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51篇 您的检索式:作者名="Sidra"
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1Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water显示文摘This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),respectively.These materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous medium.Characterization of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic composition.Some other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD patterns.Furthermore,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM microphotographs.Optimization of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent dosage.The pseudo-second-order model was in good fitting with kinetics results.The adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both nanocomposites.Thermodynamic studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been treated.The obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava Mika Sillanpaa Bechir Hamrouni 2020Journal of Environmental Sciences2020,32,5:10
2Farmers' Perception and Awareness and Factors Affecting Awareness of Farmers Regarding Crop Insurance as a Risk Coping Mechanism Evidence from Pakistan显示文摘This study has been conducted in three districts of Punjab Province namely, Dera Ghazi Khan, Rajan Pur and Bahawalpur of Pakistan. The study showed the results of a survey of 300 farmers which was organized to assess awareness level of farmers regarding crop insurance, factors affecting the awareness level among farmers and the perception of farmers about crop insurance. Based on exploratory research work upon the responses of farmers, the average and standard deviation were calculated. Probit model was applied to explore the factors affecting the awareness level of farmers. SPSS was used for the analysis of the collected data. The results revealed that out of 300 farmers, 184 farmers were aware with crop insurance and rests of the 116 farmers were not aware. Banks and E-media were found to be the two most important sources of the awareness for the respondent farmers. In the study area, the climatic risks were reported as the most severe risks faced by the farmers. The results also revealed the existence of negative perceptions of the farmers about crop insurance i.e. farmers perceived crop insurance as a kind of tax and they believed premium was so high that it was out of range of poor farmers and only large scale farmers could afford it. Results obtained by applying Probit model revealed that 'education' and 'previously availed agricultural credit' were the two most important factors which affected the awareness of the farmers regarding crop insurance.Sidra Ghazanfar Zhang Qi-wen Muhammad Abdullah Zeeshan Ahmad Majid Lateef 2015Journal of Northeast Agricultural University(English Edition)2015,22,1:9
3Analysis on Technical Efficiency of Rice Farms and Its Influencing Factors in South-western of Niger显示文摘The present study focused on analyzing the technical efficiency of rice farms in southwest of Niger. The data from January to March 2015 survey of 148 ms in three districts of south-western of Niger were analyzed by using DEA-Tobit two-step method. In the first step, data envelopment analysis(DEA) was applied to estimate technical, pure technical and scale efficiency. In the second step, Tobit regression was used to identify factors affecting technical efficiency. The results showed that rice producers in southwest of Niger could reduce their inputs by 52% and still produce the same level of rice output. The Tobit regression showed that factors, such as farm size, experience in rice farming, membership of cooperative, main occupation and land ownership had a direct impact on technical efficiency.Oumarou Boubacar Zhou Hui-qiu Muhammad Abdullah Rana Sidra Ghazanfar 2016Journal of Northeast Agricultural University(English Edition)2016,23,4:5
4Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution显示文摘A series of novel adsorbents composed of cellulose(CL)with Ca/Al layered double hydroxide(CC_(x)A;where x represent the Ca/Al molar ratio)were prepared for the adsorption of antimony(Sb(V))and fluoride(F^(-))ions from aqueous solutions.The CC_(x)A was characterized by Fourier-transform infrared spectroscopy(FTIR),Brunauer–Emmett–Teller(BET),elemental analysis(CHNS/O),thermogravimetric analysis(TGA-DTA),zeta potential,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive Xray spectroscopy(SEM-EDX)analysis.The effects of varying parameters such as dose,pH,contact time,temperature and initial concentration on the adsorption process were investigated.According to the obtained results,the adsorption processes were described by a pseudo-second-order kinetic model.Langmuir adsorption isotherm model provided the best fit for the experimental data and was used to describe isotherm constants.The maximum adsorption capacity was found to be 77.2 and 63.1 mg/g for Sb(V)and F^(-),respectively by CC_(3)A(experimental conditions:pH 5.5,time 60 min,dose 15 mg/10 mL,temperature 298 K).The CC_(3)A nanocomposite was able to reduce the Sb(V)and F^(-)ions concentration in synthetic solution to lower than 6μg/L and 1.5 mg/L,respectively,which are maximum contaminant levels of these elements in drinking water according to WHO guidelines.Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji Chaker Necibi Mika Sillanpää Bechir Hamrouni 2021Journal of Environmental Sciences2021,33,4:4
5Elemental composition of rice using calibration free laser induced breakdown spectroscopy显示文摘In this paper, we apply laser induce breakdown spectroscopy (LIBS) to determine the elemental composition of different parts(root, stem and seed) of the rice plant and determine their weighted concentration using calibration free laser induced breakdown spectroscopy (CF-LIBS) technique. Ca, Fe and K are identified as major elements, while C, Ti, Mg, Si, Li, Ba, Sr, Cr, Na and Al as minor elements. We also detect the H-alpha line of hydrogen in the spectrum and determine the electron number density. The electron number density and its behavior as a function of laser energy, laser wavelength and the detector position are investigated. The plasma temperatures of samples are determined, and the validity of the assumption of the local thermodynamic equilibrium (LTE) is discussed.Abdul Jabbar Mahmood Akhtar Arslan Ali Shaukat Mehmood Sidra Iftikhar Muhmmad Aslam Baig 2019Optoelectronics Letters2019,15,1:4
6神经精神疾病中的催产素系统:老概念,新见解(英文)显示文摘催产素(oxytocin,OXT)是一种神经肽,在各物种的中枢和外周神经系统中都起着关键作用。由于它参与焦虑相关行为、压力调节、社会行为和各种神经精神障碍,近年引起大量关注。OXT是介导诸如母性行为、恐惧消退、社会支持、幸福与信任之类的情感和社会行为的重要物质之一,也参与学习和记忆过程。OXT系统的最新进展已将此神经肽用于心理治疗干预各种神经精神疾病,如压力、焦虑障碍、社交恐惧症、产后忧郁症、躁郁症、自闭症和精神分裂症等。本综述着重概括OXT对各种生理功能和心理问题的贡献,并讨论其作为治疗药物的潜力。MISRANI Afzal TABASSUM Sidra 龙程 2017生理学报2017,69,2:3
7Infectious diseases in the aftermath of monsoon flooding in Pakistan显示文摘Pakistan is ranked 9th in terms of flood-affected countries worldwide.In the summer of 2010,the northern province of Khyber-Pakhtunkhwa received more than 312 mm of rain in a 56 hour period.This resulted in over 1 600 deaths across the region.In addition,over 14 million people were directly affected by this record-breaking deluge.Flood affected regions serve as ideal breeding grounds for pathogens,leading to the spread of diseases.The poor standards of hygiene in camps set up for individuals displaced by the floods also contribute to this.It is essential that those involved in relief efforts are aware of the epidemiology of diseases that have historically seen a sudden upsurge after natural disasters.Keeping this in mind,we conducted a simple review of literature.An extensive literature search was conducted using the PubMed data base and online search engines.Articles published in the last 20 years were considered along with some historical articles where a background was required.Seven major diseases were identified to increase substantially in the aftermath of natural disasters.They were then classified into acute and sub-acute settings.Diarrhea,skin&eye infections and leptospirosis were identified in the acute setting while malaria,leishmaniasis,respiratory infections and hepatitis were identified in the sub-acute setting.Maryam Baqir Zain A Sobani Amyn Bhamani Nida Shahab Bham Sidra Abid Javeria Farook M Asim Beg 2012Asian Pacific Journal of Tropical Biomedicine2012,2,1:2
