Iranian Journal of Science and Technology, Transactions A: Science最新文献_第3页

The Action Principle for Equilibrium Thermodynamics 平衡热力学的作用原理

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-07 DOI: 10.1007/s40995-024-01747-0

Sikarin Yoo-Kong

引用次数: 0

A Note on Hopfian and Co-Hopfian S-Acts 关于Hopfian和Co-Hopfian S-Acts的注解

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-05 DOI: 10.1007/s40995-024-01753-2

Mohammad Roueentan, Roghaieh Khosravi

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Some Bounds on Estrada Index of Graphs 图的Estrada指数的若干界

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-04 DOI: 10.1007/s40995-024-01751-4

Mohammad Reza Oboudi

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Radiation Shielding and Spectroscopic Investigations of Newly Produced Co and Ni Based Super Alloys 新型Co和Ni基超级合金的辐射屏蔽和光谱研究

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-03 DOI: 10.1007/s40995-024-01761-2

Murat Aygun, Zeynep Aygun, Ercan Ercan

{"title":"Radiation Shielding and Spectroscopic Investigations of Newly Produced Co and Ni Based Super Alloys","authors":"Murat Aygun, Zeynep Aygun, Ercan Ercan","doi":"10.1007/s40995-024-01761-2","DOIUrl":"10.1007/s40995-024-01761-2","url":null,"abstract":"<div><p>With the rise in applications involving high-radiation exposure, it is imperative to implement measures to minimise the adverse effects of radiation. There is a great need for material development that can be used at high temperatures, especially in the nuclear industry. Superalloys have properties that can serve this purpose. In order to achieve this objective, new Co-based and Ni-based super alloys were produced in the study. Ni, Fe, Mo, Cr, Nb, Ti, Al, Co, Ta and W were selected for developing Co-based alloys, and Ni, Fe, Cr, Nb, Ti, Al, Co and B were selected for Ni-based alloy. The goal of the study is to obtain new materials which have better shielding performances with superior properties. In this regard, the radiation protection parameters; linear attenuation coefficients, mass attenuation coefficients, effective atomic number, half-value layer, mean free path, effective conductivity, effective electron number, exposure and energy absorption buildup factors, atomic and electron cross sections, and fast neutron attenuation cross-sections of the alloys were performed by Phy-X/PSD code. Further, EPR, XRD and EDS-SEM spectroscopic techniques were used and the results were appraised within this context. It can be noted that the content of W, Ta and Mo, due to the features of high density and high atomic number, improves the radiation attenuation efficiency of the alloys. It is also seen that the fast neutron attenuation ability is affected by Ni, Ta, Mn and Mo contents. It was concluded that the newly fabricated super alloys can be evaluated as good radiation shields in high temperature applications such as nuclear reactors.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"559 - 573"},"PeriodicalIF":1.4,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583390","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

Transcriptome Mining of MicroRNAs Involved in Terpenoid Biosynthesis and Phylogenetic Analysis in Lamiaceae Species 兰科植物萜类生物合成相关microrna的转录组挖掘及系统发育分析

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-02 DOI: 10.1007/s40995-024-01757-y

