排序方式: 共有38条查询结果,搜索用时 15 毫秒
31.
M.A. Syed J.H. Arshad S. Mat 《Journal of environmental science and health. Part. B》2013,48(4):347-354
Abstract Paddy (unmilled rice), milled rice and maize‐bound 14C residues were prepared using 14C‐succinate‐labelled malathion at 10 and 152 ppm. After 3 months, the bound residues accounted for 12%, 6.5% and 17.7% of the applied dose in paddy, milled rice and maize respectively in the grains treated at 10 ppm. The corresponding values for the 152 ppm were 16.6%, 8.5% and 18.8%. Rats fed milled rice ‐ bound 14C‐residues eliminated 61% of the 14C in the faeces and 28% in the urine. The corresponding percentages for paddy and maize were 72%, 9% and 53%, 41% respectively; indicating that bound residues from milled rice and maize were moderately bioavailable. When rice‐bound malathion residues (0.65 ppm in feed) were administered to rats in a 5 week feeding study, no signs of toxicity were observed. Plasma and RBC cholinesterase activities were slightly inhibited: blood urea nitrogen was significantly elevated in the test animals. Other parameters examined showed no or marginal changes. 相似文献
32.
Persons from 14 different fruit and vegetable farm stations from Gadap (rural area), Karachi-Pakistan were examined for the presence of pesticide (cypermethrin, deltamethrin, polytrin-C, diazinon, monocrotophos, DDT and DDE) residues in their blood samples. The present study is concerned with effects of residue on the enzyme levels (GPT, GOT and ALP) as well as the health hazards of pesticide exposed persons. There is a significant increased in the enzyme levels at different stations. Exposed persons complained about liver and kidney dysfunctions and RTI. It may be concluded that exposure of multiple pesticides for prolonged period has affected the normal functioning of different organ systems and possibly produced characteristics clinical effects such as hepatitis, dyspnea and burning sensation in urine. 相似文献
33.
Muzammil Anjum Azeem Khalid Tariq Mahmood Muhammad Arshad 《Journal of Material Cycles and Waste Management》2012,14(4):388-395
Management of solid organic waste has become a major challenge in developing countries. Raw solid organic waste can be converted into biogas through anaerobic digestion; however, the efficiency of the process is influenced by various factors including the composition of the substrate. The present study was designed with the objective of enhancing the biodegradability of the organic fraction of municipal solid waste (OFMSW) and biogas production through co-digestion of the substrate with melon residues. The study was conducted in batch mode in four phases. The results revealed that an addition of melon waste at the rate of 300?g?kg?1 OFMSW substantially increased the biodegradation rate and biogas production compared to OFMSW alone. The removal of up to 57.2?% volatile solids and a carbon to nitrogen (C/N) ratio of 15.9 was achieved at a 60?% water level when the digestion mixture was treated with inocula collected from partially-degraded food waste. The findings of this study reveal that melon residues could be used as a potential co-substrate to enhance the biodegradability of OFMSW and biogas production. 相似文献
34.
CO2 is the main greenhouse gas which causes global climatic changes on larger scale. Many techniques have been utilised to capture CO2. Membrane gas separation is a fast growing CO2 capture technique, particularly gas separation by composite membranes. The separation of CO2 by a membrane is not just a process to physically sieve out of CO2 through the controlled membrane pore size. It mainly depends upon diffusion and solubility of gases, particularly for composite dense membranes. The blended components in composite membranes have a high capability to adsorb CO2. The adsorption kinetics of the gases may directly affect diffusion and solubility. In this study, we have investigated the adsorption behaviour of CO2 in pure and composite membranes to explore the complete understanding of diffusion and solubility of CO2 through membranes. Pure cellulose acetate (CA) and cellulose acetate-titania nanoparticle (CA-TiO2) composite membranes were fabricated and characterised using SEM and FTIR analysis. The results indicated that the blended CA-TiO2 membrane adsorbed more quantity of CO2 gas as compared to pure CA membrane. The high CO2 adsorption capacity may enhance the diffusion and solubility of CO2 in the CA-TiO2 composite membrane, which results in a better CO2 separation. The experimental data was modelled by Pseudo first-order, pseudo second order and intra particle diffusion models. According to correlation factor R2, the Pseudo second order model was fitted well with experimental data. The intra particle diffusion model revealed that adsorption in dense membranes was not solely consisting of intra particle diffusion. 相似文献
35.
Huibo Wang Awan Rehmat Ullah Qayyum Abdul Munir Arshad Khan Jamal Gulzar Fatima 《Environmental science and pollution research international》2022,29(10):14355-14370
Environmental Science and Pollution Research - The construction of green finance index is a three-tiered process that involves macroeconomic, ecological, and monetary indicators. Therefore, this... 相似文献
36.
Rabbany Md Ghulam Mehmood Yasir Hoque Fazlul Sarker Tanwne Hossain Kh Zulfikar Khan Arshad Ahmad Hossain Mohammad Shakhawat Roy Rana Luo Jianchao 《Environmental science and pollution research international》2022,29(1):444-456
Environmental Science and Pollution Research - This study analyzes the effects of credit constraints on technical efficiency of Boro rice growers in the district of Pabna in Bangladesh. Using a... 相似文献
37.
Villanthenkodath Muhammed Ashiq Ansari Mohd Arshad Shahbaz Muhammad Vo Xuan Vinh 《Environment, Development and Sustainability》2022,24(4):5163-5194
Environment, Development and Sustainability - A plethora of studies reveals that tourism development and structural change contribute to the socioeconomic progress of the countries. However, the... 相似文献
38.
Lin Haiying Gao Youhan Zhu Tianqi Wu Huayuan Hou Pengshen Li Wenlong Hou Shuxia Arshad Muhammad Umer 《Environmental science and pollution research international》2022,29(58):87157-87169
Environmental Science and Pollution Research - Pastoral areas are the key difficulty in China’s pursuit of common prosperity and a key region for China to build the northern ecological safety... 相似文献