases (EC 1.11.1.7) isolated from exponentially growing lupin (Lupinus albus. L. cv. multolupa) hypocotyls are under the control of exogenously applied auxins. Application of auxins leads to a short-term reduction in the level of free intercellular peroxidases, and this effect is associated with a binding of these free peroxidases to the cell walls, probably mediated by an acidification of the cell wall. The ratio of free intercellular peroxidases to the total intercellular peroxidase activity, varies along the axis of exponentially growing hypocotyls. It has a V-shaped distribution with the minimum value in the elongation III-zone, where high levels of auxins have previously been implied in differentiation. This minimum value coincides spatially with the first signs of cell wall thickening in the hypocotyl cells and, paradoxically, it is out of phase with respect to the maximal cell elongation. On the other hand, the ratio of free intercellular peroxidases reaches its maximal values in both the most undiffercntiated phloem cells and the differentiated xylem cells. High levels of free intercellular peroxidase activity in phloem cells are hard to explain, since phloem cell walls remain unlignified during almost all stages of differentiation. However, association of free intercellular peroxidase activity with xylem cells is clearly associated with the lignification of the xylem cell walls. The physiological significance of the binding vs release of intercellular peroxidase is discussed in relation to the catalytic properties and stability at acidic pH of both the bound and free forms of this enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1989.tb06179.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    CHRONIC ALCOHOL INGESTION: EFFECTS ON WATER METABOLISM (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 273 (1976), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1976.tb52898.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Adenylate energy charge during the life cycle of Myxococcus coralloides D (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 58 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The adenylate energy charge of cells of Myoococcus coralloides D has been measured during the different stages of its life cycle. The energy charge of the vegetative cells (0.8) did not change significantly either during glycerol-induced myxospore formation, or during germination of these myxospores. Fruiting body myxospores had a relatively high energy charge (0.65). The adenylate energy charge decreased slightly (from 0.82 to 0.65) throughout fruiting body development and returned to values of vegetative cells in the early hours of germination of fruiting body myxospores. The levels of adenine nucleotide in myxospores in desiccation conditions were similar to those before desiccation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03011.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Polyphosphate and orthophosphate content during the life cycle of Myxococcus coralloides D (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 65 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Pool changes in the orthophosphate and acid soluble and insoluble polyphosphates of Myxococcus coralloides D were determined during the different stages of its life cycle. The acid-insoluble fraction is the major fraction. Polyphosphate was synthesised during vegetative growth in a liquid medium and during aggregation and fruiting body maturation. During the induction and germination of myxospores both types of polyphosphate were depleted, the acid-insoluble fraction during the myxospore induction and the acid-soluble during germination. The orthophosphate pool remained constant or increased during growth in a liquid medium, increased during growth on solid media and myxospore induction and decreased during myxospore germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03605.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Glutamate dehydrogenase isozymes of Chlamydomonas reinhardtii (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 61 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract In Chlamydomonas reinhardtii there are three glutamate dehydrogenase isozymes which can use both NADH and NADPH as cofactors and respond differently to different nitrogen sources and several stress conditions. From data of induction of isozymes in different metabolic situations, we propose a possible physiological role for each of them in algal carbon and nitrogen metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03643.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Preparation and crystalline structure of random copolymers of glycine and β-alanine (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 190 (1989), S. 1379-1387 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Copolymers of glycine and β-alanine within a range of amount-of-substance compositions from 3:1 to 1:9 were prepared by polycondensation of mixtures of the respective pentachlorophenyl ester hydrobromides. Number-average molecular weights between 2 500 and 9 000 were obtained, the lower values corresponding to those copolymers with a higher content in glycine. Sequence distributions were evaluated by means of 50,3 MHz 13C NMR spectroscopy and the crystalline structure was examined by wide-angle X-ray diffraction. Random copolymers having similar contents in glycine and β-alanine were found to crystallize in a bidimensional hexagonal lattice (a = 4,79 Å) with chains packed in a similar manner as they do in the crystalline structure of polyglycine II. On the contrary, a heterogeneous product consisting of homopolymer and random copolymer fractions results from mixtures which are enriched in one of the two amino acids. The random copolymer poly(glycine-ran-β-alanine) adopts a packing scheme similar to that found for the helical form of the alternating copolymer nylon 2/3. Chains are hexagonally arranged and interlinked by a three-dimensional network of hydrogen bonds as described for the well known model of polyglycine II, although in the present case no order along the chain axis should be expected.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.021900618
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Solution polymerization of 1,3,5-trioxane and 1,3,5,7-tetroxocane, 1. Rate of polymerization, characterization and melting behaviour of as-polymerized poly(oxymethylene) (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 2149-2168 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Beziehung zwischen Polymerisationsgeschwindigkeit und Struktur der während der Polymerisation entstehenden Polymerkristalle wurde für die kationische Polymerisation von 1,3,5-Trioxan und 1,3,5,7-Tetroxocan („Tetroxan“) in Lösung untersucht. Es wurden folgende Monomer/Lösungsmittel Paare gewählt : Tetroxan/Nitrobenzol (I), Tetroxan/l,2-Dichloräthan (II), 1,3,5-Trioxan/chloriertes Paraffin (III) und 1,3,5-Trioxan/n-Paraffin (IV). Das in allen Fällen hergestellte Poly(oxymethylen), (POM), wurde nach Molekulargewicht, Röntgenkristallinität und dem Schmelzverhalten mit Hilfe der Differentialkalorimetrie, (DSC), charakterisiert. Für die Systeme I und II, wo die Polymerisationsgeschwindigkeit sehr groß war, wurde auf Grund der mit DSC erhaltenen Ergebnisse eine aus gefalteten Ketten bestehende Struktur gefunden. Bei höherem Umsatz im System II weist das Schmelzverhalten von POM jedoch auf eine gestreckt-kettige Struktur hin. Für die Systeme III und IV, wo die Polymerisationsgeschwindigkeit sehr langsam verläuft, kann aus den DSC-Ergebnissen in beiden Systemen aufzwei Kristallstrukturen geschlossen werden. Eine davon kann auf Grund der Überhitzungserscheinungen und auf Grund von Tempereffekten gestreckt-kettiges POM darstellen. Die andere Kristallstruktur zeigt kein eindeutiges Schmelzverhalten, weshalb aus den DSC-Ergebnissen allein die Struktur nicht zu bestimmen ist.
