Campos Organizacionais: Seis Diferentes Leituras e a Perspectiva de Estruturação

The concept of the organizational field has been greatly dealt with in the literature on institutional theory in recent years. As the concept of field involves a relational and symbolic dimension, we propose that the theory of structuration, based on the logic of recursiveness between agency and structure should be adapted to the understanding of the field dynamically. In this way, the objective of this theoretical essay is to deal with the dynamic of the organizational field using structurationist logic, allowing that from this logic we recall both the importance of the practice in the structuration process of the organizational field and the historical and recursive character which may constrain or enable the actions of social actors. To this end, we revise the concept of field in different perspectives of analysis, reflecting on the implication of the theoretical presuppositions of each approach and then discuss in a critical manner the theoretical foundation of the structuration process of organizational fields based on the structurationist approach. We conclude the paper with propositions pertaining to the revision of the concept of field from a multiparadigmatic viewpoint in which structure and agency are recursively implied

The libraries that made SUCEST

A large-scale sequencing of sugarcane expressed sequence tags (ESTs) was carried out as a first step in depicting the genome of this important tropical crop. Twenty-six unidirectional cDNA libraries were constructed from a variety of tissues sampled from thirteen different sugarcane cultivars. A total of 291,689 cDNA clones were sequenced in their 5? and 3?end regions. After trimming low-quality sequences and removing vector and ribosomal RNA sequences, 237,954 ESTs potentially derived from protein-encoding messenger RNA (mRNA) remained. The average insert size in all libraries was estimated to be 1,250bp with the insert length varying from 500 to 5,000 bp. Clustering the 237,954 sugarcane ESTs resulted in 43,141clusters, from which 38% had no matches with existing sequences in the public databases. Around 53% of the clusters were formed by ESTs expressed in at least two libraries while 47% of the clusters are formed by ESTs expressed in only one library. A global analysis of the ESTs indicated that around 33% contain cDNA clones with full-length insert.1

Estudos soroepidemiológico e molecular de infecção por EV-71 no Estado do Pará, Brasil

In many countries, the Enterovirus 71 (EV-71) Picornaviridae family is associated to hand, foot and mouth disease in addition to acute neurological diseases while in Brazil these viruses are more closely associated to the latter group. The aim of this research was to use the first EV-71 isolate of the Northern region of Brazil in molecular and seroepidemiologic studies. Two (2.2%) out of 88 stool samples (44 cases of AFP), collected from January 1998 to December 2000 were positive for EV-71 isolation (73442/PA/99). Nucleotide sequence of the gen that codifies the VP1 protein showed that isolate 73442/PA/99 was similar to the EV-71 strains belonging to genotype B - more closely identified with EV-71 from North America. Neutralization test with 389 sera samples collected from January 1998 to November 2001, from individuals ranging from 0 to 15 years of age living in the city of Belém, State of Pará showed the following results in relation to isolate 73442/PA/99 and prototype BrCr: a total of 207 individuals (53.2%) had neutralization antibodies to both viruses, 167 (42.9%) had no antibodies and 15 showed the presence of neutralizing antibodies to one of the two viruses. Only 20.2% of the children aged 0 to 3 had neutralizing antibodies to EV-71, indicating that these children were more susceptible to the infection. Both the seroprevalence study and VP1 sequencing were important to demonstrate the spread and the molecular pattern of the EV-71 circulating in the Northern Region of Brazil.Em muitos países, o Enterovírus 71 (EV-71) família Picornaviridae é associado a doença de pé-mão e boca e doenças neurológicas agudas enquanto que no Brasil esse vírus está mais associado às últimas. O objetivo desta pesquisa foi utilizar em estudos moleculares e soroepidemiológicos, o primeiro isolamento de EV-71 obtido na região norte do Brasil. No período de janeiro de 1998 a dezembro de 2000 foram coletadas 88 amostras (44 casos de PFA) de fezes das quais, duas (2,2%) foram positivas para EV-71 (73442/PA/99). A seqüência de nucleotídeos do gen que codifica a proteína VP1 mostrou que o isolado 73442/PA/99 foi similar às cepas de EV-71 pertencentes ao grupo B- mais próxima das norte americanas. Teste de neutralização com 389 amostras de soro colhidas no período de janeiro de 1998 a novembro de 2001, de indivíduos com idade de 0 a 15 anos residentes na cidade de Belém, Estado do Pará mostrou os seguintes resultados em relação ao isolado 73442/PA/99 e ao protótipo BrCr: 207 indivíduos (53,2%) tinham anticorpos neutralizantes para ambos os vírus, 167 (42,9%) não tinham anticorpos e 15 tinham anticorpos para um dos dois vírus. Somente 20,2% das crianças com idade de 0 a 3 anos tinham anticorpos neutralizantes para EV-71, indicando que essas crianças estavam mais suscetíveis à infecção. Tanto o estudo de soroprevalência quanto o de sequenciamento da VP1 foram importantes para demonstrar a propagação e o padrão molecular do EV-71 circulante na região norte do Brasil

