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  • 1995-1999  (42)
  • 1960-1964
  • 1996  (42)
  • 1
    ISSN: 1439-6327
    Keywords: Carnitine ; Endurance exercise ; Ergogenic ; Marathon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A double-blind crossover field study was performed to investigate the effects of acute L-carnitine supplementation on metabolism and performance of endurance-trained athletes during and after a marathon run. Seven male subjects were given supplements of 2 g L-carnitine 2 h before the start of a marathon run and again after 20 km of the run. The plasma concentration of metabolites and hormones was analysed 1 h before, immediately after and 1 h after the run, as well as the next morning after the run. In addition, the respiratory exchange ratio (R) was determined before and at the end of the run, and a submaximal performance test was completed on a treadmill the morning after the run. The administration of L-carnitine was associated with a significant increase in the plasma concentration of all analysed carnitine fractions (i.e. free carnitine, short-chain acylcarnitine, long-chain acylcarnitine, total acid soluble carnitine, total carnitine) but caused no significant change in marathon running time, in R, in the plasma concentrations of carbohydrate metabolites (glucose, lactate, pyruvate), of fat metabolites (free fatty acids, glycerol, β-hydroxybutyrate), of hormones (insulin, glucagon, cortisol), and of enzyme activities (creatine kinase, lactate dehydrogenase). Moreover, there was no difference in the result of the submaximal performance test the morning after the run. In conclusion, acute administration of L-carnitine did not affect the metabolism or improve the physical performance of the endurance-trained athletes during the run and did not alter their recovery.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 2779-2783 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the fabrication and physics of mesa-etched light-emitting diodes (LEDs) made from GaN p-n junctions grown by molecular beam epitaxy. Rapid thermal annealing was found to improve the electrical properties of these LEDs. Annealed LEDs turn on at 4 V, exhibit an on-series resistance of approximately 14 Ω, and have only 36 μA of leakage current for reverse bias levels as high as 10 V. Electroluminescence (EL) spectra obtained from devices driven to 15 mA are dominated by a peak at 400 nm, which is attributed to recombination between shallow donors and Mg luminescent centers on the p side of the junction. The full width at half maximum of this peak is only 30 nm, which, to the best of our knowledge, is the narrowest EL peak measured from a GaN p-n junction LED. In other devices, recombination was found to proceed through defect states in the middle of the band gap. The broad emission from these LEDs can be shifted from the orange to the violet spectral region by adjusting the drive current. In addition, these LEDs withstand dc current densities in excess of 700 A/cm2 at room temperature. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 2615-2617 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Time-resolved Faraday rotation measurements on a nanosecond time scale are performed for Cd1−xMnxTe samples grown by two different techniques. The dependence of the observed photoinduced dynamics on the purity, Mn++ concentration (x=0.03, 0.10, 0.15, 0.3), excitation density, and temperature (100–290 K) reveals several novel features. The relaxation for pure samples is monoexponential at 100 K and is slowing down with increasing temperature, in strong contrast to impure samples, where the opposite behavior is observed. All experimental observations can be well explained in a simple model based on rate equations for the free-carrier populations, provided that recombination centers and impurity traps are included in the model. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 26 (1996), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Some studies in the literature have supported, while others have denied, the relationship between results of delayed hypersensitivity skin tests (DHST), renal allograft and patient survival rates. Several factors contribute to the unreliability of these studies. For example, most of these studies were performed in the precyclosporine era, furthermore, other variables which influence renal allografts and patient survival rates were not controlled in those studies.Objective The purpose of this study was to investigate the relationship between results of DHST performed in the pretransplant period with the subsequent renal transplant outcome in the cyclosporine era.Methods The study included 103 first cadaveric renal transplant recipients. DHST were performed during pretransplant evaluation by intradermal injections of a battery of recall antigens. Based on skin-test results, the patients were assigned to two groups —those with a positive skin test (STP+) and those with a negative (anergic) skin test. These two groups were compared with each other regarding allograft survival, patient survival, and other variables known to influence survival rates.Results The mean age, sex and racial distribution, degree of HLA matches between recipients and donors, number of acute rejection episodes, and number of patients with acute tubular necrosis were similar between the two groups. Renal allograft survival rates in the anergic group at 6 months, 1 year, 2 years, and 3 years were 97%, 90% 84%, and 57%, respectively. The survival rate for renal allografts in the STP+ group for the same time points was 90%, 86%, 80%, and 72%, respectively. Patient survival rates for the anergic group at 6 months, 1 year, 2 years, and 3 years were 95%, 94%, 89%, and 85%, respectively, while those for the STP+ group were 98%, 98%, 98%, and 97% respectively. Differences between the STP+ and anergic groups, with regard to patient and allograft survival rates, were not significant.Conclusion We conclude that DHST is not helpful in predicting outcome of patient or renal allograft survival rates over a 3-year time period.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of nursing practice 2 (1996), S. 0 
