Journal of Applied Sciences and Nanotechnology最新文献_第2页

Biogenic Synthesis, Spectroscopic Characterization and Bioactivity of Cymbopogon citratus Derived Silver Nanoparticles 柠檬香蒲衍生银纳米粒子的生物合成、光谱特性和生物活性

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.7012.1226

N. Basosila, C. Inkoto, Ormiel Maganga, Blaise M. Mbembo, Giresse N. Kasiama, Carlos N. Kabengele, C. Falanga, C. Masengo, P. Mpiana, K. Ngbolua

{"title":"Biogenic Synthesis, Spectroscopic Characterization and Bioactivity of Cymbopogon citratus Derived Silver Nanoparticles","authors":"N. Basosila, C. Inkoto, Ormiel Maganga, Blaise M. Mbembo, Giresse N. Kasiama, Carlos N. Kabengele, C. Falanga, C. Masengo, P. Mpiana, K. Ngbolua","doi":"10.53293/jasn.2023.7012.1226","DOIUrl":"https://doi.org/10.53293/jasn.2023.7012.1226","url":null,"abstract":"The use of plant extracts as a bio-reducer for the synthesis of silver nanoparticles has attracted attention due to its rapid, ecological, non-toxic and economical protocol. The aim of this study was to investigate the possibility of synthesizing silver nanoparticles using Cymbopogon citratus leaf extract, and characterizing them by Ultraviolet-visible spectroscopy, X-ray Diffraction and X-ray Fluorescence in order to determine their size and composition, as well as to evaluate them in-vitro bioactivity on selected models. The results of this study show that silver nanoparticles were successfully synthesized, with a size of 29.49 nm. The silver nanoparticles showed bactericidal activity against all three types of bacteria ( E. coli ATCC 25922, S. aureus ATCC 25923, and P. aerugunosa ATCC 27853) at the minimum inhibitory concentration (MIC=31.25 μg/mL), larvicidal activity against Anopheles larvae and reasonable antioxidant properties. All these results demonstrate the biopharmaceutical potential of these new products. These nanoparticles, synthesized from plant extracts, could be a promising solution for the treatment of a number of diseases, including malaria, bacterial infections and diseases caused by oxidative stress.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326762","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

Stimulated Raman Scattering of Q-Gaussian Laser Beam in an Unmagnetized Plasma 非磁化等离子体中 Q 高斯激光束的受激拉曼散射

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.7035.1230

Ahmed Ahmed, H. Salih, K. Hassoon, Sukhdeep Kaur

引用次数: 0

Microstructure-Modulated Antibacterial Performance of Chemically Precipitated SnO2 Nanoparticles 化学沉淀二氧化锡纳米粒子的微观结构调整抗菌性能

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.7107.1246

S. Batros, Mohammed Ali, Ali Addie

{"title":"Microstructure-Modulated Antibacterial Performance of Chemically Precipitated SnO2 Nanoparticles","authors":"S. Batros, Mohammed Ali, Ali Addie","doi":"10.53293/jasn.2023.7107.1246","DOIUrl":"https://doi.org/10.53293/jasn.2023.7107.1246","url":null,"abstract":"Tin oxide (SnO 2 ) nanoparticles were synthesized via a facile chemical precipitation route using tin chloride (SnCl 2 •2H 2 O) as precursor and ammonia as precipitant. The as-synthesized nanoparticles were subjected to post-calcination at 300°C, 400°C and 500°C and thoroughly characterized by advanced techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS) and Fourier transform infrared (FTIR) spectroscopy. XRD patterns revealed the formation of tetragonal SnO 2 crystalline phase with average crystallite sizes of 11.9 nm, 13.9 nm and 17.2 nm for the samples calcined at 300°C, 400°C and 500°C respectively. SEM micrographs demonstrated agglomerated and irregular morphology of the calcined SnO 2 nanoparticles. FTIR spectra confirmed the presence of characteristic Sn-O and O-Sn-O vibrational modes in the calcined SnO 2 samples. The antibacterial activity of the synthesized nanoparticles was evaluated against model Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacterial strains by standard zone of inhibition assays. Remarkably, the SnO 2 nanoparticles exhibited excellent antibacterial activity due to their high specific surface area. A systematic increase in the inhibition zone diameter was observed with decrease in crystallite size of SnO 2 for both bacterial strains, suggesting an inverse relationship between crystallite size and antibacterial behavior. The present work demonstrates a simple, eco-friendly synthesis of antibacterial SnO 2 nanoparticles with controlled crystallite size by tuning the calcination temperature.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139329429","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

