110 research outputs found

    Monte-Carlo Galerkin Approximation of Fractional Stochastic Integro-Differential Equation

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    A stochastic differential equation, SDE, describes the dynamics of a stochastic process defined on a space-time continuum. This paper reformulates the fractional stochastic integro-differential equation as a SDE. Existence and uniqueness of the solution to this equation is discussed. A numerical method for solving SDEs based on the Monte-Carlo Galerkin method is presented

    Forensic dissection of lip print as an investigative tool in a mixed Egyptian population

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    Background: Identification is a major problem facing forensic practitioners, DNA and finger prints are highly useful but sometimes aren’t easily collected from the crime scene. Lip print could be useful in this field being unique to each individual.Aim: The current study aimed at detecting the frequency and gender relation of lip print pattern in an Egyptian sample.Methodology: Samples were collected on white copy paper, divided into four quadrants then examined with magnifying lens for pattern distribution.Results: The study showed that pattern IV was the most frequently represented pattern in the study sample, pattern I & II were more prevalent in males and females respectively. Prevalent pattern in Cairo and Lower Egypt was I while it was IV in Upper Egypt.Conclusion: The lip print pattern can differ due to gender and geographical origin in Egyptian subjects.Keywords: Lip print, Egypt, Gender, Geographical distribution, Identification, Anthropology. Gender differenc

    Effects of glycine betaine on plant growth and performance of Medicago sativa and Vigna unguiculata under water deficit conditions

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    Managing water consumption of the crops is one of the strategies which have been adopted locally and worldwide in current trends of sustainable agriculture. In addition to the low level of water resources in UAE because of the rare precipitation, no fresh, free-flowing water, rivers, lakes or streams. The present study was aimed to evaluate the effects of exogenous Glycine Betaine (GB) on Alfalfa (Medicago sativa) and Cowpea (Vigna unguiculata) within different levels of drought stress. A pot experiment was designed on a completely randomized block design (CRBD) with three replicates. Exogenous GB was applied as a foliar spray in three levels (0,100 and 200 ppm) five times with five days intervals. Drought stress starts within the second GB treatment in three levels (24h: 100% well-watered), (48h: 60% water deficit) and (72h: 40% water deficit) depending on the required quantity. Growth characteristics, pigment concentrations, biochemical content and Mineral nutrients levels were measured in response to the treatment variables. Results showed that the GB has a significant increment in Growth parameters, biochemical contents, and Mineral nutrients concentrations. The results of the present investigation suggested that the exogenous application of GB was improved the drought tolerance in Cowpea and has enhanced the Alfalfa performance under drought stress in both concentrations 100 and 200 ppm under drought stress of 60% of irrigations water.  In due of comparison of Cowpea and Alfalfa, it’s found from this study that GB has a better effect on the Cowpea under drought stress than Alfalfa

    Evaluation of innovative polyvinyl alcohol/ alginate/ green palladium nanoparticles composite scaffolds: Effect on differentiated human dental pulp stem cells into osteoblasts

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    Three-dimensional (3D) scaffolds are attracting great concern for bone tissue engineering applications. However, selecting an appropriate material with optimal physical, chemical, and mechanical properties is considered a great challenge. The green synthesis approach is essential to avoid the production of harmful by-products through textured construction, sustainable, and eco-friendly procedures. This work aimed at the implementa tion of natural green synthesized metallic nanoparticles for the development of composite scaffolds for dental applications. In this study, innovative hybrid scaffolds of polyvinyl alcohol/alginate (PVA/Alg) composite loaded with various concentrations of green palladium nanoparticles (Pd NPs) have been synthesized. Various char acteristic analysis techniques were used to investigate the synthesized composite scaffold’s properties. The SEM analysis revealed impressive microstructure of the synthesized scaffolds dependent on the Pd NPs concentration. The results confirmed the positive effect of Pd NPs doping on the sample stability over time. The synthesized scaffolds were characterized by the oriented lamellar porous structure. The results confirmed the shape stability, without pores breakdown during the drying process. The XRD analysis confirmed that doping with Pd NPs does not affect the crystallinity degree of the PVA/Alg hybrid scaffolds. The mechanical properties results (up to 50 MPa) confirmed the remarkable effect of Pd NPs doping and its concentration on the developed scaffolds. The MTT assay results showed that the incorporation of Pd NPs into the nanocomposite scaffolds is necessary for increasing cell viability. According to the SEM results, the scaffolds with Pd NPs provided the differentiated grown osteoblast cells with enough mechanical support and stability and the cells had a regular form and were highly dense. In conclusion, the synthesized composite scaffolds expressed suitable biodegradable, osteo conductive properties, and the ability to construct 3D structures for bone regeneration, making them a potential option for treating critical deficiencies of bone

    Popularity of the Consumption of Dietary Supplements and its Associated Factors among Students in an Egyptian University: A Cross-sectional Study

