排序方式: 共有18条查询结果,搜索用时 15 毫秒
1.
Bushra Khali Ayesha Khali Sidra Muslim Ammara Habi Kishwar Khan Debora Souza Alvim Sehrish Shakoor Sonia Mustaf Sana Zaheer Momel Zoon Azmat Hayat Khan Sana Ilyas Bin Chen 《环境科学学报(英文版)》2021,33(1):28-39
This study finds out seasonal and monthly variations in Aerosol Optical Depth (AOD) over eastern and western routes of China Pakistan Economic Corridor (CPEC) and the relationship between AOD and meteorological parameters (i.e., temperature, rainfall and wind speed). The Moderate Resolution Imaging Spectroradiometer (MODIS) and Multi-angle Imaging Spectroradiometer (MISR) data was used from the terra satellite for the period of 2000-2016. This study aims to overtake the conventional view of the purpose of using the satellite datasets. This study takes on to the concept that validated satellite data sets rather should be used for the analysis instead of just validation specifically for our study region. Hence, after comparing MODIS AOD with MISR AOD, only MISR AOD dataset is used for further analysis. The results show a decreasing trend of AOD in summer season, a positive relationship between temperature and AOD during winter and spring seasons whereas a positive relationship between wind speed and AOD in winter and spring seasons over eastern and western routes. Periodic analysis of MODIS AOD and MISR AOD depicts May-Aug as the peak period of aerosol concentration over central Pakistan. The inter-annual analysis shows the aerosol trend remained higher during summer season however rainfall shows the washout effect. Eastern route has higher standard deviation and larger values for aerosol prevalence as compared to western route. The trajectory analysis using the HYSPLIT model suggests the bias of air mass trajectory caused deviation in the aerosol trend in the year 2014. 相似文献
2.
Sidra Waheed Atif Kamal Riffat Naseem Malik 《Environmental science and pollution research international》2014,21(6):4409-4417
In the current study, the bioaccumulation of essential and nonessential metals and related antioxidant activity were analyzed in three organs (muscle, gills, and liver) of herbivorous (HF) and carnivorous (CF) edible fish of Chenab River. The comparative analysis revealed a more heterogeneous accumulation of metals in the muscles of HF fish than that of CF fish [chromium (Cr, 3.4 μg g?1), cobalt (Co, 1.7 μg g?1), copper (Cu, 3 μg g?1), and iron (Fe, 45 μg g?1) versus Cr (1.3 μg g?1), Co (0.1 μg g?1), Cu (1.1 μg g?1), and Fe (33 μg g?1), respectively, P?<?0.001]. These results implied an organ-specific accumulation of metals at different trophic levels. According to logistic regression analysis, the bioaccumulation of metals had marked differences in HF and CF. The antioxidant activity was significantly related to the tissue type and the metals to which the organs are exposed to. The liver of CF fish had a higher activity of antioxidant superoxide dismutase (SOD), catalase (CAT), glutathione (GSH), and lipid peroxidase (LPO) than that of HF (P?<?0.05). LPO and guaiacol peroxidase (POD) in both groups were associated with a number of metals, but in HF, cadmium (Cd), Cr, Pb, and Zn were more related with the LPO and SOD activities. Moreover, Cd, Co, Fe, Pb, Ni, Cu, and Zn were above the permissible limits set by various agencies. In numerous cases, our results were even higher than those previously reported in the literature. The results provide an insight into the pollution pattern of Chenab River. These results may be helpful in the future to identify biomarkers of exposure in aquatic organisms. Figure
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3.
Aslam Muhammad Shoaib Huanxue Pan Sohail Sidra Majeed Muhammad Tariq Rahman Saeed ur Anees Shoaib Ahmad 《Environmental science and pollution research international》2022,29(7):10091-10100
Environmental Science and Pollution Research - Global warming and food security have led to increasing concern about agricultural crop production efficiency, especially wheat and rice farming. The... 相似文献
4.
Farooqi Sidra Anis Farooqi Ahmad Salam Sajjad Shamaila Yan Chenglin Victor Ayodele Bamidele 《Environmental Chemistry Letters》2023,21(3):1515-1553
Environmental Chemistry Letters - Global warming is partly caused by massive emissions of carbon dioxide (CO2), a greenhouse gas, in the atmosphere by industrial and other human activities.... 相似文献
5.
