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Id: lil-749482 LILACS-Express
Autor: Bolaño Ortiz, Tomás Rafael; Camargo Caicedo, Yiniva; Vélez-Pereira, Andrés Mauricio.
Título: Emisiones biogénicas de monoterpenos en el parque nacional natural Tayrona, santa marta (Colombia) / Monoterpenes ioggenic emissions in the tayrona natural park, santa marta (Colombia)
Fonte: Rev. luna azul;(40):102-116, ene.-jun. 2015. ilus, graf, tab.
Idioma: es.
Resumo: Los monoterpenos y otros compuestos orgánicos volátiles emitidos por la vegetación (emisiones biogénicas) juegan un papel significativo en la química troposférica por su participación en la formación de oxidantes fotoquímicos (p.e. ozono troposférico). Es así como la estimación de emisiones biogénicas resulta útil para establecer valores aproximados de la concentración, fundamental en la elaboración de programas de mejoramiento de calidad del aire. El objetivo del trabajo consistió en estimar las emisiones biogénicas de monoterpenos en el Parque Nacional Natural Tayrona, seleccionado por contar con áreas de vegetación autóctona de la región tropical con escasa o nula intervención antropogénica. Se aplicaron sensores remotos para la clasificación de cobertura vegetal, obteniendo la distribución espacial de la vegetación típica e identificando las familias de mayor dominancia. Las emisiones de monoterpenos se calcularon en 3,54 x 10(4) kg d-1, representadas 60% por la familia Leguminosae, 37,4% por la familia Euphorbiaceae, 2,4% por la familia Anacardiaceae y menos de 1% por las familias Rubiaceae y Polygonaceae. Durante las horas de sol en el área del parque (de las 6 a las 18 horas) se registraron las mayores temperaturas diarias y las más altas tasas de emisión de monoterpenos (59,6%); la cuarta parte de las emisiones ocurren entre las 10 y las 15 horas (24,2%), periodo en el que la radiación solar presenta máximos diarios y establece condiciones críticas para la formación de oxidantes fotoquímicos. La influencia de los vientos en la distribución espacio-temporal de las emisiones en el ambiente y la información de la rosa de vientos, evidencia que el 26% de las masas de aire proceden del N y el 15% del NE en el último trimestre del año, situación que podría favorecer la dispersión de monoterpenos a centros urbanos próximos al parque natural, pudiendo alterar la química atmosférica local con la formación de oxidantes fotoquímicos.

Monoterpenes and other volatile organic compounds emitted by vegetation (biogenic emissions) play a significant role in tropospheric chemistry because of their participation in the formation of photochemical oxidants (i.e. troposfheric ozone). This is how the estimation of biogenic emissions is useful for determining approximate values of monoterpenes concentration, which is essential in developing programs to improve air quality. The aim of this work was to estimate biogenic emissions of monoterpenes in the Tayrona National Park, that was selected because of the presence of native vegetation of the tropics with little or no human interference. Remote sensing was applied for classification of vegetation, coverage obtaining the spatial distribution of the typical vegetation and identifying the most dominant families. Monoterpenes emissions were estimated at 3.54 x 104 kg d-1, represented 60% of the Leguminosae family, 37.4% of the Euphorbiaceae family, 2.4% of the Anacardiaceae family and less than 1% of Rubiaceae and Polygonaceae families. During daylight hours in the park area (from 6:00 a.m. to 6:00 p.m.) the highest daily temperatures were registered and the highest emission rates of monoterpenes (59.6%); one fourth of the emissions occur between 10:00 a.m. and 3:00 p.m. (24.2%), period in which solar radiation presents daily maximums and establishes critical conditions for the formation of photochemical oxidants. The influence of winds on the spatial-temporal distribution of emissions shows that 26% of the air mass come from the N and 15% of NE in the last quarter of year, a situation that could favor the spread of monoterpenes to urban centers near the natural park, which could alter the local atmospheric chemistry with the formation of photochemical oxidants.
Descritores: Monoterpenos
-Oxidantes Fotoquímicos
Euphorbiaceae
Poluição do Ar
Limites: Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO54.1 - Centro de Biblioteca e Información Científica


