Asian Journal of Nanoscience and Materials最新文献_第2页

Synergistic effect of ionic liquid on additive performance of octyl acrylate-vinyl acetate copolymer and their comparison when added to lube oil 离子液体对丙烯酸辛酯-醋酸乙烯酯共聚物添加剂性能的增效作用及其在润滑油中的比较

Asian Journal of Nanoscience and Materials Pub Date : 2021-04-01 DOI: 10.26655/AJNANOMAT.2021.2.5

P. Ghosh, S. Yeasmin

{"title":"Synergistic effect of ionic liquid on additive performance of octyl acrylate-vinyl acetate copolymer and their comparison when added to lube oil","authors":"P. Ghosh, S. Yeasmin","doi":"10.26655/AJNANOMAT.2021.2.5","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2021.2.5","url":null,"abstract":"Ionic liquids (ILs) have come out as a promising lubricant additive in base oil during the past few years due to their low volatility, non–flammability, thermal stability, moisture stability and miscibility with organic compounds. In the present work, an investigation was carried out to determine whether the flow improvement property and shear stability of a polymeric additive can be affected when blended with an ionic liquid. We prepared a copolymer of vinyl acetate and octyl acrylate and blended it with imidazolium–based IL. Their performance as pour point depressant (PPD), viscosity index improver (VII) and also their stability against the mechanical shear in terms of permanent shear stability index (PSSI) were determined when added to the base oil as solo additive or as blend. The results revealed that the blend outweighs the polymer and the IL in all respect as a lubricant additive. As PPD, the best result was obtained in case of the blend at 4% concentration in both the base oils i.e. –12.1 °C and –13.7 °C in BO1 and BO2 respectively. Kinematic viscosity loss was least when the base oils were doped with the blend. This was supported by the PSSI data: 24.22 at 1% concentration in BO1 and 11.82 at 3% concentration in BO2.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82805145","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

Electrochemical deposition of tin doped zinc selenide (SnZnSe) thin film material 电化学沉积掺锡硒化锌(SnZnSe)薄膜材料

Asian Journal of Nanoscience and Materials Pub Date : 2020-06-01 DOI: 10.26655/AJNANOMAT.2020.3.3

I. Ikhioya, D. Okoli, Azibuike J. Ekpunobic

引用次数: 4

Electrochemical determination of Vitamin B6 in fruit juices using a new nanostructure voltammetric sensor 新型纳米结构伏安传感器电化学测定果汁中维生素B6

Asian Journal of Nanoscience and Materials Pub Date : 2020-06-01 DOI: 10.26655/ajnanomat.2020.4.5

Farzaneh Mehri-Talarposhti, A. G. Saraei, L. Golestan, S. Shahidi

引用次数: 8

Eco-friendly 2,4-D dimethylamine herbicide delivery system using synthesized nano-matrix 合成纳米基质的生态友好型2,4- d二甲胺除草剂输送系统

Asian Journal of Nanoscience and Materials Pub Date : 2020-06-01 DOI: 10.26655/AJNANOMAT.2020.3.2

