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Id: biblio-1292117
Autor: Bijowski, Kamil; Dabrowska, Zofia; Zagajewski, Mariusz; Onopiuk, Barbara; Dabrowska, Ewa.
Título: Effect of selected metals on bone tissue of the masticatory apparatus / Efectos de metales en el tejido óseo del aparato masticatorio
Fonte: Actual. osteol;17(1):[35-44], 2021.
Idioma: en.
Resumo: The masticatory apparatus is a functional unit of the human body, which is mainly responsible for speech, chewing, and swallowing. It is built of bones, joints, ligaments, teeth, and muscles. In addition, the oral cavity and its hard tissues are the first ones to be exposed to exogenous factors during feeding and breathing. The aim of the work was to review the literature of recent years on the toxicology of metals and their possible negative and sometimes positive effects on the metabolism of bones of the masticatory apparatus. In summary, metals commonly found in the environment affect the bones of the masticatory apparatus to varying degrees. Attention should be paid to the sources of individual metals in the environment and to prevent their excessive, unwanted effects on the bones of the masticatory apparatus. (AU)

El aparato masticatorio constituye una unidad funcional del cuerpo humano especializada en la regulación y coordinación de los procesos del habla, la masticación y la deglución. Está constituida por huesos, ligamentos, articulaciones, músculos y dientes. El tejido óseo de la cavidad bucal es el primero en estar expuesto a factores exógenos durante la alimentación y la respiración. El objetivo del presente trabajo es realizar una revisión de lo reportado en la literatura en los últimos años, con respecto a los efectos beneficiosos o nocivos de los metales pesados sobre el metabolismo de los huesos del aparato masticatorio. En resumen, se evidencia que los metales presentes en el medioambiente afectan a estos huesos en diferentes grados. Se debe prestar especial atención a identificar las fuentes de donde provienen estos metales, para prevenir los efectos no deseados sobre el tejido óseo masticatorio generados por una excesiva exposición a ellos. (AU)
Descritores: Osso e Ossos/metabolismo
Sistema Estomatognático/metabolismo
Metais Pesados
Arcada Osseodentária/metabolismo
-Metais Pesados/toxicidade
Limites: Humanos
Tipo de Publ: Revisão
Responsável: AR2.1 - Biblioteca Central


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Id: biblio-1039124
Autor: Todirascu-Ciornea, Elena; Dumitru, Gabriela.
Título: Heavy Metals and 2, 4-Dinitrophenol Impact on Some Physiological and Biochemical Parameters in Capsicum Species
Fonte: Braz. arch. biol. technol;62:e19180115, 2019. graf.
Idioma: en.
Resumo: Abstract The accumulation of heavy metals and of pesticides in the soil have a negative impact on Capsicum chinense var. Aji Mochero and Capsicum baccatum var. pendulum Bishop's Crown species, the present work highlighting the exerted influence on the superoxid-dismutase activity, catalase and peroxidase - as enzymes implied in the removal of H2O2, of O2- radical and of ion HO- that have devastating effects on the vegetable cell, on the Krebs cycle's dehydrogenases - as main way to produce energy, respectively of the chlorophyll a, b and carotenes - as photoassimilatory pigments, but also as biologic antioxidants.
Descritores: Capsicum
Estresse Oxidativo
Metais Pesados/química
Dinitrofenóis/química
Responsável: BR1.1 - BIREME


