In most of the traditional cluster-based hierarchical routing protocols, the cluster head (CH) selection is made on a random basis. As a result, some unlucky sensor nodes (SNs) become dead quickly; thereby, network lifetime reduces drastically. To overcome this problem, in this paper, a new cluster-based routing protocol- Energy-Aware Threshold Sensitive Stable Election Protocol (EATSEP) is presented for wireless sensor networks (WSNs). In the EATSEP protocol, the CH selection is an optimum process where the initial and residual energy of each SNs are considered within a heterogeneous SNs energy environment. Additionally, our proposed EATSEP protocol has managed to reduce long-distance transmission by routing data among CHs to the base station. In our present study, we have simulated the EATSEP protocol through MATLAB to compare its performance with other popular protocols under some well-known performance metrics. The experimental results indicate that the network stability of the EATSEP protocol improves by 80.81, 66.41, and 27.06 %, respectively, compared to the low-energy adaptive clustering hierarchy (LEACH), Stable Election Protocol (SEP), and Threshold Sensitive SEP under a particular setting. In terms of energy consumption and network throughput, the EATSEP is also superior to other protocols.
{"title":"Energy-Aware Threshold Sensitive Stable Election Protocol (EATSEP) for Wireless Sensor Networks","authors":"B. Sarkar, M. G. Rashed, D. Das, R. Yasmin","doi":"10.3329/jsr.v14i2.55330","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.55330","url":null,"abstract":"In most of the traditional cluster-based hierarchical routing protocols, the cluster head (CH) selection is made on a random basis. As a result, some unlucky sensor nodes (SNs) become dead quickly; thereby, network lifetime reduces drastically. To overcome this problem, in this paper, a new cluster-based routing protocol- Energy-Aware Threshold Sensitive Stable Election Protocol (EATSEP) is presented for wireless sensor networks (WSNs). In the EATSEP protocol, the CH selection is an optimum process where the initial and residual energy of each SNs are considered within a heterogeneous SNs energy environment. Additionally, our proposed EATSEP protocol has managed to reduce long-distance transmission by routing data among CHs to the base station. In our present study, we have simulated the EATSEP protocol through MATLAB to compare its performance with other popular protocols under some well-known performance metrics. The experimental results indicate that the network stability of the EATSEP protocol improves by 80.81, 66.41, and 27.06 %, respectively, compared to the low-energy adaptive clustering hierarchy (LEACH), Stable Election Protocol (SEP), and Threshold Sensitive SEP under a particular setting. In terms of energy consumption and network throughput, the EATSEP is also superior to other protocols.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86484866","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}
An enormous volume of data transmitted through the internet in every second nowadays, so data protection is still a big challenge as communication channels are mostly public. Several approaches are there for protection of data when transmitted through the network channel, cryptography is one of them. Cryptography is a technique to hide original and confidential information from intruder. Considering information security principles i.e. confidentiality, integrity, and availability (CIA-triad) an efficient, portable, dynamic, and simple, artificial neural network (ANN) based cryptography algorithm have been presented in this paper. A multi-substitution tree parity machine (TPM) approach is used here to generate dynamic single digit secret key. The secret key created by the tree parity machine will be different in each phase of execution. This single digit dynamic secret key is used in the proposed encryption and decryption techniques. The complexity and execution time taken by the proposed algorithm is improved comparing to the existing algorithms. The proposed algorithm provides higher reliability and robustness in terms of security because of it dynamic nature.
