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Thriving green havens in baking deserts:Plant diversity and species composition of urban plantations in the Sahara Desert

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Journal of Arid Land 2024年第9期16卷 1270-1287页

作者： mohammed SOUDDI Haroun CHENCHOUNI M'hammed BOUALLALA Laboratory of Saharan Natural Resources Faculty of Nature and Life SciencesUniversity of Ahmed Draia-AdrarAdrar 01000Algeria Laboratory of Algerian Forests and Climate Change Higher National School of ForestsKhenchela 40000Algeria Laboratory of Natural Resources and Management of Sensitive Environments University of Oum El BouaghiOum El Bouaghi 04000Algeria Higher School of Saharan Agriculture Adrar 01000Algeria

Hot arid zones represent vital reservoirs of unique species and ecosystems,holding significant importance for *** study aimed to explore the plant diversity associated with tree plantations in urban ecosystems under hyper-arid climatic conditions in the Sahara Desert of *** May 2022,30 quadrats measuring 1 m^(2) each were established at the base of Phoenix dactylifera,Leucaena leucocephala,and Tamarix aphylla,corresponding to the dominant tree species in each of three *** each quadrat,the plant quantitative inventory was conducted to measure plant diversity and similarity among the studied *** on this,we assessed the plant functional traits and rarity/abundance status of the *** findings revealed a diverse flora associated with the studied plantations,comprising 29 plant species grouped into 27 genera and 12 ***,Poaceae(accounting for 30.8% of the flora),Asteraceae(25.0%),and Zygophyllaceae(21.6%)were *** an overall density of approximately 555 individuals/m^(2),Zygophyllum album(120 individuals/m^(2))and Polypogon monspeliensis(87 individuals/m^(2))emerged as the most abundant *** trait analysis underscored the pivotal role of therophytes(constituting over 50.0% of the flora)and anemochorous species(33.0%-62.5%).Phytogeographic analysis emphasized the prevalence of the Saharo-Arabic element(constituting over 31.0% of the flora)and the Mediterranean Saharo-Arabic element(9.5%-21.5%).The Cosmopolitan element thrived under disturbance factors,recording percentages from 13.0% to 20.0% of the plant *** rarity/abundance status of the flora emphasized the significance of rare,common,and very common species in the studied *** findings could provide fundamental data for the effective control and management of biodiversity in hot hyper-arid urban ecosystems.

关键词： urban plantations plant diversity plant functional traits rarity/abundance status Sahara Desert Algeria

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Effect of ankle versus thigh tourniquets on post-operative pain in foot and ankle surgery

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World Journal of Orthopedics 2024年第2期15卷 163-169页

作者： Ashish Mishra ahmed Barakat Jitendra Mangwani Jakub Kazda Sagar Tiwatane Sana mohammed Aamir Shaikh Linzy Houchen-Wolloff Vipul Kaushik Department of Trauma and Orthopedics University Hospitals LeicesterLeicester LE15WWUnited Kingdom Department of Trauma and Orthopedics Leicester University Hospitals-NHS TrustLeicester LE15WWLeicestershireUnited Kingdom Academic Team of Musculoskeletal Surgery University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom Department of Anaesthesia York&Scarborough Teaching Hospitals NHS Foundation TrustNorth Yorkshire YO318HEUnited Kingdom Department of Anaesthesia Royal Free London NHS TrustLondon NW32QGUnited Kingdom Department of Trauma&Orthopaedics Breach Candy Hospital TrustMumbai 400026India Department of Physiotherapy University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom Department of Anasthesia University Hospitals of Leicester NHS TrustLeicester LE15WWUnited Kingdom

BACKGROUND Tourniquets are commonly used in elective extremity orthopaedic surgery to reduce blood loss,improve visualization in the surgical field,and to potentially reduce surgical *** is a lack of consensus in existing guidelines regarding the optimal tourniquet pressure,placement site,and duration of *** is a paucity of data on the relationship between the site of a tourniquet and postoperative pain in foot and ankle *** To explore the relationship between tourniquet site and intensity of post-operative pain scores in patients undergoing elective foot and ankle *** Retrospective analysis of prospectively collected data on 201 patients who underwent foot and ankle surgery in a single institution was *** tourniquet duration,tourniquet pressure and site,and postoperative pain scores using Visual Analogue Score were collected in immediate recovery,at six hours and at 24 h *** plots were used to analyse the data and to assess for the statistical correlation between tourniquet pressure,duration,site,and pain scores using Pearson correlation *** All patients who underwent foot and ankle surgery had tourniquet pressure of 250 mmHg for ankle tourniquet and 300 mmHg for *** was no correlation between the site of the tourniquet and pain scores in recovery,at six hours and after 24 *** was a weak correlation between tourniquet time and Visual Analogue Score immediately post-op(r=0.14,P=0.04)but not at six or 24 h *** This study shows that there was no statistically significant correlation between tourniquet pressure,site and postop pain in patients undergoing foot and ankle *** choice of using a tourniquet is based on the surgeon's preference,with the goal of minimizing the duration of its application at the operative site.