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Texto completo SciELO Brasil
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Id: biblio-1039127
Autor: Azevedo, Joaquim Alexandre Moreira; Barros, Alexandre Bomfim; Miranda, Paulo Rogério Barbosa de; Costa, João Gomes da; Nascimento, Velber Xavier.
Título: Biomonitoring of Heavy Metals (Fe, Zn, Cu, Mn, Cd and Cr) in Oysters: Crassostrea rhizophorae of Mangrove Areas of Alagoas (Brazil)
Fonte: Braz. arch. biol. technol;62:e19180211, 2019. tab, graf.
Idioma: en.
Resumo: Abstract Mangroves are tropical and subtropical flooded forests that generally develop in estuarine areas over unstable sediments protected from the action of waves in the intertidal zone with an environment characterized by a great diversity of fauna and flora. Thus, the present study aimed to evaluate the levels of heavy metals that are absorbed by mangrove oysters, in estuarine systems in the Alagoas coast by determining the concentrations of Fe, Cu, Mn, Zn, Cd and Cr. Two areas, which consisted of both a collection during the rainy season and the dry season, were selected for sampling of mangrove oysters. In each collection, seven samples were collected, at seven different points, where each sample contained four oysters. In the laboratory the oysters were dried at 105°C for 72 hours and then macerated. It was then digested with 10 ml of a solution comprising a combination of 4:1 nitric acid and hydrochloric acid, initially in 1h at 40°C, followed by 3 hours at 140°C. In General, the medians followed the order Zn > Fe > Mn > Cu > Cr > Cd in MMELC and Zn > Cu > Fe > Mn > Cr > Cd in Meirim River. It is concluded that the Crassostrea rhizophorae oysters from the studied environments presented concentrations of all the metals proposed in the research and demonstrates its accumulating and bioindicator character.
Descritores: Ostreidae
Metais Pesados/análise
Áreas Alagadas
-Brasil
Responsável: BR1.1 - BIREME


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Id: biblio-1055399
Autor: LEBLEBİCİ, Zeliha; DALMIŞ, Esra; ANDEDEN, Enver Ersoy.
Título: Determination of the potential of Pistia stratiotes L. in removing nickel from the environment by utilizing its rhizofiltration capacity
Fonte: Braz. arch. biol. technol;62:e19180487, 2019. tab, graf.
Idioma: en.
Projeto: Nevsehir Hacı Bektaş Veli University Research Fund.
Resumo: Abstract: The aim of this study is to explain the biological response and rhizofiltration capacity of Pistia stratiotes, which is an aquatic macrophyte, in alleviating heavy metal stress. In our study, Pistia species were exposed to Nickel (Ni) at different concentrations over seven days. The potential of the aquatic macrophytes in accumulating heavy metals in the water and in removing them from the environment was evaluated by determining the bio-concentration factors (BCF). Selected biological parameters in the leaves of Pistia stratiotes, including metal accumulation, photosynthetic pigment amount, lipid peroxidation activity, and growth rates were measured at the end of the seven-day period. The highest amount of Ni accumulation in P. stratiotes occurred at a concentration of 20 mg l-1. The amount of chlorophyll a (chl a) in P. stratiotes reached a value of 0.087 mg g-1 at the Ni concentration of 20 mg l-1. The relative growth rate (RGR) of P. stratiotes showed a negative correlation with the increases in the concentration levels of the metal. Malondialdehyde (MDA) levels increased to 8.214 nmol/g at the concentration of 20 mg l-1, depending on Ni concentration and time. In our study, the use of P. stratiotes has been determined to be an appropriate plant as an effective Ni accumulator to be utilized with the purpose of rhizofiltration.
Descritores: Biodegradação Ambiental
Metais Pesados
Araceae
Bioacumulação
Responsável: BR1.1 - BIREME


