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  • Articles: DFG German National Licenses  (31)
  • Electronic Resource  (31)
  • 1995-1999  (16)
  • 1970-1974  (15)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 4056-4059 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The activities of mitochondrial hexokinase and adenylate kinase have been measured in various osmotic conditions. Sucrose, potassium chloride and ammonium acetate were used as solutes. The total hexokinase activity of mitochondrial suspensions increased steadily with decreasing osmolarity of the sucrose or salt solutions. The hexokinase activity of mitochondrial suspensions in water was 93 per cent of that measured in the presence of Triton X-100.The increase in hexokinase activity was irreversible even after very short exposure (90 s) to hypo-osmotic conditions. Total adenylate kinase activity was not affected by osmotic conditions. Adenylate kinase activity increased hyperbolically in supernatants prepared from mitochondrial suspensions with decreasing osmolarity of the sucrose or salt solutions. Besides monitoring adenylate kinase leakage as a measure of outer mitochondrial membrane disruption, mitochondrial swelling was followed by measurement of the turbidity of mitochondrial suspensions at 520 nm. The data has been interpreted in terms of binding of some hexokinase to the inner mitochondrial membrane.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 30 (1999), S. 0 
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: This paper reports on a 4 × 4 factorial design experiment conducted to examine the combined effects of temperature and salinity on embryonic development and growth and survival of black-lip pearl oyster, Pinctada margaritifera (L.) larvae. The temperatures used were 20 °C, 25 °C, 30 °C and 35 °C, and the salinities were 25°/oo, 30°/oo, 35°/oo and 40°/oo. Response surface contour diagrams were generated from the survival and growth data to estimate optimal conditions. Normal development of embryos occurred only from 25 °C to 30 °C. The optimal conditions for maximum survival and growth were 26–29 °C and 28–32°/oo. Temperatures of 35 °C or greater were lethal for larvae and, at all temperatures tested, larval growth and survival were lowest at a salinity of 40°/oo.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Here we report the application of high-density oligonucleotide array (DNA chip)-based analysis to determine the distant history of single nucleotide polymorphisms (SNPs) in current human populations. We analysed orthologues for 397 human SNP sites (identified in CEPH pedigrees from Amish, ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 36 (1997), S. 328-329 
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 127 (1996), S. 1173-1187 
    ISSN: 1434-4475
    Keywords: Acetyl anthracenes ; 2D NOESY NMR of anthracenes ; β-Oxo-anthracenepropionate ; β-Oxo-dicarbonyl-compounds ; Thiophenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary β-Oxo-1-anthracenepropionate (3) reacts step by step with phenylisothiocyanate and α-CH-acidic halo compounds to keten-S,N-acetals4, followed by cyclocondensation to give the 4-(1-anthracenyl)-thiophene-3-carboxylates5. In contrast, the reaction of β-oxo-9-anthracenepropionate (6) with isothiocyanates and α-CH-acidic halo compounds yields 5-acyl-2-amino-3-(9-anthracenoyl)-4-hydroxy-thiophenes8. This is caused by the sterical hindrance of the keto group of the anthracene in position 9; thus, the cyclocondensation proceedsvia reaction of the ester group of the β-oxo-propionate. In the same way, 9-acetylanthracene reacts with phenylisothiocyanate and α-CH-acidic compounds to keten-S,N-acetals10 and, in an additional step, to 2-anilino-3-(9-anthracenoyl)-thiophenes11 and 2-(9-anthracenoyl)-methylene-3,4-diphenyl-2,3-dihydro-(1,3)-thiazole12, respectively. The structure of all new compounds was determinated by 2D NOESY NMR spectroscopy.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Annals of oncology 10 (1999), S. 281-287 
    ISSN: 1569-8041
    Keywords: biology ; prevention ; treatment of malignancies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 55 (1995), S. 404-411 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Biology and fertility of soils 27 (1998), S. 127-131 
    ISSN: 1432-0789
