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Search Results: 1 - 10 of 744120 matches for " S. K. A. Rahim "
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Sensitivity and specificity of MRI and Arthroscopy in knee joint injuries
Rezaei Y,Rahim nia A,Mirmohamad S M,Vaziri K
Tehran University Medical Journal , 2007,
Abstract: Background: The knee is the most commonly injured joint. The internal components of the knee include the meniscuses, the anterior cruciate ligament (ACL) and posterior cruciate ligaments (PCL). Magnetic resonance imaging (MRI) is now used widely because of its high accuracy and noninvasiveness. Our objective was to diagnose internal knee component injuries by MRI and compare its diagnostic value with that of arthroscopic surgery."nMethods: This process research study was carried out between May 2004 and September 2006 on 90 randomly selected patients admitted to the orthopedic ward of Baghiatollah Hospital, Tehran, Iran. Each patient had arthroscopic surgery after undergoing MRI by an expert radiologist."nResults: Out of 90 patients, 81 were male and nine were female. The mean age was 31.6 years (range: 17-71). Among patients with normal ACL as shown by MRI, 42.4% were shown by arthroscopy to have a ruptured ACL. The sensitivity and specificity of MRI in ACL abnormalities were 73% and 77%, respectively. Only 1.3% of the patients with normal PCL by MRI showed PCL rupture upon arthroscopic examination. The evaluation of the lateral meniscus by MRI had a sensitivity and specificity of 40% and 94%, respectively. Likewise, in the medial meniscus, sensitivity and specificity by MRI was 70% and 98%, respectively."nConclusion: According to our study, considerable differences exist between MRI reports and arthroscopic findings in the diagnosis of internal knee injuries. We therefore conclude that sole reliance on MRI reports is not reasonable for making treatment decisions and MRI should be used as just one of the diagnostic tools, in conjunction with other methods, such as physical examination and arthroscopy.
Omega-3 Induced Change in Clinical Parameters of Rheumatoid Arthritis
S.A. Hosseini,F. Rahim,K. Mola
Journal of Medical Sciences , 2009,
Abstract: The aim of this study was showing the suppressive effect of fish oil supplementation on clinical symptom in rheumatoid arthritis. Forty two patients with Rheumatoid Arthritis (RA) entered a trial to determine the clinical and biochemical effects of dietary supplementation with fractionated fish oil fatty acids. A randomized study design with 4 and 8 week treatment periods were used. Treatment with non-steroidal anti-inflammatory drugs and with disease modifying drugs was continued throughout the study. There were significant improvement of RF (p = 0.009), ESR (p = 0.003) and serum CRP (p = 0.002) after 8 weeks fish oil supplement, but after 4 weeks the RF (p = 0.004) only showed significant improvement. This study shows that dietary fish oil supplementation is effective in suppressing clinical symptoms of rheumatoid arthritis.
Design of Stacked Microstrip Dual-band Circular Polarized Antenna
N. Zakaria,S. K. A. Rahim,T. S. Ooi,K. G. Tan
Radioengineering , 2012,
Abstract: This study introduces a new design of dual-band circular polarized (CP) microstrip antenna for ISM band applications (2.45 GHz and 5.8 GHz). The proposed dual-band CP microstrip antenna with compact design has achieved design intention of having return loss of < 10 dB and axial ratio of < 3 dB for both frequencies of 2.45 GHz and 5.8 GHz. The antenna has been successfully designed, fabricated, simulated, and measured and it shows the advantages of good dual-band and CP performances. Thus, the obtained results confirm satisfactory performance and good agreement.
Journal of Sustainability Science and Management , 2011,
Abstract: Razor clam or ‘ambal’ is a highly-priced bivalve collected as food source from several intertidal areas located in western Sarawak, which currently is an unregulated fishery. This study monitored the reproductive cycle of razor clam, Solen regularis, collected from the intertidal beaches of Asajaya Laut and Buntal using gonadal condition index (GCI). Sampling was performed at a two-weeks interval or monthly for two years from March 2007 to February 2009. A total of 30 specimens were dissected per sampling. The male gonads appeared beige in colour while female gonads were whitish. Throughout the study, the mean GCI ranged from 0.000 (± 0.000) to 0.247 (± 0.077) at Asajaya Laut and 0.000 (± 0.000) to 0.253 (± 0.079) at Buntal. Based on the mean GCI pattern, it is concluded that this razor clams has five stages of reproductive cycle as follows; i) gonadal development, ii) maturation, iii) spawning, iv) spent, and v) resting period. Spawning period for both sites was similar, from end of March-April to September and followed by a short spent stage from end of September-October to November and a resting period from end of October-November to January in the following year. The results obtained in this study could provide important knowledge in determining the spawning season which will benefit razor clam fishery for sustainable management and potential species for aquaculture in future.
