ALTAF KHAN - Academia.edu (original) (raw)

Papers by ALTAF KHAN

IEEE International Conference on Plasma Science, 1998

Summary form only given. Microwave cavity coupled plasma sources in various geometrical configura... more Summary form only given. Microwave cavity coupled plasma sources in various geometrical configurations have been extensively experimentally evaluated for quite a some time in a quest for an optimum performance. In sequel, a compact cylindrical plasma source with 8.9 cm inner diameter microwave cavity supporting TE111 mode has been designed and evaluated by L. Mahoney at MSU. Early investigations were

Rice bran oil – palm olein oil blend may attenuate the risk of cardiovascular diseases: results o... more Rice bran oil – palm olein oil blend may attenuate the risk of cardiovascular diseases: results of an in vivo study. Quality and quantify of dietary fats have long been recognized to play a crucial role in several metabolic disorders such as cancer, coronary heart disease, diabetes, obesity and hypertension. It influences serum lipid profile, which normally should have low cholesterol, low triglycerides, low LDL-cholesterol and a high HDL-cholesterol. Ideally, SFA, MUFA and PUFA in diet should not exceed 8-10%, 10-20%, and 10%, respectively. The oil and its blend with such a fatty acid profile, which is virtually non-existent in nature, are expected to have health benefits. We have been able to prepare a binary oil blend with a fatty acid profile quite close to the recommended one, using rice bran oil and palm oil. Serum lipid profile and retinols of rats fed with this blend (called Blend-RP) was studied to evaluate the effect of the blend on parameters associated with the risk of c...

The rhizomes of Nardostachys jatamansi (family Valerianaceae) have been used in oriental traditio... more The rhizomes of Nardostachys jatamansi (family Valerianaceae) have been used in oriental traditional medicines (Ayurveda and Unani) for the treatment of various ailments. In the present study, a 50% ethanolic extract of the rhizomes of N. jatamansi (at a dose of 800 mg/kg body weight, daily) is shown the marked reversal effect on thioacetamide induced liver cirrhosis in experimental animal model. Liver cirrhosis was characterized biochemically by measuring the activity level of -glutamyl transpeptidase, alkaline phosphatase and other biochemical parameters reported to change in cirrhosis. When compared to the group of rats having cirrhosis, test extract treated group showed significant decrease in the level of gamma -glutamyl transpeptidase, alkaline phosphatase, lipid peroxidation, glutathione-s-transferase and xanthine oxidase. An improvement in the activity level of glutathione reductase, and glutathione peroxidase was also observed. Tripeptide antioxidant reduced glutathione le...

Internet Journal of Neurology

Background: Wake-up Stroke (WUS) doesn't have distinctive clinical characteristics. Physiolog... more Background: Wake-up Stroke (WUS) doesn't have distinctive clinical characteristics. Physiological changes in circadian rhythm (cerebral autoregulation, vascular tone, blood pressure, coagulation profile) are thought to predispose to WUS. Aim: Our objective is to identify the characteristics WUS amongst the Arab population. Methods: We retrospectively assessed consecutive stroke patients of the Acute Stroke Unit of King Fahad Medical City; Riyadh, Kingdom of Saudi Arabia, presenting within five days of symptom onset from November 2010 to August 2012. The patient's demographics, risk factors, stroke volumes (ABC/2 method), location, etiology (TOAST criteria), and functional status (NIHSS, BI, GOS score) were assessed. WUS was grouped into Group A (0:00-06:00), B (06:01-12:00), C (12:01-23:59) based on the "wake up" time. Statistical analysis was done using SAS version 9.2. Results: Of 236 patients fulfilling the criteria 219 had an ischemic stroke. Of those, 65(29.7%...

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La Clinica terapeutica, Jan 31, 1980

Nuclear Instruments and Methods, 1981

... A typical X-ray spectrum of a freeze dried blood sample is shown in fig. 5 along with the con... more ... A typical X-ray spectrum of a freeze dried blood sample is shown in fig. 5 along with the concentrations of the elements detected. In order to test the correctness of the procedure, a number of blood samples were analyzed for Zn by PIXE and spectrophotometric methods. ...

Nuclear Instruments and Methods, 1979

... ANALYSIS OF LIQUIDS BY EXTERNAL BEAM PIXE DOWN TO PPB LEVEL* AH KHAN, M. KHALIQUZZAMAN, M. HU... more ... ANALYSIS OF LIQUIDS BY EXTERNAL BEAM PIXE DOWN TO PPB LEVEL* AH KHAN, M. KHALIQUZZAMAN, M. HUSAIN and M. ABDULLAH Atomic Energy ... of the method can reach the ppb level 1. Introduction In recent years, the use of proton-induced X-ray emission (PIXE ...

