Iranian Journal of Science and Technology, Transactions A: Science最新文献_第6页

XRD Peak Profile and Inverse Pole Figure Analysis of Ceria (CeO2) Nanoparticles 氧化铈（CeO2）纳米颗粒的 XRD 峰谱和反极图分析

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01710-z

R. Vettumperumal, N. R. Dhineshbabu, Elumalai PV, Chan Choon Kit

{"title":"XRD Peak Profile and Inverse Pole Figure Analysis of Ceria (CeO2) Nanoparticles","authors":"R. Vettumperumal, N. R. Dhineshbabu, Elumalai PV, Chan Choon Kit","doi":"10.1007/s40995-024-01710-z","DOIUrl":"10.1007/s40995-024-01710-z","url":null,"abstract":"<div><p>The pursuit of identifying and enhancing a preferred grain texture has emerged as a viable approach to improve functional properties. X-ray and neutron diffraction techniques have proven to be invaluable tools for probing crystallographic textures. In this study, ceria (CeO2) nanoparticles were synthesized via the precipitation method, and their structural and morphological characteristics were investigated through X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analyses. The inconsistent behavior in the long-range two theta values of CeO<sub>2</sub> is elucidated from the crystallite size and strain plot. Hence, the XRD peak profile of the CeO<sub>2</sub> nanoparticles can be assessed through the Williamson – Hall (W-H), size strain plot (SSP), and Halder – Wagner (H-W) method. Among these, The Halder – Wagner method gives better structural parameter values and it confirms the existence of compressive strain in the CeO<sub>2</sub> lattice. Plane orientation, distribution, and position of Ce and O<sub>2</sub> atoms in the CeO<sub>2</sub> lattice are confirmed from the Rietveld refinement and texture analysis using GSAS – II. The regions of highest pole densities coincide with the (111) positions from the standard stereographic projection (001) which confirms the majority of particles in CeO<sub>2</sub> nanoparticles are aligned along the (001) plane.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1653 - 1661"},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Class of Fractional Order Nonlinear Volterra–Fredholm Integro-Differential IVPs and BVPs: Qualitative Analysis and Numerical Investigation 一类分数阶非线性Volterra-Fredholm积分-微分ivp和bvp：定性分析和数值研究

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01713-w

Bapan Ali Miah, Mausumi Sen, R. Murugan, Damini Gupta

{"title":"A Class of Fractional Order Nonlinear Volterra–Fredholm Integro-Differential IVPs and BVPs: Qualitative Analysis and Numerical Investigation","authors":"Bapan Ali Miah, Mausumi Sen, R. Murugan, Damini Gupta","doi":"10.1007/s40995-024-01713-w","DOIUrl":"10.1007/s40995-024-01713-w","url":null,"abstract":"<div><p>In this work, we have examined a class of fractionally ordered Volterra–Fredholm integro-differential equations (VFIDE), where the fractional derivative has been interpreted in the Riemann–Liouville sense. We have focused separate attention on the boundary value problems (BVPs) and initial value problems (IVPs). Each of these problems has been reduced to a fractional order Volterra–Fredholm integral equation of the second kind using Leibnitz’s formula to simplify the analysis. We have derived sufficient conditions for the existence and uniqueness of the solutions to the IVPs and BVPs. We have used Banach’s fixed point and Schaefer’s fixed point theorems to prove the existence and uniqueness results for the considered problems. An operator-based approach using Laplace discrete modified Adomian decomposition methods based on Bernstein polynomials has been considered to approximate their solutions. The convergence and error analysis of the proposed method has also been investigated. We have compared the method with the Homotopy perturbation method for the considered problems. Some numerical examples have been provided to validate the theoretical results.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"225 - 241"},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Fermat-Type Binomial Equations Involving Differential Difference Form in Higher Dimensional Complex Plane 论涉及高维复平面差分形式的费马型二项式方程

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01716-7

Goutam Haldar, Abhijit Banerjee

引用次数: 0

Existence of Positive Solutions of a Fractional Dynamic Equation Involving Integral Boundary Conditions on Time Scales 涉及时间尺度上积分边界条件的分数动态方程正解的存在性

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-24 DOI: 10.1007/s40995-024-01691-z

