Journal of Applied Sciences and Nanotechnology最新文献_第6页

Investigating Some Properties of Nanocomposites for Dental Restoration Materials 纳米复合材料在口腔修复材料中的若干性能研究

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4629.1131

I. Ghazi, Jawad K. Oleiwi, S. Salih, M. Mutar

{"title":"Investigating Some Properties of Nanocomposites for Dental Restoration Materials","authors":"I. Ghazi, Jawad K. Oleiwi, S. Salih, M. Mutar","doi":"10.53293/jasn.2022.4629.1131","DOIUrl":"https://doi.org/10.53293/jasn.2022.4629.1131","url":null,"abstract":"In this work, it was evaluated the wear resistance, hardness, and surface roughness values of resin-based composites that applied in dentistry as restorative materials. The resin composites were made from six types of resin matrixes (A, B, C, D, E, and F) and each one of them has contained different types and ratios of monomers as well as the inorganic nano-fillers (SiO 2 , ZrO 2 , HA, and Al 2 O 3 ). For each test, thirty specimens were prepared, which were classified into six groups depending on the types of the resin matrix and fillers used in the composites. The results prove that the nanocomposites that have the lowest rate of wear were the group E which was derived from the resin matrix of the group E that has monomers are (BIS-GMA, meth acrylamide, methacrylic acid, and 1-6 hexanediol methacrylate) with values range from 8.11 to 6.11 mm 3 /mm depending on the filler type material. All prepared composites resin materials (A to F) showed an increase in their hardness values as regards the reference, group D showed the highest hardness value followed by group B while group C was the lowest. The highest mean roughness was shown in","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"127 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88038290","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: 3

Effect of Crosslinking Agent (Zinc Chloride) on the Swelling Ratio and Water Retention Capacity of Polyacrylate and Polyvinyl Alcohol 交联剂氯化锌对聚丙烯酸酯和聚乙烯醇溶胀率和保水性能的影响

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4703.1138

S. Kadhim, Awham M. Hameed, R. Rasheed

{"title":"Effect of Crosslinking Agent (Zinc Chloride) on the Swelling Ratio and Water Retention Capacity of Polyacrylate and Polyvinyl Alcohol","authors":"S. Kadhim, Awham M. Hameed, R. Rasheed","doi":"10.53293/jasn.2022.4703.1138","DOIUrl":"https://doi.org/10.53293/jasn.2022.4703.1138","url":null,"abstract":"In this study, using potassium polyacrylate (KPA), polyvinylalcohol (PVA), and zinc chloride as cross-linking agents, successfully synthesized novel superabsorbent polymers. Different weight ratios of KPA and PVA were used to prepare the polymers using polymerization solution. So, polymers with different weight ratios made from PVA and KPA. Superabsorbent polymers (SAPs) were produced using a simple approach at ambient temperature. By comparing absorption peaks, Fourier transform infrared spectroscopy (FTIR) and UV analysis were utilized to investigate the molecular interactions. The morphology of superabsorbent polymers was investigated by scanning electron microscopy (SEM). According to FT-IR, UV, and SEM results, the superabsorbent polymers (Zn-KPA and Zn-PVA) were prepared successfully. A comparison of Zn-KPA and Zn-PVA SAPs was conducted. The effects of cross-linking on water absorption were investigated. The Zn-PVA superabsorbent polymer has a maximum swelling capacity of 407%, while the swelling ratio of the Zn-KPA was 304%. Thus, these prepared superabsorbent polymers could be used for agricultural applications such as water storage. With increasing zinc chloride content and time, superabsorbent polymers’","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85132883","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

Thermal and Catalytic Pyrolysis of Plastic Waste: Catalysts Characterization and Properties of the Liquid Products 塑料废弃物热催化热解:催化剂表征及液体产物性能

