Pub Date : 2021-07-01DOI: 10.15251/jobm.2021.133.89
M. Rani, K. Tariq, A. Younus, K. Batool, M. Sattar, R. Shafique, M. Bukhari, N. Akhtar, A. Mehmood
In the present work sodium chromite (NaCr2O4) based pigment was synthesized using sol gel technique. From XRD analysis, it is clear that all samples manufactured by sol gel technique have spinel structure crystallization. Also chromites with a chromium concentration (max) shows black color and Na- substituted shows green color. The samples were annealed at different temperature from 600˚C to 700˚C. The obtained nano particles were characterized by other different techniques as well such as Scanning electron microscopy, Raman spectroscopy, Photoluminence and Energy dispersive spectroscopy. The particle size of parent compound is ranging from 4.4nm to 11nm determined from SEM. The tendency of particles to form the aggregates with the increasing annealing temperature has been observed. The optical characterization of the compound shows that the sol gel attained material is strongly persuasive sodium chromite.
{"title":"Sol-gel Synthesis of Nanoscaled Spinels using 1, 2-ethanediol as a Gelation Agent","authors":"M. Rani, K. Tariq, A. Younus, K. Batool, M. Sattar, R. Shafique, M. Bukhari, N. Akhtar, A. Mehmood","doi":"10.15251/jobm.2021.133.89","DOIUrl":"https://doi.org/10.15251/jobm.2021.133.89","url":null,"abstract":"In the present work sodium chromite (NaCr2O4) based pigment was synthesized using sol gel technique. From XRD analysis, it is clear that all samples manufactured by sol gel technique have spinel structure crystallization. Also chromites with a chromium concentration (max) shows black color and Na- substituted shows green color. The samples were annealed at different temperature from 600˚C to 700˚C. The obtained nano particles were characterized by other different techniques as well such as Scanning electron microscopy, Raman spectroscopy, Photoluminence and Energy dispersive spectroscopy. The particle size of parent compound is ranging from 4.4nm to 11nm determined from SEM. The tendency of particles to form the aggregates with the increasing annealing temperature has been observed. The optical characterization of the compound shows that the sol gel attained material is strongly persuasive sodium chromite.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44458215","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 : 2021-07-01DOI: 10.15251/jobm.2021.133.119
M. I. Din, S. Rehman, Z. Hussain, A. Intisar, E. Ahmed, A. Sharif, T. Hussain, R. Khalid, S. Ameen, M. Arshad
This study covers the slow catalytic pyrolysis of Calotropis procera (Akh plant root) using biogenically synthesized NiO NPs. The synthesized particles were characterized by UV-Visible and FTIR spectrometry. Catalytic activity of the NiO NPs was examined via slow catalytic pyrolysis of Akh plant roots by monitoring temperature and catalyst effect on feedstock for the production of high yield bio-char, bio-oil and bio-gases. At 250°C low bio-oil and higher bio-char yield were obtained. However, at higher temperature inverse results were obtained whereby at optimum temperature of 300°C, the yield of bio-char, bio-oil and biogas 37, 36 and 27% was attained
{"title":"Eco friendly synthesis of nickel oxide nanoparticles and its application on pyrolysis of Calotropis procera (AKH) Plant roots","authors":"M. I. Din, S. Rehman, Z. Hussain, A. Intisar, E. Ahmed, A. Sharif, T. Hussain, R. Khalid, S. Ameen, M. Arshad","doi":"10.15251/jobm.2021.133.119","DOIUrl":"https://doi.org/10.15251/jobm.2021.133.119","url":null,"abstract":"This study covers the slow catalytic pyrolysis of Calotropis procera (Akh plant root) using biogenically synthesized NiO NPs. The synthesized particles were characterized by UV-Visible and FTIR spectrometry. Catalytic activity of the NiO NPs was examined via slow catalytic pyrolysis of Akh plant roots by monitoring temperature and catalyst effect on feedstock for the production of high yield bio-char, bio-oil and bio-gases. At 250°C low bio-oil and higher bio-char yield were obtained. However, at higher temperature inverse results were obtained whereby at optimum temperature of 300°C, the yield of bio-char, bio-oil and biogas 37, 36 and 27% was attained","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41805241","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 : 2021-07-01DOI: 10.15251/jobm.2021.133.127
