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Search Results: 1 - 10 of 401585 matches for " M.M. Zaki "
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Fatal Aspergillosis in an Ostrich (Struthio camelus) Predisposed by Pulmonary Haemangioma in the Kingdom of Saudi Arabia
M.S. Shathele,A. Fadlelmula,F.A. Al-Hizab,M.M. Zaki
International Journal of Zoological Research , 2009,
Abstract: A laboratory study was carried out to investigate fatal aspergillosis in an ostrich (Struthio camelus) predisposed by pulmonary haemangioma in the Kingdom of Saudi Arabia. The examination of Post Mortem (PM) revealed numerous ulcerated (1x0.5 cm) subcutaneous opaque thick masses with turbid materials (exudates) in the cut section together with fibrosis in between air sacs and the thoracic wall. The microscopic appearance indicated the presence of capillary type haemangioma in ostrich. The proliferating cells were highly differentiated, uniform with spindle-shaped nuclei resembling normal vascular endothelia and were arranged in the form of numerous capillaries distended with large amounts of blood erythrocytes and separated by fibrous stroma. However, large vascular spaces lined by a single layer of endothelium were also observed. The superficial parts of the tumour showed hyperkeratosis of the epidermis and diffuse infiltration of lymphocytes in the interstitial areas. In addition, the fibrous stroma was more abundant and dense with more prominent collagen in the peripheral parts of the tumour. On PM, the tiny yellowish white foci were detected on the lungs specimens and yielded A. fumigatus in pure culture. The histopathologic examination of the lesions showed fungal hyphae, inflammatory and multinucleate giant cells.
Use of Habek Mint (Mentha longifolia) in Broiler Chicken Diets
A.S. Al-Ankari,M.M. Zaki,S.I. Al-Sultan
International Journal of Poultry Science , 2004,
Abstract: An attempt has been conducted to evaluate the effect of habek on performance and immunity of broiler chickens. Five levels of whole habek, 0, 25, 100, 150 and 200 g/kg were incorporated into basal diet of 125 broilers for 5 weeks. The results of the study showed that including 150 g/kg habek into broiler diet make a significant improvement in the mean body weight, daily average gain, feed intake and food conversion ratio. However, in another experiment, habek had no effect on the immune response of the birds against Newcastle disease virus live vaccine when a group of 25 birds was given basal diet supplemented with 150 g/kg habek compare to that fed basal diet only.
Influence of Extra Supplementation with Arginine and Lysine on Overall Performance, Ovarian Activities and Humoral Immune Response in Local Saudi Hens
G. Basiouni,H. Najib,M.M. Zaki,A.S. Al-Ankari
International Journal of Poultry Science , 2006,
Abstract: This study was designed to investigate the effect of increasing level(s) of arginine (ARG) and/or lysine (LYS) over the normal requirements of the Leghorn breeds (NRC, 1994) and their interaction on performance, ovarian activity and humoral immune response of local Saudi chickens known for their low production. The outcome of the study revealed that feed intake and specific gravity of the eggs were the only traits significantly (P< 0.05) affected by the interaction between ARG and LYS. Hen-day production did not significantly (P>0.05) increase and feed conversion improved with the higher levels of ARG and LYS (1.54 and 2.05 %, respectively) compared to the controls. In spite of the significant effect of specific gravities of the eggs, no specific trend was found in response to the treatments. Albumen height was better in the control group in both treatments which supported the higher egg size of the control group compared to the other treatments. No significant differences were found among treatments or their interaction in all ovarian and oviductal measurements. However there was a tendency for an increase in the weight of F1 follicles (largest follicles) as a result of ARG supplementation at the 2.04 % level. The study of humoral immune response of the birds revealed that mean antibodies titers (MAT) at week 24, 28, 32 and 40 of age were nearly the same in all groups of birds and no significant differences between the groups in the designated periods (P>0.05). However, at week 36 of age, MAT of group treated with 1.54% ARG and 1.05% LYS were significantly higher than the controls (P< 0.05). A significant correlation between MAT and thymus weight index at week 40 of age was observed. Based on the results of this study, it is concluded that extra ARG, LYS and their interaction did not significantly affect performance and ovarian activity of the local birds but enhanced thymus size and maintain MAT level over time.
Performance Optimization of Logic Circuits based on Hybrid CMOS and CNFET Design
Eng. Shimaa I Sayed,Dr. M.M.Abutaleb,Prof. Zaki B. Nossair
International Journal of Recent Technology and Engineering , 2013,
Abstract: There is a pressing need to explore circuit design ideas in new emerging technologies in deep-submicron in order to exploit their full potential during the early stages of their development. Carbon nanotube (CNT) based technology has significant potential to replace silicon technology sometimes in the future. Single-walled carbon nanotubes are investigated for applications in logic and sensing circuits due to their superior transport properties. CMOS (complementary metal oxide semiconductor) technology is better in switching speed specially for NMOS. In this work we take advantage of the high mobility transport in p-type CNTFETs and combine them with high-performance conventional n-type MOSFETs, thereby achieving the best overall performance in a hybrid configuration. This paper presents a detailed simulation based assessment of circuit performance of this technology and compares it with 32nm CMOS and 32nm CNFET technologies. It is shown that the performance of the hybrid PCNFET-NMOS configuration is better than that of the pure CMOS in terms of noise margin (32.8% higher) and power consumption (60% lower) and therefore (2.5% lower )in PDP. The performance of PCNFET-NMOS is the same of pure CNFET for noise margin, 65% lower in power consumption and 2% lower in PDP. Also this integration of a carbon nanotube on an underlying CMOS circuit achieves a large saving in area that is amenable to future nanoscale device integration.
