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Investigation of functional,physical,mechanical and thermal properties of TiO2 embedded polyester hybrid composites:A design of experiment(DoE)study

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Progress in Natural Science:Materials International 2018年第3期28卷 266-274页

作者： muhammad Azeem Munawar Dirk Wolfram Schubert shahzad Maqsood Khan muhammad Atiq Ur Rehman Nafisa Gulld Atif Islam Aneela Sabir muhammad Shafiq Bilal Haider Mudassar Azam Saba Urooge Khan Monika M.Voigt Institute of Polymer Materials Friedrich-Alexander-University Department of Polymer Engineering and Technology University of the Punjab Bavarian Polymer Institute Institute of Biomaterials Friedrich-Alexander-University Institute of Chemical Engineering and Technology University of the Punjab

This paper presents a study on the Design of Experiments(Do E) approach to optimize the fabrication parameters of titania(TiO2) embedded glass fiber reinforced polyester hybrid composites(HCs). HCs of unsaturated polyester resin(UPR) were fabricated using methyl ethyl ketone peroxide(MEKP) as the curing agent by hand lay-up process(HLUP) and compression molding technique(CMT). The fabrication parameters were optimized by Taguchi Do E(an orthogonal array of L25) using 3 control factors(concentration of TiO2, concentration of MEKP and curing temperature) having 5 levels each. Statistical tools were employed to identify significant factors affecting tensile strengths and its reproducibility during HLUP. It was found that the concentration of TiO2in HCs significantly influenced the tensile strength(TS) followed by MEKP concentration and curing temperature. The highest value of TS was obtained at 3 wt% TiO2, 2 wt% MEKP and 80 °C. Nevertheless, the sensitivity of TiO2concentration was basis for fabrication of polyester titania glass fiber hybrids(PTGFHs), which were further investigated for density and void fractions, linear shrinkage, flexural strength, impact strength, hardness and thermal behaviors. Moreover, cross-linking and hydrogen-bonding between polymeric chains, styrene, silica content of glass fiber and TiO2particles in PTGFHs were confirmed by Fourier transform infrared spectroscopy.

关键词： Hybrid composites Polyester Design of experiment Titania

Viscosity Approximation Methods for Nonexpansive Multimaps in Banach Spaces

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Acta Mathematica Sinica,English Series 2010年第6期26卷 1165-1176页

作者： Habtu ZEGEYE Naseer shahzad Bahir Dar University Department of Mathematics King Abdul Aziz University

We prove strong convergence of the viscosity approximation process for nonexpansive nonself multimaps. Furthermore, an explicit iteration process which converges strongly to a fixed point of multimap T is constructed.... 详细信息

关键词： nonexpansive retract Banach spaces fixed point inwardness nonexpansive multimap

Effects of drug-polymer dispersions on solubility and in vitro diffusion of artemisinin across a polydimethylsiloxane membrane

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Chinese Science Bulletin 2012年第14期57卷 1685-1692页

作者： shahzad Yasser SHAH Syed Nisar Hussain ANSARI muhammad Tayyab RIAZ Romana SAFDAR Aasma HUSSAIN Talib MALIK Madeeha Faculty of Pharmacy Bahauddin Zakariya University Division of Pharmacy and Pharmaceutical Sciences School of Applied SciencesUniversity of Huddersfield Hamdard Institute of Pharmaceutical Sciences Hamdard University

Artemisinin(ART) is a sesquiterpene lactone with an endo-peroxide bridge that is thought to be responsible for its antimalarial *** has low oral bioavailability because of aqueous insolubility,which leads to local toxicity at the site of *** present work focused on increasing its solubility and evaluating its permeation across a model membrane to mimic transdermal delivery that bypasses the hepatic *** this purpose,physical mixtures(PM),solid dispersions(SD) and lyophilized dispersions(LD) with different drug-polymer ratios(1:0.5,1:1,1:2,1:4 and 1:9) were prepared using the hydrophilic polymer polyvinylpyrrolidone(PVP).Drug-polymer dispersions were characterized using X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR).Solubility was measured in three solvents:de-ionized water,phosphate buffered saline(PBS) and *** toluene-water partition coefficient was evaluated and compared with the literature and calculated logP *** vitro diffusion of ART was studied across a polydimethylsiloxane membrane from a saturated solution of drug-polymer *** patterns showed a gradual decrease in crystallinity of ART with increasing polymer concentration,while FTIR confirmed no interactions between ART and *** was increased up to 4-,5-and 8-fold for LD in water,PBS and methanol,*** logP for toluene-water was 2.65 ± 0.3,which is in good agreement with literature and calculated logP *** was enhanced,which is attributed to the decrease in crystallinity and increase in wettability of the *** ART flux was significantly higher than that of pure ART(0.12 ± 0.01) with increasing PVP concentration for SD and LD *** conclusion,drug-polymer dispersions with PVP improve the pharmaceutical properties of ART in the order LD>SD>PM.

