KONA Powder and Particle Journal最新文献_第10页

NMR as a Tool to Characterize the Aggregation Structure of Silica Nanoparticles in a Liquid 核磁共振作为表征液体中二氧化硅纳米颗粒聚集结构的工具

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020012

Chika Takai-Yamashita, Emiko Sato, M. Fuji

引用次数: 12

Microbial Aerosols: Sources, Properties, Health Effects, Exposure Assessment—A Review 微生物气溶胶:来源，性质，健康影响，暴露评估综述

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020005

R. Górny

{"title":"Microbial Aerosols: Sources, Properties, Health Effects, Exposure Assessment—A Review","authors":"R. Górny","doi":"10.14356/KONA.2020005","DOIUrl":"https://doi.org/10.14356/KONA.2020005","url":null,"abstract":"Microorganisms are ubiquitous in the environment. Wherever their sources are present, the particles can be released into the air forming microbiological aerosols. Although most of their particles cause no harm to the exposed individuals, some of their propagules may have infectious or allergenic potential and may carry toxic or irritant substances and components. Their inhalation usually poses a significant health risk and is responsible for numerous adverse outcomes, from allergic reactions, infections and toxic responses to various nonspecific symptoms. This review article provides fundamental background information on the role of microorganisms in the environment, defines and characterizes environmental sources of microbial aerosols, describes microbial abilities for airborne transport and comments on their role in atmospheric processes, discusses their physical and biological characteristics which result in adverse health outcomes observed in exposed individuals. The paper characterizes comprehensively numerous sampling and analysis techniques involved in the quantitative and qualitative evaluation of microbial aerosols together with their practical applications, presents strategies applied in the assessment of harmful microbial agents formed by bioaerosols, explains the ways of creating hygienic standards (understood here as reference/threshold limits) for microbiological aerosols conditioned by both medical and environmental determinants, and comments on their usefulness in the control and protection of environment and health.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"33 1","pages":"64-84"},"PeriodicalIF":4.1,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80188174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 38

Review of Encapsulated Salt Hydrate Core-Shell Phase Change Materials 包封盐水合物核壳相变材料研究进展

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020010

Wang Hui, Yunfa Chen, Jianqiang Li, Lijiang Guo, M. Fang

引用次数: 21

Synthesis of Precision Gold Nanoparticles Using Turkevich Method. Turkevich法合成精密金纳米颗粒。

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 Epub Date: 2020-02-29 DOI: 10.14356/kona.2020011

Jiaqi Dong, Paul L Carpinone, Georgios Pyrgiotakis, Philip Demokritou, Brij M Moudgil

{"title":"Synthesis of Precision Gold Nanoparticles Using Turkevich Method.","authors":"Jiaqi Dong, Paul L Carpinone, Georgios Pyrgiotakis, Philip Demokritou, Brij M Moudgil","doi":"10.14356/kona.2020011","DOIUrl":"https://doi.org/10.14356/kona.2020011","url":null,"abstract":"Gold nanoparticles (AuNPs) exhibit unique size-dependent physiochemical properties that make them attractive for a wide range of applications. However, the large-scale availability of precision AuNPs has been minimal. Not only must the required nanoparticles be of precise size and morphology, but they must also be of exceedingly narrow size distribution to yield accurate and reliable performance. The present study aims to synthesize precision AuNPs and to assess the advantages and limitations of the Turkevich method-one of the common chemical synthesis technique. Colloidal AuNPs from 15 nm to 50 nm in diameter were synthesized using the Turkevich method. The effect of the molar ratio of the reagent mixture (trisodium citrate to gold chloride), the scaled-up batch size, the initial gold chloride concentration, and the reaction temperature was studied. The morphology, optical property, surface chemistry, and chemical composition of AuNPs were thoroughly characterized. It was determined that the as-synthesized AuNPs between 15 nm and 30 nm exhibit well-defined size and shape, and narrow size distribution (PDI < 0.20). However, the AuNPs became more polydispersed and less spherical in shape as the particle size increased.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"37 ","pages":"224-232"},"PeriodicalIF":4.1,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14356/kona.2020011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37722047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 115

Production of Hematite Micro- and Nanoparticles in a Fluidized Bed Process—Mechanism Study 流化床工艺制备赤铁矿微颗粒及纳米颗粒的机理研究

