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Search Results: 1 - 10 of 292312 matches for " Abdel-Aziz B. E "
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Serum testosterone and progesterone levels and ovarian activity as indicators for seasonal breeding in dromedary camels in Sudan
Babiker, E. A,,Ahmed, A. I,,Husna M. E,Abdel-Aziz B. E
Research Opinions in Animal & Veterinary Sciences , 2011,
Abstract: The present work was done to investigate the effect of season on level of testosterone, progesterone hormone and ovarian activity in Arabian dromedary camels. Over a period of one year (July 2009–June 2010), jugular blood samples were collected monthly from 7 mature male camels and 12 females at late pregnancy to detect the levels of testosterone and progesterone hormones. A total of 900 ovarian follicles were measured in the slaughterhouses of Tamboul and Um-Elgura to define the effect of season on ovarian activity. The obtained results showed that plasma testosterone levels greatly varied among months of the year. It increased during July and August and decreased during the period from September to February. The level started to increase again during March and remained high until the end of the study in June. Plasma progesterone level was high during July, while it dropped at parturition during August. The level of progesterone remained low during the period from September to February, before it started to rise again in March and remained high until the end of the study in June. The rise of progesterone level in females coincided with the rise of testosterone in males. Ovarian activity was observed throughout the different seasons with a maximum activity during autumn. According to the hormonal findings and ovarian activity, there is a clear breeding season in Arabian dromedary camel in the Butana area, northeast of Sudan extending throughout summer (March – June) and autumn (July–October).
A Study of Some Factors Affecting the Age at First Calving and the Calving Interval of Different Sudan Zebu Breeds
B.E. Abdel-Aziz,T.E. Ali,F.A. Ahmed
Journal of Animal and Veterinary Advances , 2012,
Abstract: One thousand one hundred and four primiparous Butana, Kenana and ? Friesian x ? Kenana cross-bred heifers born during the years 1953 to 1986 at three Research Centre in North Sudan (Atabara) and Central Sudan (Nisheishiba and Um-Banein) were studied for age at First Calving (AFC). Also 4230 calving interval (CI) records covering the years from 1957 to 1986 were studied. The overall means of age at first calving of Butana, Kenana and ? Friesian x ? Kenana crosses were 43.20?0.11 (SE), 53.60? 0.13 and 42.30?0.34 months, respectively. The breed effect between the AFC of Kenana and their crosses to Friesian was found highly significant (p<0.001). The heifers? own season of birth had no major effect. But their own year of birth was found highly significant (p<0.001) source of variation upon age at first calving. Kenana breed located at Nisheishiba was found significantly (p<0.01) younger at first calving (52.70 months) when compared to those at Um- Banein (55.00 months). On the other hand, the result on calving interval revealed overall means of Butana, Kenana and ? Friesian x ? Kenana- crosses as 12.60?0.06, 15.20? 0.04 and 14.80?0.12 month, respectively. Unlike AFC, the effect of breed on CI was not found a major one in comparing Kenana and their crosses. But the effects of season and year of calving were found to have major sources of variation upon calving interval. The effect of herd location on CI was not found significant for the Kenana breed at Nisheishiba (15.30 months) and Um-Banein (15.20 months) centres. The longest mean CI was found to occur between the first and second parities in all genotypes studied except for Butana where the sixth CI had the highest mean. This effect of parity was found highly significant. Sex of calf affected neither age at first calving nor calving interval.
A field survey of some camel productive and reproductive traits in the Butana area, Sudan
Babiker E. A,,Abdel-Aziz B. E,,Husna M. Elbashir,Ahmed A. I
Research Opinions in Animal & Veterinary Sciences , 2011,
Abstract: This field survey study was conducted to investigate major constraints facing camel herd growth and reproduction in the Butana area. Data were collected during the study period from July 2009 to June 2010. Forms of questionnaires distributed, included different productive and reproductive characters, where a total of 321 camels were surveyed. The results showed that the number of pregnant she-camels was found positively correlated with age. Seventy percent of delivered females were recorded during August. General reproductive traits recorded during the survey period revealed that mean age at puberty was 40.5 months, while full reproductive potential was reached at a mean of 60 months. Age at first calving was recorded to be 72 months, while calving interval was observed at a mean of 30.5 months. Daily milk yield surveyed was higher (P<0.05) during winter and autumn (3.16 ± 2.41 and 2.88 ± 2.41 L, respectively), while lower daily milk production was recorded during summer (1.23 ± 1.22 L). Milk production was found positively correlated with age.
Dynamic Behaviour of Cast A356/Al2O3 Aluminum Metal Matrix Nanocomposites  [PDF]
E. Y. El-Kady, T. S. Mahmoud, A. A. El-Betar, M. Abdel-Aziz
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.311118
Abstract: The present work includes the study of the dynamic properties of the nanocomposites specimens. The dynamic properties of A356/Al2O3 nanocomposites were investigated through different fabrication conditions. The A356/Al2O3 nanocomposites specimens were fabricated using a combination between the rheocasting and squeeze casting routes. The composites were reinforced with Al2O3 particulates of 60 and 200 nm and different volume fractions up to 5 vol.%. The dynamic properties of the A356/Al2O3 nanocomposites were investigated through measuring the dynamic properties of specimens. Free vibration method is used to measure frequency response (fn ), and damping factor (ξ). The viscoelastic properties such as loss factor η, storage modulus (E'), and loss modulus (E\") were obtained. The results concluded that, the dynamic properties of nanocomposites were improved by increasing the volume fractions of nanoparticulates and decreasing the nanoparticulates size. The results indicated also that, the damping factor, and the related parameters (η, E' and E\") was strongly affected by increasing both volume fraction and the particulates.
Current Perspectives on Sunitinib Targeted Therapy for Tumors  [PDF]
Karolin Kamel Abdel-Aziz
Journal of Cancer Therapy (JCT) , 2011, DOI: 10.4236/jct.2011.24073
Abstract: This review highlights therapeutic agents from recent cancer therapeutic trials showing the greatest potential for further clinical use for sunitinib in the near future. In fact, sunitinib is one of multi-tyrosine kinase inhibitors; tyrosine kinases are enzymes, which transfer phosphate groups from ATP to the hydroxyl group of tyrosine residues on signal transduction molecules. Phosphorylation of signal transduction molecules, in turn, induces dramatic changes in tumor growth, including activation of angiogenesis and DNA synthesis. Therefore, sustain efforts have been directed for developing inhibitors for angiogenesis, which is the marginal process for tumor growth and development through targeting TKs. Almost if not all angiogenesis inhibitors target the vascular endothelial growth factor (VEGF) signaling pathway.
Laparoscopic Management for Non-Palpable Testis  [PDF]
Abdel-Aziz Ali Emara
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.37052

