Degree Modifiers
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Use of new silica fillers as additives for polymers used in packaging of fruit
The objective of this work was to synthesize nanosilicas with different degree of hydrophobicity by the sol-gel method, using tetraethyl orthosilicate as a precursor. For this purpose, 3-aminopropyl triethoxysilane (APS) and 1,1,1,3,3,3 - hexamethyldisilazane (HMDS), were added during synthesis as modifiers. A commercial biopolymer (Hexamoll Dinch, BASF) int
Quím. Nova. Publicado em: 2012
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2. The maximal degree effect: how todo modifies the predication / O efeito grau máximo sobre os domínios: como todomodifica a relação argumento-predicado
Esta tese investiga o modo de organização dos domínios nominal, verbal e dos adjetivos em Português do Brasil (PB), tendo como guia a aceitabilidade de sentenças com todo. Para o inglês, a natureza do parâmetro orienta a seleção de argumentos por operadores; já para o PB, o que importa é a oposição entre tipos de escala. O PB não tem determinan
Publicado em: 2009
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3. Estrutura de vidros fosfatos ternários no sistema Pb-Al metafosfato
In this work, the Pb-Al meta-phosphate glass system (1-x) Pb(PO3)2 xAl(PO3)3 was studied, with the aim of determining the structural effects induced in the glass network by the substitution of Pb by Al. In the series of glasses encompassing the range 0 ≤ x ≤ 1 the composition meta [O/P] = 3 was maintained. In this way, the resulting phosphate net
Publicado em: 2008
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4. Funcionalização do copolímero em bloco estireno-butadieno-estireno (SBS) e sua utilização em misturas com nylon 6
In this work chemical modification of styrene-butadiene-styrene copolymer with glycidyl methacrylate was carried out in an internal mixer through radical reactions. Dicumyl peroxide was used as initiator. Grafting reactions with maleic anhydride were also performed. During reactions torque was monitored continuously. Reactions products were characterized by
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2000
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5. Genetic Modifiers of the Phenotypic Level of Deoxyribonucleic Acid-Conferred Novobiocin Resistance in Haemophilus
Leidy, Grace (Columbia University, New York, N.Y.), Iris Jaffee, and Hattie E. Alexander. Genetic modifiers of the phenotypic level of deoxyribonucleic acid-conferred novobiocin resistance in Haemophilus. J. Bacteriol. 92:1464–1468. 1966.—An apparent increase in novobiocin resistance in Haemophilus aegyptius after a second exposure to a particular H. inf
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6. Noncovalent Modification of Deoxyhemoglobin S Solubility and Erythrocyte Sickling
Ammonium sulfate, as well as potassium phosphate, can be used to measure solubility differences between hemoglobin S and hemoglobin A. In addation, the solubility of deoxyhemoglobin CHarlem in 1.96 M phosphate has a markedly different temperature dependence from that of deoxyhemoglobin S. This observation indicates that the solubility measurement is quite se
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7. Genetic Dissection of Segregation Distortion. I. Suicide Combinations of SD Genes
Two major loci in the Tft–cn region of an SD chromosome have been separated by recombination and identified. The allele at the left-hand locus on an SD chromosome is called Sd; the allele at the right-hand locus is called Rsp. Both Sd and Rsp are necessary to bring about a distortion of the segregation ratio in heterozygous SD males, although the particula
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8. Pseudocomplementary PNAs as selective modifiers of protein activity on duplex DNA: the case of type IIs restriction enzymes
This study evaluates the potential of pseudocomplementary peptide nucleic acids (pcPNAs) for sequence-specific modification of enzyme activity towards double-stranded DNA (dsDNA). To this end, we analyze the ability of pcPNA–dsDNA complexes to site-selectively interfere with the action of four type IIs restriction enzymes. We have found that pcPNA–dsDNA
Oxford University Press.
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9. Cytogenetic Analysis of an SD Chromosome from a Natural Population of DROSOPHILA MELANOGASTER
The discovery and the cytogenetic characterization of a new SD (Segregation Distorter) chromosome 2 from a natural population in Ranna (Sicily, Italy), SDRa, are reported. The main features of this chromosome are as follows: (a) it contains an SdRa gene with a moderate degree of segregation distortion (k = 0.72), (b) a recessive female sterile gene, fs(2)TLM
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10. Lead inhibition of enzyme synthesis in soil.
Addition of 2 mg of Pb2+/g of soil concident with or after amendment with starch or maltose resulted in 75 and 50% decreases in net synthesis of amylase and alpha-glucosidase, respectively. Invertase synthesis in sucrose-amended soil was transiently reduced after Pb2+ addition. Amylase activity was several times less sensitive to Pb2+ inhibition than was enz
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11. The threshold for polyglutamine-expansion protein aggregation and cellular toxicity is dynamic and influenced by aging in Caenorhabditis elegans
Studies of the mutant gene in Huntington's disease, and for eight related neurodegenerative disorders, have identified polyglutamine (polyQ) expansions as a basis for cellular toxicity. This finding has led to a disease hypothesis that protein aggregation and cellular dysfunction can occur at a threshold of approximately 40 glutamine residues. Here, we test
National Academy of Sciences.
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12. Quantitative trait loci controlling halothane sensitivity in Caenorhabditis elegans
Genetic analysis is an essential tool for defining the molecular mechanisms whereby volatile anesthetics (VA) disrupt nervous system function. However, the degree of natural variation of the genetic determinants of VA sensitivity has not been determined nor have mutagenesis approaches been very successful at isolating significantly resistant mutant strains.
The National Academy of Sciences of the USA.