Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Pol J Vet Sci ; 19(4): 763-770, 2016 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-28092614

RESUMO

Grass carp reovirus (GCRV) is the causative agent of hemorrhagic disease in infected grass carp. During an outbreak, a mortality rate of up to 85% can be experienced, thus leading to substantial economic losses. The current understanding of disease pathogenesis is limited, with the distribution and dynamics of replication amongst different GCRV strains in vivo largely unknown. We determined distribution of different GCRV strains in infected grass carp, especially in some neglected tissues, such as the gill, brain, blood and so on. The results showed elevated viral RNA copy numbers in the blood, with some tissues such as the kidney, heart, brain, and bladder exhibiting even higher viral loads following infection with the virulent GCRV-CL strain. Even more interesting is that the brain exhibited the highest viral load, with a copy number of 800,000 following GCRV-CL infection. Overall, this study provides further insight into GCRV viral load distributions following infection and potentially identified some new viral tropism sites to provide a foundation for further studies aimed at characterizing GCRV viral pathogenesis.


Assuntos
Carpas , Doenças dos Peixes/virologia , Infecções por Reoviridae/veterinária , Reoviridae/fisiologia , Animais , Encéfalo/virologia , Regulação Viral da Expressão Gênica/fisiologia , RNA Viral/genética , RNA Viral/metabolismo , Infecções por Reoviridae/sangue , Infecções por Reoviridae/virologia , Fatores de Tempo , Bexiga Urinária/virologia , Carga Viral
2.
Chemosphere ; 72(3): 414-21, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18423518

RESUMO

Mesoporous nanocrystalline N-doped SiO2/TiO2 visible-light photocatalysts were prepared by treating SiO2/TiO2 xerogels in a flow of nitrogen gas bubbled through concentrated ammonia solution. Structural characterization and performance analysis results revealed that the addition of SiO2 remarkably altered the phase composition, specific surface area, microstructure, as well as the photocatalytic activity of N-doped TiO2. The presence of SiO2 in N-doped TiO2 particles suppressed the formation of rutile phase and the crystal growth of N-doped TiO2 particles during thermal calcinations. When weight ratio of SiO2/TiO2 was in 0.05-0.20, the N-doped SiO2/TiO2 exhibited higher photocatalytic activity than the N-doped TiO2, and optimum ratio was found to be 0.05. The enhanced photocatalytic activity could be attributed to the higher specific area, larger pore volume, and more surface hydroxyl groups in the catalyst.


Assuntos
Luz , Nanopartículas/química , Nitrogênio/química , Dióxido de Silício/química , Titânio/química , Catálise/efeitos da radiação , Microscopia Eletrônica de Transmissão , Nanopartículas/ultraestrutura , Fotoquímica
3.
Artigo em Chinês | MEDLINE | ID: mdl-1356655

RESUMO

Armigeres subalbatus (A.s.) was reported in Shandong Province for the first time in 1965 and found in five counties of south Shandong including Pingyi, Linyi etc. in 1986. In Dawa area of the Mengshan mountain A.s. alults could be found in the first ten days of May, which increased in number in July, and become the dominant species in mosquito colonies in Aug. and Sept., then decreased gradually in number in Oct. and disappeared in Nov. There were two peaks of activity and blood-sucking behavior during the 24 hours of a day, one at dusk and the other at dawn. When the temperature dropped to 16 degrees C and below in the last ten days of Oct., the wigglers began their diapause period. The survival ratio reached 90.5% after 12 h freezing at -5 degrees C and none survived after 60 hours freezing. When the temperature rose to 17 degrees C and above the over-winterting larvae developed into adults, which could suck blood only at the temperature above 17.5 degrees C.


Assuntos
Culicidae/fisiologia , Animais , China , Ecologia , Feminino , Masculino
4.
Zhongguo Yi Liao Qi Xie Za Zhi ; 24(1): 29-32, 2000 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-12583110

RESUMO

The complex field cure instrument is a new medical instrument. The complex field is composed of several sorts of physical quantum fields. Mice and rats are continuously irradiated by the complex field for 20 days to 90 days. The result shows that WBC, Hb and PLT value of the animals irradiated with the instrument are more than the control group, and their biochemical index is normal. The internal organs of the experimental animals show no toxicity. The visceval coefficient (liver, spleen) of the experimental animals is more than the control group. The marrow micronucleas test is negative. The chromosome test show no distortion. All of the results have proved that the instrument produces no toxicity side effect. Application of the instrument is safe and reliable and it may increase immune function of the body.


Assuntos
Neoplasias/terapia , Modalidades de Fisioterapia/instrumentação , Animais , Análise Química do Sangue , Peso Corporal/efeitos da radiação , Segurança de Equipamentos , Feminino , Masculino , Camundongos , Camundongos Endogâmicos , Modalidades de Fisioterapia/métodos , Ratos , Ratos Sprague-Dawley
5.
Int J Data Min Bioinform ; 2(1): 78-93, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18399329

RESUMO

RNA plays a critical role in mediating every step of cellular information transfer from genes to functional proteins. Pseudoknots are functionally important and widely occurring structural motifs found in all types of RNA. Therefore predicting their structures is an important problem. In this paper, we present a new RNA pseudoknot structure prediction method based on term rewriting. The method is implemented using the Mfold RNA/DNA folding package and the term rewriting language Maude. In our method, RNA structures are treated as terms and rules are discovered for predicting pseudoknots. Our method was tested on 211 pseudoknots in PseudoBase and achieves an average accuracy of 74.085% compared to the experimentally determined structure. In fact, most pseudoknots discovered by our method achieve an accuracy of above 90%. These results indicate that term rewriting has a broad potential in RNA applications ranging from prediction of pseudoknots to discovery of higher level RNA structures involving complex RNA tertiary interactions.


Assuntos
Algoritmos , Modelos Químicos , Modelos Moleculares , RNA/química , RNA/ultraestrutura , Análise de Sequência de RNA/métodos , Sequência de Bases , Simulação por Computador , Dados de Sequência Molecular , Conformação de Ácido Nucleico
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA