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Assessment of radioactivity levels in some cement produced locally in Iraq

Radiation Detection Technology and Methods 2021年第4期5卷 633-640页

作者： Maitham S.Amana najwa j.jubier Mohammed j.R.Aldhuhaibat A.A.Salim Department of Physics College of ScienceUniversity of WasitKutWasitIraq Laser Center&Physics Department Faculty of ScienceUniversiti Teknologi MalaysiaJohor bahruJohorMalaysia

Purpose Due to the rapid expansion of the construction industries,cement production is ever-increasing worldwide and maintaining the qualities of the local cement became vital for safe and durable *** this regard,the radiometric assessment of cement plays a significant *** The specific activities of the naturally occurring radionuclides present in ten Portland cement samples that can cause possible health hazards were determined using a gamma-ray spectrometer equipped with(3×3)inch NaI(Tl)detector with 1024 *** and conclusion The measured activity concentrations of Ra-226,Th-232,and K-40 were found in the range of 12.38–55.75(average of 31.29 Bq/kg),6.29–57.54(average of 15.97 Bq/kg),and 112.63–266.37(average of 168.24 Bq/kg),*** recorded average activity concentration of these radionuclides in the cement was below the stipulated world standard by UNSCEAR(Sources and Effects of Ionizing Radiation,United Nations Scientific Committee on the Effects of Atomic Radiation UNSCEAR 2000 Report to the General Assembly,with Scientific Annexes,vol.I,2000).The obtained mean activity concentration of Raeq in the cement(67.101 Bq/kg)was much lower than the recommended guideline of 370 Bq/*** addition,the mean value of the calculated absorbed dose rate(59.947 nGy·h^(−1)),annual effective dose(0.220 mSv·y^(−1)),activity concentration index(0.240),alpha index(0.156),excess lifetime cancer risk(0.771×10^(−3))external(0.084)and internal(0.300)hazard index of the studied samples were much below the recommended safety *** is affirmed that the cement sold in the local market can safely be used for building constructions.

关键词： Cement Concentration Absorbed dose Alpha index Health hazards

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Measurement Changes in Activation Energy, Hall Effect and Seebeck Effect of Lead Telluride Thin Films Prepared by Thermal Evaporation Technique with Different Annealing Temperatures

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材料科学与工程（中英文B版） 2011年第6期1卷 811-818页

作者： najwa jassim jubier Suaad Ghafoori Khalil Abbas Fadhil Essa Department of Physics College of Science University of Wasit Kut Iraq Department of Physics College of Science for Women University of Baghdad

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A mixed acid methodology to produce thermally stable cellulose nanocrystal at high yield using phosphoric acid

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journal of Bioresources and Bioproducts 2022年第2期7卷 17-26页

作者： Khairatun najwa Mohd Amin Alireza Hosseinmardi Darren j.Martin Pratheep K.Annamalai Australian Institute for Bioengineering and Nanotechnology(AIBN) the University of QueenslandBrisbaneQLD 4072 Australia Faculty of Chemical and Process Engineering Technology College of Engineering TechnologyUniversiti Malaysia PahangLebuhraya Tun Razak26300 Gambang KuantanPahang D.M.Malaysia

Cellulose nanocrystal(CNC)with distinctive shape-morphology,enhanced thermal stability and dispersibility is essential for overcoming the challenges in processing polymer/CNC nanocom-posites through melt compounding at elevated *** study shows a mixed acid hy-drolysis method to produce CNC with improved thermal stability and high *** use of phosphoric acid(H_(3)PO_(4)),as a mild acid,in combination with a strong acid either sulphuric acid(H_(2)SO_(4))or hydrochloric acid(HCl)leads to reduced use of strong acids and low impact on our *** influences of acid combination and sequence of addition on the production yield were investigated by retaining the proportion of H_(3)PO_(4)to corrosive acid(H_(2)SO_(4)and HCl)4 to 1,and solid to liquid ratio 1꞉*** methodology has enabled to isolate CNC with higher thermal stability,dispersibility and productivity in terms of amount acid used 1 g of CNC,as compared with single acid *** CNC produced using the combination of H_(3)PO_(4)and HCl exhibits high thermal stability,dispersibility and rod-like shape morphology with length and width of(424±86)and(22±3)nm,***,this approach has reduced H_(3)PO_(4)consumption by 54%as compared with single acid hydrolysis method for the production of same amount of CNC.

关键词： Cellulose nanocrystal(CNC) Acid hydrolysis Thermal stability Mixed acid Crystallinity Production yield

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Incipient sediment motion based on turbulent fluctuations

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International journal of Sediment Research 2020年第2期35卷 125-133页

作者： Wan Hanna Melini Wan Mohtar ji Wang Lee najwa Izzaty Mohammad Azha Nian-Sheng Cheng Department of Civil & Structural Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia School of Civil and Environmental Engineering College of EngineeringNanyang Technical University

The current study modifies the representation of the Shields parameter using turbulent strength,*** root-mean-square(rms) fluid *** were done under a steady,uniform flow using eight sediment sizes with particle Reynolds numbers(Rep) ranging between 1.0(fine sediment) and 183.4(coarse sediment).Utilising the peak rms horizontal(u) values,the critical Shields parameter,θ,was calculated and a trend similar to the well-established Shields curve was *** analysis was extended to the Shields curve obtained based on the critical shear velocity,Reynolds shear stress,and data extracted fro m the oscillating grid-turbulence *** show that turbulent fluctuations are crucial for the incipient sediment motion and are essentially better predictors than the commonly used critical shear velocity.A quadrant analysis to identify the role of turbulent bursting events in incipient sediment motion also was done where sweeps and ejections are dominant for finer and coarser sediment sizes,respectively.

关键词： Incipient sediment motion Root-mean-square fluid velocity Grid-turbulence Quadrant analysis Turbulent fluctuations

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Growth-controlled synthesis of polymer-coated colloidal-gold nanoparticles using electrospray-based chemical reduction

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Particuology 2021年第4期19卷 72-81页

作者： Mohamed Hasaan Hussain Noor Fitrah Abu Bakar Kim-Fatt Low Ana najwa Mustapa Fatmawati Adam Mohd Nazli Naim I.Wuled Lenggoroe Faculty of Chemical Engineering Universiti Teknologi MARAShah AlamSelangor 40450Malaysia Faculty of Applied Sciences Universiti Teknologi MARAPerak BranchTapah CampusTapah RoadPerak 35400Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia PahangLebuh Raya Tun RazakGambangPahang 26300Malaysia Department of Process and Food Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor 43400Malaysia Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and TechnologyNaka Cho2-24-16KoganeiTokyo 184-8588Japan Department Chemical of Engineering Tokyo University of Agriculture and TechnologyNaka Cho2-24-16KoganeiTokyo 184-8588Japan

In this study,the controlled nucleation and growth of gold nanoparticles(GNPs)were investigated using a self-repelled mist in a liquid chemical reaction *** electrospray-based chemical reduction method was conducted in the aqueous region and at room temperature to synthesize the polymeric-stabilized gold *** electrospray technique was used to atomize a hydrogen tetrachloraurate(III)(HAuCl4)precursor solution into electrostatically charged *** atomized droplets were dispersed in an aqueous reaction bath containing L-ascorbic acid as a reducing agent and polyvinylpyrrolidone(PVP)as a *** effect of the electrospray parameters,specifically the flow rate and electrospray droplet size,as well as the reaction conditions such as the concentration of reactants,pH,and stabilizer(PVP),were *** mean diameter of the GNPs increased from around 4 to 9 nm with an increase in the electrospray flow rate,droplet size,and current passing through the electrospray *** and monodispersed GNPs were synthesized at a relatively high flow rate of 2 mL/h and a moderate concentration of 2 mM of precursor *** smallest-sized GNP with a high monodispersity was obtained in the reaction bath at a high pH of 10.5 and in the presence of *** is expected that continuous and mass production of the engineered GNPs and other noble metal nanoparticles could be established for scaling up nanoparticle production via the proposed electrospray-based chemical reduction method.

