Mercury Ii
Mostrando 25-36 de 128 artigos, teses e dissertações.
-
25. "Royal" pediculosis in Renaissance Italy: lice in the mummy of the King of Naples Ferdinand II of Aragon (1467-1496)
Pediculosis seems to have afflicted humans since the most ancient times and lice have been found in several ancient human remains. Examination of the head hair and pubic hair of the artificial mummy of Ferdinand II of Aragon (1467-1496), King of Naples, revealed a double infestation with two different species of lice, Pediculus capitis, the head louse, and P
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-07
-
26. Highly selective transport of mercury(II) ion through a bulk liquid membrane
In this work carrier-facilitated transport of mercury(II) against its concentration gradient from aqueous 0.04 M hydrochloric acid solution across a liquid membrane containing isopropyl 2-[(isopropoxycarbothiolyl)disulfanyl]ethane thioate (IIDE) as the mobile carrier in chloroform has been investigated. Sodium thiocyanate solution (1.6 M) was the most effici
Química Nova. Publicado em: 2009
-
27. Protocol of assessment for species toxity mercury in natural water / Protocolo de avaliação do mercurio potencialmente toxico em aguas naturais
A protocol for the assessment of potentially toxic mercury in natural waters has been developed in accordance to the following stages: (i) research for a selective reductant of potentially toxic mercury species present in natural water samples; (ii) method optimization; (iii) experimental calibration carried out with solutions containing 50 mg L of Hg and di
Publicado em: 2009
-
28. Ultramicroeletrodo de irídio com filme de mercúrio eletrodepositado para medidas in situ de íons metálicos e pesticidas em solos e águas naturais / Iridium based ultramicroelectrodes with an electro-platted mercury film for in situ determination of metallic ions and pesticides in soil and natural waters
Neste trabalho foram desenvolvidas metodologias para a determinação de substâncias de interesse, como metais pesados (micronutrientes e contaminantes), macronutrientes e pesticidas em solo e águas naturais com ultramicroeletrodo de irídio recoberto com filme de Hg eletrodepositado (UME Ir-Hg) e técnicas voltamétricas, utilizando uma cápsula porosa de
Publicado em: 2009
-
29. Funcionalization of mesoporous silica with 2-bezothiazolethiol and 3-mercaptopropyltrimetoxysilane for electronalytical application / Funcionalização de sílicas mesoporosas com benzotiazol-2-tiol e 3-mercaptopropiltrimetoxisilano para aplicações em eletroanalítica
Mesoporous silicas were functionalised by immobilisation of organic substances covalently bonded to the silanol groups on the silica surface. SBA-15 nanostructured silica was functionalised by post-synthesis with 2-benzothiazolethiol and silica films modified with 3-mercaptopropyltrimethoxysilane were obtained by direct functionalisation. The characterizatio
Publicado em: 2009
-
30. Síntese e Caracterização de Novos Compostos de Difenilfosfinatos de chumbo(II) e mercúrio(I) e (II) / Synthesis and Characterization of New Compounds of Lead(II) and Mercury(I) and (II) Diphenylphosphinates
Neste trabalho foram sintetizados e caracterizados nove novos compostos de difenilfosfinatos de chumbo(II) e mercúrio(I) e (II), dentre eles quatro são compostos de chumbo(II) com ligantes difenilfosfinatos, hidroxo e água, obtidos em reações utilizando ácido difenilfosfínico, óxido de chumbo(II) e acetato de chumbo(II) em solventes metanol, etanol e
Publicado em: 2009
-
31. Treatment of wastewater containing chlorophenols by photo-Fenton advanced oxidation process. / Tratamento de efluentes aquosos contendo clorofenóis por meio de processo oxidativo avançado foto-Fenton.
