Mohamed Zaki

In this article, the homotopy analysis method (HAM) for obtaining semi analytical solutions of biharmonicequations is introduced. Series solutions of the problem under consideration are developed by meansof HAM and the recurrence relations are given explicitly. The initial approximation can be freely chosen withpossible unknown constants which can be determined by imposing the boundary and initial conditions. Thenumerical examples show the rapid convergence of the series constructed by this method to the exact solution.Moreover, this technique does not require any discretization, linearization or small perturbations. Test problemshave been considered to ensure that HAM is accurate and efficient compared with the variational iterationmethod (VIM).

Background: The statins (or HMG-CoA reductase inhibitors) formed a class of hypolipidemic drugs used to lower cholesterol levels in people with or at risk of cardiovascular disease. They lower cholesterol by inhibiting the enzyme HMG-CoA reductase, which is the rate-limiting enzyme of the mevalonate pathway of chloestrol synethesis. The context and purpose: Simple, sensitive and rapid extractive spectrophotometric method has been developed for the assay of statin drugs, simvastatin, pravastatin sodium and atorvastatin calcium, in pure form and in tablets. The method involves the formation of coloured ion-pairs between the drugs and the Mo(V)-thiocyanate

Toxoplasma gondii and Bartonella spp. are zoonotic pathogens of cats. Feline immunodeficiency virus (FIV) and feline leukemia virus (Fel.v) are related to human immunodeficiency virus and human leukemia virus, respectively, and these viruses are immunosuppressive. In the present study, the prevalence of antibodies to T. gondii, Bartonella spp., FIV, as well as Fel,v and Dirofilaria immitis antigens was determined in sera from feral cats tFelis catusi from Cairo, Egypt. Using a modified agglutination test, antibodies to T. gondii were found in 172 (95.5%) of the 180 cats with titers of]:5 in 9, 1:10 in 9, I :20 in 3, 1:40 in 5, ]:80 in 5, I: 160 in 15, I :320 in 22, and] :640 or higher in 104. Thus, 57.4% had high T. gondii titers. Antibodies to Bartonella spp. were found in 105 (59.6%) of 178, with titers of 1:64 in 45, 1:128 in 39,1:256 in 13, 1:512 in 3,1:1,024 in 4, and 1:2,048 in I cat. Antibodies to FIV were detected in 59 (33.9%) of 174 cats. Of 174 cats tested, antigens to FeLv, and D. immitis were detected in 8 (4.6%) and 6 (3.4%) cats, respectively. The results indicate a high prevalence of T. gondii, Bartonella spp .. and FlV infections in cats from Cairo, Egypt. This is the first report or Bartonella spp., and D. immitis infection in cats in Egypt.

The global rising incidence of hepatocellular carcinoma (HCC), which parallels the increase of hepatitis C virus (HCV) prevalence, has sparked a renewed interest in discovering additional HCC serum markers. In this study, we investigated the clinical use of serum E-cadherin, ICAM, MMP-2, VEGF, OPN and ?-catenin as potential diagnostic makers for HCV/genotype 4-associated HCC. Twenty cases of healthy subjects, 11 cases with asymptomatic HCV/genotype 4 carriers (ASC), 28 chronic hepatitis (CH) cases and 32 patients with HCC were enrolled in this study. Serum levels of proteins were measured by a sandwich-enzyme-linked (ELISA) assay. The diagnostic accuracy of each candidate marker was evaluated using receiver-operating characteristic (ROC) curve analysis, reporting the area under the curve (AUC) and its 95%

Serum taurine levels were measured in fifty women selected from a wide number of patients presented with irregular uterine bleeding (IUB) to the outpatient clinic of the Obstetrics and Gynecology Hospital, Ain Shams University. No significant differences in age and menopausal status were found. The control group comprised ten healthy women that enrolled as volunteers. According to the findings observed after full clinical examination, ultrasonography, endometrial biopsy or fractional uterine curetting and tumor marker (CA-125) determination, 15 women were diagnosed with endometrial cancer (EC), 10 with cystic endometrial hyperplasia (CEH), 15 with fibromyoma, and 10 women were diagnosed as dysfunctional uterine bleeding (DUB). The results showed non-significant (P > 0.05) changes in the levels of CA-125 in all patients except in the cancer group where it exhibited a value nearly double that of normal (P < 0.01). Serum taurine levels exhibited values lower than control with 8 %, 14 %, 32 % and 56 % in the serum of patients diagnosed as DUB (P > 0.05), fibromyoma (P > 0.05), CEH (P < 0.01) and EC (P < 0.01) respectively.

The increased number of web services and the continuous need to integrate them into complex business processes have increased the need to enhance the web service discovery and selection processes. Service discovery based on semantics of web services is one of the main needs in service integration and composition. The main current approaches for semantic discovery of services are the keyword-based approach and the ontology-based approach. The plain simple keyword matching strategy is time-consuming and has inefficient recall and precision. The ontology-based strategy, on the other hand, is efficient, but may not be practical for the wide public use due to the lack of domain experts. In this paper, we propose a new approach that support semantic service discovery and service backing up in case of service unavailability. This approach is built using the FCA ( Formal concept analysis ) lattices and the WordNet.

The volume of shale calculation based on naturally occurring gamma ray frequently overestimates shale volume when radioactive material other than shale is present, for example where sand appears to be shale. In this situation, shale volume calculations from other methods are highly recommended in order to avoid overestimation or underestimation of shale volume.