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Papers by jamil anwar

Adsorption studies for the amputation of lead from squander water by using straws of oryza sativa (rice)

International Journal of Analytical Chemistry

A novel pressurized flow system for circular thin-layer chromatography (PC-TLC) has been successf... more A novel pressurized flow system for circular thin-layer chromatography (PC-TLC) has been successfully established and employed for the separation of amino acids, dyes, and pigments for safe medical imaging applications. In this system, the mobile phase is applied to a regular TLC plate through the tube and needle of an intravenous infusion set. The needle was fused in a hole underneath the center of the plate, while the second side end of the tube was connected to a microburette containing the solvent. This new assembly proved itself better in terms of separation time (within 5 minutes) and controlled flow of the solvent and horizontal movement of analyte components over chromatograms with better separation and Rf values (glutamine: 0.26, valine: 0.44, phenylalanine: 0.60, chlorophyll a: 0.52, chlorophyll b: 0.43, xanthophyll: 0.18, carotenoid: 0.97, and pheophytin: 0.60) when a number of samples of amino acids, dyes, and pigments were separated by the developed apparatus and the co...

Atmosphere

One of the major problems of the present era is air pollution, not only for its impact on climate... more One of the major problems of the present era is air pollution, not only for its impact on climate change but also for the diseases provoked by this scourge. Among the most concerning air pollutants is particulate matter, since it can travel long distances and affect the entire globe. Antarctica is extremely sensitive to climate change and essential for regulating temperature and permitting life on Earth. Therefore, air quality studies in this region are extremely important. The aim of this review is to present the work conducted on the identification and detection of aerosols and particulate matter in the Antarctic region in the last 20 years. These studies revealed a large number of organic and inorganic species. Organochlorine pesticides or polychlorinated biphenyls represent almost 50% of the organic fraction detected in Antarctica. Furthermore, heavy metals such as Hg and Pb were also found in the region related to anthropogenic activities. To summarize, this work detailed diffe...

BioMed Research International

Nanoscience has developed various greener approaches as an alternate method for the synthesis of ... more Nanoscience has developed various greener approaches as an alternate method for the synthesis of nanoparticles and nanocomposites. The present study discusses the efficacy of berries extract for the synthesis of ZnO nanocomposites. Characterization of synthesized nanocomposite were done by SEM, UV/VIS spectrophotometry, Fourier transform infrared (FTIR) spectroscopy, and XRD techniques. The crystalline nature of the synthesized nanoparticles was verified by XRD pattern in the range of 10-80 nm. The UV absorption peak of Elaeagnus umbellata (ZnO-EU) nanocomposite at 340 nm, Rubus idaeus (ZnO-Ri) nanocomposite at 360 nm, and Rubus fruticosus (ZnO-Rf) nanocomposite at 360 nm was observed. The nanocomposites were analyzed for their antimicrobial activity and found to be effective against three phytopathogens. The antimicrobial activity of ZnO nanocomposites showed good results against Escherichia coli (341), Staphylococcus aureus (345B), and Pseudomonas aeruginosa (5994 NLF). This study...

Polish Journal of Microbiology, 2012

The antimicrobial activity of two new series of bis-piperidinium compounds with alkyl chains of d... more The antimicrobial activity of two new series of bis-piperidinium compounds with alkyl chains of different lengths against bacterial (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis) and fungal strains (Aspergillus flavus, Aspergillus niger, Rhodolorula rubera, Lipomyces lopofera and Candida albicans), are described. Antimicrobial activities of the synthesized compounds were compared to that of dodecyltrimethylammonium chloride. Bis-piperidinium salts possessing 12-16 carbon side chains showed better antimicrobial properties as compared to the standard dodecyltrimethylammonium chloride.

Journal of Environmental Science and Engineering Technology, 2019

Alizarin red S dye is frequently used in textile industry and thus present in large quantities in... more Alizarin red S dye is frequently used in textile industry and thus present in large quantities in out-drained industrial effluents, which pollute the sources of fresh water, by hindering the light and affecting the aquatic flora and fauna. Such water when used in irrigation purposes later causes threats for human health and animals life. In this work the dye has been effectively removed by using two polymeric materials i.e. microcrystalline cellulose and cotton fiber by solid phase extraction. Various concerned physical parameters were optimized for maximum adsorption through batch experiments. Kinetics of the adsorption process, thermodynamic studies, isotherm studies and desorption of the dye have also been studied. Qmax values for cotton and microcrystalline cellulose come out to be 6.612 mg/g and 5.573mg/g. Further this extraction proved to be spontaneous and endothermic in nature.