Mojgan Gholami Malekroudi, Mohammad Reza Naghavi, Mohammad Reza Ghaffari

{"title":"Transcriptome Mining of MicroRNAs Involved in Terpenoid Biosynthesis and Phylogenetic Analysis in Lamiaceae Species","authors":"Mojgan Gholami Malekroudi, Mohammad Reza Naghavi, Mohammad Reza Ghaffari","doi":"10.1007/s40995-024-01757-y","DOIUrl":"10.1007/s40995-024-01757-y","url":null,"abstract":"<div><p>Despite the importance of the regulatory role of miRNAs, their effect on terpenoids production is still poorly understood. Especially, the regulation of terpenoids biosynthesis by miRNAs in medicinal plants has a proper potential to be investigated. Since many of the known miRNAs are conserved, the prediction of plausible miRNAs is a fast, cheap, and desirable method that can be used as a screening tool to gain initial knowledge of species potential. Here, the transcriptomic data of a number of the Lamiaceae species were explored to identify miRNAs and target genes related to the terpenoids biosynthesis. Based on the results, miR1127, miR1128, miR1133, miR1436 and miR5021 were found in different species, indicating that they are likely specific to the Lamiaceae family. The highest number of predicted miRNAs involved in terpenoids biosynthesis were obtained in <i>Hyssopus officinalis</i> and <i>Lavadula angustifolia</i>. However, <i>H. officinalis</i> showed more diversity in terpenoid biosynthesis pathways, miRNA families, and predicted targets, suggesting that it may have developed a special adaptive strategy to produce diverse terpenoids through miRNA-mediated regulation. Additionally, the phylogenetic trees based on the similarities of the precursor nucleotide sequence of miRNAs manifested that many of the trees reliably recovered the phylogeny of the Lamiaceae family, in turn representing the effectiveness of miRNAs in determining the phylogenetic relationships of the species of the same family. In conclusion, the present research provides a new foundation for investigating the function of miRNAs to enrich the pathways of terpenoids biosynthesis, and their effects on determining the evolutionary relationships of species.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"585 - 604"},"PeriodicalIF":1.4,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938257","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

Green and One-step Synthesis of Fluorescent Carbon Dots with the Significant Antibacterial Effects 绿色一步法合成具有显著抗菌效果的荧光碳点

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-02 DOI: 10.1007/s40995-024-01755-0

Abolghasem Abbasi Kajani, Abdol-Khalegh Bordbar, Ali Pouresmaeili, Masoud Ayatollahi Mehrgardi

{"title":"Green and One-step Synthesis of Fluorescent Carbon Dots with the Significant Antibacterial Effects","authors":"Abolghasem Abbasi Kajani, Abdol-Khalegh Bordbar, Ali Pouresmaeili, Masoud Ayatollahi Mehrgardi","doi":"10.1007/s40995-024-01755-0","DOIUrl":"10.1007/s40995-024-01755-0","url":null,"abstract":"<div><p>Fluorescent carbon dots (CDs) have attracted great attention for the biomedical applications as a new group of nanoparticles with high biocompatibility and interesting optical properties. In this study, the fluorescent CDs were synthesized by a biogenic hydrothermal method using <i>Taxus baccata</i> extract and ethylene diamine (EDA). The CDs, predominantly semi-spherical and smaller than 20 nm, exhibit high colloidal stability. They have a hydrodynamic size of 43.6 nm, a polydispersity index (PI) of 0.526, and a zeta potential of -56.7 mV. Their surface is rich in hydroxyl and carbonyl groups. They also exhibit fluorescence emission, with a quantum yield (QY) of 11.6% at 490 nm, when excited at 400 nm. The in vitro cytotoxicity assay on the human fibroblast (HFB) and umbilical vein endothelial (HUVEC) cells confirmed the biocompatibility of CDs. These CDs represent significant antibacterial effects on <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> with the minimum inhibitory concentrations (MIC) of 40 and 160 μg mL<sup>− 1</sup>, respectively. The rapid and efficient uptake of CDs with <i>E. coli</i> and HFB cells was confirmed by the fluorescence imaging. Based on the results, the biogenic CDs can be a suitable alternative to the antibiotics against pathogenic bacteria and also for the staining and labeling of the microbial cells.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"577 - 584"},"PeriodicalIF":1.4,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938269","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

Comparing Melting Curves of Metals Using the Equation of State and Lindemann's Law 用状态方程和林德曼定律比较金属的熔化曲线

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-02 DOI: 10.1007/s40995-024-01748-z

