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63 results for “Titanium dioxide”
Simulation file for "Titanium dioxide and silver nanoparticles air emissions risk assessment for spray coating processes in Witek, Italy – A case study"
<p>Underlying data for “Nanosized titanium dioxide particle emission potential from a commercial indoor air purifier photocatalytic surface – A case study”</p>
Experimental raw data sets associated with certified reference material BAM-P116 (titanium dioxide) for comparison of nitrogen and argon sorption, available in the universal adsorption information format (AIF)
<p>These data sets serve as models for calculating the specific surface area (BET method) using gas sorption in accordance with ISO 9277.<br>The present measurements were carried out with nitrogen at 77 Kelvin and argon at 87 Kelvin.<br>It is recommended to use the following requirements for the molecular cross-sectional area:<br>Nitrogen: 0.1620 nm²<br>Argon: 0.1420 nm²</p> <p>Expected specific surface area for nitrogen (BET): 305 to 345 m²/g<br>Expected specific surface area for argon (BET): 300 to 310 m²/g</p> <p>Titanium dioxides certified with nitrogen sorption and additionally measured with argon for research purposes were used as sample material.<br>The resulting data sets are intended to serve as comparative data for own measurements and show the differences in sorption behaviour and evaluations between nitrogen and argon.<br>These data are stored in the universal AIF format (adsorption information format), which allows flexible use of the data.</p>
Data set for publication: Interfacial Deposition of Titanium Dioxide at the Polarized Liquid– Liquid Interface
<p>The attached files are the raw data used to write the manuscript (.txt; .csv; .jpg): Interfacial Deposition of Titanium Dioxide at the Polarized Liquid– Liquid Interface</p>
Effects of titanium dioxide nanoparticles on porcine pre-pubertal sertoli cells
<p>This dataset contains data from an <em>in vitro</em> experiment described in the paper: "Mancuso F, Arato I, Di Michele A, Antognelli C, Angelini L, Bellucci C, Lilli C, Boncompagni S, Fusella A, Bartolini D, Russo C, Moretti M, Nocchetti M, Gambelunghe A, Muzi G, Baroni T, Giovagnoli S, Luca G. Effects of Titanium Dioxide Nanoparticles on Porcine Prepubertal Sertoli Cells: An "In Vitro" Study. Front Endocrinol (Lausanne). 2022 Jan 3;12:751915. doi: 10.3389/fendo.2021.751915. PMID: 35046890; PMCID: PMC87623342".</p> <p>The data describes the X-ray diffraction (XRD), scanning electron microscopy (SEM) analysis to confirm the correct synthesis of titanium dioxide<sub> </sub>nanoparticles (TiO<sub>2</sub> NPs), and the transmission electron microscopy (TEM) analysis to investigate the morphological/ultrastructural effects on porcine pre-pubertal Sertoli cells (SCs), after an acute (24 hours) and chronic (from 1 up to 3 weeks) exposure, at both sub-toxic (5 µg/ml) and toxic (100 µg/ml) doses of TiO<sub>2</sub> NPs.</p> <p>The diffractogram confirmed the correct synthesis of TiO2 NPs in accordance with the International Centre for Diffraction Data Sample (JCPDS 00-001-0562) and the asterisk (*) represents the peaks of TiO<sub> </sub>NPs in anatase form; SEM analysis showed that the mean size distribution of TiO<sub>2</sub> NPs in dry form was 20 ± 5 nm and confirmed that TiO<sub>2</sub> NPs tend to form aggregates of submicrometric dimensions;</p> <p>Representative TEM images of unexposed SCs showed elongated oval or spindle-shaped SCs containing quite large nuclei (N) and abundant mitochondria. SCs did not show substantial and/or severe ultrastructural alterations in SCs treated with 5 µg/ml TiO2 NPs for 1 and 2 weeks, in all the other exposure conditions (5 µg/ml for 3 weeks and 100 µg/ml for 1, 2, and 3 weeks), SCs showed several ultrastructural changes with a high percentage of severely damaged SCs, presenting different features of cell stress such as deeply invaginated and shrunk nuclei, disorder/ marginalization of chromatin components, swollen very fragmented, or almost completely missing endoplasmic reticulum membranes. In addition, mitochondrial morphology was severely affected and mitochondria number dramatically decreased with the presence of several large vacuoles, probably as a result of apoptotic mitochondria and/or enlarged endoplasmic reticulum and/or increased frequency of lipid droplets.</p> <p>The main results of the experiments are that long time constant exposure of SCs at both TiO<sub>2</sub> NPs concentrations inevitably led to an altered ultrastructure.</p>