Bikash Gogoi, Utpal Kumar Saha, Bipan Hazarika, Ravi P. Agarwal

引用次数: 0

Constrained Bayesian Methods for Union-Intersection and Intersection-Union Hypotheses Testing Problems 联合-交叉和交叉-联合假设检验问题的约束贝叶斯方法

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-24 DOI: 10.1007/s40995-024-01693-x

K. J. Kachiashvili, A. SenGupta

引用次数: 0

A Robust Higher-Order Scheme for Fractional Delay Differential Equations Involving Caputo Derivative 涉及卡普托导数的分式延迟微分方程的稳健高阶方案

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-22 DOI: 10.1007/s40995-024-01695-9

Biswajit Prusty, Madhukant Sharma

引用次数: 0

Investigations of Thermo-Elastic Properties of Mono Atomic and Diatomic Solids at High Pressure Using New EOS 利用新 EOS 研究单原子和双原子固体在高压下的热弹性特性

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-22 DOI: 10.1007/s40995-024-01690-0

Shivam Srivastava, Prachi Singh, Anjani Kumar Pandey, Chandra Kumar Dixit

引用次数: 0

The Effect of Surface Roughness and Deposition Time on the Biocompatibility of Electrodeposited Hydroxyapatite Coating on Grit-Blasted AZ31B Mg Alloy 表面粗糙度和沉积时间对砂喷AZ31B镁合金电沉积羟基磷灰石涂层生物相容性的影响

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-19 DOI: 10.1007/s40995-024-01701-0

F. Hussain, M. U. Manzoor, M. Kamran, F. Riaz, M. Ammar, A. Mansoor, H. M. R. Tariq, M. H. Hassan, M. Ishtiaq

{"title":"The Effect of Surface Roughness and Deposition Time on the Biocompatibility of Electrodeposited Hydroxyapatite Coating on Grit-Blasted AZ31B Mg Alloy","authors":"F. Hussain, M. U. Manzoor, M. Kamran, F. Riaz, M. Ammar, A. Mansoor, H. M. R. Tariq, M. H. Hassan, M. Ishtiaq","doi":"10.1007/s40995-024-01701-0","DOIUrl":"10.1007/s40995-024-01701-0","url":null,"abstract":"<div><p>Magnesium alloys have demonstrated tremendous potential as bio-implants due to their superior biomedical properties. This study examines the influence of surface roughness on the electrodeposition of Hydroxyapatite (HA) coatings on AZ31B magnesium alloy samples. We investigated samples grit-blasted with quartz and alumina at various pressures and compared them with un-blasted samples to ensure a comprehensive analysis across different deposition times. Higher blasting pressure resulted in increased surface roughness. Overall, samples blasted with alumina exhibited greater surface roughness and thicker coatings. X-ray diffraction (XRD)analysis confirmed the presence of HA coatings. Scanning electron microscope (SEM) analysis revealed that HA coating thickness increased with longer deposition times. Open circuit potential (OCP) measurements indicated that alumina-blasted samples showed nearly complete coverage with a 10-minute HA deposition at 700 kPa (approximately − 0.336 V), with increased compactness and more positive OCP values observed with longer deposition times. Complete insulated coverage was achieved at 40 min, with OCP values of -0.075 V at 700 kPa and − 0.049 V at 1000 kPa. Statistical analysis using ANOVA demonstrated that both blasting pressure and deposition time significantly impact coating thickness, with blasting pressure having a primary effect on OCP. Higher OCP values indicated a 95% increase in corrosion resistance at a blasting pressure of 1000 kPa and a 40-minute deposition time for alumina-blasted samples. The Ca/P ratio (∼ 1.67) and XRD patterns consistently confirmed the HA phase.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"283 - 296"},"PeriodicalIF":1.4,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40995-024-01701-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Antiproliferative, Cytotoxic and Proapoptotic Properties of Virkon-S in Carp Epithelioma Papulosum Cells 探索 Virkon-S 在鲤鱼上皮乳头状瘤细胞中的抗增殖、细胞毒性和促凋亡特性

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-17 DOI: 10.1007/s40995-024-01692-y

