991 resultados para Kirk, Bernard
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v.5:SO-Z (1915)
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v.6:suppl.A - I (1922)
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v.4:P-SN (1913)
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A fase larval do predador Nusalala uruguaya (Navás, 1923) alimentada com pulgão-preto-dos-citros Toxoptera citricidus (Kirk), pulgão-da-couve Brevicoryne brassicae (L.) e pulgão-do-picao Dactynotus sp. foi estudada, em condições de laboratório à 25 ± 2°C, UR de 70±10% e fotofase de 14 horas. A espécie de presa consumida afetou a fase larval do predador, influenciando a duração e a viabilidade de cada instar, a largura da cápsula cefálica, o peso e o tamanho de suas larvas. Dactynotus sp. foi a espécie mais consumida e que propiciou o melhor desenvolvimento larval, sendo que T. citricidus acarretou 100% de mortalidade no primeiro instar. As larvas de N. uruguaya somente se alimentaram de pre-ovos e larvas da sua própria espécie.
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v.39:no.3(1956)
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v.42:no.5(1958)
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v.63(1972)
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v.59:no.2(1971)
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n.s. no.29(1997)
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no.3 (1978)
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no.5 (1979)
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In this paper the author points out to a old question of about 200 years ago in wich two kinds of opinions were discussed. BANCROFT and FONTANA in one hand atributes for the Indian arrow poison (curare) the propriety of uncoagulate the blood, and C. BEBNAHDJ, B. RODRIGUES and others made an contradictory opinion upon this subject. In our experiments, we utilized 4 curares samples from indians who lives near the Brazilian border at Colombia, the famous Ticunas poison, and the alkaloid d-Tubocurarine. These poisons were added in form of emulsion in saline to the blood and blood plasma in order to perform two kinds of experiments. In one serie of experiments we observed the effect of curare on human blood coagulation time according to LEE-WHITE technic puting 0.5 ml of the various poisons emulsions previously into the tube. By this method, we have found that the emulsion containing 0.1 g of the poison in 10 ml saline was the most effective (Table II), therefore we used this curare emulsion concentration in the other serie of experiments, in which we tested the action of these venoms on the human blood plasma prothrombins time, (Quick Technic) adding 0.1 ml of the saline poison emulsion to each 0.1 ml of human blood plasma. Results from these experiments can be seen on Table II. These experiments we have tried on one sample of human blood plasma plus the differents curares samples; and in another opportunity four samples of human blood plasma were tried with the curare from Ticunas indians (the most effective in this respect). Results from these experiments may be seen on Table III. All the poison tried in our experiments was previously tested on toads legs (B. crucifer) to verify his curares action. All times obtained with the experiments above, show highly significant results (P<001) when compared with the blood and blood plasma mixed with in the same volume of saline. Our results, point out that BANCROFT and FONTANA views upon the effect of curare on blood clothing time were correct. Curares enhance the blood clothing time "in vitro". But, in other hand, the work in that matter by NESI (6), and TISTHOUND (7) showing that d-Tubocurarine had no significant effect on blood clothing time of man and dogs "in vivo", made possible to conclude that the observations of C. BERNARD, B. RODRIGUES and others were also true. These discordance of opinions, we believe, may result as BANCROFT and FONTANA researches, were wade "in vitro" whereas C. Bernard, B. Rodrigues and others performed their experiments "in vivo".
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During recent studies of the parasites of birds from the Amazonian Regio, the following nematodes were recovered: Hoazinstrongylus amazonensis n.gen.n.sp. from Opisthocomus hoazin (Muller, 1776); Ascaridia columbae (Gmel., 1790) Travassos, 1913, from Leptotila r. rufaxilla (Richard & Bernard, 1712) representing a new host record; Inglisakis ibanezi Freitas, Vicente & Santos, 1969, Cyrnea (C.) semilunaris (Molin, 1860) Seurat, 1914 and Thelazia digitata Travassos, 1918. A compelte description is restrained to the new genus and new species here proposed. The other known and well described species are listed and accounted.
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OBJECTIVE: To examine the relation between depression and substance use in adolescents and the concomitant courses of both disorders. METHODS: Four individual interviews were administered to 85 adolescent substance users aged 14-19 years (mean 17.1 years, SD 1.4) over a 3.5 year period using the Adolescent Drug Abuse Interview (ADAD) and the Beck Depression Inventory (BDI-13). RESULTS: No predictive effect was observed on one dimension over the other, but each dimension was predictive of its own course. A decrease in substance-use severity paralleled a decrease in depressive state. Similarly, stable substance-use rates, either at a low or a high level, tended to be associated with low or high levels of depression, respectively. However, an increase in substance use was not accompanied by an increase in depressive states. Moreover, depression varied greatly between adolescents, and according to gender and age. CONCLUSIONS: Depressive states and substance use in adolescents can vary considerably overtime, and are closely but rather synchronically related. Since most of the adolescents do not seek help for substance-related problems, substance use should be systematically assessed in adolescents presenting with a depressive state.