Journal of environmental biology / Academy of Environmental Biology, India, 2006

Automobiles, construction, festivals, factories, stations, diesel shades, garages and workshops a... more Automobiles, construction, festivals, factories, stations, diesel shades, garages and workshops are sources of noise. Vehicles are increasing enormously beyond the carrying capacity of the road. Study was carried out at 12 locations with sound level meter to assess day time and night time noise levels of Lucknow city. In residential areas, noise ranged between 67.7 to 78.9 and 52.9 to 56.4; in commercial cum traffic areas 74.8 to 84.2 and 68.2 to 74.9 and in industrial areas 76.9-77.2 and 72.2-73.1 dB(A) during day and night time respectively. Values were higher than their prescribed standards which may pose a significant impact on quality of life.

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996

Thin film samples of CuInSe2 commonly referred to as CIS produced by vacuum deposition have been ... more Thin film samples of CuInSe2 commonly referred to as CIS produced by vacuum deposition have been studied using the PIXE method. It is observed that there are substantial matrix dependent effects on X-ray yields even at thickness less than 500 μg/cm2. It is necessary ...

$Research paper thumbnail of Does MRI help in retaining potency in fracture penis?$

International Journal of Biomedical Research, 2014

Introduction: Penile fracture is a rare but urological emergency which requires expediate surgica... more Introduction: Penile fracture is a rare but urological emergency which requires expediate surgical treatment for restorement of potency. This condition remains under-reported due to ethical and psychological reasons. Diagnosis of penile fracture is mainly based on clinical features. MRI of the penis is an expensive test that is not always superior to clinical examination or ultrasound. However, it shows many of the important structures and in particular the high-resolution T (2) sequences show the glans, corpora and the tunica albuginea well. Our aim was to review whether MRI helped in early diagnosis and thereby helping in restoring potency. Material and methods: From May 2009 to October 2013, 6 patients with fracture penis were treated at our institute. Mean age of patients was 32.83 years, range from 24 to 43. All the patients presented after 6 hours of injury. Results: Patients who presented early had good IIEF score at three months compared to those who presented late. MRI helped in diagnosing the fracture in two cases, which would have otherwise been treated conservatively. Conclusions: Rupture of the corpus cavernosum is a rare condition and is generally diagnosed by clinical findings. Emergency surgical exploration and treatment is the best guarantee of good functional and cosmetic result.

$Research paper thumbnail of RCC masquerading as fracture of humerus$

International Journal of Biomedical Research, 2013

Renal cell carcinoma is 2 nd most common of genito urinary malignancies. With the advent of radio... more Renal cell carcinoma is 2 nd most common of genito urinary malignancies. With the advent of radiological imaging the presenting triad of fever, haematuria and abdominal mass is rarely seen. Osseous metastases of renal cell carcinoma (RCC) are the second most frequent location after lung metastases. They rarely present as isolated location. We present here a case of Renal Cell Carcinoma presenting as fracture of right humerus.

JPMA. The Journal of the Pakistan Medical Association, 2010

To evaluate the relation between the knowledge of mothers about EPI vaccinations and their infant... more To evaluate the relation between the knowledge of mothers about EPI vaccinations and their infant's coverage. Effect of other socio-demographic variables on mothers' knowledge and child's coverage was also assessed. A cross-sectional survey was conducted, utilizing World Health Organization's thirty-cluster sampling strategy. All households with at least one infant were considered eligible. After obtaining verbal consent, the mother was interviewed to assess her knowledge and attitudes towards EPI vaccination. Infant's coverage status was verified by checking EPI card or verbal inquiry. A knowledge score was developed by summing all correct answers. A total of 210 mothers (7 per cluster) were identified and interviewed. The number and proportion of mothers correctly identifying the seven EPI diseases were as follows; Tuberculosis 57 (27.1%), Diphtheria 53 (25.2%), Pertussis 71 (33.8%), Tetanus 70 (33.3%), Measles 85 (40.5%), Polio 91 (43.3%) and Hepatitis B 65 (3...

IOSR Journal of Applied Chemistry, 2013

The present study aims to understand the severity of Arsenic contamination along with the hydroch... more The present study aims to understand the severity of Arsenic contamination along with the hydrochemistry of ground water in Lakhimpur Kheri, one of the largest districts in Uttar Pradesh, India. Ground water samples collected from 102 handpumps from 15 blocks were analyzed for physicochemical parameters and Arsenic. The groundwater quality data were analysed statistically. The characteristic features of groundwater indicated the presence of As (0-0.224 mg/L),