关键词： Lower limb surgery Tourniquet time Tourniquet pressure Tourniquet site Post-operative pain Pain scores

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Magnetic Field Effect and Heat Transfer of Nanofluids within Waveform Microchannel

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Computer Modeling in Engineering & Sciences 2023年第3期134卷 1957-1973页

作者： Mehdi Moslemi Motahare Mahmoodnezhad S.A.Edalatpanah Sulima ahmed mohammed Zubair Hamiden abd el-Wahed Khalifa Ayandegan Institute of Higher Education TonekabonIran Department of Mathematics College of Science and ArtsQassim UniversityAr RassSaudi Arabia Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGizaEgypt

In this research,a numerical study of mixed convection of non-Newtonian fluid and magnetic field effect along a vertical wavy surface was investigated.A simple coordinate transformation to transform wavy surface to a flat surface is employed.A cubic spline collocation numerical method is employed to analyze transformed *** effect of various parameters such as Reynolds number,volume fraction 0-,Hartmann number,and amplitude of wave length was evaluated in improving the performance of a wavy *** to the presented results,the sinusoidal shape of the microchannel has a direct impact on heat *** increasing the microchannel wave amplitude,the Nusselt number has *** the other hand,increasing the heat transfer in the higher wavelength ratio corrugated channel is seen as an effective method of increasing the heat transfer,especially at higher Reynolds *** results showed that with increasing Hartmann numbers,the flow line near thewall becomesmore regular and,according to the temperature gradient created,theNusselt number growth.

关键词： Heat transfer magnetic field nano fluid vorticity wavy micro channel

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Spectrofluorimetric and Spectrophotometric Stability- Iwndicating Methods for the Analysis of Veralipride in Presence of Its Degradants and in Spiked Human Plasma

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Chinese Journal of Chemistry 2012年第1期30卷 183-189页

作者： Salama,Nahla Nour el Din ahmed Salem,Maissa Yacoub abd el Halim,Lobna mohammed abdel Fattah,Laila EI-Sayed National Organization for Drug Control and Research(NODCAR) 6 Abu Hazem StreetPyramids AveP.O.Box 29GizaEgypt Analytical Chemistry Department Faculty of PharmacyCairo UniversityCairoEgypt Analytical Chemistry Department Faculty of PharmacyMisr University for Science and Technology6th of OctoberEgypt

Spectrofluorimetric and spectrophotometric stability-indicating methods were developed and validated for analysis of veralipride （Ver） in presence of its hydrolytic and oxidative degradants. The spectrofluorimetric method was based on direct measurement of the intrinsic fluorescence of Ver at 366 nm after excitation at 299 nm using sodium lauryl sulfate （SLS） as micelle enhancer. The fluorescence intensity plot was linear over the concentration range 1.0-10.0 ***-1. The high sensitivity of the method allowed its successful application to the analysis of Ver in spiked human plasma. Two other methods were developed. They are based on the oxidative coupling reac- tion of Vet with 3-methyl benzothiazolin-2-one hydrazone （MBTH） hydrochloride in presence of ceric ammonium sulphate in an acidic medium. The first method depends on spectrophotometric measurement of the stable green colored oxidative coupling product at 660 nm. The different experimental parameters affecting the reaction were optimized. Linearity range is 10.0--100.0 ~tgomL-1. The second method depends on a fluorescence quenching effect of Vet on the fluorescence of Ce3＋. The difference in fluorescence intensity was measured at 380 nm after excitation at 300 nm. This method is applicable over the concentration ranges 0.25-2.50 pg-mL-1. The methods were validated according to the ICH guidelines. They were successfully applied for the analysis of Ver in drug substance, drug product and in laboratory prepared mixtures containing different percentages of hydrolytic and oxidative degradants.

