Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.noqe5610
T. S. Kiruthika, B. Deepan Kumar, V. Jaisankar
Cellulose-based polymeric composites have received considerable attention as appealing biomimetic alternatives for a variety of biological applications because of their unique mechanical characteristics and appreciable bioactivity. In this investigation, four ternary polymeric composites were prepared, with cellulose serving as a typical common - -TCP) serving as a common bioceramic component. The naturally available hemp was used for the isolation of cellulose. The solution precipitation process was used to cr -TCP. Cellulose/Agar- -TCP, Cellulose/I- -TCP, Cellulose/Polyvinyl alcohol - -TCP were the four polymeric composites prepared. The thermal and mechanical properties of the prepared composites were analysed and were compared. The SEM images of these materials indicated that the presence -TCP in the composites reveals notable morphological changes in the surface that are appropriate for the cell adhesion nature. The antimicrobial properties such as antibacterial, antifungal, anticancer and in vitro wound healing ability of the prepared composites open a new perspective in the applications for biomaterials field.
{"title":"Effect of addition of fillers on Cellulose/β-TCP polymer Composites: Thermal, Mechanical and Antimicrobial Properties","authors":"T. S. Kiruthika, B. Deepan Kumar, V. Jaisankar","doi":"10.59143/isas.jisas.2.2.noqe5610","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.noqe5610","url":null,"abstract":"Cellulose-based polymeric composites have received considerable attention as appealing biomimetic alternatives for a variety of biological applications because of their unique mechanical characteristics and appreciable bioactivity. In this investigation, four ternary polymeric composites were prepared, with cellulose serving as a typical common - -TCP) serving as a common bioceramic component. The naturally available hemp was used for the isolation of cellulose. The solution precipitation process was used to cr -TCP. Cellulose/Agar- -TCP, Cellulose/I- -TCP, Cellulose/Polyvinyl alcohol - -TCP were the four polymeric composites prepared. The thermal and mechanical properties of the prepared composites were analysed and were compared. The SEM images of these materials indicated that the presence -TCP in the composites reveals notable morphological changes in the surface that are appropriate for the cell adhesion nature. The antimicrobial properties such as antibacterial, antifungal, anticancer and in vitro wound healing ability of the prepared composites open a new perspective in the applications for biomaterials field.","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"2022 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135813668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.kcna4459
K. Deepa, M. Leo Edward, A. Shalini, V. Jaisankar
Natural polymer based nanocomposites have received attention in research due their biocompatible nature and their versatile application in medical field. In the current investigation, we report the synthesize of chitosan /magnesium oxide nanoparticle (CS/MgO) composite material. The prepared sample was characterized by analytical methods such as FTIR, XRD and HRSEM.The antibacterial activity of the CS/MgO composite was evaluated. FT-IR spectral results showed the CS/MgO composite has distinctive functional groups. HR SEM images revealed that the formation of well dispersed MgO nanoparticles in CS and it is observed that the MgO nanoparticles are embedded between the functional moieties present in the chitosan which shows the good interaction between chitosan and MgO nanoparticles. The antibacterial activity of the composite was evaluated against Staphylococcus aureus and Escherichia coli. It is observed that the CS/MgO composite material showed comparatively higher inhibition against E. coli than S.aureus
{"title":"Preparation of Inorganic Composites of Chitosan/magnesium Oxide Nanoparticle for Antibacterial Activity","authors":"K. Deepa, M. Leo Edward, A. Shalini, V. Jaisankar","doi":"10.59143/isas.jisas.2.2.kcna4459","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.kcna4459","url":null,"abstract":"Natural polymer based nanocomposites have received attention in research due their biocompatible nature and their versatile application in medical field. In the current investigation, we report the synthesize of chitosan /magnesium oxide nanoparticle (CS/MgO) composite material. The prepared sample was characterized by analytical methods such as FTIR, XRD and HRSEM.The antibacterial activity of the CS/MgO composite was evaluated. FT-IR spectral results showed the CS/MgO composite has distinctive functional groups. HR SEM images revealed that the formation of well dispersed MgO nanoparticles in CS and it is observed that the MgO nanoparticles are embedded between the functional moieties present in the chitosan which shows the good interaction between chitosan and MgO nanoparticles. The antibacterial activity of the composite was evaluated against Staphylococcus aureus and Escherichia coli. It is observed that the CS/MgO composite material showed comparatively higher inhibition against E. coli than S.aureus","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"81 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135869365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.metn2363
P. Gayathri, P. Udhayakala
The reliability of the product that will arise from the millions of reactions that are taking place in interstellar medium is dependent on the analysis of the rate constant. The current investigation is a chemical modelling research performed with Density Functional Theory (DFT) studies utilizing a foundation set of B3LYP 6-311++ G (d, p). The hydrolysis of methyl acetate in the interstellar medium is described using the quantum chemical parameters EHOMO (highest occupied molecular orbital energy), ELUMO (lowe probable reactive sites of the interstellar chemical methyl acetate in the ISM condition, the local reactivity descriptors Fukui function, NBO, and MEP were analysed in depth. The thermo chemical investigation contributed to the improvement of the chemical reaction mechanism and the calculation of the rate constant of the species under investigation results in the analysis of feasibility of the reaction under study.
