994 resultados para Atomic bomb


Relevância:

100.00% 100.00%

Publicador:

Resumo:

The Atomic Bomb Casualty Commission was established in Hiroshima in 1947 and in Nagasaki in 1948 under the auspices of the U.S. National Academy of Sciences to initiate a long-term and comprehensive epidemiological and genetic study of the atomic bomb survivors. It was replaced in 1975 by the Radiation Effects Research Foundation which is a nonprofit Japanese foundation binationally managed and supported with equal funding by the governments of Japan and the United States. Thanks to the cooperation of the survivors and the contributions of a multitude of scientists, these studies flourish to this day in what must be the most successful long-term research collaboration between the two countries. Although these studies are necessarily limited to the effects of acute, whole-body, mixed gamma-neutron radiation from the atom bombs, their comprehensiveness and duration make them the most definitive descriptions of the late effects of radiation in humans. For this reason, the entire world relies heavily on these data to set radiation standards. As vital as the study results are, they still represent primarily the effects of radiation on older survivors. Another decade or two should correct this deficiency and allow us to measure definitively the human risk of heritable mutation from radiation. We look to the worldwide radiation and risk community as well as to the survivors who have contributed so much to what has been done already to accomplish this goal.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

For 50 years, the Atomic Bomb Casualty Commission (ABCC) and its successor, the Radiation Effects Research Foundation (RERF), have conducted epidemiological and genetic studies of the survivors of the atomic bombs and of their children. This research program has provided the primary basis for radiation health standards. Both ABCC (1947–1975) and RERF (1975 to date) have been a joint enterprise of the United States (through the National Academy of Sciences) and of Japan. ABCC began in devastated, occupied Japan. Its mission had to be defined and refined. Early research revealed the urgent need for long term study. In 1946, a Directive of President Truman enjoined the National Research Council of the National Academy of Sciences to develop the program. By 1950, ABCC staff exceeded 1,000, and clinical and genetic studies were underway. Budgetary difficulties and other problems almost forced closure in 1953. In 1955, the Francis Report led to a unified epidemiological study. Much progress was made in the next decade, but changing times required founding of a binational nonprofit organization (RERF) with equal participation by Japan and the United States. New programs have been developed and existing ones have been extended in what is the longest continuing health survey ever undertaken.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

"Kyoto University."

Relevância:

100.00% 100.00%

Publicador:

Resumo:

"Special edition."

Relevância:

70.00% 70.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

70.00% 70.00%

Publicador:

Resumo:

Loose-leaf.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

O trabalho aborda o baile dos Horrores, que acontecia no período pré-carnavalesco do Clube Magnatas de Futebol de Salão localizado na Rua General Belford no bairro do Rocha, subúrbio do Rio de Janeiro, de 1960 a 1988. Sua característica marcante foi o horror levado às últimas conseqüências, chamando a atenção da imprensa e provocavam mal estar em pessoas mais sensíveis. A dissertação busca discutir os motivos da presença desses elementos numa festa onde a alegria predomina. Procuramos, desse modo, associar o baile a um período do século XX em que as tensões ocasionadas por uma série de fatores (como a Segunda Guerra Mundial, a Guerra Fria e a Guerra do Vietnã, por exemplo) causavam os mais diversos temores com elementos nunca antes visto, como a bomba atômica, iniciando assim novo período onde as metamorfoses seguiam o caminho do terror. A ciência, por sua vez, aceleraria processos que teriam influencia em todos os campos da produção humana, inclusive, ou principalmente, nas artes

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Current understanding of risk associated with low-dose radiation exposure has for many years been embedded in the linear-no-threshold (LNT) approach, based on simple extrapolation from the Japanese atomic bomb survivors. Radiation biology research has supported the LNT approach although much of this has been limited to relatively high-dose studies. Recently, with new advances for studying effects of low-dose exposure in experimental models and advances in molecular and cellular biology, a range of new effects of biological responses to radiation has been observed. These include genomic instability, adaptive responses and bystander effects. Most have one feature in common in that they are observed at low doses and suggest significant non-linear responses. These new observations pose a significant challenge to our understanding of low-dose exposure and require further study to elucidate mechanisms and determine their relevance.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Non-DNA targeted effects of ionising radiation, which include genomic instability, and a variety of bystander effects including abscopal effects and bystander mediated adaptive response, have raised concerns about the magnitude of low-dose radiation risk. Genomic instability, bystander effects and adaptive responses are powered by fundamental, but not clearly understood systems that maintain tissue homeostasis. Despite excellent research in this field by various groups, there are still gaps in our understandfng of the likely mechanisms associated with non-DNA targeted effects, particularly with respect to systemic (human health) consequences at low and intermediate doses of ionising radiation. Other outstanding questions include links between the different non-targeted responses and the variations. in response observed between individuals and cell lines, possibly a function of genetic background. Furthermore, it is still not known what the initial target and early interactions in cells are that give rise to non-targeted responses in neighbouring or descendant cells. This paper provides a commentary on the current state of the field as a result of the non-targeted effects of ionising radiation (NOTE) Integrated Project funded by the European Union. Here we critically examine the evidence for non-targeted effects, discuss apparently contradictory results and consider implications for low-dose radiation health effects. (C) 2012 Elsevier B.V. All rights reserved.