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Id: biblio-827659
Autor: Ozturk, Omur; Tezcan, Aysu Hayriye; Adali, Yasemen; Yıldırım, Can Hakan; Aksoy, Ozgur; Yagmurdur, Hatice; Bilge, Ali.
Título: Effect of ozone and methylprednisolone treatment following crush type sciatic nerve injury
Fonte: Acta cir. bras;31(11):730-735, Nov. 2016. tab, graf.
Idioma: en.
Resumo: ABSTRACT PURPOSE: To assess and compare the histopathological effects of ozone therapy and/or methylprednisolone (MPS) treatment on regeneration after crush type sciatic nerve injury. METHODS: Forty Sprague-Dawley male rats were randomly allocated into four groups. Four groups received the following regimens intraperitoneally every day for 14 days after formation of crush type injury on sciatic nerve: Group I: ozone (20mcg/ml); Group II: methylprednisolone (2mg/kg); Group III: ozone (20 mcg/ml) and methylprednisolone (2mg/kg); Group IV: isotonic saline (0.9%). The histomorphological evaluation was made after biopsies were obtained from the sites of injury. RESULTS: Significant differences were noted between groups in terms of degeneration (p=0.019), nerve sheath cell atrophy (p=0.012), intraneural inflammatory cellular infiltration (p=0.002), perineural granulation tissue formation (p=0.019), perineural vascular proliferation (p=0.004), perineural inflammatory cellular infiltration (p<0.001) and inflammation in peripheral tissue (p=0.006). Degeneration was remarkably low in Group III, while no change in nerve sheath cell was noted in Group II. CONCLUSION: The combined use of methylprednisolone and ozone treatment can have beneficial effects for regeneration after crush type nerve injury.
Descritores: Oxidantes Fotoquímicos/uso terapêutico
Ozônio/uso terapêutico
Nervo Isquiático/lesões
Metilprednisolona/uso terapêutico
Traumatismos dos Nervos Periféricos/tratamento farmacológico
Regeneração Nervosa/efeitos dos fármacos
-Oxidantes Fotoquímicos/administração & dosagem
Ozônio/administração & dosagem
Nervo Isquiático/efeitos dos fármacos
Cicatrização/efeitos dos fármacos
Metilprednisolona/administração & dosagem
Distribuição Aleatória
Ratos Sprague-Dawley
Recuperação de Função Fisiológica/efeitos dos fármacos
Traumatismos dos Nervos Periféricos/fisiopatologia
Inflamação
Compressão Nervosa
Limites: Animais
Masculino
Ratos
Responsável: BR1.1 - BIREME


