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Search Results: 1 - 10 of 407263 matches for " Haji M. Shoaib Khan "
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Formulation and characterization of a multiple emulsion containing 1% L-ascorbic acid
Naveed Akhtar,Mahmood Ahmad,Haji M. Shoaib Khan,Jawad Akram
Bulletin of the Chemical Society of Ethiopia , 2010,
Abstract: The purpose of the study was to prepare a stable multiple emulsion containing a skin anti-aging agent and using paraffin oil. Vitamin C, was incorporated into the inner aqueous phase of water-in-oil-in-water (w/o/w) multiple emulsion at a concentration of 1%. Multiple emulsion was prepared by two step method. Stability studies were performed at different accelerated conditions, i.e. 8 oC (in refrigerator), 25 oC (in oven), 40 oC (in oven), and 40 oC at 75% RH (in stability cabin) for 28 days to predict the stability of formulations. Different parameters, namely pH, globule size, electrical conductivity and effect of centrifugation (simulating gravity) were determined during stability studies. Data obtained was evaluated statistically using ANOVA two way analyses and LSD tests. Multiple emulsion formulated was found to be stable at lower temperatures (i.e. 8 and 25 oC) for 28 days. No phase separation was observed in the samples during stability testing. It was found that there was no significant change (p > 0.05) in globule sizes in most of the samples kept at various conditions. Insignificant changes (p > 0.05) in both pH and conductivity values were determined for the samples kept at 8, 40, and 40 oC at 75% RH, throughout the study period. Further studies are needed to formulate more stable emulsions with other emulsifying agents.
Whitening and Antierythemic effect of a cream containing Morus alba extract
NaveedAkhtar, Jehad Hisham, Haji M. Shoaib Khan,Barkat Ali Khan*,Tariq Saeed
Hygeia : Journal for Drugs and Medicines , 2012,
Abstract: Plan: To determine the effects of a newly formulated w/o emulsion (cream) of the ethanolicextract of mulberry fruits(Morus alba) withits vehicle (Base) as control on skin melanin, skin erythema and skin moisture content.Methodology: Concentrated 4% Mulberry fruit extract was entrapped in the inner aqueous phaseof w/o emulsion. The newly formulatedbase and formulation were applied to the cheeks of undiseased human volunteersfor a period of 8 weeks. Melanin,erythema and skin moisture were monitored every week and analyzed by Mexameterand Corneometer. Statistically the results of both base and formulation werecompared by using ANOVA and Paired t test.Outcome: The baseshowed insignificant (p> 0.05) effects while the formulation showedstatistically significant (p≤0.05) decrease in melanin content. Both the baseand formulation showed insignificant (p> 0.05) effects on skin moisturecontent. Sk n erythema was significantly (p≤0.05) reduced by the formulation.This formulation of cream containing 4% concentrated extractof mulberry can be used for skin whitening as it can decrease skin melanincontent. Furthermore, the decrease in erythema showed that the cream will besafe to use and will not cause any irritation.
Formulation and characterization of a multiple emulsion containing 1% L-ascorbic acid
Naveed Akhtar, Mahmood Ahmad, Haji M. Shoaib Khan, Jawad Akram, Gulfishan Gulfishan, Ahmad Mahmood, Muhammad Uzair
Bulletin of the Chemical Society of Ethiopia , 2010,
Abstract: The purpose of the study was to prepare a stable multiple emulsion containing a skin anti-aging agent and using paraffin oil. Vitamin C, was incorporated into the inner aqueous phase of water-in-oil-in-water (w/o/w) multiple emulsion at a concentration of 1%. Multiple emulsion was prepared by two step method. Stability studies were performed at different accelerated conditions, i.e. 8 oC (in refrigerator), 25 oC (in oven), 40 oC (in oven), and 40 oC at 75% RH (in stability cabin) for 28 days to predict the stability of formulations. Different parameters, namely pH, globule size, electrical conductivity and effect of centrifugation (simulating gravity) were determined during stability studies. Data obtained was evaluated statistically using ANOVA two way analyses and LSD tests. Multiple emulsion formulated was found to be stable at lower temperatures (i.e. 8and 25 oC) for 28 days. No phase separation was observed in the samples during stability testing. It was found that there was no significant change (p > 0.05) in globule sizes in most of the samples kept at various conditions. Insignificant changes (p > 0.05) in both pH and conductivity values were determined for the samples kept at 8, 40, and 40 oC at 75% RH, throughout the study period. Further studies are needed to formulate more stable emulsions with other emulsifying agents. KEY WORDS: Multiple emulsion, Vitamin C, Stability Bull. Chem. Soc. Ethiop. 2010, 24(1), 1-10.