{"title":"An Artificial Neural Network Technique of Modern Cryptography","authors":"S. Pal, B. Datta, A. Karmakar","doi":"10.3329/jsr.v14i2.55669","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.55669","url":null,"abstract":"An enormous volume of data transmitted through the internet in every second nowadays, so data protection is still a big challenge as communication channels are mostly public. Several approaches are there for protection of data when transmitted through the network channel, cryptography is one of them. Cryptography is a technique to hide original and confidential information from intruder. Considering information security principles i.e. confidentiality, integrity, and availability (CIA-triad) an efficient, portable, dynamic, and simple, artificial neural network (ANN) based cryptography algorithm have been presented in this paper. A multi-substitution tree parity machine (TPM) approach is used here to generate dynamic single digit secret key. The secret key created by the tree parity machine will be different in each phase of execution. This single digit dynamic secret key is used in the proposed encryption and decryption techniques. The complexity and execution time taken by the proposed algorithm is improved comparing to the existing algorithms. The proposed algorithm provides higher reliability and robustness in terms of security because of it dynamic nature.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76451911","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}
G. Dhanya, T. Pranesha, K. Nagaraja, D. Chate, G. Beig
The present study analyses the continuous in-situ observations of surface ozone (O3), carbon monoxide (CO), and nitrogen oxides (NOX) conducted in an urban location, Bengaluru, India, during the year 2019 (January to December). The seasonal concentration of O3 fluctuated with the highest concentrations in the summer (39.6 ppbv) and winter (40.4 ppbv) and the lowest concentrations during the monsoon (16.8 ppbv). The seasonal mixing ratio of CO showed the highest value in post-monsoon (1.71 ppmv) and lowest during monsoon (0.79 ppmv). The seasonal trend of NOX showed highest in winter (56.8 ppbv) and lowest in monsoon (22.5 ppbv). The monthly mixing ratios of O3, CO, and NOX showed distinct variability, which may be attributed to changing anthropogenic activities, planetary boundary layer processes, and local meteorology. O3 was significantly related to temperature but inversely associated with relative humidity and wind speed. The association between CO, NOX with relative humidity, temperature, wind speed showed discrete results. The (dO3/dt) in the morning and evening duration were about 5.0 ppbv/h and -4.1 ppbv/h respectively.
{"title":"Variation of Ozone, Carbon Monoxide, and Oxides of Nitrogen at Bengaluru, India","authors":"G. Dhanya, T. Pranesha, K. Nagaraja, D. Chate, G. Beig","doi":"10.3329/jsr.v14i2.55626","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.55626","url":null,"abstract":"The present study analyses the continuous in-situ observations of surface ozone (O3), carbon monoxide (CO), and nitrogen oxides (NOX) conducted in an urban location, Bengaluru, India, during the year 2019 (January to December). The seasonal concentration of O3 fluctuated with the highest concentrations in the summer (39.6 ppbv) and winter (40.4 ppbv) and the lowest concentrations during the monsoon (16.8 ppbv). The seasonal mixing ratio of CO showed the highest value in post-monsoon (1.71 ppmv) and lowest during monsoon (0.79 ppmv). The seasonal trend of NOX showed highest in winter (56.8 ppbv) and lowest in monsoon (22.5 ppbv). The monthly mixing ratios of O3, CO, and NOX showed distinct variability, which may be attributed to changing anthropogenic activities, planetary boundary layer processes, and local meteorology. O3 was significantly related to temperature but inversely associated with relative humidity and wind speed. The association between CO, NOX with relative humidity, temperature, wind speed showed discrete results. The (dO3/dt) in the morning and evening duration were about 5.0 ppbv/h and -4.1 ppbv/h respectively.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78127830","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}
Bovine Respiratory Disease (BRD) is a prevalent disease in cattle rearing systems globally with significant health and economic costs. Current diagnostic methods of BRD rely on subjective visual signs and physical examination, which are suboptimal. This study, therefore, aims to find a blood-based gene expression signature for the diagnostic identification of BRD in cattle. The Gene Expression Omnibus dataset, GSE152959, was downloaded and used for analysis. The analyses performed included differential gene expression (DGE), clustering and machine learning prediction. Ninety genes were differentially expressed in BRD samples compared to controls. The GSE150706 dataset was used as the test dataset for machine learning prediction. The DEGs identified clustered the GSE150706 samples with good accuracy. For the machine learning prediction, 92 % of correctly predicted samples were obtained using twenty genes as features. Therefore, the identified 20-gene expression signature has BRD diagnostic utility in cattle. This signature could potentially be used to develop standardized and reliable diagnostic tests of Bovine Respiratory Disease in cattle. Improved diagnostics will lead to early detection and treatment, reducing the health and economic costs associated with the disease. Further validation in larger cattle cohorts is required.