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4720.1140

Zahraa A. Hussein, Zaidoon M. Shakor, M. Alzuhairi

{"title":"Thermal and Catalytic Pyrolysis of Plastic Waste: Catalysts Characterization and Properties of the Liquid Products","authors":"Zahraa A. Hussein, Zaidoon M. Shakor, M. Alzuhairi","doi":"10.53293/jasn.2022.4720.1140","DOIUrl":"https://doi.org/10.53293/jasn.2022.4720.1140","url":null,"abstract":"Nowadays, sustainable energies can be found by thermal and catalytic pyrolysis of plastic waste. This study uses high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) to investigate thermal and catalytic pyrolysis using a stainless-steel semi-batch reactor at different conditions: Temperatures (350 - 500°C) and residence times (60, 90, and 120 min). The catalysts were undergone to different characterization techniques such as EDX, SEM, and BET that revealed the PR.9 catalyst consists of Cobalt, Molybdenum, and Platinum loaded on Al 2 O 3 . Whereas, the chemical compositions of Platinum RG-412 catalyst contain Chlorine and Platinum. The SEM analysis showed that the PR.9 catalyst is more active than RG-412 for the degradation of plastics. In addition, the properties of the liquid products like density, API, and viscosity were studied. As a result, the properties of the liquid produced by the plastic pyrolysis were similar that those produced from the petroleum refineries. The API findings declared that almost all of the liquids produced were light products, which contain mainly diesel oil, gas oil, kerosene, and gasoline.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82135654","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: 1

Using Response Surface Methodology to Optimize Biodiesel Production from Sweet Almond (Prunusamygdalus Dulcis) and Jatropha (Jatropha Curcas) Seed Oils 利用响应面法优化甜杏仁(Prunusamygdalus Dulcis)和麻疯树(Jatropha Curcas)种子油生产生物柴油

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4622.1129

A. O. Mustapha, Ahmed Dare Sarumi, Sheriphdeen Abiodun Adewuyi, Emmanuel Oluwatobi Ayantoyinbo, Blessing Ruth Adebayo, Rhoda Opeyemi Adams, Zainab Jasmie Abdulsalam, Samson Oladapo Bello

{"title":"Using Response Surface Methodology to Optimize Biodiesel Production from Sweet Almond (Prunusamygdalus Dulcis) and Jatropha (Jatropha Curcas) Seed Oils","authors":"A. O. Mustapha, Ahmed Dare Sarumi, Sheriphdeen Abiodun Adewuyi, Emmanuel Oluwatobi Ayantoyinbo, Blessing Ruth Adebayo, Rhoda Opeyemi Adams, Zainab Jasmie Abdulsalam, Samson Oladapo Bello","doi":"10.53293/jasn.2022.4622.1129","DOIUrl":"https://doi.org/10.53293/jasn.2022.4622.1129","url":null,"abstract":"The depletion of natural resources and the negative impact of oil on the environment have sparked interest in biodiesel as an alternative source of energy. Indigenous vegetable oils have the potential to be used as biodiesel feedstocks. Transesterification of vegetable oils produces biodiesel, which is regulated by numerous inputs factors, such as catalyst dosage, temperature, speed, and time while the density and specific gravity are outputs. Sweet almond (prunusamygdalus dulcis) and jatropha (jatropha curcas) seed oils were used to optimize conditions for the transesterification processes using the response surface methodology (RSM). The experimental matrix at different sodium hydroxide doses (0.3 – 1.5 wt %), intensity (500 – 1000 rpm), and time (20 – 60 min) in the presence of fixed molar ratio, and temperature were designed to optimize the biodiesel output variables (yield, specific gravity, and density).The analysis of variance (ANOVA) showed results for refined sweet almond biodiesel (RSAB) at catalyst (0.554 wt %),","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75020871","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: 2

Recent Advances to Overcome Methane Hydrate Formation Challenges Using Nanostructure Promoters: A Mini Review Towards Industrialization 利用纳米结构促进剂克服甲烷水合物形成挑战的最新进展:迈向工业化的综述

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4676.1133

Mohsen Hosseini

{"title":"Recent Advances to Overcome Methane Hydrate Formation Challenges Using Nanostructure Promoters: A Mini Review Towards Industrialization","authors":"Mohsen Hosseini","doi":"10.53293/jasn.2022.4676.1133","DOIUrl":"https://doi.org/10.53293/jasn.2022.4676.1133","url":null,"abstract":"Natural gas has recently drawn considerable attention due to its low emissions upon combustion. Pipeline transmission of natural gas is costly and always encounters different obstacles. Therefore, an effective industrial alternative for the storage and transmission of natural gas is needed. Hydrates, also known as solidified natural gas, have been proven to be a more feasible replacement compared to pipeline transmission, CNG, or LNG. Scientists have introduced promoters to shorten the induction time, increase the storage capacity, and improve the stability of hydrates. Nanostructure materials have demonstrated promising promotion results, suggesting a bright future and a critical step in the industrialization of this technology. Researchers have mainly used pure methane, which is the main component of natural gas, to form hydrates. In this article, the fundamentals of the selection of a nanopromoter, the hydrate formation process, and related calculations are demonstrated. Finally, recent results have been brought together to provide an overview of advances towards the use of nanostructure promoters to tune hydrates for future industrial processes.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74305109","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

