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Journal of Nanoscience and Nanotechnology

Sudhakar S Agnihothram, Sheryl Anne Vermudez, Lisa Mullis, Todd A Townsend, Mugimane G Manjanatha, Marli P Azevedo
Noroviruses (NoV) are the leading cause of nonbacterial gastroenteritis in humans, and replicate extensively in the human gastrointestinal (GI) tract. Silica (also known as silicon dioxide, SiO2) nanoparticles (NPs) used in processed foods, dairy products, and beverages also accumulate in the GI tract. We investigated the effect of silica NPs on NoV replication and host cell response during virus infection, using murine norovirus (MNV-1) infection of RAW 264.7 murine macrophages. Pretreatment with 10 μg/ml silica significantly reduced the viability of macrophages, but no cumulative effects on viability of macrophages were observed with MNV-1 infection...
July 2016: Journal of Nanoscience and Nanotechnology
Maila Castellano, Riccardo Cantù, Marco Mauri, Enrico Marsano, Silvia Vicini
Porous membranes based on polydimethylsiloxane fibers with titanium dioxide nanoparticles were developed to be used as photocatalysts. PDMS was chosen as a support for the titania because of its high thermal and chemical resistance to the photodegradative effect of the TiO2. Porous membranes are produced via electrospinning using three different apparatus configurations. The photocatalytic activity analysis shows that the best results are obtained dispersing the titanium oxide on the surface of the polymer using an electrospinning configuration which involves the use of two needles...
June 2016: Journal of Nanoscience and Nanotechnology
Mi-Kyung Kim, Jeong-A Lee, Mi-Rae Jo, Soo-Jin Choi
Inorganic nanoparticles have been widely applied to various industrial fields and biological applications. However, the question as to whether nanoparticles are more efficiently absorbed into the systemic circulation than bulk-sized materials remains to be unclear. In the present study, the physico-chemical and dissolution properties of the most extensively developed inorganic nanoparticles, such as silica (SiO2), titanium dioxide (TiO2), and zinc oxide (ZnO), were analyzed, as compared with bulk-sized particles...
June 2016: Journal of Nanoscience and Nanotechnology
Byeol Kim, Jin Seok Lee
Anodic aluminum oxide (AAO), with a self-ordered hexagonal array, is important for various applications in nanofabrication including as the fabrication of nanotemplates and other nanostructures. With the consideration, there have been many efforts to control the characteristic parameters of porous anodic alumina by adjustment of the anodizing conditions such as the electrolyte, temperature, applied potential, and Al purity. In particular, impurities in Al are changing the morphology of an alumina film; however, the formation mechanism has not yet been explained...
June 2016: Journal of Nanoscience and Nanotechnology
Hong Tao, Nhat-Thien Nguyen, Xiao-Hui Hei, Cong Nguyen Nguyen, Hsiao-Hsin Tsai, I-Cheng Chang, Chang-Tang Chang
Di-n-butyl phthalate (DBP) is a type of phthalate ester. In recent years, an increasing number of studies have examined the removal of DBP. In this study we use a composite material of N-Ti/13X/MCM-41, synthesized by nitrogen, molecular sieve 13X, tetrabutyl orthotitanate and tetraethyl orthosilicate as raw materials, CTAB as a structural template and tetrabutyl titanate and urea under hydrothermal conditions. The optimized experimental conditions, such as the amount of material, reaction time, pH value and initial concentration were tested...
June 2016: Journal of Nanoscience and Nanotechnology
Xiaowen Wang, Jumei Zhou, Benke Chen, Zhenghai Tang, Jieying Zhang, Liya Li, Jintian Tang
In order to investigate whether cell organelle targeting peptide can transport magnetic nanoparticles (MNPs) into specific cell organelle, peptides bearing nuclear localization signal (NLS) or mitochondria targeting sequences were coagulated to MNPs. In vitro cytotoxicity study on the human liver cancer cells (HepG2) was tested by using MTT assay. Sub-cellular location of each peptide modified MNP (PEP-MNPs) was observed by transmission electron microscopy (TEM). The uptake of HepG2 cells growing in PEP-MNPs was measured by using ICP-OES...
June 2016: Journal of Nanoscience and Nanotechnology
Zeeshan Ur Rehman, Si-Nae Heo, Hyeon Ji Cho, Bon Heun Koo
This report is devoted to the synthesis of high quality nanorods using spin coating technique for seed layer growth. Effect of different parameter i.e., spins coating counts, spin coating speed, and the effect of temperature during the drying process was analyzed. Hot plate and furnace technique was used for heating purpose and the difference in the morphology was carefully observed. It is worthy to mention here that there is a substantial effect of all the above mentioned parameters on the growth and morphology of the ZnO nanostructure...
