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Search Results: 1 - 10 of 1459 matches for " Nahla Saleh;Buzalaf "
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Slow-release fluoride devices: a literature review
Pessan, Juliano Pelim;Al-Ibrahim, Nahla Saleh;Buzalaf, Marília Afonso Rabelo;Toumba, Kyriacos Jack;
Journal of Applied Oral Science , 2008, DOI: 10.1590/S1678-77572008000400003
Abstract: although the prevalence of caries has decreased dramatically over the past decades, it has become a polarised disease, with most of subjects presenting low caries levels and few individuals accounting for most of the caries affected surfaces. thus it become evident for the need of clinical approaches directed at these high-risk patients, in order to overcome problems related to compliance and low attendance at dental care centres. slow-release fluoride devices were developed based on the inverse relationship existing between intra-oral fluoride levels and dental caries experience. the two main types of slow-release devices - copolymer membrane type and glass bead - are addressed in the present review. a substantial number of studies have demonstrated that these devices are effective in raising intra-oral f concentrations at levels able to reduce enamel solubility, resulting in a caries-protective effect. studies in animals and humans demonstrated that the use of these devices was able to also protect the occlusal surfaces, not normally protected by conventional fluoride regimens. however, retention rates have been shown to be the main problem related to these devices and still requires further improvements. although the results of these studies are very promising, further randomised clinical trials are needed in order to validate the use of these devices in clinical practice. the concept of continuously providing low levels of intra-oral fluoride has great potential for caries prevention in high caries-risk groups.
Synthesis and Characterization of Sb65Se35-xGex Alloys  [PDF]
Saleh Ahmed Saleh
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.27127
Abstract: Density, chemical, structural and vibrational studies of Sb65Se35-xGex system with 0 ≤ x ≤ 20 produce by melt-quench technique were carried out using Archimedes method, Energy Dispersive Spectroscopy (EDS), X-ray diffraction (XRD) and Raman spectroscopy. All specimens are polycrystalline in nature as confirmed by XRD pattern. The compositional dependence of the XRD and Raman spectra suggests the presence of two basic structural units, SbSe3 pyramids with three-fold coordinated Sb atom at the apex and GeSe4 tetrahedrons. The compositional dependence of these physic Chemical properties of the investigated samples are investigated and discussed in light of many models. PACS: 68.55. Ln; 61.50. Ks; 68.55.Jk
Respectable people in Mamluk sultans era: Religious and scientific life :
Nahla Moustafa
Historical Kan Periodical , 2010,
Abstract: . . . .
Respectable people in Mamluk sultans era: The economic conditions :
Nahla Moustafa
Historical Kan Periodical , 2009,
Abstract: .
Respectable people in Mamluk sultans era: In political and administrative life :
Nahla Moustafa
Historical Kan Periodical , 2009,
Abstract: (648-923 /1250-1517 ) . . ( ) .
Respectable people in Mamluk sultans era: Social Conditions :
Nahla Moustafa
Historical Kan Periodical , 2010,
Abstract: . . ( ) .
Optimization of physical characterization, skin permeation of naproxen from glycofurol-based topical gel
Barakat Nahla
Asian Journal of Pharmaceutics , 2010,
Abstract: In view of good skin tolerability, glycofurol was used as a vehicle-based gel and its effect on the topical penetration of Naproxen (NAP) was investigated. The aim of this study was to develop a suitable gel with bioadhesive property, spreadability, and viscosity for a topical anti-inflammatory effect. Three gelling agents were examined: Carbopol 974P, Gantrez AN 119, and Polyvinylpyrroloidone PVP K30. Skin permeation rates and lag times of NAP were evaluated using the Franz-type diffusion cell, in order to optimize gel formulation. The permeation rate of the NAP-based gel across excised rat skin was investigated. A significant increase in permeability parameters such as steady-state flux (Jss), permeability coefficient (Kp), and penetration index (PI) were observed in the optimized formulation containing 2% Transcutol as a permeation enhancer. From the skin irritation test, it was concluded that the optimized novel tetraglycol-based gel formulation was safe to be used for transdermal drug delivery. The developed naproxen / glycofurol-based gel appeared promising for dermal and transdermal delivery of naproxen and could be applicable with water-insoluble drugs, which would circumvent most of the problems associated with drug therapy.
Angiogenesis and inflammatory bowel disease
Azzam Nahla
Saudi Journal of Gastroenterology , 2007,
Abstract: Inflammatory bowel disease (IBD) has gained immense attention recently due primarily to increasing prevalence. The exact disease mechanism is still unknown. There is considerable evidence of interrelation between the mechanisms of angiogenesis and the chronic inflammation of IBD. This evidence was obtained from animal models of colitis and confirmed in human studies. Serum levels of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (b-FGF) have been found to be significantly higher in patients with IBD than in controls. In addition, it was found that these factors correlate well with disease activity and decrease with the use of steroids. Therefore pharmacological inhibition of angiogenesis has the potential to be a therapeutic strategy in IBD.
The 3D virtual environment online for real shopping
Nahla Khalil
Computer Science , 2015,
Abstract: The development of information technology and Internet has led to rapidly progressed in e-commerce and online shopping, due to the convenience that they provide consumers. E-commerce and online shopping are still not able to fully replace onsite shopping. In contrast, conventional online shopping websites often cannot provide enough information about a product for the customer to make an informed decision before checkout. 3D virtual shopping environment show great potential for enhancing e-commerce systems and provide customers information about a product and real shopping environment. This paper presents a new type of e-commerce system, which obviously brings virtual environment online with an active 3D model that allows consumers to access products into real physical environments for user interaction. Such system with easy process can helps customers make better purchasing decisions that allows users to manipulate 3D virtual models online. The stores participate in the 3D virtual mall by communicating with a mall management. The 3D virtual mall allows shoppers to perform actions across multiple stores simultaneously such as viewing product availability. The mall management can authenticate clients on all stores participating in the 3D virtual mall while only requiring clients to provide authentication information once. 3D virtual shopping online mall convenient and easy process allow consumers directly buy goods or services from a seller in real-time, without an intermediary service, over the Internet. The virtual mall with an active 3D model is implemented by using 3D Language (VRML) and asp.net as the script language for shopping online pages
Role of Prostate Specific Antigen (PSA) in Pathogenesis of Prostate Cancer  [PDF]
Saleh Altuwaijri
Journal of Cancer Therapy (JCT) , 2012, DOI: 10.4236/jct.2012.34043
Abstract: Prostate cancer (PCa) is most common diagnosed cancer in men and it is second most common cause of male cancer death. Many factors have been implicated in the pathogenesis of PCa. Although many papers have discussed the prostate specific antigen (PSA) as biomarker of PCa, very few have addressed its rule in the carcinogenesis, metastasis and invasion of PCa. In this article we will review the pathological role of PSA, as a potential target in the therapeutics of PCa.
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