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Id: lil-781329
Autor: Aslaner, Arif; Çakır, Tuğrul; Tekeli, Seçkin Özgür; Avcı, Sema; Doğan, Uğur; Tekeli, Feyza; Soylu, Hakan; Akyüz, Cebrail; Koç, Süleyman; Üstünel, İsmail; Yılmaz, Necat.
Título: Medical ozone treatment ameliorates the acute distal colitis in rat
Fonte: Acta cir. bras;31(4):256-263, Apr. 2016. graf.
Idioma: en.
Resumo: PURPOSE: To investigate the effect of medical ozone treatment on the experimental acute distal colitis in rats. METHODS: Eighteen rats were randomly distributed into three equal groups; control, acute distal colitis (ADC) without and with medical ozone treatment. Rats in the control group were taken saline. ADC was performed by rectal way with 4% acetic acid in groups 2 and 3, and the group 3 was treated with medical ozone for three weeks both rectally and intraperitoneally. At the twenty second day the distal colons samples were obtained for malondialdehyde and myeloperoxidase, blood samples were obtained to measure the levels of TNF-α and IL-1β levels. Histolopatological examination was evaluated with Ki-67, IL-1β and VEGF immunostaining densities. RESULTS: There was significant increase in tissue MDA, MPO activity, TNF-α and IL-1β after ozone administration. There was also a significant difference at immunostaining densities of histopathological examination. CONCLUSIONS: Medical ozone treatment ameliorated the experimental acute distal colitis induced by acetic acid in rats. Its possible effect is by means of decreasing inflammation, edema, and affecting the proliferation and the vascularization.
Descritores: Oxidantes Fotoquímicos/uso terapêutico
Ozônio/uso terapêutico
Colite Ulcerativa/tratamento farmacológico
-Fatores de Tempo
Imuno-Histoquímica
Colite Ulcerativa/patologia
Distribuição Aleatória
Doença Aguda
Reprodutibilidade dos Testes
Fator de Necrose Tumoral alfa/sangue
Resultado do Tratamento
Ratos Wistar
Colo/patologia
Peroxidase/análise
Ácido Acético
Fator A de Crescimento do Endotélio Vascular/análise
Modelos Animais de Doenças
Interleucina-1beta/sangue
Malondialdeído/análise
Limites: Animais
Masculino
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-837687
Autor: Ozturk, Barcin; Kurtoglu, Tunay; Durmaz, Selim; Kozaci, Leyla Didem; Abacigil, Filiz; Ertugrul, Bulent; Erel, Ozcan.
Título: The effects of ozone on bacterial growth and thiol-disulphide homeostasis in vascular graft infection caused by MRSA in rats
Fonte: Acta cir. bras;32(3):219-228, Mar. 2017. tab, graf.
Idioma: en.
Projeto: Adnan Menderes University.
Resumo: Abstract: Purpose: To investigate the microbiological, inflammatory and oxidant effects of adjuvant ozone administration in experimental rat vascular graft infection model which has not been previously investigated. Methods: Forty adult Wistar rats were divided into Sham, Control, Vancomycin, Ozone, Vancomycin+Ozone groups. Grafts were inoculated with Methicillin-resistant Staphylococcus aureus (MRSA) strain and implanted subcutaneously. Rats were treated intraperitoneally with ozone and /or intramuscularly with vancomycin for 10 days. Grafts were evaluated by quantitative bacterial cultures. Blood samples were harvested for determination of thiol-disulphide and cytokine profiles. Results: There was no significant difference in bacterial counts between Control and Ozone Groups. In the Ozone Group median colony count was significantly higher than the Vancomycin and Vancomycin+Ozone Groups. Total thiol and disulphide levels increased and disulphide/native thiol and disulphide/total thiol ratios decreased in Ozone Group significantly. Albumin levels decreased significantly in Vancomycin and Vancomycin+Ozone Groups compared to the Sham Group. IL-1 and TNF-alpha levels significantly increased in infected rats. Decreased levels of VEGF due to infection reversed by ozone therapy in control and vancomycin groups. Conclusions: We didn't observe any benefit of the agent on MRSA elimination in our model. Likewise, effects of ozone on thiol-disulphide homeostasis and inflammatory cytokines were contradictory.
Descritores: Oxidantes Fotoquímicos/farmacologia
Ozônio/farmacologia
Infecções Estafilocócicas/tratamento farmacológico
Dissulfetos/sangue
Staphylococcus aureus Resistente à Meticilina/efeitos dos fármacos
Enxerto Vascular
-Valores de Referência
Fatores de Tempo
Doenças Vasculares/microbiologia
Albumina Sérica/análise
Vancomicina/farmacologia
Contagem de Colônia Microbiana
Distribuição Aleatória
Reprodutibilidade dos Testes
Citocinas/sangue
Resultado do Tratamento
Ratos Wistar
Transplantes/microbiologia
Staphylococcus aureus Resistente à Meticilina/crescimento & desenvolvimento
Homeostase/efeitos dos fármacos
Antibacterianos/farmacologia
Limites: Animais
Masculino
Tipo de Publ: Estudo de Validação
Responsável: BR1.1 - BIREME


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Id: lil-696584
Autor: Oyarzún G., Manuel; Dussaubat D., Nelson; Miller A., María Eugenia; López A., Martín; Méndez L., Gastón; Miranda G., Jorge.
Título: El ejercicio físico aumenta el daño pulmonar inducido por la exposición aguda e intermitente a 0, 5 ppm de ozono en ratas juveniles / Physical exercise increases pulmonary damage induced by acute and intermittent exposure to 0.5 ppm of ozone in juvenile rats
Fonte: Rev. chil. enferm. respir;29(3):141-148, set. 2013. ilus, graf.
Idioma: es.
Resumo: El ozono (O3) troposférico es el principal oxidante del esmog fotoquímico. Como es un contaminante aéreo, sus efectos están relacionados con la dosis efectiva = [Concentración] x [tiempo de exposición] x [ventilación minuto]. Objetivo: Determinar si el ejercicio físico -que aumenta la ventilación minuto- puede aumentar el daño pulmonar inducido por la exposición a O3 en ratas en reposo. Material y Métodos: Se usó 4 series de ratas Sprague-Dawley juveniles. Dos series fueron expuestas a 0,5 ppm de O3 (4 h diarias por 2 días) en reposo (n = 13) o durante ejercicio (n = 12). Dos series control respiraron aire filtrado (AF) en reposo (n = 13) o durante sesiones de ejercicio (n = 13), en una rueda vertical giratoria (15 min de ejercicio alternados con 15 min de descanso hasta completar 4 h diarias durante 2 días). Las ratas fueron eutanasiadas y se determinó la razón peso húmedo/peso seco (PH/PS) en el pulmón izquierdo. En el lavado broncoalveolar (LBA) del pulmón derecho, se determinó recuento total de células, proteínas totales y actividad de gamma-glutamiltraspeptidasa (GGT). Resultados: la razón PH/PS y el recuento de células y las proteínas del LBA aumentaron en las ratas en reposo expuestas a O3 comparadas con las ratas en reposo que respiraron AF (p < 0,05 ANOVA & Newman-Keuls). La actividad de GGT en el LBA fue mayor en las ratas que en ejercicio respiraron AF en comparación con las ratas que respiraron AF en reposo (p < 0,05). Hubo aumento de GGT, proteínas y recuento de células en el LBA de la serie [ejercicio + O3] comparada con la serie [reposo + O3] (p < 0,05). Conclusión: El ejercicio físico aumenta el daño pulmonar inducido por la exposición aguda e intermitente a 0,5 ppm de O3 en ratas juveniles.

