نتایج جستجو برای: ag tio2 nps

تعداد نتایج: 74959  

2017
Andrea León Patricia Reuquen Carolina Garín Rodrigo Segura Patricio Vargas Paula Zapata Pedro A. Orihuela

The aim of this study was to prepare a novel targeting drug delivery system for 2-Methoxyestradiol (2ME) in order to improve the clinical application of this antitumor drug. It is based in nanoparticles (NPs) of titanium dioxide (TiO2) coated with polyethylene glycol (PEG) and loaded with 2ME. A complete IR and Raman characterization have been made to confirm the formation of TiO2–PEG–2ME compo...

2014
Angela Ivask Imbi Kurvet Kaja Kasemets Irina Blinova Villem Aruoja Sandra Suppi Heiki Vija Aleksandr Käkinen Tiina Titma Margit Heinlaan Meeri Visnapuu Dagmar Koller Vambola Kisand Anne Kahru

The concept of nanotechnologies is based on size-dependent properties of particles in the 1-100 nm range. However, the relation between the particle size and biological effects is still unclear. The aim of the current paper was to generate and analyse a homogenous set of experimental toxicity data on Ag nanoparticles (Ag NPs) of similar coating (citrate) but of 5 different primary sizes (10, 20...

Journal: :Nanotechnology 2011
Binyu Yu Kar Man Leung Qiuquan Guo Woon Ming Lau Jun Yang

TiO2 photocatalysts have been found to kill cancer cells, bacteria and viruses under mild UV illumination, which offers numerous potential applications. On the other hand, Ag has long been proved as a good antibacterial material as well. The advantage of Ag-TiO2 nanocomposite is to expand the nanomaterial's antibacterial function to a broader range of working conditions. In this study neat TiO2...

2016
Sunita Rao Gyan Singh Shekhawat

This study elaborates the consequences of oxidative stress caused by copper oxide (CuO) and titanium dioxide (TiO2) nanoparticles (NPs) in Brassica juncea. Effect of these two NPs on plant physiology, reactive oxygen scavenging enzyme system (ascorbate peroxidase, catalase, superoxide dismutase), proline content and lipid peroxidation has been estimated in leaves as well as root tissues. Bioacc...

Journal: :Toxicology in vitro : an international journal published in association with BIBRA 2014
Guillaume Côté-Maurais Jacques Bernier

Immunotoxicity studies of nanoparticles on T cells addressed their effects on activation by T antigen receptor, but have neglected the regulation of proliferation by IL-2. In this study, the IL-2-dependent T lymphoblastoid WE17/10 cell line was used to compare silver (Ag-NPs) and fullerene (C60-NPs) nanoparticles' toxicity and evaluate whether these NPs could interfere with IL-2-dependent proli...

Journal: :The Journal of chemical physics 2006
Yuling Wang Hongjun Chen Shaojun Dong Erkang Wang

A sandwich structure consisting of Ag nanoparticles (NPs), p-aminothiophenol (p-ATP) self-assembled monolayers (SAMs), and Ag NPs was fabricated on glass and characterized by surface enhanced Raman scattering (SERS). The SERS spectrum of a p-ATP SAM in such sandwich structure shows that the electromagnetic enhancement is greater than that on Ag NPs assembled on glass. The obtained enhancement f...

Journal: Nanomedicine Journal 2017
Fatemeh Nakhjiri Mahboubeh Mirhosseini, Malihe Alsadat Mozaheb

Objective(s): Silver nanoparticles (Ag NPs) are not only specific physical and chemical properties but also are considered for their antibacterial activity and ecofriendly.Materials and Methods:In this study a simple, cost effective biologically method for Ag+reducing to Ag NPs using Echinops extractas a stabilizer, and reducing agent.Ag NPs were analyzed using UV-Vis spectrometry,TEM, XRD and ...

Journal: :iranian journal of parasitology 0
mohammad reza lashkarizadeh dept. of surgery and the research center for tropical and infectious diseases, kerman university of medical sciences, kerman, iran. keivan asgaripour dept. of surgery and the research center for tropical and infectious diseases, kerman university of medical sciences, kerman, iran. ebrahim saedi dezaki research center for hydatid disease in iran, kerman university of medical sciences, kerman, iran. majid fasihi harandi research center for hydatid disease in iran, kerman university of medical sciences, kerman, iran.

background: haemonchosis has a negative effect on the farming industry throughout the world, especially in the tropic and sub-tropic countries. the present study was carried out to differentiate haemonchus species from its main hosts in iran, including sheep, goat and camel.   methods: the identification took place based on the morphometrics of the spic-ules and molecular characters. two hundre...

2014
Muhammad Ajaz Hussain Abdullah Shah Ibrahim Jantan Muhammad Nawaz Tahir Muhammad Raza Shah Riaz Ahmed Syed Nasir Abbas Bukhari

BACKGROUND Green synthesis of nanomaterials finds the edge over chemical methods due to its environmental compatibility. Herein, we report green synthesis of silver nanoparticles (Ag NPs) mediated with dextran. Dextran was used as a stabilizer and capping agent to synthesize Ag NPs using silver nitrate (AgNO3) under diffused sunlight conditions. RESULTS UV-vis spectra of as synthesized Ag nan...

2010
Meghan E. Samberg Steven J. Oldenburg Nancy A. Monteiro-Riviere

INTRODUCTION Products using the antimicrobial properties of silver nanoparticles (Ag-nps) may be found in health and consumer products that routinely contact skin. OBJECTIVES This study was designed to assess the potential cytotoxicity of Ag-nps in human epidermal keratinocytes (HEKs) and their inflammatory and penetrating potential into porcine skin in vivo. MATERIALS AND METHODS We used e...

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