Assessment of Physical Stability and Antioxidant Activity of Polysiloxane Polyalkyl Polyether Copolymer-Based Creams
Atif Ali,Naveed Akhtar,Haji Muhammad Shoaib Khan
Journal of Chemistry , 2013, DOI: 10.1155/2013/938042
Abstract:
Power Efficient Scheduled-Based Medium Access Control Protocol over Wireless Sensor Networks  [PDF]
Muhammad Shoaib Khan, Abrar Alajlan, Marwah Almasri
Wireless Sensor Network (WSN) , 2016, DOI: 10.4236/wsn.2016.82002
Abstract: The flexible use of sensors has made them an attractive device to be deployed in almost every field of life such as health, military and home. Recent advancement in electronics and wireless communications has witnessed the development of low cost-sensor devices. While wireless sensor networks (WSNs) are flexible to use and less costly, they need to be more energy-efficient as they are operated by the battery. Mostly they are deployed in harsh environments where it is very difficult to change the batteries frequently. Several medium access control (MAC) algorithms have been developed for the energy-efficient acquisition of the wireless channel, however, none of them are satisfactory. In this paper, we proposed a medium access control algorithm called MAC-PE. MAC-PE is based on the concept of prioritized frames where prioritized frames are transmitted urgently. In addition, it uses scheduled-based MAC instead of accessing channel randomly. We found MAC-PE (Power-Efficient MAC) was efficient in terms of power consumption without sacrificing on the performance using NS-2.
Particulate matter (PM2.5) concentration and source apportionment in lahore
Lodhi, Arifa;Ghauri, Badar;Khan, M. Rafiq;Rahman, S.;Shafique, Shoaib;
Journal of the Brazilian Chemical Society , 2009, DOI: 10.1590/S0103-50532009001000007
Abstract: the work reported in this paper was carried out to study the trends of pm2.5 (particles with an aerodynamic diameter of 2.5 μm or less) concentrations and source apportionment of pm2.5 monitored at an urban residential site in lahore, pakistan. pm2.5 aerosol samples were collected for 2 days in a week at 12 h interval in a day, both in dry and wet seasons, on zefluortm filter papers using thermo-electron corporation reference ambient air sampler (raas). total 310 samples were collected during the period under study, i.e., from november 2005 to december 2007. high pm2.5 loads were observed in winter, which were approximately 4 times greater than those observed in the summer, spring, fall and monsoon seasons in the yearlong measurements. source apportionment was performed on short duration analysis results of november 2005 to march 2006 using positive matrix factorization (pmf) model. the results derived from pmf model indicated that the major contributors to pm2.5 in lahore are: soil/road dust, industrial emissions, vehicular emissions and secondary aerosols. it is, therefore, concluded that in addition to local vehicular and industrial emissions, the city is also affected from trans-boundary air pollutants particularly due to secondary aerosols (especially so42-) during winter which increase pm2.5 concentrations manifold when relatively less mixing height exists. the sulfate particles also facilitate in haze/fog formation during calm highly humid conditions, thus reduce visibility and increase the incidents of respiratory diseases encountered in the city every year.
PERFORATED DUODENAL ULCER
MUHAMMAD SHOAIB KHAN
The Professional Medical Journal , 2005,
Abstract: Objective: Perforated duodenal ulcer is a common surgical emergency.Controversy exists regarding simple closure of perforation or definitive surgery in emergency setting. The objective ofthe study is to see the result of simple closure of perforated duodenal ulcer followed by eradication of H. Pylori in youngsoldiers. Design: Descriptive and analytical. Place and duration of study: This study was carried out at CMHKharian/CMH Rawalpindi between Jan 1998 to June 2002. Subject and method: Fifty three young soldiers presentingwith perforated duodenal ulcer were included in the study. They were treated with simple closure of perforation followedby eradication of H. Pylori. These patients were followed up in OPD for two years. Depending upon their symptoms theywere placed in different Visick grades. Result: Six patients (11.3%) were lost in followup and excluded from the study.Out of remaining forty seven patients thirty nine patients (82.5%) remained asymptomatic and did not require furthertreatment. Four patients (8.5%) required symptomatic treatment. Three patients (6.3%) required another course ofomeprazole. One of them (2.1%) required vagotomy and gastrojejunostomy for gastric outlet obstruction. Conclusion:It was concluded that simple closure of perforation with H. Pylori eradication is a simple and safe procedure to treat thisemergency.
