Electrostatic Bonding
Mostrando 1-12 de 55 artigos, teses e dissertações.
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1. Polyacrylamides as co-depressant in hematite and quartz microflotation
Abstract In the present study, microflotation experiments were performed on pure minerals systems involving hematite and quartz in the presence of etherdiamine as collector. The influence of polyacrylamides as co-depressant was investigated in a blend with starch depressant. The results obtained demonstrated that all the polyacrylamides used were efficient i
REM, Int. Eng. J.. Publicado em: 2021-09
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2. Multiple Spectroscopic and Theoretical Approaches to Study the Interaction between HSA and the Antiparasitic Drugs: Benznidazole, Metronidazole, Nifurtimox and Megazol
The interaction between four antiparasitic drugs (benznidazole (BZL), metronidazole (MTZ), nifurtimox (NFX) and megazol (MZ)) with human serum albumin (HSA), the main vehicle of biodistribution of xenobiotics, hydrophobic, small and endogenous molecules in the bloodstream, was evaluated by multiple spectroscopic techniques and theoretical calculations. In al
J. Braz. Chem. Soc.. Publicado em: 2018-07
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3. Planejamento de inibidores baseado em fragmentos moleculares para a enzima gliceraldeído-3-fosfato desidrogenase de Trypanosoma cruzi / Design of inhibitors through fragment-based drug discovery for the enzyme glyceraldehyde-3-phosphate dehydrogenase from Trypanosoma cruzi
Chagas disease is a parasitic illness endemic in Latin America caused by the trypanosomatid parasite Trypanosoma cruzi that spreads around the world due to people migration. Nowadays, Benznidazole and Nifurtimox (banned in Brazil), are used for the treatment of this disease but causes severe side effects to patients. Recently, three new molecules have reache
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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4. 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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5. SÍNTESE, ESTUDOS ESPECTROSCÓPICOS E ESTRUTURAIS DE COMPLEXOS CONTENDO O LIGANTE 4,4- BIPIRIDINA, O ÂNION BARBITURATO E OS ÍONS METÁLICOS DA PRIMEIRA SÉRIE DE TRANSIÇÃO (Fe2+, Co2+, Ni2+, Cu2+ e Zn2+)
This work describes the synthesis and characterization of five new transition metal complexes of general formula MB2Bipy.10H2O (where M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+, B is barbiturate anion and Bipy is 4,4-bipyridine) . Several physical and spectroscopical techniques were used to characterize the compounds, such as elemental analysis (CHN), thermal analy
Publicado em: 2009
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6. Simulação de transientes elétricos durante processos de solda anódica / Numerical simulation of oxide layer growth during anodic bonding
Este presente trabalho descreve um processo de discretização numérica da equação nãolinear do transporte iônico que rege a camada de depleção para o crescimento do óxido de silício durante a solda eletrostática (solda anódica) silício-vidro (Si-G) na ausência do transporte difusivo com evolução no tempo. A equação da continuidade é resolv
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/10/2006
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7. Numerical simulation of oxide layer growth during anodic bonding / Simulação de transientes elétricos durante processos de solda anódica
Este presente trabalho descreve um processo de discretização numérica da equação nãolinear do transporte iônico que rege a camada de depleção para o crescimento do óxido de silício durante a solda eletrostática (solda anódica) silício-vidro (Si-G) na ausência do transporte difusivo com evolução no tempo. A equação da continuidade é resolv
Publicado em: 2006
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8. Simulação de transientes elétricos durante processos de solda anódica / Numerical simulation of oxide layer growth during anodic bonding
Este presente trabalho descreve um processo de discretização numérica da equação nãolinear do transporte iônico que rege a camada de depleção para o crescimento do óxido de silício durante a solda eletrostática (solda anódica) silício-vidro (Si-G) na ausência do transporte difusivo com evolução no tempo. A equação da continuidade é resolv
Publicado em: 2006
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9. Espectroscopia de multicoincidencia aplicada ao estudo de moleculas
The main purpose of this thesis is to study selective photo-fragmentation processes of free molecules excited by synchrotron radiation using multi-coincidence spectros-copy. Below are summarized some original and important contributions of this work: 1) We show for the first time experimental evidences of ultrafast dissociation in water molecule after O1s ®
Publicado em: 2002
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10. Hydroxyl hydrogen conformations in trypsin determined by the neutron diffraction solvent difference map method: relative importance of steric and electrostatic factors in defining hydrogen-bonding geometries.
Neutron diffraction maps have been used to assign the rotor conformations of the hydroxyl hydrogens in trypsin. Knowledge of these conformations is used to assess the relative importance of steric and electrostatic effects in conferring the H-bonding geometries of these groups. A general finding was that most hydroxyl groups are rotationally ordered with the
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11. Recognition of a cognate RNA aptamer by neomycin B: quantitative evaluation of hydrogen bonding and electrostatic interactions
Aminoglycosides are an important class of antibiotic that selectively target RNA structural motifs. Recently we have demonstrated copper derivatives of aminoglycosides to be efficient cleavage agents for cognate RNA motifs. To fully develop their potential as pharmaceutical agents it is necessary to understand both the structural mechanisms used by aminoglyc
Oxford University Press.
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12. Comparative calorimetric studies on the dynamic conformation of plant 5S rRNA. I. Thermal unfolding pattern of lupin seeds and wheat germ 5S rRNAs, also in the presence of magnesium and sperminium cations.
An attempt has been made to correlate differential scanning calorimetry melting profiles of 5S rRNAs from lupin seeds (L.s.) and wheat germ (W.g.) with their structure. It is suggested that the observed differences in thermal unfolding are due to differences in RNA nucleotide sequence and as a consequence in higher order structures. Interesting effects induc