A Dual-Band Circularly-Polarized Patch Antenna with a Novel Asymmetric Slot for WiMAX Application
S. M. Noghabei,S. K. A. Rahim,P. J. Soh,M. Abedian
Radioengineering , 2013,
Abstract: A compact design of a circularly-polarized (CP) microstrip antenna to achieve dual-band behavior for WiMAX applications is presented. A single-layered feed is used to excite a single square patch integrated with a novel asymmetrical slot and two different truncated corners to achieve CP polarization in both bands. Besides its structural simplicity, ease of fabrication and low-cost, the proposed antenna features a satisfactory impedance bandwidth of 7.2 % in the lower band (2.53 GHz) and 3.6 % in the upper band (5.73 GHz). The measured radiation pattern of the proposed antenna demonstrates directional patterns in both E- and H-planes with a 3 dB axial ratio of 2 % and 3.2 % in the lower and upper band, respectively.
Immuno-modulatory and Growth-inhibitory Effects of Mycotoxins (Aflatoxin B1) in Broiler Chickens and the Reversal Influence of Hydrated Sodium Calcium Aluminosilicate
M. Rahim,M. Siddique,S.T.A.K. Sindhu,Mirza Ali Khan
Pakistan Journal of Biological Sciences , 1999,
Abstract: Eighty, day-old broiler chicks were primed with live ND and IBD vaccines at 7 and 9 days of age and boosted at the age of 21 and 28 days, respectively. At 3 weeks of age, chicks were divided into 5 equal groups A, B, C, D and E. Groups A, B and C were fed on aflatoxin contaminated feed and 1, 2 and 3 g of Hydrated Sodium Calcium Alumino Silicate (HSCAS)/kg of feed respectively. Group D was raised on contaminated feed without binder (positive control) and group E on normal feed without binder (negative control) for a period of four weeks. Maximum body weight gain was observed in group E and minimum in group D. There was a dose related increase in the weight gains of groups A, B and C. The minimum HI titres against NDV were found in group D and maximum in group E. The gradually increasing dosage of the binder in the feed of groups A, B and C manifested a dose related increase in HI antibody titres. Maximum IHA titres against IBD were found in group E and minimum in group D. Groups A, B and C also manifested a dose related increase in IHA titres against IBD. The mortality recorded in groups A, B, C, D and E was 31.25, 18.75, 18.75, 43.75 and 0.0 per cent, respectively. Mycotoxin-binder at the rate of 3 g/kg of feed gave better results in terms of body weight gain, humoral immune response and better protection against aflatoxicosis compared to the dose rates of 1 and 2 g/kg of feed.
Wideband P-Shaped Dielectric Resonator Antenna
Radioengineering , 2013,
Abstract: A novel P-shaped dielectric resonator antenna (DRA) is presented and investigated for wideband wireless application. By using P-shaped resonator, a wideband impedance bandwidth of 80% from 3.5 to 8.2 GHz is achieved. The antenna covers all of wireless systems like C-band, 5.2, 5.5 and 5.8 GHz-WLAN and WiMax. The proposed antenna has a low profile and the thickness of the resonator is only 5.12 mm, which is 0.06-0.14 free space wavelength. A parametric study is presented. The proposed DRA is built and the characteristics of the antenna are measured. Very good agreement between numerical and measured results is obtained.
