Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros

Bases de dados
País/Região como assunto
Tipo de documento
País de afiliação
Intervalo de ano de publicação
1.
Environ Sci Pollut Res Int ; 30(37): 87071-87086, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37418189

RESUMO

Carbon emission (CE) has led to increasingly severe climate problems. The key to reducing CE is to identify the dominant influencing factors and explore their influence degree. The CE data of 30 provinces from 1997 to 2020 in China were calculated by IPCC method. Based on this, the importance order of six factors included GDP, Industrial Structure (IS), Total Population (TP), Population Structure (PS), Energy Intensity (EI) and Energy Structure (ES) affecting the CE of China's provinces were obtained by using symbolic regression, then the LMDI and the Tapio models were established to deeply explore the influence degree of different factors on CE. The results showed that the 30 provinces were divided into five categories according to the primary factor, GDP was the most important factor, followed by ES and EI, then IS, and the least TP and PS. The growth of per capita GDP promoted the increase of CE, while reduced EI inhibited the increase of CE. The increase of ES promoted CE in some provinces but inhibited in others. The increase of TP weakly promoted the increase of CE. These results can provide some references for governments to formulate relevant CE reduction policies under dual carbon goal.


Assuntos
Dióxido de Carbono , Carbono , Carbono/análise , Dióxido de Carbono/análise , China , Indústrias , Desenvolvimento Econômico
2.
Environ Monit Assess ; 195(1): 41, 2022 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-36301357

RESUMO

The amount of China's sulfur dioxide emission remains significantly large in recent years. To further reduce sulfur dioxide emission, the key is to find out the leading factors affecting sulfur dioxide emission and then take measures to control it accordingly. In order to investigate the influential factors of sulfur dioxide emission of various provinces, the data of sulfur dioxide emission of 30 provinces in China from 2001 to 2020 were collected. We established the symbolic regression model to explore the relationship between the GDP (x1), total population (x2), total energy consumption (x3), thermal power installed capacity (x4), and sulfur dioxide emission (dependent variable) for each province. The results show that the amount of China's total sulfur dioxide emission and sulfur dioxide emission in most provinces meet the environmental Kuznets curve (EKC). The influential degree of the factors affecting China's sulfur dioxide emission are GDP, total energy consumption, thermal power installed capacity, and total population. The provinces with the primary factor of GDP have the lowest average total energy consumption and average thermal power installed capacity, and their average sulfur dioxide emissions are also relatively low. The provinces with the primary factor of GDP do not show obvious geographical characteristics, but the provinces with the primary factor of total energy consumption are all distributed in southern China. Based on the research results, some control measures are also put forward.


Assuntos
Dióxido de Carbono , Dióxido de Enxofre , Dióxido de Enxofre/análise , Dióxido de Carbono/análise , Monitoramento Ambiental , China , Desenvolvimento Econômico , Carbono
3.
Chemosphere ; 112: 170-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25048903

RESUMO

Exposure to polybrominated diphenyl ether (PDBE) and methylmercury (MeHg) can occur simultaneously as both contaminants are found in the same food sources, especially fish, seafood, marine mammals and milk. The aim of this study was to assess the effects of exposure to low levels of MeHg (2.0 µg mL(-1) in drinking water) and BDE-99 (0.2 mg kg(-1) d(-1)) from gestational day 6 to postnatal day (PND) 21, alone and in combination, on neurobehavioral development and redox responses in offspring. The present study demonstrated an interaction due to co-exposure with low doses of MeHg and BDE-99 enhanced developmental neurotoxic effects. These effects were manifested as the delayed appearance of negative geotaxis reflexes, impaired motor coordination, and induction of oxidative stress in the cerebellum. In particular, the cerebellum may be a sensitive target for combined MeHg and BDE-99 toxicity. The neurotoxicity of low dose MeHg was exacerbated by the presence of low dose of BDE-99. It is concluded that prenatal co-exposure to MeHg and BDE-99 causes oxidative stress in the cerebellum of offspring by altering the activity of different antioxidant enzymes and producing free radicals. Hg retention was not affected by co-exposure to BDE-99. However, MeHg co-exposure seemed to increase BDE-99 concentrations in selected brain regions in pups compared to pups exposed to BDE-99 only. These results showed that the adverse effects following prenatal co-exposure to MeHg and BDE-99 were associated with tissue concentrations very close to the current human body burden of this persistent bioaccumulative compound.


Assuntos
Encéfalo/efeitos dos fármacos , Éteres Difenil Halogenados/toxicidade , Compostos de Metilmercúrio/toxicidade , Neurotoxinas/toxicidade , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Animais , Encéfalo/metabolismo , Encéfalo/fisiopatologia , Relação Dose-Resposta a Droga , Interações Medicamentosas , Feminino , Masculino , Estresse Oxidativo/efeitos dos fármacos , Gravidez , Efeitos Tardios da Exposição Pré-Natal/metabolismo , Efeitos Tardios da Exposição Pré-Natal/fisiopatologia , Ratos , Caracteres Sexuais
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA