纳米粒子(英文)最新文献_第8页

Performance of Local Clay-Titanium Dioxide Core-Shell Extender Pigments in Alkyd Paints 局部粘土-二氧化钛核-壳填充颜料在醇酸漆中的性能

纳米粒子(英文) Pub Date : 2016-02-04 DOI: 10.4236/ANP.2016.51011

C. Ewulonu, I. Igwe, G. N. Onyeagoro

{"title":"Performance of Local Clay-Titanium Dioxide Core-Shell Extender Pigments in Alkyd Paints","authors":"C. Ewulonu, I. Igwe, G. N. Onyeagoro","doi":"10.4236/ANP.2016.51011","DOIUrl":"https://doi.org/10.4236/ANP.2016.51011","url":null,"abstract":"The performance of local clay-titanium dioxide core-shell extender pigments in alkyd paints has been studied. The physico-mechanical properties of the prepared alkyd paints were evaluated according to ASTM measurements. The effects of various environmental and corrosive factors on the paints were also studied. The study showed that the alkyd paint samples formulated using the core-shell pigments generally had low specific gravity (1.30 – 1.38), an indication that more of the core-shell pigments can be incorporated into the alkyd paints with considerable cost savings. The dry film thicknesses of the paint samples falls within 0.24 - 0.39 mm, suggesting that the samples will perform well as anticorrosive coatings and their adhesion properties are generally good, showing that they can withstand abrasive and corrosive agents. The core-shell extender pigments formulated paint samples were observed to exhibit the best dust-free, tack-free, and through dry times compared to TiO2 paint formulation. The formulated paint samples generally performed well on exposure to rain and sunlight as well as in distilled water, 2% Na2CO3, and 2% H2SO4 with only TiO2 paint formulation exhibiting rust. The good paint performance characteristics obtainable with the core-shell extender pigments are enough evidence to justify their utilization in the surface coatings industry. The performances of these core-shell extender pigments in alkyd paints have shown that they combine the properties of both the clays and titanium dioxide, and have the potential to overcome their disadvantages.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"05 1","pages":"90-102"},"PeriodicalIF":0.0,"publicationDate":"2016-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70338004","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

A Review on Metal Nanostructures: Preparation Methods and Their Potential Applications 金属纳米结构研究进展:制备方法及其应用前景

纳米粒子(英文) Pub Date : 2016-02-04 DOI: 10.4236/ANP.2016.51004

U. Qazi, R. Javaid

引用次数: 55

Biotoxicity of CdS/CdSe Core-Shell Nano-Structures CdS/CdSe核壳纳米结构的生物毒性

纳米粒子(英文) Pub Date : 2016-02-04 DOI: 10.4236/ANP.2016.51001

Sreenu Bhanoth, Anuraj S. Kshirsagar, P. Khanna, Aakriti Tyagi, A. Verma

引用次数: 7

Comparative Study of Removal of Hexavalent Chromium from Water Using Metal Oxide Nanoparticles 金属氧化物纳米颗粒去除水中六价铬的比较研究

纳米粒子(英文) Pub Date : 2016-02-04 DOI: 10.4236/ANP.2016.51008

V. Bhusari, Rashmi V. Dahake, S. Rayalu, A. Bansiwal

引用次数: 26

Synthesis and Characterization of Ag Nanoparticles Addition on BPSCCO Superconducting Thin Films 银纳米粒子在BPSCCO超导薄膜上的合成与表征

纳米粒子(英文) Pub Date : 2016-02-01 DOI: 10.4236/ANP.2016.51009

S. Oboudi, M. Mustafa

引用次数: 11

Influence of Chitosan Binder on the Adhesion of Silver Nanoparticles on Cotton Fabric and Evaluation of Antibacterial Activity 壳聚糖粘结剂对纳米银在棉织物上粘附的影响及抗菌活性评价