Pakistan Journal of Analytical & Environmental Chemistry, 2018

Effluents from industries directly pollute water bodies as a result the drinking water sources ar... more Effluents from industries directly pollute water bodies as a result the drinking water sources are contaminated. In present study, removal of methylene blue from aqueous medium by using raw bengal gram husk (RBGH) and microwave assisted urea modified Bengal gram husk (UMBGH) was done. Effect of different parameters such as contact time, shaking speed, adsorbent dose, temperature, pH were studied. Mechanism of adsorption was revealed using Langmuir, Freundlich and Temkin adsorption model. Experimental data followed the Langmuir adsorption isotherm that is revealed from the R 2 values and adsorption capacity (q max) 7.915 mg g-1 and 111.178 mg g-1 for both RBGH and UMBGH, respectively. The value of "n" was 1.001 and 0.979 for RBGH and UMBGH which indicated that adsorption was favorable. B T value of RBGH and UMBGH was 5.784 and 4.093, respectively which revealed that adsorption was physical in nature. Present study proved that microwave assisted urea modification of Bengal gram husk greatly increased the removal efficiency of the adsorbent.

Development of 99mTc-5-fluorouracil as a potential tumor diagnostic agent

Pakistan journal of pharmaceutical sciences, 2013

5-Fluorouracil is a well know drug for chemotherapy of various types of cancer. In the present st... more 5-Fluorouracil is a well know drug for chemotherapy of various types of cancer. In the present study, we radiolabeled 5-fluorouracil with (99m)Tc for a diagnostic study of cancer. After successful labeling of the drug we performed an animal study to evaluate the potential of this radiopharmaceutical as a tumor diagnostic agent. The results showed 98.1 ± 1.2% labeling efficacy of 5-fluorouracil with (99m)Tc. The in vitro stability of the radiolabeled drug at room temperature at 4 hr of post-labeling was…

Determination of chloride at picogram levels by molecular fluorescence in a graphite furnace

The Analyst, 1991

Chloride was determined at nanogram levels by adding excess of indium to the sample introduced in... more Chloride was determined at nanogram levels by adding excess of indium to the sample introduced into a graphite furnace and measuring the laser induced molecular fluorescence of indium chloride. The diatomic molecules of indium chloride were excited by a pulsed dye laser at 267 nm and fluorescence was measured at 359 nm. The effects of various parameters including amount of indium added, furnace thermal conditions and presence of concomitants were also studied. A linear calibration in the range of 0.025-1.25 ng and a detection limit of 17 pg of chloride were obtained under optimum conditions. The analytical usefulness of the method was checked by determining the chloride content in National Institute of Standards and Technology, Standard Reference Materials 1571a and 1571b Orchard Leaves.

Journal of Radioanalytical and Nuclear Chemistry, 2006

Extraction / Ce(III) / Eu(III) / Tm(III) / Picrolonic acid / Tributylphosphine oxide Summary. Syn... more Extraction / Ce(III) / Eu(III) / Tm(III) / Picrolonic acid / Tributylphosphine oxide Summary. Synergistic extraction of Ce(III), Eu(III) and Tm(III) as a representative of lanthanides(III) with a mixture of picrolonic acid {1p-nitrophenyl-3-methyl-4nitro-5-pyrazolon (HPA)} acting as an acidic chelating agent and tributylphosphineoxide (TBPO) as a neutral ligand in chloroform from pH 2 buffer solution has been studied. The composition of the synergistic adduct has been determined to be M(PA) 3 •2TBPO (M = Ce(III), Eu(III), Tm(III)). The effect of various anions and cations on the extraction of these metal ions has also been studied. Among the anions, fluoride, oxalate, citrate and cyanide ions masked the extraction, whereas Fe(III) and Cu(II) reduced the extraction to ∼ 90%. The formation constant, and separation factor from various metal ions has also been determined and discussed.

Zinc and Manganese Analysis in Maize by Microwave Oven Digestion and Flame Atomic Absorption Spectrometry

Journal of Food Composition and Analysis, 2000

A conventional microwave oven acid digestion system was tested for sample digestion prior to the ... more A conventional microwave oven acid digestion system was tested for sample digestion prior to the analysis of zinc and manganese in maize. The digestion procedure was based on sample dissolution with nitric acid using microwave heating in closed vessels. Under the working ...

Food Control, 2008

The occurrence of aflatoxin M 1 (AFM 1) in samples of raw milk of buffaloes and cows from differe... more The occurrence of aflatoxin M 1 (AFM 1) in samples of raw milk of buffaloes and cows from different localities in the central areas of Punjab, the province of Pakistan, was determined by using high-performance liquid chromatography (HPLC) with prior clean-up step applying immunoaffinity columns. The present study has been designed to find out the variation of levels of aflatoxin M 1 in raw milk of different localities. Feed has major role for prevalence of aflatoxin M 1 in milk and different feed regimen is being used in different areas. Total 480 milk samples were analyzed, among these 360 were of buffalo milk and 120 were of cow milk. The percentage of AFM 1 contamination in buffalo milk and cow milk was 42.5% and 52.5%, respectively. The mean value of AFM 1 was 0.027 lg L À1 in buffaloes' milk and was 0.044 lg L À1 in cows' milk. In both types of milk, level of AFM 1 concentration was higher in milk samples obtained from urban and semi-urban areas and it was minimal in milk from rural areas.