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/kona.2020014

N. Bolay, R. Lakhal, M. Hemati

{"title":"Production of Hematite Micro- and Nanoparticles in a Fluidized Bed Process—Mechanism Study","authors":"N. Bolay, R. Lakhal, M. Hemati","doi":"10.14356/kona.2020014","DOIUrl":"https://doi.org/10.14356/kona.2020014","url":null,"abstract":"A continuous, compact and simple process was developed to synthesize micro- and nanoparticles of iron oxide. The process combines the spraying (pulverization) of an aqueous solution of iron nitrate in a fluidized bed reactor containing coarse and hot glass beads ( T = 200 °C) for the production of solids and a transported bed reactor for calcination ( T = 490 °C). The intermediate product formed in the fluidized bed reactor is 2-line ferrihydrite, while the calcination reactor allows the production of hematite micro- and nanoparticles. These particles are characterized by a narrow size distribution, a mean size of 0.5 μm, a specific surface area of 24 m 2 g –1 and a density of 4499 kg m –3 . Particles are made up of small clusters of crystallites having an average size of 47 nm and a low internal porosity (0.12). The reaction mechanism was studied using a muffle furnace and a lab convective dryer. It was found that several steps are involved leading first to the production of iron nitrate dihydrate after the removal of the solution water, as well as two and then five molecules of water of hydration. After that, the elimination of nitrate leads to the production of ferrihydrite. Finally, ferrihydrite is transformed into hematite due to the removal of residual nitrate and water of hydroxylation.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"91 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76704806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Shape Controllable Synthesis of Silver Particles by Selecting the Crystallization Routes 选择结晶路线合成形状可控的银颗粒

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020004

Jianmei Liu, Q. Lin, Yu Zhou, J. Dai, Yongsheng Han

{"title":"Shape Controllable Synthesis of Silver Particles by Selecting the Crystallization Routes","authors":"Jianmei Liu, Q. Lin, Yu Zhou, J. Dai, Yongsheng Han","doi":"10.14356/KONA.2020004","DOIUrl":"https://doi.org/10.14356/KONA.2020004","url":null,"abstract":"Classic crystallization describes a burst nucleation followed by a layer-by-layer atom deposition. The non-classic crystallization refers to particle mediated crystallization process. Different crystallization routes lead to the formation of diverse structured materials. Here we report a rational synthesis of silver particles by selecting the crystallization routes. Silver particles were synthesized by a solution reduction approach. The crystallization routes were regulated by adding amino acids to stabilize silver ions which leads to the decrease of the reduction rate. Without amino acids, silver dendrites were largely formed. With the addition of amino acids, flower-like (low concentration of amino acids) and spherical silver (high concentration of amino acid) particles were synthesized. Three kinds of amino acids were tested and the similar results were obtained. The time-dependent characterization on the evolution of silver particles showed that silver dendrites were formed by the classic atom deposition while the other two morphologies were formed by the combination of classic and non-classic crystallization. The silver particles synthesized were evaluated for ethylene epoxidation and the dendritic particles demonstrated a high selectivity.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"76 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90833951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Nanoparticle Technology for Respiratory Tract Mucosal Vaccine Delivery 纳米颗粒技术用于呼吸道粘膜疫苗递送

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020013

L. Johnson, J. Mecham, F. Quinn, A. Hickey

引用次数: 5

Rheology and Sedimentation of Aqueous Suspension of Na-montmorillonite in the Very Dilute Domain 钠蒙脱土水悬浮液在极稀域的流变性和沉降性

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/kona.2020019

Y. Adachi, Y. Kawashima, Muhamad Ezral Bin Ghazali

{"title":"Rheology and Sedimentation of Aqueous Suspension of Na-montmorillonite in the Very Dilute Domain","authors":"Y. Adachi, Y. Kawashima, Muhamad Ezral Bin Ghazali","doi":"10.14356/kona.2020019","DOIUrl":"https://doi.org/10.14356/kona.2020019","url":null,"abstract":"The scheme of DLVO theory and the concept of fractal structure of flocs applied to the suspension of montmorillonite have revealed out the unique nature of this clay dispersion. In this context, two major regimes are recognized. The first is the electrostatically dispersed regime. And the second is the coagulated regime. In the former, the formation of a diffusive electric double layer (EDL) characterized by reciprocal Debye length measured from the surface of the particle is distinctively important. Intrinsic viscosity with electroviscous effects and yield stress are interpreted by the steric presence of EDL. In the latter, the unit of transportation is a coagulated floc with finite cohesive strength. Sedimentation process reflecting these factors is carefully observed to recognize the turbulence generation by the formation of large flocs at the moment of gel collapse. Waiting time prior to gel collapse was found to be determined reflecting the pH-dependent charging behavior. By taking into account the effect pH-dependent charge, the DLVO based two regimes are further categorized into five. The developed tools can be extensively used for the system involved with different ionic species, pH, volume fraction and organic substances.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"45 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73350813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Continuous Flow Synthesis of Nanoparticles Using Supercritical Water: Process Design, Surface Control, and Nanohybrid Materials 使用超临界水连续流合成纳米颗粒:工艺设计，表面控制和纳米混合材料

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/KONA.2020002

A. Yoko, G. Seong, T. Tomai, T. Adschiri

引用次数: 25

Editor’s Preface 编者前言

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-01-10 DOI: 10.14356/kona.2020020

K. Okuyama

引用次数: 1