8Synthesis and application of biocompatible nontoxic nanoparticles for reclamation of Ce^3+ from synthetic wastewater: Toxicity assessment, kinetic, isotherm and thermodynamic study显示文摘The aim of present study is to synthesize forsterite nanoparticles(FRST) for the reclamation of cerium ions(Ce^(3+)) from synthetic wastewater.The aim to synthesize FRST nanoparticles is due to its biocompatible and nontoxic nature.The formation of nanoparticles with average diameter of 58 nm was confirmed by TEM analysis.SEM images of bare FRST nanoparticles show a heterogeneous surface with porous nature.BET surface area of FRST nanoparticles is calculated to be 33.69 m^2/g.The significant uptake of Ce^(3+) ions can be obtained for all the selected concentrations(25-150 mg/L) within 2 h of adsorbent—adsorbate interaction.The pH study shows that by increasing pH from acidic to alkaline range,higher removal can be achieved.Temperature study demonstrates the endothermic nature of Ce^(3+)adsorption.The value of sticking probability suggests very high sticking probability of Ce^(3+) ion for FRST nanoparticles.Ce^(3+) uptake is favored by higher temperature and with the increase in temperature from298 to 328 K,Langmuir adsorption capacity increases from 36.45 to 42.99 m^2/g.Applicability of FRST nanoparticles was also investigated for other light and heavy rare earth elements in single solute and multisolute systems,FRST nanoparticles show the significant removal of divalent metallic pollutants as well.The assessment of chemical toxicity of treated wastewater was carried out with the bioluminescent photobacterium(Vibrio fischeri) and decreased toxicity was observed in treated water samples.The outcome of present study suggests that the FRST nanoparticles can be efficiently utilized for the removal of Ce^(3+) ions and a wide range of other pollutant species as well.Varsha Srivastava Sidra Iftekhar ZhaoWang Indu Babu Mika Sillanpaa 2018Journal of Rare Earths2018,36,9:2
9COVID-19 and gut immunomodulation显示文摘The disease coronavirus disease 2019(COVID-19)is a severe respiratory illness that has emerged as a devastating health problem worldwide.The disease outcome is heterogeneous,and severity is likely dependent on the immunity of infected individuals and comorbidities.Although symptoms of the disease are primarily associated with respiratory problems,additional infection or failure of other vital organs are being reported.Emerging reports suggest a quite common co-existence of gastrointestinal(GI)tract symptoms in addition to respiratory symptoms in many COVID-19 patients,and some patients show just the GI symptoms.The possible cause of the GI symptoms could be due to direct infection of the epithelial cells of the gut,which is supported by the fact that(1)The intestinal epithelium expresses a high level of angiotensin-converting enzyme-2 and transmembrane protease serine 2 protein that are required for the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)entry into the cells;(2)About half of the severe COVID-19 patients show viral RNA in their feces and various parts of the GI tract;and(3)SARS-CoV-2 can directly infect gut epithelial cells in vitro(gut epithelial cells and organoids)and in vivo(rhesus monkey).The GI tract seems to be a site of active innate and adaptive immune responses to SARS-CoV-2 as clinically,stool samples of COVID-19 patients possess proinflammatory cytokines(interleukin 8),calprotectin(neutrophils activity),and immunoglobulin A antibodies.In addition to direct immune activation by the virus,impairment of GI epithelium integrity can evoke immune response under the influence of systemic cytokines,hypoxia,and changes in gut microbiota(dysbiosis)due to infection of the respiratory system,which is confirmed by the observation that not all of the GI symptomatic patients are viral RNA positive.This review comprehensively summarizes the possible GI immunomodulation by SARS-CoV-2 that could lead to GI symptoms,their association with disease severity,and potential therapeutic interventions.Koushik Roy Sidra Agarwal Rajib Banerjee Manash K Paul Prabhat K Purbey 2021World Journal of Gastroenterology2021,27,46:2