关键词：聚合物分散体溶解度测定聚硅氧烷外扩散青蒿素药物傅里叶变换红外光谱水性高分子

Enhancement in energy product in Sm-Co/Fe exchange coupled magnetic layers with molybdenum interlayers

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Journal of Rare Earths 2010年第2期28卷 274-276页

作者： Furrukh shahzad Saadat Anwar Siddiqi Centre for Solid State Physics University of the Punjab School of Physics and Microelectronics Shandong University

Trilayers of Sm-Co/Mo/Fe were deposited by DC and RF magnetron sputtering on Si(100) substrate at 650 °*** of very thin Mo interlayers on energy product of magnetic layers was *** the samples showed strong exchange coupling and single phase *** increasing Mo interlayer thickness,we observed oscillating behavior of saturation magnetization and energy *** rise in energy product was observed as 22% for 0.3 nm Mo interlayer as compared to sample without Mo interlayer.

关键词： exchange spring magnet nanocomposite (BH)max product rare earths

A discussion on cotton transformation during the last decade (2010–2021);an update on present trends and future prospects

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Journal of Cotton Research 2021年第4期4卷 372-385页

作者： QANDEEL‑E‑ARSH AZHAR muhammad Tehseen ATIF Rana muhammad ISRAR Mahwish KHAN Azeem Iqbal KHALID shahzad RANA Iqrar Ahmad Centre of Agricultural Biochemistry and Biotechnology(CABB) University of AgricultureFaisalabad 38000Pakistan Institute of Molecular Biology and Biotechnology Bahauddin Zakariya UniversityMultan 66000Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou 450000China Department of Plant Breeding and Genetics University of AgricultureFaisalabad 38000Pakistan Center of Advanced Studies in Agriculture and Food Security University of AgricultureFaisalabad 38000Pakistan Punjab Forestry Research Institute GutwalaFaisalabadPakistan Social Security Hospital FaisalabadPakistan

The introduction of genetically modified(GM)cotton in 1996 in the US and its worldwide spread later rejuvenated cotton production in many parts of the *** evolution is continued since then and currently,the 3rd and fourth generation of same GM cotton is grown in many parts of the *** GM cotton introduced in 1996 was simple Bt cotton that expressed a single Cry1Ac gene,the later generation carried multiple Cry genes along with the genes controlling herbicide *** day GM cotton does not only give stable resistance against lepidopteran insects but also facilitates the farmers to spray broad-spectrum herbicides without harming the *** evolution of GM cotton is continued both on the basic and applied side and interventions have been introduced during the last *** the cotton transformation was limited to Cocker strains which are getting possible in many other varieties,*** is successful with both gene gun,and Agrobacterium and inplanta transformation has made it a routine *** from overexpression studies for various purposes including biotic,abiotic,and quality traits,RNAi and genome editing are explored *** this review,we have tried to explore and discuss various interventions for improving transformation protocols,the applications of cotton transformation,and future strategies being developed to get maximum benefits from this technology during the last decade.

