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The impact of emergency department length of stay on the outcomes of trauma patients requiring hospitalization: a retrospective observational study

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World Journal of Emergency Medicine 2023年第2期14卷 96-105页

作者： ahmed Faidh Ramzee Ayman El-Menyar Mohammad Asim Ahad Kanbar khalid ahmed Bahaa Daoud Saji Mathradikkal Ahmad Kloub Hassan Al-Thani Sandro Rizoli Trauma Surgery Section Hamad General Hospital(HGH)Doha P.O Box 3050Qatar Clinical Research Trauma&Vascular Surgery SectionHGHDoha P.O Box 3050Qatar Clinical Medicine Weill Cornell Medical CollegeDoha P.O Box 3050Qatar

BACKGROUND: We aimed to explore the impact of the emergency department length of stay(EDLOS) on the outcome of trauma ***: A retrospective study was conducted on all trauma patients requiring hospitalization between 2015 and 2019. Patients were categorized into 4 groups based on the EDLOS(24 h). Data were analyzed using Chi-square test(categorical variables), Student’s t-test(continuous variables), correlation coefficient, analysis of variance and multivariate logistic regression analysis for identifying predictors of short EDLOS and hospital ***: The study involved 7,026 patients with a mean age of 32.1±15.6 years. Onefifth of patients had a short EDLOS(24 h were older(P=0.001) and had more comorbidities(P=0.001) and fewer deaths(P=0.001). Multivariate regression analysis showed that the predictors of short EDLOS were female gender, GCS, SI, hemoglobin level, ISS, and blood transfusion. The predictors of mortality were TTA-1(odds ratio [OR]=4.081, 95%CI: 2.364–7.045), head injury(OR=3.920, 95%CI: 2.413–6.368), blood transfusion(OR=2.773, 95%CI: 1.668–4.609), SI(OR=2.132, 95%CI: 1.364–3.332), ISS(OR=1.077, 95%CI: 1.057–1.096), and age(OR=1.040, 95%CI: 1.026–1.054). CONCLUSIONS: Patients with shorter EDLOS had different baseline characteristics and hospital outcomes compared with patients with longer EDLOS. Patients with prolonged EDLOS had better outcomes;however, the burden of prolonged boarding in the ED needs further elaboration.

关键词： Emergency department Length of stay Trauma Management Outcomes Trauma activation criteria

Ambient ammonia production via electrocatalytic nitrite reduction catalyzed by a CoP nanoarray

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Nano Research 2022年第2期15卷 972-977页

作者： Guilai Wen Jie Liang Qian Liu Tingshuai Li Xuguang An Fang Zhang Abdulmohsen Ali Alshehri khalid ahmed Alzahrani Yonglan Luo Qingquan Kong Xuping Sun Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Institute for Advanced Study Chengdu UniversityChengdu 610106China National Engineering Research Center for Nanotechnology No.28 East Jiang Chuan RoadShanghai 200241China Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah21589Saudi Arabia

Industrial-scale ammonia(NH_(3))production mainly relies on the energy-intensive and environmentally unfriendly Haber-Bosch *** issue can be avoided by electrocatalytic N_(2) reduction which however suffers from limited current efficiency and NH3 ***,we demonstrate ambient NH_(3) production via electrochemical nitrite(NO_(2)^(-))reduction catalyzed by a CoP nanoarray on titanium mesh(CoP NA/TM).When tested in 0.1 M PBS(pH=7)containing 500 ppm N0_(2)^(-),such CoP NA/TM is capable of affording a large NH_(3) yield of 2,260.7±51.5μg·h^(-1)·cm^(-2) and a high Faradaic efficiency of 90.0±2.3%at-0.2 V vs.a reversible hydrogen *** functional theory calculations reveal that the potential-determining step for NO_(2)^(-)reduction over CoP(112)is*NO2→*NO_(2)H.