A. Al-Bagawi, D. Mansour, S. Aljabri
The suitability of agricultural soil and irrigation water depends on the presence of trace metals; the aim of the present work is to assessment of the trace metals at Hail region using analytical techniques. The metal contaminations levels were determined using ICP-MS and flame photometer. The result obtained were compared to the standard samples suitable for agricultural and it was in the suitable range. The geo-accumulation (I-geo), single pollution, Nemerow pollution indices showed that the Se pollution intensity was significant for agricultural soils. I-geo values revealed no real sign of contamination with almost all the samples, reflecting a lack of contamination for all elements except Zn. While the enrichment factor (EF) for Fe was less than 2 suggested that the elements come entirely from crustal materials or natural processes. The study showed considerable variation in the levels of the analyzed elements in the soil samples. The total metal concentrations in the soil samples ordered as follows: Na > K > Fe > Mn > Zn > Ba > Cr > Ni > Cu > Pb > Cd > As.
农业土壤和灌溉水的适宜性取决于微量金属的存在;本文的目的是利用分析技术对冰雹地区的痕量金属进行评价。采用ICP-MS和火焰光度计测定金属污染水平。所得结果与农用标准样品进行了比较，均在适宜范围内。土壤累积指数(I-geo)、单一污染指数、Nemerow污染指数表明，土壤硒污染强度显著。几乎所有样品的I-geo值都没有显示出污染的迹象，这反映了除Zn外所有元素都没有受到污染。而铁元素的富集因子(EF)小于2，表明铁元素完全来自地壳物质或自然过程。研究表明，土壤样品中所分析元素的含量存在相当大的差异。土壤样品中金属的总浓度依次为:Na > K > Fe > Mn > Zn > Ba > Cr > Ni > Cu > Pb > Cd > as。
{"title":"Contaminations assessment of some trace metals in agricultural soil and irrigation water analysis at Hail region Saudi Arabia","authors":"A. Al-Bagawi, D. Mansour, S. Aljabri","doi":"10.15251/jobm.2021.133.127","DOIUrl":"https://doi.org/10.15251/jobm.2021.133.127","url":null,"abstract":"The suitability of agricultural soil and irrigation water depends on the presence of trace metals; the aim of the present work is to assessment of the trace metals at Hail region using analytical techniques. The metal contaminations levels were determined using ICP-MS and flame photometer. The result obtained were compared to the standard samples suitable for agricultural and it was in the suitable range. The geo-accumulation (I-geo), single pollution, Nemerow pollution indices showed that the Se pollution intensity was significant for agricultural soils. I-geo values revealed no real sign of contamination with almost all the samples, reflecting a lack of contamination for all elements except Zn. While the enrichment factor (EF) for Fe was less than 2 suggested that the elements come entirely from crustal materials or natural processes. The study showed considerable variation in the levels of the analyzed elements in the soil samples. The total metal concentrations in the soil samples ordered as follows: Na > K > Fe > Mn > Zn > Ba > Cr > Ni > Cu > Pb > Cd > As.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48956794","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 : 2021-06-09DOI: 10.21203/rs.3.rs-577935/v1
Fowziya Shaik Ali S.A, F. A. Marzouqi, M. Ragamathunnisa, M. IsmailFathima, A. Jahangir, A. Ayeshamariam, K. Kaviyarasu
Nanoparticles of bismuth oxide were successfully synthesized by hydrothermal process which included Bismuth (III) nitrate (Bi(NO3)3.6H2O), sodium hydroxide(NaOH) and Nitric acid(HNO3) without further purification along with ultra-pure water. To investigate the structural, optical, and photocatalytic activity of two samples (1:5) and (1:6) respectively with two different NaOH precipitating agent molar ratios. The prepared nanoparticles were characterized by X-ray diffraction (XRD), UV-Vis’s spectrometer, scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDAX), Fourier transform infrared spectroscopy (FTIR) and X-ray Photo electron Spectroscopy (XPS). Based on the obtained results the hydrothermally synthesized Bi2O3 NPs exhibit good efficiency to photocatalytic degradation of Methylene blue under the irradiation of LED white light.
