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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part A: Physiology 105 (1993), S. 231-234 
    ISSN: 0300-9629
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of wildlife research 36 (1990), S. 236-243 
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary During summer and winter the thermoregulation of pheasants was investigated by measuring the rate of oxygen consumption at outside temperatures of −10°, −5°, 0°, 10°, 20°, and 30 °C. The measurements were made with the aid of a respirometer “Spirolyt”. Within the thermoneutral zone the metabolism of the cocks is higher during winter than during summer. The cocks also demonstrate an increase in metabolic rate at temperatures below the thermoneutral zone in summer and in winter. The hens show a lower metabolic rate within the thermoneutral zone during winter. For hens an increase in metabolism at lower outside temperatures as well as a lower critical temperature of the thermoneutral zone can be observed which may be related to the fact that the hens are still growing during summer. The body temperature of the birds increases with higher environmental temperatures. Here no statistical differences between the sexes could be recorded. During the winter body temperatures of the birds are statistically significantly lower than during summer. Pheasants were wetted down to simulate the effects of rain. At an outside temperature of −5 °C the wetted birds showed a clear increase in metabolic rate with a simultaneous decrease in body temperature. Slight wetting of the birds at a temperature of 10 °C produces no changes in the metabolic rate.
    Abstract: Résumé La thermorégulation du Faisan a été étudiée en été et en hiver en relevant la consommation d'Oxygène par des températures externes de −10 (en été −5), 0, 10, 20 et 30 °C. Les mesures ont été effectuées à l'aide du respiromètre »Spirolyt«. Le métabolisme des coqs est, dans la zone thermoneutre, plus élevée en hiver qu'en été. Chez les coqs également, on observe une élévation du métabolisme aux températures situées en deça de la zone thermoneutre, tant en été qu'en hiver. Les poules présentent en hiver, dans la zone thermoneutre, un métabolisme plus faible qu'en été; il en résulte une augmentation du métabolisme à des températures basses et un abaissement de la température critique de la zone thermoneutre, ce qui peut être lié au fait que les poules sont encore en phase de croissance en été. La température corporelle des oiseaux augmente avec celle du milieu ambiant sans qu'il en résulte pour autant des différences statistiques significatives entre le sexes. En hiver, la température corporelle des oiseaux est significativement plus basse qu'en été. Des faisans ont été humectés afin de simuler l'effet de la pluie. Mouillés par une température extérieure de −5 °C, la cadence du métabolisme des oiseaux augmente tandis que la température corporelle des oiseaux diminue. Une faible humidification par une température de 10 °C ne provoque aucun changement dans le rhythme métabolique.
    Notes: Zusammenfassung Im Sommer und im Winter untersuchte man die Thermoregulation der Fasane, indem man das Tempo des Sauerstoffverbrauchs bei Umwelttemperaturen von −10 (im Sommer −5), 0, 10, 20, 30 °C gemessen hat. Die Messungen wurden mit Hilfe des Respirometers „Spirolyt“ vorgenommen. Der Stoffwechsel der Hähne ist in der Thermoneutralzone im Winter höher als im Sommer. Bei den Hähnen tritt eine Erhöhung des Stoffwechsels bei den Temperaturen unter der Thermoneutralzone sowohl im Sommer als auch im Winter ein. Die Hennen haben im Winter einen niedrigeren Stoffwechsel in der Thermoneutralzone als im Sommer. Es erfolgt eine Erhöhung des Stoffwechsels bei den tieferen Umwelttemperaturen und eine tiefere kritische Temperatur der Thermoneutralzone, was damit verbunden sein kann, daß die Hennen im Sommer noch aufwuchsen. Die Körpertemperatur der Vögel steigt mit der Erhöhung der Umwelttemperatur, ohne daß sich dabei wesentliche statistische Unterschiede zwischen Geschlechtern ergeben. Im Winter ist die Körpertemperatur der Vögel statistisch abgesichert tiefer als im Sommer. Fasane wurden befeuchtet, um den Regen zu simulieren. Beim Benässen in der Umwelttemperatur von −5°C wird das Tempo des Stoffwechsels bei der gleichzeitigen Senkung der Körpertemperatur der Vögel deutlich erhöht. Das leichte Benässen in der Temperatur von 10 °C verursacht keine Veränderungen im Tempo des Stoffwechsels.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 8 (1997), S. 485-488 
