53 research outputs found
Rubberized reinforced concrete columns under axial and cyclic loading
No full textThe experimental study presented in this research was conducted to understand the performance of rubberized concrete columns under axial loads and numerically analyze the conduct of rubberized reinforced concrete (RRC) columns under cyclic loads. Twelve large-scale columns with square and circular cross sections were utilized to carry out experimental testing. Under axial loading, fine aggregate was replaced in percentages of 0%, 10%, and 15% with crumb rubber (CR). Square RRC columns were examined by a finite element program (ABAQUS) under cyclic loading. The experimental results indicated that the columns with crumb rubber had a lower load capacity than those without crumb rubber when exposed to axial loads. The numerical results were in good alignment with the experimental results, indicating that the simulated model may simulate the behavior of rubberized concrete columns under both axial and cyclic loads. According to the numerical analyses, the lateral displacement was significantly improved for rubberized reinforced concrete columns with 10% and 15% replacement of fine aggregates compared to columns without CR. Adding 10% and 15% of crump rubber to the fine aggregate in reinforced concrete columns increased the displacement ductility. The equivalent viscous damping ratio was enhanced by 33.67% when increasing crumb rubber (CR) from 0% to 10%, and when crumb rubber (CR) replacement became 15%, the damping ratio increased to 44.02%.The rubberized reinforced concrete columns showed a more ductile reaction than the traditional reinforced concrete columns, as evidenced by their softer post-peak response
Biliary fistula and late recurrence of liver hydatid cyst: Role of cysto-biliary communication: A prospective multicenter study
No full textBackground: Hydatid cyst disease (HCD) is common in certain locations. Surgery is associated with postoperative biliary fistula (POBF) and recurrence. The primary aim of this study was to identify whether occult cysto-biliary communication (CBC) can predict recurrent HCD. The secondary aim was to assess the role of cystic fluid bilirubin and alkaline phosphatase (ALP) levels in predicting POBF and recurrent HCD. Aim: To identify whether occult CBC can predict recurrent HCD. The secondary aim was to assess the role of cystic fluid bilirubin and ALP levels in predicting POBF and recurrent HCD. Methods: From September 2010 to September 2016, a prospective multicenter study was undertaken involving 244 patients with solitary primary superficial stage cystic echinococcosis 2 and cystic echinococcosis 3b HCD who underwent laparoscopic partial cystectomy with omentoplasty. Univariable logistic regression analysis assessed independent factors determining biliary complications and recurrence. Results: There was a highly statistically significant association (P ≤ 0.001) between cystic fluid biochemical indices and the development of biliary complications (of 16 patients with POBF, 15 patients had high cyst fluid bilirubin and ALP levels), where patients with high bilirubin-ALP levels were 3405 times more likely to have biliary complications. There was a highly statistically significant association (P ≤ 0.001) between biliary complications, biochemical indices, and the occurrence of recurrent HCD (of 30 patients with recurrent HCD, 15 patients had high cyst fluid bilirubin and ALP; all 16 patients who had POBF later developed recurrent HCD), where patients who developed biliary complications and high bilirubin-ALP were 244.6 and 214 times more likely to have recurrent hydatid cysts, respectively. Conclusion: Occult CBC can predict recurrent HCD. Elevated cyst fluid bilirubin and ALP levels predicted POBF and recurrent HCD
The Impact of Transit-Oriented Development on Fast-Urbanizing Cities: Applied analytical study on Greater Cairo Region
No full textTransportation has always been the backbone of development. Transit-oriented development (TOD) has been theorized, piloted and expanded increasingly in the past few decades. In this regard, this paper investigates the relationship between urban development, the transportation process, and the required implementation guidelines within fast-urbanizing cities, such as Cairo. After reviewing different related sustainable development theories, the study investigates pioneering case studies that have applied TOD and provided adequate implementation frameworks. The authors then extract and compare a set of required policies. The current Egyptian development paradigm is then discussed in relation to these enabling policies, focusing on Greater Cairo Region, Egypt. The authors debate previous development plans, progress, and newly proposed ones, focusing on the transportation process as the means for development. The study concludes with a set of required guidelines to ensure the integration of transportation with land-use planning, thus ensuring a more prosperous and inclusive urban development
Epidemiology, Causative Agents and Clinical Features of Onychomycosis in El-Gharbia Governorate
No full text"The Effect of Using Chenille Yarns Produced from polyester Microfiber on Upholstery Fabrics Properties"
