ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    POSTNATAL INCREASES IN RAT TESTIS GLUTATHIONE: CORRELATION WITH CHANGES IN GERM CELL COMPOSITION (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 383 (1982), 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.1749-6632.1982.tb23184.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effects of selenium deficiency on the shape and arrangement of rodent sperm mitochondria (1983)
    New York, NY : Wiley-Blackwell
    Gamete Research 7 (1983), S. 389-399 
    Details
    ISSN: 0148-7280
    Keywords: selenium deficiency ; sperm mitochondria ; mice ; rats ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Selenium-deficient male mice were obtained by feeding a selenium-deficient diet for three successive generations to Swiss-Webster mice. Examination of epididymal sperm by transmission electron microscopy revealed progressively increasing alterations in the shape and arrangement of mitochondria within the midpiece. Other midpiece anomalies included acute bends, disorientation of the axoneme and dense fibers, and cytoplasmic masses at atypical locations. Some cross sections showed both the principal piece and midpiece within the same plasma membrane. Negatively stained whole mounts of mitochondrial ghosts prepared from epididymal sperm of normal and first-generation selenium-deficient mice and rats indicated that the selenium-deficient ghosts were smaller, less curved, and more fragile than those of normal sperm mitochondria. Thus, selenium appears to be required for the normal development or stabilization of mitochondria1 shape during spermiogenesis in these rodents.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1120070410
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Normal levels of zinc and sulfhydryls in morphologically abnormal populations of spermatozoa from moderately zinc-deficient rats (1984)
    New York, NY : Wiley-Blackwell
    Gamete Research 9 (1984), S. 375-386 
    Details
    ISSN: 0148-7280
    Keywords: rat ; zinc-deficient ; sperm ; dense fibers ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Zinc is required for spermatogenesis in mammals and is concentrated in the dense outer fibers of the sperm tail, where it is associated with cysteine-rich protein. To investigate the effects of marginal zinc deficiency upon dense fiber formation and upon sperm quality in general, weanling Sprague-Dawley rats were administered a commercial low-zinc diet, supplemented with phytate, for approximately 60 days, and were compared with controls fed the same diet plus 50 ppm zinc in their drinking water. The following characteristics of the zinc-deficient rats were significantly lower than in the controls: body weight, testis weight, epididymis weight, seminal vesicle weight, sperm content of the cauda epididy-midis, sperm motility, testis zinc, and hair zinc. By contrast, the levels of sperm zinc and sperm sulfhydryls were the same in the zinc-deficient and control rats. The zinc-deficient rats displayed a highly variable spectrum of sperm defects, which included decapitation, disorganized and redundant tail elements, and superfluous cytoplasm. However, abortive dense fiber development was only rarely observed. Apparently, even when availability of zinc is limited and reduced sperm production ensues, elaboration of dense fibers rich in zinc and sulfhydryls continues to be obligatory for the completion of spermiogenesis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1120090403
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Progressive defects observed in mouse sperm during the course of three generations of selenium deficiency (1983)
    New York, NY : Wiley-Blackwell
    Gamete Research 7 (1983), S. 377-387 
    Details
    ISSN: 0148-7280
    Keywords: selenium deficiency ; mouse sperm ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Three successive generations of mice were fed a Torula yeast based Se-deficient diet with or without 0.1 ppm Se in the drinking water. The Se-deficient mice, in the course of three generations, showed a decrease in body weight, testis weight, epididymal weight, and sperm production. The percentage of morphologically abnormal sperm increased in successive generations. The majority of sperm defects were found in the midpiece region of the tail. Many of these aberrant sperm were motile. A progressive decrease in fertility was noted during the first two generations of Se deficiency. This system confirms the essential role of Se in spermatogenesis and provides a model for the evaluation of the primary effect of Se deprivation on the structural development of sperm.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1120070409
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Evidence that selenium in rat sperm is associated with a cysteine-rich structural protein of the mitochondrial capsules (1981)
    New York, NY : Wiley-Blackwell
    Gamete Research 4 (1981), S. 139-149 
    Details
    ISSN: 0148-7280
    Keywords: selenium ; rat sperm ; mitochondrial capsules ; cysteine ; protein ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The keratinous capsules surrounding rat sperm mitochondria were isolated 24 days after intratesticular injections of [75Se] selenite or [35S] cysteine. Dodecyl sulfate-polyacrylamide gel electrophoresis of purified, doubly labeled mitochondrial capsules revealed only a single 75Se-labeled component, whose molecular weight was 17,000, in agreement with previously reported observations obtained with cruder sperm fractions. Most of the 35S label and the major zone of stained protein on the gels coincided with the position of 75Se, suggesting that selenium is associated with a cysteine-rich structural protein. The level of selenium in rat sperm, 195 ± 3.2 ng/108 sperm (approximately 30 ppm), determined by hydride generation and atomic absorption spectrophotometry, is consistent with a structural function for this trace element in the sperm.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1120040208
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...