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  • 1
    Electronic Resource
    Electronic Resource
    Windsor Castle: Photogrammetric And Archaeological Recording After The Fire (1995)
    Oxford UK and Boston, USA : Blackwell Publishers Ltd.
    The @photogrammetric record 15 (1995), S. 0 
    Details
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Following the disastrous fire in the State Apartments at Windsor Castle in 1992, a programme of photogrammetric surveying followed by archaeological recording was carried out by English Heritage. This paper details the background to this work, the provision of the photogrammetric surveys and the use and analysis of the data by the archaeology team.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/0031-868X.00028
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen Hydride as a Possible Stratospheric Constituent (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 35-36 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As part of a programme to improve spectroscopic photometric methods of measuring ozone we have made a precision spectrophotometer which measures, essentially simultaneously, the intensities of four wavelengths. The wavelengths chosen were 3104, 3171, 3242 and 3317 A. Slit widths correspond to about ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240035a0
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrastructural, Morphometric, and Functional Characterization of Interstitial Cells from Mouse Testes Fractionated on Percoll Density Gradients (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 438 (1984), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1984.tb38359.x
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  • 4
    Electronic Resource
    Electronic Resource
    Nitrogen Dioxide Concentrations in the Atmosphere (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 129-133 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nitrogen dioxide and its related compounds react strongly with ozone, usually resulting in the destruction of the ozone, and life seems to be delicately adjusted to the radiation shield which the stratospheric ozone provides. We have found that atmospheric NO2 occurs in two layers, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246129a0
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  • 5
    Electronic Resource
    Electronic Resource
    Total ozone measurements in cloudy weather (1973)
    Springer
    Pure and applied geophysics 106-108 (1973), S. 928-937 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Obtaining an accurate, value for total ozone under a cloudy sky, especially when the sun is not high, is a major remaining problem associated with total ozone measurements. The Toronto spectrophotometer has been designed with this in mind. It has been fitted with a polarizing prism, and measures light at four wavelengths simultaneous which makes it possible to obtain two independent double ratios. Clouds produce two effects on ozone measurements; the first is purely an optical effect which causes an apparent increase in ozone, the second is most likely a real increase in ozone associated with large cumulus-type clouds. By considering the three following points it is possible to distinguish between these two cloud effects and probably measure the true total ozone for solar zenith angles less than 80°: 1. The multiply scattered component of polarized light is used to reduce optical cloud variance. This makes all skies appear like thick coulds. 2. A double difference similar to the AD method is used but the two ratios of the double difference are weighted inversely with
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881043
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  • 6
    Electronic Resource
    Electronic Resource
    Short-time period fluctuations in the total ozone (1973)
    Springer
    Pure and applied geophysics 106-108 (1973), S. 977-980 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The Toronto spectrophotometer was used to take an extensive series of ozone measurements for the period September 1971 to April 1972. As a result of these measurements it was found that short-lived variations of ozone occur which sometimes amount to more than 0.1 cm. These ‘ozone disturbances’ are advected because the same disturbance has been observed on the direct sun and the zenith sky at different times. Results which show the general nature of these disturbances will be presented. Also, a discussion will be given which stresses the need for an automated, mesoscale ozone-measuring network, capable of measuring in all weather conditions during all daytime hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881050
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  • 7
    Electronic Resource
    Electronic Resource
    The regenerative capacity of testicular interstitial tissue (1987)
    Springer
    Development genes and evolution 196 (1987), S. 467-471 
    Details
    ISSN: 1432-041X
    Keywords: Leydig cells ; Ethane dimethanesulphonate ; Destruction ; Regenerative capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A single intraperitoneal injection of ethane dimethanesulphonate (EDS) destroys all Leydig cells in the adult rat testis but 1–2 weeks later new foetal-type Leydig cells begin to regenerate within the interstitial tissue. A further EDS treatment at 4 weeks failed to kill the new population of foetal-type Leydig cells. Between 10–20 weeks, the new Leydig cells exhibited the characteristics of adult-type Leydig cells. These cells responded to another EDS treatment by exhibiting a second phase of complete degeneration followed by regeneration of a foetal-type and subsequently an adult-type cell population. The results indicate that the testis retains the ability to replenish its supply of Leydig cells despite successive phases of total degradation of Leydig cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00399148
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  • 8
    Electronic Resource
    Electronic Resource
    Antifertility activity of trimethylphosphate in male rats (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 999-1001 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The toxic effect of trimethylphosphate on rat testes was investigated after oral dosing with 250 mg/kg for either 5 days/week for 30 days or 6 days/week for 60 days. After these prolonged treatments azoospermia resulted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01971802
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  • 9
    Electronic Resource
    Electronic Resource
    Stimulatory effect of follicle-stimulating hormone on rat Leydig cells (1985)
    Springer
    Cell & tissue research 239 (1985), S. 405-415 
    Details
    ISSN: 1432-0878
    Keywords: Testis ; Leydig cell ; FSH ; Morphometry ; Ultrastructure ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The effects of FSH on the testicular interstitial tissue of immature hypophysectomized rats were studied by comparing morphological changes in Leydig cells with quantitative changes in interstitial tissue histology using morphometric analysis. Three groups of rats received subcutaneous injections of 0.5 ml saline vehicle or 10 μg rFSH or 20 ng oLH (equivalent to the amount of LH known to contaminate the FSH), twice daily for 7 days. Administration of FSH significantly increased testis weight and stimulated more advanced spermatogenesis compared to saline or LH. Morphometric analysis of testes of LH-treated rats showed a small but significant increase in total interstitial cell volume compared to saline treatment. FSH caused much greater increases in the total volume of interstitial tissue and interstitial cells than either saline or LH and significantly increased the total volume of interstitial fluid by comparison with the other groups. FSH but not saline or LH treatment resulted in a striking hypertrophy of Leydig cells, to produce cells ultrastructurally identical to Leydig cells from adults. Since the target tissue of FSH is the seminiferous epithelium, the observed effects on Leydig cells by FSH treatment suggest that the secretion of factors by the seminiferous tubules may mediate the maturation of Leydig cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218021
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  • 10
    Electronic Resource
    Electronic Resource
    Morphometric studies on lipid inclusions in Sertoli cells during the spermatogenic cycle in the rat (1984)
    Springer
    Cell & tissue research 236 (1984), S. 699-709 
    Details
    ISSN: 1432-0878
    Keywords: Testis ; Spermatogenic cycle ; Sertoli cell ; Lipid ; Morphometry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The volume and surface area of lipid inclusions often present in the cytoplasm of rat Sertoli cells was measured directly from semi-thin sections of perfusion-fixed testicular tissues using an image analyser linked to a light microscope. Sertoli cell nuclei were used as a reference for comparing any variations in the measured parameters of lipid inclusions during the rat spermatogenic cycle. Volume density of Sertoli cell lipid inclusions was assessed by morphometric analysis of Sertoli cells photographically reconstructed from electron micrographs. Maximum lipid content in Sertoli cells occurred during stages IX–XIV of the spermatogenic cycle, then declined at stages I–III and remained low from stages IV–VIII. The persistence and increase in number of many large Sertoli cell lipid inclusions beyond the stage where spermatid residual bodies are phagocytosed within the Sertoli cells (stage IX) suggests that the synthesis and lipolysis of Sertoli cell lipid inclusions represents an intrinsic functional cycle of the Sertoli cells. Stage-dependent variations in the lipid content of rat Sertoli cells offers morphological evidence that the metabolic duties of the Sertoli cells are synchronised with the spermatogenic cycle to provide local coordination of the proliferation and maturation of the germ cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217241
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