Understanding the role of nano-TiO2 on the toxicity of Pb on C. dubia through modeling—Is it additive or synergistic?

The associated effects of polarization strength, polarization rate, and dielectric loss on ER performance ware studied by means of the correlation of rheological properties of carbon-doped TiO 2 ER fluids with experimental results of flow-modified permittivity (FMP). We prepared ER fluids with carbon-doped TiO 2 powders of different conductivity via controlling carbonization temperature and organic contents. The experiments present the optimum organic contents of 4.6% to 9.2% and the optimum carbonization temperature of around 673 K for the better ER activity. The role of conductivity in ER performance is testified. FMP measurements of fluids were performed under weak and strong exciting fields respectively. Under weak exciting field, FMP effects are hardly detectable; while under high exciting field, FMP effects become significant which reflect ER particle configurations, particle orientations, and limited dielectric response time in the combined electric and shear fields. The shear field strength, exciting field strength and frequency are the three main factors influencing the FMP effects. The FMP data can be modeled and qualitatively explained by introducing two characteristic shear rates of D c 1 and D c 2, J = J 0+ J 1 exp (- D / D c 1)+ J 2 exp (- D / D c 2) with D being shear rate.

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Molecular mechanism of mice gastric oxidative damage induced by nanoparticulate titanium dioxide

Toxicology Research ◽

10.1093/toxres/tfaa086 ◽

2021 ◽

Author(s):

Jianhui Ji ◽

Yingjun Zhou ◽

Fashui Hong ◽

Yuguan Ze ◽

Dongxue Fan ◽

...

Keyword(s):

Oxidative Stress ◽

Titanium Dioxide ◽

Antioxidant Enzymes ◽

Molecular Mechanisms ◽

Intragastric Administration ◽

Nano Tio2 ◽

Related Factors ◽

Atp Production ◽

Cyt C

Abstract Background Nanoparticulate titanium dioxide (Nano-TiO2) has been widely used in food industry, and it has been demonstrated to have adverse effects on mice and human stomach, but its mechanism is rarely concerned. The aim of this study is to determine the effects of nano-TiO2 on the stomach and confirm the role of oxidative stress and apoptosis in the mice gastric damage caused by nano-TiO2, as well as its molecular mechanisms. Methods Mice were continuously exposed to nano-TiO2 with 1.25, 2.5 and 5 mg/kg bw by intragastric administration for 9 months in the present study. The ultrastructure, levels of reactive oxygen species (ROS) and peroxides, activities of antioxidant enzymes and mitochondria-related enzymes, ATP contents as well as apoptosis-related factors expression in mice stomach were examined. Results Oxidative stress, apoptosis and nano-TiO2 aggregation were found in gastric mucosal smooth muscle cells after nano-TiO2 exposure. Nano-TiO2 exposure also resulted in the over-production of ROS and peroxides, decrease of ATP production and activities of antioxidant enzymes and mitochondria-related ATPases, upregulation of apoptosis-related factors including γH2AX, Cyt c, caspase 3, and p-JNK expression, and down-regulation of Bcl-2 expression in mice stomach. Conclusions The gastric toxicity of mice induced by chronic exposure to low dose nano-TiO2 may be associated with oxidative stress and mitochondria-mediated apoptosis in mice.

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Promotional role of nano TiO2 for pomegranate-like SnS2@C spheres toward enhanced sodium ion storage

Chemical Engineering Journal ◽

10.1016/j.cej.2019.01.130 ◽

2019 ◽

Vol 363 ◽

pp. 213-223 ◽

Cited By ~ 19

Author(s):

Xuebu Hu ◽

Qimeng Peng ◽

Tianbiao Zeng ◽

Biao Shang ◽

Xun Jiao ◽

...

Keyword(s):

Sodium Ion ◽

Nano Tio2 ◽

Ion Storage ◽

Sodium Ion Storage

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The Role of Nano-TiO2 Lubricating Fluid on the Hot Rolled Surface and Metallographic Structure of SS41 Steel

Nanomaterials ◽

10.3390/nano8020111 ◽

2018 ◽

Vol 8 (2) ◽

pp. 111 ◽

Cited By ~ 7

Author(s):

Yanan Meng ◽

Jianlin Sun ◽

Ping Wu ◽

Chang Dong ◽

Xudong Yan

Keyword(s):

Nano Tio2 ◽

Metallographic Structure ◽

Hot Rolled ◽

Rolled Surface

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The role of electron interfacial transfer in mesoporous nano-TiO2 photocatalysis: a combined study of in situ photoconductivity and numerical kinetic simulation

Physical Chemistry Chemical Physics ◽

10.1039/c6cp07328j ◽

2017 ◽

Vol 19 (13) ◽

pp. 8866-8873 ◽

Cited By ~ 12

Author(s):

Baoshun Liu ◽

Jingjing Yang ◽

Xiujian Zhao ◽

Jiaguo Yu

Keyword(s):

Formic Acid ◽

Thermal Barrier ◽

Kinetic Simulation ◽

Nano Tio2 ◽

Tio2 Photocatalysis ◽

Electron Kinetics ◽

Interfacial Transfer

The present study showed that electron interfacial transfer is rate-determined for the whole electron kinetics during the gaseous photocatalysis of formic acid due to the existence of a high thermal barrier.

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BTCA/Nano TiO2 Synergism on Cotton: Enhanced Antibacterial Features Optimized by Statistical Models

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501300800306 ◽

2013 ◽

Vol 8 (3) ◽

pp. 155892501300800

Author(s):

Ali Nazari ◽

Majid Montazer ◽

Mohammad Bameni Moghadam ◽

Mohammad Esmail Yazdanshenas

Keyword(s):

Cotton Fabric ◽

Antibacterial Properties ◽

Optimum Concentration ◽

X Ray Diffraction ◽

Nano Tio2 ◽

Curing Conditions ◽

X Ray ◽

Escherichia Coli Bacteria ◽

Nano Titanium Dioxide

The application of Butane tetra carboxylic acid/nano titanium dioxide [(BTCA)/Nano TiO2 (NTO)] on cotton fabric has been used to cross-linked cellulose, and yield higher NTO absorption and enhanced self-cleaning properties. In this research, the synergistic effect of BTCA and NTO on antibacterial properties of the cotton fabric was investigated. The NTO particles were stabilized on the cotton surface using BTCA. Then, different curing conditions (UV, Temp, and UV-Temp) were examined. The treated fabrics indicated an antibacterial activity against both Staphylococcus aureus and Escherichia coli bacteria. The role of both BTCA and NTO concentrations on antibacterial properties of the cotton fabric were investigated using response surface methodology (RSM). Also, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were employed to confirm the NTO particles on the cotton surface. Cotton fabric treated with optimum concentration of NTO and BTCA obtained enhanced antibacterial properties.

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