关键词： veralipride micelle-enhanced fluorescence MBTH validation stability fluorescence quenching Ce3+

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Mental Health Consequences among Sudanese Due to the Armed Conflicts and Civil Unrest of 2023: One Year Later

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Journal of Biosciences and Medicines 2024年第4期12卷 21-37页

作者： Sahar Moawia Balla elnour Nahla Yousif Osman mohammed Saeed Awadia Babiker mohammed Osman Abeer Alawad Hassan Eman Mohamed Nour Hamad Alneel Mustafa Rowa abdelmonem Sidig Hamato Malaz Mohamed Khair Alsafi Mohamed Amna Alnaim Mohamed ahmed Osman Awab abdelbagi Mustafa ahmed Jalal abdelrasool Hassan eltaib Department of Family Medicine Health Gates Riyadh Saudi Arabia Family Medicine Department Ultracare Home Health Care Riyadh Saudi Arabia Psychiatic Department Erada Hospital and Mental Health Alkharj Saudi Arabia Family Medicine Department Ahmed Gasim Diabetic Center Portsudan Sudan QCHP Qatar Qatar Primary Care Najran Health Cluster Najran Saudi Arabia Emergency Department Best Care Hospital Khartoum Sudan Family Medicine Department Mouwasat Hospital Khobar Saudi Arabia

Aim: To investigate depression, anxiety, PTSD, and insomnia levels among Sudanese citizens after a year has passed since the start of Armed Forces conflict in Sudan. Methods: An online survey was distributed. It is composed of five parts, covering the following areas: 1) sociodemographic data;2) depression assessment;3) generalized anxiety disorder assessment;4) post-traumatic stress disorder assessment;and 5) insomnia assessment. Statistical Package for Social Sciences version 27 was used for data analysis;frequency and percentage were used to describe the qualitative variables. Spearman’s correlation analysis and Chi-square test were used for correlation and association analysis;a P-value equal to or less than 0.05 was considered statistically significant. Results: The study included 283 participants, primarily female (76.0%), with a mean age of 35.26 ± 6.96 years. The majority of participants were married (50.5%) and had a university level of education (50.2%). At the start of the war, 70.3% of participants were inside the war zones, and at the time of data collection, 73.5% were outside Sudan. The length of stay in the war zone ranged from 1 to 300 days, with a mean of 48.59 ± 70.284 days. Additionally, 63.3% of participants stated that they did not receive any form of mental health intervention, and the remaining did not provide an answer. There was a high prevalence of moderate-severe depression (50.5%), moderate anxiety (35.3%), PTSD (56.5%), and sub-threshold insomnia (53.4%) among the participants. Correlation analyses revealed associations between demographic factors such as sex, age, marital status, and education and mental health issues. Notably, female participants showed a higher prevalence of PTSD (53.0%) compared to male participants (67.6%). Conclusions: There is a substantial impact of war-related trauma on mental health, revealing a high prevalence of moderate-severe depression, moderate anxiety, PTSD, and sub-threshold insomnia among the particip

关键词： Sudan War Conflict Mental Health

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The future of competitive advantage in Oman: Integrating green product innovation, Al, and intellectual capital in business strategies

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International Journal of Innovation Studies 2024年第2期8卷 154-171页

作者： Fadi abdelfattah mohammed Salah Khalid Dahleez Riyad Darwazeh Hussam Al Halbusi Modern College of Business and Science(MCBS) MuscatOman Dean College of Business Administration A'Sharqiyah UniversityIbraOman Head of Accounting Department Business SchoolAl-Ahliya Amman UniversityAmmanJordan Management Department Ahmed Bin Mohammed Military College(ABMMC)DohaQatar

This study delves into the dynamics of green product innovation,artificial intelligence(Al)adaption,and intellectual capital,investigating their impact on the competitiveness of firms in *** emphasizes the crucial role of government intervention and R&D investments in this *** on the responses of 214 top managers in Oman,the research employs structural equation modeling to analyze the intricate relationships between these *** findings underscore a significant positive correlation between green innovation,Al implementation,and intellectual capital,with government involvement and R&D investments as vital *** study provides a novel perspective on the synergy of technology,innovation,and intellectual capital in developing *** offers essential insights for business leaders,policymakers,and scholars,highlighting the necessity of integrating advanced technologies and sustainable practices in business strategies to achieve competitive *** research adds to the existing body of knowledge on innovation and *** offers practical implications for enhancing firm performance in Oman and similar emerging markets.