Abhay P. Srivastava, Brijesh K. Pandey, Abhishek K. Gupta, Sachchidanand Shukla

{"title":"Comparing Melting Curves of Metals Using the Equation of State and Lindemann's Law","authors":"Abhay P. Srivastava, Brijesh K. Pandey, Abhishek K. Gupta, Sachchidanand Shukla","doi":"10.1007/s40995-024-01748-z","DOIUrl":"10.1007/s40995-024-01748-z","url":null,"abstract":"<div><p>Our study’s primary goal is to accurately predict the equation of state required for calculating the pressure-dependent melting curves of metals. We introduce a unique model for the melting curve, utilizing various equations of state (EOS) such as Murnaghan EOS, Kholiya EOS, Goyal-Gupta EOS, Usual-Tait EOS, Singh and Kao EOS, and Modified Lennard–Jones EOS. This model, rigorously tested and compared with Lindemann’s and available experimental data, establishes the relationship among pressure, bulk modulus, pressure derivative of bulk modulus, and volume compression. Our findings conclusively demonstrate that a significant increase in melting temperature is directly linked to a substantial rise in bulk modulus and a gradual decrease in the first-order pressure derivative of bulk modulus. This study provides unprecedented insights into the fundamental understanding of the effect of pressure on melting temperature. The model we have developed is highly reliable for extrapolating melting temperature to high pressure, instilling confidence in its application. Notably, our study finds that Murnaghan EOS is more suitable for predicting the melting temperature of the metal. Importantly, our results agree with Lindemann’s law and experimental values, validating our approach.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"871 - 887"},"PeriodicalIF":1.4,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938354","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

Jasminum Fluminense Leaf Extract Mediated Eu-ZrO2 Nanoparticles: Dual Functionality in Textile Dye Photodegradation and Bacterial Pathogen Control 茉莉叶提取物介导的Eu-ZrO2纳米颗粒：在纺织染料光降解和细菌病原体控制中的双重功能

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-27 DOI: 10.1007/s40995-024-01735-4

S. Vishalee, T. Divya, P. Sridhar, P. Palani, K. Venkatachalam

{"title":"Jasminum Fluminense Leaf Extract Mediated Eu-ZrO2 Nanoparticles: Dual Functionality in Textile Dye Photodegradation and Bacterial Pathogen Control","authors":"S. Vishalee, T. Divya, P. Sridhar, P. Palani, K. Venkatachalam","doi":"10.1007/s40995-024-01735-4","DOIUrl":"10.1007/s40995-024-01735-4","url":null,"abstract":"<div><p>Green synthesis of metal oxide nanoparticles provides an eco-friendly alternative to conventional chemical approaches. This study focuses on synthesizing pure zirconium dioxide (ZrO<sub>2</sub>) and europium-doped zirconium dioxide (Eu-ZrO<sub>2</sub>) nanoparticles using <i>Jasminum fluminense</i> leaf extract. These materials were evaluated for their effectiveness in photocatalytic degradation of textile dyes and their ability to control bacterial pathogens. Physicochemical analyses, including XRD and EDX, confirmed the crystalline nature and also the purity of the synthesized nanoparticles. ZrO<sub>2</sub> and Eu-ZrO<sub>2</sub> were evaluated for degrading the anionic dye Brilliant Blue G and the cationic dye Nile Blue Sulfate. Eu-ZrO<sub>2</sub> demonstrated over 94% degradation efficiency for both dyes. The antimicrobial activity was assessed through the Agar well diffusion method against different bacterial strains including <i>Enterococcus aeruginosa, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi,</i> and <i>Shigella dysenteriae</i>. Eu-ZrO<sub>2</sub> exhibited a substantial inhibition zone of 48 mm against <i>Salmonella typhi</i>, demonstrating potent antibacterial properties.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"605 - 625"},"PeriodicalIF":1.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938694","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

Correction to: Acantholimon brevispicatum (Plumbaginaceae) a New Species from Southeastern Iran Based on Morphological and Molecular Data 基于形态和分子资料的伊朗东南部一新种——短葶棘花（Plumbaginaceae）的更正

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-27 DOI: 10.1007/s40995-024-01746-1

Hossein Bibak, Shahrokh Kazempour-Osaloo, Mostafa Assadi

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Unveiling Complexity: A Discrete-Time Prey–Predator Model with Immigration Effects 揭示复杂性：一个具有移民效应的离散时间猎物-捕食者模型

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-19 DOI: 10.1007/s40995-024-01742-5

Halima Benali, Karima Mokni, Hajar Mouhsine, Mohamed Ch-Chaoui

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