M A Khan - Academia.edu (original) (raw)

Papers by M A Khan

Proceedings / Indian Academy of Sciences, 1974

Changes in the physico-chemical, bacteriological and algal characteristics of raw sewage brought ... more Changes in the physico-chemical, bacteriological and algal characteristics of raw sewage brought about by inoculatingAnacystis nidulans under laboratory conditions have been studied in detail. There was a gradual increase in pH, phenolphthalein alkalinity and dissolved oxygen value. The higher the phenolphthalein alkalinity, the greater is the production of oxygen due to photosynthesis. Considerable reduction in biochemical oxygen demand was observed.

Journal of Economic Entomology, 1972

Annals of Saudi Medicine, 1994

The current study focuses on the role of livestock ownership in ensuring rural household food sec... more The current study focuses on the role of livestock ownership in ensuring rural household food security in Pakistan. For the study a comprehensive data were collected from the rice-wheat area of Pakistani Punjab. Three main districts of rice wheat area i.e. Gujranwala, Sheikhupura and Hafizabad were selected for the current study. Poisson regression analysis was carried out to estimate the determinants of livestock ownership. The impact of livestock ownership on household food security was estimated by employing the propensity score matching approach. The empirical results indicate that food security levels were higher in the range of 19-41 percent for the households having livestock ownership as compared to households having no livestock ownership. The policy implications of the study are that livestock ownership needs to be encouraged as it can help in ensuring rural household food security.

International angiology : a journal of the International Union of Angiology, 2001

Erectile dysfunction is associated with cardiovascular risk factors (e.g. hypertension, smoking, ... more Erectile dysfunction is associated with cardiovascular risk factors (e.g. hypertension, smoking, dyslipidemia and diabetes) and is more common in patients with cardiovascular disease. We therefore assessed the prevalence of two predictors of vascular events, fibrinogen and lipoprotein-a, in patients with and without erectile dysfunction. Men with erectile dysfunction (48 non-smokers, 48 smokers), aged 45-70 years, were compared with controls (21 non-smokers, 21 smokers) with normal erectile function and no known pathology. Serum total cholesterol was significantly higher in non-smokers with erectile dysfunction compared to both control non-smokers and erectile dysfunction smokers. Men with erectile dysfunction who smoked had a significantly higher plasma fibrinogen level than control smokers. Similarly, men with erectile dysfunction, who did not smoke had higher levels of plasma fibrinogen compared to both smokers and non-smokers without erectile dysfunction. No significant differen...

Cell Biology International Reports, 1988

Mini-pig prostate epithelial cells exhibited the unique metabolic characteristics associated with... more Mini-pig prostate epithelial cells exhibited the unique metabolic characteristics associated with the specialized function of production and secretion of high levels of citric acid. Epithelial cell suspensions from mini-pig prostate were successfully grown in primary and secondary cultures. The cultured epithelial cells exhibited rapid proliferation reaching confluency in approximately 6 days. Growth and proliferation of fibroblasts were markedly restricted by the dominance of epithelial cell growth. Confluent cultures could be maintained for approximately 6 weeks. The epithelial cells retained their polymorphic appearance in primary and secondary cultures and exhibited the characteristic formalin-resistant acid phosphatase reaction. Testosterone stimulated mitochondrial aspartate aminotransferase (mAAT) activity and citrate production by confluent epithelial cell cultures. These initial results indicate that cultured epithelial cells derived from mini-pig prostate might be an excellent model related to human for studies of prostate biology and hormonal regulation.

2009 IEEE International Advance Computing Conference, 2009

M Ayoub Khan, Videep Kumar Antiwal Communications Research Centre Centre for Development of Advan... more M Ayoub Khan, Videep Kumar Antiwal Communications Research Centre Centre for Development of Advanced Computing (C-DAC) Ministry of Communications and IT, Govt. of India, Noida, India {ayoub, videepkumar} @cdacnoida.in ... Abstract The Radio Frequency Identification ...

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Voprosy kurortologii, fizioterapii, i lechebnoĭ fizicheskoĭ kultury

Pakistan journal of pharmaceutical sciences, 1994

Four proteinases were isolated from the venom of a local scorpion species Isonietrus vittatus ... more 1) Four proteinases were isolated from the venom of a local scorpion species Isonietrus vittatus collected from Sindh region, Pakistan and named PRO,(IA) PRO,(IB) PRO(IVA) and PRO(IVB). 2) Successive chromatography on Sephadex G-50, CM-Cellulose and Sephadex G-100 yield 25.5 mg, 20.5 mg, 24.0 mg and 20.0 mg of PRO,(IA) PRO(IB), PRO,(IVA) and PRO(IVB) respectively. 3) The purified toxins were homogenous by gel filtration chromatography and SDS-polyacrylamide gel electrophoresis (SDS-PAGE) giving single peak and band with an apparent molecular weight of 80.0 kda, 75.5 kda, 19.0 kda and 17.0 kda by gel filtration and 81.0 kda, 74.7 kda, 18.25 kda and 17.2 kda by SDS-PAGE. 4) PRO,(IA) PRO,(IVA) and PRO(IVB) have LD(50s) of 1.27 mg/kg, 1.91 mg/kg, 1.68 and 1.70 mg/kg respectively. The former two also caused marked alteration of serum enzyme and chemical constituent levels at sublethal dose whereas PRO(IVA) and PRO(IVB) were found to be less effective. 5) Enzymatic and biological activiti...