{"title":"Synthesis and Characterization of Bi2O3 NPS and Photocatalytic Application with Methylene Blue","authors":"Fowziya Shaik Ali S.A, F. A. Marzouqi, M. Ragamathunnisa, M. IsmailFathima, A. Jahangir, A. Ayeshamariam, K. Kaviyarasu","doi":"10.21203/rs.3.rs-577935/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-577935/v1","url":null,"abstract":"\u0000 Nanoparticles of bismuth oxide were successfully synthesized by hydrothermal process which included Bismuth (III) nitrate (Bi(NO3)3.6H2O), sodium hydroxide(NaOH) and Nitric acid(HNO3) without further purification along with ultra-pure water. To investigate the structural, optical, and photocatalytic activity of two samples (1:5) and (1:6) respectively with two different NaOH precipitating agent molar ratios. The prepared nanoparticles were characterized by X-ray diffraction (XRD), UV-Vis’s spectrometer, scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDAX), Fourier transform infrared spectroscopy (FTIR) and X-ray Photo electron Spectroscopy (XPS). Based on the obtained results the hydrothermally synthesized Bi2O3 NPs exhibit good efficiency to photocatalytic degradation of Methylene blue under the irradiation of LED white light.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48561001","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.57
F. K. Algethami, M. R. Elamin, B. Abdulkhair
The spread of organic pollutants in water is encountering colossal problems worldwide, and it gets worst as the industry progresses. Among the suggested solutions, heterogenous photocatalysis was progressively applied to degrade organic pollutants. Herein, a simple ethylene glycol refluxing (EGR) method was optimized to fabricate bismuth oxyiodide (BiOI) nanoparticles with a percentage yield of 94.2%. The EGR method's success in preparing BiOI nanomaterial was confirmed by the results of X-ray diffraction, energy dispersive spectroscopy, and Fourier-transform-infrared spectroscopy. The scanning-electron-microscopy and the transmission electron microscopy analysis revealed that the sunshine-like nanosheets are composed of tiny nanoparticles. The BiOI was employed for photocatalytic degradation of organic pollutants under visible light. The adsorption capability of BiOI was investigated prior to its photocatalytic activity, and both investigations showed appealing results. The outcomes of this study nominated both the EGR method for fast preparation of a nanoscale BiOI and the applicability of BiOI as a photocatalyst to swap the organic pollutants from contaminated water using the free-inexhaustible sunlight.
{"title":"Simple preparation of a sunshine -like bismuth oxyiodide nanosheets for photocatalytic degradation of organic pollutant under sunlight","authors":"F. K. Algethami, M. R. Elamin, B. Abdulkhair","doi":"10.15251/jobm.2021.132.57","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.57","url":null,"abstract":"The spread of organic pollutants in water is encountering colossal problems worldwide, and it gets worst as the industry progresses. Among the suggested solutions, heterogenous photocatalysis was progressively applied to degrade organic pollutants. Herein, a simple ethylene glycol refluxing (EGR) method was optimized to fabricate bismuth oxyiodide (BiOI) nanoparticles with a percentage yield of 94.2%. The EGR method's success in preparing BiOI nanomaterial was confirmed by the results of X-ray diffraction, energy dispersive spectroscopy, and Fourier-transform-infrared spectroscopy. The scanning-electron-microscopy and the transmission electron microscopy analysis revealed that the sunshine-like nanosheets are composed of tiny nanoparticles. The BiOI was employed for photocatalytic degradation of organic pollutants under visible light. The adsorption capability of BiOI was investigated prior to its photocatalytic activity, and both investigations showed appealing results. The outcomes of this study nominated both the EGR method for fast preparation of a nanoscale BiOI and the applicability of BiOI as a photocatalyst to swap the organic pollutants from contaminated water using the free-inexhaustible sunlight.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45898091","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.45
R. A. Abdel Hameed, A. M. Al-bonayan