{"title":"A 20-Gene Expression Diagnostic Signature of Bovine Respiratory Disease in Cattle","authors":"A. Giwa, R. Giwa","doi":"10.3329/jsr.v14i2.55193","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.55193","url":null,"abstract":"Bovine Respiratory Disease (BRD) is a prevalent disease in cattle rearing systems globally with significant health and economic costs. Current diagnostic methods of BRD rely on subjective visual signs and physical examination, which are suboptimal. This study, therefore, aims to find a blood-based gene expression signature for the diagnostic identification of BRD in cattle. The Gene Expression Omnibus dataset, GSE152959, was downloaded and used for analysis. The analyses performed included differential gene expression (DGE), clustering and machine learning prediction. Ninety genes were differentially expressed in BRD samples compared to controls. The GSE150706 dataset was used as the test dataset for machine learning prediction. The DEGs identified clustered the GSE150706 samples with good accuracy. For the machine learning prediction, 92 % of correctly predicted samples were obtained using twenty genes as features. Therefore, the identified 20-gene expression signature has BRD diagnostic utility in cattle. This signature could potentially be used to develop standardized and reliable diagnostic tests of Bovine Respiratory Disease in cattle. Improved diagnostics will lead to early detection and treatment, reducing the health and economic costs associated with the disease. Further validation in larger cattle cohorts is required.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85690782","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}
Alkoxy group substituted compounds of acetanilide are found to have pharmacological and industrial importance. Synthesis of alkoxy substituted acetanilides via conventional thermal methods involves multi-step processes, formation of side products, and the poor yield of desired products. But, the vast literature studies reveal that electroorganic synthesis of alkoxy substituted acetanilide derivatives would be effectively carried out through electrochemical oxidation methods. The direct substitution of the ethoxy (alkoxy) group onto the aromatic ring, an electrophilic substitution, has not been attempted so far. This concept is taken as a preparatory attempt to find an alternative method to the tedious chemical route and to invent a direct method of introducing the ethoxy groups into the aromatic ring in a single step. A polarization study on acetanilide with ethanol as an electrolyte is carried out on platinum and graphite anodes to find out the oxidation potentials. Electrochemical ethoxylation of acetanilide at the platinum electrode is done by the Potentiostatic method using the oxidation potentials. The products are separated using preparative TLC and purified with suitable solvents. The products are characterized by UV, IR, NMR, and Mass spectra.
{"title":"Electroorganic Synthesis and Characterization of 4-Ethoxy Acetanilide using Platinum and Graphite as Anodes","authors":"S. Antonysakthi, M. Selvakumar, P. Prabha","doi":"10.3329/jsr.v14i2.54735","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.54735","url":null,"abstract":"Alkoxy group substituted compounds of acetanilide are found to have pharmacological and industrial importance. Synthesis of alkoxy substituted acetanilides via conventional thermal methods involves multi-step processes, formation of side products, and the poor yield of desired products. But, the vast literature studies reveal that electroorganic synthesis of alkoxy substituted acetanilide derivatives would be effectively carried out through electrochemical oxidation methods. The direct substitution of the ethoxy (alkoxy) group onto the aromatic ring, an electrophilic substitution, has not been attempted so far. This concept is taken as a preparatory attempt to find an alternative method to the tedious chemical route and to invent a direct method of introducing the ethoxy groups into the aromatic ring in a single step. A polarization study on acetanilide with ethanol as an electrolyte is carried out on platinum and graphite anodes to find out the oxidation potentials. Electrochemical ethoxylation of acetanilide at the platinum electrode is done by the Potentiostatic method using the oxidation potentials. The products are separated using preparative TLC and purified with suitable solvents. The products are characterized by UV, IR, NMR, and Mass spectra.\u0000 ","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77015451","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}
S. Sharma, A. Ojha, S. Chakkaravarthi, B. Bhattacharya
The present study aimed to prepare and characterize eggplant peel extract (EPE) with suitability for application in the food industry. EPE was prepared via ultrasound-assisted extraction method employing ethanol as an extraction solvent, then reconstituted in water. The total phenolic content, anthocyanin content, and antioxidant activity of EPE in an organic and aqueous solvent were determined. In EPE, the major anthocyanin, delphinidin-3-rutinoside, was quantified via LC-MS/MS. The agar well diffusion assay and minimum inhibitory concentration (MIC) determination method were used to analyze the antibacterial activity of EPE against Bacillus cereus, Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium. There was no significant difference (p>0.05) in the total phenolic content, anthocyanin content, and antioxidant activity of EPE when reconstituted in water. The inhibition zones of EPE (at 100 mg/mL concentration) ranged from 15.6 to 21.6 mm, whereas MIC ranged from 2.34 to 4.68 mg/mL against all tested bacteria. The lower values of MIC for B. cereus and S. aureus indicated that EPE was more effective for gram-positive bacterial strains. The water-reconstituted EPE with significant antioxidant and antibacterial activity would have potential food industrial applications, like food packaging, nutraceuticals, and functional foods.
