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41.
42.
Praveen N Saifi MA Shadab GG 《Journal of environmental biology / Academy of Environmental Biology, India》2011,32(1):95-98
Fansidar is a fixed combination of two antimalarial agents a diaminopyrimidine (Pyrimethamine) and a sulphonamide (Sulphadoxine) in the ratio 1:20- that have been used extensively worldwide for the treatment of Chloroquine resistant Plasmodium falciparum malaria, toxoplasmosis and Pneumocystis carinii pneumonia in patients with the acquired immunodeficiency syndrome. This study examined the effect of Fansidar on chromosomes in human lymphocyte culture. Fansidar was added to peripheral blood lymphocyte cultures in vitro at four different concentrations: 5,15, 25 and 50 microl in the ratio 1:20, 3:60, 5:100 and 10:200 microg ml(-1). Result shows that this drug induces moderate increase in the frequency of gaps, breaks and rearrangements. Therefore it can be concluded that Fansidar has moderate clastogenic effect on human chromosomes in vitro. 相似文献
43.
Kinetic adsorption of application of carbon nanotubes for Pb(II) removal from aqueous solution 总被引:1,自引:0,他引:1
Nassereldeen A Kabbashi Muataz A Atieh Abdullah Al-Mamun Mohamed E S Mirghami MD Z Alam Noorahayu Yahya 《环境科学学报(英文版)》2009,21(4)
The capability of carbon nanotubes (CNTs) to adsorb lead (Pb) in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb(II) was reach to maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of Pb(II) on the surface of CNTs (adsorption capacity Xm = 102.04 mg/g). From this study, the results indicates that the highest percentage removal of Pb (96.03%) can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min. 相似文献
44.
M. Anwar H. Khan M. M. Nazmul Hoque S. Shamsul Alam M. J. Ashfol Graham Nickless Dudley E. Shallcross 《环境科学学报(英文版)》2011,23(1):60-64
Night-time OH levels have been determined for UK urban surface environments using two methods, the decay and steady state
approximation methods. Measurement data from the UK National Environmental Technology Centre archive for four urban sites
(Bristol, Harwell, London Eltham and Edinburgh) over the time period of 1996 to 2000 have been used in this study. Three reactive
alkenes, namely isoprene, 1,3-butadiene and trans-2-pentene were chosen for the calculation of OH levels by the decay method. Hourly
measurements of NO, NO2, O3, CO and 20 VOCs were used to determine night-time OH level using the steady state approximation
method. Our results showed that the night-time OH levels were in the range of 1 105–1 106 molecules/cm3 at these four urban sites in
the UK. The application of a t-test of these analyses indicated that except Bristol, there was no significant di erence between the OH
levels found from the decay and steady state approximation methods. Night-time levels of the OH radical appeared to peak in summer
and spring time tracking the night-time O3 levels which also passed through a maximum at this time. 相似文献
45.
Rehman Shafiqur Natarajan Narayanan Mohandes Mohamed A. Meyer Joshua P. Alam Md Mahbub Alhems Luai M. 《Environmental science and pollution research international》2022,29(57):85842-85854
Environmental Science and Pollution Research - The objective of this work is to understand the fluctuating nature of wind speed characteristics on different time scales and to find the long-term... 相似文献
46.
Ge Mingliang Li Xinxiang Li Yueying Jahangir Alam S. M. Gui Yuee Huang Yongchao Cao Luoxiang Liang Guodong Hu Guoqing 《Journal of Polymers and the Environment》2022,30(9):3890-3900
Journal of Polymers and the Environment - In this study, the nanohybrid drug carrier were synthesized by Pickering emulsion-templated encapsulation (PETE) method to control the... 相似文献
47.
Hasan Md. Sabbir Al Foisal Jannat Khan G. M. Arifuzzaman Jahan Rownok Hasanuzzaman Md. Alam Md. Shamsul Karim M. Minnatul Gafur M. A. Khan Muhammad Angkan Sabur Md. Abdus 《Journal of Polymers and the Environment》2022,30(7):2875-2887
Journal of Polymers and the Environment - Modification of cellulose with silver nanoparticles produces various nanocomposites with significantly developed properties. This work aims to prepare a... 相似文献
48.
The present investigation was conducted to determine the contamination status of arsenic (As), cadmium (Cd), and lead (Pb) in the wetland waters of Bhaluka in Bangladesh. Water samples were collected from 15 selected wetlands of Bhaluka region and analyzed using an atomic absorption spectrophotometer. Estimated results of three metals detected were As (7–80?µg?L?1), Pb (0–86?µg?L?1) and Cd (0–70?µg?L?1) in water samples in all wetlands. The level of As in all investigated wetlands (93%) was higher than that of WHO recommended permissible limit of drinking water except Alanga wetland. However, As levels were higher than that recommended for livestock water quality levels. Eighty-seven percent of the investigated wetlands showed lower content of Pb than WHO recommended permissible limit of drinking water, but two wetland waters (Dohuria-1 and Chowdhuri) were polluted with higher Pb levels. Sixty-seven percent of the investigated wetlands displayed higher levels of Cd than WHO recommended permissible limit in drinking water. Dissolved organic material showed no significant difference among the 15 investigated wetlands water, but total dissolved solids was significantly greater. The condition of the water of all wetlands was basic pH. All water samples were applied to linear regression equation and correlation coefficients where values showed no significant differences. Data demonstrate that the estimated high metal concentrations of these ponds may contribute to bioaccumulation within plants, food grains and shrimp. 相似文献
49.
Muhammad H. H. B. Asad Ryan J. R. McCleary Ilnur Salafutdinov Fiaz Alam Hamid Saeed Shah Sumbal Bibi 《毒物与环境化学》2013,95(1-2):91-116
Because of the potential of significant geographic variation in the compositions of snake venoms, much insight can be gained by examining individuals originating from diverse locations, and detailed characterization of any species can only be done by including animals from the entire range. Pakistani N. naja (formerly N. naja karachiensis) venom was decomplexed by applying diverse techniques and found a concoction of proteins (a total of 43 venomous proteins comprising 11 super families) from 6 to 200 kilodaltons in size. Among them three finger toxins (58%), phosphoplipses A2 (19%), snake venom metalloproteinases (5%), l-amino acid oxidases (5%), helvepryns (3%), vespryns (2%), cobra venom factor (2%), 5′-nucleotidases (2%), venom nerve growth factor (2%), and Kunitz type serine protease inhibitor (2%) were included. It is the first report that this venom possesses significantly higher percentage of three finger toxins belonging to the cytotoxins (32% overall) and α‐neurotoxins (32% overall, predominately long chain neurotoxins, 24% overall) compared to N. naja from other geographic locations. Better understanding of intraspecific variations in venom can improve the development of location-specific anti-venoms. Furthermore, this pool of diverse toxins could potentially be a source of novel drug candidates for the treatment of muscarinic acetylcholine receptors mediated nervous disorders. 相似文献
50.
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