Mari Petroleum Company Ltd

Daharki, Pakistan

Mari Petroleum Company Ltd

Daharki, Pakistan

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PubMed | Anhui Medical University, University of Sichuan, Mari Petroleum Company Ltd and Guizhou Provincial Hospital
Type: Journal Article | Journal: Urology journal | Year: 2016

Strictures of the urethra are the most common cause of obstructed micturition in younger men and there is frequent recurrence after initial treatment. Currently, routine repeated dilations, including intermittent self-catheterisation (ISC) are prescribed by urologists to prevent urethral stricture recurrence. There is, however, no high level evidence available supporting the effectiveness of practicing these painful techniques. Balancing efficacy, adverse effects and costs, we hypothesize that active surveillance is a better option for preventing stricture recurrence as compared with routine repeated dilations. However, well designed, adequately powered multi-center trials with comprehensive evaluation are urgently needed to confirm our hypothesis. .


Khan M.I.,Mari Petroleum Company Ltd | Yasmin T.,University of Peshawar | Shakoor A.,University of Peshawar
Renewable and Sustainable Energy Reviews | Year: 2015

Abstract Increasing urbanization and industrialization have led to a phenomenal growth in transportation demand worldwide, coupled with a concentration of vehicles in metropolitan cities. With regard to increasingly stringent emission legislation natural gas is gaining interest as a transportation fuel with worldwide over 19 million natural gas vehicles in operation. This paper presents the worldwide background, prospects and challenges of natural gas fuel and natural gas fueled vehicles along with environmental and economic aspects of compressed natural gas as a transformation fuel. Technical aspects of compressed natural gas properties, storage, safety problems and its effect on engine performance, efficiency, emissions and barriers to natural gas vehicles adaptation are discussed in detail. The main indicators selected for the comparative assessment of natural gas as vehicular fuel are: economic, emission performance and safety aspect. The results showed that CNG has several advantages over both diesel and gasoline fuel, including considerable emission and cost reductions. © 2015 Elsevier Ltd.


Tian Y.,University of Sichuan | Tian Y.,Guizhou Provincial Peoples Hospital | Cai X.,University of Sichuan | Wazir R.,Mari Petroleum Company Ltd | And 2 more authors.
International Urology and Nephrology | Year: 2016

Objectives: To address to a better understanding of whether increased water consumption is associated with beneficial effects of urinary tract infections prophylaxis and treatment, and if so, the mechanism involved in this process. Methods: Models of the catheterized bladder were infected with Escherichia coli. Artificial urine was supplied at various flow rates and various concentrations to separately assess the “flushing effect” and “dilution effect” of increased water consumption on catheter blockage time, encrustation formation, and bacterial growth. Results: There were no statistical significances regarding catheter blockage time (P = 0.92), encrustation formation, and bacterial growth among bladder models supplied with various flow rates. When the flow rate was set as 1 ml/min, however, there showed significant decrease trend of the time to blockage (P = 0.0005), encrustation formation, and bacterial growth as the concentration of the artificial urine increased except the twofold-concentration urine group. Conclusions: Increased water consumption is associated with beneficial effects of urinary tract infection prophylaxis and treatment, and dilution effect of bacteria nutrition in the urine is at least partly involved in this process if not all, rather than the “flushing effect”. Considering the flaws and the in vitro design of the current study, however, an in vivo study is warranted. © 2016, Springer Science+Business Media Dordrecht.


Khan M.I.,Mari Petroleum Co. | Yasmin T.,University of Peshawar
Journal of Natural Gas Science and Engineering | Year: 2014

In a step towards adopting environment friendly fuel and to save foreign exchange, Compressed Natural Gas (CNG) was introduced by the Government of Pakistan in the country in 1992. Due to available price differential between CNG and gasoline/diesel and investor friendly policy and regulatory framework, CNG sector has shown tremendous growth over the last ten year in the country. This growing demand of natural gas by CNG sector, results in gas shortages in the country. This paper describes the key steps in the development of CNG as transportation fuel in Pakistan. The present scenario of the CNG industry including the natural gas vehicles (NGVs) population growth and the expansion of CNG refilling stations are discussed. Various aspects of the CNG program in Pakistan, for example environmental benefits, economic benefits and problems associated with CNG industry of Pakistan are illustrated. © 2014 Elsevier B.V.


Khan M.I.,Mari Petroleum Company Ltd | Yasmin T.,University of Peshawar | Shakoor A.,University of Peshawar
Energy Systems | Year: 2015

Environmental concerns relating to gaseous emissions from transport have led to growth in the use of compressed natural gas (CNG) as transportation fuel worldwide with over 19 million natural gas vehicles (NGVs) currently in operation. This paper reviews the environmental advantages of natural gas fuel, presenting laboratory and real world comparative emission performance of NGVs with diesel and gasoline fueled vehicles. The aim is to clarify the worldwide experience of NGVs in terms of various emission factors i.e. CO$$_{2}$$2, CO, NO$$_\mathrm{x}$$x, NMHC and PM. The paper provides a critical analysis of information collected and draws general conclusions on the world-wide NGVs experience. The results reveal that CNG in public transportation can contribute to the improvement of urban air, reduce adverse health effects and social costs of air pollution. It was observed that on a well-to-wheels basis, CNG produce less greenhouse gases as compared to conventional gasoline and diesel vehicles. The results showed that there is large variation in the resulted NMHC emission data of CNG fuel. Some studies reveal that CNG can significantly reduce NMHC emission while other concluded that CNG increase the NHMC emission. © 2015, Springer-Verlag Berlin Heidelberg.


Khan M.I.,Mari Petroleum Company Ltd | Yasmin T.,University of Peshawar
Journal of Failure Analysis and Prevention | Year: 2014

R39 AISI 1008 steel ring gasket, used as sealing element in choke valve of a gas well, suffered erosion- corrosion after being used for a relatively short time, which resulted in the leakage of gas. Scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and hardness testing were used to determine the most probable causes of the failure. The results showed that the composition and hardness of ring gasket were in accordance with the required parameters of API 6A Style R39, Class D ring gasket, and AISI 1008 steel. The composition of corrosion products were mainly Fe2O3, Fe3 O 4 and scaling layer were composed of FeCO3. The investigations indicated that failure of the ring gasket was caused by erosion-corrosion. © ASM International 2014.


PubMed | University of Sichuan and Mari Petroleum Company Ltd
Type: Journal Article | Journal: International urology and nephrology | Year: 2016

To address to a better understanding of whether increased water consumption is associated with beneficial effects of urinary tract infections prophylaxis and treatment, and if so, the mechanism involved in this process.Models of the catheterized bladder were infected with Escherichia coli. Artificial urine was supplied at various flow rates and various concentrations to separately assess the flushing effect and dilution effect of increased water consumption on catheter blockage time, encrustation formation, and bacterial growth.There were no statistical significances regarding catheter blockage time (P=0.92), encrustation formation, and bacterial growth among bladder models supplied with various flow rates. When the flow rate was set as 1ml/min, however, there showed significant decrease trend of the time to blockage (P=0.0005), encrustation formation, and bacterial growth as the concentration of the artificial urine increased except the twofold-concentration urine group.Increased water consumption is associated with beneficial effects of urinary tract infection prophylaxis and treatment, and dilution effect of bacteria nutrition in the urine is at least partly involved in this process if not all, rather than the flushing effect. Considering the flaws and the in vitro design of the current study, however, an in vivo study is warranted.

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