Biomass and Bioenergy, 2011

The present study explores the adsorption potential of Pleurotus ostreatus (a macro-fungus) to re... more The present study explores the adsorption potential of Pleurotus ostreatus (a macro-fungus) to remove copper, nickel, zinc and chromium from water all together. Different operational parameters such as the effect of pH, biomass dose, equilibrium time, stirring intensity, temperature and initial metal ion concentrations were studied. Maximum adsorption of Ni (II), Cu(II) and Zn(II) took place in the pH range 4.5e5.0, whereas for Cr(VI) ion, best results were achieved at pH 2.5. Nearly 150 min are required to gain sorption equilibrium. Temperature has no significant effect on biosorption in the range of 20e45 C. The maximum biosorption capacity of fungus was 8.06, 20.40, 3.22 and 10.75 mg g À1 for Cu(II), Ni(II), Zn(II) and Cr(VI) in that order. FTIR analysis pointed out the involvement of amine (eNH 2) and carboxylic (eCOOH) groups in the adsorption process. Simple and adjusted Langmuir and Freundlich isotherm models were used to explain the sorption phenomenon. For real effluents of electroplating, biosorption capacities were 2.73, 8.45, 0.88 and 4.45 mg g À1 for Cu(II), Ni(II), Zn(II) and Cr(VI) ions, respectively. Moreover, used P. ostreatus was recycled repeatedly and used many times to evaluate the adsorption efficacy on reuse, but findings pointed out that capacity decreased, to some extent, on recycling.

Arkivoc, 2010

Syntheses and applications of new bis-piperidinium and bis-pyrrolidinium compounds as effective t... more Syntheses and applications of new bis-piperidinium and bis-pyrrolidinium compounds as effective two-center phase-transfer catalysts are presented. Applications of these catalysts have been explored in etherification and N-alkylation reactions, and comparisons between these catalysts and traditional phase-transfer catalysts such as cetyltrimethylammonium bromide (CTAB) and 1-ethyl-3-methylimidazolium chloride (emim + Cl-) are presented.

Biosorptive treatment of Acid Yellow-73 dye solution with chemically modified Eugenia jambolana seeds

Estimation of Chromium (VI) in various body parts of Local Chicken

Journal of Chemistry, 2021

Nanotechnology has found vast applications in everyday life. Use of plant extract in the synthesi... more Nanotechnology has found vast applications in everyday life. Use of plant extract in the synthesis of nanocomposites produces relatively less toxic and environment-friendly materials. The present study deals with the synthesis of zinc oxide nanocomposite using gel from leaves of Aloe vera (black Aloe vera (BAV) and white Aloe vera (WAV)) and extract from powder of nuts of Terminalia arjuna. Synthesized nanocomposites were then characterized by using SEM, FTIR, and UV-Vis techniques. Disc diffusion method was opted to inquire the antimicrobial ability of nanocomposites against different bacterial strains such as Escherichia coli (−) and Burkholderia stabilis (+). ZnO-BAV possessed good antimicrobial potential against both selected strains as proved from zone of inhibitions. However, ZnO-WAV and ZnO-N showed potential against E. coli and no response for B. stabilis.

Pakistan Journal of Analytical & Environmental Chemistry, 2020

Using cost effective and greener approach for water decontamination is the need of the time. Pres... more Using cost effective and greener approach for water decontamination is the need of the time. Present work deals with the batch mode removal of anionic dye (Alizarin Red S) from water using biological materials Acacia nilotica leaves (KL), Terminalia arjuna nuts (AN) and Berri ptta capsule (BPC). Various parameters like pH, adsorbent dose, temperature, time were optimized to further conduct the isothermal, kinetics and thermodynamic studies. Isothermal studies revealed that q max values were in the order. AN nuts (52.95 mg/g) > KL (42.546 mg/g) > BPC (40.60 mg/g) following pseudo second order kinetics model. The process of anionic dye removal is spontaneous and exothermic in nature. These biological materials proved very useful for water decontamination and therefore can be used on large scale.

Mikrochimica Acta, 1992

The effects of some organic solvents and acids on the atomic fluorescence of tin in air-hydrogen ... more The effects of some organic solvents and acids on the atomic fluorescence of tin in air-hydrogen flames have been examined. Ketones and alcohols greatly reduced the florescence sensitivity in fuel rich air-hydrogen flame whereas organic acids generally enhanced the fluorescence signal. The depressive effect of organic solvents was found to be highly dependent on the fuel to oxidant ratio in the flame. An attempt has been made to explain these effects, on the basis of possible reactions occurring in the flame.