纳米粒子(英文) Pub Date : 2015-11-09 DOI: 10.4236/ANP.2015.44011

N. Q. Hien, Dang Van Phu, N. N. Duy, L. Quoc, Nguyen Thi Kim Lan, H. T. D. Quy, H. T. Van, P. Diem, Tran Thai Hoa

{"title":"Influence of Chitosan Binder on the Adhesion of Silver Nanoparticles on Cotton Fabric and Evaluation of Antibacterial Activity","authors":"N. Q. Hien, Dang Van Phu, N. N. Duy, L. Quoc, Nguyen Thi Kim Lan, H. T. D. Quy, H. T. Van, P. Diem, Tran Thai Hoa","doi":"10.4236/ANP.2015.44011","DOIUrl":"https://doi.org/10.4236/ANP.2015.44011","url":null,"abstract":"Colloidal silver nanoparticles (AgNPs) with particle size less than 10 nm and concentration of 2 mM/L (~200 mg/L) were synthesized by gamma Co-60 ray irradiation of Ag+/chitosan solutions with different chitosan concentration of 0.5%, 1% and 2% (w/v). Incorporation of AgNPs onto cotton fabric was carried out by padding method with 100% wet pick-up. The content of AgNPs deposited on cotton fabric and released from cotton fabric after repeated washing was determined by inductively couple plasma-atomic emission spectroscopy (ICP-AES). The results indicated that cotton/AgNPs fabric made from padding into AgNPs solution with 0.5% - 1% chitosan was the best one of AgNPs adhesion ability on cotton fabric. Results on antibacterial activity against S. aureus showed that cotton/AgNPs fabric with AgNPs content more than 100 mg/kg exhibited highly antibacterial activity (η > 98%). The mechanical property (tensile strength and elongation) of cotton/AgNPs fabrics was almost unchanged in comparison with untreated cotton fabric. Thus, the resultant cotton/AgNPs fabric with highly antibacterial activity can be potentially used as bed drapes and/or patient uniforms in hospitals, etc.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"98-106"},"PeriodicalIF":0.0,"publicationDate":"2015-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70338332","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: 9

Thermal Stability and Hot Carrier Dynamics of Gold Nanoparticles of Different Shapes 不同形状金纳米颗粒的热稳定性和热载流子动力学

纳米粒子(英文) Pub Date : 2015-11-09 DOI: 10.4236/ANP.2015.44010

Y. Attia, T. Altalhi, A. Gobouri

引用次数: 9

Synthesis and Characterization of Bimetallic Gold-Silver Core-Shell Nanoparticles: A Green Approach 双金属金-银核-壳纳米粒子的合成与表征:绿色途径

纳米粒子(英文) Pub Date : 2015-11-09 DOI: 10.4236/ANP.2015.44013

A. Calagua, H. Alarcon, F. Paraguay, Juan M. Rodriguez

{"title":"Synthesis and Characterization of Bimetallic Gold-Silver Core-Shell Nanoparticles: A Green Approach","authors":"A. Calagua, H. Alarcon, F. Paraguay, Juan M. Rodriguez","doi":"10.4236/ANP.2015.44013","DOIUrl":"https://doi.org/10.4236/ANP.2015.44013","url":null,"abstract":"Bimetallic gold-silver core-shell nanoparticles were prepared by chemical reduction in aqueous solution, following a method that was friendly to the environment, allowing us to use this for medicinal purposes. Gold nanoparticles were synthesized, and silver cations were then reduced on the nanoparticles. Using the optical properties of metallic nanoparticles, surface plasmon resonance was determined by UV-Vis spectroscopy, and the values obtained for gold and silver were approximately 520 nm and 400 nm in wavelength, respectively. The absorption peaks of the surface plasmon band show a clear red-shift due to size effect in the case of the silver surface, and a plasmon coupling effect, in the case of gold. To obtain a better understanding of the coating conditions, high resolution transmission electron microscopy was used. The average hydrodynamic size and the size distribution of the synthesized nanoparticles were obtained by dynamic light scattering. The development of this process, which is benign for the environment, opens the possibility for many applications in the areas of renewable energy, medicine and biology.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"116-121"},"PeriodicalIF":0.0,"publicationDate":"2015-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70338036","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: 17

Oral PTCTS (Particulated Transialidase) Removes Serum Microparticles and Decreases Inflammation in Atherosclerotic Plaques of Rabbits 口服PTCTS(颗粒过酰胺酶)可去除兔动脉粥样硬化斑块中的血清微粒并减少炎症

纳米粒子(英文) Pub Date : 2015-11-09 DOI: 10.4236/ANP.2015.44012

Shérrira M Garavelo, J. Pereĭra, N. Wadt, M. Reis, R. Ikegami, J. Kawakami, A. Agouni, S. P. Palomino, D. Abdalla, M. Higuchi

