Heavy Metal
Mostrando 37-48 de 643 artigos, teses e dissertações.
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37. Mineral element and heavy metal (cadmium, lead and arsenic) levels of bee pollen in Turkey
Abstract In this study, mineral element and heavy metal levels in bee pollen produced in various regions of Turkey (20 samples) and imported bee pollen (4 samples), were determined using an Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) device. Mineral and heavy metal levels of bee pollens produced in Turkey were determined to be within t
Food Sci. Technol. Publicado em: 09/03/2017
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38. The effect of heavy metal contamination on the bacterial community structure at Jiaozhou Bay, China
Abstract In this study, determination of heavy metal parameters and microbiological characterization of marine sediments obtained from two heavily polluted sites and one low-grade contaminated reference station at Jiaozhou Bay in China were carried out. The microbial communities found in the sampled marine sediments were studied using PCR-DGGE (denaturing gr
Braz. J. Microbiol.. Publicado em: 2017-03
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39. The Effect of Humic Acid Substances on the Thyroid Function and Structure in Lead Poisoning
ABSTRACT Lead (Pb) is a heavy metal, which adversely affects thyroid gland function and structure. Due to its high molecular weight and abundant functional groups, humic acid substances (HAS) can form chelates with heavy metals. The experiment was conducted to evaluate the prophylactic effect of HAS on thyroid hormone levels and histopathological lesions of
Rev. Bras. Cienc. Avic.. Publicado em: 2016-12
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40. Comparing Methods for Extracting Heavy Metals from Histosols for Establishing Quality Reference Values
ABSTRACT The diversity of methods for heavy metal extraction from soils complicates comparison of results used by environmental agencies to establish quality reference values. The aim of this study was to evaluate three soil digestion methods regarding the solubilizing capacity of Ba, Cr, Cu, Fe, Mn, Ni, Pb and Zn, and to propose a standard method to establi
Rev. Bras. Ciênc. Solo. Publicado em: 03/11/2016
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41. Evaluation and enhancement of heavy metals bioremediation in aqueous solutions by Nocardiopsis sp. MORSY1948, and Nocardia sp. MORSY2014
ABSTRACT An analysis of wastewater samples collected from different industrial regions of Egypt demonstrated dangerously high levels of nickel (0.27-31.50 mg L-1), chromium (1.50-7.41 mg L-1) and zinc (1.91-9.74 mg L-1) in the effluents. Alarmingly, these heavy metals are among the most toxic knownones to humans and wildlife. Sixty-nine Actinomycete isolates
Braz. J. Microbiol.. Publicado em: 2016-09
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42. Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances
ABSTRACT Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effec
Rev. Bras. Ciênc. Solo. Publicado em: 30/06/2016
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43. Effect of Heavy Metals on Liver, Kidney, Gills and Muscles of Cyprinus carpio and Wallago attu inhabited in the Indus
ABSTRACT: The present study was aimed to evaluate the effect of heavy metals on an important tissue of two fish species Cyprinus carpio and Wallago attu, sampled from the Indus river, Mianwali District, Pakistan. The concentration of selected heavy metals Fe, Cr, Cu, and in gills, muscles, kidney and liver was compared with an International standard of food
Braz. arch. biol. technol.. Publicado em: 27/06/2016
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44. Modelling of Lead Migration from Electronic Waste to Mixtures of Kaolinite, Iron Oxides and Organic Matter
Improper disposal of electronic waste in the environment facilitates migration of heavy metals, especially lead, into the soil and can contribute to the bioavailability of this species. Based on a simplex-centroid mixture experimental design, small-scale tests were performed for incubation of printed circuit boards (PCBs) in mixtures containing organic matte
J. Braz. Chem. Soc.. Publicado em: 2016-05
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45. MATERIAIS VÍTREOS E LUZ: PARTE 1
2015 is the Year of Light, according to UNESCO. Chemistry has a close relationship with light and one of the materials that allows such synergy is glass. Depending on the chemical composition of the glass, it is possible to achieve technological applications for the whole range of wavelengths extending from the region of the microwave to gamma rays. This div
Quím. Nova. Publicado em: 2016-04
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46. Qualidade de voz no estilo de canto heavy metal
Resumo:Este artigo analisa a voz cantada em registros altos no estilo heavy metal com a utilização de um perfil de voz baseado na percepção (VPAS). Seu principal objetivo é fornecer um embasamento científico sobre um tema tratado subjetivamente pela literatura musical. Foram utilizados dois cantores profissionais e dois amadores na análise. Suas produ
Per musi. Publicado em: 2015-12
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47. Characterization of the core microbiota of the drainage and surrounding soil of a Brazilian copper mine
Abstract The core microbiota of a neutral mine drainage and the surrounding high heavy metal content soil at a Brazilian copper mine were characterized by 16S rDNA pyrosequencing. The core microbiota of the drainage was dominated by the generalist genus Meiothermus. The soil samples contained a more heterogeneous bacterial community, with the presence of bot
Genet. Mol. Biol.. Publicado em: 03/11/2015
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48. MEDIDAS GLOBALMENTE CAÓTICAS DE VARIABILIDADE DE FREQUÊNCIA CARDÍACA DURANTE ESTÍMULO AUDITIVO AGUDO POR MÚSICA HEAVY METAL
OBJETIVO: A estimulação auditiva com música relaxante pode melhorar a regulação autonômica cardíaca em indivíduos tratados com um medicamento cardiotóxica. Avaliamos o efeito agudo de música heavy metal sobre a regulação autonômica cardíaca, por meio de novas técnicas de análise, ditas globalmente caóticas de espectrais altos: (a) high spec
MedicalExpress (São Paulo, online). Publicado em: 2015-10