Taj Muhammad Jahangir - Academia.edu (original) (raw)

Papers by Taj Muhammad Jahangir

International Journal of Environmental Analytical Chemistry, Feb 27, 2023

Groundwater for Sustainable Development

Arabian Journal of Geosciences, 2022

Thirty groundwater samples were collected from the dug well aquifer of Islamkot sub-district, Sou... more Thirty groundwater samples were collected from the dug well aquifer of Islamkot sub-district, Southern Sindh, Pakistan, during March, 2021 to investigate their hydrogeochemical characteristics and fitness for drinking and irrigation use. The results of multivariate statistical, hydrogeochemical, and chloro-alkaline indices and two-component variable graphs confirm ion exchange (advanced and reverse) processes in the study area. Gibb’s plots reveal that silicate weathering and evaporation are significant processes that govern water geochemistry. Principal component analysis and correlation coefficient reveal that total dissolved solids, electrical conductivity, Mg+2, Na+, Cl−, and SO4−2 were positively correlated and similarly confirmed through hierarchical cluster analysis. The mineralogical study of the aquifer sediment reveals that quartz, clay, calcite, and dolomite minerals were present, and the saturation index indicated that halite is under-saturated relative to groundwater samples and may lead to the dissolution of halite and increase the concentration of Na+ and Cl−. Chadha diagram indicates that Na+, K+, Cl−, and SO4−2 hydrogeochemical facies and Van Wardhum plot reveal the thalassotrophic water type in the study area. The drinking water quality index reflects that 50% of groundwater was unsuitable for drinking. Wilcox and salinity hazard diagram reveal that most samples clustered in very high salinity and very high sodium water type. Sodium adsorption ratio, Kelly’s ratio, and sodium percentage reveal that most groundwater samples were unfit for agriculture use. However, residual sodium carbonate and the results of the permeability index were suitable for irrigation purposes.

Sindh University Research Journal, 2016

The aim of the study was to compare the effects of different gamma radiation doses e.g., 150, 200... more The aim of the study was to compare the effects of different gamma radiation doses e.g., 150, 200 and 250 Gy on leaf nectarines, leaf length, leaf width, trichome density and their length in relation to jassid population. The results showed highly susceptible, moderately susceptible and high resistance in parents and their gamma irradiated cotton lines against jassid populations during, 2008 and 2009. There was leafing length had non-significant and negative correlation with jassid populations in parents, 200 and 250 Gy, while, the leaf width and the leaf nectarines spots in parents and 150 Gy cotton lines. However, leaf length were non-significant and positive correlations in 150 Gy, whereas, the leaf width and the leaf nectarines spots in parents, 200 and 250 Gy lines during both years study. Trichome density and their length had negative and non-significant correlation with jassid populations in all parents and their gamma irradiated lines. Further liner regression coefficients r...

DESCRIPTION The gossypol content of cotton Gossypium spp. has been of interest to plant breeders ... more DESCRIPTION The gossypol content of cotton Gossypium spp. has been of interest to plant breeders because those that have high levels often carry resistance to the spotted bollworm. However, its presence has economic disadvantages to the seed and oil processing industry. The cage experiment was evaluated on no food choices of Earias insulana (Boisd.) and Earias vittella (Fab.) and their relation with gossypol concentration in floral squares, flowers and green bolls during 2009. The result showed that highly susceptible parent line St-7 and B-3 irradiated with 250 Gy and highly resistance St-7 and SP cotton lines treated with 150 Gy to both Earias spp. A correlation showed significant and non-significant negative correlations with gossypol concentration in all parent and their gamma irradiated (150, 200, 250 Gy) cotton lines against both Earias spp. Correlation coefficient results revealed that the maximum gossypol concentration was most important factor to develop resistance against ...

Research Square (Research Square), Jun 28, 2023

Earth systems and environment, Feb 16, 2018

Journal of plant and environmental research, 2020

PubMed, 2018

The present study was designed to explore the easy and fast method diagnosis of tobacco products ... more The present study was designed to explore the easy and fast method diagnosis of tobacco products in saliva of tobacco users (TU) by FTIR. Sixty four male tobacco users (TU) with mean age range 15.3 to 30.7 years were randomly selected for collection of saliva samples before and after tobacco use (smoking, chewing and dipping tobacco). Twenty were the smoking tobacco users (STU), 24 were chewing tobacco users (CTU) and 20 were dipping tobacco users (DTU). CTU were the users of Mainpuri (n=10) and users of PEN, FIT, 2100 (n=14). Forty eight saliva samples of age and gender matched healthy individuals with negative personal or family history of any addiction were also collected for comparison which served as controls. All were analyzed for their salivary flow rate, salivary pH and salivary diagnostic bands by FTIR. Significantly increased SFR (p<0.05) and salivary pH were found in after chewing tobacco as compared to before its chewing. The comparison between after tobacco use and controls we found decreased SFR and salivary pH for STU. Significant decreased SFR and increased salivary pH were found before or after use of dipping tobacco as compared to controls. Sharp bands at 735-745 cm-1 were found and may be used as salivary diagnostic bands for STU, 945-949 cm-1 for DTU and 900-915 cm-1 for CTU as well as DTU. In conclusion, the salivary diagnostic bands were found at 735-745 cm-1, 900-915 cm-1 and 945-949 cm-1 for TU by easy and fast method using FTIR.

