The preparation of zinc(II) and cadmium(II) complexes of the pentadentate N3S2 ligand formed from 2,6-diacetylpyridine and S-benzyldithiocarbazate (H2SNNNS) and the X-ray crystal structure of the novel dimeric [Zn2(SNNNS)2] complex

The pentadentate chelating agent, 2,6-diacetylpyridinebis(S-benzyldithiocarbazate) (H2SNNNS) reacts with zinc(II) and cadmium(II) ions forming stable complexes of empirical formula, [M(SNNNS)] (M=Zn2+, Cd2+; SNNNS2 =doubly deprotonated anionic form of the Schiff base). These complexes have been characterized by a variety of physico-chemical techniques. IR and H-1 NMR spectral evidence indicate that the Schiff base coordinates to the zinc(II) and cadmium(II) ions via the pyridine nitrogen atoms, the azomethine nitrogen atoms and the mercaptide sulfur atoms. The crystal and molecular structure of the zinc(II) complex has been determined by X-ray diffraction. The complex is a dimer in which the pyridine nitrogen atom,the azomethine nitrogen atom and the thiolate sulfur atom from one ligand coordinate to one of the zinc(II) ions whereas the azomethine and thiolate sulfur atoms from another ligand complete pentacoordination around the zinc(II) ion, the ligands being coordinated in their deprotonated forms. The coordination geometry about each zinc(II) can be considered as intermediate between a square-pyramid and trigonal-bipyramid. The cadmium(II) complex is also assigned with a dimeric structure. (C) 2003 Elsevier Ltd. All rights reserved.

Geometric isomers of chloro(6-methyl-1,4,8,11-tetraazacyclotetradecane-6-amine)cobalt(III) tetrachlorozincate(II)

The crystal structures of a pair of cis and trans isomers of the macrocyclic chloropentaamine title complex, as their tetrachlorozincate(II) salts, [CoCl(C11H27N5)][ZnCl4], are reported. The two distinct isomeric forms lead to significant variations in the Co-N bond lengths and, furthermore, hydrogen bonding between the complex ions is influenced by the folded (cis) or planar (trans) conformations of the coordinated ligand.

Low-temperature single-crystal Raman and neutron-diffraction study of the hydrogenous ammonium copper(II) tutton salt and the deuterated analogue in the metastable state

Low-temperature (15 K) single-crystal neutron-diffraction structures and Raman spectra of the salts (NX4)(2)[CU(OX2)(6)](SO4)(2), where X = H or D, are reported. This study is concerned with the origin of the structural phase change that is known to occur upon deuteration. Data for the deuterated salt were measured in the metastable state, achieved by application of 500 bar of hydrostatic pressure at similar to303 K followed by cooling to 281 K and the subsequent release of pressure. This allows for the direct comparison between the hydrogenous and deuterated salts, in the same modification, at ambient pressure and low temperature. The Raman spectra provide no intimation of any significant change in the intermolecular bonding. Furthermore, structural differences are few, the largest being for the long Cu-O bond, which is 2.2834(5) and 2.2802(4) Angstrom for the hydrogenous and the deuterated salts, respectively. Calorimetric data for the deuterated salt are also presented, providing an estimate of 0.17(2) kJ/mol for the enthalpy difference between the two structural forms at 295.8(5) K. The structural data suggest that substitution of hydrogen for deuterium gives rise to changes in the hydrogen-bonding interactions that result in a slightly reduced force field about the copper(II) center. The small structural differences suggest different relative stabilities for the hydrogenous and deuterated salts, which may be sufficient to stabilize the hydrogenous salt in the anomalous structural form.

Structural definition of the low-temperature phase transition of tris(ethane-1,2-diamine)zinc(II) dinitrate

The 93 K X-ray crystal structure of tris(ethane-1,2-diamine)zinc(II) dinitrate is reported. As predicted by the spectroscopic studies of other workers, there is a reversible phase transition of the structure at low temperature. We have determined this temperature to be 143 K. The structure at this temperature and below resembles that of the room temperature structure, except the crystallographic D-3 symmetry of the complex cation (296 K) is lowered to C-2 ( below 144 K) by subtle changes in cation-anion hydrogen bonding. No change in the conformation of the cation or its bond lengths and angles was found.

Low temperature induced spikelet sterility in rice. II. Effects of panicle and root temperatures