10Reverse vaccinology assisted designing of multiepitope-based subunit vaccine against SARS-CoV-2显示文摘Background:Coronavirus disease 2019(COVID-19)linked with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)cause severe illness and life-threatening pneumonia in humans.The current COVID-19 pandemic demands an effective vaccine to acquire protection against the infection.Therefore,the present study was aimed to design a multiepitope-based subunit vaccine(MESV)against COVID-19.Methods:Structural proteins(Surface glycoprotein,Envelope protein,and Membrane glycoprotein)of SARS-CoV-2 are responsible for its prime functions.Sequences of proteins were downloaded from GenBank and several immunoinformatics coupled with computational approaches were employed to forecast B-and T-cell epitopes from the SARS-CoV-2 highly antigenic structural proteins to design an effective MESV.Results:Predicted epitopes suggested high antigenicity,conserveness,substantial interactions with the human leukocyte antigen(HLA)binding alleles,and collective global population coverage of 88.40%.Taken together,276 amino acids long MESV was designed by connecting 3 cytotoxic T lymphocytes(CTL),6 helper T lymphocyte(HTL)and 4 B-cell epitopes with suitable adjuvant and linkers.The MESV construct was non-allergenic,stable,and highly antigenic.Molecular docking showed a stable and high binding affinity of MESV with human pathogenic toll-like receptors-3(TLR3).Furthermore,in silico immune simulation revealed significant immunogenic response of MESV.Finally,MEV codons were optimized for its in silico cloning into the Escherichia coli K-12 system,to ensure its increased expression.Conclusion:The MESV developed in this study is capable of generating immune response against COVID-19.Therefore,if designed MESV further investigated experimentally,it would be an effective vaccine candidate against SARS-CoV-2 to control and prevent COVID-19.Muhammad Tahir ul Qamar Farah Shahid Sadia Aslam Usman Ali Ashfaq Sidra Aslam Israr Fatima Muhammad Mazhar Fareed Ali Zohaib Ling-Ling Chen 2020Infectious Diseases of Poverty2020,9,5:2
11Effects of Catalysis and Separator Functionalization on High-Energy Lithium–Sulfur Batteries:A Complete Review显示文摘Lithium–sulfur(Li-S)batteries have the advantages of high theoretical specific capacity(1675 mAh g^(−1)),rich sulfur resources,low production cost,and friendly environment,which makes it one of the most promising next-generation rechargeable energy storage devices.However,the“shuttle effect”of polysulfide results in the passivation of metal lithium anode,the decrease of battery capacity and coulombic efficiency,and the deterioration of cycle stability.To realize the commercialization of Li-S batteries,its serious“shuttle effect”needs to be suppress.The commercial separators are ineffective to suppress this effect because of its large pore size.Therefore,it is an effective strategy to modify the separator surface and introduce functional modified layer.In addition to the blocking strategy,the catalysis of polysulfide conversion reaction is also an important factor hindering the migration of polysulfides.In this review,the principles of separator modification,functionalization,and catalysis in Li-S batteries are reviewed.Furthermore,the research trend of separator functionalization and polysulfide catalysis in the future is prospected.Muhammad Kashif Aslam Sidra Jamil Shahid Hussain Maowen Xu 2023Energy & Environmental Materials2023,6,3:2
12Syn- thesis, characterization, permeation and antibacterial properties of cellulose acetate/poly ethylene glycol membranes modified with ch- itosan显示文摘Sidra Waheed Adnan Ahmad Shahzad Maqsood Khan 2014Desalination2014,351,:1
13An over view of HCV molecular biology,replication and immune responses显示文摘Usman A Ashfaq Tariq Javed Sidra Rehman 2011Vi- rology Journal2011,8,:1
14Accentuating the prodigious signif- icance of Eclipta alba an inestimable medicinal plant显示文摘Sidra S Hussain S Malik F 2013Pak J Pharm Sei2013,26,6:1
15Combination chemotherapy with cyclophosphamide,thalidomide and dexamethasone for patients with refractory, newly diagnosed or relapsed myeloma 显示文摘Sidra G Williams CD Russet NH 2006Haematologica2006,91,6:1
