منابع مشابه
مطالعه فونیستیکی قورباغه‌ها در ایران (Anura: Ranidae)
چکیده Rana، جنسی از خانوادهی رانیده (Ranidae) میباشد که دارای پراکندگی جهانی با 6 زیر خانواده، 30 جنس و 500 گونه است. قورباغههای ایران تا کنون به صورت کامل شناخته نشدهاند. نتایج مطالعه فون قورباغه در 343 محل مختلف در 20 استان ایران و نیز سایر مطالعاتی که توسط محققین دیگر صورت گرفته است، 2 جنس و 4 گونه را از این مناطق ثبت نموده است: Rana ridibunda, Rana Camerani, Rana macrocnemis, Euphlyc...
متن کاملAn efficient synthesis of imidazolinium salts using vinyl sulfonium salts.
The synthesis of imidazolinium salts from the reaction of formamidines and (2-bromoethyl)diphenylsulfonium triflate is described. A variety of symmetrical and unsymmetrical imidazolinium triflate salts were synthesized in high yield in short reaction times under mild conditions. Aromatic and aliphatic N-substituents work well. The reaction is proposed to proceed via generation of a vinyl sulfon...
متن کاملOvulation and Oviposition in Anura
THE results of hypophysectomy and of injection of extracts show that the gonads of Amphibia are under the control of the anterior lobe of the pituitary (Wolfe, 1929; Hogben, 1930). Xenopus laevis does not exhibit any sexual activity in the laboratory. When appropriate nutritive and other conditions are fulfilled (Landgrebe, 1939), the ovaries are close to the threshold of ovulation at all seaso...
متن کاملPharmaceutical salts.
Keyphrases D Pharmaceutical salts-general pharmacy, physicochemical properties, bioavailability, pharmaceutical properties, toxicology, review J:J Salts, pharmaceutical-general pharmacy, physicochemical properties, bioavailability, pharmaceutical properties, toxicology, review J:J Physicochemical properties-dissolution, solubility, stability, and organoleptic properties of pharmaceutical salts,...
متن کاملThe tadpoles of Hyla rufitela (Anura: Hylidae).
The validity of the published description of Hyla rufitela is questioned because the origin of the described tadpoles does not correspond to the distribution of this species. The present description, based on tadpoles that were hatched from two egg masses from the Caribbean lowland of Costa Rica, includes tadpoles raised to adult frogs to verify the species. The newly described tadpoles differ ...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1973
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.21.952