关键词： Cotton transformation Overexpression Genome editing Sustainable agriculture RNAi

Intrusion Detection in 5G Cellular Network Using Machine Learning

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Computer Systems Science & Engineering 2023年第11期47卷 2439-2453页

作者： Ishtiaque Mahmood Tahir Alyas Sagheer Abbas Tariq shahzad Qaiser Abbas Khmaies Ouahada Knowledge Unit of Systems and Technology UMT Sialkot CampusSialkot51040Pakistan Department of Computer Science Lahore Garrison UniversityLahore54000Pakistan Faculty of Computer Science National College of Business Administration and EconomicsLahore54660Pakistan Department of Electrical and Computer Engineering COMSATS University IslamabadSahiwal CampusSahiwal57000Pakistan Faculty of Computer and Information Systems Islamic University of Madinah Madinah42351Saudi Arabia Department of Computer Science&IT University of SargodhaSargodha40100Pakistan Department of Electrical and Electronic Engineering Science University of JohannesburgP.O Box 524Auckland ParkJohannesburg2006South Africa

Attacks on fully integrated servers,apps,and communication networks via the Internet of Things(IoT)are growing *** devices’effectiveness harms end users,increases cyber threats and identity theft,raises costs,and negatively impacts income as problems brought on by the Internet of Things network go unnoticed for extended *** on Internet of Things interfaces must be closely monitored in real time for effective safety and *** the 1,2,3,and 4G cellular networks,the 5th generation wireless 5G network is indeed the great invasion of mankind and is known as the global advancement of cellular *** to this day,experts are working on the evolution’s sixth generation(6G).It offers amazing capabilities for connecting everything,including gadgets and machines,with wavelengths ranging from 1 to 10 mm and frequencies ranging from 300 MHz to 3 *** gives you the most recent *** countries have already established this technology within their *** is the most crucial aspect of using a 5G *** of the absence of study and network deployment,new technology first introduces new gaps for attackers and *** Protocol(IP)attacks and intrusion will become more prevalent in this *** efficient approach to detect intrusion in the 5G network using a Machine Learning algorithm will be provided in this *** research will highlight the high accuracy rate by validating it for unidentified and suspicious circumstances in the 5G network,such as intruder hackers/*** applying different machine learning algorithms,obtained the best result on Linear Regression Algorithm’s implementation on the dataset results in 92.12%on test data and 92.13%on train data with 92%precision.

关键词： Intrusion detection system machine learning confidentiality integrity availability

Metal-organic framework derived multi-functionalized and co-doped TiO_(2)/C nanocomposites for excellent visible-light photocatalysis

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Journal of Materials Science & Technology 2022年第6期101卷 49-59页

作者： Mian Zahid Hussain Zhuxian Yang Ahmed M.E.Khalil shahzad Hussain Saif Ullah Awan Quanli Jia Roland A.Fischer Yanqiu Zhu Yongde Xia College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUnited Kingdom Department of Chemistry and Catalysis Research Centre Technical University of MunichGarching85748Germany Department of Chemical Engineering Faculty of EngineeringCairo UniversityGiza 12613Egypt Department of Physics COMSATS University Islamabad45550 Pakistan Department of Electrical Engineering National University of Sciences and TechnologyIslamabadPakistan Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou 450052China

Multi-functionalized and co-doped TiO_(2)/C nanocomposites were derived from the pyrolysis of Ti-MOFs at 800℃under different gaseous atmospheres and their photocatalytic performance were *** gaseous atmosphere during pyrolysis plays a critical role in determining the structural,textural,optical and physicochemical properties of the derived TiO_(2)/C composites due to the synergistic effect of nitrogen-containing species,carboxylate and sulfur functionalized porous carbon as well as N/S co-doped TiO_(2)*** the Ti-MOFs derived TiO_(2)/C composites exclusively possess homogeneously distributed TiO_(2)nanoparticles in a functionalized disc-like porous carbon matrix and demonstrate much enhanced adsorption and photodegradation performance than commercial TiO_(2)under the same *** adsorption of methylene blue(MB)in dark on these TiO_(2)/C composites are dominated with pseudo second-order kinetic model and the high adsorption capacity of MB in dark on composite TiO_(2)/C derived from MIL-125(Ti)in argon is due to its high surface area with predominant mesoporous carbon matrix in the *** composite N-O-TiO_(2)/C derived from NH2-MIL-125(Ti)in water vapor exhibited the highest photodegradation activity with 99.7%MB removal in 3 h under visible light due to the optimal anatase/rutile phasejunction,together with the formation of photoactive oxygen-rich N-O like interstitial/intraband states above the valence band of TiO_(2),as well as the presence of N-containing species and-OH/-COOH multi-functional groups with superhydrophilic nature of the *** simple one-step and easily modifiable approach can be further employed to modulate homogeneously dispersed multi-functionalized and co-doped metal oxide/carbon nanocomposites for various environment and energy-related applications.