关键词： Electrospray Gold nanoparticles Chemical reduction method L-ascorbic acid PVP Aqueous medium

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The nuclear cytokine IL-37a controls lethal cytokine storms primarily via IL-1R8-independent transcriptional upregulation of PPARγ

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Cellular & Molecular Immunology 2023年第12期20卷 1428-1444页

作者： Rongfei Wei Xiao Han Mengyuan Li Yuan ji Lianfeng Zhang Maria-Ioanna Christodoulou najwa jameel Hameed Aga Caiyan Zhang Ran Gao jiangning Liu jinrong Fu Guoping Lu Xiaojun Xiao Xiaoyu Liu Ping-Chang Yang Iain B.McInnes Ying Sun Peisong Gao Chuan Qin Shau-Ku Huang Yufeng Zhou Damo Xu Institute of Laboratory Animal Science Chinese Academy of Medical Science(CAMS)and Comparative Medicine CenterPeking Union Medical College(PUMC)BeijingChina National Laboratory of Biomacromolecules CAS Center for Excellence in Biom––acromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing100101China NHC Key Laboratory of Neonatal Diseases Children’s Hospital of Fudan Universityand the Shanghai Key Laboratory of Medical EpigeneticsInternational Co-laboratory of Medical Epigenetics and MetabolismMinistry of Science and TechnologyInstitutes of Biomedical SciencesFudan UniversityShanghai200032China Department of General Practice Medicine Third Affiliated Hospital of Shenzhen UniversityShenzhenChina Institute of Infection Immunity and InflammationUniversity of GlasgowGlasgowUK Tumor Immunology and Biomarkers Laboratory Basic and Translational Cancer Research CenterDepartment of Life SciencesSchool of SciencesEuropean University CyprusNicosia2404Cyprus Department of Critical Care Medicine Children’s Hospital of Fudan UniversityShanghaiChina Institute of Allergy and Immunology Health Science CenterShenzhen UniversityShenzhenChina Department of Immunology School of Basic Medical ScienceCapital Medical UniversityBeijingChina Department of Medicine Johns Hopkins University School of MedicineBaltimoreMDUSA National Institute of Environmental Health Sciences National Health Research InstitutesTaiwanChina State-level Regional Children’s Medical Center Children’s Hospital of Fudan University at Xiamen(Xiamen Children’s Hospital)Fujian Provincial Key Laboratory of Neonatal DiseasesXiamenChina

Cytokine storms are crucial in the development of various inflammatory diseases,including sepsis and autoimmune *** immunosuppressive cytokine INTERLEUKIN(IL)-37 consists of five isoforms(IL-37a-e).We identified IL-37a as a nuclear cytokine for the first *** to IL-37b,IL-37a demonstrated greater efficacy in protecting against Toll-like receptor-induced cytokine hypersecretion and lethal endotoxic *** full-length(FL)form of IL-37a and the N-terminal fragment,which is processed by elastase,could translocate into cell nuclei through a distinctive nuclear localization sequence(NLS)/importin nuclear transport *** forms exerted their regulatory effects independent of the IL-1R8 receptor by transcriptionally upregulating the nuclear receptor peroxisome proliferator-activated receptor(PPARγ).This process involved the recruitment of the H3K4 methyltransferase complex WDR5/MLL4/C/EBPβand H3K4me1/2 to the enhancer/promoter of *** receptor-independent regulatory pathway of the nuclear IL-37a–PPARγaxis and receptor-dependent signaling by secreted IL-37a maintain homeostasis and are potential therapeutic targets for various inflammatory diseases,including sepsis.

关键词： IL-37 isoforms IL-37a Nuclear cytokine receptor-independent

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2种不同MR排便成像技术评价盆底疾病的前瞻性对比:空气球囊与耦合剂灌肠对比

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国际医学放射学杂志 2016年第4期 458-458页

作者： M.Francesca A.A.najwa B.Valeria M.Fabrizio I.Marileda M.Massimo 杨心悦 Department of Radiological Sciences Oncology and PathologyPoliclinico Umberto Ⅰ Hospital Sapienza University of Rome

摘要目的前瞻性比较盆底疾病(PFD)动态MRI的两种灌肠技术。材料与方法 26例盆底疾病病人在相同过程中行2种检查,一种为直肠内置入灌有生理盐水及空气的球囊导管(空气球囊技术,或AB),另一种为直肠内灌入180 cc(1 cc=1 m L)凝胶(凝胶灌肠... 详细信息

摘要目的前瞻性比较盆底疾病(PFD)动态MRI的两种灌肠技术。材料与方法 26例盆底疾病病人在相同过程中行2种检查,一种为直肠内置入灌有生理盐水及空气的球囊导管(空气球囊技术,或AB),另一种为直肠内灌入180 cc(1 cc=1 m L)凝胶(凝胶灌肠技术,或GF)。比较2种检查对

关键词：盆底阴道脱垂直肠脱垂脱肛直肠疾病 MR 直肠膨出阴道后壁膨出球囊疾病空气工业气体

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