Diário da Constituinte [gravação de vídeo] : [programa n. 228]

Governadores do Norte, Nordeste e Centro-Oeste se reúnem com a bancada de constituintes dessas três regiões com o intuito de apoiar propostas que melhorem a distribuição de renda. O Deputado Heráclito Forte (PMDB-PI) declara que essas regiões unidas propiciarão uma maioria suficiente para que sejam tratadas de igual para igual com as demais. O Deputado Délio Braz (PMDB-GO) reclama que São Paulo, Minas Gerais e Rio de Janeiro sempre ficaram com a maior parte dos recursos e que as demais regiões também precisam se desenvolver. Tasso Jereissati, governador do Ceará, declara que, em qualquer circunstância, os Estados pobres só têm condição de fazer valer os seus direitos à medida que estejam unidos. Marcelo Miranda, governador do Mato Grosso do Sul, afirma que a hora é de distribuir recursos com os Estados e Municípios. O Deputado Albérico Cordeiro (PFL-AL) esclarece que a obtenção de mais recursos para as regiões mais pobres beneficia as regiões mais ricas, pois evitará o aumento dos bolsões de miséria criados pelo êxodo do Norte e do Nordeste. Henrique Santillo, governador de Goiás, acredita que o país só se transformará numa nação moderna e justa se tiver condições de ocupar racionalmente o seu território e desconcentrar o desenvolvimento econômico e social. Na sessão O Povo Pergunta, cidadão quer saber o que a Assembleia Nacional Constituinte (ANC) pode fazer para democratizar a justiça no país. O Deputado Silvio Abreu (PMDB-MG) responde que a criação da Defensoria Pública é muito importante porque atingirá todos os segmentos da população. Reunião da Comissão de Sistematização da Assembleia Nacional Constituinte (ANC) discute três assuntos: a criação do Estado do Triângulo em Minas Gerais; propostas em benefício dos deficientes físicos e a questão do plebiscito. O Deputado Chico Humberto (PDT-MG) defende a criação do Estado do Triângulo. O Deputado Nelson Seixas (PDT-SP), que é também Presidente da Federação Nacional das APAEs, defende as propostas que tratam sobre o deficiente físico. O Deputado Lysanêas Maciel (PDT-RJ) apresentou proposta para a realização de um plebiscito quarenta e cinco dias após a promulgação da nova Carta .

beta-delayed fission of Ac-228

The basic process of an exotic decay mode namely P-delayed fission is simply introduced. The progress status of the study in the world is essentialized. The observation of P-delayed fission of Ac-228 is reported. The radium was radiochemically separated from natural thorium. Thin Ra sources in which Ac-228 was got through Ra-228 ->(beta-) Ac-228 were prepared for observing fission fragments from beta-delayed fission Ac-228. They exposed to the mica fission track detectors, and measured by an HPGe gamma-ray detector. The beta-delayed fission events of Ac-228 were observed and its beta-delayed fission probability was found to be (5 +/- 2) x 10(-12).

Search for beta-delayed fission of Ac-228

Radium was radiochemically separated from natural thorium. Thin Ra-228 ->beta Ac-228 sources were prepared and exposed to mica fission track detectors, and measured by an HPGe gamma-ray detector. The beta-delayed fission events of Ac-228 were observed and its beta-delayed fission probability was found to be (5 +/- 2)x10(-12).

铅－210、钍－228、钚年代学在滇池、洞庭湖和昆明湖环境问题上的应用

笔者在大量的文献调研基础上，试图利用 ~(210)Pb、~(228)Th 等短半衰期的铀系子体确定某些湖泊沉积物的沉积速率及年代，结合 239，240 pu 在我国内陆湖泊的分布规律，以全球 pu 随时间的分布规律探索其测年的可能性，以多核素方法探讨测年结果的可靠性，建立沉积的时间尺度。同时，利用这些核素作示踪研究沉积物表层的生物扰动所造成的混合效应。通过对沉积物垂直方向上物质成份。矿物成份和元素分析，研究沉积环境的演化及近百年工业污染的历史。根据所选湖泊的纬度差别，研究湖泊沉积环境和沉积物类型对所研究的核素方法的影响。本论文是首次利用多核素方法研究我国一些内陆湖泊的环境问题，对在我国继续开展这方面研究具有重要意义。

C 228 INST-D 2013. 390 Juguetes y productos decorativos elaborados en madera tallada y torneada.

14 fotografías, trece a color.

Resolución No. 228 - SIC: Por la cual se resuelve un recurso de apelación

Servicios registrales

228 Institutos Nacionales y 242 Secciones Delegadas de Enseñanza Media en España.

Se especifica la creación, ampliación y mejora de centros debido a la intensificación de la política de promoción y establecimiento de Centros oficiales por toda la geografía española: 8 Institutos Nacionales; 20 Secciones Delegadas; 14 Secciones Filiales; 16 Colegios Libres de Enseñanza Media de Grado Elemental adoptados; la clasificación en otras categorías de Colegios no Oficiales de Enseñanza Media; la autorización de Centros especializados para el Curso Preuniversitario; el reconocimiento de 2 Colegios Menores; se detallan las subvenciones concedidas a los Centros de Enseñanza Media para la creación de nuevos puestos escolares; por último, se detallan algunas obras de interés social en Centros de Enseñanza Media.