Tolerance to water deficit of cowpea genotypes

Objetivou-se, neste trabalho, avaliar o efeito do déficit hídrico sobre as características fisiológicas e produtivas do feijão-caupi e selecionar genótipos tolerantes à seca. Avaliaram-se a condutância estomática, o potencial hídrico foliar, a temperatura das folhas e a produtividade de grãos de 20 genótipos de feijão-caupi nas condições de solo e clima de Teresina, Piauí, no ano de 2008 e se conduziram dois experimentos em delineamento de blocos ao acaso com 20 tratamentos e quatro repetições, um sob déficit hídrico durante a fase reprodutiva e outro sob irrigação plena, para fins de comparação. O déficit hídrico, que foi obtido aplicando-se aproximadamente metade da lâmina requerida pelo feijão-caupi, reduziu em 72% a condutância estomática, 62% o potencial de água nas folhas, 60% a produção de grãos e aumentou em 11,7% a temperatura foliar. Nas condições de déficit hídrico treze genótipos produziram acima da média (466 kg ha-1), com destaque para o BRS-Paraguaçu, Pingo-de-ouro-1-2 e Pingo-de-ouro-2, que produziram 712 kg ha-1, 667 kg ha-1 e 642 kg ha-1, respectivamente. Em média, a produtividade de grãos dos genótipos sob irrigação plena foi 150% superior.The objective of this study was to evaluate physiological and productive characteristics of cowpea under water deficit and total irrigation, under soil and climate conditions of Teresina, Piauí State, in 2008. The stomatal conductance, leaf water potential, leaf temperature and grain yield of twenty cowpea cultivars were evaluated. Two experiments were carried out in a randomized block design with 20 treatments and four replications, one under water deficit during the reproductive phase and another one under total irrigation. The water deficit was obtained applying half of the water depth required by cowpea. The water deficit reduced 72% of the stomatal conductance, 40% the leaf transpiration, 62% of the leaf water potential, 60% of the grain yield and increased 11.7% the leaf temperature. Under water deficit, 13 genotypes produced above average (466 kg ha-1), and BRS-Paraguaçu, Pingo-de-ouro-1-2 and Pingo-de-ouro-2 presented the best grain yield with712 kg ha-1, 667 kg ha-1 and 642 kg ha-1, respectively. The average grain yield of the experiment under total irrigation was 150% higher

N′-[(2E)-3-Phenyl­prop-2-eno­yl]benzo­hydrazide

In the title compound, C16H14N2O2, the conformation about the C=C bond is E, and the two amide groups are effectively orthogonal [the C—N—N—C torsion angle is 104.5 (2)°]. In the crystal structure, the amide groups groups associate via N–H⋯O hydrogen bonding, forming supra­molecular tapes with undulating topology along the c-axis direction

AVALIAÇÃO DO POTENCIAL ANTIOXIDANTE DE Myrciaria jabuticaba (Vell) Berg AO LONGO DE SEU DESENVOLVIMENTO FISIOLÓGICO

