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1988 (1)
1984 (1)
1Author    Denise Feder, Denise Valle, H. Rembold, E. S. GarciaRequires cookie*
 Title    Azadirachtin-Induced Sterilization in Mature Females of Rhodnius prolixus  
 Abstract    The effects of azadiraehtin A, given orally, on the reproduction of mature females of Rhodnius prolixus were studied. Azadiraehtin A caused a reduction in oocyte growth and consequently in the egg production in a dose-dependent manner. Eggs layed had no alteration in their viabilities. A significant correlation between these effects and the titers of both vitellogenin in the haemolymph and vitellin in the ovaries was observed. Ecdysteroid titers in haemolymph and ovaries, as determined by radioimmunoassay, were decreased by this treatment. In vitro analysis suggested that azadiraehtin may directly interfere in ovarian ecdysteroid production. The signifi-cance of these findings in relation to the mode of action of azadiraehtin is discussed. 
  Reference    Z. Naturforsch. 43c, 908—913 (1988); received May 16/September 12 1988 
  Published    1988 
  Keywords    Azadiraehtin, Reproduction, Sterilization, Rhodnius prolixus 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0908.pdf 
 Identifier    ZNC-1988-43c-0908 
 Volume    43 
2Author    U. Bührlen, H. Emmerich, H. RemboldRequires cookie*
 Title    Titer of Juvenile Hormone III in Drosophila hydei during Metamorphosis Determined by GC-MS-MIS  
 Abstract    The titer of juvenile hormone III (JH-III) has been determined by the use of combined gas chromatography-mass spectroscopy (GC-MS) in whole body extracts of the larvae, prepupae, pupae and adults of Drosophila hydei. A characteristic JH-III titer curve was established by use of the hormone derivatives. No other juvenile hormone homologs were detected. JH-III shows a broad peak maximum of about 30 pmol/g fresh weight during the last larval instar, whereas only traces of the hormone are detectable at pupariation. Prepupae and pupae exhibit about the same JH-III level. In older pupae and in the pharate adults there was no JH-III detectable but it reappeared soon after emergence. Low values of JH-III are found in young male and female flies. The JH contents rise to distinct peaks in older and reproductive adults, both in male and female animals. 
  Reference    Z. Naturforsch. 39c, 1150—1154 (1984); received June 29 1984 
  Published    1984 
  Keywords    Juvenile Hormone, Drosophila hydei, Metamorphosis, Reproduction, Gas Chromatography-Mass Spectroscopy 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-1150.pdf 
 Identifier    ZNC-1984-39c-1150 
 Volume    39