Versatile Applications of Mannich Base Ligands and their Metal ‎Complexes: A Review Article 曼尼希碱配体及其金属配合物的广泛应用：综述文章

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.7033.1228

Enass Waheed, Ali M. A. Al-khazraji, A. Ahmed

{"title":"Versatile Applications of Mannich Base Ligands and their Metal ‎Complexes: A Review Article","authors":"Enass Waheed, Ali M. A. Al-khazraji, A. Ahmed","doi":"10.53293/jasn.2023.7033.1228","DOIUrl":"https://doi.org/10.53293/jasn.2023.7033.1228","url":null,"abstract":"Mannich base is a versatile compound that can be easily modified to introduce different functional groups, allowing for the creation diverse selection of items with varying features. Additionally, the Mannich reaction is a valuable tool in organic synthesis, due to the fact it provides an effortless and efficient approach for synthesizing C-N bonds. Overall, The Mannich base and even its derivatives are essential in many aspects of chemistry and its complexes are in the pharmaceutical industry. Studies have revealed that it shows good anti-cancer, anti-mycobacterial, remarkable anti-HIV, anti-tubercular, anti-convulsant, anti-fungal, antiviral, antitumor, cytotoxic activities and in industrial applications such as in the creation of polymers, surface activity agents, deter gents and resins. The presence of the basic Mannich sidechain has shown marked antimalarial, anti - inflammatory, analgesic and anti - microbial activities. These compounds have also been shown to inhibit corrosion, as well as antioxidant and reducing agents. This review article shows the definition, importance and different applications of Mannich base ligands with transitional metal. These complexes exhibit potent anti-microbial, antiviral, and anti-cancer activities, showcasing their potential in pharmaceutical research and drug development. Moreover, the luminescent properties of Mannich base metal complexes have been harnessed for applications in optoelectronics and sensing. Their tunable emission profiles make them suitable candidates for various sensing platforms and light-emitting devices Mannich base metal complexes","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139326959","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

Connection between Graphs' Chromatic and Ehrhart Polynomials 图形的色度多项式与艾哈特多项式之间的联系

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.6994.1220

Ola Neamah, Shatha Salman

引用次数: 0

Bioinformatical Prediction of G-quadruplex Aptamer for Detection of a Ligand in Practice 用于检测配体的 G-quadruplex Aptamer 的生物信息学预测实践

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-10-01 DOI: 10.53293/jasn.2023.7058.1234

Mohammad Reza Hosseini VeleshKolaei, Pooria Gill, A. Rafati, Marzieh Adiani

{"title":"Bioinformatical Prediction of G-quadruplex Aptamer for Detection of a Ligand in Practice","authors":"Mohammad Reza Hosseini VeleshKolaei, Pooria Gill, A. Rafati, Marzieh Adiani","doi":"10.53293/jasn.2023.7058.1234","DOIUrl":"https://doi.org/10.53293/jasn.2023.7058.1234","url":null,"abstract":"Considering the introduction of aptamers as a new generation of analyte identifiers, this class of materials can be used in diagnostic systems because aptamers are easier to produce, more sensitive, higher accuracy, less sensitive to environmental factors, easier to handle and can be used. A special type of aptamer that has sequence rich in guanine base can create a special nanostructure called G-quadraplex. The creation of this structure gives the aptamer an enzyme property so that it can act like an enzyme in the vicinity of it, oxidize a chromogenic substrate and produce a colored signal. The main way to produce aptamers is a laboratory technique called SELEX (Systematic evolution of ligands by exponential enrichment), in which a mixture of different oligo libraries in the vicinity of the target analyte creates aptamers in several consecutive cycles. The aim of this study was the introduction a novel approach for obtaining DNA aptamers for detection a ligand such as aflatoxin M1 in bioinformatically manner in replacing to SELEX for obtaining the specific oligoaptamers against aflatoxin M1. For this purpose, the structure of the selected oligoaptamers were predicted using some molecular simulators and bioinformatically techniques. The results of these molecular simulations suggested G-quadruplex aptamers with suitable affinity for binding to aflatoxin M1 in colorimetric assays.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325332","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