2010 IEEE International Energy Conference, 2010

... The power coefficient depends on the blade design and the ratio of wind speed to the speed of... more ... The power coefficient depends on the blade design and the ratio of wind speed to the speed of the blade tips ... In the laboratory implementation, the inertia of the machine cannot be ignored and neither can be the impact of ... "Modeling and control of a variable-speed wind turbine ...

2011 IEEE International Electric Machines & Drives Conference (IEMDC), 2011

This paper presents a control strategy of a flywheel system to maximize the energy available on s... more This paper presents a control strategy of a flywheel system to maximize the energy available on solar panels using a Split-Pi DC-DC converter for rural applications. This new topology is mainly used in electric vehicles. The control system was designed, prototyped and tested on a flywheel system with an Axial Flux PM machine (AFPM). It showed an improvement in the

The Indian Journal of Pediatrics, 1973

... P~*r Sor ff.~per. Biol. ;~led. 91, 656. ]nani, B,M., Dabke, AT., Singh, SD and Mathur, PS (19... more ... P~*r Sor ff.~per. Biol. ;~led. 91, 656. ]nani, B,M., Dabke, AT., Singh, SD and Mathur, PS (1973). Estimation of lactic dehydrogenase activity in cerebrospinal fluid ariel in ~erum in typhoid fever with central nervo~ involvement in children. Ind,an Ped. {Under publication). King, EJ. ...

Physical Review B, 2001

We have studied optical anisotropy in Ag͑110͒ surface through interband transitions based on ener... more We have studied optical anisotropy in Ag͑110͒ surface through interband transitions based on energy bands calculated through ab initio self-consistent method of linear muffin tin orbitals. The calculated imaginary part of the dielectric constant ⑀ 2 () shows an important anisotropy between ⑀ 2 Ќ () and ⑀ 2 ʈ () for perpendicular and parallel to the surface polarization of light. Moreover, for ⑀ 2 ʈ () there is an anisotropy between ⑀ 2 x () and ⑀ 2 y () when light is polarized in ͓11 0͔ and ͓001͔ directions. This latter anisotropy has been observed experimentally. Our results explain their origin through surface, subsurface, and sub-subsurface interband transitions based on first-principles calculations.

2007 IEEE International Conference on Signal Processing and Communications, 2007

The DCT/IDCT kernels play an important role in multimedia applications and image processing. Ther... more The DCT/IDCT kernels play an important role in multimedia applications and image processing. There are several attempts to improve the execution speed of these kernels at different levels of code. The optimizations in these implementations are either aimed at reducing the number of operations, or at exploiting various features provided by modern processor architectures. In this article, we suggest a novel approach of improving the performance of such kernels through code specialization. We generate multiple specialized versions and transform them at object-code level to generate another optimized version. The experiments have been performed over IA-64 architecture with icc compiler. We are able to achieve a good speed-up of more than 2 and 1.48 for IDCT and DCT respectively for different implementations of multimedia application.

Journal of Soil Science, 1966

The saturation percentage is related to the mechanical constituents of a soil: S.P. = 578.72-4'54... more The saturation percentage is related to the mechanical constituents of a soil: S.P. = 578.72-4'54 clay %-5.40 silt %-5.56 sand %&6.89 S.P. = 38-16+0-87 clay %-0-16 sand Xf6.93 and is therefore a quantitative expression of soil texture. Profiles may be described in terms of the S.P.; thus Profile 90 10.25.40 30 45 Average profile 6I f24 textural = : or textural formula 76 60 formula 150 115-I 5 0 Maps may be drawn showing quantitative changes in texture, and associated statements of the reliability of an S.P. estimate and the probable error of the position of a textural contour be made. Decomposition of the calcium carbonate component should be avoided in routine soil survey work. trary reference standard (U.S. Dept. Agriculture Handbook No. IS, 1951; Piper, 1950). When the are unknown the soil surveyor has to rely on his own judgement andrtouch, a procedure which is both subjective and unreliable. Moreover, as the procedure is qualitative no idea of its unreliability can be obtained. It is the purpose of this show how the saturation percentage is quantitatively relate to the mechanical fractions, and how it may serve in assessing soil texture. The weight of water required to bring the given weight of soil to t 4, e rper to Methods The soil samples were collected from areas in the alluvial plain of the Lower Indus Basin during the course of soil survey work. The soils were sampled at 25 cm intervals down to IOO cm, thereafter the intervals were increased to 50 cm and the sampling continued to a depth of 200 em. The clay and silt fractions were determined by the pipette method after the removal of the soluble salts, CaCO, and CaS04 (Piper 1950). At the same time the saturation percentage was determined.