    Keywords: Key words Soil microbial biomass ; Soil enzymes ; Sugar cane ; North Queensland ; Long-term monoculture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  As part of a broader study, the aim of which is to identify soil factors that might be associated with yield decline of sugar cane, microbial biomass and protease activities were examined in soil samples collected from seven paired old and new land sites in three cane-growing districts of north Queensland. No consistent changes in soil protease activities were observed, although some sites exhibited specific effects, as a result of extensive periods of sugar cane monoculture. Soil microbial biomass, however, was significantly lower in those soils where sugar cane had been grown for extended periods. The implications of a lowering of soil microbial biomass on sugar cane yields and sustainability are discussed.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1433-0458
    Keywords: Schlüsselwörter Schwerhörigkeit ; Implantierbare Hörgeräte ; Elektronisches Hörimplantat ; TICA ; Key words Sensorineural hearing loss ; Implantable hearing aid ; Electronic hearing implant ; TICA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Recently, Zenner et al. implanted the first totally implantable electronic hearing devices in patients with SNHL (HNO 46 [1998] 844–852). In the present report, technical and audiological features of the implant TICA are published. The development of the piezoelectric transducer and the microphone for implantation in the posterior wall of the auditory canal as components for the present fully implantable hearing system has already been described (HNO 45, 1997, 792–880). Here we report about our experience with the electronic main module that completes the TICA LZ 3001 system. This module is suited for implantation in the mastoid bone and contains the signal-processing electronics and an integrated battery that can be recharged transcutaneously with a portable charger. The recharging time is around 2 h for an implant operating time of 50h. The microphone and transducer connectors allow for easy replacement of the main module when the battery lifetime is reached. This lifetime is around 3–5 years. A small wireless remote control allows volume adjustment, contains an on/off switch, and permits selection of four different individual hearing programs. The basic audiological features are provided by a flexible, digitally programmable 3-channel-AGC-system with a peak clipping function. The total bandwidth is around 10 kHz. To our knowledge this is the first fully implantable hearing system that has been in implanted in humans.
    Notes: Zusammenfassung Kürzlich wurde über die Entwicklung eines elektromechanischen, piezoelektrischen Wandlers und eines Mikrofons zum subkutanen Einbau in die hintere Gehörgangswand als Komponenten eines zukünftigen vollständig implantierbaren Hörsystems für Innenohrschwerhörige berichtet (HNO 45, 1997, 792–880). Zwischenzeitlich konnte die Entwicklung eines elektronischen Hauptmoduls zur Implantation auf dem Planum mastoideum abgeschlossen werden, das diese Mikrofone und Wandler zu dem kompletten Hörimplantat TICA® LZ 3001 ergänzt. Dieses Hauptmodul enthält neben der signalverarbeitenden Elektronik eine spezielle Batterie, die transkutan mit einem portablen Ladegerät nachgeladen wird. Nach einer Volladung, die ca. 2 h benötigt, ist das Implantat für rund 50 h kontinuierlich betriebsbereit. Das Ladegerät wird ähnlich wie bei Mobiltelefonen in einer netzbetriebenen Station nachgeladen. Lösbare Steckverbindungen zu Mikrofon und Wandler ermöglichen den einfachen operativen Austausch des Hauptmoduls, wenn die Batterielebensdauer erreicht ist. Dies wird nach ca. 3–5 Jahren erwartet. Dem Patienten steht eine kleine, drahtlose Fernbedienung zur Verfügung, mit der Lautstärke, Ein/Aus sowie 4 Hörprogramme für unterschiedliche Hörsituationen eingestellt werden können. Die grundlegenden audiologischen Eigenschaften sind durch ein flexibel digital programmierbares 3-Kanal-AGC-System mit Peak-clipping-Funktion gegeben. Die gesamte Übertragungsbandbreite beträgt ca. 10 kHz. Das vollimplantierbare Hörsystem wurde im Rahmen der klinischen Erprobung Anfang Juni 1998 erstmals am Menschen angewendet.
    Type of Medium: Electronic Resource
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