Research data supporting "Investigating the accumulation and translocation of titanium dioxide nanoparticles with different surface modifications in static and dynamic human placental transfer models"
<p>Research data supporting the publication: Aengenheister, L. et al., 2019, "Investigating the accumulation and translocation of titanium dioxide nanoparticles with different surface modifications in static and dynamic human placental transfer models", Eur J Pharm Biopharm. https://doi.org/10.1016/j.ejpb.2019.07.018</p>
Experimental raw data sets associated with certified reference material BAM-P115 (titanium dioxide) for comparison of nitrogen and argon sorption, available in the universal adsorption information format (AIF)
<p>These data sets serve as models for calculating the specific surface area (BET method) using gas sorption in accordance with ISO 9277.<br>The present measurements were carried out with nitrogen at 77 Kelvin and argon at 87 Kelvin.<br>It is recommended to use the following requirements for the molecular cross-sectional area:<br>Nitrogen: 0.1620 nm²<br>Argon: 0.1420 nm²</p> <p>Expected specific surface area for nitrogen (BET): 140 to 154 m²/g<br>Expected specific surface area for argon (BET): 129 to 135 m²/g</p> <p>Titanium dioxides certified with nitrogen sorption and additionally measured with argon for research purposes were used as sample material.<br>The resulting data sets are intended to serve as comparative data for own measurements and show the differences in sorption behaviour and evaluations between nitrogen and argon.<br>These data are stored in the universal AIF format (adsorption information format), which allows flexible use of the data.</p>
Experimental raw data sets associated with certified reference material BAM-P114 (titanium dioxide) for comparison of nitrogen and argon sorption, available in the universal adsorption information format (AIF)
<p>These data sets serve as models for calculating the specific surface area (BET method) using gas sorption in accordance with ISO 9277.<br>The present measurements were carried out with nitrogen at 77 Kelvin and argon at 87 Kelvin.<br>It is recommended to use the following requirements for the molecular cross-sectional area:<br>Nitrogen: 0.1620 nm²<br>Argon: 0.1420 nm²</p> <p>Expected specific surface area for nitrogen (BET): 24 to 25 m²/g<br>Expected specific surface area for argon (BET): 20 m²/g</p> <p>Titanium dioxides certified with nitrogen sorption and additionally measured with argon for research purposes were used as sample material.<br>The resulting data sets are intended to serve as comparative data for own measurements and show the differences in sorption behaviour and evaluations between nitrogen and argon.<br>These data are stored in the universal AIF format (adsorption information format), which allows flexible use of the data.</p>
Proteomics reveals multiple effects of titanium dioxide and silver nanoparticles in the metabolism of turbot, Scophthalmus maximus