Tropospheric ozone (O3) is the major oxidant of photochemical smog. Being an air pollutant, its effects are related to effective dose = [Concentration] x [exposure time] x [pulmonary ventilation]. Objective: Determine whether physical exercise -that increases pulmonary ventilation- is able to augment the pulmonary damage induced by O3 exposure in resting rats. Material and Methods: Four series of juvenile Sprague-Dawley rats were used. Two series were exposed to 0.5 ppm O3 (4 hours a day for 2 days) at rest (n=13) or during exercise (n=12). Two control series breathed filtered air (FA) at rest (n=13) or during exercise sessions (n=13), in a vertical rotary wheel (15 min exercise alternated with 15 min resting until to completing 4 hours a day for 2 days). Rats were euthanized and wet weight / dry weight ratio (W/D ratio) was determined in left lung. Total cell counting, total protein content and γ-glutamyltraspeptidase (GGT) activity were determined in the right lung bronchoalveolar lavage fluid (BALF). Results: W/D weight ratio as well as total cell counting and protein content increased in BALF from resting rats exposed to O3 as compared with resting rats breathing FA (p < 0.05 ANOVA & Newman-Keuls test). GGT activity in BALF increased in rats under exercise breathing FA as compared with resting rats breathing FA (p<0.05). GGT, proteins and cells counting increased in BALFfrom series [exercise + O3] as compared to series [resting + O3] (p< 0.05). Conclusion: Physical exercise increases lung damage induced by intermittent and acute 0.5 ppm O3 exposure in juvenile rats.
Descritores: Exercício Físico
Pneumopatias/induzido quimicamente
Oxidantes Fotoquímicos/efeitos adversos
Ozônio/efeitos adversos
-Análise de Variância
Lavagem Broncoalveolar
Pneumopatias/fisiopatologia
gama-Glutamiltransferase
Ratos Sprague-Dawley
Fatores de Tempo
Limites: Animais
Ratos
Responsável: CL1.1 - Biblioteca Central


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Id: lil-674363
Autor: Journal of Applied Oral Science; Pires1, Patrícia Teixeira; Ferreira1, João Cardoso; Oliveira2, Sofia Arantes; Silva3, Mário Jorge; Melo4, Paulo Ribeiro.
Título: Effect of ozone gas on the shear bond strength to enamel
Fonte: J. appl. oral sci;21(2):177-182, Mar-Apr/2013. graf.
Idioma: en.
Resumo: Ozone is an important disinfecting agent, however its influence on enamel adhesion has not yet been clarified. Objective: Evaluate the influence of ozone pretreatment on the shear strength of an etch-and-rinse and a self-etch system to enamel and analyze the respective failure modes. Material and Methods: Sixty sound bovine incisors were used. Specimens were randomly assigned to four experimental groups (n=15): Group G1 (Excite® with ozone) and group G3 (AdheSE® with ozone) were prepared with ozone gas from the HealOzone unit (Kavo®) for 20 s prior to adhesion, and groups G2 (Excite®) and G4 (AdheSE®) were used as control. Teeth were bisected and polished to simulate a smear layer just before the application of the adhesive systems. The adhesives were applied according to the manufacturer's instructions to a standardized 3 mm diameter surface, and a composite (Synergy D6, Coltene Whaledent) cylinder with 2 mm increments was build. Specimens were stored in 100% humidity for 24 h at 37°C and then subjected to a thermal cycling regimen of 500 cycles. Shear bond tests were performed with a Watanabe device in a universal testing machine at 5 mm/min. The failure mode was analyzed under scanning electron microscope. Means and standard deviation of shear bond strength (SBS) were calculated and difference between the groups was analyzed using ANOVA, Kolmogorov-Smirnov, Levene and Bonferroni. Chi-squared statistical tests were used to evaluate the failure modes. Results: Mean bond strength values and failure modes were as follows: G1- 26.85±6.18 MPa (33.3% of adhesive cohesive failure); G2 - 27.95±5.58 MPa (53.8% of adhesive failures between enamel and adhesive); G3 - 15.0±3.84 MPa (77.8% of adhesive failures between enamel and adhesive) and G4 - 13.1±3.68 MPa (36.4% of adhesive failures between enamel and adhesive). Conclusions: Shear bond strength values of both adhesives tested on enamel were not influenced by the previous application of ozone gas.
Descritores: Resinas Acrílicas/química
Colagem Dentária/métodos
Esmalte Dentário/efeitos dos fármacos
Metacrilatos/química
Oxidantes Fotoquímicos/farmacologia
Ozônio/farmacologia
Resistência ao Cisalhamento
-Resinas Compostas/química
Falha de Restauração Dentária
Esmalte Dentário/química
Adesivos Dentinários/química
Teste de Materiais
Microscopia Eletrônica de Varredura
Ácidos Fosfóricos/química
Distribuição Aleatória
Propriedades de Superfície
Limites: Animais
Bovinos
Responsável: BR1.1 - BIREME


