Controle biológico da podridão radicular (Pythium aphanidermatum) e promoção de crescimento por Pseudomonas chlororaphis 63-28 e Bacillus subtilis GB03 em alface hidropônica

Podridões radiculares causadas por espécies de Pythium são um importante problema em cultivos hidropônicos. Sintomas de subdesenvolvimento são observados nas plantas parasitadas pelo patógeno, sendo muitas vezes não diagnosticados pelo produtor. O objetivo do trabalho foi avaliar o controle biológico da podridão radicular causada por Pythium aphanidermatum e a promoção de crescimento por Pseudomonas chlororaphis 63-28 e Bacillus subtilis GB03, reconhecidos agentes de controle biológico de doenças de plantas. A inoculação das plantas com P. aphanidermatum ocasionou o subdesenvolvimento, sendo essa diminuição de 20%. A adição dos agentes de biocontrole na solução nutritiva teve um efeito positivo no aumento da massa (6% a 13%), no número de folhas (4% a 7%) e no teor de clorofila (3%) das plantas de alface. Entretanto, maiores estudos devem ser realizados para melhorar a capacidade de controle da doença e de promoção de crescimento pelos agentes de biocontrole estudados no cultivo de alface hidropônica.

Desempenho produtivo de vacas de quatro grupos genéticos submetidas a diferentes manejos alimentares desmamadas aos 42 ou 63 dias pós-parto

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desempenho de bezerros de corte filhos de vacas submetidas a diferentes manejos alimentares, desmamados aos 42 ou 63 dias de idade

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Urinary bladder washings in autopsies. A cytopathologic study of 63 cases

The sediment from urinary bladder washings from 63 consecutive autopsies was cytologically studied in order to achieve a better understanding of the changes in urothelial cells collected from hospital populations. The observed alterations were correlated with alterations in the urinary system and with therapy preceding death. The specimens obtained were of good quality. In 39.7% of the cases, the sediment contained giant superficial multinucleated cells. Three of nine cases previously subjected to radiation or chemotherapy showed atypical urothelial cells. In three cases with immunosuppression, there was cytologic evidence of subclinical infection by polyomavirus, and virus particles were identified by electron microscopy of the vesical mucosa. The study of the smear background offered additional information: the sediment contained hyaline or hematic or hyaline-cellular casts in 17.4% of the cases, in all of which there were renal tubulopathies when the kidney sections were studied. The method is useful for a good evaluation of the autopsy as well as for training in urinary cytopathology.

La política económica de Chile en el decenio 1954-63

Documento en inglés ingresado en Biblioteca (88753)

Economic policy in Chile, 1954-63

Includes bibliography

La mortalidad en la República de Cuba, 1943-53 y 1961-63

Incluye Bibliografía

Effect of plasma and/or yeast extract on performance and intestinal morphology of piglets from 7 to 63 days of age

The objective of this study was to evaluate the effect of diets supplemented with plasma and/or yeast extract on performance (daily weight gain [DWG], daily feed intake [DFI] and feed conversion [FC]) and intestinal morphology of piglets from 7 to 63 days of age. A total of 288 piglets aged 7 days and weighing 2.57±0.05 kg were studied. A randomized block design consisting of four experimental diets, six repetitions and 12 piglets per experimental unit was adopted. The pre-starter I (7 to 21 days), pre-starter II (22 to 35 days) and starter I (36 to 49 days) diets were supplemented as follows: control diet (CD): no plasma or yeast extract; plasma (PL) diet: addition of 6%, 4% and 2% plasma; yeast extract (YE) diet: addition of 6%, 4% and 2% yeast extract; plasma + yeast extract (PL+YE) diet: addition of 3%, 2% and 1% plasma and yeast extract each. From 50 to 63 days of age all piglets received the same diet. No difference in performance was observed from 7 to 21 days and from 7 to 28 days of age, whereas DWG was higher from 7 to 35 days in piglets receiving the PL+YE diet (268, 278, 271 and 288 g/day for CD, PL, YE and PL+YE, respectively). From 7 to 49 days and from 7 to 63 days, DWG (330 and 519 g/day, respectively) and DFI (307 and 647 g/day) were higher in animals receiving the PL-YE diet when compared with those consuming CD (DWG: 295 and 486 g/day; DFI: 266 and 594 g/day). No significant differences in intestinal morphology were observed between piglets receiving the different diets. The combination of plasma and yeast extract elevates DWG, but does not affect the intestinal morphology of piglets from 7 to 63 days of age. © 2013 Sociedade Brasileira de Zootecnia.