Papers by Muhammad Subhan
Pakistan Journal of Biological Sciences, 2007
Hydro-ethanolic crude extract of Hypericum perforatum Linn. family hypericaceae (St. John&amp... more Hydro-ethanolic crude extract of Hypericum perforatum Linn. family hypericaceae (St. John's Wort) aerial parts (Hp. Cr) was studied for its possible antinociceptive effect against acetic acid-induced abdominal constriction assay in mice. Hp. Cr (10-20 mg kg(-1)), opium (10-30 mg kg(-1)), morphine (0.75-3.0 mg kg(-1)) and aspirin (50-100 mg kg(-1)) showed dose-dependent antinociceptive effect. In animals treated with naloxone (0.5 mg kg(-1)), the antinociceptive effect of Hp. Cr was significantly reduced similar to that of opium, while effect of aspirin remained unchanged. These results suggest that the antinociceptive effect of Hypericum perforatum may be mediated through activation of opioid receptors.
Journal of Occupational and Environmental Medicine, 2003
Our objective was to study the effects of welding fumes and their duration of exposure on lung fu... more Our objective was to study the effects of welding fumes and their duration of exposure on lung function. This was a matched case-control cross-sectional study of spirometry in 50 nonsmoking manual metal arc welders who work without the benefit of welding fume control ventilation or respiratory protective devices. Welding workers, with exposures longer than 9 years, showed a significant reduction in spirometry (forced expiratory volume in one second [FEV1], FEV1/forced vital capacity [FVC%], and peak expiratory flow [PEF]) relative to controls. Lung function in nonsmoking welding workers is impaired and stratification of results shows a dose-effect of years of welding on lung function. This effect primarily shows an obstructive pattern of airways disease. Preventive measures in developing countries have to be adopted to avert long-term lung damage in welders.
The purpose of this study was to identify superior parental combinations based upon general and s... more The purpose of this study was to identify superior parental combinations based upon general and specific combining abilities in order to exploit their potential for increasing seed cotton yield. Five cotton lines ( NIAB 111, NIAB 999, CIM 448, MNH 93 & FH 901) and three testers (LRA Blight, CP 15/21 & 289 F-1) were crossed according to line × tester mating system. Data on 23 genotypes were recorded on monopodial and sympodial branches, number of bolls, boll weight, seed index and seed cotton yield. The variation due to general combining ability of the parents and specific combining ability of the hybrids for plant yield and its components were estimated by line × tester analysis. Result showed that MNH 93 was the best combiner for most of the traits studied. Variance components analysis indicated that except boll weight, all other characters were predominantly influenced by dominance properties of genes. Three varietal combinations NIAB 999 × CP 15/21, CIM 448 × LRA Blight and MNH 93 × 289 F-1 expressed high specific combining abilities for all characters. Results suggest that the parents may be used in the hybridization program aiming to develop hybrid cotton.
Chromatographia, 2011
The separation and determination of 19 amino acids were examined using two stages derivatization ... more The separation and determination of 19 amino acids were examined using two stages derivatization with trifluoroacetylacetone and ethyl chloroformate from the column HP-5 (30 m × 0.32 mm id) with film thickness 0.25 μm at an initial column temperature 100 °C for 2 min with ramping of 20 °C min−1 up to 250 °C with nitrogen flow rate of 3 mL min−1. The detection was performed by flame ionization detector. Total separation time was 10 min. The separation was repeatable with relative standard deviation (RSD) (n = 5) within 1.5–1.9 and 1.3–1.7% in terms of retention time and peak height/peak area, respectively. The method was applied for the determination of amino acids from skin samples of psoriatic patients (n = 6), arsenicosis patients (n = 5) and normal subjects (n = 9) and variation in the contents of the amino acids was noted. The RSDs for the determination were obtained within 3%.