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Id: lil-622908
Autor: Sadatullah, Syed; Mohamed, Nor Himazian; Razak, Fathilah Abdul.
Título: The antimicrobial effect of 0.1 ppm ozonated water on 24-hour plaque microorganisms in situ
Fonte: Braz. oral res;26(2):126-131, Mar.-Apr. 2012. ilus, tab.
Idioma: en.
Resumo: Ozone is a known oxidant present in the atmosphere and is commercially produced by simple ozonizer machines. It is a powerful antimicrobial agent in its gaseous and aqueous forms. Ozone readily dissolves in water and retains its antimicrobial property even in the dissolved state. In this study, the effect of 0.1 ppm ozonated water was analyzed on 24-hour supragingival plaque (SP) samples in situ. SP was collected from the two most posterior teeth in the contra-lateral quadrants before and after a 30-second rinse with either distilled water (control group) or 0.1 ppm ozonated water (test group). The plaque was used to count the number of total bacteria, total anaerobic bacteria, Streptococcus mutans, and Candida albicans on selective agar media. The statistical analysis of the number of colony forming units (CFUs) obtained demonstrated a significant antimicrobial effect of ozonated water on the total bacteria (p = 0.01) and anaerobes (p = 0.02). A reduction in the post-rinse CFU count for Streptococcus mutans was also observed, but the effect was not statistically significant (p = 0.07). The Candida species was only grown from one sample. Ozonated water at the 0.1 ppm concentration was effective in reducing the load of 24-hour plaque bacteria, but it did not eliminate them completely.
Descritores: Anti-Infecciosos/farmacologia
Candida albicans/efeitos dos fármacos
Placa Dentária/microbiologia
Oxidantes Fotoquímicos/farmacologia
Ozônio/farmacologia
Streptococcus mutans/efeitos dos fármacos
Água/farmacologia
-Análise de Variância
Contagem de Colônia Microbiana
Fatores de Tempo
Limites: Adolescente
Adulto
Humanos
Adulto Jovem
Tipo de Publ: Ensaio Clínico Controlado Aleatório
Responsável: BR1.1 - BIREME