The accumulation of the expired vitamin B6 drugs is hazards for both our child’s and environment, the present research aimed to reuse the expired water soluble drug in its pharmaceutical form as potential non-toxic corrosion inhibitor for steel alloys used in manufacturer of the petroleum pipe lines in 1.0 M HCl. Atomic absorption spectroscopy(AAS) and electrochemical techniques were used to evaluate the corrosion inhibition efficiency, effect of concentrations and temperature were studied, the data show that the inhibition efficiency was increased with concentrations and decreased with temperature. Potentiodynamic polarization data show that the expired vitamin B6 retard both anodic and cathodic potential meaning it is a mixed inhibitor. The electrochemical impedance spectroscopy EIS, techniques data shows that the expired drug help to increases the polarization resistance by adsorbing on metal/electrolyte interface. This kind of adsorption found to obeying Langmuir adsorption isotherm model. The data obtained from the used techniques exhibit good agreement between them with (± 1) to prove that the used expired vitaminB6 medicinal drugs act as eco-friendly corrosion inhibitor for the steel in acidic environment in its pharmaceutical from
{"title":"Recycling of Some Water Soluble Drugs for Corrosion Inhibition of Steel Materials: Analytical and Electrochemical Measurements","authors":"R. A. Abdel Hameed, A. M. Al-bonayan","doi":"10.15251/jobm.2021.132.45","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.45","url":null,"abstract":"The accumulation of the expired vitamin B6 drugs is hazards for both our child’s and environment, the present research aimed to reuse the expired water soluble drug in its pharmaceutical form as potential non-toxic corrosion inhibitor for steel alloys used in manufacturer of the petroleum pipe lines in 1.0 M HCl. Atomic absorption spectroscopy(AAS) and electrochemical techniques were used to evaluate the corrosion inhibition efficiency, effect of concentrations and temperature were studied, the data show that the inhibition efficiency was increased with concentrations and decreased with temperature. Potentiodynamic polarization data show that the expired vitamin B6 retard both anodic and cathodic potential meaning it is a mixed inhibitor. The electrochemical impedance spectroscopy EIS, techniques data shows that the expired drug help to increases the polarization resistance by adsorbing on metal/electrolyte interface. This kind of adsorption found to obeying Langmuir adsorption isotherm model. The data obtained from the used techniques exhibit good agreement between them with (± 1) to prove that the used expired vitaminB6 medicinal drugs act as eco-friendly corrosion inhibitor for the steel in acidic environment in its pharmaceutical from","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44164807","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.23
N. V. Krishna Prasad, T. A. Babu, S. Phanidhar, R. Singampalli, B. R. Naik, M. Sarma, S. Ramesh
This paper reviewed some of the applications of metamaterials in antenna design, cloaking devices, sensors and solar cells in brief. Metamaterials can be used as environment or as part of the antenna. Based on the required parameters, metamaterials while designing antennas are used in various types. They are highly useful in enhancing the power gain, bandwidth, in creating dense and antennas of multiple frequencies. Usage of metamaterial in antenna require proper designing of unit cell. This require creation of cells with special properties at required frequency. Cloaking is a technique of making specific objects invisible. This was achieved by isolating electromagnetic waves in that region. This paper reviewed some of the cloaking devices that use the technique of coordinate transformation and scattering cancellation. Metamaterial sensors which are more efficient than sensors with traditional materials are reviewed. These sensors exhibit enhanced sensitivity. Sensors used in wave guides and liquid chemical detection were reviewed. Solar cells that use metamaterials were reviewed. Usage of these materials reduce the loss in solar radiation making the solar cell more efficient based on the design. Recent design in solar cells concentrate on obtaining maximum reflection through usage of back reflectors and increased absorption
{"title":"POTENTIAL APPLICATIONS OF METAMATERIALS IN ANTENNA DESIGN, CLOAKING DEVICES, SENSORS AND SOLAR CELLS: A COMPREHENSIVE REVIEW","authors":"N. V. Krishna Prasad, T. A. Babu, S. Phanidhar, R. Singampalli, B. R. Naik, M. Sarma, S. Ramesh","doi":"10.15251/jobm.2021.132.23","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.23","url":null,"abstract":"This paper reviewed some of the applications of metamaterials in antenna design, cloaking devices, sensors and solar cells in brief. Metamaterials can be used as environment or as part of the antenna. Based on the required parameters, metamaterials while designing antennas are used in various types. They are highly useful in enhancing the power gain, bandwidth, in creating dense and antennas of multiple frequencies. Usage of metamaterial in antenna require proper