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Id: biblio-1051261
Autor: Massoud, Ramona; Hadiani, Mohammad Rasoul; Hamzehlou, Pegah; Khosravi-Darani, Kianoush.
Título: Bioremediation of heavy metals in food industry: application of Saccharomyces cerevisiae
Fonte: Electron. j. biotechnol;37:56-60, Jan. 2019. tab.
Idioma: en.
Projeto: Shahid Beheshti University of Medical Sciences.
Resumo: Heavy metals are natural elements in the Earth's crust that can enter human food through industrial or agricultural processing, in the form of fertilizers and pesticides. These elements are not biodegradable. Some heavy metals are known as pollutants and are toxic, and their bioaccumulation in plant and animal tissues can cause undesirable effects for humans; therefore, their amount in water and food should always be under control. The aim of this study is to investigate the conditions for the bioremediation of heavy metals in foods. Various physical, chemical, and biological methods have been used to reduce the heavy metal content in the environment. During the last decades, bioremediation methods using plants and microorganisms have created interest to researchers for their advantages such as being more specific and environmentally friendly. The main pollutant elements in foods and beverages are lead, cadmium, arsenic, and mercury, which have their own permissible limits. Among the microorganisms that are capable of bioremediation of heavy metals, Saccharomyces cerevisiae is an interesting choice for its special characteristics and being safe for humans, which make it quite common and useful in the food industry. Its mass production as the byproduct of the fermentation industry and the low cost of culture media are the other advantages. The ability of this yeast to remove an individual separated element has also been widely investigated. In countries with high heavy metal pollution in wheat, the use of S. cerevisiae is a native solution for overcoming the problem of solution. This article summarizes the main conditions for heavy metal absorption by S. cerevisiae.
Descritores: Saccharomyces cerevisiae/metabolismo
Biodegradação Ambiental
Indústria Alimentícia
Metais Pesados/metabolismo
-Arsênio
Leveduras
Cádmio
Remoção de Contaminantes
Absorção
Bioacumulação
Chumbo
Mercúrio
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1039578
Autor: Valenti, Vitor Engrácia; Garner, David M.
Título: Cardiovascular risks in subjects exposed to the Brumadinho dam collapse, Minas Gerais, Brazil
Fonte: Clinics;74:e1301, 2019.
Idioma: en.
Descritores: Doenças Cardiovasculares/induzido quimicamente
Metais Pesados/toxicidade
Desastres
Colapso Estrutural
-Brasil
Fatores de Risco
Limites: Humanos
Responsável: BR1.1 - BIREME


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Id: biblio-1093005
Autor: García, Juan Daniel Díaz; Arceo, Emmanuel.
Título: Renal damage associated with heavy metals: review work / Daño renal asociado a metales pesados: trabajo de revisión
Fonte: Rev. colomb. nefrol. (En línea);5(1):45-53, Jan.-June 2018. tab, graf.
Idioma: en.
Resumo: Abstract Catheter-associated infection is an entity with multiple complications, a condition that alters the quality of life of all patients Chronic kidney disease (CKD) represents an important health problem in the entire global population, where knowledge of the environmental factors associated with this disease is currently essential for its prevention. Several heavy metals are recognized, including Cadmium (Cd), Lead (Pb), Arsenic (As) and Mercury (Hg), which are clearly associated with renal damage and progression of CKD. Studies in animals and humans primarily demonstrate a clear association between exposure to these metals and the presence of chronic renal damage, where the pathophysiology of each of these metals is important in understanding the mechanism of renal damage. The present review aims to analyze the pathophysiology and clinical manifestations of the nephrotoxicity associated with these metals, as well as the different studies in both humans and animals that have been performed.

Resumen La enfermedad renal crónica (ERC) representa un importante problema de salud en todo el globo. Actualmente, es esencial para su prevención el conocimiento de los factores ambientales asociados con la enfermedad. Se reconocen diversos metales pesados, entre los que destacan el cadmio (Cd), plomo (Pb), arsénico (As) y mercurio (Hg), que están claramente asociados con la lesión renal y la progresión de la ERC. Estudios en animales y humanos demuestran, principalmente, una clara asociación entre la exposición a estos metales y la presencia de daño renal crónico, donde la fisiopatologia de cada uno de ellos es importante para entender el mecanismo de daño renal. La presente revisión tiene como objetivo analizar, tanto la fisiopatología y manifestaciones clínicas de la nefrotoxicidad asociada a dichos metales, como los diferentes estudios que se han realizado en humanos y animales.
Descritores: Metais Pesados
Insuficiência Renal Crônica
-Arsênio
Cádmio
Necrose Tubular Aguda
Chumbo
Mercúrio
Metais
Limites: Humanos
Masculino
Feminino
Tipo de Publ: Revisão
Responsável: CO661.9


