نتایج جستجو برای: nanoparticles nps

تعداد نتایج: 111222  

2016
Chao Zhang Lin Zhang Youcai Zhang Na Sun Shaoyi Jiang Timothy J. Fujihara Yan Sun

An antithrombotic nanoconjugate was designed in which a designed biomimetic peptide LWWNSYY was immobilized to the surface of poly(glycidyl methacrylate) nanoparticles (PGMA NPs). Our previous work has demonstrated LWWNSYY to be an effective inhibitor of integrin α2β1-collagen interaction and subsequent thrombus formation, however its practical application suffered from the formation of cluster...

2016
Syed Rahin Ahmed Sangjin Oh Rina Baba Hongjian Zhou Sungu Hwang Jaebeom Lee Enoch Y. Park

The demand for biologically compatible and stable noble metal nanoparticles (NPs) has increased in recent years due to their inert nature and unique optical properties. In this article, we present 11 different synthetic methods for obtaining gold nanoparticles (Au NPs) through the use of common biological buffers. The results demonstrate that the sizes, shapes, and monodispersity of the NPs cou...

2013
Haliza Katas Maria Abdul Ghafoor Raja Kai Leong Lam

Chitosan nanoparticles (CS NPs) exhibit good physicochemical properties as drug delivery systems. The aim of this study is to determine the modulation of preparative parameters on the physical characteristics and colloidal stability of CS NPs. CS NPs were fabricated by ionic interaction with dextran sulphate (DS) prior to determination of their storage stability. The smallest CS NPs of 353 ± 23...

2013
Cristina Fernández-Blanco Álvaro Colina Aránzazu Heras

A new controlled current multipulse methodology has been developed to modify the screen-printed electrode surface with silver nanoparticles (AgNPs). Spectroelectrochemistry has provided not only information about the type of nanoparticles (NPs) deposited on the electrode surface, but also about the electrosynthesis process. Small NPs without plasmon band are initially generated. Next, these nuc...

2015
Vijay Patel David Berthold Pravin Puranik Miroslav Gantar

The aim of this study was to assess the ability of selected strains of cyanobacteria and microalgae to biosynthesize silver nanoparticles (Ag-NPs) by using two procedures; (i) suspending the live and washed biomass of microalgae and cyanobacteria into the AgNO3 solution and (ii) by adding AgNO3 into a cell-free culture liquid. Ag-NPs were biosynthesized by 14 out of 16 tested strains. In most o...

2015
Min Shi Liang Cheng Zubin Zhang Zhuang Liu Xinliang Mao

Magnetic iron oxide nanoparticles (NPs) are emerging as novel materials with great potentials for various biomedical applications, but their biological activities are largely unknown. In the present study, we found that ferroferric oxide nanoparticles (Fe3O4 NPs) induced autophagy in blood cells. Both naked and modified Fe3O4 NPs induced LC3 lipidation and degraded p62, a monitor of autophagy f...

Journal: :Environmental pollution 2016
Julia Maxi Kanold Jiabin Wang Franz Brümmer Lidija Šiller

The presence of nanoparticles in many industrial applications and daily products is making it nowadays crucial to assess their impact when exposed to the environment. Metallic nickel nanoparticles (Ni NPs) are of high industrial interest due to their ability to catalyze the reversible hydration of CO2 to carbonic acid at ambient conditions. We characterized metallic Ni NPs by XRD, HRTEM and EDS...

2013
Petr SUCHOMEL Ales PANACEK Robert PRUCEK Radek ZBORIL Libor KVITEK

This work is aimed at preparation of small silver nanoparticles (Ag NPs) with various sizes using two-step preparation method. The silver bromide nanoparticles were prepared in the first step and they were reduced to metal silver nanoparticles in the second step. Size of prepared silver nanoparticles was controlled by using of several modifiers. Two surfactants (SDS and Tween 80) and two natura...

Journal: :Journal of materials chemistry. B 2015
Min Zhou Shaoli Song Jun Zhao Mei Tian Chun Li

Copper sulfide nanoparticles (CuS NPs) have been reported as a single-compartment theranostic nanosystem to visualize and treat tumors simultaneously. However, few studies have investigated the in vivo tumor-targeted delivery of this class of nanoparticles. In this study, we introduced a tumor-specific targeting ligand, folic acid (FA), onto the surface of CuS NPs as a model system to demonstra...

Journal: :Journal of microencapsulation 2014
Quazi T H Shubhra Andrea F Kardos Tivadar Feczkó Hana Mackova Daniel Horák Judit Tóth György Dósa János Gyenis

PLGA (poly d,l-lactic-co-glycolic acid) nanoparticles (NPs) encapsulating magnetite nanoparticles (MNPs) along with a model drug human serum albumin (HSA) were prepared by double emulsion solvent evaporation method. This Part I will focus on size and size distribution of prepared NPs, whereas encapsulation efficiency will be discussed in Part II. It was found that mean hydrodynamic particle siz...

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