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Search Results: 1 - 10 of 640 matches for " Ahlam Salih Eltahir "
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Pharmacognostical Study of the Fruit Peels of Punica granatum  [PDF]
Rofidah Yasen Ahmed Diab, Ahlam Salih Eltahir
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105687
Abstract:
This study deals with Punica granatum fruit peels. This plant was selected because of its popularity and being highly used; it was purchased from herbarium markets of Khartoum Sudan. The study is divided into two parts, the main part is a morph-anatomical study of the fruit peels of the plant because it is important in the identification of the medicinal plant when it is in the powder or broken forms. The preparation of permanent slides was done using wax methods. The results of the morph anatomical studies were described and shown in photomicrographs. Transverse section of the peels of the fruits of P. granatum is formed of one cell thick epidermis covered by a thin cuticle, followed by many layers of small compact parenchyma cells forming pigment layer and several cell thick isodiametric spongy parenchyma cells filling the section. Vascular bundles are small distributed within the ground parenchyma cells; sclerenchyma cells in the form of stone cells were densely distributed on the section of the peel of fruit. Part two includes physiochemical studies of the powder of the fruit peel to determine the percentage values of moisture, ash, acid insoluble ash, alcohol soluble extractives, and water soluble ash.
Comparative Anatomical Study of the Stems and Leaflets of Tribulus longipetalous, T. pentandrus and T. terrestris (Zygophyllaceae)  [PDF]
Hatil Hashim Elkamali, Ahlam Salih Eltahir, Ibrahim Saeed Yousif, Ahmed Mohamed Haroun Khalid, Elneel Adam Elneel
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102810
Abstract:
In this study the anatomical characters of the stems and leaflets of T. longipetalous Viv., T. pentandrus Benth. and T. terrestris L. were compared to assist as a relevant source of information and contribute towards the standards to dispose the quality and identity of these plants to avoid adulterations. Transverse sections of the stems and leaf lets of the three species were done using wax method technique. The anatomical structures of the three studied species are very similar. The stems are formed of one layer epidermis, parenchymatous cortex, pericyclic fibers above the collateral vascular bundles, primary and secondary xylems and phloems, narrow medullary rays and wide parenchymatous pih. The densities of the epidermal hairs in the stems are found to be larger in T. pentandrus followed by T. longipetalous and lastly T. terrestris. There are sclrenchymatous fibres in the pith of T. longipetalous and T. pentandrus but not in T. terrestris. The leaflets are dorsiventral, showing kranz structure and different types of hairs. The densities of the epidermal hairs in the leaflets are found to be larger in T. longipetalous followed by T. pentandrus and lastly T. terrestris.
Morph-Anatomical Studies and Antibacterial Activities of the Rhizome of Zingiber officinale Roscoe  [PDF]
Ahlam Salih Eltahir, Massara Ibrahem Elnoor, Sarrah Menahi, Eiman Mohammed Ali Mustafa
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104890
Abstract:
In this study, morphanatomical study and antibacterial activity of the rhizome of Zingiber officinale (Zingiberaceae) were investigated to assist as a relevant source of information and contribute towards the standards to dispose the quality and identity of this plant to avoid adulterations. The transverse section of the rhizome includes different types of tissues which are epidermis, cork, cortex and vascular bundles. The cortex is formed of parenchyma cells, which often contain starch and oils in large amounts. In vitro antibacterial activity was investigated by cork porous method. The most sensitive bacteria for all concentrations of the methanolic and only 50 mg/ml for the water extract was Staphylococcus aureus. Pseudomonas aeruginosa was found to be sensitive for both extracts used. Bacillus subtilis was sensitive for the methanolic extract only. Escherichia coli was found to be not sensitive except for 100 mg/ml concentration of the methanolic extract.
Nutritional Status of Mothers and Its Determinants in Alemtidad Area, Khartoum  [PDF]
Waled Amen Mohammed Ahmed, Eiman Abdalla Ahmed, Khalid Ahmad Omar Arafa, Ehab Ibrahim Salih El-Amin, Ziad M. Alostaz, Khalid Eltahir Khalid
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.522233
Abstract: Background: Nutritional status of mothers is considered one of the major problems facing mothers in the world. The nutrition plays a major role in mothers and child health. Objective: This study aims to assess mothers’ nutritional status and its determinants in Alemtidad area, Khartoum. Methods: A descriptive community based survey was conducted in the Alemtidad area of Khartoum between November 2012 and December 2012. One hundred and eighty mothers were selected by simple randomization. Data were collected by using structured designed questionnaire which was then analyzed by (SPSS) program version 20. Results: The study conducted among mothers in Alemtidad area; their age ranged between 19 and 86 years with the mean age 38 ± 12 years. From those mothers about half were unemployed, and having mainly primary and secondary educational level. 81.1% of mothers were not able to select the proper food according to age and nutrients and about 71.1% of mothers took two meals per day and 23.3% one meals per day, and only 5.6 take three meals per day. The Body Mass Index (BMI) was calculated to measure the nutrition status of mothers; this study shows that mothers in Alemtidad are mainly overweight and obese, 45.6% and 18% respectively and only 35% within normal range of Body Mass Index (BMI). Conclusion: The study concludes that mothers are either overweight or obese (45.6%, 17.7% respectively). Compared to national and international statistics the findings of this study reflect high Body Mass Index (BMI) of mothers in Alemtidad.