Pb-210-Ra-226 and Ra-228-Th-232 systematics in young arc lavas: implications for magma degassing and ascent rates

New data show that island arc rocks have (Pb-210/Ra-226)(o) ratios which range from as low as 0.24 up to 2.88. In contrast, (Ra-22S/Th-232) appears always within error of I suggesting that the large Ra-226-excesses observed in arc rocks were generated more than 30 years ago. This places a maximum estimate on melt ascent velocities of around 4000 m/year and provides further confidence that the Ra-226 excesses reflect deep (source) processes rather than shallow level alteration or seawater contamination. Conversely, partial melting must have occurred more than 30 years prior to eruption. The Pb-210 deficits are most readily explained by protracted magma degassing. Using published numerical models, the data suggest that degassing occurred continuously for periods up to several decades just prior to eruption but no link with eruption periodicity was found. Longer periods are required if degassing is discontinuous, less than 100% efficient or if magma is recharged or stored after degassing. The long durations suggest much of this degassing occurs at depth with implications for the formation of hydrothermal and copper-porphyry systems. A suite of lavas erupted in 1985-1986 from Sangeang Api volcano in the Sunda arc are characterised by deficits of Pb-210 relative to Ra-226 from which 6-8 years of continuous Rn-222 degassing would be inferred from recent numerical models. These data also form a linear (Pb-210)/Pb-(Ra-226)/Pb array which might be interpreted as a 71-year isochron. However, the array passes through the origin suggesting displacement downwards from the equiline in response to degassing and so the slope of the array is inferred not to have any age significance. Simple modelling shows that the range of (Ra-226)/Pb ratios requires thousands of years to develop consistent with differentiation occurring in response to cooling at the base of the crust. Thus, degassing post-dated, and was not responsible for magma differentiation. The formation, migration and extraction of gas bubbles must be extremely efficient in mafic magma whereas the higher viscosity of more siliceous magmas retards the process and can lead to Pb-210 excesses. A possible negative correlation between (Pb-210/Ra-226)(o) and SO2 emission rate requires further testing but may have implications for future eruptions. (C) 2004 Elsevier B.V. All rights reserved.

Pb-210-Ra-226 and Ra-228-Th-232 systematics in young arc lavas: implications for magma degassing and ascent rates

New data show that island arc rocks have (Pb-210/Ra-226)(o) ratios which range from as low as 0.24 up to 2.88. In contrast, (Ra-22S/Th-232) appears always within error of I suggesting that the large Ra-226-excesses observed in arc rocks were generated more than 30 years ago. This places a maximum estimate on melt ascent velocities of around 4000 m/year and provides further confidence that the Ra-226 excesses reflect deep (source) processes rather than shallow level alteration or seawater contamination. Conversely, partial melting must have occurred more than 30 years prior to eruption. The Pb-210 deficits are most readily explained by protracted magma degassing. Using published numerical models, the data suggest that degassing occurred continuously for periods up to several decades just prior to eruption but no link with eruption periodicity was found. Longer periods are required if degassing is discontinuous, less than 100% efficient or if magma is recharged or stored after degassing. The long durations suggest much of this degassing occurs at depth with implications for the formation of hydrothermal and copper-porphyry systems. A suite of lavas erupted in 1985-1986 from Sangeang Api volcano in the Sunda arc are characterised by deficits of Pb-210 relative to Ra-226 from which 6-8 years of continuous Rn-222 degassing would be inferred from recent numerical models. These data also form a linear (Pb-210)/Pb-(Ra-226)/Pb array which might be interpreted as a 71-year isochron. However, the array passes through the origin suggesting displacement downwards from the equiline in response to degassing and so the slope of the array is inferred not to have any age significance. Simple modelling shows that the range of (Ra-226)/Pb ratios requires thousands of years to develop consistent with differentiation occurring in response to cooling at the base of the crust. Thus, degassing post-dated, and was not responsible for magma differentiation. The formation, migration and extraction of gas bubbles must be extremely efficient in mafic magma whereas the higher viscosity of more siliceous magmas retards the process and can lead to Pb-210 excesses. A possible negative correlation between (Pb-210/Ra-226)(o) and SO2 emission rate requires further testing but may have implications for future eruptions. (C) 2004 Elsevier B.V. All rights reserved.

Doses from Rn-222, Ra-226, and Ra-228 in groundwater from Guarani aquifer, South America

Groundwater samples were analysed for Rn-222, Ra-226, and Ra-228 in Guarani aquifer spreading around I million kin 2 within four countries in South America, and it was found that their activity concentrations are lognormally distributed. Population-weighted average activity concentration for these radionuclides allowed to estimate a value: either slightly higher (0.13 mSv/year) than 0.1 mSv for the total effective dose or two times higher (0.21 mSv/year) than this limit, depending on the choice of the dose conversion factor. Such calculation adds useful information for the appropriate management of this transboundary aquifer that is socially and economically very important to about 15 million inhabitants living in Brazil, Argentina, Uruguay and Paraguay. (C) 2004 Elsevier Ltd. All rights reserved.

A method for evaluating Ra-228 in environmental matrices and its use at Pocos de Caldas plateau, Brazil

This work describes a methodology developed for performing the extraction, detection and quantification of Ra-228 in waters, suspended solids and sediments. The technique proved to be useful for analyzing samples from the hydrological environment of Morro do Ferro, Pocos de Caldas plateau, Brazil. The 228Ra activity in underground waters of 5 boreholes drilled in the area varied from 0.02 up to 14.5 Bq/l, whereas for the surficial waters the variation was from 0.04 to 0.51 Bq/l; for the suspended solids, the values ranged from 1.5 up to 419 Bq/g, whereas it was possible to find a value of 2.04 Bq/g for the sediments. These results show the applicability of the method for characterizing different matrices of environmental interest. (C) 2002 Elsevier B.V. Ltd. All rights reserved.