本研究旨在制备并表征适于食品工业应用的茄子皮提取物(EPE)。以乙醇为提取溶剂，采用超声辅助提取法制备EPE，然后在水中重构。测定了EPE在有机溶剂和水溶液中的总酚含量、花青素含量和抗氧化活性。用LC-MS/MS对EPE中主要花青素delphinidin-3-rutinoside进行定量分析。采用琼脂孔扩散法和最低抑菌浓度(MIC)法测定EPE对蜡样芽孢杆菌、金黄色葡萄球菌、大肠杆菌和鼠伤寒沙门菌的抑菌活性。EPE在水中复溶后，总酚含量、花青素含量和抗氧化活性均无显著差异(p>0.05)。EPE (100 mg/mL)的抑菌带范围为15.6 ~ 21.6 mm, MIC范围为2.34 ~ 4.68 mg/mL。蜡样芽孢杆菌和金黄色葡萄球菌的MIC值较低，表明EPE对革兰氏阳性菌株更有效。水重构EPE具有显著的抗氧化和抗菌活性，具有潜在的食品工业应用前景，如食品包装、营养保健品和功能食品。
{"title":"Ultrasonic-Assisted Extraction of Phytochemicals from Eggplant Peel: Physicochemical and Antibacterial Evaluation","authors":"S. Sharma, A. Ojha, S. Chakkaravarthi, B. Bhattacharya","doi":"10.3329/jsr.v14i2.55675","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.55675","url":null,"abstract":"The present study aimed to prepare and characterize eggplant peel extract (EPE) with suitability for application in the food industry. EPE was prepared via ultrasound-assisted extraction method employing ethanol as an extraction solvent, then reconstituted in water. The total phenolic content, anthocyanin content, and antioxidant activity of EPE in an organic and aqueous solvent were determined. In EPE, the major anthocyanin, delphinidin-3-rutinoside, was quantified via LC-MS/MS. The agar well diffusion assay and minimum inhibitory concentration (MIC) determination method were used to analyze the antibacterial activity of EPE against Bacillus cereus, Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium. There was no significant difference (p>0.05) in the total phenolic content, anthocyanin content, and antioxidant activity of EPE when reconstituted in water. The inhibition zones of EPE (at 100 mg/mL concentration) ranged from 15.6 to 21.6 mm, whereas MIC ranged from 2.34 to 4.68 mg/mL against all tested bacteria. The lower values of MIC for B. cereus and S. aureus indicated that EPE was more effective for gram-positive bacterial strains. The water-reconstituted EPE with significant antioxidant and antibacterial activity would have potential food industrial applications, like food packaging, nutraceuticals, and functional foods.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73906937","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}
The present paper deals with the reliability and fault analysis of a stochastic model for two non-identical units, in which the first unit is kept as operative and the other sub-standard one. The sub-standard unit may be repaired or may be replaced by another sub-standard unit on its failure, depending on the cost of repairing/replacement. Failure and repair times are considered correlated using bivariate point exponential distribution. Analysis of a system is done to find various reliability measures, which gives the system's effectiveness. The conclusion about these reliability measures is carried out by graphical studies. The main emphasis is on the correlation between repair time and failure time.
