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  • 1
    Electronic Resource
    Electronic Resource
    Rock lobster, Jasus edwardsii (Hutton), growth on opened versus unopened cultured mussel, Mytilus galloprovincialis (Lamarck) (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 29 (1998), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.1998.00233.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reproductive biology of female big-bellied seahorses (2004)
    Oxford, UK; Malden, USA : Blackwell Science Ltd/Inc.
    Journal of fish biology 64 (2004), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In this study, ovarian morphology, reproductive condition and sex steroid levels were investigated in the big-bellied seahorse Hippocampus abdominalis, collected by snorkel and SCUBA diving in Wellington Harbour, New Zealand. Within the ovary, oocytes were contained between an outer muscular wall and an inner layer of luminal epithelium. Two germinal ridges ran along the entire length of the ovary. In cross-section, oocytes were arranged in sequential order of development beginning at the germinal ridges and ending at the mature edge. Ovarian lamellae were absent. Vitellogenic and advanced cortical alveoli oocytes were elongated in shape, whereas maturing oocytes were distinctively pear-shaped. Mature oocytes were large (2·6 – 4·4 mm in length) and aligned with the animal pole towards the muscular wall. Reproductively mature females were found throughout the year indicating a protracted reproductive season. The gonado-somatic index was significantly different between all ovarian stages, but the hepato-somatic index was not. Females with previtellogenic ovaries had significantly higher plasma concentrations of testosterone than females with vitellogenic or maturing ovaries. There was no significant difference in plasma concentrations of testosterone between females with vitellogenic or maturing ovaries, or in plasma concentrations of 17β-oestradiol between females in all ovarian stages. This study contributes to the knowledge on the reproductive biology of female syngnathids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2004.00341.x
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  • 3
    Electronic Resource
    Electronic Resource
    Learning to unwind (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 734-736 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The minichromosome maintenance (MCM) proteins are essential for the initiation and progression of DNA replication in eukaryotes. All eukaryotes possess six different MCMs (MCM2–7) that can form a number of different heteromeric complexes. Helicase activity has only been detected in vitro in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb0905-734
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Perceptual Fading of a Stabilized Cortical Image (1971)
    [s.l.] : Nature Publishing Group
    Nature 233 (1971), S. 204-205 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Neurones of the visual cortex in cat and monkey respond best to line-shaped targets, black or white bars, of a particular orientation and often of a certain width4'5. Many of them have quite large receptive fields on the retina and respond to the same sort of image anywhere within them. There is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/233204a0
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  • 5
    Electronic Resource
    Electronic Resource
    Purification of an MCM-containing complex as a component of the DNA replication licensing system (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 418-421 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RLF is activated during mitosis, and activation can be blocked by protein kinase inhibitors such as 6-dimethylaminopurine (6-DMAP)4 6. We hive designed an assay for RLF, using 6-DMAP to generate Xenopus egg extracts devoid of RLF activity. In the 'licensing ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375418a0
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  • 6
    Electronic Resource
    Electronic Resource
    Hydration of Nafion® studied by AFM and X-ray scattering (2000)
    Springer
    Journal of materials science 35 (2000), S. 5111-5119 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Nafion® is a commercially available perfluorosulphonate cation exchange membrane commonly used as a perm-selective separator in chlor-alkali electrolysers and as the electrolyte in solid polymer fuel cells. This usage arises because of its high mechanical, thermal and chemical stability coupled with its high conductivity and ionic selectivity, which depend strongly on the water content. The membrane was therefore studied in different states of hydration with two complementary techniques: atomic force microscopy (AFM) and small angle X-ray scattering (SAXS) combined with a maximum entropy (MaxEnt) reconstruction. Tapping mode phase imaging was successfully used to identify the hydrophobic and hydrophilic regions of Nafion. The images support the MaxEnt interpretation of a cluster model of ionic aggregation, with spacings between individual clusters ranging from 3 to 5 nm, aggregating to form cluster agglomerates with sizes from 5 to 30 nm. Both techniques indicate that the number density of ionic clusters changes as a function of water content, and this explains why the bulk volumetric swelling in water is observed to be significantly less than the swelling inferred from scattering measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004891917643
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  • 7
    Electronic Resource
    Electronic Resource
    Digital respiratory rate and ventilation recorder (1978)
    Springer
    Medical & biological engineering & computing 16 (1978), S. 337-338 
    Details
    ISSN: 1741-0444
    Keywords: Respiration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442438
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    Paper (German National Licenses)
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