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  • 1
    Electronic Resource
    Electronic Resource
    Antifertility factors of mammalian seminal fluid (1987)
    New York, NY : Wiley-Blackwell
    BioEssays 7 (1987), S. 13-17 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The fertilizing ability of spermatozoa is inhibited by certain substances present in the seminal fluid. Most of these antifertility factors are proteinaceous in nature and differ in their physical characteristics. They inhibit fertilization by inhibiting either motility, capacitation, acrosome reaction or penetration of the ovum investments by the spermatozoa. This review describes and discusses the properties of these factors and their possible role, individually and collectively, in the regulation of fertility.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950070104
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    Paper (German National Licenses)
    Fulltext
  • 2
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    A near-infrared study of the NGC 6334-IV region (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: High-angular-resolution, high-sensitivity maps at 1.2, 1.65, and 2.2 microns have been made of the NGC 6334-IV region. These maps show that the diffuse, bipolar 2-micron emission associated with a bipolar source in the region is probably excited by two sources between the lobes. The first is a highly obscured protostar with a luminosity of about 100,000 solar luminosities. The second possible source of excitation is the scattered free-free and bound-free emission from an H II region surrounding a second young star. The extinction to both these objects must be much higher along the line of sight from earth to them than from them to the bipolar lobes. This is consistent with an earlier interpretation of FIR observations (Harvey and Gatley, 1983) which suggested the presence of an edge-on dust disk around the two central luminosity sources. A rich cluster of lower luminosity IR sources has also been found associated with the two most luminous objects.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 317; 173-179
    Format: text
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    NASA TECHNICAL REPORTS
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