{"title":"Oral PTCTS (Particulated Transialidase) Removes Serum Microparticles and Decreases Inflammation in Atherosclerotic Plaques of Rabbits","authors":"Shérrira M Garavelo, J. Pereĭra, N. Wadt, M. Reis, R. Ikegami, J. Kawakami, A. Agouni, S. P. Palomino, D. Abdalla, M. Higuchi","doi":"10.4236/ANP.2015.44012","DOIUrl":"https://doi.org/10.4236/ANP.2015.44012","url":null,"abstract":"Background: Previous studies showed that atherosclerotic plaque vulnerability was related with microparticles (MPs)-vesicles larger than 100 nm, which released MMP9 collagenase. In our previous study, intramuscular injection of a new drug (PTCTS) normalized oxidized LDL serum levels and reduced rabbit atherosclerosis. Now, we studied administration of oral PTCTS in order to clarify anti-atherosclerotic mechanism of action, analyzing if the treatment removed MPs containing ox-LDL and Mycoplasma pneumoniae antigens and improved the immune response. Methods: We compared two groups of rabbits. Control group (CG, n = 6)—1% cholesterol enriched diet for 12 weeks; Treated group (TG, n = 8)—1% cholesterol enriched diet for 12 weeks with administration of PTCTS (400 μl/day) during the last 6 weeks of diet. The animals had their blood collected, in three different phases of the protocol before being fed with hypercholesterolemic diet, before being treated with water or PTCTS and at the moment of sacrifice. The serum was submitted to immunofluorescence technique to evaluate the quantity of microparticles marked with antibodies against Mycoplasma pneumoniae and ox-LDL. A fragment of aorta was submitted to immunohistochemical detection of antigens from MMP9, ox-LDL, NF-κB and IL-1β. Results: PTCTS showed significant reduction in MMP-9 (P = 0.001) and a tendency of reducing IL-1β (P = 0.09) in the aortic plaques compared with CG. In the serum, PTCTS was able to remove microparticles containing antigen of ox-LDL (P = 0.004) and Mycoplasma pneumoniae (P β and mycoplasma, as well as a better stabilization of the atheromatous plaque by reducing levels of MMP-9, avoiding plaque rupture, without causing mortality or toxicity.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"107-115"},"PeriodicalIF":0.0,"publicationDate":"2015-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70338402","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

Preparation and Characterization of Novel Drug-Inserted-Montmorillonite Chitosan Carriers for Ocular Drug Delivery 新型蒙脱土壳聚糖眼部给药载体的制备与表征

纳米粒子(英文) Pub Date : 2015-06-17 DOI: 10.4236/ANP.2015.43009

Dongzhi Hou, Ruyi Gui, Sheng Hu, Yi Huang, Zu-yong Feng, Q. Ping

{"title":"Preparation and Characterization of Novel Drug-Inserted-Montmorillonite Chitosan Carriers for Ocular Drug Delivery","authors":"Dongzhi Hou, Ruyi Gui, Sheng Hu, Yi Huang, Zu-yong Feng, Q. Ping","doi":"10.4236/ANP.2015.43009","DOIUrl":"https://doi.org/10.4236/ANP.2015.43009","url":null,"abstract":"The objective of the study was to investigate the potential of montmorillonite as a sustained carrier \u0000in the preparation of drug-loaded nanoparticles for prolonged ocular application. Nanoparticles \u0000were prepared by ionic gelation of chitosan with sodium tripolyphosphate (TPP). Betaxolol \u0000hydrochloride (BH) was applied as a model drug. TG, FT-IR, TEM, DLS and XRD have been employed \u0000in the characterization of drug-encapsulated chitosan-montmorillonite/TPP nanoparticles \u0000(CS-MMT/TPP NPs). TEM images showed that the particles were spherical in shape and had a \u0000rough surface. The size range of the nanoparticles was between 338 and 585 nm with positive zeta \u0000potential values from 24 mV to 36 mV and encapsulation efficiency values ranging from 12.27% to \u000050.92%. In vitro sustained drug release was observed with the BH-loaded nanoparticles in artificial \u0000tears (pH 7.4). The results of FT-IR, TG and XRD showed that the drug was coated with CSMMT/ \u0000TPP NPs. In the mucoadhesion studies, an interaction was found between drug-loaded CSMMT/ \u0000TPP NPs and mucin, which could enhance precorneal residence time and hence facilitate an \u0000effective sustained release. The optimized formulation was determined to be non-irritant and tolerable \u0000by modified Draize test. Therefore, the BH-loading CS-MMT/TPP NPs developed are a \u0000promising carrier for controlled drug delivery to the eye.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"70-84"},"PeriodicalIF":0.0,"publicationDate":"2015-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337751","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: 47