Secondary Bonds
Mostrando 1-12 de 103 artigos, teses e dissertações.
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1. Identification, expression and characterization of the recombinant Sol g 4.1 protein from the venom of the tropical fire ant Solenopsis geminata
Abstract Background: Fire ant venom is a complex mixture consisting of basic piperidine alkaloids, various biologically active peptides and protein components, including a variety of major allergenic proteins. Tropical fire ant Solenopsis geminata is an important stinging ant species that causes anaphylaxis and serious medical problems. Although the biologi
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 21/09/2018
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2. APPLICATION OF NANOFLUIDS IN SECONDARY REFRIGERATION SYSTEMS / APLICAÇÃO DE NANOFLUIDOS EM SISTEMAS SECUNDÁRIOS DE REFRIGERAÇÃO
The application of nanofluids as secondary fluids in vapor compression refrigeration systems is studied with the development of a lumped-parameter thermodynamic model. When a nanofluid is used as a heat transfer fluid, its thermal conductivity and viscosity increase, when compared with the corresponding properties of the base fluid. The irreversibilities due
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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3. Síntese, Reatividade e Caracterização Estrutural de Haletos de Telúrio e Ariltelurenila com Estados de Oxidação Incomuns ou Mistos. / Synthesis, Reactivity and Structural Characterization of Tellurium and Aryltellurenyl Halides with Unusual or Mixed Oxidation States.
This work presents a study related to the halogenation of diarylditellurides (RTe)2 in order to obtain tellurium and aryltellurenyl halides with unusual or mixed oxidation states. Although regarded as essentially unstable, the aryltellurenyl monohalides (RTeX) were generated in situ and captured from the reaction milieu in many ways, forming stable adducts o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Heteropentámeros (etanol)4-agua: estudio estructural y termodinámico
Stochastic exploration of the potential energy surface of (ethanol)4-water heteropentamers through simulated annealing calculations was used to find probable structures of these clusters. Subsequent geometry optimization with the B3LYP/6-31+G(d) approach of these initial structures led to 13 stable heteropentamers. The strength of the hydrogen bonds of the t
Química Nova. Publicado em: 2010
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5. Evaluation of supramolecularity of triazenide complexes mononuclear and binuclear of Ag(I) / Avaliação da Supramolecularidade de complexos triazenidos mononucleares e binucleares de Ag(I)
This work presents the synthesis and the investigation of the crystalline and molecular structure of five new mononuclear or binuclear complexes of Ag(I) with monocatenated triazenido ligands. The mononuclear complexes were synthesized from the binucleares complexes. With the addition stoichiometric of the ligand triphenylphosphine occurs the split of the bi
Publicado em: 2009
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6. Processo decisório estratégico na empresa industrial de pequeno porte (EIPP): um estudo de caso / Strategical decision process in the small manufacture firm (SMF): a case study
In uncertainty situations, the role of decision maker is the most important amongst the roles played by the administrator. The managers, specially in small companies, need to immediately distinguish clearly the strategical questions from ordinary ones. The focus of the present research is the study of the strategical decision processes of the managers of the
Publicado em: 2009
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7. MOLECULAR CHARACTERIZATION OF BIOPOLIMERS IN SOLUTION BY COMPUTATIONAL SIMULATION / Caracterização molecular de biopolímeros em solução utilizando simulação computacional
Computer simulation methods were used to characterize the structure and molecular properties of natural and synthetic biopolymers in aqueous solution. The polysaccharides chitin and chitosan, and aliphatic polypeptides were studied. The interest on the chitin and chitosan biopolymers is because of their biodegradability, biocompatibility and potential use as
Publicado em: 2009
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8. Study of the crystal structure of the high Tc superconductor Hg1-xRe xBa2Ca2Cu3O8+δ by using EXAFS, XANES and XRD
Hg based superconducting ceramics present the highest critical temperatures ever reported, particularly the phase 1223 with the highest Tc so far obtained -135 K. However, these compounds are obtained by a complex synthesis route and suffer degradation at ambient atmosphere. This disadvantage may be overcome by doping with an appropriate amount of Re. Sample
Materials Research. Publicado em: 2008-06
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9. A imagem do cheiro: o paradoxo na publicidade de perfume
The current research approaches the comunicative modality we name: olfactory communication. We understand the perfume as a media form. We have investigated the history of the perfume in several civilizations and its use in the rituals. We have inserted some discoveries regarding the smell in the communication of the human being since their early age. As the
Publicado em: 2008
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10. ANÁLISE ESTRUTURAL DE COMPLEXOS CONTENDO Te(IV) NAS FORMAS ANIÔNICA E CATIÔNICA / STRUCTURAL ANALYSIS OF COMPLEXES CONTAINING Te(IV) IN BOTH CATIONIC AND ANIONIC SPECIES
Este trabalho apresenta a síntese e o estudo cristaloquímico detalhado de uma série de sais complexos de telúrio(IV), de fórmulas gerais [R3Te][PhTeX4] e [R3Te]2[TeX6], nos quais átomos de telúrio(IV) estão presentes tanto no cátion como no ânion, com R= fenila ou metila, e X = Cl, Br ou I. O ditelureto de difenila, (PhTe)2, foi utilizado como reag
Publicado em: 2007
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11. Synthesis and crystal structures of new complex salts containing both cationic and anionic tellurium(IV) species: the role of secondary bonds in the arrangement of tellurium based tectons
Neste trabalho divulgamos a síntese e a estrutura cristalina de uma série de três novos complexos de telúrio(IV), [Te(C6H5)(CH3)2]][TeX 4(C6H5 )], X = Cl (1), Br (2) ou I (3). Nesses complexos, as ligações secundárias promovem diferentes arranjos estruturais, mostrando o caráter tectônico das espécies de telúrio. Em 1 e 2, a interação Te···X
Journal of the Brazilian Chemical Society. Publicado em: 2006-12
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12. Síntese e Análise Estrutural de Novos Dihaloorganoteluratos(II) Monoaniônicos. / Synthesis and structural analysis of new monoanionic dihaloorganyltellurates(II).
In this dissertation the synthesis and structural characterization of the new series of monoanionic dihaloorganyltellurates(II) compounds with a general formula (C5H6N)[mesTeX2] is presented. Dimesitylditelluride (mesTe)2 reacts with resublimed iodine in toluene and then with (C5H6N)+X- (X = I, Br e Cl), to give the compounds: (C5H6N)[mesTeI2] (1), (C5H6N)[m
Publicado em: 2006