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  • 1
    Electronic Resource
    Electronic Resource
    Growth hormone (GH) and GH-releasing hormone response to ACTH 1–17 at different times of day. Evidence of a circadian stage dependence (1990)
    Springer
    European journal of clinical pharmacology 38 (1990), S. 149-152 
    Details
    ISSN: 1432-1041
    Keywords: GH ; GH-RH ; ACTH 1–17 ; Circadian rhythm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of injection of ACTH 1–17 on the secretion of GH has been examined at three different circadian stages (07, 14 and 21 h) in the winter. Each week for six consecutive weeks the subjects were investigated before and after I. M. injection either of saline (controls) or 100 μg ACTH 1–17. Each subject was his own control. The peak plasma concentration of GH was always found 40 min after the injection. The larger absolute increase and the greater AUC curve were seen following the injections at 14.00 h and 21.00 h. The findings could not be attributed to an effect on GH-RH, since secretion of it remained unchanged during the test.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265974
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  • 2
    Electronic Resource
    Electronic Resource
    Dissociation energies of tellurium cluster ions from thermoevaporation experiments (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 6631-6636 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dissociation of tellurium cluster ions containing up to 40 atoms has been studied using unimolecular decay of thermoexcited clusters. Clusters with less than 10 atoms dissociate mainly by Te2 loss. Larger clusters fragment by loss of Te5, Te6, or Te7 species. As the cluster size increases, Te5 loss becomes the predominent channel, showing a dissociation which smoothly evolves to the bulk behavior. The dissociation energies of mass selected Te+n, with n=5–35, are deduced from the relative branching ratios of the competitive fragmentation channels. The changes in the observed neutral products are correlated to changes in the dissociation energies which are minima for cluster ion parents containing 13–25 atoms. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470392
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  • 3
    Electronic Resource
    Electronic Resource
    Modelling carbon and nitrogen dynamics in a bare soil with and without straw incorporation (2003)
    Oxford, UK : Blackwell Science Ltd
    European journal of soil science 54 (2003), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Incorporating straw into the ploughed layer of soil affects the dynamics of carbon and nitrogen. A precise quantification of its short-term effect in agricultural fields is difficult because biological and physical processes interact and take place simultaneously. As an alternative to experimentation, investigations have turned to simulations using mechanistic models, and we have taken this approach. The goal of our study was to test a mechanistic and one-dimensional model of transport and biotransformation (PASTIS) against a data set obtained in a field experiment in northern France. We tested carbon and nitrogen dynamics by measuring C mineralization rates, the rates of gross immobilization and mineralization of N (using 15N tracing), and inorganic pools of N in the soil profile during 1 year in a bare soil with or without addition of wheat straw. Most of the model parameters were determined in independent experiments. We estimated the biological parameters from incubation experiments in the laboratory. The simulated results were in good agreement with experimental data, particularly for gross N rates. Hypotheses concerning the pathway of microbial assimilation and the dependence of decomposition on the size of the biomass were tested. The simulated net N immobilization due to addition of straw (8000 kg dry matter ha−1) reached a maximum of 64 kg N ha−1 after 2 months, whereas the observed value was 66 kg N ha−1. The model indicated that after 13 months the incorporation of straw had reduced the net amount of nitrogen mineralized by 13% and the amount of leached nitrate by 27%. The sensitivity analysis to the depth of straw incorporation indicated that the deeper was the incorporation the less was the leaching and the mineralization of nitrogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2389.2003.00499.x
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  • 4
    Electronic Resource
    Electronic Resource
    Evaluation of a nitrogen transport and transformation model in a bare soil (2001)
    Oxford, UK : Blackwell Science Ltd
    European journal of soil science 52 (2001), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Simulation models are useful tools to understand the interaction between the transformation and the transport of nitrogen in the field. This study was done to calibrate, test and analyse a mechanistic, one-dimensional model that describes the transport and transformations of nitrogen in the soil. The physical module describes transport of water, heat and solute, and the biological module simulates transformations of C and N with a restricted number of measurable organic pools. The calibration was based mainly on laboratory experiments independent of those used to evaluate the model. The evaluation procedure used field data collected on a bare loamy soil. The profiles of water content, water potential, temperature, chloride and nitrate (15N-labelled and unlabelled) concentrations were measured from 0 to 150 cm continuously for 1 year. Simulated results were in good agreement with experimental data. However, some discrepancies were noticeable for chloride and nitrate concentrations in the deep layers. These differences were probably due to an underestimation of mass transport in the deep layers. A sensitivity analysis was carried out to determine the response to changes in some parameters in terms of mineralization, leaching and model efficiency. Mineralization is more sensitive to biological factors whereas nitrate leaching is more sensitive to initial and boundary conditions and hydraulic parameters. The experiment ran for only 1 year, which was too short a time to test biological factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2389.2001.00374.x