Bioaccumulation of Trace Elements by Different Plant Species Grown on Potentially Contaminated Soils of NWFP, Pakistan
Midrar-ul-Haq,Riaz A. Khattak,Haji Khan Puno,M. Saleem Saif
Asian Journal of Plant Sciences , 2005,
Abstract: This study was conducted in summer and winter seasons of the years 2000 and 2001 to assess the bioaccumulation of trace elements by different plant species grown on potentially contaminated soils of NWFP, Pakistan. A total of 40 effluent irrigated plant samples were collected from Amangarh Industrial Area and Pirsabak, Nowshehra (NWFP). For comparison four tubewell irrigated plant samples were also collected as background samples. The highest values of 75.0, 137.9, 982.0, 286.9, 8.3, 15.0, 73.0, 72.0 mg kg 1 were observed in effluents irrigated plant tissue and 34.2, 18.6, 120.9, 34.0, 2.6, 4.2, 16.0 and 20.0 mg kg 1 in tube well irrigated plant tissue for Zn, Cu, Fe, Mn, Cd, Cr, Ni and Pb, respectively. The values observed in this study were also compared with the toxic and excessive levels. The comparison showed that 90, 28, 43, 98 and 30% of samples contained toxic or excessive levels of Cu, Cd, Cr, Ni and Pb, respectively. The concentrations of these elements in effluent irrigated plants were higher than those in tubewell irrigated plants and also higher than those generally reported in the literature.
Toxicity of Trace Elements in Different Vegetables Grown on Potentially Contaminated Sites of the Korangi Industrial Area, Karachi Pakistan
Midrar-ul-Haq,Riaz A. Khattak,Haji Khan Puno,M. Saleem Saif
Asian Journal of Plant Sciences , 2005,
Abstract: This study presents toxicity of trace elements (Zn, Cu, Fe, Mn, Cd, Cr, Ni, Pb) in different vegetables grown on potentially contaminated sites of the Korangi Industrial Area, Karachi (Sindh) Pakistan. A total of 40 effluent irrigated and 4 tubewell irrigated considered as background samples were collected and analyzed for trace elements concentration. The maximum concentrations of trace elements absorbed by different vegetables grown on effluent irrigated soils were 78.8, 103.25, 638.8, 973.3, 7.4, 22.5, 88.0 and 64.0 mg kg-1 for Zn, Cu, Fe, Mn, Cd, Cr, Ni and Pb, respectively. However, the background plant samples showed the maximum concentrations of 32.4, 19.5, 172.5, 111.8, 1.8, 4.2, 14.8 and 12.4 mg kg-1 for the above respective elements. The values observed in this study were also compared with the toxic and excessive levels. The comparison showed that 100, 13, 18, 50, 93 and 50% of samples contained toxic or excessive levels of Cu, Mn, Cd, Cr, Ni and Pb, respectively. The concentration of trace elements in effluents irrigated plants were higher than those in tubewell irrigated plants and also higher than those generally reported in the literature.
Heavy Metals Accumulation in Potentially Contaminated Soils of NWFP
Midrar-ul-Haq,Riaz A. Khattak,Haji Khan Puno,M. Saleem Saif
Asian Journal of Plant Sciences , 2005,
Abstract: This study presents heavy metals accumulation in potentially contaminated soils of NWFP. Forty samples from each depth 0-20 and 20-40 cm were collected from soils receiving industrial effluents as irrigation water and eight samples (four samples from each depth) were collected from soils irrigated with tubewell waters considered as background soil. All the soil samples were analysed for heavy metals concentrations. The mean values of Cd, Cr, Ni and Pb in effluent irrigated soils were 0.12, 0.28, 5.64 and 6.30 mg kg-1 at 0-20 cm soil depth and 0.06, 0.18, 3.34 and 4.66 mg kg-1 in soil samples collected from 20-40 cm soil depth, respectively. However, the background soil values for Cd, Cr, Ni and Pb were 0.06, 0.12, 0.98 and 2.12 mg kg-1 at 0-20 cm soil depth and 0.04, 0.10, 0.25 and 1.66 mg kg-1 at 20-40 cm soil depth, respectively. The results showed that the concentrations of heavy metals were significantly higher in soils irrigated with effluents and the levels of these metals further increased in the surface soils as compared to sub-surface soils. The observation suggested strong impact of industrial effluents on accumulation of heavy metals in soils to levels considered above normal.
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