designing of unit cell. This require creation of cells with special properties at required frequency. Cloaking is a technique of making specific objects invisible. This was achieved by isolating electromagnetic waves in that region. This paper reviewed some of the cloaking devices that use the technique of coordinate transformation and scattering cancellation. Metamaterial sensors which are more efficient than sensors with traditional materials are reviewed. These sensors exhibit enhanced sensitivity. Sensors used in wave guides and liquid chemical detection were reviewed. Solar cells that use metamaterials were reviewed. Usage of these materials reduce the loss in solar radiation making the solar cell more efficient based on the design. Recent design in solar cells concentrate on obtaining maximum reflection through usage of back reflectors and increased absorption","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42907571","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.77
N. Charanya Meenu, S. Lakshmi Manokari, T. S. Senthil
Wrightia tinctoria was one of the medicinal plants that contains enormous amount of phytoconstituents with diverse functions and the plant was said to be the safer drug widely used in treating various ailments. In this present work, silver nanoparticles were synthesized using different solvents (benzene, ethanol and aqueous) of Wrightia tinctoria leaves. The prepared nanoparticles are characterized by UV- Vis spectroscopy, FTIR, XRD, FESEM and HRTEM analysis. Biosynthesized silver nanoparticles of ethanol extract showed strong antibacterial activity compared to the nanoparticles synthesized from other extracts against Staphylococcus aureus and Enterococcus faecalis (gram-positive) and Escherichia coli and Klebsiella pneumoniae(gram-negative) bacterial strains by well diffusion method. In this investigation, the selected plant extract and silver nanoparticle were coated on viscose spunlacednonwoven fabrics and subjected to qualitative and quantitative antibacterial studies.
{"title":"Plant-mediated green synthesis, characterization and antibacterial efficacy of Ag-NPS using extracts of Wrightia tinctoria leaves for biological application","authors":"N. Charanya Meenu, S. Lakshmi Manokari, T. S. Senthil","doi":"10.15251/jobm.2021.132.77","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.77","url":null,"abstract":"Wrightia tinctoria was one of the medicinal plants that contains enormous amount of phytoconstituents with diverse functions and the plant was said to be the safer drug widely used in treating various ailments. In this present work, silver nanoparticles were synthesized using different solvents (benzene, ethanol and aqueous) of Wrightia tinctoria leaves. The prepared nanoparticles are characterized by UV- Vis spectroscopy, FTIR, XRD, FESEM and HRTEM analysis. Biosynthesized silver nanoparticles of ethanol extract showed strong antibacterial activity compared to the nanoparticles synthesized from other extracts against Staphylococcus aureus and Enterococcus faecalis (gram-positive) and Escherichia coli and Klebsiella pneumoniae(gram-negative) bacterial strains by well diffusion method. In this investigation, the selected plant extract and silver nanoparticle were coated on viscose spunlacednonwoven fabrics and subjected to qualitative and quantitative antibacterial studies.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49195058","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.67
D. Velmurugan, T. Pridhar, T. Yuvaraj, R. Srinivasan, B. Suresh Babu
The success of dental implants is influenced by several biomechanical factors such as implant design, bone quality, length of the implant, and the load transferred to the implant. The present studyaimsto determine the effects of bone quality, implant length, and bone type on stress/strain distribution in bone and implant for a zirconia implant. The study was performed using the three dimensional finite element analysis and four different lengths, two types of implants, and four different bone qualities. The Elastic modulus of a cancellous bone was varied to represent the four different bone qualities. A load of 100 N was applied at the center of the abutment. The result of this current work shows that a bone is subjected to the maximum equivalent stress and strain when the cancellous bone density decreased. The screw type implant induced lesser strain than the cylinder type load. The study also confirms that longer implants produced lesser stain than shorter implants, and type I, and II bones induced lesser stresses than type III, and IV bones. The importance of bone quality has been confirmed from this study, and zirconia dental implants have induced lesser stresses.