关键词： Green product innovation R&D investments AI adoption Intellectual capital Government involvement Knowledge-driven culture Oman

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Performance evaluation of a WDM/OCDM based hybrid optical switch utilizing efficient resource allocation

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Chinese Optics Letters 2014年第5期12卷 5-10页

作者： ahmed Nabih Zaki Rashed abd-elnaser A. mohammed Osama M.A. Dardeer electronics and electrical Communication Engineering Department Faculty of Electronic EngineeringMenofia University

A hybrid optical switch （HOS） with physical layer of wavelength division multiplexing and optical code division multiplexing （WDM/OCDM） scheme is proposed. An additional feature to the HOS than optical cross connect （OXC） is that the controller can process requests for both circuit establishment and burst scheduling. In our study, the measurement criteria of HOS are the blocking probability, probability of error, and probability of outage. To simplify the analysis, no distinction is made between a circuit in progress and a burst in progress. Moreover, a minimum fit （MinF） resource allocation strategy is applied in order to increase the bandwidth efficiency and control the multiplexing interference of the OCDM. A 2D Markov model for the HOS is presented using the MinF strategy. Numerical results reveal that the code parameters and the resource allocation strategy greatly affect the performance. Certain periority can be achieved by assigning shorter codes to high periority users and longer codes to low periority users. Also, the probability of error and outage are reduced bv aonling the MinF strategy.

关键词： WDM Performance evaluation of a WDM/OCDM based hybrid optical switch utilizing efficient resource allocation

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Impact of referral pattern and timing of repair on surgical outcome after reconstruction of post-cholecystectomy bile duct injury:A multicenter study

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Hepatobiliary & Pancreatic Diseases International 2021年第1期20卷 53-60页

作者： Ayman el Nakeeb Ahmad Sultan Helmy Ezzat Mohamed Attia Mohamed abd elWahab Taha Kayed Ayman Hassanen Ahmad AlMalki ahmed Alqarni mohammed M mohammed Gastrointestinal Surgical Center Mansoura UniversityMansouraEgypt Minia University Hospital MiniaEgypt Aseer Central Hospital Aseer regionSaudi Arabia

Background:Bile duct injury(BDI)after cholecystectomy remains a significant surgical *** guideline exists to guide the timing of repair,while few studies compare early versus late repair *** study aimed to analyze the outcomes in patients undergoing immediate,intermediate,and delayed repair of ***:We retrospectively analyzed 412 patients with BDI from March 2015 to January *** patients were divided into three groups based on the time of BDI *** 1 underwent an immediate reconstruction(within the first 72 hours post-cholecystectomy,n=156);group 2 underwent an intermediate reconstruction(from 4 days to 6 weeks post-cholecystectomy,n=75),and group 3 underwent delayed reconstruction(after 6 weeks post-cholecystectomy,n=181).Results:Patients in group 2 had significantly more early complications including anastomotic leakage and intra-abdominal collection and late complications including anastomotic stricture and secondary liver cirrhosis compared with groups 1 and *** outcome was observed in 111(71.2%)patients in group 1,31(41.3%)patients in group 2,and 157(86.7%)patients in group 3(P=0.0001).Multivariate analysis identified that complete ligation of the bile duct,level E1 BDI and the use of external stent were independent factors of favorable outcome in group 1,the use of external stent was an independent factor of favorable outcome in group 2,and level E4 BDI was an independent factor of unfavorable outcome in group *** BDI and level E4 BDI were independent factors of unfavorable ***:Favorable outcomes were more frequently observed in the immediate and delayed reconstruction of post-cholecystectomy *** ligation of the bile duct,level E1 BDI and the use of external stent were independent factors of a favorable outcome.

关键词： Bile duct injury Hepaticojejunostomy Anastomotic stricture Biloma Biliary peritonitis

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Effect of Diabetes Self-Management Education on Glycaemic Control in Sudanese Adults with Type 2 Diabetes

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Journal of Biosciences and Medicines 2024年第3期12卷 316-327页

作者： Sahar Moawia Balla elnour Tayseer abdelmotalib ahmed Taha Haiam abdalla Wadatalla Ziryab Zainelabdin Mohamed elmahdi Marwah Isam abdulmajeed mohammedahmed Rowa abdelmonem Sidig Hamadto Nahla Yousif Osman mohammed Saeed Omnia Mubarak Saad abdallah Sulafa abdelbagi Mustafa ahmed Hanady abdelhameed ahmed Mohamed Sarah Khalil Fathi Khalil Family Medicine Health Gates Primary Care Riyadh SAU Family Medicine Dhaman Health Assurance Hospitals Company Kuwait KWT Family Medicine First Health Cluster Riyadh SAU Emergency Department Sheikh Khalifa Medical City Abudahbi ARE Family Medicine University of Medical Sciences and Technology Khartoum SDN Family Medicine Sudan Medical Specialization Board-Sudan Khartoum SDN Family Medicine Ultra Care Home Care Company Riyadh SAU Medicine Department Health Gates Primary Care Riyadh SAU Family Medicine Mouwasat Hospital Madinah SAU

