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4.
Cytobios ; 106 Suppl 2: 151-64, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11545443

RESUMO

The oral administration of a soxhlated crude ethanolic extract of leaves of neem (Azadirachta indica Ajuss; family Meliaceae) to adult male mice for 6 weeks (one spermatogenic duration) at the rate of 0.5, 1.0 or 2.0 g/kg body weight per day increased the incidences of structural changes and synaptic-disturbances in meiotic chromosomes and also caused more disruptions of meiosis. The extract reduced the sperm count and increased the frequency of spermatozoa with abnormal head morphology. It is suggested that at least one of the constituents of the extract may have interfered with the DNA. The result was chromosome strand breakages, or spindle disturbances, and the regulation of genes responsible for sperm shaping was affected.


Assuntos
Esterilizantes Químicos/efeitos adversos , Células Germinativas/efeitos dos fármacos , Glicerídeos/efeitos adversos , Terpenos/efeitos adversos , Animais , Tamanho Celular/efeitos dos fármacos , Esterilizantes Químicos/administração & dosagem , Quebra Cromossômica , Anticoncepcionais Femininos/administração & dosagem , Anticoncepcionais Femininos/efeitos adversos , Relação Dose-Resposta a Droga , Células Germinativas/patologia , Glicerídeos/administração & dosagem , Masculino , Meiose/efeitos dos fármacos , Camundongos , Testes de Mutagenicidade , Extratos Vegetais/efeitos adversos , Folhas de Planta/química , Contagem de Espermatozoides , Terpenos/administração & dosagem
5.
Buenos Aires; ATE; nov. 1995. 35 p. graf.(Instituto de Estudios sobre Estado y Participación). (57743).
Monografia em Espanhol | BINACIS | ID: bin-57743
6.
Buenos Aires; ATE; nov. 1995. 35 p. graf.(Instituto de Estudios sobre Estado y Participación).
Monografia em Espanhol | BINACIS | ID: biblio-1186502
7.
Environ Health Perspect ; 14: 103-7, 1976 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-789057

RESUMO

Chemosterilants, i.e., chemical compounds that interfere with the reproduction potential of sexually reproducing organisms, can be used in three new approaches to insect control. In the sterile-insect release technique, the principal problem is to develop compounds and methods for their application that would not result in introducing harmful residues into the environment. Because of the unusual and often unique circumstances connected with releasing large numbers of sterilized insects, the residue problem and its cost-benefit aspects must be examined individually for each intended control or eradication program. In the direct application technique, chemosterilants must meet the same efficiency and safety standards required from approved insecticides. Combined insecticidal and sterilizing activity is characteristic for some compounds now being investigated. In the genetic technique, chemosterilants may be used for inducing heritable changes in the insect's genome under laboratory conditions, and such procedures would not present any residue problems. Only the first two chemosterilant techniques are approaching practical application, and their safety aspects require detailed evaluation and assessment.


Assuntos
Esterilizantes Químicos , Controle de Insetos , Esterilizantes Químicos/efeitos adversos , Dípteros , Genética , Insetos , Esterilização Reprodutiva
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