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Search Results: 1 - 10 of 407012 matches for " M. Tanweer Khan "
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Antioxidants Keep the Potentially Probiotic but Highly Oxygen-Sensitive Human Gut Bacterium Faecalibacterium prausnitzii Alive at Ambient Air
M. Tanweer Khan, Jan Maarten van Dijl, Hermie J. M. Harmsen
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0096097
Abstract: The beneficial human gut microbe Faecalibacterium prausnitzii is a ‘probiotic of the future’ since it produces high amounts of butyrate and anti-inflammatory compounds. However, this bacterium is highly oxygen-senstive, making it notoriously difficult to cultivate and preserve. This has so far precluded its clinical application in the treatment of patients with inflammatory bowel diseases. The present studies were therefore aimed at developing a strategy to keep F. prausnitzii alive at ambient air. Our previous research showed that F. prausnitzii can survive in moderately oxygenized environments like the gut mucosa by transfer of electrons to oxygen. For this purpose, the bacterium exploits extracellular antioxidants, such as riboflavin and cysteine, that are abundantly present in the gut. We therefore tested to what extent these antioxidants can sustain the viability of F. prausnitzii at ambient air. The present results show that cysteine can facilitate the survival of F. prausnitzii upon exposure to air, and that this effect is significantly enhanced the by addition of riboflavin and the cryoprotectant inulin. The highly oxygen-sensitive gut bacterium F. prausnitzii can be kept alive at ambient air for 24 h when formulated with the antioxidants cysteine and riboflavin plus the cryoprotectant inulin. Improved formulations were obtained by addition of the bulking agents corn starch and wheat bran. Our present findings pave the way towards the biomedical exploitation of F. prausnitzii in redox-based therapeutics for treatment of dysbiosis-related inflammatory disorders of the human gut.
Kamili Srinivas,Tanweer Khan,Ganti Siva
International Journal on Computer Science and Engineering , 2010,
Abstract: This article discusses the challenges in managing UNDO data and several practical approaches one might follow while analyzing and resolving UNDO issues. The most frequent UNDO error: ORA-01555 snapshot-too-olderror is dealt in detail and the practical resolution which is presented might help in resolving most of the problems while managing UNDO information
Strategic Roadmap for the Analysis of Environmental Complexities in the Textile Sector of Pakistan
Abdul Majid,Muhammad Yasir and M. Tanweer Abdullah
Asian Journal of Business Management , 2010,
Abstract: This study examines the state of environmental complexity in the context of the developing countries as a fundamental part of organizational change and development. It reviews the available literature to analyze the different viewpoints and arguments to provide a rationale for understanding environmental complexity. This study then leads onto a discussion of potential challenges faced by the textile sector of Pakistan. The study focuses on two types of environmental complexities related to the textile sector, which is currently the largest manufacturing sector in Pakistan. This study suggests that environmental analysis is a prerequisite for understanding the external environment in which general and international are the two important dimensions. To understand these complexities, this study suggests: recognition of the context of the developing countries; identification of the complex variables for understanding their effects on organization; and a study of the relationship of variables of general and international environment.
Tuberculous Pyonephrosis Involving Duplex Kidney: First Reported Case
Tanweer A.N. Bhatty,Ahmed M. Alkhayat
The Scientific World Journal , 2004, DOI: 10.1100/tsw.2004.205
Structural and Electrical Characterization of Sintered Silicon Nitride Ceramic  [PDF]
Imran Khan, M. Zulfequar
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.27102
Abstract: The electrical conduction phenomena, dielectric response and microstructure have been discussed in sintered silicon nitride ceramics at different temperature and frequencies. Microstructure and phase of the sintered samples was investigated by Scanning Electron Microscope (SEM) and X-ray diffractometer (XRD). The electrical conductivity, dielectric constant and dielectric loss increases exponentially with temperature greater than 600 K. The dielectric constant and loss have been measured in the frequency range 100 Hz to 1 MHz. The a.c. conduction studies in the audio frequency range 500 Hz to 1 MHz indicates that the conduction may be due to the electronic hopping mechanism. Silicon Nitride ceramics became dense after sintering. The effect of grain size and role of phase on electrical and dielectric properties have been discussed. These types of samples can be used as a high temperature semi conducting materials for device packaging.