Preparation of Black Carbon Nanoparticles from Two Sources of Oil Residues with Direct and Indirect Ultrasonic Process 直接和间接超声法从两种油渣源制备黑碳纳米颗粒

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-09-01 DOI: 10.53293/jasn.2023.6760.1207

Rusul Alsaffar, Balqees Al-Dabbagh, Hanaa Jawad

{"title":"Preparation of Black Carbon Nanoparticles from Two Sources of Oil Residues with Direct and Indirect Ultrasonic Process","authors":"Rusul Alsaffar, Balqees Al-Dabbagh, Hanaa Jawad","doi":"10.53293/jasn.2023.6760.1207","DOIUrl":"https://doi.org/10.53293/jasn.2023.6760.1207","url":null,"abstract":"In this work, two methods for creating carbon nanoparticles from oil waste or by products, which accumulate on pipes and Furnaces walls and reduce equipment efficiency and service life (that can hinder the production process, accordingly it is removed weekly) — are compared. These waste products or by products result from the incomplete burning of hydrocarbon compounds during crude oil refining to produce petroleum products. The raw materials had been gathered from two places from Al-Dura refinery, sieving, burned in furnace of atmosphere that was both vacuumed and inert, crushed by mortar and washed by solvent, washing by distilled water, drying then reduced to nanoparticle size using direct crushing (sonication by probe) and indirect ultrasonic (bath sonication) processes. The samples were examined using the relevant procedures, such as EDX and SEM, as well as tests following crushing and burning. Zeta potential and particle size analysis were two additional tests conduct on the final products. The results showed that after burning, the proportion of carbon increased from 28.49, 36.30 to 91.59, and 94.47 % sequentially. Also, the direct ultrasonic method is superior to the indirect method for manufacturing carbon nanoparticles, which required less time and able to produce nanoparticles with average granular sizes about 37 nm and 86.6 nm for the first and second samples, respectively. Zeta potential data proved the resulting Nano carbon particles are quite stable","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135249519","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

Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir 裂隙堰上游冲刷室内试验与数值模型

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-09-01 DOI: 10.53293/jasn.2023.6199.1199

Ruaa Hamdan, Aqeel Al-Adili, Thamer Mohammed

{"title":"Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir","authors":"Ruaa Hamdan, Aqeel Al-Adili, Thamer Mohammed","doi":"10.53293/jasn.2023.6199.1199","DOIUrl":"https://doi.org/10.53293/jasn.2023.6199.1199","url":null,"abstract":"This study presents an experimental measurements and three-dimensional simulation of time-varying scour, along with the variables affecting the resulted scour hole dimensions and evolution at center and side weirs. Slit weir location, crest level, flow rate and sediment size were tested within 34 steady and unsteady flow conditions under various flow rates 125, 95, 62, 50 and 34 L/s to study the scour behavior. All tests were carried out with non-uniform sediments of median sizes 0.24 mm and 0.55 mm. Steel slit weirs of 0.25 m width, 0.004 m thickness, and 0.07, 0.12 and 0.17 m crest level with respect to the mobile bed surface, which was constructed in a laboratory flume made up of brick and concrete within dimensions of (8 m, 1.25 m, and 1 m) long, wide and deep respectively. The present research demonstrates that maximum values of scour volume and scour depth obtained when the weir locate at center of the flume with flat crest for both steady and unsteady flow. Besides, the results indicated a low discrepancy between the experimental measures and the sediment scour model FLOW 3D software, both are showed a good agreement in presenting the scour development accurately as well as the model had excellent ability in predicting the velocity magnitudes at the slit location and the values of shear stress which was hard to measure directly.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248220","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