I. Happiness, R. Wuana, N. Lami, S. Rufus

{"title":"Eco-friendly 2,4-D dimethylamine herbicide delivery system using synthesized nano-matrix","authors":"I. Happiness, R. Wuana, N. Lami, S. Rufus","doi":"10.26655/AJNANOMAT.2020.3.2","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2020.3.2","url":null,"abstract":"This study used chitosan as a capping agent and L-ascorbic acid as reducing agent to prepare copper nanoparticles encapsulated with 2,4-D dimethylamine herbicide via a green chemical reduction method to improve its herbicidal activity and reduce the negative environmental impacts associated with its application. Characterization of the synthesized CuCtsNPs and 2,4-D-CuCtsNPs was carried out using the following techniques; transmission electron microscopy (TEM), fourier transform- infra-red (FT-IR), scanning electron microscopy (SEM), energy-dispersive x-ray (EDX), powder x-ray diffraction (PXRD), differential scanning calorimeter (DSC), thermogravimetric and differential thermal analysis (TGA/DTA). The maximum absorption peak of CuCtsNPs was observed around 560 nm while that of 2,4-D-CuCtsNPs at 558 nm. The yield of CuCtsNPs was at the range of 40-92% and encapsulation efficiency of the 2,4-D-CuCtsNPs formulationwas 93%. Debye- Scherer’s equation was used to calculate the average crystalline size of the synthesized CuCtsNPs and 2,4-D-CuCtsNPs. The values were 38.78 nm (CuCtsNPs) and 54.93 nm (2,4-D-CuCtsNPs) respectively. The SEM images revealed the particle size of 21-56 nm for CuCtsNPs and 25-69 nm for 2,4-D-CuCtsNPs. The results obtained from the DSC and TGA curves of CuCtsNPs and 2,4-D-CuCtsNPs showed that the formulations exist in crystalline state and were thermally stable up to 401.73 °C. Aqueous release studies for the formulation were carried out in three different pH media and two agricultural soils. Leaching profile of the loaded CuCtsNPs through the soil layer (UAM and CAPS) demonstrated that the UAM soil had higher value for 2,4-D (58.67%) than in CAPS soil 40.78%. This study formulated an environmentally friendly herbicide delivery nano-matrix (CuCtsNPs) for the successful slow release of 2,4-D Dimethylamine herbicide in aqueous medium and agricultural soils.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73148612","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

An efficient one-pot, four-component synthesis of a series of pyrazolo [3,4-b] pyridines in the presence of magnetic LDH as a nanocatalyst 以磁性LDH为纳米催化剂，一锅法合成一系列吡唑[3,4-b]吡啶

Asian Journal of Nanoscience and Materials Pub Date : 2020-06-01 DOI: 10.26655/ajnanomat.2020.3.7

Fatemeh Majidi Arlan, Ramin Javahershenas, J. Khalafy

引用次数: 1

Bio-synthesis of iron oxide nanoparticles using neem leaf cake extract and its influence in the agronomical traits of vigna mungo plant 印楝叶饼提取物生物合成氧化铁纳米颗粒及其对芒果植物农艺性状的影响

Asian Journal of Nanoscience and Materials Pub Date : 2020-01-01 DOI: 10.26655/AJNANOMAT.2020.1.4

R. Radhakrishnan, D. Lakshmi, F. Khan, Gopalakrishnan Ramalingam, K. Kaviyarasu, K. Kaviyarasu

{"title":"Bio-synthesis of iron oxide nanoparticles using neem leaf cake extract and its influence in the agronomical traits of vigna mungo plant","authors":"R. Radhakrishnan, D. Lakshmi, F. Khan, Gopalakrishnan Ramalingam, K. Kaviyarasu, K. Kaviyarasu","doi":"10.26655/AJNANOMAT.2020.1.4","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2020.1.4","url":null,"abstract":"In this work reports the synthesis of iron oxide along with the complex formation from the neem cake using the biosynthesis and precipitation method. Ferrous sulphate (FeSO4) and sodium hydroxide were used as the precursor precipitating agent, respectively. The resultant specimens were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), ultra-violet visible spectroscopy (UV-Vis), fourier-transform infrared spectroscopy (FT-IR), soil test, biochemical, and phytochemical analysis. To test the effect of the synthesized specimen as the nanofertilizer in the seed germination and the growth, the sample was incorporated in to the red soil and the agronomical traits including plant height. Number of leaves were studied over a survival period of 75 days of the selected plant species vigna mungo using POT analysis. The plant samples were harvested, and then the biochemical and phytochemical studies were carried out for alkaloids, glycosides, flavonoids, phenols, steroids, protein and total chlorophyll content. The results showed that the nanoparticles incorporation enhanced the plant growth and increased the concentration of the bioactive compounds in an appreciable level.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81487968","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: 10

Comparative investigations of synthesis TiO2 Nano-Particles from four different types of alcohols by Sol-Gel method and evaluation of their antibacterial activity 溶胶-凝胶法制备四种不同类型醇合成TiO2纳米粒子的比较研究及其抗菌活性评价

Asian Journal of Nanoscience and Materials Pub Date : 2019-10-01 DOI: 10.26655/ajnanomat.2019.4.7