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract The push-out test of three types of biomaterials: carbon fibre-reinforced carbon (CFRC), hydroxyapatite (HA), and surgical steel (SS) implanted into rabbits’ femurs was carried out. Hydroxyapatite was used as a positive control (good fixation expected in bone) and surgical steel was a negative one (potentially no fixation in bone). Regeneration of bone in contact with all implants was found three months after implantation. The shear strength between CFRC implants and bone was lower than with the HA implants and higher than the shear strength between the surgical steel and bone. Compressive strength of CFRC implants removed after the observation period was significantly lower than the compressive strength of non-implanted samples. It is concluded that the mechanical bonding between the CFRC implants and host tissues exists 3 months after intrabone implantation and is accompanied by a decrease of the strength of implants.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 2017-08-19
    Description: Energy sensitive photon counting X-ray detectors provide energy dependent information which can be exploited for material identification. The attenuation of an X-ray beam as a function of energy depends on the effective atomic number Zeff and the density. However, the measured attenuation is degraded by the imperfections of the detector response such as charge sharing or pile-up. These imperfections lead to non-linearities that limit the benefits of energy resolved imaging. This work aims to implement a basis material decomposition method which overcomes these problems. Basis material decomposition is based on the fact that the attenuation of any material or complex object can be accurately reproduced by a combination of equivalent thicknesses of basis materials. Our method is based on a calibration phase to learn the response of the detector for different combinations of thicknesses of the basis materials. The decomposition algorithm finds the thicknesses of basis material wh...
    Electronic ISSN: 1748-0221
    Topics: Physics
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  • 5
    Publication Date: 2013-11-20
    Description: Multi-energy (ME) detectors are becoming a serious alternative to classical dual-energy sandwich (DE-S) detectors for X-ray applications such as medical imaging or explosive detection. They can use the full X-ray spectrum of irradiated materials, rather than disposing only of low and high energy measurements, which may be mixed. In this article, we intend to compare both simulated and real industrial detection systems, operating at a high count rate, independently of the dimensions of the measurements and independently of any signal processing methods. Simulations or prototypes of similar detectors have already been compared (see [1] for instance), but never independently of estimation methods and never with real detectors. We have simulated both an ME detector made of CdTe - based on the characteristics of the MultiX ME100 and - a DE-S detector - based on the characteristics of the Detection Technology's X-Card 1.5-64DE model. These detectors were compared to a perfect spectroscop...
    Electronic ISSN: 1748-0221
    Topics: Physics
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  • 6
    Publication Date: 2014-02-19
    Description: Author(s): A. Lemarchand, J. Gorecki, A. Gorecki, and B. Nowakowski We perform the stochastic analysis of a thermochemical system using a master equation which describes a chemical reaction and includes discrete and continuous temperature jumps. We study the time evolution of the system selecting the temperature of the thermostat as an easily tunable control paramet... [Phys. Rev. E 89, 022916] Published Tue Feb 18, 2014
    Keywords: Nonlinear Dynamics and Chaos
    Print ISSN: 1539-3755
    Electronic ISSN: 1550-2376
    Topics: Physics
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  • 7
    Publication Date: 2021-10-22
    Description: Plasmids have the potential to transfer genetic traits within bacterial communities and thereby serve as a crucial tool for the rapid adaptation of bacteria in response to changing environmental conditions. Our knowledge of the environmental pool of plasmids (the metaplasmidome) and encoded functions is still limited due to a lack of sufficient extraction methods and tools for identifying and assembling plasmids from metagenomic datasets. Here, we present the first insights into the functional potential of the metaplasmidome of permafrost-affected active-layer soil—an environment with a relatively low biomass and seasonal freeze–thaw cycles that is strongly affected by global warming. The obtained results were compared with plasmidderived sequences extracted from polar metagenomes. Metaplasmidomes from the Siberian active layer were enriched via cultivation, which resulted in a longer contig length as compared with plasmids that had been directly retrieved from the metagenomes of polar environments. The predicted hosts of plasmids belonged to Moraxellaceae, Pseudomonadaceae, Enterobacteriaceae, Pectobacteriaceae, Burkholderiaceae, and Firmicutes. Analysis of their genetic content revealed the presence of stress-response genes, including antibiotic and metal resistance determinants, as well as genes encoding protectants against the cold.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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