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Oral administration of arsenic trioxide(3 and 6 mg/kg body weight/d) for 30 d caused, as compared with vehicle control, dose-dependent significant reductions in body weight, absolute weight, protein, glycogen, as well as, total, dehydro and reduced ascorbic acid contents both in the liver and kidney of arsenic-treated mice. Succinic dehydrogenase(SDH) and phosphorylase only in the liver activities were significantly reduced in a dose-dependent manner. Acid phosphatase activity was significantly decreased in the liver of low dose arsenic-treated animals;however, significant rise in its activity was observed in high dose group. As compared with vehicle control, treatment also caused significant dose-dependent reductions in SDH, alkaline phosphatase and acid phosphatase activities in the kidney of mice. Vitamin E cotreatment as well as, 30 d withdrawal of arsenic trioxide treatment with or without vitamin E caused significant amelioration in arsenic-induced toxicity in mice. Administration of vitamin E during withdrawal of treatment also caused significant amelioration as compared from only withdrawal of the treatment. It is concluded that vitamin E ameliorates arsenic-induced toxicities in the liver and kidney of mice. 相似文献
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Koriyama M Seguchi M Ishitani T Isnansetyo A 《Environmental monitoring and assessment》2011,179(1-4):65-80
To clarify the mechanism of hypoxia in the western interior parts of the Ariake Sea (WIAS), field observation data collected in the period of 1972-2004 were analyzed using a two-layer box model. Monthly averages of advection velocity, vertical diffusion coefficient (K(z)), and biochemical oxygen consumption rate (R) in WIAS were evaluated quantitatively during the above period. The estimated advection velocity comparatively corresponded to the observed residual flow pattern of bay head in summer and winter. The estimated K(z) was relatively high (0.6-5.3 cm(2) s(?-1)) from September to March but lower (0.2-0.4 cm(2) s(?-1)) from April to August. The estimated R ranged from 0.30 to 0.46 mg L(?-1) day(?-1) during May to August. In summer, the temporal variation of dissolved oxygen (DO) concentration in the lower layer was controlled largely by K ( z ) and R. Monthly variations of K(z), R, and degree of density stratification (P) in the 1970s, the 1980s, and the 1990s-early 2000s were analyzed. P, K ( z ), and R were not significantly different among the calculated periods (p = 0.93, 0.23, and 0.49). However, the variations of R in summer between the 1970s and the other calculated periods changed. DO consumption period was longer in the 1980s and the 1990s-early 2000s than in the 1970s. R in the 1980s was highest among the calculated periods. The increase in R in the 1980s was caused by the increase in organic matter load originating from red tide phytoplankton due to a decrease in the suspension feeders. 相似文献
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Haq Fazal Yu Haojie Wang Yang Wang Li Mehmood Sahid Haroon Muhammad Bilal-Ul-Amin Fahad Shah Uddin Md. Alim Shen Di 《Journal of Polymers and the Environment》2021,29(8):2676-2685
Journal of Polymers and the Environment - Succinylated starches (SS) were prepared by the reaction of normal starch (NS) and porous starch (PS) with succinic anhydride (SA) in the presence of DMF... 相似文献
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Masumi Koriyama Yuichi Hayami Akane Koga Koichi Yamamoto Alim Isnasetyo Takaharu Hamada Kenji Yoshino Toshiya Katano Soichi Yamaguchi 《Environmental monitoring and assessment》2013,185(8):6831-6846
To investigate seasonal variations of nutrient distribution in the mudflat–shallow water system, we conducted field surveys once a month from August 2007 to July 2008 in the inner area of Ariake Bay (IAB), Japan. The NH4 +–N concentration of the water column increased in autumn because of the high NH4 + release from the sediments, ranging from 850 to 3,001 μmol?m?2?day?1. The NO3 ?–N concentration was maximal in January, which was thought to be caused by NO3 ? release from the oxic sediments and by NO3 ? regeneration due to water column nitrification. The PO4 3?–P concentration of the water column was high in summer–autumn due to the high PO4 3? release from the reduced sediments, ranging from 22 to 164 μmol?m?2?day?1. We estimated the total amounts of DIN and PO4 3?