نتایج جستجو برای: MWCNT

تعداد نتایج: 1827  

2017
Anika Kaufmann Silke Hampel Christiane Rieger David Kunhardt Darja Schendel Susanne Füssel Bernd Schwenzer Kati Erdmann

BACKGROUND In addition to conventional chemotherapeutics, nucleic acid-based therapeutics like antisense oligodeoxynucleotides (AS-ODN) represent a novel approach for the treatment of bladder cancer (BCa). An efficient delivery of AS-ODN to the urothelium and then into cancer cells might be achieved by the local application of multi-walled carbon nanotubes (MWCNT). In the present study, pristin...

2014
Jiegou Xu David B Alexander Mitsuru Futakuchi Takamasa Numano Katsumi Fukamachi Masumi Suzui Toyonori Omori Jun Kanno Akihiko Hirose Hiroyuki Tsuda

Multiwalled carbon nanotubes (MWCNT) have a fibrous structure similar to asbestos, raising concern that MWCNT exposure may lead to asbestos-like diseases. Previously we showed that MWCNT translocated from the lung alveoli into the pleural cavity and caused mesothelial proliferation and fibrosis in the visceral pleura. Multiwalled carbon nanotubes were not found in the parietal pleura, the initi...

2010
Shigetoshi AISO Hisayo KUBOTA Yumi UMEDA Tatsuya KASAI Mitsutoshi TAKAYA Kazunori YAMAZAKI Kasuke NAGANO Shoji FUKUSHIMA

In order to assess the extrapulmonary effects of multiwall carbon nanotubes (MWCNT), deposition of MWCNT and histopathologic changes in lung-associated lymph nodes (LALN) were examined in MWCNT-administered rats. At the age of 13 wk, male F344 rats were intratracheally instilled with MWCNT at a dose of 0 (vehicle), 40 or 160 μg/rat. The rats were sacrificed on Day 1, 7, 28 or 91 after instillat...

2015
Anatoly Zinchenko Yosuke Taki Vladimir G. Sergeyev Shizuaki Murata

A simple method for preparation of DNA-carbon nanotubes hybrid hydrogel based on a two-step procedure including: (i) solubilization of multi-walled carbon nanotubes (MWCNT) in aqueous solution of DNA, and (ii) chemical cross-linking between solubilized MWCNT via adsorbed DNA and free DNA by ethylene glycol diglycidyl ether is reported. We show that there exists a critical concentration of MWCNT...

2013
Shiuh-Chuan Her Chun-Yu Lai

The influence of multi-walled carbon nanotubes (MWCNT) on the structural dynamic behavior of MWCNT/epoxy nanocomposites was investigated. Two different types of MWCNTs, pristine MWCNT and functionalized MWCNT, were used in this study. Carboxylic acid-functionalized MWCNTs (MWCNT-COOH) were obtained by oxidation pristine MWCNTs via sonication in sulfuric-nitric acid and characterized by Fourier ...

2012
IN-YUP JEON HYUN-JUNG CHOI LOON-SENG TAN JONG-BEOM BAEK

We reported the functionalization of multiwalled carbon nanotube (MWCNT) with 4-aminobenzoic acid by a ‘‘direct’’ Friedel–Crafts acylation reaction in a mild polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) medium. The resulting 4aminobenzoyl-functionalized MWCNT (AF-MWCNT) was used as a platform for the grafting of polypyrrole (PPy) in ammonium persulfate (APS)/aqueous hydrochloric acid ...

Journal: :Industrial health 2012
Mitsutoshi Takaya Mariko Ono-Ogasawara Yasushi Shinohara Hisayo Kubota Shuji Tsuruoka Shigeki Koda

Various applications of multiwalled carbon nanotubes (MWCNT) have been developed. One of these applications is an efficient sheet heating element that is woven from MWCNT-coated yarn. In this research, we assessed the exposure to MWCNT and/or the probability of particle release from broken MWCNT-coated yarn during the weaving process. This was accomplished using particle concentrations, microsc...

Journal: :Journal of occupational health 2010
Masumi Asakura Toshiaki Sasaki Toshie Sugiyama Mitsutoshi Takaya Shigeki Koda Kasuke Nagano Heihachiro Arito Shoji Fukushima

OBJECTIVES The potential applications and industrial production of multi-wall carbon nanotubes (MWCNT) have raised serious concerns about their safety for human health and the environment. The present study was designed to examine the in vitro cytotoxicity and genotoxicity of MWCNT and UICC chrysotile A (chrysotile). METHODS Cytotoxicity using both colony formation and lactate dehydrogenase (...

2017
Chi-Hui Tsou Wei-Hua Yao Yi-Cheng Lu Chih-Yuan Tsou Chin-San Wu Jian Chen Ruo Yao Wang Chaochin Su Wei-Song Hung Manuel De Guzman Maw-Cherng Suen

A novel method was used to synthesize a nanosilver-doped multiwall carbon nanotube (MWCNT-Ag), and subsequently, the novel poly(lactic acid) (PLA)and MWCNT-Ag-based biocompatible and antimicrobial nanocomposites were prepared by melt blending. Based on energy dispersive X-ray spectrometry images, an MWCNT-Ag was successfully synthesized. The effect of the MWCNT-Ag on the PLA bionanocomposites w...

Journal: :Acta biomaterialia 2012
Ross Ormsby Tony McNally Peter O'Hare George Burke Christina Mitchell Nicholas Dunne

Composites of multi-walled carbon nanotubes (MWCNT) of varied functionality (unfunctionalised and carboxyl and amine functionalised) with polymethyl methacrylate (PMMA) were prepared for use as a bone cement. The MWCNT loadings ranged from 0.1 to 1.0 wt.%. The fatigue properties of these MWCNT-PMMA bone cements were characterised at MWCNT loading levels of 0.1 and 0.25 wt.% with the type and wt...

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