June 2016: Journal of Nanoscience and Nanotechnology
Yingyot Poo-Arporn, Rungtiva Palangsuntikul
The in situ X-ray absorption near edge structure (XANES) measurement and linear combination fitting were applied to monitor phase transformation of titanium dioxide. In this study, TiO2 (TiSG) was prepared by a sol-gel method.using titanium isopropoxide as a precursor. At low preparation temperature, the results revealed the formation of an amorphous structure. To obtain the anatase phase, the calcination at 843 K was necessary. Using phase fraction plot, TiO2 phase-transition can be observed at temperatures between 748 and 778 K and remain unchanged at 873 K...
June 2016: Journal of Nanoscience and Nanotechnology
Marzena Szwed, Ralph Santos-Oliveira
In the present study we report the interactions of four types of different nanoparticles with normal peripheral blood mononuclear cells. To our research we chose four types of nanoparticles which possess therapeutic properties (Trastuzumab, ethylene-diamine-tetra-methylene-phosphonic for breast and bone cancers treatment, respectively) or can be used as the ingredients of sun-protected films (nanoemulsions with or without chitosan). By carrying out XTT survival assay we observed that both types of tested nanoemulsions suppressed the proliferation of normal lymphocytes...
June 2016: Journal of Nanoscience and Nanotechnology
Ronaldo S Sasaki, Luiz H C Mattoso, Márcia Regina de Moura
Nanocomposites are being extremely investigated to provide packaging with interesting characteristics for packages. Because of essential oils' natural occurrence and antibacterial activity, they are considered as an alternative for synthetic additives in the food industry. In this paper, we studied an edible bionanocomposite film made up of pectin and clove essential oil nanoemulsion for application as edible package. Mechanical properties, water vapor permeability (WVP), and antibacterial activity were analyzed...
June 2016: Journal of Nanoscience and Nanotechnology
Amélia S F Santos, Marcelo A Pereira-da-Silva, Juliano E Oliveira, Luiz H C Mattoso, Eliton S Medeiros
Studies on sonochemical hydrolysis of cellulose have been suggested as an alternative route to obtaining cellulose nanoparticles. In this work, the potential use of acid hydrolysis assisted by sonication to obtain cellulose whiskers was studied. Parameters such as acid concentration, hydrolysis time and temperature were investigated to evaluate their effect on the morphological properties of the nanowhiskers, as compared to the conventional extraction process by acid hydrolysis with mechanical stirring. Morphology and degree of crystallinity of the nanowhiskers were studied by atomic force microscopy (AFM) and X-ray diffraction (XRD)...
June 2016: Journal of Nanoscience and Nanotechnology
Alexsandro Mendes Zimer, Maria Manuela P Machado, Lázaro José Dalla Costa Júnior, Priscila Tomie Leme Ike, Iemma Mônica R C, Cíntia Fumi Yamamoto, Cauê Favero Ferreira, Dulce H F Souza, Cauê Ribeiro de Oliveira, Ernesto Chaves Pereira
In this paper, we present the optimization of porous anodic alumina membranes for ultrafiltration prepared by anodically oxidized aluminum foils. The membranes were characterized by field-emission scanning electron microscopy to measure the pore diameter and the membrane thicknesses. The liquid fluxes were estimated through gas permeability measurements using Darcy's and Forchheimerś equations. A 2(3) factorial design we used to optimize the membrane properties: pore diameter, membrane thickness, and liquid flux using as control variables the applied current density, solution composition and concentration...
June 2016: Journal of Nanoscience and Nanotechnology
Seung Min Yoo, Youn-Kyoung Baek, SunHaeRa Shin, Ju-Hyun Kim, Hee-Tae Jung, Yang-Kyu Choi, Sang Yup Lee
We herein describe the development of a single-walled carbon nanotube (SWNT)-based electrical biosensor consisting of a two-terminal resistor, and report its use for the specific, label-free detection of pathogenic bacteria via changes in conductance. The ability of this biosensor to recognize different pathogenic bacteria was analyzed, and conditions were optimized with different probe concentrations. Using this system, the reference strains and clinical isolates of Staphylococcus aureus and Escherichia coli were successfully detected; in both cases, the sensor showed a detection limit of 10 CFU...
