Journal of Optoelectronic and Biomedical Materials最新文献

Antifungal and visible light driven photocatalytic degradation of Brilliant green dye by Ceria–Zirconia Nanocomposites 氧化铈-氧化锆纳米复合材料对亮绿染料的抗真菌和可见光光催化降解作用

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-06-06 DOI: 10.15251/jobm.2024.162.99

R. Tamilselvi, A. Thirumoorthi

{"title":"Antifungal and visible light driven photocatalytic degradation of Brilliant green dye by Ceria–Zirconia Nanocomposites","authors":"R. Tamilselvi, A. Thirumoorthi","doi":"10.15251/jobm.2024.162.99","DOIUrl":"https://doi.org/10.15251/jobm.2024.162.99","url":null,"abstract":"Green synthesis is a simple, eco-friendly and emerging approach of synthesizing CeriaZirconia nanocomposites (CZ NCs) and evaluates its performance for the photocatalytic treatment of industrial waste water. Ceria-Zirconia NCs were synthesized using leaf extracts of Jatropha gossypiifolia L. for the application towards photocatalytic degradation of Brilliant Green (BG) dye under visible light irradiation. The Ceria-Zirconia NCs were characterized by Fourier Transform Infrared (FT-IR) spectrometer, UV-Visible spectrophotometer, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDX). FT-IR spectra indicate the presence of amino, carboxyl and hydroxyl functional groups on the crystal surface of the nanocomposites. In UV-Visible spectra, the nanocomposites exhibit the highest absorbance at about 252 and 340 nm. From XRD, the average crystallite size of the CeriaZirconia NCs were found to be 80.36nm, while SEM images showed the spherical clusters of agglomerated nanocomposites. The elemental composition and the purity of the nanocomposites were confirmed by Energy Dispersive X-ray Spectroscopy. The superior antifungal activity was investigated against with the fungal strains Candida albicans, Aspergillus niger and penicillium.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377968","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}

引用次数: 0

Wearable flexible Kapton-graphene electromagnetic sensors 可穿戴柔性卡普顿石墨烯电磁传感器

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-05-13 DOI: 10.15251/jobm.2024.162.89

M. Bouherour, A. Nabila, L. Z. Meryem, T. Nourelhouda, R. Sawsen

引用次数: 0

De novo fabrication of oral insulin-loaded chitosan/dextrin/pectin nanospheres and their antidiabetic efficacy in streptozotocin-induced diabetic rats 壳聚糖/糊精/pectin纳米球的全新口服胰岛素载体制备及其在链脲佐菌素诱导的糖尿病大鼠中的抗糖尿病疗效

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-05-13 DOI: 10.15251/jobm.2024.162.73

S. R. Mohammed, A. Abdel-Moneim, E. S. Abdel-Reheim, H. Ramadan, Z. E. Eldin, A. El-Shahawy, A. I. Yousef

{"title":"De novo fabrication of oral insulin-loaded chitosan/dextrin/pectin nanospheres and their antidiabetic efficacy in streptozotocin-induced diabetic rats","authors":"S. R. Mohammed, A. Abdel-Moneim, E. S. Abdel-Reheim, H. Ramadan, Z. E. Eldin, A. El-Shahawy, A. I. Yousef","doi":"10.15251/jobm.2024.162.73","DOIUrl":"https://doi.org/10.15251/jobm.2024.162.73","url":null,"abstract":"Nanotechnology can offer various non-invasive and efficient alternative delivery strategies for insulin injections to enhance the quality of life of diabetic patients. The current research was aimed to fabricate a de novo oral formula of insulin-loaded chitosan nanoparticles coated with dextrin and pectin (INS-CN/DP) to improve the bioavailability and therapeutic efficiency of oral insulin. INS-CN/DP nano-formula was prepared using ionic gelation technique and characterized by XRD, FTIR, SEM, EDX, and DLS. Insulin loading capacity and entrapment efficiency (LC%, EE%), release profile, and kinetic study was conducted for INS-CN/DP nano-formula. Next, hypoglycemic and antidiabetic efficiency of INS-CN/DP nano-formula were studied in streptozotocin-induced diabetic rats by measuring fasting and postprandial glucose, the activities of carbohydrate metabolizing enzymes, liver glycogen content, and gene expression levels of glucokinase and Glucose transporter-2. Characterization results confirmed the formation of INSCN/DP nanoparticles with LC% =26.2 ± 0.56 and EE% 69.3 ± 2.75, respectively. Size average was 282.8 nm and nearly 25% of loaded insulin released after 4 hrs vs 48% for unloaded insulin. In vivo results displayed that oral administration of INS-CN/DP nanoparticles showed highly significant hypoglycemic and antidiabetic efficacy in diabetic rats compared to unloaded oral insulin. Oral INS-CN/DP nano-formula is promising alternative for insulin injections and can be suggested as non-invasive and effective diabetes therapy","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982365","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}

