Neutron diffractometer allows both magnetic and crystallographic analyses

Automatic double-crystal neutron diffractometer performs both crystal and magnetic structural analyses. This shielded installation has a goniometric turntable and electronic controls, and auxiliary equipment including a goniometer, diffraction electromagnet, two cryogenic dewars, and two diffraction furnaces

2-Amino-4-(4-chloro­phen­yl)-6-(pyrrolidin-1-yl)pyridine-3,5-dicarbonitrile

In the title compound, C17H14ClN5, two C atoms and their attached H atoms of the pyrrolidine ring are disordered over two sets of sites with an occupancy ratio of 0.638 (10):0.362 (10). The benzene and pyridine rings are inclined to one another by 60.57 (8)°. In the crystal, the amino group forms an N—H⋯N hydrogen bond with one of the cyano groups, linking the mol­ecules into chains along [010]

A Periaxonal Net in the Zebrafish Central Nervous System

We produced a monoclonal antibody, named A20, which specifically recognizes a 35 kDa protein and stains myelinated axons in zebrafish brain. The A20 antigen is located at the outside of the myelin layer of large axons, and comprises a fine meshwork composed of thin unit fibers about 1–2 μm in length and about 100–200 nm in thickness. The unit fibers form pentagonal and hexagonal structures, which further polymerize into an envelope structure on the axons. The A20 monoclonal antibody did not stain neuronal cell bodies nor synapses. Instead, the distribution of the A20 antigen was along axons, practically coincident with the distribution of myelin basic protein. The monoclonal antibody stained only axons in the central nervous system (CNS), and not the extracellular matrix surrounding Schwann cells. These results suggest that this antigenic meshwork (which we call the periaxonal net) is synthesized by oligodendrocytes. During the development of the zebrafish brain, the periaxonal net appeared after the formation of myelin on the axons. The periaxonal net developed first at the brain stem, then gradually appeared at the caudal end of the spinal cord. The thickness of the periaxonal net around the Mauthner axon changed during development. Although the thickness of the Mauthner axon continues to grow throughout life, the thickness of periaxonal net stopped growing at 6 months after fertilization

Quality differences assessment in canned sardine (Sardina pilchardus) by fluorescence detection

5 páginas, 4 figuras, 2 tablas.-- This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Agricultural and Food Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jf970056lChilled (0, 2, 6, 10, 13, and 15 days) and frozen (0, 0.5, 2, 4, 8, and 12 months) sardines were used to determine the influence of such storage times of fish over the quality of the final canned product. Traditional determinations of lipid quality (free fatty acids content, thiobarbituric acid index, and polyene index) were studied and compared with the formation of fluorescent compounds expressed as the ratio between fluorescence readings taken at two excitation/emission maxima (393/463 and 327/415 nm). No clear correlations were found between the common measurements of lipid deterioration and the time of storage prior to canning. Satisfactory correlations were found between the fluorescence ratio obtained from the filling medium of cans and the time of storage of the starting material (r = 0.90 and 0.91 in brine- and oil-canned samples, respectively). According to the present results, fluorescence detection of interaction compounds can provide a rapid and sensible method to assess quality differences in the final product as it relates to the quality of the raw material usedWe thank the Xunta de Galicia for financial support (Project XUGA 402 01B93).Peer reviewe

BIOMETRIA CORPORAL DE CABRITOS LACTENTES COM ACESSO AO CREEP FEEDING EM DIFERENTES IDADES

Objetivou-se com este trabalho avaliar o efeito do acesso ao creep feeding em diferentes idades sobre as medidas biométricas corporais de cabritos mestiços da raça Bôer. Foram utilizadas 12 cabras 7/8 Bôer no período de lactação com suas respectivas crias, distribuídas em três tratamentos. Os animais foram divididos entre o tratamento 70 dias, 50 dias e 30 dias de acesso ao creep feeding. Os dados foram coletados a cada 10 dias, durante os 70 dias de amamentação. A análise de variância e comparação entre médias foi realizada pelo teste Tukey (P<0,05). Os diferentes períodos influenciaram características de comprimento corporal, perímetro torácico e abdominal e altura de garupa, as quais apresentaram melhores resultados em grupos submetidos a maiores tempos de acesso à suplementação. Dentre os períodos de acesso ao creep feeding avaliados, o mais indicado para a produção eficiente de caprinos de corte, é o fornecimento de suplementação às crias por pelo menos 50 dias

DESENVOLVIMENTO PONDERAL DE CABRITOS LACTENTES COM ACESSO AO CREEP FEEDING EM DIFERENTES IDADES

Objetivou-se com este trabalho avaliar o efeito de diferentes períodos de acesso ao creep feeding sobre o ganho de peso, peso a desmama e condição corporal de cabritos mestiços da raça Bôer. Foram utilizadas 12 cabras 7/8 Bôer no período de lactação com suas respectivas crias, distribuídas em três tratamentos. Os animais foram divididos entre o tratamento 70 dias de acesso ao creep feeding, tratamento 50 dias de acesso ao creep feeding e tratamento 30 dias de acesso ao creep feeding. Os dados foram coletados a cada 10 dias, durante os 70 dias de amamentação. A análise de variância e comparação entre médias foi realizada pelo teste Tukey (P<0,05). Os diferentes períodos influenciaram as características de ganho de peso e peso vivo corporal, as quais apresentaram melhores resultados nos animais submetidos a maiores tempos de acesso à suplementação. Dentre os períodos de acesso ao creep feeding avaliados, o mais indicado para a produção eficiente de caprinos de corte, é o fornecimento de suplementação às crias por pelo menos 50 dias

Magnetism and the absence of superconductivity in the praseodymium–silicon system doped with carbon and boron

We searched for new structural, magnetic and superconductivity phases in the Pr-Si system using high-pressure high-temperature and arc melting syntheses. Both high and low Si concentration areas of the phase diagram were explored. Although a similar approach in the La-Si system produced new stable superconducting phases, in the Pr-Si system we did not find any new superconductors. At low Si concentrations, the arc-melted samples were doped with C or B. It was found that addition of C gave rise to multiple previously unknown ferromagnetic phases. Furthermore, X-ray refinement of the undoped samples confirmed the existence of the so far elusive Pr3Si 2 phase. © 2013 Elsevier B.V

Light-induced creation of defects and related phenomena in silicon-based amorphous semiconductors.

金沢大学理工研究域電子情報通信学系Light-induced creation of defects and their annealing process were studied by ESR, photoconductivity and photoluminescence measurements for a-Si//1// minus //xN//x:H and a-Si//1// minus //xC//x:H films besides a-Si:H films with various spin densities and H contents. The results show that the degradation of the photoconductivity and the photoluminescence is mainly attributed to creation of dangling bonds due to bond breaking