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  • 5
    Electronic Resource
    Electronic Resource
    Monoxyde quadratique PbOα(I): Description de la transition structurale ferroe'lastique
    Amsterdam : Elsevier
    Journal of Solid State Chemistry 57 (1985), S. 343-350 
    Details
    ISSN: 0022-4596
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-4596(85)90197-5
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  • 6
    Electronic Resource
    Electronic Resource
    Quasielastic neutron scattering study of proton motions in chemical and electrochemical PbO"2 oxides
    Amsterdam : Elsevier
    Solid State Ionics 28-30 (1988), S. 1352-1356 
    Details
    ISSN: 0167-2738
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-2738(88)90386-4
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  • 7
    Electronic Resource
    Electronic Resource
    Cometabolic biodegradation of methyl t-butyl ether by Pseudomonas aeruginosa grown on pentane (1999)
    Springer
    Applied microbiology and biotechnology 51 (1999), S. 498-503 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A bacterial strain identified as Pseudomonas aeruginosa was isolated from a soil consortium able to mineralize pentane. P. aeruginosa could metabolize methyl t-butyl ether (MTBE) in the presence of pentane as the sole carbon and energy source. The carbon balance for this strain, grown on pentane, was established in order to determine the fate of pentane and the growth yield (0.9 g biomass/g pentane). An inhibition model for P. aeruginosa grown on pentane was proposed. Pentane had an inhibitory effect on growth of P. aeruginosa, even at a concentration as low as 85 μg/l. This resulted in the calculation of the following kinetic parameters (μmax = 0.19 h−1, K s = 2.9 μg/l, K i = 3.5 mg/l). Finally a simple model of MTBE degradation was derived in order to predict the quantity of MTBE able to be degraded in batch culture in the presence of pentane. This model depends only on two parameters: the concentrations of pentane and MTBE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530051423
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  • 8
    Electronic Resource
    Electronic Resource
    Etude des transitions de phase du sulfate dibasique de plomb PbSO4, 2PbO: Influence de la vitesse de montee en temperature et de L'histoire thermique (1987)
    Springer
    Journal of thermal analysis and calorimetry 32 (1987), S. 79-90 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Basisches Bleisulfat PbSO4·2PbO wurde mittels DTA, Röntgendiffraktometrie und Scanningelektronenmikroskopie untersucht. DTA-Versuche mit unterschiedlichen Aufheizgeschwindigkeiten haben gezeigt, da\ PbSO4·2PbO auf zwei verschiedene Weisen thermisch gebildet werden kann. Bei¯T〈40
    Abstract: РЕжУМЕ с пОМОЩьУ ДтА, РЕНтгЕН О-стРУктУРНОгО АНАлИ жА И скАНИРУУЩЕИ ЁлЕктРО ННОИ МИкРОскОпИИ ИжУЧЕНО тЕРМИЧЕскОЕ пОВЕДЕН ИЕ ОсНОВНОгО сУльФАтА сВИНцА PbSO4·2PbO. Д тА ИсслЕДОВАНИь пОкАжА лИ, ЧтО В жАВИсИМОстИ О т скОРОстИ НАгРЕВА, пРОИсхОДИт Д ВА тИпА пРЕВРАЩЕНИИ. пРИ скОР ОстИ НАгРЕВА МЕНьшЕ 40
    Notes: Abstract Basic lead sulfate, PbSO4·2PbO, was studied by means of DTA, X-ray diffraction and scanning electron microscopy. DTA runs at different heating rates showed that two kinds of thermal evolution are possible for PbSO4·2PbO. IfT〈40 deg h−1, we have the “normal” process according to the following transitions: IfT〉40 deg h−1 theΒ-PbSO4·2PbO phase appears at 440
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914550
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  • 9
    Electronic Resource
    Electronic Resource
    Polymorphism of crystalline phases of calcium stearate (1988)
    Springer
    Journal of materials science 23 (1988), S. 3225-3231 
    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 The structures of the low temperature (T⩽400 K) phases of calcium stearate have been investigated by X-ray diffraction. Several forms are shown to exist at room temperature, depending on hydration and thermal treatment. New transitions at cryogenic temperatures are discussed. Transitions at higher temperatures have been investigated together with their reversibility. Thermogravimetry and two calorimetric techniques have been used as a complement. This data completes the already somewhat complex picture of the phase transitions of calcium stearate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551298
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  • 10
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    LEAPT: Lectin-directed enzyme-activated prodrug therapy (2004)
    National Academy of Sciences
    Details
    Publication Date: 2004-09-24
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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