关键词： CoP nanoarray NO_(2)^(-)reduction reaction ambient NH_(3)synthesis electrocatalysis density functional theory

Quantitative and Qualitative Responses of Hydroponic Tomato Production to Different Levels of Salinity

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1311-1323页

作者： khalid A.Al-Gaadi ahmed M.Zeyada ElKamil Tola Abdullah M.Alhamdan khalid A.M.ahmed Rangaswamy Madugundu Mohamed K.Edrris Department of Agricultural Engineering College of Food and Agriculture SciencesKing Saud UniversityRiyadh11451Saudi Arabia Precision Agriculture Research Chair Deanship of Scientific ResearchKing Saud UniversityRiyadh11451Saudi Arabia Chair of Dates Industry&Technology Deanship of Scientific ResearchKing Saud UniversityRiyadh11451Saudi Arabia Agricultural Research Centre Agricultural Engineering Research Institute(AEnRI)Giza12619Egypt

From economic and nutritional points of view,tomato is,historically,considered one of the most important *** signiﬁcant yield reduction,most commercial cultivars of tomato crops are sensitive to moderate levels of ***,high levels of salt stress can negatively affect the yield and quality of tomato ***,this study was conducted to evaluate the yield and fruit quality of three tomato cultivars(Forester,Ghandowra-F1,and Feisty-Red)cultivated hydroponically,under three different levels of nutrient solution *** of tomato fruits was performed based on quantity(number and weight of fruits,and total fruit yield),physical quality(color andﬁrmness),and chemical quality(refractometric index“Brix”,pH,EC,K^(+),Na^(+),and NO_(3)-).Experiments were conducted using three salinity levels of the nutrient solution with electrical conductivity values(dSm^(-1))of 2.5(control),6.0,and *** showed that the studied tomato cultivars were signiﬁcantly inﬂuenced by high salinity(9.5 dSm^(-1))in comparison to the low(2.5 dSm^(-1))and medium(6.0 dSm^(-1))levels of *** average,the highest fruit weight per plant of 1944.84 g and total fruit yield of 4.42 kgm^(-2) were observed at the low salinity level;however,no signiﬁcant differences were obtained in the two yield factors(single fruit weight and total fruit yield)for the low and medium salinity *** the other hand,a signiﬁcant reduction in tomato yield(31%)was associated with the high salinity level compared to the yield at low and medium salinity *** of physical quality parameters showed highly signiﬁcant differences among all salinity *** average,the maximum value of color change(1.72)was associated with the medium salinity level,and the maximum value ofﬁrmness(9.61 Ncm^(-1))was recorded at the high salinity *** levels and tomato cultivars introduced signiﬁcant differences in chemical quality parameters;however,no signiﬁcant differences in these

关键词： Quality cultivars yield color ﬁrmness brix

Secure and Reliable Routing in the Internet of Vehicles Network:AODV-RL with BHA Attack Defense

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 633-659页

作者： Nadeem ahmed khalid Mohammadani Ali Kashif Bashir Marwan Omar Angel Jones Fayaz Hassan School of Electronic Science Beijing University of Post and TelecommunicationBeijing100086China Department of Computer Science Huanggang Normal UniversityHuanggangChina Department of Computing and Mathematics Manchester Metropolitan UniversityManchesterUK Woxsen School of Business Woxsen UniversityHyderabad502345India Department of Computer Science and Mathematics Lebanese American UniversityBeirutLebanon Information Technology and Management Illinois Institute of TechnologyChicagoUSA College of Computing Capital Technology UniversityLaurelUSA