{"title":"Reliability and Fault Analysis of a Stochastic Model of a Standby System with Cost Depended Repair/Replacement of Substandard Unit and Correlated Life Time","authors":"Sarita, P. Bhatia, S. kumar, H. K. Dhingra","doi":"10.3329/jsr.v14i2.57494","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.57494","url":null,"abstract":"The present paper deals with the reliability and fault analysis of a stochastic model for two non-identical units, in which the first unit is kept as operative and the other sub-standard one. The sub-standard unit may be repaired or may be replaced by another sub-standard unit on its failure, depending on the cost of repairing/replacement. Failure and repair times are considered correlated using bivariate point exponential distribution. Analysis of a system is done to find various reliability measures, which gives the system's effectiveness. The conclusion about these reliability measures is carried out by graphical studies. The main emphasis is on the correlation between repair time and failure time.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88370102","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}
M. Sivasubramanian, R. Saravanan, R. Mendoza–Meroñob
Synthesis, X-ray crystallography, spectral analysis, and molecular docking analysis on (E)–2–(1–(4–fluorophenyl) ethylidene) hydrazine carbothioamide (EFEHC) are performed. Thiosemicarbazones are a class of small molecules used as anticancer therapeutics. The FT–IR and FT-Raman spectra of EFEHC have been recorded in 4000–400 and 4000–100 cm–1, respectively. The present communication deals with the quantum chemical calculations of energies, geometrical structure, and vibrational wavenumbers of EFEHC using the density functional (DFT/B3LYP) method with 6–31G (d, p) basis set. The conformational analysis gives the energy values based on the change in the position of atoms in the EFEHC molecule. Hirshfeld surface analysis (HSs) is used to discuss the evaluation of intermolecular interactions. Molecular docking analysis of the small molecule EFEHC with macromolecule HMG–CoA protein showed that this is a good molecule and is suitable for anti-cholesterol targets.
{"title":"Synthesis, X-ray Crystallography, Hirshfeld Surface Analysis, Spectral Analysis, and Molecular Docking Studies on (E)–2–(1–(4–Fluorophenyl)Ethylidene) Hydrazine Carbothioamide","authors":"M. Sivasubramanian, R. Saravanan, R. Mendoza–Meroñob","doi":"10.3329/jsr.v14i2.57111","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.57111","url":null,"abstract":"Synthesis, X-ray crystallography, spectral analysis, and molecular docking analysis on (E)–2–(1–(4–fluorophenyl) ethylidene) hydrazine carbothioamide (EFEHC) are performed. Thiosemicarbazones are a class of small molecules used as anticancer therapeutics. The FT–IR and FT-Raman spectra of EFEHC have been recorded in 4000–400 and 4000–100 cm–1, respectively. The present communication deals with the quantum chemical calculations of energies, geometrical structure, and vibrational wavenumbers of EFEHC using the density functional (DFT/B3LYP) method with 6–31G (d, p) basis set. The conformational analysis gives the energy values based on the change in the position of atoms in the EFEHC molecule. Hirshfeld surface analysis (HSs) is used to discuss the evaluation of intermolecular interactions. Molecular docking analysis of the small molecule EFEHC with macromolecule HMG–CoA protein showed that this is a good molecule and is suitable for anti-cholesterol targets.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83853572","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}
The different acid doped polyaniline (PANI) materials were prepared in situ using mineral acids like HCl, H2SO4, HNO3 and HClO4 of different concentrations in presence of 0.2 M aniline solution and 0.25 M ammonium persulfate as oxidising agent by the chemical oxidation method. The synthesized materials were studied for their physico-chemical characterizations like XRD, IR and SEM. IR studies revealed the formation of emeraldine salt in all the acid doped PANI samples. XRD of samples exhibited the partly crystalline structure of which HClO4 doped showed good crystallinity over other samples. SEM images displayed the formation of nanorods like structural agglomerates. The effect of acid dopants on their electrical conductivity was investigated by using the four probe set up technique. It was found that HClO4 doped PANI exhibited good electrical conductivity over the other acid doped samples whereas the lowest electrical conductivity was recorded for HNO3 doped PANI samples. The electrical conductivity of 1 M HClO4 doped PANI was the highest i.e. 9.1 S cm-1 among all PANI samples.