Hüseyin Izgördü, Canan Vejselova Sezer, Nesil Ertorun, Hatice Mehtap Kutlu

{"title":"Exploring the Antiproliferative, Cytotoxic and Proapoptotic Properties of Virkon-S in Carp Epithelioma Papulosum Cells","authors":"Hüseyin Izgördü, Canan Vejselova Sezer, Nesil Ertorun, Hatice Mehtap Kutlu","doi":"10.1007/s40995-024-01692-y","DOIUrl":"10.1007/s40995-024-01692-y","url":null,"abstract":"<div><p><i>Cyprinus carpio</i> is one of most produced fish species farmed in Turkey. There are many factors comprising with the viral diseases that reduce productivity and cause significant economic losses in carp production. <i>Epithelioma papulosum cyprini</i> (EPC) is of the viral diseases with high infection and mortality rates. For prevention of parasitic diseases disinfectants have been used but due to the potential genotoxicity and cytotoxic effects alternative non-toxic agents are required. The biocompatible, and non-toxic disinfectant Virkon-S is recommended by FAO for this manner but its application on <i>Epithelioma papulosum cyprini</i>, but its usage on this disease has not yet been researched. The aim of this study was to investigate the cytotoxic, antiproliferative and proapoptotic effects of Virkon-S on EPC cells. Cytotoxicity, morphological and ultrastructural changes were investigated by MTT assay, confocal and transmission electron microscopy (TEM) techniques. Cell death mode was investigated by Annexin-V and Caspase 3/7 analysis. Cytotoxicity and apoptosis was detected on Virkon-S treated EPC cells. Also, TEM results revealed that Virkon-S notably changed the ultrastructure of EPC cells together with indications like swollen mitochondria, loss of cristae and membrane blebbings. The study results showed that Virkon-S has cytotoxic, antiproliferative and proapoptotic effects on EPC cells and might be used for prevention of EPC disease after deeper <i>in vivo</i> investigations. These findings collectively suggest the induction of cytotoxicity on the cellular ultrastructure. Furthermore, in alignment with the findings from confocal microscopy, it can be concluded that Virkon-S triggers apoptosis in EPC cells.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 5","pages":"1125 - 1133"},"PeriodicalIF":1.4,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing Regulation of ERG and its Target Proteins by ERG Isoform 8 评估 ERG 异构体 8 对 ERG 及其靶蛋白的调控作用

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-15 DOI: 10.1007/s40995-024-01683-z

Rizwan Ullah Khan, Sidra Mumtaz, Muhammad Imran Sohail, Naila Malkani

{"title":"Assessing Regulation of ERG and its Target Proteins by ERG Isoform 8","authors":"Rizwan Ullah Khan, Sidra Mumtaz, Muhammad Imran Sohail, Naila Malkani","doi":"10.1007/s40995-024-01683-z","DOIUrl":"10.1007/s40995-024-01683-z","url":null,"abstract":"<div><p>Ets-related gene (ERG) is a key protein in vascular homeostasis. It has multiple isoforms. These isoforms have predominant nuclear localization except ERG isoform 8. This isoform can modify the nuclear localization of other isoforms and can down-regulate other isoforms. However, the mechanism of this regulation and its impact on ERG target proteins is still unclear. This study is designed to analyze the effects of ERG8 on functional aspects of other isoforms. For this purpose, the expressions of ERG3 target genes; VE-cad, sox4, cxcr4 were analyzed after ERG8 and ERG3 co-transfection. Increasing ERG8 to ERG3 ratios were transfected in 293-HEK cells. qPCR analysis was performed on total RNA extracted from transfected cells to evaluate the changes in expression of target genes. Results showed that ERG3 alone significantly increased the expression of these target genes (p˂0.05). However, the increasing concentrations of ERG8 progressively decreased the expression of the target genes significantly (p˂0.05). For in silico prediction of the nature of ERG3-ERG8 interaction, their three-dimensional models were built using I-TASSER and interaction was predicted using HADDOCK 2.4. HADDOCK scores show that ERG8 via its pointed (PNT) domain can interact with Ets domain of ERG3 (HADDOCK score; -28.956 +/- 15.881) as well as PNT domain (HADDOCK score; -4.426 +/- 7.770). Our results indicate that ERG8 affect the transcription factor activity of ERG3 by hindering its binding with the DNA either through PNT or Ets domain</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 5","pages":"1081 - 1086"},"PeriodicalIF":1.4,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0