    Notes: A relationship between the rate of polymerization and the structure of the as-polymerized crystals is investigated in the cationic polymerization in solution of 1,3,5-trioxane and 1,3,5,7-tetroxocane. The monomer/solvent reaction systems chosen were: 1,3,5,7-tetroxocane/nitrobenzene (I); 1,3,5,7-tetroxocane/l,2-dichloroethane (II), 1,3,5-trioxane/chlorinated parafin (III), and 1,3,5,7-trioxane/normal paraffin (IV). The poly(oxymethylene), (POM), obtained in each case was characterized as to molecular weight, X-ray cristallinity and by differential scanning calorimetry (DSC). The data from the DSC curves indicated a folded chain structure for systems I and II, where the rate pf polymerization was very high. However in system II at high polymer conversion a fraction of POM appears with a melting behaviour characteristic of an extended chain structure. For systems III and IV, where the rate of polymerization was very low, the DSC curves indicated the presence of two crystal forms. One of these forms shows a clear response to overheating and annealing treatments, which indicates the presence of an extended chain structure. The second form shows ambiguous melting behaviour and by thermal data alone it is impossible to determine its structure.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770719
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Solution polymerization of 1,3,5-trioxane and 1,3,5,7-tetroxocane, 2.Part 1: cf.3. Morphology of the as-polymerized poly(oxymethylene) crystals (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 2169-2184 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Morphologie von Poly(oxymethylen), (POM), Kristallen, die aus verschiedenen Monomer/Lösungsmittel Polymerisationsystemen hergestellt worden waren, wurden mittels Elektronenmikroskopie untersucht. Die aus 1,3,5,7-Tetroxocan („Tetroxan“) in Nitrobenzol entstehenden POM Kristalle zeigen eine lamellare Morphologie mit undefinierter hexagonaler Form. Andererseits wurden neue rhombische POM Kristalle bei der Polymerisation von Tetroxan in 1,2-Dichloräthan erhalten. Beide Kristallarten zeigen wahrscheinlich eine Struktur mit gefalteten Ketten. Federartige Kristalle mit seitlich fibrillärem Wachstum wurden bei der Polymerisation von 1,3,5-Trioxan in n-Paraffin gefunden. Eine große Zahl von Kristallen verschiedener Morphologien wurde bei der Polymerisation von 1,3,5-Trioxan in chloriertem Parafin erhalten, die in zwei hauptsächliche Gruppen eingeteilt werden können: Eine Gruppe besteht aus veränderten federartigen Kristallen, während die andere mehr geometrisch dreieckige und rhombisch geformte Plättchen umfaßt. Alle diese Kristalle zeigen seitliches fibrilläres Wachstum, so daß am Ende der Polymerisation eine übenviegend fibrilläre Morphologie zu beobachten ist. Es wird angenommen, daß alle diese Kristalle eine gestrecktkettige Struktur aufweisen.
    Notes: The morphology of poly(oxymethylene), (POM), crystals obtained from different monomer/solvent polymerization systems was studied by means of electron microscope techniques. POM obtained from 1,3,5,7-tetroxocane in nitrobenzene had an irregular hexagonoidal shaped lamellar morphology, while rhombic POM crystals were obtained from the polymerization of 1,3,5,7-tetroxocane in 1,2-dichloroethane. Both types of crystals probably have a folded chain structure. POM obtained from 1,3,5-trioxane in normal (unbranched) paraffin represented the feather-like crystals with proliferating lateral growths. POM obtained from 1,3,5-trioxane in chlorinated paraffin presented numerous crystals of different morphologies. Two main groups could be discerned: one consisted of variations of the basic feather-like crystal, while the other comprised more geometrically triangular and orthorhombic morphologies. All these crystals presented lateral growths, and toward the end of the polymerization a fibrous morphology prevailed. Evidence points to their being crystals of an extended chain structure.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770720
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...