Wireless technology is transforming the future of transportation through the development of the Internet of Vehicles(IoV).However,intricate security challenges are intertwinedwith technological progress:Vehicular ad hoc Networks(VANETs),a core component of IoV,face security issues,particularly the Black Hole Attack(BHA).This malicious attack disrupts the seamless flow of data and threatens the network’s overall reliability;also,BHA strategically disrupts communication pathways by dropping data packets from legitimate nodes *** the importance of this challenge,we have introduced a new solution called ad hoc On-Demand Distance Vector-Reputation-based mechanism Local Outlier Factor(AODV-RL).The significance of AODVRL lies in its unique approach:it verifies and confirms the trustworthiness of network components,providing robust protection against *** additional safety layer is established by implementing the Local Outlier Factor(LOF),which detects and addresses abnormal network *** testing of our solution has revealed its remarkable ability to enhance communication in ***,Our experimental results achieve message delivery ratios of up to 94.25%andminimal packet loss ratios of just 0.297%.Based on our experimental results,the proposedmechanismsignificantly improves VANET communication reliability and *** results promise a more secure and dependable future for IoV,capable of transforming transportation safety and efficiency.

关键词： Black hole attack IoV vehicular ad hoc network AODV routing protocol

CoFe-LDH nanowire arrays on graphite felt: A high-performance oxygen evolution electrocatalyst in alkaline media

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Chinese Chemical Letters 2022年第2期33卷 890-892页

作者： Biao Deng Jie Liang Luchao Yue Tingshuai Li Qian Liu Yang Liu Shuyan Gao Abdulmohsen Ali Alshehri khalid ahmed Alzahrani Yonglan Luo Xuping Sun Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Institute for Advanced Study Chengdu UniversityChengdu 610106China School of Materials Science and Engineering Henan Normal UniversityXinxiang 453007China Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

Developing non-noble-metal oxygen evolution reaction(OER) electrocatalysts with high performance is critical to electrocatalytic water splitting. In this work, we fabricated Co Fe-layered double hydroxide(LDH) nanowire arrays on graphite felt(Co Fe-LDH/GF) via a hydrothermal method. The Co Fe-LDH/GF, as a robust integrated 3 D OER anode, exhibits excellent catalytic activity with the need of low overpotential of 252 and 285 mV to drive current densities of 10 and 100 mA/cm^(2) in 1.0 mol/L KOH, respectively. In addition, it also maintains electrochemical durability for at least 24 h. This work would open up avenues for the development of GF like attractive catalyst supports for oxygen evolution applications.

关键词： LDH Graphite felt Electrocatalyst Oxygen evolution Alkaline media

N-doped carbon nanotubes supported CoSe_(2) nanoparticles:A highly efficient and stable catalyst for H_(2)O_(2) electrosynthesis in acidic media

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Nano Research 2022年第1期15卷 304-309页

作者： Longcheng Zhang Jie Liang Luchao Yue Zhaoquan Xu Kai Dong Qian Liu Yonglan Luo Tingshuai Li Xiaohong Cheng Guanwei Cui Bo Tang Abdulmohsen Ali Alshehri khalid ahmed Alzahrani Xiaodong Guo Xuping Sun School of Chemical Engineering Sichuan UniversityChengdu 610065China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Chemistry Department Faculty of Science&Center of Excellence for Advanced Materials ResearchKing Abdulaziz UniversityP.O.Box 80203Jeddah21589Saudi Arabia

Electrocatalytic oxygen reduction reaction(ORR)provides an attractive alternative to anthraquinone process for H_(2)O_(2) *** design of earth-abundant electrocatalysts for H_(2)O_(2) synthesis via a two-electron ORR process in acids is attractive but still:very *** this work,we report that nitrogen-doped carbon nanotubes as a multi-functional support for CoSe2 nanoparticles not only keep CoSe_(2) nanoparticles well dispersed but alter the crystal structure,which in turn improves the overall catalYtic behaviors and thereby renders high O_(2)-to-H_(2)O_(2) conversion *** 0.1 M HClO_(4),such CoSe_(2)@NCNTs hybrid delivers a high H_(2)O_(2) selectivity of 93.2% and a large H_(2)0_(2) yield rate of 172 ppm·h^(-1) with excellent durability up to 24 ***,CoSe_(2)@NCNTs performs effectively for organic dye degradation via electro-Fenton process.

