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  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 25 (1963), S. 325-360 
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 313-314 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Since poly-p-hydroxybutyrate (PHBA) is synthesized from carbon dioxide and water in hydrogen-oxidizing bacteria5, it became possible to investigate the fixation of carbon dioxide into this storage material by Hydrogenomonas spec. W under controlled physiological conditions and excluding all ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 17 (1964), S. 622-622 
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 a, The construction of pALlOSO. The part of the T-DNA of pTiAchS present on pOTYS is shown in the bottom right-hand corner. pOTYS was constructed from subclones of BamHl fragment 8 and Hindlll fragment 1, using pJDB 207 as a vector plasmid. For pALlOSO, R772 and pOTYS, the restriction sites ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 300 (1982), S. 621-623 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In many nickel-based alloys the high-temperature strength is provided by the y' precipitate based on Ni3Al, an ordered phase with the L12 structure. The flow stress of the y' phase reaches a peak value at about 700 C. Several theories have been put forward to explain this anomalous behaviour3 with ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 314-316 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Quartz, the second most abundant crustal mineral, is important in the study of deformation within the Earth's crust. Plastically deformed quartz has therefore been the subject of numerous studies3'5 from which two significant findings have emerged: (1) quartz deforms by dislocation creep mechanisms ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 46 (1963), S. 44-52 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Washed suspensions of Hydrogenomonas strain H 16 oxidizing molecular hydrogen and assimilating carbon dioxide accumulate poly-β-hydroxybutyric acid intracellularly; the time dependent incorporation of 14CO2 into different cell fractions has been investigated. Ethanolextracts were fractionated into a steam-volatile and an ether-soluble fraction and the residue.
    Notes: Zusammenfassung An gewaschenen Suspensionen von Hydrogenomonas Stamm H 16, die während der Oxydation von molekularem Wasserstoff Kohlendioxyd fixieren und Poly-β-hydroxybuttersäure intracellulär anhäufen, wurde die Zeitabhängigkeit des Einbaus von 14CO2 in verschiedene Zellfraktionen untersucht. Die Äthanolextrakte wurden in eine wasserdampf-flüchtige, eine ätherlösliche und die Rückstands-Fraktion aufgetrennt.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 46 (1963), S. 53-78 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary The production, preparation, and analysis by paperchromatography of 14C-labeled extracts from cells of Hydrogenomonas H 16 storing poly-β-hydroxybutyric acid (PHBS) is described and discussed. Some chromatographical solvent systems were compared, especially with one proposed by Metzner (1960). Rf-values of important intermediates and phosphate ester position constants were determined. Separation by paperchromatography of sugars, amino acids, and hydroxamic acids was tested in various systems. Sprays for these compounds, as well as for organic acids and phosphate esters, were compared and their colour reactions described. Chromatograms of extracts from Hydrogenomonas H 16 and Chlorella pyrenoidosa after incorporation of 14CO2 in short time experiments under comparable conditions showed labelling patterns different from each other. In the case of Hydrogenomonas, 63% of the activity fixed was found in the phosphate esters, mainly in hexose monophosphates (incl. sedoheptulose-7-phosphate), phosphoglyceric acid, and AMP. The phosphate esters of Chlorella contained 95% of the activity fixed, the bulk of which appeared in phosphoglyceric acid, triose phosphate and phosphoenolpyruvic acid. Much less was found in the hexose monophosphates. Some organic and amino acids such as malic, citric, succinic, fumaric glutamic acid and alanine of the Hydrogenomonas extracts were rather heavily labelled, while this was not the case with Chlorella.