Optimality of Distributed Control for n × n Hyperbolic Systems with an Infinite Number of Variables  [PDF]
Ahlam Hasan Qamlo
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.36077
Abstract:

In this paper, we study the existence of solutions for 2l order (n × n) cooperative systems governed by Dirichlet and Neumann problems involving hyperbolic operators with an infinite number of variables and with variable coefficients. The necessary and sufficient conditions for optimality of the distributed control with constraints are obtained and the set of inequalities that defining the optimal control of these systems are also obtained.

An Optimization Problem of Boundary Type for Cooperative Hyperbolic Systems Involving Schrödinger Operator  [PDF]
Ahlam Hasan Qamlo
Intelligent Control and Automation (ICA) , 2014, DOI: 10.4236/ica.2014.54028
Abstract: In this paper, we consider cooperative hyperbolic systems involving Schr?dinger operator defined on  Rn. First we prove the existence and uniqueness of the state for these systems. Then we find the necessary and sufficient conditions of optimal control for such systems of the boundary type. We also find the necessary and sufficient conditions of optimal control for same systems when the observation is on the boundary.
Content analysis of crisis communicative strategies: Tunisian protest vs. anti-Mubarak protest
Ahlam Alharbi
International Journal of Human Sciences , 2012,
Abstract: The paper explores the crisis communicative strategies (CCs) that the former Tunisian president, Zine El Abidine Ben Ali, and the former Egyptian president, Hosni Mubarak, used in response to the protests, which are considered as one of the most critical crises in their reigns. A content analysis was conducted to examine the three speeches each president delivered during the crisis event in order not only to protect their image but also to restore peace and order. The study aimed to address the following questions: What are the crisis response strategies they used to restore their (distorted) image? did these strategies change over the demonstration period? and are they appropriate to the crises? In so doing, the analysis probes the length as well as the number of words and sentences; the framing patterns that have been applied (logical vs. emotional), and the crisis communicative strategies applying Coombs’ (1999) communicative strategies model.
La imagen de la madre en el refranero espa ol y jordano. Estudio de Paremiología comparada
Ahlam Sbaihat
Oceánide , 2013,
Abstract: Using Spanish and Jordanian proverbs, this paper investigates the role of women in society. Specifically, it analyzes the role and archetypes of the mother in Spanish and Jordanian proverbs in order to identify paremiological similarities and differences between the two cultures that appear to be different. The aim is to define the social imagination for the mother in the context of role transformation and in contrast with the roles of husband, son and brother, in two societies which might be occasionally associated with sexist and /or rural ideologies.
Analytical Evaluation of Energy and Electron Concentrations in Quantum Wells of the High Electron Mobility Transistors  [PDF]
Salih Saygi
Open Journal of Applied Sciences (OJAppS) , 2014, DOI: 10.4236/ojapps.2014.43014
Abstract: In this letter we propose analytical evaluation method for the electron density and the energy density in multi-layered high electron mobility transistors (HEMTs). The algorithm is used to simulate the variation of the electron density and the energy density against temperature of hetero-junction AlGaN/GaN. The proposed procedure guaranties the reliable application of the contribution of multi-layered HEMTs structure. In conclusion, the obtained results are estimated and discussed.
Bacterial Contamination of Drinking Water in the Internally Displaced People Camps in South Darfur, Sudan  [PDF]
Yassir Mohammed Eltahir, Amira Ahmed Abdelrahman
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2013, DOI: 10.4236/cweee.2013.22B002
Abstract: A total of 240 water samples were collected during the three seasons of 2009 from different sites and sources in the internally displaced camps (IDP) including bore holes, hand pumps, dug wells, water points, water reservoir and household storage containers. Samples were investigated using the most probable number method to detected and count the total coliform, faecal coliform and faecal enterococci. Enteric bacteria detected were E. coli, Enterococcus faecalis, Klebsiella, Citrobacter and Enterobacter .House hold containers showed continuous level of contamination by all different bacteria throughout the three seasons. This was followed by hand pumps, both reservoir and boreholes and dug wells. Water points revealed no level of contamination throughout the three seasons.
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