关键词： cobalt selenide nitrogen-doped carbon nanotube electrocatalysis two-electron oxygen reduction reaction hydrogen peroxide

土地利用对苏丹南科尔多凡州拉沙德地区蚂蚁功能多样性和其参与生态系统过程的影响

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土地利用对苏丹南科尔多凡州拉沙德地区蚂蚁功能多样性和其参与生...

作者： khalid ahmed Eisa Eisawi 西北农林科技大学

学位级别：硕士

大量研究表明人类活动,特别是农业生态系统的扩张,是物种灭绝的主要驱动因素。生物多样性的丧失通常会导致生态系统服务的下降。然而,这些响应会因为土地利用类型的变化和周围的生态环境而存在差异。本研究通过调查苏丹拉沙德区不同区... 详细信息

大量研究表明人类活动,特别是农业生态系统的扩张,是物种灭绝的主要驱动因素。生物多样性的丧失通常会导致生态系统服务的下降。然而,这些响应会因为土地利用类型的变化和周围的生态环境而存在差异。本研究通过调查苏丹拉沙德区不同区域蚂蚁种类组成及多样性水平,旨在明确土地利用类型和生态系统功能对蚂蚁群落的影响。通过比较自然生境(如村落Campo,古树群Kubos和森林)和不同土地利用类型(大豆单一种植区、牧场和有机蔬菜种植区)蚂蚁种类组成,明确原生植被的改变如何影响蚂蚁物种的丰富度和组成;通过模拟食物资源分布,评估蚂蚁分别从原生生态系统和农业生态系统的独特资源中迁移生物量的速率;通过调查蚂蚁对黑角黄贝粉蝶Belenois solilucis卵的捕食率,评估周边土地利用类型对蚂蚁捕食率的影响。主要研究结果如下:1.调查了拉沙德地区176个不同地点(涉及三种土地利用类型如传统的大豆单一种植区,牧场和有机农业区,以及自然生境如村落Campo,古树群Kubos和森林)的蚂蚁种类组成,分析了三种不同土地利用类型对蚂蚁群落的影响。从土壤表面共采集到264种蚂蚁,隶属于8亚科58属,但根据多样性指标估计该地区应存在342～354种蚂蚁。牧场和有机农业种植区分别有61%和56%的本地蚂蚁物种,而传统的大豆单一种植区本地蚂蚁种类仅占17%。森林是一个独特的群落,大豆单一种植区具有最强的生物均质化模式。在拉沙德地区,稀有物种(出现频率低)是蚂蚁丰富度的主要促进因素,因为它们密度低,在农业系统中的出现频率低,也是当地最容易灭绝的物种。2.在拉沙德区设置三个样带取样。每个采样地包括一个由12个陷阱组成的网格,这些陷阱中装满沙丁鱼诱饵(模拟动物有机体)、香蕉(模拟植物资源)、草籽(双色高粱,这些陷阱设置于自然生境(Campo、Kubos和森林)和农业生境(大豆单一栽培、牧场和有机农业)。结果表明,蚂蚁是最主要的生物量搬移者,在自然环境中蚂蚁对沙丁鱼的搬移率最高,平均为87.3±23.8g),其次为香蕉(平均70.5±31.5 g),种子最低(平均7.8±7.3 g)(p=0.017);而在大豆单一种植地区的沙丁鱼搬移率最低,对香蕉和种子的搬移率比较高,这一结果表明蚂蚁对区域生物量的影响与土地利用类型有关。因为在自然生境和农业生境中几乎没有生物量被消除,因此没有观察到种子诱饵的影响。3.在拉沙德地区的18个有机农业区,调查了蚂蚁和其他昆虫对Belenois solilucis卵的捕食率。研究表明,蚂蚁每天可取食26.8%的Belenois solilucis卵。其他捕食类群,主要包括鞘翅目的瓢虫科和隐翅虫科,只取食了13%的卵。招募能力最强的蚂蚁物种是Axinidris acholli、Tapinoma carininotum和Technomyrmex moerens。同时也经常观察到Linepithema,Dorymyrmex和Camponotus属的蚂蚁。