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Id: lil-597638
Autor: Calunga F, José Luis; Paz A, Yuleidys; Menéndez C, Silvia; Martínez, Alfredo; Hernández, Aparicio.
Título: La ozonoterapia en pacientes con enfisema pulmonar / Rectal ozone therapy for patients with pulmonary emphysema
Fonte: Rev. méd. Chile;139(4):439-447, abr. 2011. ilus.
Idioma: es.
Resumo: Background: Ozone therapy may stimulate antioxidant systems and protect against free radicals. It has not been used formerly in patients with pulmonary emphysema. Aim: To assess the effects of rectal ozone therapy in patients with pul-monary emphysema. Material and Methods: Sixty four patients with pulmonary emphysema, aged between 40 and 69 years, were randomly assigned to receive rectal ozone in 20 daily sessions, rectal medicinal oxygen or no treatment. Treatments were repeated three months later in the frst two groups. At baseline and at the end of the study, spirometry and a clinical assessment were performed. Results: fifty patients completed the protocol, 20 receiving ozone therapy, 20 receiving rectal oxygen and 10 not receiving any therapy. At baseline, patients on ozone therapy had significantly lower values of forced expiratory volume in the frst second (fEV1) and fEV1/forced vital capacity. At the end of the treatment period, these parameters were similar in the three treatment groups, therefore they only improved significantly in the group on ozone therapy. No differences were observed in other spirometric parameters. Conclusions: Rectal ozone therapy may be useful in patients with pulmonary emphysema.
Descritores: Oxidantes Fotoquímicos/administração & dosagem
Oxigênio/administração & dosagem
Ozônio/administração & dosagem
Enfisema Pulmonar/terapia
-Administração Retal
Método Duplo-Cego
Enfisema Pulmonar/fisiopatologia
Testes de Função Respiratória
Índice de Gravidade de Doença
Resultado do Tratamento
Limites: Adulto
Idoso
Feminino
Humanos
Masculino
Pessoa de Meia-Idade
Tipo de Publ: Ensaio Clínico Controlado Aleatório
Responsável: BR1.1 - BIREME


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Id: lil-520751
Autor: Nascimento, Luiz Fernando C; Moreira, Douglas A.
Título: Are environmental pollutants risk factors for low birth weight? / Os poluentes ambientais são fatores de risco para o baixo peso ao nascer?
Fonte: Cad. saúde pública = Rep. public health;25(8):1791-1796, ago. 2009. tab.
Idioma: en.
Projeto: São Paulo State Research Foundation.
Resumo: The aim of this study was to assess the association between prenatal exposure to air pollutants and low birth weight in a medium-sized city. An ecological study was performed, using live birth data from São José dos Campos, São Paulo State, Brazil. The environmental data were obtained from the São Paul State Environmental Agency. The study included full-term newborns whose mothers were 20 to 34 years of age and had at least a complete high school education, seven or more prenatal visits, singleton pregnancy, and vaginal delivery, in order to minimize potential confounding from these variables. Logistic regression was used to estimate the effect of each pollutant. Low birth weight was defined as less than 2,500g. The sample included a total of 2,529 data from 2001 that met the inclusion criteria (25.6 percent of the total). We identified 99 newborns (3.95 percent of the sample) with low birth weight, and the pollutants sulfur dioxide and ozone were associated with low birth weight. The final model was À(x) = -1.79 + 1.30 (SO2) + 1.26 (O3). Thus, sulfur dioxide and ozone were identified as risk factors for low birth weight in a medium-sized city in Southeast Brazil.

O objetivo foi estimar o papel de poluentes no baixo peso ao nascer numa cidade de porte médio. Foi um estudo ecológico com dados obtidos da Declaração de Nascido Vivo relativos a São José dos Campos, São Paulo, Brasil. Os dados ambientais foram fornecidos pela Companhia de Tecnologia de Saneamento Ambiental (CETESB). Foram incluídos no estudo recém-nascidos a termo, com mães entre 20 e 34 anos de idade, segundo grau completo, sete ou mais consultas realizadas no pré-natal, gravidez única e parto normal, para minimizar o efeito de confusão destas variáveis. Utilizou-se regressão logística para estimar o efeito de cada poluente. Baixo peso ao nascer foi considerado aquele inferior a 2.500g. Foram incluídos 2.529 dados de 2001 que atenderam aos critérios de inclusão (25,6 por cento do total). Identificamos 99 recém-nascidos (3,95 por cento dessa amostra) com baixo peso e os poluentes dióxido de enxofre e ozônio como associados ao baixo peso ao nascer. O modelo final foi À(x) = -1,79 + 1,30 (SO2) + 1,26 (O3). Assim, identificou-se o dióxido de enxofre e ozônio como responsáveis pelo baixo peso ao nascer numa cidade de porte médio do Sudeste brasileiro.
Descritores: Poluentes Atmosféricos/toxicidade
Peso ao Nascer/efeitos dos fármacos
Recém-Nascido de Baixo Peso
Exposição Materna/efeitos adversos
Ozônio/toxicidade
Dióxido de Enxofre/toxicidade
-Brasil/epidemiologia
Modelos Logísticos
Exposição Materna/estatística & dados numéricos
Razão de Chances
Oxidantes Fotoquímicos/toxicidade
Cuidado Pré-Natal
Material Particulado/toxicidade
Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente
Fatores de Risco
População Urbana
Limites: Adulto
Feminino
Humanos
Recém-Nascido
Gravidez
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



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BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde