oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 63 )

2019 ( 273 )

2018 ( 316 )

2017 ( 263 )

Custom range...

Search Results: 1 - 10 of 59738 matches for " Ahmed Y.;Nebie "
All listed articles are free for downloading (OA Articles)
Page 1 /59738
Display every page Item
Antiacetylcholinesterase and antioxidant activity of essential oils from six medicinal plants from Burkina Faso
Martin Kiendrebeogo,Ahmed Y. Coulibaly,Roger C. H. Nebie,Boukaré Zeba
Revista Brasileira de Farmacognosia , 2011,
Abstract: In this investigation, we evaluated essential oils from six medicinal plants from Burkina Faso for their antiacetylcholinesterase and antioxidant abilities. The chemotype of most active were also determined. The best antiacetylcholinesterase activities were recorded for the essential oils of Eucalyptus camaldulensis (IC50 18.98 μ g/mL) and Ocimum canum (IC50 36.16 μ g/mL). Their chemotype have been related to the 1,8-cineole one. Both essential oils demonstrated a linear mixed non competitive inhibition. The essential oil of Ocimum basilicum which belong to the linalool-eugenol chemotype exhibited the best radical scavenging activity (IC50 3.82 μ g/mL) and reducing power (531.75 mg AAE/g). In comparison with gallic and ascorbic acids, O. basilicum essential oil evidenced interesting antioxidant activities. The antiacetylcholinesterase and antioxidant activities of essential oils were discussed in regard with their chemical composition.
Antiacetylcholinesterase and antioxidant activity of essential oils from six medicinal plants from Burkina Faso
Kiendrebeogo, Martin;Coulibaly, Ahmed Y.;Nebie, Roger C. H.;Zeba, Boukaré;Lamien, Charles E.;Lamien-Meda, Aline;Nacoulma, Odile G.;
Revista Brasileira de Farmacognosia , 2011, DOI: 10.1590/S0102-695X2011005000008
Abstract: in this investigation, we evaluated essential oils from six medicinal plants from burkina faso for their antiacetylcholinesterase and antioxidant abilities. the chemotype of most active were also determined. the best antiacetylcholinesterase activities were recorded for the essential oils of eucalyptus camaldulensis (ic50 18.98 μ g/ml) and ocimum canum (ic50 36.16 μ g/ml). their chemotype have been related to the 1,8-cineole one. both essential oils demonstrated a linear mixed non competitive inhibition. the essential oil of ocimum basilicum which belong to the linalool-eugenol chemotype exhibited the best radical scavenging activity (ic50 3.82 μ g/ml) and reducing power (531.75 mg aae/g). in comparison with gallic and ascorbic acids, o. basilicum essential oil evidenced interesting antioxidant activities. the antiacetylcholinesterase and antioxidant activities of essential oils were discussed in regard with their chemical composition.
CT-Guided Lumbar Facet Joint Infiltration: Accessibility, Accuracy and Functional Outcome  [PDF]
Ahmed Elsayed, Walaa Y. Elsabeeny
Open Journal of Modern Neurosurgery (OJMN) , 2019, DOI: 10.4236/ojmn.2019.92012
Abstract: Background: Pain generated from lumbar facet joint affection is considered a common cause of low back pain. Image-guided facet joint infiltration is performed to reduce pain severity and to confirm its source. Aim: The objective of this study is to assess the accessibility, and accuracy and to evaluate the functional outcome of the CT-guided lumbar facet joint infiltration in management of low back pain. Subjects and Methods: This retrospective study included thirty four patients. All patients were diagnosed with low back pain due to lumbar facet syndrome. Adequate conservative therapy failed to improve the patient’s symptoms. Totally, 81 lumbar facet joints were treated by CT-guided intra-articular infiltration. Mean time of hospital stay was 6 - 8 hours. In the procedure technique, measures were applied to reduce the patients’ radiation exposure. The response to treatment was evaluated by the visual analogue scale (VAS) before procedure and at follow-up visits. Results: Among 34 adult patients included in this study, 26 were males and 8 were females. The mean age was 49.5 ± 8.5 years. Mean Duration of low back pain on admission was 8.2 ± 3.5 months. Bilateral CT-guided intra-articular infiltration was performed in 23 patients (67.5%). Assessing the response after facet joint infiltration, 82.4% of the patients showed immediate pain improvement after the procedure; 85.3% of the patients reported pain relief after 1 month and 67.6% at 12 month follow up. There was a statistically significant relief of pain after the intervention at 12 month follow up (p < 0.001). Conclusion: Lumbar Facet joint infiltration guided with CT scanning seems to be a reliable and safe procedure for low back pain management. Beside immediate and long term pain relief achieved using this minimally invasive technique; CT guidance provides an accessible and accurate route for the needle with low radiation dose exposure.
Gate Lip Hydraulics under Sluice Gate  [PDF]
Ahmed Y. Mohammed, Moayed S. Khaleel
Modern Instrumentation (MI) , 2013, DOI: 10.4236/mi.2013.21003
Abstract:

This paper present the effect of the lower gate lip on the coefficient of contraction, velocity and discharge which have been made in a rectangular flume with four gates opening from (2 to 4.5) cm, five different discharges from (6.2 to 18.15) l/s and five different gate cases (vertical and inclined vertically) by angle (45with and opposite flow direction with horizontal and sharp lower lip. The values of coefficients of contraction (Cc) and discharge (Cd) increases when gate slope increases with flow direction and the lower lip is horizontal, these increases are (16)% and (18)% respecttively, while these values decreases when gate slope increases opposite flow direction and the lower lip is horizontal these decreases are (13)% and (11)% respectively. The values of coefficient of velocity (Cv) remain constant and don’t effect with changes of gate slope or gate lip.