关键词： Nanocomposite MOF derivative TiO_(2) Porous carbon Photocatalysis

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地震波成像揭示云南省的热液活动和成矿环境

Transactions of Nonferrous Metals Society of China 2023年第11期33卷 3476-3486页

作者：孙娅邓士林柳健新 Syed Muzyan shahzad 陈波中南大学地球科学与信息物理学院长沙410083 中南大学有色资源与地质灾害探查湖南省重点实验室长沙410083

采用双差定位层析成像方法揭示S波速度结构,显示大规模低速异常主要集中在10~25km深度的小江断裂带和丽江-小金河断裂带周围;而在川滇块体中南部区域存在一个明显的高速异常,这与峨眉山大型火成岩省分布区域范围一致。根据地质和地球物... 详细信息

采用双差定位层析成像方法揭示S波速度结构,显示大规模低速异常主要集中在10~25km深度的小江断裂带和丽江-小金河断裂带周围;而在川滇块体中南部区域存在一个明显的高速异常,这与峨眉山大型火成岩省分布区域范围一致。根据地质和地球物理资料,推断小江断裂带和丽江-小金河断裂带下的低速异常与来自青藏高原中部的下地壳流动有关。然而,峨眉山地区中部存在明显的高速异常,与峨眉山大型火成岩区一致。峨眉山下方的与地幔柱相关高速异常会阻碍地壳流动,从而使得地壳流被限制在深大断裂带附近。结果还发现多种矿产资源主要集中在大型断层和低速带上,表明下地壳流动和大型深部断层为流体成矿和矿床沉积提供了条件。

关键词：云南省地震波层析成像下地壳流成矿环境

First report on molecular characterization of Leishmania species from cutaneous leishmaniasis patients in southern Khyber Pakhtunkhwa province of Pakistan

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Asian Pacific Journal of Tropical Medicine 2017年第7期10卷 785-788页

作者： Mubbashir Hussain shahzad Munir Sultan Ayaz Bahar Ullah Khattak Taj Ali Khan Niaz muhammad muhammad Anees Hazir Rahman muhammad Qasim muhammad Ameen Jamal Irfan Ahmed Kashif Rahim Humaira Mazhar Noha Watanay Mohamed Kasbari Vector Borne Diseases Laboratory Department of MicrobiologyKohat University of Science and Technology Kohat Department of Plant Pathology Faculty of Plant ProtectionYunnan Agricultural University College of Animal Husbandry and Veterinary Sciences Abdul Wali Khan University Mardan College of Animal Science and Technology Yunnan Agricultural University Yunnan Provincial Key Laboratory of Animal Nutrition and Feed Yunnan Agricultural University Beijing Key Laboratory of Genetic Engineering Drug and Biotechnology Institute of Biochemistry and BiotechnologyCollege of Life SciencesBeijing Normal University US Naval Medical Research Unit-3 (NAMRU 3) ANSES Animal Health Laboratory

Objective: To report presence of Leishmania major in Khyber Pakhtunkhwa of Pakistan, where cutaneous leishmaniasis(CL) is endemic and was thought to be caused by Leishmania tropica only. Methods: Biopsy samples from 432 CL suspected patients were collected from 3 southern districts of Khyber Pakhtunkhwa during years 2011–2016. Microscopy on Giemsa stained slides were done followed by amplification of the ribosomal internal transcribed spacer 1 gene. Results: Leishmania amastigotes were detected by microscopy in 308 of 432 samples(71.3%) while 374 out of 432 samples(86.6%) were positive by ribosomal internal transcribed spacer 1 PCR. Subsequent restriction fragment length polymorphism confirmed Leishmania tropica in 351 and Leishmania major in 6 biopsy samples. Conclusions: This study is the first molecular characterization of Leishmania species in southern Khyber Pakhtunkhwa. It confirmed the previous assumptions that anthroponotic CL is the major CL form present in Khyber Pakhtunkhwa province. Furthermore, this is the first report of Leishmania major from a classical anthroponotic CL endemic focus identified in rural areas of Kohat district in southern Khyber Pakhtunkhwa.

关键词： Cutaneous leishmaniasis ITS-PCR RFLP Leishmania tropica Khyber Pakhtunkhwa