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Id: biblio-834322
Autor: Pérez-Sabino, Francisco; Valladares-Jovel, Balmore; Hernández, Elisandra; Oliva, Bessie; Del Cid, Marta; Jayes-Reyes, Pedro.
Título: Determinación de arsénico y mercurio en agua superficial del lago de Atitlán / Determination of arsenic and mercury levels in superfitial water of Atitlán lake
Fonte: Cienc. tecnol. salud;2(2):127-134, jul.-dic. 2015. ilus, tab.
Idioma: es.
Resumo: El lago de Atitlán, considerado uno de los lagos más bellos del mundo, tiene una superficie de 125.7 km2, una profundidad máxima de aproximadamente 350 m, y se encuentra en el departamento de Sololá, en el occidente de Guatemala. Desde 2009 se han observado floraciones extensivas de cianobacterias en el lago, reflejando la contaminación del agua en la cuenca. Se determinaron los niveles dearsénico (As) y mercurio (Hg) en agua superficial del lago de Atitlán, por espectrofotometría de absorción atómica (EAA), en cuatro muestreos realizados en marzo, mayo, agosto y octubre de 2014 en 14 sitios. Diez sitios se encuentran localizados en el lago, habiendo sido definidos en estudios anteriores con base en su cercanía a poblaciones asentadas en la orillas del lago. Dos sitios corresponden a los principales ríos tributarios, y los restantes dos sitios a la entrada y salida de la planta de tratamiento Los Cebollales, ubicada en Panajachel. Los niveles de As encontrados en el lago de Atitlán, tributarios y en la planta de tratamiento, fueron superiores a 20 μg/L. Los resultados indican que la contaminación del lago de Atitlán por As se debe principalmente a la geología de la cuenca, al localizarse en una zona volcánica. Los niveles cuantificables de As, son superiores al nivel máximo permitido para agua potable en la Norma de Agua Potable (NGO 29001:99) de la Comisión Guatemalteca de Normas (COGUANOR), por lo que el agua del lago de Atitlán no se considera apta para el consumo humano.

Lake Atitlan is considered one of the most beautiful lakes in the world. It has 125.7 km2 and 350 m maximum depth. It is located at the western province Sololá in the Guatemalan highlands. Since 2009 several cyanobacterial blooms have occurred at the lake, as consequence of the environmental degradation caused by water contamination into the basin. In this study pollution levels by arsenic (As) and mercury (Hg) in Lake Atitlan, were investigated in collaboration with the Authority for the Sustainable Management of Lake Atitlan and its Surroundings (AMSCLAE). Four samplings were conducted in March, May, August and October 2014, collecting samples of water at 14 sampling sites, including the Wastewater Treatment Plant located at Panajachel. As and Hg in water samples of Lake Atitlan were analyzed by atomic absorption spectrophotometry. Presence of arsenic above 20 μg/L was found in the water of Lake Atitlan, rivers and the wastewater treatment plant. The results indicate that contamination of Lake Atitlan regarding metals, is due majorly to the Basin geology located in a volcanic region. The levels of As are higher than recommended levels for drinking water in different regulations.
Descritores: Águas Residuárias
Espectrofotometria Atômica
Metais Pesados
Limites: Humanos
Masculino
Feminino
Responsável: GT49.1


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Id: lil-783583 LILACS-Express
Autor: Trujillo-González, Juan Manuel; Torres-Mora, Marco Aurelio.
Título: EVALUACIÓN DE METALES PESADOS ACUMULADOS EN POLVO VIAL EN TRES SECTORES DE LA CIUDAD DE VILLAVICENCIO, COLOMBIA / ASSESSMENT OF HEAVY METALS IN ACCUMULATED ROAD DUST IN THREE SECTORS OF THE CITY OF VILLAVICENCIO, COLOMBIA
Fonte: Rev. luna azul;(41):296-308, jul.-dic. 2015. ilus, tab.
Idioma: es.
Resumo: La dinámica urbana derivada del crecimiento de las ciudades y de la demanda de la población en términos de servicios de transporte, de producción de alimentos, de bienes y servicios en general, son algunos de los responsables de la generación de factores contaminantes, donde uno de ellos es la presencia de metales pesados por acumulación en el polvo vial. En este sentido, el presente estudio tiene como finalidad evaluar la contaminación por presencia de metales pesados (Pb, Zn, Ni, Cu, Cr, y Cd) en el polvo de las vías de tres zonas de la ciudad de Villavicencio -Meta- (sector Anillo vial, sector Buque y sector Porvenir). Entre los resultados encontrados se tiene que la abundancia de metales por sector fue: sector Porvenir (SP), seguido del sector Anillo vial (SA) y sector Buque (SB). El estudio mostró que las concentraciones de metales pesados en el polvo vial están relacionadas con la dinámica de cada uno de ellos.