Purpose: To present our experience with laparoscopic management of the non-palpable undescended testis. Patients and Methods: Between Nov. 2010 and Oct. 2012, 47 non-palpable testes in 41 patients were evaluated prospectively by laparoscopy. The age of the patients at the time of surgery varied from 1 to 9 years with a mean age of 2.85 years. Testicular viability and location were evaluated by physical examination and Doppler ultrasonography after 1 and 3 months. Results: Out of 49 testicular units, 47 (95.9%) were successfully treated by laparoscopic orchiopexy. 45 testicular units (91.8%) were treated by one-stage laparoscopic orchiopexy, 2 (4.1%) were treated by two-stage laparoscopic orchiopexy and 2 (4.1%) diagnosed as vanishing testis with detection of blind end spermatic vessels and vas deferens during laparoscopy. Physical examination and Doppler study demonstrated that 46 of 47 testes (97.9%) were viable and 45 of 47 (95.7%) were located in the lower scrotum and 2 of 47 (4.3%) in the upper scrotum at the end of follow-up. Conclusion: The laparoscopy is a reliable technique for diagnosis and treatment of the non-palpable intra-abdominal testis with high success and survival rates of the testes.

Continuous Inferior Alveolar Nerve Block Using an Indwelling Catheter and Inferior Maxillary Artery Embolization for the Management of Atypical Trigeminal Neuralgia  [PDF]
Samer Abdel-Aziz, Ahmed Ghaleb
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.39079

A 40-years-old female patient with severe right facial pain with a throbbing component along the mandibular division of the trigeminal nerve resistant to medical management. Continuous inferior alveolar nerve block with local anesthetics using an indwelling catheter provided a complete pain resolution for the patient for 2 weeks, after which the catheter got infected and was removed. A trial of balloon occlusion of the right internal maxillary artery provided complete resolution of the throbbing component of the patient’s pain. This was followed by permanent embolization with multiple coils.

Change in Impedance with Change in Posture during Spinal Cord Stimulator Placement  [PDF]
Samer Abdel-Aziz, Ahmed Ghaleb
Pain Studies and Treatment (PST) , 2014, DOI: 10.4236/pst.2014.22011

In this article we discuss the effect of posture on impedance during the placement of a spinal cord stimulator. Although, according to several studies, there appears not to be a specific and consistent change in impedance with change in posture, we noticed on multiple occasions that if the impedance remains very high during spinal cord stimulator (SCS) lead placement, asking the patient to sit up from the prone position may drop the impedance down. This could be explained by having air around the lead, from using loss of resistance to air technique in finding the epidural space, which moves up when sitting the patient up, or having the lead immersed in epidural fat. Sitting the patient up from the prone position should be tried if the impedance remains very high before aborting the procedure and taking the lead out.

Combined Sacral Nerve Roots Stimulation and Low Thoracic Spinal Cord Stimulation for the Treatment of Chronic Pelvic Pain  [PDF]
Samer Abdel-Aziz, Ahmed Ghaleb
Pain Studies and Treatment (PST) , 2014, DOI: 10.4236/pst.2014.22014

Some pelvic pain syndromes are very resistant to medical treatment. Several studies have demonstrated that sacral neuromodulation, which has been successfully used for the treatment of bladder dysfunction, incontinence, urinary retention and urinary frequency [1]-[3], can be successfully used for the treatment of chronic pelvic pain [4]-[7]. Several studies have also demonstrated significant involvement of dorsal column pathways in the transmission of visceral pelvic pain [8] and the successful use of spinal cord stimulation for the treatment of chronic pelvic pain [9]. We report three cases of severe chronic pelvic pain that failed conservative treatment modalities. Placement of a combined sacral nerve roots stimulator and a low thoracic spinal cord stimulator resulted in a significant pain relief and improvement in daily life activities. We believe that this combination may help patients suffering from chronic pelvic pain resistant to medical management.

Annulatascus nilensis sp. nov., a new freshwater ascomycete from the River Nile, Egypt
M.A. Abdel-Wahab,F.A. Abdel-Aziz,S.S. Mohamed,A.E. Abdel-Aziz
IMA Fungus , 2011,
Abstract: Annulatascus nilensis sp. nov., from freshwater habitats in Egypt, is described, illustrated and compared to other species in the genus. Phylogenetic analyses of its LSU rDNA sequence with similar fungi placed the new species in the genus Annulatascus (Annulatascaceae, Sordariomycetidae incertae sedis). Annulatascus nilensis is characterized by immersed ascomata with an ascomatal neck oriented horizontally to the substrate surface, asci with a long, narrow stalk and massive bipartite apical ring, and 5-11-septate, hyaline ascospores surrounded by a large irregular, granular sheath that is not seen in water.
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