在星际介质中发生的数以百万计的反应所产生的产物的可靠性取决于对速率常数的分析。目前的研究是利用b3lyp6 -311++ G (d, p)的基础集，利用密度泛函数理论(DFT)进行的化学建模研究。醋酸甲酯在星际介质中的水解是用量子化学参数EHOMO(最高占据分子轨道能量)、ELUMO (ISM条件下星际化学醋酸甲酯的低可能反应位点)、局部反应描述符Fukui函数、NBO、和MEP进行了深入分析。热化学研究有助于改进化学反应机理，计算被研究物质的速率常数有助于分析被研究反应的可行性。
{"title":"Quantum Chemical Reactivity Investigation on ism Methyl Acetate Through DFT Studies","authors":"P. Gayathri, P. Udhayakala","doi":"10.59143/isas.jisas.2.2.metn2363","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.metn2363","url":null,"abstract":"The reliability of the product that will arise from the millions of reactions that are taking place in interstellar medium is dependent on the analysis of the rate constant. The current investigation is a chemical modelling research performed with Density Functional Theory (DFT) studies utilizing a foundation set of B3LYP 6-311++ G (d, p). The hydrolysis of methyl acetate in the interstellar medium is described using the quantum chemical parameters EHOMO (highest occupied molecular orbital energy), ELUMO (lowe probable reactive sites of the interstellar chemical methyl acetate in the ISM condition, the local reactivity descriptors Fukui function, NBO, and MEP were analysed in depth. The thermo chemical investigation contributed to the improvement of the chemical reaction mechanism and the calculation of the rate constant of the species under investigation results in the analysis of feasibility of the reaction under study.","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"12 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135871065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.iawx1959
M. S. Gupte
The paper presents a study on the diffusion behaviour of ferric ions within an agar gel medium containing zinc sulfate electrolyte. Investigations for various aspects, including the obstruction effect introduced by the agar gel, the validation of Wang's diffusion model, and the suitability of applying transition state theory to the diffusion of Fe3+ ions in an agar gel medium with zinc sulfate were made. This investigation involved optimising the gel concentration, electrolyte concentration, and system temperature. The diffusion coefficients are determined by the zone diffusion technique. The results reveal that the activation energy (E) decreases as the electrolyte concentration increases, aligning with Wang's model. This decrease is attributed to the disruption of the water structure induced by ions and agar molecules. Additionally, for a fixed electrolyte concentration, the activation energy decreases with the cubic root of the weight percent of agar (W1/3), while the diffusion coefficient (Do) decreases with the square of the reciprocal of the weight percent of agar (W-2/3). This behaviour is consistent with the principles of the transition state theory of diffusion.
{"title":"Diffusion of Fe3+ Ions in Agar Gel Medium Containing Zinc Sulfate: Obstruction effect and Activation Energy","authors":"M. S. Gupte","doi":"10.59143/isas.jisas.2.2.iawx1959","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.iawx1959","url":null,"abstract":"The paper presents a study on the diffusion behaviour of ferric ions within an agar gel medium containing zinc sulfate electrolyte. Investigations for various aspects, including the obstruction effect introduced by the agar gel, the validation of Wang's diffusion model, and the suitability of applying transition state theory to the diffusion of Fe3+ ions in an agar gel medium with zinc sulfate were made. This investigation involved optimising the gel concentration, electrolyte concentration, and system temperature. The diffusion coefficients are determined by the zone diffusion technique. The results reveal that the activation energy (E) decreases as the electrolyte concentration increases, aligning with Wang's model. This decrease is attributed to the disruption of the water structure induced by ions and agar molecules. Additionally, for a fixed electrolyte concentration, the activation energy decreases with the cubic root of the weight percent of agar (W1/3), while the diffusion coefficient (Do) decreases with the square of the reciprocal of the weight percent of agar (W-2/3). This behaviour is consistent with the principles of the transition state theory of diffusion.","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"116 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135863320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.qonr9019
A. Shalini, K. Pandian, K. Deepa, V. Jaisankar
Nitric oxide plays a crucial and important role in cellular physiology and also functions as a human cancer signaling molecule. Nitric oxide (NO) also exhibits antimicrobial and antitumor properties. However, conventional detection methods have their own limitations in the detection of NO at low concentrations because of its high reactivity and low lifetime. Here, we report a strategy to graphene oxide (GO)-modified polyaniline with efficiency to detect NO at a low concentration by electrocatalytic method. For this study we prepared graphene oxide polyaniline (GO-PANI) which has higher stability and stronger catalytic activity towards the oxidation of nitric oxide (NO).The synthesized compound was characterized by field emission scanning electron microscopy (FESEM) and UV-visible spectroscopy. With further modification of Nafion, the determination of NO in PBS with different concentration .This investigation offers a different method for determination of NO.