Introdução e objetivos: A Myrciaria jabuticaba (Vell) Berg, é a mais apreciada e doce das jabuticabas e a mais intensamente plantada, apresenta fruto de epicarpo fino, quase preto e muito saboroso, com maturação precoce¹. Apesar da grande produção de jabuticaba no Brasil ainda há poucos estudos relacionados ao desenvolvimento do fruto. Desta forma objetivou-se com o presente trabalho caracterizar frutos de jabuticaba ao longo do seu desenvolvimento quanto ao seu potencial antioxidante. Metodologia: Os frutos foram coletados na Fazenda e Vinícola Jabuticabal a 35,6 Km de Goiânia- GO. A colheita dos frutos iniciou-se aos 10 dias após a antese (DAA) e prorrogou-se até o completo amadurecimento dos frutos, com intervalos de oito dias entre as coletas. O período compreendido entre a antese (abertura da flor) e o amadurecimento foi de 34 dias. O potencial antioxidante foi determinado pelo método do DPPH2. O grau de descoloração do radical DPPH, a 517 nm pela ação dos antioxidantes, foi medido espectrofotometricamente no extrato aquoso e os resultados expressos em % de descoloração. Resultados e discussões: Pode-se notar que os frutos apresentaram maior potencial antioxidante aos 10 DAA, com valor médio de 76,90% de descoloração, porém com amadurecimento dos frutos estes valores foram reduzidos, e aos 34 DAA apresentou 30,17% de descoloração. Estes resultados são corroborados com outros frutos como physalis3 e acerola4, os quais também apresentaram redução ao longo do desenvolvimento. Este fato pode ser justificado pela possível redução de outros compostos presentes no fruto, que apresentam potencial antioxidante, como compostos fenólicos, vitamina C e antocianinas. Conclusões: Pode concluir que para o melhor aproveitamento/absorção do potencial antioxidante dos frutos de jabuticaba, é indicado que estes sejam consumidos antes de seu completo amadurecimento

Crystal structures and Hirshfeld surface analyses of (E)-N′-benzylidene-2-oxo-2H-chromene-3-carbohydrazide and the disordered hemi-DMSO solvate of (E)-2-oxo-N′-(3,4,5-trimethoxybenzylidene)-2H-chromene-3-carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former

The crystal structures of the disordered hemi-DMSO solvate of (E)-2-oxo-N'-(3,4,5-tri-meth-oxy-benzyl-idene)-2H-chromene-3-carbohydrazide, C20H18N2O6·0.5C2H6OS, and (E)-N'-benzyl-idene-2-oxo-2H-chromene-3-carbohydrazide, C17H12N2O3 (4: R = C6H5), are discussed. The non-hydrogen atoms in compound [4: R = (3,4,5-MeO)3C6H2)] exhibit a distinct curvature, while those in compound, (4: R = C6H5), are essential coplanar. In (4: R = C6H5), C-H⋯O and π-π intra-molecular inter-actions combine to form a three-dimensional array. A three-dimensional array is also found for the hemi-DMSO solvate of [4: R = (3,4,5-MeO)3C6H2], in which the mol-ecules of coumarin are linked by C-H⋯O and C-H⋯π inter-actions, and form tubes into which the DMSO mol-ecules are cocooned. Hirshfeld surface analyses of both compounds are reported, as are the lattice energy and inter-molecular inter-action energy calculations of compound (4: R = C6H5).info:eu-repo/semantics/publishedVersio

Anomalous oriented attachment growth behavior on SnO2 nanocrystals

This work reports a detailed characterization of an anomalous oriented attachment behaviour for SnO2 nanocrystals. Our results evidenced an anisotropic growth for two identical 〈110〉 directions, which are equivalent according to the SnO2 crystallographic structure symmetry. A hypothesis is proposed to describe this behaviour

5-(3-Nitro­benz­yl)-1,3,4-thia­diazol-2-amine

In the title mol­ecule, C9H8N4O2S, the dihedral angle between the thia­diazole and benzene rings is 73.92 (8)° and the thia­diazole group S atom is orientated towards the benzene ring, the central S—C—C—C torsion angle being 45.44 (18)°. In the crystal, supra­molecular tapes mediated by N—H⋯N hydrogen bonds and comprising alternating eight-membered {⋯HNCN}2 and 10-membered {⋯HNH⋯NN}2 synthons are formed along [010]. The tapes are consolidated into a three-dimensional network by a combination of C—H⋯O, C—H⋯S and C—H⋯π inter­action