In this study, Tragopogon L. Lactuceae (Asteraceae) collected from Pakistan has been investigated... more In this study, Tragopogon L. Lactuceae (Asteraceae) collected from Pakistan has been investigated for its morphology, leaf epidermal anatomical feature and pollen grain characteristics. It is a perennial herb. In this project 2 species i.e. Tragopogon dubius & Tragopogon gracilis are described. It was found that the basal leaves were sessile, whilst the basal, middle and upper leaf blade was linearlanceolate. Furthermore, the phyllaries were in one row in all. The middle and inner phyllaries were absent. The leaves were bifacial and stomata cells were anomotetracytic. The pollen type of the species was trizonocolporate and tetrazonocolporate. All morphological, palynological and anatomical studies are illustrated for the first time.
Ceramics International
Conventional ceramic and sol–gel auto combustion routes were adopted to develop Mn–Zn ferrite cor... more Conventional ceramic and sol–gel auto combustion routes were adopted to develop Mn–Zn ferrite cores. To control high frequency (>500kHz) losses, zirconia (0.2wt%) and calcia (0.04wt%) were added in Mn0.57Zn0.35Fe2.08O4. The results revealed that Mn–Zn ferrite smart cores synthesized by auto combustion process have superior properties than conventionally prepared cores. It is believed that the presence of unique properties such as
The relationship between breathlessness based on the visual analog scale (VAS) and expired pulmon... more The relationship between breathlessness based on the visual analog scale (VAS) and expired pulmonary ventilation (VE) has been investigated under different experimental conditions. The `Newcastle effect’ revealed for the first time that a repetitive exercise protocol over a period of ten days increased the intercept without change in the slope of VASNE relationship1. Whether experiments were conducted daily or weekly, the time course of the intercept plateaued after around 5 to 6 weeks of exercise training2. A similar effect has been shown to occur during volitional tracking of an inspiratory resistive breathing pattern2.
International Journal of Environmental Health Research, 2006
Electromyography (EMG) of respiratory muscles is a reliable method of assessing the ventilatory m... more Electromyography (EMG) of respiratory muscles is a reliable method of assessing the ventilatory muscle function, but still its use has not been fully utilized to determine the occupational and environmental hazards on respiratory muscles. Therefore, EMG of intercostal muscles was performed to determine the dose response effect of cement dust on respiratory muscles competence. Matched cross-sectional study of EMG in 50 non-smoking cement mill workers with an age range of 20 -60 years, who worked without the benefit of cement dust control ventilation or respiratory protective devices. EMG was performed by using surface electrodes and chart recorder. Significant reduction was observed in number of peaks ( p 5 0.0005), maximum peak amplitude ( p 5 0.0005), peak-to-peak amplitude ( p 5 0.0005) and duration of response ( p 5 0.0005) in cement mill workers compared to their matched control. Cement dust impairs the intercostal muscle competence and stratification of results shows a dose-effect of years of exposure in cement mill.
... 1961. Mangla watershed management study. Volume 1. General report. Report submitted to Pakist... more ... 1961. Mangla watershed management study. Volume 1. General report. Report submitted to Pakistan Water and Power Development Authority. 123 P-Masrur, Anwar and Muhammad Hanif. 1972. A study of surface runoff and sediment release in a Chirpine area. Pak. J. For. ...
Journal of Applied Sciences, 2003
Experiment of 8×8 diallel analysis was conducted on Upland cotton (Gossypium hirsutum L.) in the ... more Experiment of 8×8 diallel analysis was conducted on Upland cotton (Gossypium hirsutum L.) in the Faculty of Agriculture, Gomal University, DIKhan, Pakistan during copping season 1997-99. Sowing was managed both on Flat land and Ridges to differentiate the ...
Journal of Applied Sciences, 2003
Pakistan Journal of Applied Sciences 3 (7): 524-529, 2003 ISSN 1607-8926 © 2003 Asian Network for... more Pakistan Journal of Applied Sciences 3 (7): 524-529, 2003 ISSN 1607-8926 © 2003 Asian Network for Scientific Information Response of Rice to Different Methods of Zinc Application in Calcareous Soil M. Umar Khan, M. Qasim, M. Subhan, M. Jamil and Riazud Din Ahmad Faculty of ...
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Papers by Muhammad Subhan