Spin Transfer from a Ferromagnet into a Semiconductor through an Oxide barrier

We present results on the magnetoresistance of the system Ni/Al203/n-doped Si/Al2O3/Ni in fabricated nanostructures. The results at temperature of 14K reveal a 75% magnetoresistance that decreases in value up to approximately 30K where the effect disappears. We observe minimum resistance in the antiparallel configurations of the source and drain of Ni. As a possibility, it seems to indicate the existence of a magnetic state at the Si/oxide interface. The average spin diffusion length obtained is of 650 nm approximately. Results are compared to the window of resistances that seems to exist between the tunnel barrier resistance and two threshold resistances but the spin transfer seems to work in the range and outside the two thresholds

A pereira cv. Williams ou Bartlett.

A pereira cv. Williams, também conhecida como "Bartlett" ou "Williams Bon Chrétien", é descrita nesse artigo quanto a sua origem, adaptação climática, botânica e características agronômicas. Também são apresentados os principais aspectos morfológicos, fisiológicos e de resistência a doenças da planta, uso de porta-enxertos e plantas polinizadoras. Palavras chave: Pyrus communis, origem, características, resistência a doenças, porta-enxertos, colheita e armazenagem de frutos. The pear cv. Williams or Bartlett The pear cv. Williams, also known as ‘Bartlett’ or ‘Williams’ Bon Chrétien’, is described in this article concerning to its origin, climate adaptation, botanical and agronomic characteristics. It also presents the main morphological, physiological disease resistance of the plants, the use of rootstocks and plants pollinators. Index terms: Pyrus communis, origin, characteristics, diseases resistance, rootstocks, harvest and storage of fruits

Functional diversification of maize RNA polymerase IV and V subtypes via alternative catalytic subunits.

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Avaliação de cultivares de pereiras europeias para a região de São Joaquim, SC.

A produção de peras no Brasil ainda é insignificante, sendo 90% da fruta consumida oriunda de importações. Um dos principais problemas condicionantes desse cenário é a falta de cultivares adaptadas às condições do país

Risk Perception and Protective Health Measure Regarding COVID-19 among Nepali Labour Migrants’ Returnee from India

Thousands of Nepali migrant workers returned home from India due to the impact of the COVID-19 pandemic. This cross-sectional study examines the association between risk perception and protective behaviour regarding COVID-19 in returnee migrant workers. The study used opportunistic sampling and 384 participants, based in a quarantine center on return from India, volunteered. Using the health belief model (HBM) as a theoretical framework, a structured interview questionnaire was designed and applied as the key data collection tool. Three health workers were interviewed face-to-face. The study showed that the perceived risk of COVID-19 among participants was medium to low. Participants perceived few barriers and had low self-efficacy levels compared to other constructs. This study further showed that participants were more likely to follow a range of protective health behaviours, but not found all. The study revealed a significant association between all risk perception constructs and protective behaviours (p=< 0.05). This study accordingly highlighted a significant relationship between the respondents’ risk perception level and protective health behaviours. The study envisaged that public awareness of risk to the people who returned from India is essential to increase risk perception during the outbreak

Genes for the Major Structural Components of Thermotogales Species’ Togas Revealed by Proteomic and Evolutionary Analyses of OmpA and OmpB Homologs

The unifying structural characteristic of members of the bacterial order Thermotogales is their toga, an unusual cell envelope that includes a loose-fitting sheath around each cell. Only two toga-associated structural proteins have been purified and characterized in Thermotoga maritima: the anchor protein OmpA1 (or Ompα) and the porin OmpB (or Ompβ). The gene encoding OmpA1 (ompA1) was cloned and sequenced and later assigned to TM0477 in the genome sequence, but because no peptide sequence was available for OmpB, its gene (ompB) was not annotated. We identified six porin candidates in the genome sequence of T. maritima. Of these candidates, only one, encoded by TM0476, has all the characteristics reported for OmpB and characteristics expected of a porin including predominant β-sheet structure, a carboxy terminus porin anchoring motif, and a porin-specific amino acid composition. We highly enriched a toga fraction of cells for OmpB by sucrose gradient centrifugation and hydroxyapatite chromatography and analyzed it by LC/MS/MS. We found that the only porin candidate that it contained was the TM0476 product. This cell fraction also had β-sheet character as determined by circular dichroism, consistent with its enrichment for OmpB. We conclude that TM0476 encodes OmpB. A phylogenetic analysis of OmpB found orthologs encoded in syntenic locations in the genomes of all but two Thermotogales species. Those without orthologs have putative isofunctional genes in their place. Phylogenetic analyses of OmpA1 revealed that each species of the Thermotogales has one or two OmpA homologs. T. maritima has two OmpA homologs, encoded by ompA1 (TM0477) and ompA2 (TM1729), both of which were found in the toga protein-enriched cell extracts. These annotations of the genes encoding toga structural proteins will guide future examinations of the structure and function of this unusual lineage-defining cell sheath

High-Performance Work Systems and Organizational Performance in Emerging Economies: Evidence from MNEs in Turkey

This study examines the association between the usage of high-performance work systems (HPWS) by subsidiaries of multinational enterprises (MNEs) in Turkey and employee and subsidiary level outcomes. The study is based on a survey of 148 MNE subsidiaries operating in Turkey. The results show that the usage of HPWS has a significant positive impact on employee effectiveness. However, their impact on employee skills and development, and organizational financial performance are far less clear. Our findings highlight the extent to which HWPS need to be adapted to take account of context-specific institutional realities. © 2014 Springer-Verlag Berlin Heidelberg