引用次数: 0

Biogenic selenium nanoparticles: their dual impact on spleen and growth in arthritic mice 生物硒纳米颗粒：对关节炎小鼠脾脏和生长的双重影响

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-03-01 DOI: 10.15251/jobm.2024.161.47

N. Qamar, P. John

引用次数: 0

Investigation of optical and dispersion parameters poly vinyl alcohol doped Safranin O dye (PVA/SO) thin film 聚乙烯醇掺杂 Safranin O 染料（PVA/SO）薄膜的光学和分散参数研究

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-03-01 DOI: 10.15251/jobm.2024.161.35

F. Bahrani, I. K. Jasim, A. Q. Abdullah

{"title":"Investigation of optical and dispersion parameters poly vinyl alcohol doped Safranin O dye (PVA/SO) thin film","authors":"F. Bahrani, I. K. Jasim, A. Q. Abdullah","doi":"10.15251/jobm.2024.161.35","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.35","url":null,"abstract":"Optical characteristics of polyvinyl alcohol/Safranin O dye (PVA/SO) thin films prepared by casting technique have been examined. Compositions and crystalline features of PVA/SO thin films are investigated with X-Ray Diffraction analyses. Ultraviolet–Visible spectroscopy has been utilized to measure the absorption and transmission optical properties of the thin films through the wavelength range 300-900 nm. Two regions can be recognized in absorption coefficient related to the direct band gaps, which are about 3.93 eV of the fundamental energy gap and 2.11eV of the onset gap. The theoretical WempleDiDomenico model has been performed to quantify the static refractive index n and the dispersion energy in addition to the oscillation energy (Eo). The results reveal that the data of the refractive index dispersion in this model obeyed the single oscillator, which is used to deduce the dispersion and the high frequency dielectric constant. In the examined wavelength range, it has been investigated the complex dielectric constant of PVA/SO dye thin films. The ratio of the carrier concentration to the effective mass has been estimated. Oscillation energy values have been examined in this study by describing the expression Eo ≈ Eg and checking the Wemple-DiDomenico model. PVA/SO thin films have interesting physical properties for solar cell applications.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270183","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}

引用次数: 0

A PV MPPT control method based on async-PSO and INC algorithm under shading condition 遮阳条件下基于异步-PSO 和 INC 算法的光伏 MPPT 控制方法

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-03-01 DOI: 10.15251/jobm.2024.161.17

W. L. Li, L.S. Chuah

{"title":"A PV MPPT control method based on async-PSO and INC algorithm under shading condition","authors":"W. L. Li, L.S. Chuah","doi":"10.15251/jobm.2024.161.17","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.17","url":null,"abstract":"For the time being, solar energy has received considerable attention and development on account of its distinct advantages, such as rich reserves and no geographical restrictions. Nevertheless, in practical applications, the photovoltaic module is easily affected by external environments, which gives rise to a decrease in photovoltaic power. The maximum power point tracking (MPPT) technology for PV power system is an effective method to elevate the efficacy of photovoltaic electricity conversion. The frequently used control methods include the perturb and observe (P&O) algorithm and the incremental conductance (INC) method, and so forth; these methods vary tremendously in terms of the required parameters, algorithm complexity, tracking speed, tracking accuracy, hardware requirements etc. This work puts forth a MPPT control method on the basis of Async-PSO and INC algorithm to achieve a better performance in the MPPT. To reflect the change of light amplitude and temperature in a day, the temperature varies from 25℃ to 60℃ and irradiance from 450W/m2 to 900W/m2 . An extensively used mono-crystalline silicon PV module with 240W was considered as the research object to compare the capability of the recommended MPPT control method. MATLAB/Simulink software was adopted to model and simulate the algorithm. Aside from that, comprehensive comparisons were made with other MPPT methods to test and verify the recommended algorithm has significantly improved the tracking speed and accuracy at the maximum power point with smaller oscillations under various conditions.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270467","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}

引用次数: 0

Performance analysis of OTFT with varying semiconductor film thickness for future flexible electronics 用于未来柔性电子产品的不同半导体薄膜厚度 OTFT 性能分析

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-03-01 DOI: 10.15251/jobm.2024.161.55

S. K. Jain, A. M. Joshi, C. Kirpalani

引用次数: 0

Antimicrobial and corrosion inhibition activity of Schiff base in mild steel of HCl and H2SO4 acidic solutions 盐酸和 H2SO4 酸性溶液中席夫碱对低碳钢的抗菌和缓蚀活性

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2024-01-01 DOI: 10.15251/jobm.2024.161.1