Acta Chimica Slovenica, Mar 5, 2016

Journal of Liquid Chromatography & Related Technologies, Dec 9, 2019

Abstract A high performance liquid chromatographic (HPLC) method has been proposed for separation... more Abstract A high performance liquid chromatographic (HPLC) method has been proposed for separation of Pt (II), Au (III), V (IV)/V (V), Mo (VI) and analysis of cis-platin on the basis of pre column derivatization using pyridoxal-4-phenyl-3-thiosemicarbazone (PDPTSC) as complexing reagent. The complexes were extracted in trichloromethane or n-butanol and were separated from Kromacil100, C-18, 10 µm (250 cm × 4.6 mm, i.d) column with a ternary mixture of acetonitrile:water:methanol (20:30:50 V/V/V) with a flow rate of 1 mL.min−1 and ultra-violet detection was at 320 nm. The linear calibration was achieved with 0.5–5 µg.mL−1 and detection limit of 10 ng.mL−1 platinum (II). The determination of cis-platin (cis-plasol) injection by HPLC method showed RSD 2.41%. The developed method was employed for the analysis of cis-platin from urine and blood serum of cancer patients after chemotherapy and platinum contents were found 47.0–87.0 ng.mL−1 and 77.4–424 ng.mL−1 with RSD within 0.824–3.42% for urine and 0.421–3.84% for serum. The recovery of platinum (II) was found as 98.1% with RSD 1.99%.

Polymer Bulletin, Sep 4, 2020

Two new diphenol Schiff base monomers were prepared through condensation reaction between 4-hydro... more Two new diphenol Schiff base monomers were prepared through condensation reaction between 4-hydroxybenzaldehyde and 4,4′-diaminodiphenyl sulfone (dapsone) or 1,2-cyclohexanediamine. The resulting Schiff bases were reacted with terephthaloyl dichloride through polycondensation and formed two novel poly(azomethine-ester)s. The molecular masses of diphenol Schiff bases were determined through E.I mass spectroscopy. The elemental composition of poly(azomethine-ester)s was evaluated through CHN analysis. The structures of diphenol Schiff bases and poly(azomethine-ester)s were confirmed though FT-IR, 1HNMR, UV–Vis spectroscopy, fluorescence, SEM and thermal analysis (TG/DTA). All the synthesized compounds were fluorescent and indicated 2–4 emission bands with maximum emission intensities within 342–682 nm at different excitation wavelengths. The diphenol Schiff bases showed violet-light emission, while their derived polyesters showed red-light emission. The poly(azomethine-ester)s indicated good thermal stability (347 °C and 561 °C) which was estimated through Tmax\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{ \hbox{max} }$$\end{document} (temperature at which rate of weight loss is maximum) value obtained from DTG (derivative thermogravimetry) graph. The synthesized compounds were also tested for their antimicrobial activities against different species of bacteria and fungi. The Schiff base having dapsone moiety showed 55% inhibition, while its derived poly(azomethine-ester) showed 40% inhibition against bacterial species Shigella flexneri.

Acta Chimica Slovenica, Sep 15, 2018

Sindh University research journal, Mar 12, 2019

International Journal of Phytoremediation, Sep 22, 2022

Arabian Journal of Geosciences

Current Analytical Chemistry, 2022

Background: Fluorescence-based sensing is considered highly sensitive and fluorescent probes with... more Background: Fluorescence-based sensing is considered highly sensitive and fluorescent probes with improved properties are always desired. Fluorescent carbon dots (CDs) are newly emerging quasi-spherical nanoparticles of less than 10 nm in size and belong to the carbon nano-material’s family. CDs have great potential as fluorescent probes and currently are under open deliberation by the researchers due to their striking properties such as low environmental hazard, high selectivity, greater sensitivity, good biocompatibility, tunable fluorescent properties and excitation dependent multicolor emission behavior. Introduction: This review demonstrates various available methods for fabrication of fluorescent CDs, capping of CDs and characterization with various techniques including UV-visible, FT-IR, and TEM. Analytical applications using CDs for the sensing of small organic molecules, specifically nitroaromatic compounds in the environmental samples are complied. Methods: The review cove...

Journal of entomology and zoology studies, 2016

The field trial wasrnconducted to determine the effects of Physio-morphological characters expres... more The field trial wasrnconducted to determine the effects of Physio-morphological characters expressedrnon leaves by application of gamma rays in cotton lines at different doses asrncompared of their parent lines which creating resistance against jassid, Amrascarndevestans. The cotton line SB* (250 Gy) was found highly resistance.rnWhereas, cotton line SP* (150 Gy) was attained highly susceptible againstrnjassid populations during 2008 and 2009, respectively. The trichomes densityrnwas showed highly significant and negative effects on jassid population inrnparent and gamma irradiated 150 Gy lines, whereas, non-significant and negativerncorrelation in irradiated 200 and 250 Gy cotton lines. While, trichomes sizernwas found non-significant and negative correlation with jassid populations inrnall parents and their irradiated with 150, 200 and 250 Gy during 2008 and 2009,rnrespectively; except the trichomes size that had a significant and negativerncorrelation on parent and 250 Gy cotton ...

International Journal of Phytoremediation, 2019