No full textThe research aims to study the effect of using chenille yarns produced from polyester microfiber on the properties of upholstery fabrics through a comparative study between samples of chenille fabric produced by different pile material of chenille yarns (traditional polyester (48 fiber) Polyester microfiber chenille (288,576 fiber), different weave structures were used with difference of float weft length(1.5-2.1-2.6mm). Tests were done to the produced samples (tensile strength and elongation test of textile fabrics, abrasion resistance test; and stiffness of fabrics test). It was found in the statistical analysis of the tests’ results that chenille polyester microfiber (576 fibre) weave structure with a float length (1.5 mm) achieved the highest tensile strength and elongation, chenille polyester microfiber (288 fibre) weave structure with a float length (2.6 mm) achieved the highest abrasion resistance, and lastly traditional polyester (48 fiber) weave structure with a float length (1.5mm) has a higher stiffness
Cytogenetic and molecular studies on two faba bean cultivars revealed their difference in their aluminum tolerance
No full textTwo cultivars of faba bean (Vicia faba ‘Giza 843’ and ‘Nobaria 3’) that differ in aluminum (Al) tolerance were used to study cytogenetic and genomic alterations under the influence of Al Cl3 (5, 15, and 25 mmol AlCl3) for different periods (6, 12 and 24 h). Under Al treatments, mitotic index in both cultivars decreased and total chromosomal abnormalities increased. The frequencies of micronuclei and chromosomal abnormalities (C-anaphase, metaphase-star chromosomes, breaks, sticky and disturbed chromosomes during metaphase or anaphase) in ‘Giza 843’ were lower than in ‘Nabaria 3’. Increase of the registered cytogenetic events under the influence of Al stress led to increase the detected polymorphism using RAPD and ISSR markers. Application of RAPD primers gave the same value of polymorphism in both faba bean cultivars under Al stress. Polymorphism average of nine ISSR primers of ’Giza 843’ (65.36 %) was lower than that of ‘Nobaria 3’ (71.59 %). Molecular markers, cytogenetic characteristics and seedling growth data indicate that Al tolerance of ‘Giza 843’ was higher than of ‘Nobaria 3’. This work shows that cytogenetic and ISSR techniques could be used efficiently to distinguish between the ability of two faba bean cultivars to tolerate toxic effects of Al
The prevalence of active nutritional rickets in Egyptian infants in Cairo
No full textAbstractThe Prevalence of Active Nutritional Rickets in Egyptian Infants in Cairo Introduction Rickets is a preventable disease which still exists in many countries needing accurate estimation to properly implement preventive strategies.MethodsA cross sectional study was conducted on 800 healthy infants 385 at the age of 9months and 415 at the age of 18months attending the primary health care centres well distributed all-over Cairo to determine the prevalence of rickets. All had their weight and height measured together with measurement of serum calcium, phosphorus and alkaline phosphatase (ALP). ALP was the screening tool for rickets.ResultsSerum calcium correlated positively with the length of infants in both groups. The prevalence of rickets was 1.125% in the whole studied infants, with 1.04% of those aged 9months and 1.2% of those aged 18months having active rickets. No differences were found between serum calcium and phosphorus between a random sample of the study participants and the positive cases. Rachitic infants received lesser caloric intake than recommended. Positive cases at the age of 18months showed more nutritional calcium deficiency than the younger group who were all deficient in sun exposure.ConclusionRickets is still prevalent in Egypt; however, at a lower prevalence than that reported before. We recommend examining all infants at the age of 18months by primary health care physicians and screening by ALP as this age showed a prevalence of rickets of 12/1000 to direct proper treatment and avoid the physical deformities resulting from insufficient calcium and/or vitamin D in infants in the early stages of walking. For the screening and diagnosis of rickets in a limited resources country like Egypt, we recommend the measurement of ALP. Proper education about calcium rich foods, adequate number of servings/day and adequate sun exposure is of paramount importance
Robust anticancer efficacy of Naja haje venom-loaded silica nanoparticles against triple-negative breast cancer xenografts in a preclinical rat model
No full textBackground:
Breast cancer, a prevalent disease affecting women globally, is particularly aggressive and has limited treatment options.
Aim:
Snake venom, containing active chemicals, has shown potential in medicine.
Methods:
The study investigates the anticancer effect of Egyptian cobra Naja haje venom alone and in combination with Nanoparticles on Triple-negative breast cancer (TNBC) in vivo. The study involved dividing experimental animals into five groups, each with 10 rats, each treated with different doses of crude venom, G2 and G3, respectively. The study involved loading venom onto nanoparticle-based delivery systems, measuring inflammatory cytokines and tumor markers, extracting RNA, real-time qRT-PCR gene expression, and histopathological examination of breast tissue.
Results:
The study involved administering Naja haje crude venom at higher (1/5 LD50) and lower (1/20 LD50) dose levels in groups G2 and G3, respectively.
Conclusion:
The study found that venom treatment in groups G4 and G5 significantly improved inflammatory cytokine and tumor markers levels, increased expression of tumor-suppressor genes, and increased apoptosis and necrosis. [Open Vet J 2024; 14(12.000): 3552-3562
Assessment of self-reported practice patterns regarding treatment of dyslipidemia among physicians under training in family medicine in Ismailia governorate - Egypt
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