Design and Analysis of a Sliding Table Controller for Diabetes  [PDF]
Ahmed Y. Ben Sasi, Mahmud A. Elmalki
Intelligent Control and Automation (ICA) , 2013, DOI: 10.4236/ica.2013.43035
Abstract:

A discrete insulin infusion based on long-time interval measurement is the classic technique for diabetes treatment. Nevertheless, in this research, a closed-loop control system was proposed for continuous drug infusion to overcome the drawbacks of these typical discrete methods and develop more practical diabetes therapy systems. A blood glucose-insulin system was implemented relying on continuous insulin injection model. Based on this model, two controllers were designed to deal with the control dilemma of the resulting highly nonlinear plant. The controllers designed in this paper are: proportional integral derivative (PID), and sliding table controllers. Simulation results have shown that the sliding table controller can outperform the PID controller even with severe circumstances of disturbance in glucose, such as exercise, delay or noise in glucose sensor and nutrition mixed meal absorption at meal times.

A Fuzzy Controller for Blood Glucose-Insulin System  [PDF]
Ahmed Y. Ben Sasi, Mahmud A. Elmalki
Journal of Signal and Information Processing (JSIP) , 2013, DOI: 10.4236/jsip.2013.42015
Abstract:

Diabetes therapy is normally based on discrete insulin infusion that uses long-time interval measurements. Nevertheless, in this paper, a continuous drug infusion closed-loop control system was proposed to avoid the traditional discrete approaches by automating diabetes therapy. Based on a continuous insulin injection model, two controllers were designed to deal with this plant. The controllers designed in this paper are: proportional integral derivative (PID), and fuzzy logic controllers (FLC). Simulation results have illustrated that the fuzzy logic controller outperformed the PID controller. These results were based on serious disturbances to glucose, such as exercise, delay or noise in glucose sensor and nutrition mixed meal absorption at meal time.

Global attractor for the lattice dynamical system of a nonlinear Boussinesq equation
Ahmed Y. Abdallah
Abstract and Applied Analysis , 2005, DOI: 10.1155/aaa.2005.655
Abstract: We will study the lattice dynamical system of a nonlinear Boussinesq equation. Our objective is to explore the existence of the global attractor for the solution semiflow of the introduced lattice system and to investigate its upper semicontinuity with respect to a sequence of finite-dimensional approximate systems. As far as we are aware, our result here is the first concerning the lattice dynamical system corresponding to a differential equation of second order in time variable and fourth order in spatial variable with nonlinearity involving the gradients.
Upper semicontinuity of the attractor for lattice dynamical systems of partly dissipative reaction diffusion systems
Ahmed Y. Abdallah
Journal of Applied Mathematics , 2005, DOI: 10.1155/jam.2005.273
Abstract: We investigate the existence of a global attractor and its upper semicontinuity for the infinite-dimensional lattice dynamical system of a partly dissipative reaction diffusion system in the Hilbert space l2×l2. Such a system is similar to the discretized FitzHugh-Nagumo system in neurobiology, which is an adequate justification for its study.
Settlements Pattern and Functional Distribution in an Emerging Communities: A Case of a Local Government Area of Kwara State, Nigeria
Y.A. Ahmed
The Social Sciences , 2013,
Abstract: This study examines Ilorin South Local Government Area (LGA) of Kwara State, which in the recent time, carved out from city of Ilorin, Nigeria. The impression is that the new LGA, which had established a long string attachment with Ilorin may find it difficult to stand on its own. Settlements in an ideal situation exert good relationship with one another if they have common social and cultural links. But in Ilorin South LGA both infrastructural facilities and social amenities are elusively developed forcing workers to reside in Ilorin city. The study derives it data from the fieldwork-survey and observations and the data gathered were analyzed using Correlation and Nearest Neighbors Analyses. The findings revealed some remarkable achievements within a short while and the levels of new hierarchical settlement orders give the LGA a new unique description. The geographical distribution of the areas also indicated morphological patterns that result from a closed into random generation. Suggestions are put forward with desire to embarking on more regional development programmes.
An Analytical Study of the Demand for Money in Saudi Arabia
Ahmed Y. Abdulkheir
International Journal of Economics and Finance , 2013, DOI: 10.5539/ijef.v5n4p31
Abstract: Empirical studies on the demand for money have been the object of great attention by economists due to its central role in conducting monetary policy by making it possible for monetary authorities to effect desired and predictable changes in targeted macroeconomic variables such as income, interest rate and prices by appropriate changes in monetary aggregates. The present study sought to investigate the cointegrating property of money demand in Saudi Arabia by using annual data for the period 1987-2009 and applying the vector error correction model (VECM) technique. Findings indicate clearly the existence of a long run cointegration relationship between the demand for money (M2) and its explanatory variables, namely real GDP, the interest rate, the real exchange rate and the inflation rate. The error correction coefficient was found to be statistically significant and carries a minus sign as expected. The deviation of money demand from its long run value would be corrected in about a year and nine monthes.
Page 1 /59738
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.