The Effect of Nutrients and Their Role in the Progression of Periodontal Disease 营养素的作用及其在牙周病进展中的作用

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-09-01 DOI: 10.53293/jasn.2023.6159.1198

Sara Ali, M. Ali, Abdulnasser Al-Gebori, Hassanien Al-Jumaily, Poh Ooi, Asalnov Nuraddin

{"title":"The Effect of Nutrients and Their Role in the Progression of Periodontal Disease","authors":"Sara Ali, M. Ali, Abdulnasser Al-Gebori, Hassanien Al-Jumaily, Poh Ooi, Asalnov Nuraddin","doi":"10.53293/jasn.2023.6159.1198","DOIUrl":"https://doi.org/10.53293/jasn.2023.6159.1198","url":null,"abstract":"Periodontal disease is a common disease and may affect 90% of people, and is classified into gingivitis and periodontitis. The objective of this study was if the deficiency of some vitamins and trace elements affects the increase in exposure to periodontal diseases or to find out whether the periodontal disease can cause changes in the blood level of some nutrients and their role in reducing periodontal diseases. For this purpose, samples were taken from the University of Baghdad, College of Dentistry, Department of Periodontics, in the Periodontics clinic, including a group of 40 patients’ periodontitis, as well as another 40 patients’ gingivitis, and 40 healthy periodontium as control. There was no overall sickness in any of the groups. Periodontal clinical data were recorded, and serum parameter levels were assessed. The findings showed that plaque index, bleeding on probing, probing pocket depth, and clinical attachment loss were significantly greater (P< 0.01) in patients compared to the control. Levels of vitamin C and D were significantly decreased in patients compared with control (P<0","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248221","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

Characterization of Prepared Polyaniline Nanofibers Based on a Hydrothermal Variation of Aniline Concentration 基于水热变化苯胺浓度的聚苯胺纳米纤维表征

Journal of Applied Sciences and Nanotechnology Pub Date : 2023-09-01 DOI: 10.53293/jasn.2023.6439.1204

Sura Mohammed, Mukhlis Ismail, Isam Ibrahim

{"title":"Characterization of Prepared Polyaniline Nanofibers Based on a Hydrothermal Variation of Aniline Concentration","authors":"Sura Mohammed, Mukhlis Ismail, Isam Ibrahim","doi":"10.53293/jasn.2023.6439.1204","DOIUrl":"https://doi.org/10.53293/jasn.2023.6439.1204","url":null,"abstract":"Polyaniline nanofibers (PAni-NFs) have been synthesized under various concentrations (0.12, 0.16, and 0.2 g/l) of aniline and different times (2h and 3 h) by hydrothermal method at 90°C. Was conducted with the use of X-ray diffraction (XRD), Fourier Transform Infrared spectra (FTIR), Ultraviolet-Visible (UV-VIS) absorption spectra, Thermogravimetric Analysis (TGA), and Field Emission-Scanning Electron Microscopy (FE-SEM). The X-ray diffraction patterns revealed the amorphous nature of all the produced samples. FE-SEM demonstrated that Polyaniline has a nanofiber-like structure. The observed typical peaks of PAni were (1580, 1300-1240, and 821 cm-1), analyzed by the chemical bonding of the formed PAni through FTIR spectroscopy. Also, tests indicated the promotion of the thermal stability of polyaniline nano-composite at temperatures above 600°C. Still, the PAni-0.12 g/l sample was better than the other samples, and the optical parameters manifested a decrease in the band gap (Eg) band gap. The observed TGA test findings also promoted Polyaniline's thermal stability at temperatures reaching 600°C.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135200309","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