Eosinophil-active chemokines: assessment of in vivo activity
Teixeira, M.M.;
Brazilian Journal of Medical and Biological Research , 1998, DOI: 10.1590/S0100-879X1998000100003
Abstract: the selective recruitment of eosinophils in tissue is a striking feature of allergic diseases. recently, a family of chemoattractant molecules, namely chemokines, has been described which potently activates eosinophil function in vitro. we have developed a murine model of eosinophil recruitment to compare the relative potency and efficacy of chemokines in vivo. of the chemokines tested, only eotaxin and mip-1a induced significant accumulation of eosinophils in vivo, but eotaxin was more effective than mip-1a. chemokines, especially eotaxin acting via the ccr-3 receptor, may have a fundamental role in determining selective eosinophil recruitment in vivo
Study of ion beam sputtering using a glow discharge ion source
Abdelrahman, M.M.;
Brazilian Journal of Physics , 2010, DOI: 10.1590/S0103-97332010000100005
Abstract: in this work, sputtering yield in a glow discharge ion source system has been determined using the operating parameters of the ion source. the sputtering yield is found to be varied between 0.4 to 1 atoms removed per incident ion for nitrogen while for argon between 0.2 to 1.3 atoms removed per incident ion. the feature of this ion source is high output ion beam current and small size. operation of the ion source is quite simple since a stable discharge can be obtained within a large range of main parameters such as, discharge voltage, discharge current and gas pressure. also, beam profile for argon ion beam produced from the glow discharge ion source at id = 2,3 ma (discharge current) using argon gas with different gas pressures has been investigated.
Torsional vibration of carbon nanotubes under initial compression stress
Selim, M.M.;
Brazilian Journal of Physics , 2010, DOI: 10.1590/S0103-97332010000300004
Abstract: this study examines torsional vibration of single-walled carbon nanotubes (swcnts) subjected to initial compression stresses. the nanotube structures are treated within the multilayer thin shell approximation with the elastic properties taken to be those of the graphene sheet. simplified flügge shell equations of motion are proposed as the governing equations of vibration for the carbon nanotubes. a new equation of motion and phase velocity of torsional waves propagating in carbon nanotubes (cnts) subjected to initial compression stresses have been derived. the study reveals that the initial stresses present in the tube has a notable effect on the propagation of torsional waves. the results has been discussed and shown graphically. this investigation is very significant for potential application and design of nanoelectronics and nanodevices.
Corrosion Behaviour of Zn-Al-Cu Alloy in HCl Solution and its Inhibition
Ahmed,M.M.;
Portugaliae Electrochimica Acta , 2006,
Abstract: the corrosion behaviour of zn - al - cu alloy was studied in pure hcl solutions and in the presence of different concentrations of inhibitors. the techniques of measurements were: weight loss, linear polarization, polarization impedance and corrosion penetration. it was found that the corrosion rate of this alloy is greatly higher than that of zn or al. the inhibitors used were: heterocyclic pyridine (p), 2-methyl pyridine (2 mp), 3-methyl pyridine (3 mp) and 4-methyl pyridine (4 mp). these inhibitors behave as mixed type and their inhibition efficiency increases according to the order: 2 mp < 3 mp < p <4 mp. the values of activation energy of corrosion were determined in pure acid and in the presence of inhibitors. it was found that the presence of these inhibitors increases the value of activation within the same order of their inhibitory effect. the adsorption of the investigated inhibitors on the surface of the alloy follows frumkin?s isotherm.
Comparative Histological Study Vagus Nerve in Different Parts of Body on the Rabbits
M.M. Salech
Journal of Animal and Veterinary Advances , 2012,
Abstract: Through studying of vagus nerves in rabbits, histological compound observed that contain myelin nerve fiber but can be found variation percentage of different region of body, and non-myelin nerve fibers with different shapes of nucleus of the schwann cell depended on the area of nerve and function of the vagus nerve.
Analysis of the Profitability and Resource-Use Efficiency of Small-Scale Businesses in Ondo-State: A Panacea for Youth Unemployment
M.M. Fasoranti
Pakistan Journal of Social Sciences , 2012,
Abstract: The study examined the profitability and resource-use efficiency of small-scale business in Ondo-State. Multi-stage sampling technique was used to select 120 small-scale business operators in bakery, tailoring and block making services from Akoko North East, Akoko South West and Akoko North West of Ondo State. The data collected were analysed with the aid of descriptive statistics, gross margin and production function analyses. Results showed that the sampled businesses were profitable in the study area with estimated gross margin of N46, 068.8, N3, 588.8 and N39, 900.5 with estimated net returns of N33,172.00, N2,889.8 and N30,368.0 for bakery, tailoring and block making services, respectively. The result of the production function analysis showed that the inputs involved were efficiently allocated under bakery services while they were inefficiently allocated under tailoring and block making services. Bakery service was in stage 2 while tailoring and block making were in stages 1 and 3 of the production cycle, with estimated RTS of 0.613, 1.384 and-0.235, respectively.
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