以不同浓度的HCl、H2SO4、HNO3和HClO4等无机酸为原料，以0.2 M苯胺溶液和0.25 M过硫酸铵为氧化剂，采用化学氧化法原位制备了不同酸掺杂聚苯胺(PANI)材料。对合成材料进行了XRD、IR、SEM等理化表征。红外光谱研究表明，在所有酸掺杂聚苯胺样品中都形成了翡翠盐。样品的XRD分析显示，掺杂HClO4的样品具有较好的结晶性。扫描电镜图像显示纳米棒状结构团块的形成。采用四探针设置技术研究了酸掺杂对其电导率的影响。结果表明，HClO4掺杂的聚苯胺具有较好的电导率，而HNO3掺杂的聚苯胺电导率最低。1 M HClO4掺杂聚苯胺的电导率最高，为9.1 S cm-1。
{"title":"Study of Different Acid Doped Polyaniline Nanostructures and Their Electrical Conductance Properties","authors":"R. Kamble, T. Patil, R. P. Patil","doi":"10.3329/jsr.v14i2.56647","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.56647","url":null,"abstract":"The different acid doped polyaniline (PANI) materials were prepared in situ using mineral acids like HCl, H2SO4, HNO3 and HClO4 of different concentrations in presence of 0.2 M aniline solution and 0.25 M ammonium persulfate as oxidising agent by the chemical oxidation method. The synthesized materials were studied for their physico-chemical characterizations like XRD, IR and SEM. IR studies revealed the formation of emeraldine salt in all the acid doped PANI samples. XRD of samples exhibited the partly crystalline structure of which HClO4 doped showed good crystallinity over other samples. SEM images displayed the formation of nanorods like structural agglomerates. The effect of acid dopants on their electrical conductivity was investigated by using the four probe set up technique. It was found that HClO4 doped PANI exhibited good electrical conductivity over the other acid doped samples whereas the lowest electrical conductivity was recorded for HNO3 doped PANI samples. The electrical conductivity of 1 M HClO4 doped PANI was the highest i.e. 9.1 S cm-1 among all PANI samples.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79882015","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}
The presence of microglial cells as resident macrophage population in the Central Nervous System (CNS) is well documented from the study of repairing of lesions in CNS that varies widely throughout the animal kingdom. The existence of neuroglia cells similar to vertebrate microglia and small mobile phagocytes and hemocytes were documented from ganglia of some invertebrate animal models like leech (H. medicinalis), insects (P. americana and D. melanogaster) and mollusca (M. edulis). Neuronal replacement and migration of immunocompetent cells (macrophage, microglia, ependymal cells etc.) after surgical lesions in CNS of non-mammals (fishes, reptiles and aves) are much restricted to specific neurogenic niches associated to the neural regeneration and migration of cells in invertebrates. Microglial presence is largely restricted in the optic tract of fish and amphibian ganglionic cells because they have a surprising capacity to regenerate their neurons after lesions. Hence the CNS of both invertebrates and vertebrates contain microglia like mononuclear phagocytes, ensheathing glia and reticular glia, which indicate about the evolutionary conserved innate immune response to maintain CNS development and health. But the presence and gradual changes in the structure and function of microglia and neuron-microglia relationship in the CNS along the phylogeny need to be focused thoroughly.
{"title":"Microglia, the Sentinel of Brain in the Evolution of Nervous System from Invertebrate to Vertebrate: A Short Review","authors":"S. Sardar, N. Saha, A. Ghosh","doi":"10.3329/jsr.v14i2.56222","DOIUrl":"https://doi.org/10.3329/jsr.v14i2.56222","url":null,"abstract":"The presence of microglial cells as resident macrophage population in the Central Nervous System (CNS) is well documented from the study of repairing of lesions in CNS that varies widely throughout the animal kingdom. The existence of neuroglia cells similar to vertebrate microglia and small mobile phagocytes and hemocytes were documented from ganglia of some invertebrate animal models like leech (H. medicinalis), insects (P. americana and D. melanogaster) and mollusca (M. edulis). Neuronal replacement and migration of immunocompetent cells (macrophage, microglia, ependymal cells etc.) after surgical lesions in CNS of non-mammals (fishes, reptiles and aves) are much restricted to specific neurogenic niches associated to the neural regeneration and migration of cells in invertebrates. Microglial presence is largely restricted in the optic tract of fish and amphibian ganglionic cells because they have a surprising capacity to regenerate their neurons after lesions. Hence the CNS of both invertebrates and vertebrates contain microglia like mononuclear phagocytes, ensheathing glia and reticular glia, which indicate about the evolutionary conserved innate immune response to maintain CNS development and health. But the presence and gradual changes in the structure and function of microglia and neuron-microglia relationship in the CNS along the phylogeny need to be focused thoroughly.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89761475","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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