Low temperatures impose restrictions on rice (Oryza sativa L.) production at high latitudes. This study is related to low temperature damage that can arise mid-season during the panicle development phase. The objective of this study was to determine whether low temperature experienced by the root, panicle, or foliage is responsible for increased spikelet sterility. In temperature-controlled glasshouse experiments, water depth, and water and air temperatures, were changed independently to investigate the effects of low temperature in the root, panicle, and foliage during microspore development on spikelet sterility. The total number of pollen and number of engorged pollen grains per anther, and the number of intercepted and germinated pollen grains per stigma, were measured. Spikelet sterility was then analysed in relation to the total number of pollen grains per spikelet and the efficiency with which these pollen grains became engorged, were intercepted by the stigma, germinated, and were involved in fertilisation. There was a significant combined effect of average minimum panicle and root temperatures on spikelet sterility that accounted for 86% of the variation in spikelet sterility. Total number of pollen grains per anther was reduced by low panicle temperature, but not by low root temperature. Whereas engorgement efficiency ( the percentage of pollen grains that were engorged) was determined by both root and panicle temperature, germination efficiency (the percentage of germinated pollen grains relative to the number of engorged pollen grains intercepted by the stigma) was determined only by root temperature. Interception efficiency (i.e. percentage of engorged pollen grains intercepted by the stigma), however, was not affected by either root or panicle temperature. Engorgement efficiency was the dominant factor explaining the variation in spikelet sterility. It is concluded that both panicle and root temperature affect spikelet sterility in rice when the plant encounters low temperatures during the microspore development stage.

A seguridade social no Brasil e os obst??culos institucionais ?? sua implementa????o

An??lise hist??rico-administrativa da forma????o do sistema de seguridade social no Brasil, enfatizando alguns dos principais aspectos condicionantes da sua gest??o. Registra as id??ias-for??a do modelo de prote????o social adotado em 1988, contextualizadas no processo de evolu????o das pol??ticas sociais de Estado; descreve e discute os problemas constatados na operacionaliza????o recente das pol??ticas p??blicas de sa??de, assist??ncia e previd??ncia social, vistas sob a ??tica dos seus processos de planejamento e or??amenta????o, das estruturas organizacionais formais e das pr??ticas diretivas e de controle, e da articula????o intergovernamental, conduzindo ?? avalia????o de desempenho do sistema atual e a propostas da sua consolida????o, com base nos princ??pios de descentraliza????o, controle social e manuten????o de um permanente processo de avalia????o institucional.

Presta????o de contas ordin??ria anual: relat??rio de gest??o do exerc??cio de 2010

Relat??rio de Gest??o do exerc??cio de 2010 apresentado aos ??rg??os de controle interno e externo como presta????o de contas anual que a ENAP est?? obrigada nos termos do art. 70 da Constitui????o Federal, elaborado de acordo com as disposi????es da IN TCU n?? 63/2010, da DN TCU n?? 107/2010, da Portaria TCU n?? 277/2010 e das orienta????es do ??rg??o de controle interno (Portaria CGU n?? 2546/2010)

Programa Eurosocial II: plan anual de acci??n 2014

O presente Plano Anual de A????o (PAA 2014) inscreve-se em clara continuidade com os precedentes exerc??cios program??ticos do programa EUROsocial II. No entanto, na medida que se passou o equador e se entra na reta final do Programa, se realizou um grande esfor??o para concentrar a????es e se focar em pa??ses que apresentam menos riscos e maiores condi????es de viabilidade para o alcance dos resultados esperados. Neste sentido, no ano 2014 vai representar um ponto de inflex??o, no que culminar?? grande parte das a????es do Programa, documentar-se-?? uma boa parte dos resultados conseguidos, projetando para o ano 2015 linhas de trabalho mais intersetoriais e estrat??gicas. Por conseguinte tem-se um PAA mais simplificado e melhor estruturado (de 10 ??reas tem??ticas passou-se a 4 macro-??reas), com uma dimens??o regional mais potente que tem permitido elevar a dimens??o estrat??gica do programa, e com a????es mais interconectadas e coerentes que respondem melhor a uma vis??o unit??ria do Programa. Neste exerc??cio de programa????o tanto os s??cios operativos como os s??cios coordenadores t??m sabido conjugar melhor os dif??ceis equil??brios que deve manter o programa: orienta????o a demanda vs. gest??o para resultados; dimens??o regional vs. abordagem de problem??ticas a n??vel nacional; dimens??o estrat??gica vs. dimens??o operativa. Tamb??m se incorporou algumas das recomenda????es realizadas por parte da avalia????o de meio de percurso que se realizou no segundo semestre do 2013.

Colet??nea de pol??ticas p??blicas: volume 1: pref??cio

Espera-se, com essas publica????es, contribuir para aumentar o conhecimento e o uso das informa????es dispon??veis sobre os temas tratados, bem como para incentivar o debate e a reflex??o cr??tica sobre os paradigmas fundadores dos campos planejamento, or??amento e pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: apresenta????o

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: introdu????o

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: introdu????o ?? teoria da pol??tica p??blica

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: pol??tica y pol??ticas p??blicas

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: definici??n del problema. Relevancia p??blica y formaci??n de la agenda de actuaci??n de los poderes p??blicos

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.

Colet??nea de pol??ticas p??blicas: volume 1: os n??veis de an??lise das pol??ticas p??blicas

O principal objetivo deste livro ?? constituir uma fonte de pesquisa para o estudo do processo de produ????o e implementa????o de pol??ticas p??blicas. Por meio de textos selecionados, analisa-se o pr??prio conceito de pol??ticas p??blicas, discute-se as defini????es utilizadas para distinguir suas diversas fases e apresenta-se algumas das principais correntes te??ricas de an??lise sobre o processo de pol??ticas p??blicas.