{"title":"Synthesis Of Graphene Oxide Modified Polyaniline And Its Electrochemical Application For Detection of Nitric Oxide","authors":"A. Shalini, K. Pandian, K. Deepa, V. Jaisankar","doi":"10.59143/isas.jisas.2.2.qonr9019","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.qonr9019","url":null,"abstract":"Nitric oxide plays a crucial and important role in cellular physiology and also functions as a human cancer signaling molecule. Nitric oxide (NO) also exhibits antimicrobial and antitumor properties. However, conventional detection methods have their own limitations in the detection of NO at low concentrations because of its high reactivity and low lifetime. Here, we report a strategy to graphene oxide (GO)-modified polyaniline with efficiency to detect NO at a low concentration by electrocatalytic method. For this study we prepared graphene oxide polyaniline (GO-PANI) which has higher stability and stronger catalytic activity towards the oxidation of nitric oxide (NO).The synthesized compound was characterized by field emission scanning electron microscopy (FESEM) and UV-visible spectroscopy. With further modification of Nafion, the determination of NO in PBS with different concentration .This investigation offers a different method for determination of NO.","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135871009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.qdai6853
Amruta Bang, Parag Adhyapak
Herein, we report, a simple breath sensor based on Au/PVDF nanocomposites. Au nanostructures have been synthesized by using a simple seed mediated growth method. The synthesized Au nanostructures exhibited uniform spherical morphology with average diameter ~20 nm, confirmed by FESEM analysis. The synthesized nanostructures were further used to form nanocomposites with Polyvinylidene Fluoride (PVDF). The synthesized Au nanospheres as well as Au nanospheres/PVDF nanocomposites were tested for breath analysis. The nanocomposite materials were found to sense breath and uniform breathing patterns were generated. During breathing over sensor, voltage gets generated. The maximum voltage obtained was around 280 mV in breathing cycle.
{"title":"Synthesis of Au nanospheres, Au/PVDF nanocomposites and their breath sensing properties","authors":"Amruta Bang, Parag Adhyapak","doi":"10.59143/isas.jisas.2.2.qdai6853","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.qdai6853","url":null,"abstract":"Herein, we report, a simple breath sensor based on Au/PVDF nanocomposites. Au nanostructures have been synthesized by using a simple seed mediated growth method. The synthesized Au nanostructures exhibited uniform spherical morphology with average diameter ~20 nm, confirmed by FESEM analysis. The synthesized nanostructures were further used to form nanocomposites with Polyvinylidene Fluoride (PVDF). The synthesized Au nanospheres as well as Au nanospheres/PVDF nanocomposites were tested for breath analysis. The nanocomposite materials were found to sense breath and uniform breathing patterns were generated. During breathing over sensor, voltage gets generated. The maximum voltage obtained was around 280 mV in breathing cycle.","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"117 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135871730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.59143/isas.jisas.2.2.izrv7844
Dinesh Amalnerkar
Dr.Manisha Bora has come with handy booklet on hermal and Hydrothermal Techniques for Nano- in the same timeframe of October 2023 when Nobel prize in Chemistry has been awarded to three American Professors Bawendi, Brus and Yekimov for their pioneering research on Q Dots, the tiniest components of nanotechnology. What a great coincidence! This booklet is thus a timely and welcome addition in the sphere of nanotechnology. It comprises in all 12 chapters followed by apt references at the end. Illustrative figures and synthesis equations are provided at appropriate places. Table-1 furnishes summary of hydrothermal and solvothermal reaction conditions for the synthesis of typical nanomaterials and their focussed end-applications. It is well established that hydrothermal/solvothermal synthesis conditions lead to formation of nanostructures with complex morphological features/ hierarchical nano- architecture which, in turn, can enhance the utility of the envisaged end-application. Perhaps, inclusion of representative FESEM and FETEM images in this booklet could have been very useful for clarity on nano-scale formation and also to prove the merits of hydrothermal/solvothermal
