نتایج جستجو برای: nano toxicity

تعداد نتایج: 167521  

2015
Cheol-Hong Lim

In recent years, the use of both nano- and micro-sized lanthanum has been increasing in the production of optical glasses, batteries, alloys, etc. However, a hazard assessment has not been performed to determine the degree of toxicity of lanthanum. Therefore, the purpose of this study was to identify the toxicity of both nano- and micro-sized lanthanum oxide in cultured cells and rats. After id...

Journal: :Toxicology and applied pharmacology 2014
Andrea L Armstead Christopher B Arena Bingyun Li

Tungsten carbide cobalt (WC-Co) has been recognized as a workplace inhalation hazard in the manufacturing, mining and drilling industries by the National Institute of Occupational Safety and Health. Exposure to WC-Co is known to cause "hard metal lung disease" but the relationship between exposure, toxicity and development of disease remain poorly understood. To better understand this relations...

Journal: :Journal of applied toxicology : JAT 2014
Baoyong Sha Wei Gao Shuqi Wang Xingchun Gou Wei Li Xuan Liang Zhiguo Qu Feng Xu Tian Jian Lu

Extensive studies have shown that titanium dioxide (TiO2 ) nanomaterials (NMs) can cause toxicity in vitro and in vivo under normal conditions. However, an adverse effect induced by nano-TiO2 in many diseased conditions, typically characterized by oxidative stress (OS), remains unknown. We investigated the toxicity of nano-TiO2 in rat liver cells (BRL-3A) and Sprague-Dawley (SD) rat livers unde...

2013
Farzin Heravi Mohammad Ramezani Maryam Poosti Mohsen Hosseini Arezoo Shajiei Farzaneh Ahrari

Background and aims. Incorporation of nano-particles to orthodontic bonding systems has been considered to prevent enamel demineralization around appliances. This study investigated cytotoxicity of Transbond XT adhesive containing 1 wt% titanium dioxide (TiO2) nano-particles. Materials and methods. Ten composite disks were prepared from each of the conventional and TiO2-containg composites and ...

2016
Chao Wang Jianjun Lu Le Zhou Jun Li Jiaman Xu Weijian Li Lili Zhang Xiang Zhong Tian Wang

Zinc oxide nanoparticles (nano-ZnOs) are widely used and possess great potentials in agriculture and biomedicine. It is inevitable for human exposure to these nanoparticles. However, no study had been conducted to investigate the long term effects of nano-ZnOs. This study aimed at investigating effects of nano-ZnOs on development, zinc metabolism and biodistribution of minerals (Zn, Fe, Cu, and...

2012
Xiaoxiao Chen Xing Zhu Rui Li Hanchao Yao Zhisong Lu Xu Yang

With the rapid development of nanotechnology and widespread use of nanoproducts, concerns have arisen regarding the ecotoxicity of these materials. In this paper, the photosynthetic toxicity and oxidative damage induced by nanoFe3O4 on a model organism, Chlorella vulgaris (C. vulgaris) in aquatic environment, were studied. The results showed that nano-Fe3O4 was toxic to C. vulgaris and affected...

2015
Boris Jovanović

Titanium dioxide nanoparticles are photoactive and produce reactive oxygen species under natural sunlight. Reactive oxygen species can be detrimental to many organisms, causing oxidative damage, cell injury, and death. Most studies investigating TiO2 nanoparticle toxicity did not consider photoactivation and performed tests either in dark conditions or under artificial lighting that did not sim...

ژورنال: سلامت و محیط زیست 2011
راستکاری, نوشین, زارع, محمدرضا, علی محمدی, محمود, موسوی, سیدنجات, ندافی, کاظم, یونسیان, مسعود,

Background and Objectives: This study was conducted to investigate the toxicity of Titanium Oxide (TiO2) and Zinc Oxide (ZnO) nanoparticles as two of most widely used nanoparticles. The result of this study can help to designing environmental standard and legislations for nanoparticles.Materials and Methods: Different concentrations of nano ZnO and TiO2 nanoparticles were added to nutrient Agar...

Journal: :Nanotoxicology 2014
Laura R Heggelund Maria Diez-Ortiz Stephen Lofts Elma Lahive Kerstin Jurkschat Jacek Wojnarowicz Nina Cedergreen David Spurgeon Claus Svendsen

To determine how soil properties influence nanoparticle (NP) fate, bioavailability and toxicity, this study compared the toxicity of nano zinc oxide (ZnO NPs), non-nano ZnO and ionic ZnCl2 to the earthworm Eisenia fetida in a natural soil at three pH levels. NP characterisation indicated that reaction with the soil media greatly controls ZnO properties. Three main conclusions were drawn. First ...

Journal: :Ecotoxicology 2015
Patryk Oleszczuk Izabela Jośko Ewa Skwarek

The objective of the study was the estimation of the effect of surfactants on the toxicity of ZnO, TiO2 and Ni nanoparticles (ENPs) towards Daphnia magna. The effect of hexadecyltrimethylammonium bromide (CTAB), triton X-100 (TX100) and 4-dodecylbenzenesulfonic acid (SDBS) was tested. The Daphtoxkit F test (conforming to OECD Guideline 202 and ISO 6341) was applied for the toxicity testing. Bot...

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