Rheological Properties Improvement of Treated Palygorskite Drilling Mud by Adding Prepared Nano Magnesium Oxide 纳米氧化镁对处理后坡缕石钻井液流变性能的改善

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4604.1128

Worood A. Abd-Alameer, A. Al-adili, Sadeer Khatab

{"title":"Rheological Properties Improvement of Treated Palygorskite Drilling Mud by Adding Prepared Nano Magnesium Oxide","authors":"Worood A. Abd-Alameer, A. Al-adili, Sadeer Khatab","doi":"10.53293/jasn.2022.4604.1128","DOIUrl":"https://doi.org/10.53293/jasn.2022.4604.1128","url":null,"abstract":"Attapulgite clay is a hydrated magnesium aluminum silicate mineral. Attapulgite clay stone in the Bahr al-Najaf region contains calcite and quartz minerals (43.4%. and 13.9% by weight), respectively. This work is devoted to develop the attapulgite clay found in Bahr Al-Najaf to be suitable for oil wells drilling. The goal of this project is to develop attapulgite mud that meets the American Petroleum Institute (API) for the application of oil well drilling mud in Bahr Al-Najaf. To achieve this objective, unwanted materials (calcite and quartz particles greater than 75 µm in diameter) should be removed and the attapulgite rods dispersed. To make attapulgite mud appropriate for oil well drilling mud. Wet sieving was used to remediate Iraqi attapulgite mud in this study. XRD and SEM tests were done to determine the metals and shape of the prepared Nano MgO to improve the rheological properties. The rheological parameters of attapulgite were measured using an ofite viscometer. Nano MgO was added to attapulgite in three proportions (0.02, 0.05, and 0.08) gm wt. Magnesium oxide showed a great contribution to apparent viscosity","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81298934","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: 1

Experimental Study of Thermal and Catalytic Decomposition of PVC Wastes 聚氯乙烯废弃物热催化分解实验研究

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4639.1132

Murtadha Al-Eissa, Riaydh S. Almukhtar, Bashir Y. Sherhan

{"title":"Experimental Study of Thermal and Catalytic Decomposition of PVC Wastes","authors":"Murtadha Al-Eissa, Riaydh S. Almukhtar, Bashir Y. Sherhan","doi":"10.53293/jasn.2022.4639.1132","DOIUrl":"https://doi.org/10.53293/jasn.2022.4639.1132","url":null,"abstract":"The excessive use of plastics in the last years is the challenge that has arisen in managing plastic wastes to avoid dangerous effects. Polyvinyl chloride is part of these wastes. It can be utilized to produce fuel-like petroleum fractions depending on pyrolysis, which is the thermal decomposition of plastics in the absence of oxygen. This work aims to reduce environmental pollution and reuse plastic waste as an alternative fuel source. A comparison of the thermal and catalytic processes under the optimum temperature 450 o C, pressure 20 bar, and residence time 1hour in a semi-batch reactor with and without adding Pt/Al 2 O 3 and NiMo/Al 2 O 3 catalysts. Thermo-gravimetric analysis (TGA) analysis was made for PVC. Catalysts were characterized by X-RAY diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The liquid and gas products were analyzed by (GC/MS) to evaluate the quality of products. In the hydro-cracking reaction, most gas products were produced using NiMo/Al 2 O 3 catalyst, about 62.29 wt%. The aromatic and saturated-aliphatic in the liquid using NiMo/Al 2 O 3 catalysts were 21.07 and 72.81 wt%. The aromatics and saturated aliphatic in the liquid product using thermal non-catalytic and Pt/Al 2 O 3 catalysts were 23.83 wt% & 63.52 wt% and 21.88 wt% & 64.01, respectively. The ratio of gasoline range components is the highest in the hydrocracking process on NiMo/Al 2 O 3 catalysts. Using catalytic-hydrocracking on Pt/Al 2 O 3 gives the highest diesel range component. It was confirmed that the generated undesirable product seems was very few in the hydrocracking reactions compared to the thermal cracking reactions.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"30 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84985626","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 Medical Study of Denture Base Resin Poly(Methyl Methacrylate) Reinforced by ZnO and TCP Nanoparticles ZnO和TCP纳米颗粒增强义齿基托树脂聚甲基丙烯酸甲酯的医学研究