关键词：蚁科土地利用集约化生物控制干扰生物量生物多样性

Kinetics of Reduction of Thionine with Ribose and the Structural Properties of the Dye at Different pH Using DFT Method

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Chinese Journal of Chemistry 2011年第4期29卷 643-649页

作者： ahmed, khalid Azmat, Rafia Uddin, Fahim Fatmi, M. Qaiser Department of Chemistry University of Karachi Karachi 752 70 Pakistan Department of Chemistry Jinnah University for Women Nazimabad Karachi Pakistan Department of Chemistry University of California at Riverside California 92521 USA

The reaction between the thionine （Th） and the ribose was observed spectrophotometrically and changes in absorbance of Th were recorded at variable concentration of dye, reductant and pH. A pseudo first order rate of reaction was found to establish the reduction kinetics of the dye, studied at a pH range of 0.34 to 12.8. Absorption spectrum of Th at different pH, with ribose showed a pH （12.8） dependent introversion. The reduction most probably took place with enediol intermediate of the sugar at high pH. A full geometry optimization of predominant species of Th namely, mono-deprotonated, di-deprotonated Th, and LTh （leuco thionine） respectively, at low and high pH, was performed at B3LYP level of theory. The data obtained from the energy minimization were in excellent agreement with other experimental and theoretical observations. The calculated enthalpies of formation for both reduction reactions （mono-deprotonated Th＋H＋→leucothionine and di-deprotonated Th＋2H＋→leucothionine） provided evidences for maximum reduction of the dye at high pH.

关键词： thionine ribose pH enediol geometry optimization reduction

MXenes and heterostructures-based electrocatalysts for hydrogen evolution reaction:Recent developments and future outlook

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Journal of Energy Chemistry 2024年第5期92卷 176-206页

作者： Abdul Hanan Hafiz Taimoor ahmed Awan Faiza Bibi Raja Rafidah Raja Sulaiman Wai Yin Wong Rashmi Walvekar Seema Singh Mohammad khalid Sunway Centre for Electrochemical Energy and Sustainable Technology(SCEEST) School of Engineering and TechnologySunway UniversityNo.5 Jalan UniversitiBandar Sunway47500 Petaling JayaSelangorMalaysia Fuel Cell Institute Universiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Faculty of Innovation and Technology School of EngineeringChemical Engineering ProgrammeNo.1 Jalan Taylor’sTaylor’s University Malaysia47500 Subang JayaSelangorMalaysia Chitkara Centre for Research and Development Chitkara UniversityHimachal Pradesh 174103India School of Applied and Life Sciences Uttaranchal UniversityDehradunUttarakhand 248007India Manipal Institute of Technology Manipal Academy of Higher EducationManipal 576104KarnatakaIndia Centre of Research Impact and Outcome Chitkara UniversityPunjab 140401India

The increasing focus on electrocatalysis for sustainable hydrogen(H_(2))production has prompted significant interest in MXenes,a class of two-dimensional(2D)materials comprising metal carbides,carbonitrides,and *** materials exhibit intriguing chemical and physical properties,including excellent electrical conductivity and a large surface area,making them attractive candidates for the hydrogen evolution reaction(HER).This scientific review explores recent advancements in MXene-based electrocatalysts for HER *** discusses various compositions,functionalities,and explicit design principles while providing a comprehensive overview of synthesis methods,exceptional properties,and electro-catalytic approaches for H_(2) production via electrochemical ***,challenges and future prospects in designing MXenes-based electrocatalysts with enhanced kinetics are highlighted,emphasizing the potential of incorporating different metals to expand the scope of electrochemical *** review suggests possible efforts for developing advanced MXenes-based electrocatalysts,particularly for efficient H_(2) generation through electrochemical water-splitting reactions..

关键词： MXenes Electrocatalyst Water Splitting Hydrogen Generation Clean Energy