International Journal of Molecular Medical Science, 2013

Entamoeba histolytica has diverse distribution and is a substantial risk in almost all the countr... more Entamoeba histolytica has diverse distribution and is a substantial risk in almost all the countries where barrier between human feces, food and water source are ordinary. There are at least 8 different amoebas that live in the human intestinal lumen however those are generally accepted as commensals except for E. histolytica . The parasite imposes a major threat to public health in most parts of world and has re-emerged in some previously dormant areas as it is categorized as second leading cause of death from parasitic disease worldwide. In most of E. histolytica infection, symptoms remain absent or very mild whereas most frequent clinical manifestation are colitis and liver abscess due to amoebic infection. Laboratory diagnosis of amoebiasis is usually made on the basis of microscopical and serological methods Nitromidazole derivatives like metronidazole, tinidazole and ornidazole are considered as foundation stone of the treatment for amoebiasis. Lack of effective vaccination is one of the major hurdles for the control of amoebiasis that may prevent transmission of the parasite and or at least progression of the infected individuals into active invasive disease. The aim of this article is to comprehensively review the epidemiology, disease pathology and treatment of this parasitic zoonotic disease.

Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)

This paper presents the assessment and comparison of power quality problems created by common ele... more This paper presents the assessment and comparison of power quality problems created by common electronic loads. The key issues covered are reactive kVA drawn, harmonic spectrum, total harmonic distortion, power factor and displacement factor. The different loads considered in this study are commonly used electronic gadgets such as personal computer, laser printer, regulated power supply, cathode ray oscilloscope, and fluorescent

Urological Research, 1999

Dysfunction of the urinary bladder is a recognised complication of diabetes mellitus (DM) which h... more Dysfunction of the urinary bladder is a recognised complication of diabetes mellitus (DM) which has been attributed, in part, to a direct eect on bladder smooth muscle tissue. The objective of this study was to investigate the eect of alloxan-induced DM on endogenous modulators of smooth muscle tone such as cyclic AMP (cAMP), cyclic GMP (cGMP) and prostaglandins. Male New Zealand white rabbits were rendered diabetic (hyperosmolar, non-ketotic) with an i.v. injection of alloxan. After 6 months, the urinary bladders and urethrae were excised, cut into segments, incubated with stimulators and the formation of prostaglandins (PG), cAMP and cGMP measured using radioimmunoassays. PGE 2 and PGI 2 formation was impaired in response to arachidonic acid stimulation, whereas it was increased in response to acetylcholine in DM detrusor, bladder neck and urethra compared to controls. Cyclic AMP and cGMP formation in response to forskolin and sodium nitroprusside, respectively, was signi®cantly reduced in the DM tissues of the lower urinary tract compared to the control. Alterations in the formation of prostaglandins, cAMP and cGMP by the smooth muscle of DM lower urinary tract suggests that these biochemical mediators may have a pathophysiological role in the urinary bladder dysfunction associated with DM.

Tissue Antigens, 1988

We have studied HLA-A, B, C, and DR antigens in 75 unrelated white families, each with multiple c... more We have studied HLA-A, B, C, and DR antigens in 75 unrelated white families, each with multiple cases of adult-onset definite or classical rheumatoid arthritis (RA) (by ARA criteria). There was no difference in age of onset or serological features of RA between males and females. HLA-DR4 phenotype frequency among female (68%) and male (71%) patients also did not differ significantly. The observed frequencies of HLA-DR4 genotypes (homozygous, heterozygous, and those lacking it) differed significantly (p less than 0.005) between affected and unaffected individuals. However, the observed genotype distribution did not differ from what is expected given the Hardy-Weinburg equilibrium. There is a direct correlation between the number of DR4 allele(s) carried (two, one, or zero) and the percent affected (p less than 0.026 for females and p less than 0.052 for males). These findings highlight the importance of discerning the additional genetic determinants, including those that are gender-associated, which influence susceptibility to RA.

Tissue Antigens, 2008

Patients with familial and non-familial (sporadic) forms of rheumatoid arthritis (RA) were studie... more Patients with familial and non-familial (sporadic) forms of rheumatoid arthritis (RA) were studied to investigate possible HLA heterogeneity. HLA-DR4 was present in 75% of familial and 59% of sporadic RA patients. The frequency distribution of A2, B8, B27, Cw3 and DR3 differed somewhat between the two groups; however, the differences were not statistically significant in this small group of patients. Studies of a larger number of patients are indicated to explore the possibility of genetic subgroups in RA.