K. Senthil Murugan, T. Mohanapriya

{"title":"Antimicrobial and corrosion inhibition activity of Schiff base in mild steel of HCl and H2SO4 acidic solutions","authors":"K. Senthil Murugan, T. Mohanapriya","doi":"10.15251/jobm.2024.161.1","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.1","url":null,"abstract":"The purpose of synthesizing two different types of Schiff base compounds, such as 2-[(4-Nitrophenyl)Imino]MethylPhenol (2, 4- NMP) and 2-[4-MethoxyPhenyl)Imino] Methyl}Phenol (2,4-MMP), are to improve the corrosion inhibition efficiency of Mild steel (MS) using acidic solutions of 1M HCl and 0.5M H2SO4 and investigated antimicrobial activity against bacteria gram positive Staphylococcus aureus and gram negative Escherichia coli. The – NO2 and – OCH3 substituent groups effects in the Schiff base azomethine system [– CH=N] have been investigated. The Fourier transform infrared (FTIR) spectral analysis confirms a range of 1728 –1760 cm-1 , the formation of the azomethine system [-CH=N] in synthesized compounds. Besides, the potential of corrosion was investigated studied by electrochemical impedance studies (EIS), which indicated a high semicircle formed because of the high resistance of allowing the moving of electrons through the metal-electrolyte solution, besides acting as a mixed kind of inhibitor. 2,4-MMP has better inhibition behavior than 2,4-NMP. The morphology of mild steel surface was revealed by the scanning electron microscope (SEM). Thermodynamic investigation showed that two synthesized Schiff bases have Langmuir adsorption isotherms with physisorption and chemisorptions mechanisms. Quantum chemical calculations have been investigated by density functional theory (DFT). These studies concludes that 2,4-MMP has a better corrosion efficiency found as 86.1 % compared with the 2,4-NMP found as 84.2% since the electron donating ability of the substituents – OCH3 to the electron rich azomethine system [-CH=N] group. Further synthesized compounds exhibits high activity against Staphylococcus aureus and Escherichia coli due to substituted groups.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521896","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}

引用次数: 0

Anti-cancer activity of novel Schiff base copper (II) complex: synthesis and characterization 新型希夫碱铜 (II) 复合物的抗癌活性：合成与表征

IF 1.1

Journal of Optoelectronic and Biomedical Materials Pub Date : 2023-12-01 DOI: 10.15251/jobm.2023.154.127

R. Kothari

{"title":"Anti-cancer activity of novel Schiff base copper (II) complex: synthesis and characterization","authors":"R. Kothari","doi":"10.15251/jobm.2023.154.127","DOIUrl":"https://doi.org/10.15251/jobm.2023.154.127","url":null,"abstract":"A novel thiosemicarbazone substituted schiff base ligand and its Cu(II) complex have been prepared and characterized. Schiff bases are considered as an important pro ligand in coordination chemistry because they easily form stable complexes with biologically active transition metal ions. Such as Cu 2+, Zn2+, Ni2+ etc. In this paper, novel Cu (II) complexes of thiosemicarbazone ligands were synthesised by refluxing thiosemicarbazone substituted pro ligands with copper salts in 1:1 molar ratio in absolute ethanol under thermal condition at 80o c for 5-6 hour. The resulting brown coloured copper complexes were filtered and recrystallized from petroleum ether. In this synthesis, we use absolute ethanol as a polar environment for the synthesis of copper complexes from schiff base ligands because the use of polar solvent medium in synthesis plays a very important role in reducing minimum possibilities of side reactions which hinders the proper conversion of ligands into copper complexes and also reducing the reaction time. All synthesized compounds were characterized through various spectroscopic and pharmacological techniques. FT-IR, UVVis, NMR, Mass, TGA-DTA, XRD spectra techniques were used to confirm the structures of copper complexes and ligands. All compounds are thermal stable up to 350o c. The good results of pharmacological activities of compounds like in-vitro anti -oxidant and anti - cancer activity against DPPH and cisplatin drug, explained the presence of biologically active functional groups are present in ligands as well as their copper complexes. Results found that the copper complexes were more active than the ligands. The synthesis of copper complexes from thiosemicarbazone schiff base ligands in proper stoichiometic ratio is an excellent method of preparing pharmacological active compounds which can be considered as good anti -cancer drug candidate for the treatment of cancer.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138614182","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}

引用次数: 0

Congo red pigment weeding out from water media via RuO2@ZnO nanostructure 通过RuO2@ZnO纳米结构从水介质中去除刚果红

Journal of Optoelectronic and Biomedical Materials Pub Date : 2023-10-01 DOI: 10.15251/jobm.2023.154.115

H. Idriss, A. I. Alakhras, A. Modwi

引用次数: 0