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283.377  Articles
1 of 28.339 pages  |  10  records  |  more records»
Coal mining and coal preparation dumps are on the one hand as environmentally hazardous, on the other hand – commercial significance, in terms of content of rare metals raw materials. Biotechnological methods are most justified for its processing to recov... see more

Coal mining and coal preparation dumps are on the one hand as environmentally hazardous, on the other hand – commercial significance, in terms of content of rare metals raw materials. Biotechnological methods are most justified for its processing to recov... see more

The waste, which is generated in the process of mining, processing and burning of coal, forms man-made ecosystems in  long-term storage, representing a threat to the environment, and of considerable interest in terms of processing and extraction of r... see more

The waste, which is generated in the process of mining, processing and burning of coal, forms man-made ecosystems in  long-term storage, representing a threat to the environment, and of considerable interest in terms of processing and extraction of r... see more

Moso bamboo is one of the fastest-growing plants in the world. The objective of this study was to investigate the impact of converting secondary broadleaf evergreen forests (CK) to Moso bamboo plantations, and the impact of different management strategies... see more

This study examined dog and cat demographics, roaming behaviours, and interspecific interactions in a remote Aboriginal island community using multiple methods. Our results revealed temporal differences between the roaming behaviours of dogs, cats, and wi... see more

Dynamics of bacterial community abundance and structure of a newly established horizontal subsurface flow (HSSF) pilot-scale wetland were studied using high-throughput sequencing and quantitative polymerase chain reaction (PCR) methods. Bacterial communit... see more

Oil palm plantations are the most invasive land use changes in Southeast Asia. It must have affected unique natural biodiversity. This study aimed to investigate the diversity of soil bacteria based on 16S rRNA gene profiles from tropical forest and oil p... see more

Inmunopatología de la influenza A H1N1 / Immunology of the Influenza A H1N1 infectionInmunopatología de la influenza A H1N1 / Immunology of the Influenza A H1N1 infectionSe realiza una actualización sobra la virología e inmunología en la infección por el virus  A H1N1.  La primera epidemia del siglo XXI fue declarada por la OMS el 9 de junio de 2009.  H1N1 es un nuevo virus de la influenza A con elevada contagiosidad lo que ha influido en la velocidad de propagación de la infección entre los diferentes países y ha propiciado una alta morbimortalidad.  La característica de su genoma (ARN), al estar constituido por 8 fragmentos, interviene en la replicación viral defectuosa y en el proceso de flujo y cambio antigénico, con rearreglo genético que causa la aparición de nuevas cepas del virus.  La inducción ineficiente de interferón por la célula hospedera, el débil papel de los anticuerpos neutralizantes en la primoinfección, y la liberación de citoquinas proinflamatorias, sumado a las sobreinfecciones bacterianas condicionan la alta morbilidad y mortalidad que se incrementa en determinadas condiciones de comorbilidad de los individuos infectados.  Los cambios que ocurren en los antígenos virales impiden el reconocimiento por el sistema inmune., y ahí radica la dificultad para la preparación definitiva de una vacuna.  Entender la inmunopatología de la infección, así como divulgar esta información a la comunidad científica, constituye el paso inicial para la toma de decisiones a favor de evitar la propagación de la infección.Palabras clave. Gripe humana/prevención & y control, Virus de la Influenza A/inmunología/patogenicidad, MUTACIÓN/genética ABSTRACTAn update about the virology and immunology of the Influenza A H1N1 infection is made.  The first epidemic of the XXIth century was addresses by WHO on June 9th, 2009.  H1N1 is a new virus of the Influenza A, showing increased infection, thereby influencing on the spreading speed of the infection among different countries leading to high morbidity and mortality.  The viral genome (RNA), being formed of 8 fragments, works for a defective viral replication and on the process of antigenic flux and change, having a genetic rearrangement causing the appearance of new viral strains.  The inefficient induction of interferon, the weak role of neutralizing antibodies in the prime-infection, and the release of pro-inflammatory cytokines, added to the bacterial superimposed infections will condition the high morbidity and mortality that are increased in certain comorbid conditions of the infected individuals.  Changes occurring on viral antigens avoid the reconnaissance of the virus by the immune system, then the difficulty to make a proper vaccine.   Understanding the immunopathology of this infection, so as the divulgation of this information to the scientific community, are the initial steps for the taking of decisions to favor the avoiding of the infection spreading.Key words: Human influenza/prevention & control, Influenza A virus/inmunology/pathogenicity, MUTATION/genetics.

ABSTRACTAn update about the virology and immunology of the Influenza A H1N1 infection is made.  The first epidemic of the XXIth century was addresses by WHO on June 9th, 2009.  H1N1 is a new virus of the Influenza A, showing increased infection,... see more

1 of 28.339 pages  |  10  records  |  more records»