Modified Double Zeta Function and Its Properties  [PDF]
Arif M. Khan
Advances in Pure Mathematics (APM) , 2016, DOI: 10.4236/apm.2016.63013
Abstract: The present paper aims at introducing and investigating a new class of generalized double zeta function i.e. modified double zeta function which involves the Riemann, Hurwitz, Hurwitz-Lerch, Barnes double zeta function and Bin-Saad generalized double zeta function as particular cases. The results are obtained by suitably applying Riemann-Liouville type and Tremblay fractional integral and differential operators. We derive the expansion formula for the proposed function with some of its properties via fractional operators and discuss the link with known results.
Growth and Physiological Attributes of Tomato (Lycopersicon esculentum Mill.) Genotypes as Affected by NaCl Stress  [PDF]
M. Nasir Khan
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.73039
Abstract: High level of salinity adversely affects growth, productivity as well as quality of vegetable crops by reducing photosynthetic capacity, enzyme activities, and by enhanced production of reactive oxygen species (ROS). These ROS cause peroxidation of membrane lipids leading to disintegration of cell membrane with the leakage of electrolytes. All these detrimental effects ultimately contribute to the crop with reduced yield and low nutritive value. The present investigation was carried out to test salt tolerance capacity of ten genotypes of tomato on the basis of growth, physiological and biochemical characteristics. The results show that all the ten tested genotypes of tomato responded differently to 200 mM NaCl stress. Regarding growth parameters, BL-1076 gave higher values, while Queen gave the lowest values for most of the parameters (plant height, number of leaves, leaf area, shoot and root fresh weight and dry weight). Regarding physiological and biochemical parameters, BL-1076 gave higher values for the activities of carbonic anhydrase and nitrate reductase, leaf chlorophyll content, relative water content, and activities of antioxidant enzymes (superoxide dismutase, peroxidase and catalase). However, genotype Queen gave the lowest values for these parameters. On contrary, the least membrane damage (TBARS content) was registered in BL-1076, while the highest in Queen. Overall assessment of results leads to the conclusion that the genotype BL-1076 was found salt tolerant while Queen salt sensitive. The ten genotypes may be arranged on the basis of their salt tolerance capacity in decreasing order as: BL-1076 > Trust > Imperial > Tanshet star > PakmoreVF > L 26 > Plitz > Bonus F1 > Grace > Queen.
Small Angle Neutron Scattering and X-Ray Diffraction Studies of Nanocrystalline Titanium Dioxide  [PDF]
M. Nasir Khan, J. Bashir
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.29115
Abstract: Nanocrystalline titanium dioxide powder is characterized for phase analysis as well as particle size and its distribution by x-ray diffraction and small angle neutron scattering measurements. Analysis of the SANS data in the momentum transfer range q = 0.1 - 1.8 nm–1 reveals an average particle size of 24.82 nm in good agreement with the particle size determined earlier by transmission electron microscopy. XRD measurement proves co-existence of rutile and anatase phases in this commercial TiO2 nanocrystalline powder.
An unusual case of penetrating head injury in a child
Karim Tanweer,Topno Margaret
Journal of Emergencies, Trauma and Shock , 2010,
Abstract: Penetrating head injuries can be the result of numerous intentional or unintentional events, including missile wounds, stab wounds, and motor vehicle or occupational accidents (nails, screw-drivers). Penetrating head injuries in children constitute only a small part of the total number of traumatic head injuries seen in casualty. We report a case of neuro-trauma who was operated in our institution. Patient, 4 years male presented in casualty on 15/01/09 with a iron rod penetrating into the skull.
Bedside sonography to diagnose bladder trauma in the emergency department
Karim Tanweer,Topno Margaret
Journal of Emergencies, Trauma and Shock , 2010,
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