{"title":"Review of the Booklet : Solvothermal and Hydrothermal Techniques for Nano-synthesis: An Overview by Dr. Manisha Bora","authors":"Dinesh Amalnerkar","doi":"10.59143/isas.jisas.2.2.izrv7844","DOIUrl":"https://doi.org/10.59143/isas.jisas.2.2.izrv7844","url":null,"abstract":"Dr.Manisha Bora has come with handy booklet on hermal and Hydrothermal Techniques for Nano- in the same timeframe of October 2023 when Nobel prize in Chemistry has been awarded to three American Professors Bawendi, Brus and Yekimov for their pioneering research on Q Dots, the tiniest components of nanotechnology. What a great coincidence! This booklet is thus a timely and welcome addition in the sphere of nanotechnology. It comprises in all 12 chapters followed by apt references at the end. Illustrative figures and synthesis equations are provided at appropriate places. Table-1 furnishes summary of hydrothermal and solvothermal reaction conditions for the synthesis of typical nanomaterials and their focussed end-applications. It is well established that hydrothermal/solvothermal synthesis conditions lead to formation of nanostructures with complex morphological features/ hierarchical nano- architecture which, in turn, can enhance the utility of the envisaged end-application. Perhaps, inclusion of representative FESEM and FETEM images in this booklet could have been very useful for clarity on nano-scale formation and also to prove the merits of hydrothermal/solvothermal","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135871889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.59143/isas.jisas.1.4.wcjb9374
Yamuna Singh
A brief account of role of X-ray diffraction (XRD) in mineralogical research with special reference to radioactive and atomic minerals is given. Aspects of research methodology such as sample preparation, analysis time, limitations, search match methods for identification, and complimentary techniques are also given. The most common applications of XRD in mineralogical researches related to radioactive/atomic minerals include identification of primary and secondary uranium and associated ore and gangue minerals, determination of the oxidation grade of uraninites, identification of Th, Nb, Ta, Sn, Be, Li, Zr, Hf, Ti, rare-earth elements (REE) minerals, investigations on degree of structural disordering in Nb-Ta minerals, X-ray crystallographic and substitutional solid solution studies, clay minerals, triclinicity of K-feldspar, metamict minerals and influence of the degree of metamictisation on uranium beneficiation, characterisation of leached residue, beneficiated, heat-treated products, metallurgical slags and other mineralogical studies. The results of mineralogical research are used for elucidating physicochemical conditions and geologic processes that prevailed during mineral formation
简要介绍了x射线衍射(XRD)在矿物学研究中的作用，特别是对放射性矿物和原子矿物的研究。研究方法方面，如样品制备，分析时间，限制，搜索匹配方法鉴定，并补充技术也给出了。在与放射性/原子矿物相关的矿物学研究中，XRD最常见的应用包括原生和次生铀及其伴生矿石和脉石矿物的鉴定，铀矿石氧化品位的测定，Th, Nb, Ta, Sn, Be, Li, Zr, Hf, Ti，稀土元素(REE)矿物的鉴定，Nb-Ta矿物结构无序程度的研究，x射线晶体学和取代固溶体研究，粘土矿物，钾长石、变质矿物的三斜性以及变质程度对铀选矿、浸出渣、选矿、热处理产品、冶金渣和其他矿物学研究的影响。矿物学研究的结果用于阐明矿物形成过程中的物理化学条件和地质过程
{"title":"X-Ray Diffraction in Mineralogical Research","authors":"Yamuna Singh","doi":"10.59143/isas.jisas.1.4.wcjb9374","DOIUrl":"https://doi.org/10.59143/isas.jisas.1.4.wcjb9374","url":null,"abstract":"A brief account of role of X-ray diffraction (XRD) in mineralogical research with special reference to radioactive and atomic minerals is given. Aspects of research methodology such as sample preparation, analysis time, limitations, search match methods for identification, and complimentary techniques are also given. The most common applications of XRD in mineralogical researches related to radioactive/atomic minerals include identification of primary and secondary uranium and associated ore and gangue minerals, determination of the oxidation grade of uraninites, identification of Th, Nb, Ta, Sn, Be, Li, Zr, Hf, Ti, rare-earth elements (REE) minerals, investigations on degree of structural disordering in Nb-Ta minerals, X-ray crystallographic and substitutional solid solution studies, clay minerals, triclinicity of K-feldspar, metamict minerals and influence of the degree of metamictisation on uranium beneficiation, characterisation of leached residue, beneficiated, heat-treated products, metallurgical slags and other mineralogical studies. The results of mineralogical research are used for elucidating physicochemical conditions and geologic processes that prevailed during mineral formation","PeriodicalId":484338,"journal":{"name":"Journal of ISAS","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135668135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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