Mariam Farag Ambaraka, Fawzia Muftah Aljazwia, Randa Fawzi Alsupikhe

{"title":"Comparative investigations of synthesis TiO2 Nano-Particles from four different types of alcohols by Sol-Gel method and evaluation of their antibacterial activity","authors":"Mariam Farag Ambaraka, Fawzia Muftah Aljazwia, Randa Fawzi Alsupikhe","doi":"10.26655/ajnanomat.2019.4.7","DOIUrl":"https://doi.org/10.26655/ajnanomat.2019.4.7","url":null,"abstract":"TiO2 nanoparticles were synthesized using a simple reaction of TiCl4 with different types of primary and secondary alcohols. Four different alcohols (ethanol, isopropyl, isobutyl, and isobentyl alcohol) were investigated. The experiments were carried out to compare the products of the reactions with different precursors. The gelatine products were calcined at 400 °C and at 1000 °C in a box furnace and the effect of calcination temperature on the feature of nano-particles was studied. The synthesized TiO2 nanoparticles were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results revealed that the average particle size was 8.9-18.4 nm. The antibacterial result of titanium dioxide nanoparticles at four types of bacteria was two gram-positive (Staphylococcus aureus and Streptococcus sp.) and two gram-negative (Escherichia coli and Klebsiella sp.). Also, nanoparticles titanium dioxide did not have any effect on these types of bacteria. The sol-gel method could be used for applications that involve nano-crystalline TiO2 with anatase phase with low cost and simple preparation.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77104893","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 activity of magnesium oxide nanostructures prepared by hydrothermal method 水热法制备氧化镁纳米结构的抗菌活性研究

Asian Journal of Nanoscience and Materials Pub Date : 2019-09-01 DOI: 10.26655/ajnanomat.2019.4.6

Shah Rukh, A. H. Sofi, M. A. Shah, S. Yousuf

引用次数: 6

A computational study of thermophysical, HOMO, LUMO, vibrational spectrum and UV-visible spectrum of cannabicyclol (CBL), and cannabigerol (CBG) using DFT 用DFT计算了大麻环酚(CBL)和大麻酚(CBG)的热物理、HOMO、LUMO、振动光谱和紫外可见光谱

Asian Journal of Nanoscience and Materials Pub Date : 2019-09-01 DOI: 10.26655/AJNANOMAT.2019.4.8

Nuruzzaman Sarker, A. Kumer, Mohammad Jahidul Islam, Sunanda Paul

{"title":"A computational study of thermophysical, HOMO, LUMO, vibrational spectrum and UV-visible spectrum of cannabicyclol (CBL), and cannabigerol (CBG) using DFT","authors":"Nuruzzaman Sarker, A. Kumer, Mohammad Jahidul Islam, Sunanda Paul","doi":"10.26655/AJNANOMAT.2019.4.8","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.8","url":null,"abstract":"Cannabicyclol, also called CBL, is one of the least known and studied isomer of cannabinoids in the cannabis plant, and it is the precursor of the different cannabinoids found in marijuana plant having with widespread medicinal use. In this work, the thermophysical properties of CBL such as, free energy, entropy, dipole moment, binding energy, nuclear energy, electronics energy, and heat of formation were estimated using density functional theory for developing use as pharmaceutical pursues. In addition, the chemical reactivity properties including highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), HOMO-LUMO gap, ionization potential, electronegativity, hardness, softness, and electron affinity were evaluated. It was found that, the magnitude of HOMO was -8.98 and -8.53, LUMO was 0.19, -0.31 and HOMO –LUMO gap was -9.17 and -8.22 eV of CBL and CBG, respectively. The vibrational spectrum and electronics spectrum were simulated for identification and characterization. These studies provided a proper and predictable data for further use in any chemical and pharmaceutical purpose.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90192888","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: 6

Preparation of different manganese oxide structures via controlling the concentration and the type of the alkaline media 通过控制碱性介质的浓度和种类，制备了不同结构的氧化锰

Asian Journal of Nanoscience and Materials Pub Date : 2019-07-01 DOI: 10.26655/AJNANOMAT.2019.2.3.4

S. Said, M. Riad, S. Mikhail

引用次数: 1