–P release (R DIN and $ {R_{{\mathrm{P}{{\mathrm{O}}_4}}}} $ , respectively) from the muddy sediment area of the IAB. In summer–autumn, R DIN and $ {R_{{\mathrm{P}{{\mathrm{O}}_4}}}} $ corresponded to about 47.7 % of DIN input and about 116.6 % of PO4 3?–P input from the river, respectively. Thus, we concluded that the muddy sediments were an important source of nutrients for the water column of the IAB during summer–autumn. In addition, we found that phosphorus necessary for the growth of Porphyra (Porphyra yezoensis, Rhodophyceae) would be insufficient in the water column when phosphorus during the Porphyra aquaculture period is supplied only from the river. Therefore, the phosphorus release from the muddy sediments was thought to play an important role in the sustainable production of Porphyra in Ariake Bay. 相似文献
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This paper examined the factors that might influence participating farmers’ willingness-to-pay for the Tree Farming Fund (TFF)
established for sustainable development of participatory forest management (PFM). Information on willingness-to-pay, socioeconomic
characteristics, and attitudes of participating farmers toward TFF were obtained from interviews with 581 participating farmers.
Logistic regression analysis was used to determine the dominant factors that might influence participating farmers’ willingness-to-pay
for the TFF. The results showed that participating farmers’ willingness-to-pay was significantly affected by (i) family income;
(ii) education level; (iii) confidence that his aspired benefits will be received; (iv) agreement with the statement that
‘PFM is sustainable under the present state of management’; (v) agreement with the statement that ‘PFM is a good strategy
for forest conservation’; and (vi) knowledge of PFM strategies. Thus, participating farmers with a higher level of education,
higher income and positive attitudes toward TFF tended to express more willingness-to-pay. Establishment of TFF could be an
effective strategy in implementing sustainable PFM in Bangladesh. For this strategy to succeed, however, active partnership
between the participating farmers and Forest Department is required. Participating farmers’ attitudes toward TFF should therefore
be taken into consideration as should the results of this study, which are important indicators of participating farmers’
positive attitudes toward TFF. 相似文献
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Mobilization of innovation and investment resources for environmental management in Russian federation regions 下载免费PDF全文
Alim Beslanovich Nagoev Violetta Valerievna Rokotyanskaya Bella Zaurbekovna Batova Fatima Ruslanovna Bischekova Madina Zurovna Hokonova 《环境质量管理》2018,27(4):47-54
Investments in environmental management and environmental protection have a decisive influence on the future of a region and its place in the economic development of the country as a whole. In this article, the principal differences between investment in environmental management and the financing of other projects are discussed. It is proven that, at present, the investment policy in the field of environmental protection of a region is oriented primarily toward current results. In such cases, it is possible to achieve only short‐term goals, and ultimately, to miss the prospect of further conservation of resources. Hence, short‐term investments in environmental protection activities and the achievement of rapid results are replaced by the commitment to promising, long‐term strategic growth. This article notes that the most effective form of implementing environmental monitoring is through environmental auditing, as auditing is performed at the expense of customers and does not require public financing. Furthermore, the effects of implementing environmental policies based on the results of environmental auditing can be even more significant than the results achieved under the State's environmental protection measures 相似文献
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Çuhadar İlyas Emir Mennik Fulya Dinç Nazlım İlkyaz Gül Alim Burat Fırat 《Journal of Material Cycles and Waste Management》2023,25(3):1746-1759
Journal of Material Cycles and Waste Management - The unprecedented increase in mobile phone spent lithium-ion batteries (LIBs) in recent times has become a major concern for the global community.... 相似文献
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