Research Background: The high prevalence of diabetes in Sudan, estimated at 16%, highlights the importance of effective health education in diabetes management. Diabetes self-management education has been identified as a crucial tool in enhancing the knowledge, attitudes, and abilities necessary for self-management among individuals with diabetes. Aim: To assess the impact of diabetes self-management education on medication adherence and glycemic control in Sudanese adults with type 2 diabetes before and 3 months after the DSME intervention. Method: The study was conducted in Sudan between September 2022 and March 2023, it was an interventional, one-group, pre- and post-test study that aimed to assess the impact of diabetes self-management education (DSME) on medication adherence and diabetes control in Sudanese adults with type 2 diabetes. The research was conducted in primary health care centers in six cities in Sudan and involved 244 participants. The data entry and statistical analysis were conducted using the Statistical Package for Social Sciences version 27.0. A paired t test was used for analysis. Results: The study included 244 participants, 67% of whom were males. The age mean ± SD was 48.6 ± 9.3 years, and 85.3% of participants were married. Age at onset of diabetes mean ± SD was 40.60 ± 7.81 years;44.6% had diabetes for less than 5 years;and 84.1% had a positive family history of diabetes mellitus. The levels of poor, low, and partial adherence to medication decreased by 8.2%, 4%, and 20.6%, respectively, after the intervention. The levels of good and high medication regime adherence increased by 13% and 19.8%, respectively;BMI decreased by 1.1 ± 0.73 kg/m2 (p = 0.005). The fasting blood sugar decreased by 69 ± 32.9 mg/dl (p = 0.049), and the glycated hemoglobin decreased by 1.21 ± 0.28% (p = 0.001). Conclusions: The findings of this study reinforce the importance of patient education in improving glycemic control and enhancing self-management

关键词： Sudan Adherence Intervention Education Self-Management Diabetes

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Assessing the Impact of Regulations on Radiation Safety Culture and Practices in Radiology Departments

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Journal of Applied Mathematics and Physics 2024年第8期12卷 3006-3016页

作者： Saad Alqahtani Khaled Soliman Khaled Altuwayjiri mohammed Al Shehri Yahya Jubran Alwaleed Al Hussein Nawaf Alanazi Nawaf Alanazi Fahad Alqarni Hela Alqahtani ahmed Jowana Radiodiagnostic and Medical Imaging Department Prince Sultan Military Medical City Riyadh Saudi Arabia Medical Physics Department Prince Sultan Military Medical City Riyadh Saudi Arabia Radiology Department King Abdullah Bin Abdulaziz University Hospital Riyadh Saudia Arabia Radiology Department Prince Sultan Cardiac Center Riyadh Saudia Arabia Radiology Department Durma General Hospital Riyadh Saudi Arabia Nursing Department Alquwayiyah Primary Health Care Riyadh Saudi Arabia

Background: The need to establish a strong culture around radiation safety is derived from the assertion that medical practitioners, patients, and third parties should not be exposed to unnecessary radiation. Authorities have endeavored to enact policies to protect all employers and patients in radiology departments. Objectives: To assess the impact of radiation safety practices and regulations on the ongoing improvements in radiation safety culture and practices in radiology departments. This will be achieved through a subjective assessment of national and international rules and regulations by healthcare professionals. Materials and Methods: We conducted a questionnaire survey in the radiology departments of three JCI-accredited hospitals in the Riyadh region to identify and assess the impact of national radiation regulations and the accompanying processes on the improvement of radiation safety culture and practices in radiology departments. Results: There were statistically significant differences in the grading system results among various groups of respondents, based on their educational level. Also, there are statistically significant differences between the assessments of safety level results in the answers provided by various groups of respondents according to education level in favor of the master’s degree. Conclusion: The study concludes that technicians with a diploma degree require stricter regulation. Furthermore, the results of this study suggest that an exposure tracking system and a regulatory action supporting it may be useful in the ongoing task of improving patients’ radiation safety.

关键词： Impact Radiation Safety Culture Regulations Accreditation Practice Radiology Departments

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