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Influence de la nature et de l'abondance des proies sur l'augmentation des effectifs de deux coccinelles prédatrices de la cochenille du manioc au Congo

✍ Scribed by Kiyindou, A. ;Rü, B. ;Fabres, G.


Publisher
Springer-Verlag
Year
1990
Tongue
English
Weight
544 KB
Volume
35
Category
Article
ISSN
1573-8248

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The signs of the phosphorus-proton coupling constants in various allenic organophosphorus compounds have been determined by either analysis of the AB2X spectra or double resonance. Probable absolute signs have been obtained by taking sJ(P-H) as positive. In allenic phosphine oxides, the following s