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A adubacao verde pode provocar modificacoes na populacao de plantas espontaneas devido aos efeitos alelopaticos e a competicao por luz, agua, oxigenio e nutrientes, acarretando supressao de algumas delas. Por outro lado, as leguminosas, pelas melhorias que promovem nas condicoes do solo, favorecem especies com maior capacidade de ciclagem de nutrientes e producao de biomassa. O objetivo deste trabalho foi avaliar as modificacoes na populacao de plantas espontaneas por leguminosas usadas como adubo verde. O experimento foi realizado em Sete Lagoas, MG, na Embrapa-Centro Nacional de Pesquisa de Milho e Sorgo. O solo local e um Latossolo Vermelho distrofico tipico, e a clima, do tipo Aw (tropical estacional de savana). O experimento consistiu de seis tratamentos, sendo cinco especies de leguminosas (feijao-de-porco, feijao-bravo-do-ceara, mucuna-preta, lab-lab e guandu), cultivadas na presenca de plantas espontaneas, e a testemunha (solo preparado e deixado em pousio com plantas espontaneas), e as leguminosas, cultivadas em dois anos agricolas. O feijao-bravo-do-ceara, seguido da mucuna-preta e do feijao-de-porco, foram as leguminosas com maiores produtividades de biomassa. A mucuna-preta demonstrou maior potencial para cobertura do solo e supressao de plantas espontaneas. O uso de leguminosas para adubacao verde promove modificacoes na dinamica de sucessao das especies espontaneas. Made available in DSpace on 2017-06-09T23:51:42Z (GMT). No. of bitstreams: 1 Modificacoespopulacoes.pdf: 341131 bytes, checksum: 1238c7a6f888f3c45c8c112b8b41507e (MD5) Previous issue date: 2001-12-06

Selective arterial embolization with Gelfoam was performed in 45 cases of hypernephroma. In 33 cases this technique has been utilized as preoperative procedure and almost always (97%) nephrectomy was facilitated: 97% of the cases had slight or moderate operative bleeding; in 82% of the cases separation of the tumor-containing kidney from adjacent tissues was easy. Embolization has been employed in 12 inoperable patients and was effective mainly in management of bleeding. Angiographic controls after embolization (from 13 to 162 days) were performed 8 times and it was assessed that the efficacy of the procedure on primary tumor growth is limited in time by renal artery revascularization. The embolized patients never presented severe complications, except several episodes of transitory renal failure.

The authors describe 2 cases of ileal carcinoid. They evaluate the advantages of selective angiography over the traditional radiologic methods, considering their cases and the 39 found in the literature. The angiographic signs of the lesions localized to the bowel wall are rather scarse and non-specific. The signs of mesenteric infiltration, which is precocious and conspicuous in this type of tumour, are more significant. Liver metastases, which are very frequent, are hypervascularized. The angiographic pattern may be similar to that found in some inflammatory diseases, but can be differentiated from that of other neoplasms of the small intestine.