Npn
Mostrando 25-36 de 45 artigos, teses e dissertações.
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25. Estudo de indices quimicos, sensoriais, microbiologicos e intrumentais para avaliação do frescor de lulas (Loligo plei, Blainville, 1823) armazenadas em gelo
Loligo plei is one of major species of squid caught in brazilian seawater. To study the efficiency of tests used like freshness indices and the shelf life of Loligo plei, squids of this species were caught by hand jiggers or purchased at a local market and stored whole in contact ice (CCG) or in non-contact ice (SCG), in polyethylene bags, during a 16 and 15
Publicado em: 1999
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26. Modelamento de transistores bipolares de heterojunção
A study about current transport mechanism through a heterojunction is presented. Drift and diffusion mechanism are not enough to describe the electrical current (due to a spike in the conduction band of the Npn transistor). This has led to the introduction of the Thermionic-Emission mechanism. The Ebers-Moll and Gummel-Poon models are also compatible with th
Publicado em: 1995
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27. Conversão analogico-digital ultra-rapida em corrente em tecnologia bipolar - nova proposta
Neste trabalho apresentamos uma nova técnica de conversão analógico-digital ultra-rápida de corrente que denominamos semi-flash. Um conversor A/D de 6 bits em tecnologia bipolar todo NPN foi projetado e simulado numericamente pelo programa SPICE 2. Para isso, empregou-se os parâmetros de processo da SID-Microeletrônica - Contagem - Minas Gerais, uma te
Publicado em: 1990
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28. Parametros quimicos e sensoriais para identificação da especie biologica utilizada na elaboração de enlatados de atum e bonito
In the first instance an attempt was made to confirm that the trimethylamine oxide (THA-O) of red meat fish is completelv reduced to trimethvlamine when these fish were submitted to high temperatures, as in the case of canned tunas and bonitos. An attempt was made to use the following chemical determination to identifv the biological species employed in the
Publicado em: 1988
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29. APLICAÇÃO DE TÉCNICAS DE OTIMIZAÇÃO MULTICRITÉRIOS AO PROJETO DE CIRCUITOS NÃO LINEARES / MULTICRITERIA OPTMIZATION TECHNIQUES APPLIED TO THE DESIGN OF NON LINEAR CIRCUITS
As técnicas de otimização multicritérios, que tiveram sua origem na área econômica, são necessárias na busca de soluções em qualquer ambiente onde existam objetivos competindo entre si. Nestes ambientes pode não existir uma solução ótima para determinado problema e sim soluções de compromisso entre os vários objetivos conflitantes. Uma das m
Publicado em: 1984
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30. Obtenção de um processo para a confecção de circuitos digitais I2L (logica de injeção integrada) e circuitos analogicos de alta voltagem na mesma pastilha
Quando apresentada em 1972, uma das principais promessas da tecnologia I2L era a possibilidade de confeccionar circuitos digitais e analógicos na mesma pastilha. Entretanto, os requisitos necessários para a confecção dos circuitos I2L limitam severamente o desempenho dos transistores NPN da parte analogica da pastilha, que apresentam tensões de ruptura
Publicado em: 1981
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31. Neuropilin 1-Sema Signaling Regulates Crossing of Cingulate Pioneering Axons during Development of the Corpus Callosum
Pioneer axons from the cingulate cortex initiate corpus callosum (CC) development, yet nothing is known about the molecules that regulate their guidance. We demonstrate that neuropilin 1 (Npn1) plays an integral role in the development of the CC. Npn1 is localized to axons of cingulate neurons as they cross the midline, and multiple class 3 semaphorins (Sema
Oxford University Press.
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32. Use of the fluorescent probe 1-N-phenylnaphthylamine to study the interactions of aminoglycoside antibiotics with the outer membrane of Pseudomonas aeruginosa.
The mode of interaction of the polycationic aminoglycoside antibiotics with the surface of Pseudomonas aeruginosa cells was studied with the hydrophobic fluorescent probe 1-N-phenylnaphthylamine (NPN). The addition of the aminoglycoside gentamicin to intact cells in the presence of NPN led to a shift in the fluorescence emission maximum from 460 to 420 nm. A
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33. Variants of N-tropic leukemia virus derived from BALB/c mice.
Clonal lines derived from cultures of NIH/3T3 cells infected with N-tropic leukemia virus from BALB/c mice differ in the amount and type of N-tropic virus they produce. Three biologically distinguishable N-tropic viruses were found: the large XC plaque-forming virus of hartley et al. (1969) (LP-N), A SMALL XC plaque-forming virus (sp-n), and a non-plaque-for
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34. Outer membrane differences between pathogenic and environmental Yersinia enterocolitica biogroups probed with hydrophobic permeants and polycationic peptides.
Sensitivities to polycationic peptides and EDTA were compared in Yersinia enterocolitica pathogenic and environmental biogroups. As shown by changes in permeability to the fluorescent hydrophobic probe N-phenylnaphthylamine (NPN), the outer membranes (OMs) of pathogenic and environmental strains grown at 26 degrees C in standard broth were more resistant to
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35. Interaction of macrophage cationic proteins with the outer membrane of Pseudomonas aeruginosa.
The interaction of the polycationic rabbit alveolar macrophage cationic proteins MCP-1 and MCP-2 (or their identical neutrophil equivalents NP-1 and NP-2) with the surface of Pseudomonas aeruginosa was investigated. Both proteins bound avidly to purified lipopolysaccharide, as judged by their ability to competitively displace the probe dansyl polymyxin with
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36. Construction and characterization of a single-chain catalytic antibody.
The antigen-binding (Fab) fragment of the catalytic monoclonal antibody NPN43C9 has recently been cloned by using bacteriophage lambda. By inserting the variable regions of this Fab coding sequence into a (NH2)-VL-linker-VH-(COOH) construct (where VL and VH represent the heavy and light chain variable regions), we have assembled a recombinant gene encoding a