In recent years, advanced oxidation processes (AOP) have emerged as potentially powerful methods to transforming organic pollutants into harmless substances. The present work aims to study the degradation of chlorophenols (2,4-dichlorophenol and pentachlorophenol) in aqueous solution by the photo-Fenton process. The experiments were conducted in a batch recy
Publicado em: 2009
-
32. Tree rings characterization and dendrocrhronology of Grevillea robusta A. Cunn, Hoven dulcis Thunb., Persea americana Mill., Tabebuia pentaphylla Hemsl. and Terminalia catappa L. trees at Piracicaba and Paulinia cities, São Paulo State / Caracterização dos anéis de crescimento e dendrocronologia de árvores de Grevillea robusta A.Cunn, Hovenia dulcis Thunb., Persea americana Mill., Tabebuia pentaphylla Hemsl. e Terminalia catappa L. nos municípios de Piracicaba e Paulinia, SP
Árvores de espécies exóticas foram plantadas em espaços urbanos e rurais, constituindo parte da paisagem e da cobertura vegetal das cidades brasileiras. As árvores de inúmeras dessas espécies apresentam fenologia característica e atividade cambial sazonal, formando anéis de crescimento anuais, que têm ampla aplicação na silvicultura, como indicad
Publicado em: 2009
-
33. Determinação de Sn(II) por polarografia: aplicação no controle de qualidade de reagentes liofilizados para radiodiagnóstico / Polarographic determination of Sn(II): application in the quality control of radiopharmaceutical reagents
Stannous chloride (SnCl2.2H2O) is the major compound used for reduction of generator-derived 99mTc-pertechnetate in cold kits for on site preparation of 99mTc-radiopharmaceuticals. These cold kits usually contain a ligand, stannous chloride, and different additives. Various techniques were described for tin determination, but they cannot distinguish between
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2008
-
34. Competitive adsorption of copper and mercury ions on natural and crosslinked chitosan membranes / Adsorção competitiva dos ions cobre e mercurio em membranas de quitosana natural e reticulada
Recent investigations have described chitosan, a linear polysaccharide obtained from deacetylation of chitin, as a suitable biopolymer to remove heavy metal ions from wastewater, since the amino and hydroxyl groups present in its structure can act as chelating sites. Several methods have been used to modify natural chitosan, such as crosslinking with glutara
Publicado em: 2008
-
35. Estudo eletrofisiológico e psicofísico em indivíduos intoxicados por vapor de mercúrio / Electrophysiological and psychophysical study of mercury vapor intoxicated subjects
Purpose. To analyse visual field sensitivity in a group of workers retired from thefluorescent lamp industry diagnosed with chronic occupational metallic mercurialism using psychophysical tests such as automated perimetry and measuring the retina cellselectrical responses with the multifocal electroretinogram. Methods. The psychophysical evaluation of the vi
Publicado em: 2008
-
36. NOVAS ABORDAGENS ANALÍTICAS PARA A DETERMINAÇÃO DE CICLOFENIL POR FLUORIMETRIA APÓS DERIVAÇÃO FOTOQUÍMICA E PARA AS DETERMINAÇÕES VOLTAMÉTRICAS DE ESTROBILURINAS UTILIZANDO O ELETRODO DE MERCÚRIO E DE CD (II), CU (II) E PB (II) UTILIZANDO O ELETRODO DE FILME DE BISMUTO / NEW ANALYTICAL APPROACHES FOR SPECTROFLUORIMETRIC DETERMINATION OF CYCLOFENIL AFTER PHOTOCHEMISTRY DERIVATION AND FOR STROBILURIN VOLTAMMETRIC DETERMINATION USING MERCURY ELECTRODE AND CU (II) VOLTAMMETRIC DETERMINATION USING BISMUTH FILM ELECTRODE
In this work, analytical approaches for the selective determinations of cyclofenil, stroblilurins (azoxystrobin and dimoxystrobin) and Cu (II) have been developed. The determination of cyclofenil was made by taking advantage of their fluorescent photoderivative. In order to achieve maximum fluorescence (250/410), the best conditions for derivatization and fo
Publicado em: 2008