Ashraf Sohaib Ashraf Shoaib Ashraf Moneeb Imran Muhammad Ahmad Choudhary Zawar Ahmad Hafsa Hadiqa Tul Awais Abeer Bin Kalsoom Larab Farooq Iqra Habib Zaighum Ashraf Sidra Iqbal Qurrat Ul Ain Ghufran Muhammad Sherazi Syed Sami Hussain Akram Muhammad Kiwan Akmal Rutaba Rafique Sundas Nawaz Khawar Safdar Zartasha Siddique Uzma Nasim Hassan Muhammad Arshad Shahroze Virk Abdul Rehman Ashraf Muhammad Saboor Qazi Abdul Humayun Ayesha Izhar Mateen 《Environmental science and pollution research international》2022,29(6):8382-8392
6.
Cui Yuanpei Wei Zikun Xue Qinglin Sohail Sidra 《Environmental science and pollution research international》2022,29(30):45612-45622
Environmental Science and Pollution Research - The primary focus of this study is to evaluate the impact of various levels of education on CO2 emissions in China. Moreover, the study also tested... 相似文献
7.
Buledi Jamil Ahmed Amin Sidra Haider Syed Iqleem Bhanger Muhammad Iqbal Solangi Amber R. 《Environmental science and pollution research international》2021,28(42):58994-59002
Environmental Science and Pollution Research - The extensive release of heavy metals into the natural water bodies has become globally prevalent from past few decades. Heavy metal toxicity is... 相似文献
8.
Kiani Sidra Shaoor Farooq Amjad Ahmad Masroor Irfan Naseem Nawaz Mohsan Irshad Muhammad Asim 《Environmental science and pollution research international》2021,28(43):60477-60494
Environmental Science and Pollution Research - Nuclear, biological, and chemical warfare (NBC) agents cause an inevitable threat to defense forces and civilians. Exposure to these toxic agents... 相似文献
9.
In this study, we explored the multiple heavy metal-resistant yeast isolated from heavy metal-polluted environment. The isolated yeast showed maximum growth at 30 °C, pH 7.0, and the strain was identified as Candida tropicalis through 18S ribosomal RNA (rRNA) gene sequence analysis. Yeast cells grew well in medium containing different concentrations of heavy metal ions [CdCl2, Pb(NO3)2, NaAsO2, CuSO4 and K2Cr2O7]. Minimum inhibitory concentration (MIC) against different metal ions was ranged from 5 to 19 mM, and the metal resistance value against each metal observed by yeast cells was 5 mM (Cr), 10 mM (Cd), 15 mM (As), 14 mM (Cu) and 19 mM (Pb) and increased in the following order: Pb > Cu > As ≥ Cd > Cr. The total cellular glutathione, GSH/GSSG redox couple and metallothioneins like protein (MT) were assayed by growing cultures for 24 h and exposed to 100 mg/L of each heavy metal ion. Remarkable increase in γ-glutamylcysteinylglycine (GSH) level was determined in arsenic and cadmium treatment followed by chromium, lead and copper. Stressed cells had much more oxidized GSH than unstressed cells. GSH/GSSG ratio was significantly increased in cadmium and copper treatment in contrast to chromium, arsenic and lead. Statistical analysis revealed significantly higher cysteine level in all metal-treated samples as compared to control. Antioxidant glutathione transferase activity was not detected in metal-treated and untreated yeast samples. One-dimensional electrophoresis of proteins revealed marked differences in banding pattern of heavy metal-exposed yeast samples. A prominent 20 kDa band was observed in all treated samples suggesting that some differential proteins could be over-expressed during heavy metal treatment and might be involved in cell resistance mechanisms. 相似文献
10.
Zhao Weijun Hafeez Muhammad Maqbool Adnan Ullah Sana Sohail Sidra 《Environmental science and pollution research international》2021,28(37):51199-51209
Environmental Science and Pollution Research - With rapid economic growth, BRICS is facing enormous burdens of carbon emission and severe issues of income inequality. However, behind this economic... 相似文献