June 2016: Journal of Nanoscience and Nanotechnology
Wei Liu, Fangdi Wei, Guanhong Xu, Yanzi Wu, Chunting Hu, Quan Song, Jing Yang, Qin Hu
In the present paper, a simple and rapid "turn-on" fluorescence sensor for Zn2+ based on ethylene diamine tetraacetic acid (EDTA) etched CdTe quantum dots (QDs) was developed. First, the initial bright fluorescence of mercaptopropionic acid (MPA) capped CdTe QDs was effectively quenched by EDTA, and then the presence of Zn2+ could "turn on" the weak fluorescence of QDs quenched by EDTA due to the formation of ZnS passivation shell. The increase of fluorescence intensity of EDTA etched QDs was found to be linear with the concentration of Zn2+ added...
June 2016: Journal of Nanoscience and Nanotechnology
Haowen Yang, Ming Liu, Bingcong Zhou, Yan Deng, Nongyue He, Hesheng Jiang, Yafen Guo, Ganqiu Lan, Qinyang Jiang, Xiurong Yang, Zhiyang Li
Chinese Bama minipigs could be potential donors for the supply of xenografts because they are genetically stable, highly inbred, and inexpensive. However, porcine endogenous retrovirus (PERV) is commonly integrated in pig genomes and could cause a cross-species infection by xenotransplantation. For screening out the pigs with low copy numbers of PERV proviruses, we have developed a novel semiquantitative analysis approach based on magnetic nanoparticles (MNPs) and chemiluminescence (CL) for estimating relative copy numbers (RCNs) of PERV proviruses in Chinese Bama minipigs...
June 2016: Journal of Nanoscience and Nanotechnology
Burak Aday, Handan Pamuk, Muharrem Kaya, Fatih Sen
Graphene oxide as a highly stable, reusable, isolable, and efficient catalyst has been used for the first time for the synthesis of acridinedione derivatives from dimedone, aromatic aldehydes and various amines with great catalytic performance. One pot synthesis of acridinedione compounds were performed using highly efficient graphene oxide.
June 2016: Journal of Nanoscience and Nanotechnology
Xiaohong Wang, Wuxing Zhang, Yunhui Huang, Tian Xia, Yongfu Lian
Lithium iron phosphate (LiFePO4) has been evaluated as the most promising cathode material for the next generation lithium-ion batteries because of its high operating voltage, good cycle performance, low cost, and environmentally friendly safety. However, pure LiFePO4 shows poor reversible capacity and charge/discharge performance at high current density. Many methods including optimization of particle size, introduction of coating carbon and conductive polymer, and the doping of metal and halogen ions have been developed to improve its electrochemical performance...
June 2016: Journal of Nanoscience and Nanotechnology
Mohammad Mahbub Rabbani, Seong Baek Yang, Soo-Jin Park, Weontae Oh, Jeong Hyun Yeum
Pullulan/Chitosan oligosaccharide (COS)/Montmorillonite (MMT) hybrid nanofibers were electrospun from their aqueous solution using different Pullulan/COS mass ratios and variable amounts of MMT. The effects of Pullulan/COS mass ratios and MMT contents on the morphologies and properties of PulluIan/COS/MMT hybrid nanofibers were investigated. The obtained nanofibers were characterized with field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermo gravimetric analysis (TGA), and tensile strength measurement...
June 2016: Journal of Nanoscience and Nanotechnology
Jeong Su Park, Dahyun Lee, Ji Yeon Park, Hyo Jin Lee, Jin-Seok Kim, Jin Seok Lee
The nanotopological cues are emerging field of in vivo study, because it stimulates alteration of cell morphology and cell behavior such as adhesion, proliferation, differentiation, apoptosis and migration. However, it has not studies nanosurface affected cancer cell behavior, therefore, in this study, we determined that effects the silica nanobeads used as nanotopological tools on cancer cells. For synthesis of silica beads, we made it using stober method and basic amino acid (L-arginine) instead of NH4OH...
June 2016: Journal of Nanoscience and Nanotechnology
Fanghong Yang, Zhixiang Jiang, Yanping Miao, Ping Yang
We prepared CdS nanowires with small diameter (2.9 nm) and a large aspect ratio (more than 60) via a seed growth method. Wurtzite CdS seeds were firstly obtained via an organic synthesis at 310 degrees C. CdS nanowires with a single-crystal wurtzite structure and grown along the [0001] (c-axis) were further created through controlling the growth process. The injection of precursors plays an important role for getting a large respect ratio. The average size of the seeds is 2.9 nm. The growth along c-axis occurred during the preparation of the nanowires...
June 2016: Journal of Nanoscience and Nanotechnology
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