    Notes: Zusammenfassung Die Gewinnung, Aufbereitung und papierchromatographische Analyse 14C-markierter Extrakte aus PHBS-speichernden Zellen von Hydrogenomonas H 16 wird beschrieben und diskutiert. Einige chromatographische Trennsysteme wurden verglichen, insbesondere mit dem von Metzner (1960) vorgeschlagenen System. Rf-Werte wichtiger Intermediärverbindungen und Positionskonstanten von Phosphatestern wurden ermittelt. Für die papierchromatographische Trennung von Zuckern, Aminosäuren und Hydroxamsäuren sowie für organische Säuren und Phosphatester wurden zweckmäßige Systeme angegeben, Sprühmittel verglichen und Farbreaktionen beschrieben. Chromatogramme von Extrakten aus Hydrogenomonas H 16 und Chlorella pyrenoidosa, die 14CO2 im Kurzzeitversuch unter vergleichbaren Bedingungen eingebaut hatten, zeigten voneinander verschiedene Markierungsmuster. Unter den Phosphatestern sind bei Hydrogenomonas (nur 63% des fixierten 14C) vorwiegend Hexosemonophosphate, Sedoheptulose-7-phosphat, Phosphoglycerinsäure und AMP markiert, bei Chlorella (95% des fixierten 14C) hauptsächlich Phosphoglycerinsäure, Triosephosphat und Phosphoenolbrenztraubensäure. Bei Hydrogenomonas waren einige organische Säuren und Aminosäuren (Äpfelsäure, Citronensäure, Bernsteinsäure, Fumarsäure, Glutaminsäure, Alanin u.a.) relativ stark markiert, die bei Chlorella kaum oder nicht radioaktiv waren.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 46 (1963), S. 79-95 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary The following early labeled compounds resulted from 14CO2-fixation by chemolithotrophically grown washed cells of Hydrogenomonas strain H 16 under hydrogen-oxygen-atmosphere: 3-phosphoglycerate, acetate and malate as well as other phosphate-esters and organic acids. After 34 secs of 14CO2-fixation additionally the following compounds were radiochromatographically identified: pentose-, hexose- and heptulose-phosphates, phosphoglycolate, citrate, fumarate, succinate, lactate, and glutamate. Under the conditions of PHBS accumulation CO2 appears to be fixed predominantly via the reactions of the reductive pentosephosphate-cycle; malate is possibly the endproduct of a second CO2-fixation. Under air with succinate as a substrate the same suspensions fixed CO2 at a lower rate (13%), however following the same path. During fixation under heterotrophic conditions radiocarbon was found to accumulate in succinate, α-ketoglutarate and malate. Organotrophically grown cells fixed carbon dioxide by the same reactive mechanism, although at a very low rate (3%).
    Notes: Zusammenfassung Als frühzeitig markierte Verbindungen der 14CO2-Fixierung durch chemolithotroph gewachsene, gewaschene Zellen von Hydrogenomonas Stamm H 16 unter Knallgasatmosphäre wurden 3-Phosphoglycerinsäure, Essigsäure und Äpfelsäure sowie weitere Phosphatester und organische Säuren nachgewiesen. Nach 34 sec 14CO2-Einbau ließen sich radioautographisch außerdem Pentose-, Hexose- und Heptulosephosphate, Phosphoglykolsäure, Citronensäure, Fumarsäure, Bernsteinsäure, Milchsäure, Glutaminsäure und andere Verbindungen identifizieren. Unter den Bedingungen der PHBS-Speicherung scheint Kohlendioxyd vorwiegend über die Reaktionen des reduktiven Pentosephosphatcyclus fixiert zu werden; Äpfelsäure ist wahrscheinlich das Produkt einer zweiten Fixierungsreaktion. Unter Luft mit Bernsteinsäure als Substrat fixierten dieselben Suspensionen 14CO2 zwar mit geringerer Geschwindigkeit (13%), jedoch zunächst über dieselben Reaktionswege. Im Laufe der Fixierung reicherte sich 14C in Bernsteinsäure, α-Ketoglutarsäure und Äpfelsäure an. Auch organotroph gewachsene Zellen fixierten CO2 auf demselben Reaktionsweg, wenn auch mit sehr geringer Rate (3%).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 132 (1982), S. 96-99 
    ISSN: 1432-072X
    Keywords: Hyphomicrobium ; Continuous culture ; Synchronization technique ; Synchronous swarmer cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A technique was developed for synchronization ofHyphomicrobium sp. strain B-522. Bacteria were grown in continuous culture with methanol (0.1%; v/v) growth limiting. Vitamin B12 (2.5 μg/l) was necessary to obtain steady state growth. The critical dilution rate wasD c =0.112; maximum cell output occurred atD=0.105 (Dx=30 mg l-1 h-1). Continuous cultures ofHyphomicrobium B-522 atD=0.110 were used to obtain cells for synchronization experiments. Synchronization was achieved by trapping young hyphal and budding cells in a glass wool column, while the initial swarmer cells were allowed to pass through. By semicontinuously rinsing the system, newly produced swarmers could be sampled in the effluent. The mean length of these synchronous swarmer cells was 1.25 μm (s=±0.13 μm; range 0,6 μm) as compared to 1.40 μm (s=±0.21 μm; range 1.2 μm) for swarmer cells of the continuous culture. Division of synchronous swarmer populations was completed after 7 h; the synchronization index was 0.76.
    Type of Medium: Electronic Resource
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