Optical Elastography and Tissue Biomechanics, 2014

Urology Annals, 2014

Transurethral resection of the prostate has been reported to represent more than 30% of the workl... more Transurethral resection of the prostate has been reported to represent more than 30% of the workload of urologists and remains the dominant major procedure performed by urologists. A number of methods of treatment of bladder outflow obstruction have been proposed over the years, but transurethral prostatectomy remains the standard by which all others must be judged. [1] Open prostatectomy (OP) and monopolar TURP are still the procedures utilized by most urologists, however, laser therapy is emerging as a commonly used technique. [2] In recent years further developments in the surgical treatment of bladder outlet obstruction have been developed, which include laser enucleation, transurethral vaporization, bipolar TURP, [3] transrectal high intensity focused ultrasound and transurethral microwave thermotherapy. These new methods of treatment of bladder outlet obstruction have attempted to reduce morbidity and length of stay associated with traditional transurethral resection of the prostate. Meta-analysis comparing HoLEP with both OP and transurethral resection Introduction: Benign prostatic hyperplasia is a common disease accounting for 30% of our OPD cases and about 25% of our surgery cases. Various treatment options are now available for more efficient care and early return to work. We wanted to determine the safety and feasibility of day care monopolar transurethral resection of prostate (m-TURP), by admitting the patients on the day of surgery and discharging the patient without catheter on the same day. We also compared the morbidity associated with conventional TURP where in the catheter is removed after 24-48 h of surgery and day care TURP where in the catheter is removed on the day of surgery. Materials and Methods: A total of 120 patients who fulfilled the criteria were included in the study which was conducted between November 2008 and December 2010. A total of 60 patients were assigned for day care and 60 for conventional monopolar TURP. There was no significant difference in age, prostatic volume or IPSS score. Day care patients were admitted on day of surgery and discharged the same day after the removal of catheter. Results: Both the groups were comparable in outcome. Stricture rate was less with day care TURP. Mean catheterization time was similar to laser TURP. Conclusion: Monopolar TURP is still the gold standard of care for BPH. If cases are selected properly and surgery performed diligently it remains the option of choice for small and medium sized glands and patients can be back to routine work early.

Volume 3B: Biomedical and Biotechnology Engineering, 2013

Elastography techniques are being developed to diagnose and monitor the progression and treatment... more Elastography techniques are being developed to diagnose and monitor the progression and treatment of diseases that correlate with changes in soft tissue stiffness. The objective of this paper is to outline the application of vibrations to the human cornea in order to reconstruct a stiffness map. Having a localized stiffness map is useful for early diagnosis of cornea related diseases such as glaucoma and keratoconus. Experimental data was collected by directly vibrating the excised cornea axisymetrically along the edge and measuring wave propagation inward with the use of laser vibrometry. Different methods have been implemented to increase the reflectivity of the cornea for laser vibrometry. To corroborate the data, as well as to test feasibility, experiments have been done on phantoms constructed from silicone-based polymers. To reconstruct the data into a stiffness map, an appropriate analytical model has to be derived. This paper outlines the derivation of the analytical model for the cornea starting with simple circular plates and moving towards the curved geometry of the cornea. To verify the analytical model, finite element simulations were used to replicate the results. These results have also been checked against experimental data to help determine any external variables that affect results. Overall, the feasibility and application of a process has been determined. Future goals include increasing in-vivo application to make the process safe and cost-effective.

Zentralblatt für Bakteriologie, 1989

Different serovars of Listeria monocytogenes grew well in a chemically defined medium. Sixteen am... more Different serovars of Listeria monocytogenes grew well in a chemically defined medium. Sixteen amino acids were tested for the growth of L. monocytogenes. Most strains required cystine, valine, isoleucine, and leucine. Phenylalanine was a stimulatory growth factor for all six strains of Listeria. Whilst tryptophan was essentially required by NCTC 7973, LM and C-286 and stimulatory for 4155 and C-294, none of the strains did exhibit requirements of asparagine, glutamine, proline, histidine and tyrosine as essential/stimulatory growth factor.

Journal of environmental biology / Academy of Environmental Biology, India, 2010

The present study deals with the quantitative effect of vehicular emission on ambient air quality... more The present study deals with the quantitative effect of vehicular emission on ambient air quality during May 2006 in urban area of Lucknow city. In this study SPM, RSPM, SO2, NOx and 7 trace metals associated with RSPM were estimated at 10 representative locations in urban area and one village area for control. Beside this, air quality index (AQI), health effects of different metals and mortality were assessed. The 24 hr average concentration of SPM, RSPM, SO2 and NOx was found to be 382.3, 171.5, 24.3 and 33.8 microg m(-3) respectively in urban area and these concentrations were found to be significantly (p < 0.01) higher by 94.8, 134.8, 107.4 and 129.6% than control site respectively The 24 hr mean of SPM and RSPM at each location of urban area were found to be higher than prescribed limit of National Ambient Air Quality Standard (NAAQS) except SPM for industrial area. The 24 hr mean concentration of metals associated with RSPM was found to be higher than the control site by 52...