{"title":"Studying the biomechanical effects of zirconia implant geometry and bone quality on the bone-implant interface using finite element analysis","authors":"D. Velmurugan, T. Pridhar, T. Yuvaraj, R. Srinivasan, B. Suresh Babu","doi":"10.15251/jobm.2021.132.67","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.67","url":null,"abstract":"The success of dental implants is influenced by several biomechanical factors such as implant design, bone quality, length of the implant, and the load transferred to the implant. The present studyaimsto determine the effects of bone quality, implant length, and bone type on stress/strain distribution in bone and implant for a zirconia implant. The study was performed using the three dimensional finite element analysis and four different lengths, two types of implants, and four different bone qualities. The Elastic modulus of a cancellous bone was varied to represent the four different bone qualities. A load of 100 N was applied at the center of the abutment. The result of this current work shows that a bone is subjected to the maximum equivalent stress and strain when the cancellous bone density decreased. The screw type implant induced lesser strain than the cylinder type load. The study also confirms that longer implants produced lesser stain than shorter implants, and type I, and II bones induced lesser stresses than type III, and IV bones. The importance of bone quality has been confirmed from this study, and zirconia dental implants have induced lesser stresses.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184692","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 : 2021-04-01DOI: 10.15251/jobm.2021.132.33
S. Vandaarkuzhali, J. F. Xavier, R. Ramadoss, V. Jayaseelan, K. Sudhakar
Nanofluids are possible heat transfer fluids with enhanced thermophysical characteristics and heat transfer performance for improved performance in many devices. The thermal behaviour of air conditioning systems using various nano-fluids is described in this study. The nano-fluid chosen for testing is CuO, ZnO and Al2O3, which are combined with the R22 refrigerants with a volume fraction of 0.1 %, 0.3 % and 0.5 % to analyse the airconditioning Performance. The magnetic stirrer is used to disperse nano-particles and ultrasound for approximately 4 hours, dispersing the specified quantity into compressed oil for 2 hours to the appropriate fraction. The model uses the fluid input information to predict fluid output temperatures, operating pressures, compressor power consumption and overall system output. The experimental results show an increase in performance by using 0.5 percent volume with R22base refrigerant when using CuO
{"title":"Energy performance of R22 blended with nanofluids in refrigeration system","authors":"S. Vandaarkuzhali, J. F. Xavier, R. Ramadoss, V. Jayaseelan, K. Sudhakar","doi":"10.15251/jobm.2021.132.33","DOIUrl":"https://doi.org/10.15251/jobm.2021.132.33","url":null,"abstract":"Nanofluids are possible heat transfer fluids with enhanced thermophysical characteristics and heat transfer performance for improved performance in many devices. The thermal behaviour of air conditioning systems using various nano-fluids is described in this study. The nano-fluid chosen for testing is CuO, ZnO and Al2O3, which are combined with the R22 refrigerants with a volume fraction of 0.1 %, 0.3 % and 0.5 % to analyse the airconditioning Performance. The magnetic stirrer is used to disperse nano-particles and ultrasound for approximately 4 hours, dispersing the specified quantity into compressed oil for 2 hours to the appropriate fraction. The model uses the fluid input information to predict fluid output temperatures, operating pressures, compressor power consumption and overall system output. The experimental results show an increase in performance by using 0.5 percent volume with R22base refrigerant when using CuO","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42607154","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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