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    BACKGROUND: Dietary supplements (DS) use has substantially become prevalent worldwide. However, a limited number of studies have addressed the consumption of DS among college students. AIM: The objective of the study was to explore the prevalence of DS use among college students in an Egyptian college, their motives for DS use, and the association with sociodemographic and lifestyle factors. METHODS: A cross-sectional study was conducted on 180 (18–25 years) college students at Helwan University. A self-administered questionnaire that included sociodemographic and lifestyle characteristics, DS use, commonly used types, reasons for use, and sources of information was employed. RESULTS: More than two-thirds of the participants (117 students) have used DS with no difference among sex except for the types and motives for use (p < 0.001). The most used types were amino acids and proteins, multivitamins and minerals, and weight-loss herbals. Male students mainly used amino acids and proteins (54.7%), multivitamins, and minerals (17.2%), for building muscles (50%), gaining more energy (14%), and maintaining good health (14%). Female students consumed multivitamins and minerals (35.8%), weight-loss herbals (28.3%), for health promotion (34%) and weight management (28.3%). The main sources of information were the internet, health-care providers, and coaches. Male users depended primarily on the internet; however, female users received information from health-care providers (p < 0.001). Practicing exercise, non-smoking, and dietary patterns were associated with DS use. CONCLUSION: DS use is remarkably common among college students in Egypt since their freshmen year. The findings highlight an urgent need to raise students’ awareness regarding the appropriate use of DS from reliable sources to control DS use and prevent adverse effects

    Validated Spectrophotometric Methods for the Determination of Oxybuprocaine Hydrochloride

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    Simple, rapid, accurate and reliable spectrophotometric methods were developed and validated for determination of Oxybuprocaine hydrochloride (OXY) in pure form and in pharmaceutical preparation. The methods depend on charge transfer reaction of OXY as n-electron donor with p-chloranilic acid (p-CA), 2, 3 – dichloro 5, 6 – dicyano 1, 4 benzoquinone (DDQ) and iodine as π and σ acceptors, respectively. These reactions were studied under various conditions and the optimum parameters were selected. Under the optimum reaction conditions, linear relationships with good correlation coefficients (0.9996, 0.9997, and 0.9998) were found between absorbance of the formed complexes and concentrations of OXY in the range of 20.0 - 220.0 μg/mL, 10.0-80.0 μg/mL and 4.0-44.0 μg/mL for (p-CA), DDQ and iodine methods, respectively. The methods were successfully applied for the determination of OXY in pure form and in dosage form. Job’s method was applied to determine the stoichiometry of the reactions. No significant difference was found at p = 0.05 when the obtained results of the proposed methods were statistically compared with those obtained by an official method

    Physiological effects of diatomaceous earth on Mentha viridis plants grown under drought conditions

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    This study was carried out during 2012 and 2013 seasons at the experimental farm of Medicinal and Aromatic Plants Research Department in El-Kanater El-Khairia. The investigation aimed to study the effect of irrigation at 25, 50 and 100% from field capacity (FC) combined with diatomaceous earth (DDM) at 0, 2 and 4 g/10 kg soil in order to regulate water irrigation and to study their effect on vegetative growth and volatile oil production of spearmint plants (Mentha viridis L.). The obtained results are summarized as follows: in all cuts in the two seasons, the plants received DDM at 4 g/10 kg soil + 100% FC, showed stimulation in growth characters, i.e plant height, branching, fresh and dry weights of spearmint plants.Although the highest volatile oil percentage/plant through the two seasons was achieved when the plants were treated with 25% and 50% FC but the volatile oil yield was the highest at 4 g DDM /10 kg soil + 100% FC. The highest percentage of Carvone (the main component of the volatile oil) was produced with 4 g DDM/10 kg soil +100% FC.Proline content was decreased with increasing irrigation and diatomaceous earth rate, this refers to response of mint plants to treated by diatomaceous earth with the irrigation at 50% or 100% FC and not exposed to stress at 25% FC compared to the control (the highest proline content)

    COMBINED USE OF HYALURONIC ACID WITH NANO-BIOACTIVE GLASS ENHANCED BIOCEMENT BASED SILICATE STIMULATED BONE REGENERATIVE CAPACITY IN TIBIAL BONE DEFECTS OF RABBITS: IN-VIVO STUDY

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    An ideal biomaterial for bone regeneration is a longstanding quest nowadays. This study aimed to evaluate the osteogenic potentiality of nano-bioactive glass enhanced biocement based silicate with or without hyaluronic acid seeded in rabbits’ tibial bone defects. For this, 24 male rabbits with two 5 mm defects (1 defect per tibia) were divided into three equal groups. Among the predefined three groups, for the rabbits of group 1(control) bone defects were left untreated while for the members of group 2 defects received nano-bioactive glass enhanced biocement based silicate cement, and group 3 defects received nano-bioactive glass cement mixed with hyaluronic acid. Animals of each group were divided equally for euthanization after 3 and 6 weeks. Bone specimens were processed and examined histologically with histomorphometrically analysis of new bone area percentage. The bone defects in group 3 showed significantly improved osseous healing histologically as compared to the group 1&2. The morphometric analysis also revealed a significant increase in the new bone area percentage in group 3 as compared to the group 1 and 2 (P < 0.05). The results of the present study can be concluded that bone defects could be treated with nano-bioactive glass and hyaluronic acid cement. Although, nano-bioactive glass alone was capable of bone regeneration the combination of both had significant regenerative capacity

    Zip Property on Malcev-Neumann Series Modules

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    Let R be a ring, MR a right R-module, G a totally ordered group, σ a map from G into the group of automorphisms of R which assigns to each x ∈ G an automorphism σ_x ∈ Aut(R), τ a map from G × G to U(R) (the group of unit elements of R) and M((G; σ ; τ)) the Malcev-Neumann series module. Then, under some certain conditions, we show that MR is a right zip R-module if and only if M((G; σ ; τ))_{R((G;σ ;τ))} is a right zip R((G; σ ; τ))-module, where R((G; σ ; τ)) is the Malcev-Neumann series ring
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