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-11-01 DOI: 10.53293/jasn.2022.4073.1137

Fatin A. Asim, E. Al-Mosawe, Wafaa A. Hussain

{"title":"The Medical Study of Denture Base Resin Poly(Methyl Methacrylate) Reinforced by ZnO and TCP Nanoparticles","authors":"Fatin A. Asim, E. Al-Mosawe, Wafaa A. Hussain","doi":"10.53293/jasn.2022.4073.1137","DOIUrl":"https://doi.org/10.53293/jasn.2022.4073.1137","url":null,"abstract":"Denture base poly (methyl methacrylate (PMMA) resin is one of the most frequently used materials in denture base synthesis, but due to its poor mechanical properties, PMMA can be considered a medium for the attachment and growth of a variety of pathogenic bacteria and fungi, particularly due to PMMA's pores and rough surface. The porosity percentage and surface roughness of the PMMA resin sample was lowered in this study, which resulted in a reduction in microorganisms' surface adhesion by varying the ratios of additives such as zinc oxide (ZnO) and tri-calcium phosphate (TCP) nanoparticles with (1, 2, 3, and 10% wt percent) for each additive separately, and 3% as a combination of ZnO and TCP nanoparticles in an equal ratio. Additionally, mechanical features such as surface hardness are developed, which is a critical attribute for polishing and easy finishing, as well as offering great scratch resistance during denture base cleaning. These results indicated that when compared to the other groups, PMMA (ZnO wt. 1%) and TCP-wt. 1%) reinforced composite resins demonstrated the best optimum properties. Additionally, it was discovered that adding 1% of NPs improved the mechanical qualities, which benefited the biological properties by reducing bacterial adherence to the PMMA composite resin.","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89398510","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: 1

Antibacterial Studying of Silver Nanoparticles Synthesized by Chemical Reduction Method Using Different Stabilized Concentrations 不同稳定浓度化学还原法制备银纳米颗粒的抑菌研究

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-09-01 DOI: 10.53293/jasn.2022.4514.1118

Zahra Ghazi, Mohammad Mohammad, Manal A. Abbood, Amal-Saad Hussein

{"title":"Antibacterial Studying of Silver Nanoparticles Synthesized by Chemical Reduction Method Using Different Stabilized Concentrations","authors":"Zahra Ghazi, Mohammad Mohammad, Manal A. Abbood, Amal-Saad Hussein","doi":"10.53293/jasn.2022.4514.1118","DOIUrl":"https://doi.org/10.53293/jasn.2022.4514.1118","url":null,"abstract":"Silver nanoparticles were prepared by the chemical reduction method. Silver nitrate was taken as a metal precursor and sodium borohydride as a reducing agent with polyvinyl alcohol (PVA) stabilizers of different concentrations, polyvinylpyrrolidone (PVP). X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM) techniques have been used, these measurement results showed that the prepared material is silver nanoparticles. The average size of silver nanoparticles using the Scherrer equation with values ranging from 8.49-12.15nm. TEM images showed that the silver nanoparticles are spherical in size between 5-47nm. Nanoscale distribution of silver nanoparticles (AgNPs) prepared at different concentrations was studied by AFM. Silver nanoparticles showed high antimicrobial and antibacterial activity against Gram-positive bacteria such as Escherichia Coli and Gram-negative Staphylococcus aureus, whose bacterial activity was dependent on the concentration of PVA and PVP and the degree of intramolecular accumulation. Low concentrations of PVP lead to increase the activity, while high concentrations of PVA","PeriodicalId":15241,"journal":{"name":"Journal of Applied Sciences and Nanotechnology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73693127","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, Characterization and Mimetic Activities of Fe2O3 and Fe3O4 Nanoparticles as Catalase and Peroxidase 纳米Fe2O3和Fe3O4过氧化氢酶和过氧化物酶的制备、表征及模拟活性研究

Journal of Applied Sciences and Nanotechnology Pub Date : 2022-09-01 DOI: 10.53293/jasn.2022.4574.1127

Alaa E. A. Majeed, R. Rasheed

引用次数: 0