16Integrated CWT-CNN for Epilepsy Detection Using Multiclass EEG Dataset显示文摘Electroencephalography is a common clinical procedure to record brain signals generated by human activity.EEGs are useful in Brain controlled interfaces and other intelligent Neuroscience applications,but manual analysis of these brainwaves is complicated and time-consuming even for the experts of neuroscience.Various EEG analysis and classification techniques have been proposed to address this problem however,the conventional classification methods require identification and learning of specific EEG characteristics beforehand.Deep learning models can learn features from data without having in depth knowledge of data and prior feature identification.One of the great implementations of deep learning is Convolutional Neural Network(CNN)which has outperformed traditional neural networks in pattern recognition and image classification.Continuous Wavelet Transform(CWT)is an efficient signal analysis technique that presents the magnitude of EEG signals as timerelated Frequency components.Existing deep learning architectures suffer from poor performance when classifying EEG signals in the Time-frequency domain.To improve classification accuracy,we propose an integrated CWT and CNN technique which classifies five types of EEG signals using.We compared the results of proposed integrated CWT and CNN method with existing deep learning models e.g.,GoogleNet,VGG16,AlexNet.Furthermore,the accuracy and loss of the proposed integrated CWT and CNN method have been cross validated using Kfold cross validation.The average accuracy and loss of Kfold cross-validation for proposed integrated CWT and CNN method are,76.12%and 56.02%respectively.This model produces results on a publicly available dataset:Epilepsy dataset by UCI(Machine Learning Repository).Sidra Naseem Kashif Javed Muhammad Jawad Khan Saddaf Rubab Muhammad Attique Khan Yunyoung Nam 2021Computers, Materials & Continua2021,,10:1
17Encapsulation of 2-amino-2-methyl-l-propanol with tetraethyl orthosilicate for C02 capture显示文摘Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection.Although various C02 capture technologies including absorption,adsorption and membrane exist,they are not yet mature for post-combustion power plants mainly due to high energy penalty.Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids,C 02-binding organic liquids,nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture.This research aims to develop a novel and efficient approach by encapsulating sorbents to capture C02 in a cold environment.The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-l-propanol(AMP)as the core sorbent and silicon dioxide as the shell.This paper reports the findings on the formulated microcapsules including key formulation parameters,microstructure,size distribution and thermal cycling stability.Furthermore,the effects of microcapsule quality and absorption temperature on the C02 loading capacity of the microcapsules were investigated using a self-developed pressure decay method.The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.Sidra Rama Yan Zhang Fideline Tchuenbou-Magaia Yulong Ding Yongliang Li 2019Frontiers of Chemical Science and Engineering2019,13,4:1
18Study of the formation of caseinomaeropeptides in stored ultra- high- temperature- treated milk by capillary electrophoresis 显示文摘sidra Recio Rosina López-Fandi? o Agustin Olano Cornelius Olieman Mereedes Ramos 1996Agricultural and Food Chemistry1996,12,44:1
19不同双层结构AlCrN/AlCrVN多层涂层的力学和磨损性能显示文摘采用电弧离子镀的方法制备了不同数目(1、2、4、6)双层结构的AlCrN/AlCrVN多层涂层,并研究了多层结构对涂层微观结构、力学、摩擦学和切削性能的影响。结果显示,沉积态AlCrN/AlCrVN多层涂层主要由固溶(Al,Cr)N组成,优先生长方向为[111]晶向。与其他多层涂层相比,具有6层双层结构的AlCrN/AlCrVN涂层在高温下表现出较低的摩擦系数(约0.46)和磨损率(0.15×10^(−11) m^(3)/N·m),以及较高的硬度(HK_(0.05)=38000 MPa)和膜-基结合强度(L_(C2)=53±1 N)。多层涂层相邻层之间形成了较多的界面,有助于提高多层涂层的硬度和耐磨性。切削试验结果显示,当切削磨损标准VB=0.2时,AlCrN/AlCrVN-6涂层具有较高的硬度和耐磨性,最长的切削长度为7.4 m。Iram Sidra 蔡飞 王建明 房磊琦 张家敏 Ahmad Farooq 张世宏 2022稀有金属材料与工程2022,51,1:1
20Effects of national culture on bank risk-taking behavior 显示文摘Ashraf Badar Nadeem Zheng Changjun Arshad Sidra 2016Research in Interna-tional Business and Finance2016,37,5:1
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