Lead Acetate
Mostrando 13-24 de 128 artigos, teses e dissertações.
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13. Ovary maturatıon stages and histological investigation of ovary of the Zebrafish (Danio rerio)
Microscopic ovary features of Zebrafish were analyzed. Samples were fixed in Bouin’s solution, mounted in parafin and cut into 6-7 µm-thick slices which were stained with Hematoxylin and Eosin (HE), methylene blue and using Periodic-acid Schiff method (PAS). The thin sections in ultramicrotome with the thickness of approximately 0,5 - 0,7 µm were examine
Brazilian Archives of Biology and Technology. Publicado em: 2008-06
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14. Study of nuclear texture of Wistar rats after lead poisonig / Estudo da textura nuclear em ratos Wistar intoxicados por chumbo
Lead (Pb) is one of the most important naturally occurring and ubiquitous heavy metals, with toxic effects after acute or chronic exposure on liver, the nervous system, hematopoesis, and, especially the kidneys. The aim was to study the time course of the renal tubular sodium handling during chronic experimental lead poisoning in rats comparing it with the m
Publicado em: 2008
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15. Hemoglobinopatias e anemias em gestantes no Hospital Universitário de Campo Grande, MS
The hemoglobinopathies are a group of inherited diseases that are highly variable in clinic diagnosis, from forms that are incompatible with life to asymptomatic heterozygotes carriers, who under stress like pregnancy, may have the disease. The detection of heterozygote carriers is of great importance for public health as they constitute potential sources of
Publicado em: 2008
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16. Efeitos do chumbo sobre a atividade da tioredoxina redutase citosólica (TrxR1) e parâmetros de estresse oxidativo em rins de ratos. / Effects of lead acetate exposure on renal cytosolic thioredoxin reductase (TrxR1) activity and on indicators of lead exposure.
Lead is a heavy metal that accumulates primarily in kidney, where exerts its nephrotoxic effects. Several studies suggest that the oxidative stress is an important molecular mechanism for the toxic effects of lead in kidney and in other organs. Cytosolic thioredoxin reductase (TrxR1) is a selenoflavoprotein involved in many processes modulating intracellular
Publicado em: 2007
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17. Hormone therapy and breast density in women with premature ovarian failure / Terapia hormonal e densidade mamaria em mulheres com falencia ovariana prematura
Introuction: Premature ovarian failure (POF) may lead to serious consequences due to a prolonged low estrogen state and there is a precise indication for hormone replacement therapy to minimize such alterations. Studies have evaluated the impact of hormone therapy on the breasts of postmenopausal women, however the consequences of treatment on the breasts of
Publicado em: 2007
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18. AvaliaÃÃo fungitÃxica e caracterizaÃÃo quÃmica dos Ãleos essenciais e extratos obtidos apÃs diferentes processos de extraÃÃo de Cipà Vick (Tanaecium Nocturnum) e JoÃo Brandim (Piper Piscatorum) / Evaluation of fungitoxic activity and chemical characterization of the essential oils obtained after different processes of extraction of cipà vick (Tanaecium nocturnum) and joÃo-brandim (Piper piscatorum).
The chemical characterization by IR, GC-MS and GC-FID of essential oils and extracts obtained from Piper piscatorum and Tanaecium nocturnum, plant species native to the state of Acre, by different extraction processes and the evaluation of the toxicity to Aspergillus flavus were performed. The study involved four experiments. In the first, the efficiency of
Publicado em: 2007
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19. Avaliação dos efeitos do extrato de Chlorella vulgaris sobre a resposta imunologica do tipo celular em camundongos expostos ao chumbo e infectados com Listeria monocytogenes
In this work, we investigated the effects of Chlorella vulgaris extract (CVE) in lead-exposed and Listeria monocytogenes infected mice. Experiments were carried out in mice treated simultaneously with CVE and lead acetate for 10 days. At the end of this period, the animals were infected. The capacity of CVE to prevent the myelosuppression induced by lead was
Publicado em: 2005
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20. Sintese e caracterização de novas quinazolinas polissubstituidas
The objective of the present work was to synthesize new polisubstituted quinazolines from new aminocarboxylic acids. The first synthetic route, using 3,4-diidroxybenzoic acid and 4-methylcatechol, did not lead to satisfactory results. Therefore, a new route was proposed from 6-nitropiperonal, bearing a different protecting group - methylenedioxy. This new ro
Publicado em: 2004
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21. A determinação voltametrica multisequencial de Pb, Cd, Zn, e Cu em amostras complexas usando um sistema ternario homogeneo de solventes
Anodic Stripping Voltammetry (ASV) has been much used for the determination of lead, cadmium, zinc and copper in simple samples due to its low cost, simplicity and low detention limits. However, the application of the ASV in complex samples has been considered to have restrictions, due to the matrix effect, the overlapping of peaks and the formation of inter
Publicado em: 2004
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22. Avaliação e síntese de corantes fenotiazínicos para determinação espectrofotométrica de sulfeto e sulfito empregando sistemas de análise em fluxo.
In this work seven aromatic amines O e N-substituted were evaluated at optimized reaction conditions for symmetrics phenothiazinic dyes. DMPD, DEPD, PPD, PAP e PAA were the start reagent, where the yield for phenothiazinic dyes varying from 10% to 43% for different oxidizing (Fe3+ or ClO-), acids (H2SO4 or HBF4) and precipitant agent (ClO4 - or BF4 -). The l
Publicado em: 2004
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23. Estudos de Novas Metodologias Sintéticas para Heterocíclicos Quinolônicos, Triazólicos e Síntese de Catalisadores Quirais
In order to obtain quinolone nucleosides a new methodology based on construction of the heterocyclic ring at the carbohydrate moiety was devised. The carbohydrates: 1-methoxy-2,3-O-isopropylidene-α-D-ribofuranose (108), 1-methoxy-2,3-O-isopropylidene-5-O-methanesulfonyl-β-D-ribofuranose (109a) and 1-methoxy-2,3-O-isopropylidene-5-O-p-toluenesulfony
Publicado em: 2004
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24. Estudo comparativo entre observador de estado não-linear de alto ganho e calorimetria associada a redes neurais artificiais para previsão de composição de copolimeros produzidos em emulsão com altos teores solidos
High solid content lattices produced by emulsion polymerization have a great importance in the polymeric industry, not only for environmental reasons, since they usually have water as continuous phase, but also for economic motive, because these processes result in more polymeric material by volume of latex. The worry with the final application quality of th
Publicado em: 2003