    ISSN: 1440-172X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Emancipatory action research was used to assist four women in developing an understanding of the feelings and reactions associated with urinary incontinence. The four participants initially expressed feelings of anger, embarrassment and frustration towards their urinary incontinence, perceiving it as a threat to their self-esteem. Through reflection they discovered that they held several misconceptions about urinary incontinence. They believed that it was a result of childbirth and ageing, and that little to nothing could be done to treat it. During the study, which took place over a period of 5 months, the women's level of knowledge, confidence and trust increased leading to the formulation of new insights. This enabled them to actively deal with their concerns and to initiate change. The resulting action plans incorporated conservative treatment plans and the development of a support group. Six weeks after commencement of the study, three of the four women regained continence. The fourth participant reported a significant improvement in both frequency of incontinence episodes and quality of life.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of political philosophy 4 (1996), S. 0 
    ISSN: 1467-9760
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Philosophy , Political Science
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 59-65 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The defect structure of calcium-stabilized zirconia (CSZ) is described in terms of a correlated distribution of microdomains within the cubic matrix of CSZ. The defect structure consists of two types of defects: microdomains based on a single oxygen vacancy with relaxed neighbouring ions and microdomains based on a pair of oxygen vacancies separated by 3 1/2/2a along 〈111〉. The combined evaluation of neutron and X-ray data shows that the previously published structure of the single vacancy domain has to be modified: All cations next to the oxygen vacancy are most likely zirconium. This modified model leads to good agreement between observed and calculated neutron and X-ray diffraction patterns.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 66-71 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The temperature dependence of disorder diffuse scattering of calcium-stabilized zirconia was measured with neutron and X-ray scattering methods up to 1500 K. A quantitative interpretation of the diffuse scattering is given in terms of a correlated distribution of two types of microdomains. A pronounced decrease of the integrated intensity of the diffuse maxima was found in the temperature range 1250–1300 K in both neutron and X-ray cases. However, the half-width of the diffuse maxima and the corresponding correlation length shows a different temperature behaviour. The neutron data indicate an almost constant correlation length as a function of temperature, whereas the X-ray data show a maximum at 1170 K. A tentative interpretation is given.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Kybernetes 25 (1996), S. 130-134 
    ISSN: 0368-492X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Computer Science
    Notes: Outlines some of the different ways of analysing economic systems. Considers the econometric way of research does not explain fully and adequately the economic activity. Believes that a better and more adequate method of investigation would be through the introduction of cybernetic models and methods. Presents as an example a linear aggregative model of simple Keynesian form and contrasts the cybernetical approach with the conventional one. Discusses the choice between these approaches and the advantages and disadvantages of their implementation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York : Cambridge University Press
    Social philosophy & policy 13 (1996), S. 181-211 
    ISSN: 0265-0525
    Source: Cambridge Journals Digital Archives
    Topics: Philosophy , Political Science , Sociology
    Notes: We live in an age of great scientific and technological innovation, and what seemed out of the question or at least very doubtful only a few years ago, today lies almost within our grasp. In no area is this more true than that of human health care, where lifesaving and life-enhancing technologies have given, or have the enormous potential in the not so distant future to give, relief from some of the most terrible human illnesses. On two fronts in particular, xenograft or cross-species transplantation and genetic engineering of animals on behalf of gene therapy in humans, such relief appears very promising, if not actually on the horizon. Certainly, extensive research work on both fronts is underway both in the United States and abroad.
    Type of Medium: Electronic Resource
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