Urban dynamics derived from city growth and the population demands for transportation, food production, goods and services in general, are among the responsible on the generation of contaminating factors, where one of them is the presence of heavy metals in accumulated road dust. In this sense, the current study seeks to evaluate the pollution by presence of heavy metals (Pb, Zn, Ni, Cu, Cr, and Cd) in road dust from three sectors on Villavicencio -Meta- (sector Anillo vial sector, Buque sector and Porvenir sector). Among the obtained results, the metals abundance for each sector was as follows: Porvenir (SP), followed by sector Anillo vial (SA) and Buque (SB). The study showed that concentrations of heavy metals in road dust are related to the dynamics of each of these sectors.
Descritores: Metais Pesados
-Sedimentos
Poluição Ambiental
Chumbo
Limites: Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO54.1 - Centro de Biblioteca e Información Científica


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Id: biblio-1223499
Autor: García Barrera, Alma Verónica(edt).
Título: Elaboración de una biorresina intercambiadora de cationes a partir de cáscara de plátano o guineo para eliminar metales pesados en agua contaminada / Preparation of a cation exchanger bioresin start from banana peel or guineo to remove heavy metals in polluted water.
Fonte: Santa Tecla, La Libertad; ITCA Editores; ene. 2016. 52 p. ilus., tab..
Idioma: es.
Resumo: Esta investigación tuvo por objetivo obtener una bio-resina intercambiadora de cationes utilizando cáscaras de guineo o plátano, la cual reduzca la concentración de metales pesados en agua contaminada. A esta bio-resina se le realizaron pruebas fisicoquímicas: densidad seca aparente, pH y solubilidad en agua y solventes orgánicos. Se evaluó su efectividad filtrando agua contaminada con metales pesados, tales como hierro, cromo y níquel (Fe3+, Cr6+ y Ni2+), variando las condiciones de tiempo de contacto, temperatura y el tipo de cáscara. La cuantificación de la concentración de los metales en el agua filtrada se llevó a cabo por espectrofotometría visible. Se llegó a la conclusión que la bio-resina obtenida es efectiva para disminuir la concentración de metales pesados en agua, teniendo especial afinidad química por el cromo hexavalente; metal pesado que logró remover arriba del 90%. Las condiciones óptimas de operación de la bio-resina son a 30°C y 90 minutos de tiempo de contacto con la muestra. Además, las pruebas fisicoquímicas, permitieron tipificarla preliminarmente como una resina de intercambio catiónico débil con un grado de entrecruzamiento bajo.

This research aimed to obtain a cation exchange bio-resin, using plantain or banana peels, that reduces the concentration of heavy metals in contaminated water. The bio-resin underwent physico-chemical tests like apparent dry density, pH, solubility in water and organic solvents. Its effectiveness was tested by filtering contaminated water with heavy metals such as iron, chromium and nickel (Fe3+, Cr6+ y Ni2+) and by varying contact time conditions, temperature and type of peel. The measure of concentration of metals in filtered water was taken through visible spectrophotometry. We concluded that the resulting bio-resin is effective in reducing the concentration of heavy metals in water, showing special chemical affinity with hexavalent chromium, a heavy metal that was able to remove above 90%. The bio-resin optimum working conditions are 30°C and 90 minutes of contact with the sample. Also, the physico-chemical tests allowed to preliminary typify it as a weak cation exchange resin with a low degree of crosslinking.
Descritores: Resinas Vegetais/química
Cátions
Purificação da Água/métodos
-Espectrofotometria
Poluição Química da Água/prevenção & controle
Água
Metais Pesados
Concentração de Íons de Hidrogênio
Tipo de Publ: Relatório Técnico
Estudo de Validação
Responsável: SV2 - Departamento de Gobernanza y Gestión del Conocimiento
SV39.1; 547.8434, G216e



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