Mouse Nkrp1-Clr Gene Cluster Sequence and Expression Analyses Reveal Conservation of Tissue-Specific MHC-Independent Immunosurveillance
Qiang Zhang, Mir Munir A. Rahim, David S. J. Allan, Megan M. Tu, Simon Belanger, Elias Abou-Samra, Jaehun Ma, Harman S. Sekhon, Todd Fairhead, Haggag S. Zein, James R. Carlyle, Stephen K. Anderson, Andrew P. Makrigiannis
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0050561
Abstract: The Nkrp1 (Klrb1)-Clr (Clec2) genes encode a receptor-ligand system utilized by NK cells as an MHC-independent immunosurveillance strategy for innate immune responses. The related Ly49 family of MHC-I receptors displays extreme allelic polymorphism and haplotype plasticity. In contrast, previous BAC-mapping and aCGH studies in the mouse suggest the neighboring and related Nkrp1-Clr cluster is evolutionarily stable. To definitively compare the relative evolutionary rate of Nkrp1-Clr vs. Ly49 gene clusters, the Nkrp1-Clr gene clusters from two Ly49 haplotype-disparate inbred mouse strains, BALB/c and 129S6, were sequenced. Both Nkrp1-Clr gene cluster sequences are highly similar to the C57BL/6 reference sequence, displaying the same gene numbers and order, complete pseudogenes, and gene fragments. The Nkrp1-Clr clusters contain a strikingly dissimilar proportion of repetitive elements compared to the Ly49 clusters, suggesting that certain elements may be partly responsible for the highly disparate Ly49 vs. Nkrp1 evolutionary rate. Focused allelic polymorphisms were found within the Nkrp1b/d (Klrb1b), Nkrp1c (Klrb1c), and Clr-c (Clec2f) genes, suggestive of possible immune selection. Cell-type specific transcription of Nkrp1-Clr genes in a large panel of tissues/organs was determined. Clr-b (Clec2d) and Clr-g (Clec2i) showed wide expression, while other Clr genes showed more tissue-specific expression patterns. In situ hybridization revealed specific expression of various members of the Clr family in leukocytes/hematopoietic cells of immune organs, various tissue-restricted epithelial cells (including intestinal, kidney tubular, lung, and corneal progenitor epithelial cells), as well as myocytes. In summary, the Nkrp1-Clr gene cluster appears to evolve more slowly relative to the related Ly49 cluster, and likely regulates innate immunosurveillance in a tissue-specific manner.
Frequency Shift in Tracking the Damage of Fixed Offshore Structures
S. Abdul Rahim,A.J. Hillis
Journal of Applied Sciences , 2011,
Abstract: This study investigates a method of detecting and tracking damage in an offshore platform located in the North Sea under the excitation of a typical sea storm by performing a finite element simulation. A modal analysis and nodal displacement results from Finite Element (FE) simulation are adopted for analysing the dynamic characteristics of this platform. For this purpose, the JONSWAP spectrum and Morison equation are applied to simulate the typical wave force in the North Sea using Matlab and Simulink programmes. The associated mode shape vector obtained in modal analysis was correlated with the sea force vector which was the forcing function (force per unit length) to the structure. The determination of the dynamic response with realization to the real scenario was established by introducing some reduction of material stiffness in one of the diagonal member in stages. The results in time-displacement domain obtained from FE simulation were converted into time-acceleration domain before they were analysed in frequency spectrum using Power Spectrum Density in Matlab. The frequency analysis showed that there was a significant shift in peak frequency between the intact and damaged structure response with 30% stiffness reduction, provided that the sea force applied is in the direction of the damaged beam member orientation. This suggested that the shift in the natural frequencies of the dynamic response can provide a useful tool in monitoring the dynamic response and tracking the progression of fatigue failure of the structure.
Chromosomal aberrations and nucleic acids systems affected by some Egyptian medicinal plants used in treating female pregnant diabetic rats  [PDF]
Halima S . Abdou, Sherifa H. Salah, Amira Abd El Raouf, E.A. Abdel-Rahim
American Journal of Molecular Biology (AJMB) , 2011, DOI: 10.4236/ajmb.2011.11004
Abstract: The influences of medicinal plants Juniperus Phoenicea (Araar), Hyphaene thebaica (Doum), An-astatica hierochuntica (Kafta) and Cleome droserifolia (Sammo) as antidiabetic agents were investigated using female pregnant albino rats. Female rats were injected with 60 mg/kg b.w. alloxan to induce diabe-tes. Diabetic rats treated orally with the methanol extracts of tested plants till the 19 day of gestation. The present studies include the frequencies of chro-mosomal aberrations and nucleic acid system of liver in the female pregnant rats and their embryos. The results showed that injection of alloxan caused highly significant increase in chromosomal aberrations as well as in blood glucose levels as a result of diabetes in pregnant females. It also caused a high incidence of chromosomal deviation in embryos and decreased the liver soluble protein contents of female rats and their embryos. These effects in alloxanized animals were treated and improved by ingestion of the methanol extracts of the tested plants (Araar, Doum, Kafta and Somma) in which under their treatments, the inceased level of blood glu-cose of diabetic rats was deceased. Ingestion with the plants methanolic extracts improved and normalized the effects of diabetes in nucleic acids values of liver tissues. These were accompanied with nucleases (RNAase and DNAase) activities. The inhibited ac-tivities of both DNA ase and RNA ase of pregnant rats and their embryos were stimulated and read-justed around the normal values. Also administration of the plants methanol extracts decreased the per-centage of chromosomal aberrations in the female rats and embryos. It is concluded that there are some biochemical dynamics which might occur in the metabo-lism of glucose, nucleic acids and proteins in order to prevent or to reduce the oxidative stress of diabetes by flavonoides treatment.
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