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排序方式: 共有114条查询结果,搜索用时 826 毫秒
31.
Indian pangolin (Manis crassicaudata) is a fossorial, “Near threatened” mammalian species occurring in Pakistan and facing a risk of endangerment in its wild habitat. Being nocturnal, ecological data of the species is lacking in the country and in south Asia as well. The current study investigated some ecological parameters of the species like, distribution, habitat analysis, population and food habits in district Chakwal of Potohar Plateau. Illegal trapping and killing by professional nomads for its scales is the main threat to the species in the study area. 相似文献
32.
Naqvi Anber Qadir Abdul Mahmood Adeel Baqar Mujtaba Aslam Iqra Sajid Farhan Mumtaz Mehvish Li Jun Zhang Gan 《Environmental science and pollution research international》2018,25(15):14551-14562
Environmental Science and Pollution Research - The present study biomonitored the placental polychlorinated biphenyl (PCB) concentrations in women from Punjab Province, Pakistan, that provides the... 相似文献
33.
Taurine mitigates nitrite-induced methemoglobin formation and oxidative damage in human erythrocytes
Ansari Fariheen Aisha Ali Shaikh Nisar Mahmood Riaz 《Environmental science and pollution research international》2017,24(23):19086-19097
Environmental Science and Pollution Research - Nitrite is present as a noxious contaminant in drinking water and causes oxidative damage in various tissues of humans and animals. It is a well-known... 相似文献
34.
Ullah Shafqut Mahmood Tahir Khan Muhammad Zamir 《Environmental science and pollution research international》2022,29(50):75402-75416
Environmental Science and Pollution Research - According to Jevon’s paradox, energy efficiency leads to more energy consumption instead of low. So, calculating the size of energy rebound... 相似文献
35.
Hospital waste is considered dangerous because it may possess pathogenic agents and can cause undesirable effects on human health and the environment. In Iran, neither rules have been compiled nor does exact information exist regarding hospital waste management. The survey presented in this article was carried out in all 15 private hospitals of Fars province (Iran) from the total numbers of 50 governmental and private hospitals located in this province, in order to determine the amount of different kinds of waste produced and the present situation of waste management. The results indicated that the waste generation rate is 4.45 kg/bed/day, which includes 1830 kg (71.44%) of domestic waste, 712 kg (27.8%) of infectious waste, and 19.6 kg (0.76%) of sharps. Segregation of the different types of waste is not carried out perfectly. Two (13.3%) of the hospitals use containers without lids for on-site transport of wastes. Nine (60%) of the hospitals are equipped with an incinerator and six of them (40%) have operational problems with the incinerators. In all hospitals municipal workers transport waste outside the hospital premises daily or at the most on alternative days. In the hospitals under study, there aren't any training courses about hospital waste management and the hazards associated with them. The training courses that are provided are either ineffective or unsuitable. Performing extensive studies all over the country, compiling and enacting rules, establishing standards and providing effective personnel training are the main challenges for the concerned authorities and specialists in this field. 相似文献
36.
37.
Qaisar Mahmood Faiqa Masood Zulfiqar Ahmad Bhatti Maria Siddique Muhammad Bilal Hajira Yaqoob 《毒物与环境化学》2013,95(4):530-541
This study demonstrates the bioremediation potential of anaerobic sludge and cattail (Typha angustifolia) for the treatment of the dye Reactive Blue 19 (RB19). The anaerobic sludge and cattails used in this study were not previously exposed to dyes or other xenobiotics. Different anaerobic sludge concentrations (30%, 50%, and 70%) were used along fixed dye concentrations at pH 8.0 and 25 °C. Subsequently, 50% sludge was selected to treat RB19 at various concentrations. The discoloration of non-hydrolyzed dye was between 70% and 85% using 50% biomass. For the hydrolyzed form of RB19, the range of decoloration was 70%–90%. Dye treatment efficiencies between 50% and 75% were observed for the two forms of the dye when treated with T. angustifolia. Overall, the anaerobic biomass at pH 8.0 showed better potential than cattails to treat RB19. The observation that non-enriched anaerobic sludge can decolorize RB19 is important because it opens up the prospects of developing anaerobic treatment systems, which can easily decolorize dyes in industrial wastewaters and also possesses potential advantages over systems using defined bacterial cultures. 相似文献
38.
Christopher L. Owen Charles G. Messing Greg W. Rouse Mahmood S. Shivji 《Marine Biology》2009,156(8):1517-1529
Phanogenia gracilis sensu lato is a shallow-water crinoid distributed throughout the Indo-western Pacific. The taxonomy of P. gracilis s.l. is clouded by the presence of two distinct morphotypes, each differing in morphology and ecology. The goal was to determine
the taxonomic status of P. gracilis s.l. using partial gene sequences of two mitochondrial DNA genes, cytochrome oxidase c subunit I and NADH dehydrogenase subunit
II, in conjunction with morphological and ecological data. The molecular phylogenies revealed three lineages separated by
5.0–6.6% corrected genetic distance, which is consistent with the genetic distances among other echinoderm species. Neither
morphotype was monophyletic, nor was any examined morphological character exclusive to any one lineage. Discriminant function
analysis (DFA) of the morphological and ecological data yielded significant results when grouping P. gracilis by morphotype and by clades recovered in the phylogenetic analyses, but grouping by sample locality was rejected. Although
DFA results of grouping by clade were significant, jackknife support was weak, while only correctly grouping specimens by
their respective clades 65% of the time. The results suggest the possibility of cryptic species, but additional molecular
and morphological data are needed to confirm this. This study demonstrates the need to reevaluate the taxonomy of crinoid
species and their respective diagnostic characters. 相似文献
39.
Meraj Alam Khan Ayaz Mahmood Dar Mohd Arsalan 《Journal of Polymers and the Environment》2017,25(3):717-727
A series of organic–inorganic conducting nano polymer-matrix composite cation-exchanger have been synthesized via sol–gel method and characterized through FTIR, XRD, TGA-DTA, SEM, and TEM studies. The structural studies confirm the semi-crystalline nature of the material but the morphology of the exchanger gets changed after incorporation of inorganic moiety. The particle size of the nano-composite was found to be 19.2 nm. The observed band gap for the different samples was found to be in the range of 3.70–4.61 eV which shows that nano-composite material covers semiconducting range but the resistivity of samples is highly dependent on the percentage of inorganic part in the composite. Further the oxidative degradation of the polymer backbone begins after the removal of trapped water successively followed by dopant and low molecular weight oligomers. During the antimicrobial screening, the nano-composite was found to be active against different strains of bacteria and fungi. Gel electrophoresis and molecular docking studies were carried out to check the interaction and mechanism of inhibition of microbial growth, respectively by studying the effect of the nano-composite with DNA-Topoisomerase-1. 相似文献
40.
Ariffin Muhammad Afif Wan Mahmood Wan Mohd Faizal Harun Zambri Mohamed Ramizi 《Journal of Material Cycles and Waste Management》2017,19(3):1244-1252
Journal of Material Cycles and Waste Management - This paper focuses on the performance of oil palm empty fruit bunch (EFB) gasification using a medium-scale downdraft gasifier for power... 相似文献