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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 64 (1992), S. 843-847 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 8171-8176 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Coincidence counting methods were used to examine the desorption of secondary ions from a CsI surface via keV atomic and polyatomic projectile impacts. A correlation between the emission of I− and CsI−2 secondary ions was attributed to the common chemical origin of the ions. The degree to which I− and CsI−2 were correlated was observed to change as a function of the kinetic energy and complexity of the primary ion as well as the yield of I−. This is attributed to a change in the relative importance of competing ion formation processes as a function of the energy in the desorption site.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 76 (1969), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 74 (1967), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effects of ovariectomy and oestrogen feedback for 10 days upon pituitary and serum luteinizing hormone (LH) content, pituitary glycoprotein subunit messenger ribonucleic acid (mRNA) and prolactin mRNA content in normal females, female hypogonadal mice and hypothalamic grafted female hypogonadal mice, bearing a graft of normal mouse preoptic area tissue into the third ventricle, have been investigated. In normal females ovariectomy resulted in a rise in serum LH, LHβ-subunit and common α-subunit mRNAs with no significant change in pituitary LH content or follicle-stimulating hormone (FSH) β-subunit mRNA. In the hypogonadal females, preoptic area grafting resulted in an elevation in all of the above parameters into the normal range. Ovariectomy in this group resulted in a further elevation of serum LH, LHβ-subunit and α-subunit mRNAs with no change in pituitary LH content or FSHβ-subunit mRNA, which in all cases were comparable to ovariectomized normal animals. Oestrogen treatment caused a fall in pituitary LH content and the serum LH fell below the detection of the assay. LHβ-subunit and a-subunit mRNA mirrored this fall but there was no change in FSHβ-subunit hybridization. These experiments suggest that even though normal neuronal input to the gonadotrophin-releasing hormone neurons is disrupted, oestrogen-induced negative feedback can still occur in grafted female hypogonadal animals. Gonadotrophin-releasing hormone neurons are reported to lack oestrogen receptors but feedback within this graft by co-transplanting oestrogen-sensitive neurons remains a possibility, as does feedback at the level of the host median eminence where graft axons extend to the pituitary portal vessels. The similarity of the response in normal and grafted animals indicates that these actions of oestrogen may be effected predominantly at the pituitary level.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 14 (1991), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— Recent observations of fatigue cracks bridged by continuous fibers in titanium alloy and titanium aluminide composites are compared to analogous observations in fiber-reinforced ceramics under monotonic loading. Three failure modes have been identified under axial loading in each case: longitudinal failure (failure parallel to the fibers) and noncatastrophic and catastrophic mode I failure (failure normal to the fibers). The criteria for transition from one failure mode to another are reviewed. Models developed previously to describe the failure of fiber-reinforced ceramics are extended to describe the mechanics of mode I fatigue crack growth. The extension is straightforward as long as the fibers do not fail in the crack wake, i.e. the failure mode is noncatastrophic mode I failure.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 1067-1068 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Not all ultraviolet-sensitive mutants are necessarily defective in a DNA repair system, however. Some may occur in which the damage leading to the death of the cell is cytoplasmic rather than nuclear, involving, for example, some lipoprotein membrane system which, by a gene-determined change, has ...
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0428
    Keywords: Type 2 (non-insulin-dependent) diabetes mellitus ; impaired glucose tolerance ; glucose tolerance ; oral glucose tolerance test ; epidemiology ; height ; body mass index ; waist/hip ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a prospective study concerning the pathogenesis of impaired glucose tolerance and Type 2 (non-insulindependent) diabetes mellitus, 346 subjects with no clinical history of diabetes were given a standard 75 g oral glucose tolerance test. The expected positive associations between 120-min plasma glucose concentration and age and body mass index were observed in both sexes and between 120-min plasma glucose and waist/hip ratio in male subjects. An unexpected negative correlation was found between 120-min plasma glucose and height in both sexes (r = − 0.23, (95% confidence interval, − 0.38− − 0.07) p〈0.007 for male subjects and r = − 0.24, (− 0.37− − 0.11) p〈0.006 for female subjects). These negative associations with height remained significant after controlling for age and body mass index in male subjects but not in female subjects. In the latter a highly significant negative relationship of height with age was recorded (r = − 0.33, (− 0.45− − 0.20) p〈0.0001). Comparison between individuals with impaired glucose tolerance and control subjects matched for sex, age and body mass index showed that subjects with impaired glucose tolerance are significantly shorter. Mean (± SEM) height in the male subjects with impaired glucose tolerance (n = 29) was 173.4 ± 1.1 cm vs 176.9 ± 1.3 cm in control subjects, p = 0.02. In the female subjects(n = 39)mean(±SEM)height was 159.4±1.0 cm vs 162.4±1.0 cm in control subjects, p = 0.02. The negative relationship between height and glucose tolerance is a new epidemiological observation which has not been previously reported. One possible reason for this is that the most commonly used anthropometric index, body mass index, eliminates height as an independent analytical variable.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 23 (1968), S. 362-377 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Semen from 16 bulls experimentally infected with foot-and-mouth disease virus (FMDV) was examined for virus content and its ability to produce FMD in heifers by artificial insemination. FMDV appeared in semen of 2 bulls as early as 12 hours after inoculation and, thereafter, virus was found in 58 of 71 semen samples from 16 bulls for as long as 10 days. The highest titer in semen was 105.8 mouse LD50/ml and the titer usually was higher than in urine and sometimes higher than in blood samples taken simultaneously. Five of 16 heifers artificially inseminated with semen from infected bulls and 5 of 10 heifers inseminated with FMDV in various diluents developed FMD. It was concluded that semen of bulls could contain FMDV prior to signs of illness and that the disease could be transmitted by artificial insemination. The dilution and freezing techniques commonly used to preserve semen also favor survival of FMDV. The virus in semen is primarily in the fluid portion, but antiserum added to semen could not be relied upon to eliminate it. The semen of some FMD convalescent bulls apparently contains antibodies.
    Type of Medium: Electronic Resource
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