<p>Titanium dioxide (TiO2) and silver (Ag) NPs are among the most used engineered inorganic nanoparticles (NPs);<br> however, their potential effects to marine demersal fish species, are not fully understood. Therefore, this study<br> aimed to assess the proteomic alterations induced by sub-lethal concentrations citrate-coated 25 nm (“P25”) TiO2<br> or polyvinylpyrrolidone (PVP) coated 15 nm Ag NPs to turbot, Scophthalmus maximus. Juvenile fish were exposed<br> to the NPs through daily feeding for 14 days. The tested concentrations were 0, 0.75 or 1.5 mg of each NPs per kg of fish per day. The determination of NPs, Titanium and Ag levels (sp-ICP-MS/ICP-MS) and histological alterations<br> (Transmission Electron Microscopy) supported proteomic analysis performed in the liver and kidney.<br> Proteomic sample preparation procedure (SP3) was followed by LC-MS/MS. Label-free MS quantification<br> methods were employed to assess differences in protein expression. Functional analysis was performed using<br> STRING web-tool. KEGG Gene Ontology suggested terms were discussed and potential biomarkers of exposure<br> were proposed. Overall, data shows that liver accumulated more elements than kidney, presented more histological<br> alterations (lipid droplets counts and size) and proteomic alterations. The Differentially Expressed Proteins<br> (DEPs) were higher in Ag NPs trial. The functional analysis revealed that both NPs caused enrichment of<br> proteins related to generic processes (metabolic pathways). Ag NPs also affected protein synthesis and nucleic<br> acid transcription, among other processes. Proteins related to thyroid hormone transport (Serpina7) and calcium<br> ion binding (FAT2) were suggested as biomarkers of TiO2 NPs in liver. For Ag NPs, in kidney (and at a lower<br> degree in liver) proteins related with metabolic activity, metabolism of exogenous substances and oxidative stress<br> (e.g.: NADH dehydrogenase and Cytochrome P450) were suggested as potential biomarkers. Data suggests<br> adverse effects in turbot after medium/long-term exposures and the need for additional studies to validate<br> specific biological applications of these NPs.</p>
Titanium dioxide nanoparticles assessment in seaweeds by single particle inductively coupled plasma – Mass spectrometry
<p>n this study, a first attempt for isolating and determining (characterising) background levels of <a href="https://www.sciencedirect.com/topics/chemistry/titanium-dioxide-nanoparticle">titanium dioxide nanoparticles</a> (TiO<sub>2</sub> NPs) in seaweed has been developed by using single particle inductively coupled plasma – mass spectrometry (SP-ICP-MS). Seaweeds were processed using an optimised <a href="https://www.sciencedirect.com/topics/chemistry/ultrasound-extraction">ultrasound assisted extraction</a> (UAE) procedure based on <a href="https://www.sciencedirect.com/topics/chemistry/tetramethylammonium-hydroxide">tetramethylammonium hydroxide</a> (TMAH) before dilution and SP-ICP-MS analysis. The effect of the TMAH percentage in the extracting solution, as well as the volume of extracting solution and <a href="https://www.sciencedirect.com/topics/chemistry/sonication">sonication</a> (extraction) time, has been fully assessed. Additional experiments also showed that TiO<sub>2</sub> NPs were quantitatively released from the seaweed matrix in one UAE step since the analysis of residues gave TiO<sub>2</sub> NPs concentrations lower than the limit of quantification (LOQ) of the method. Validation of the method with 50 and 100 nm TiO<sub>2</sub> NPs (10 μg L<sup>−1</sup> as Ti) showed good analytical recovery (115% and 112% for 50 and 100 nm TiO<sub>2</sub> NPs, respectively), and good reproducibility (2% for size and 16% for number of TiO<sub>2</sub> NPs). Experiments regarding TiO<sub>2</sub> NPs stability showed that the extracted NPs are stable since there were not changes on the number of TiO<sub>2</sub> NPs and TiO<sub>2</sub> NPs size distributions when exposing TiO<sub>2</sub> NPs standards to the optimised extractive conditions.</p>
Effects of titanium dioxide nanoparticles on porcine pre-pubertal sertoli cells
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Raw files of charge density isosurfaces of different polarons in titanium dioxide
<p>The raw files for the polaron charge densities isosurfaces plotted in "Identification of large polarons in rutile and anatase polymorphs of titanium dioxide".</p>
Effect of MVX (Titanium Dioxide) on the Microbial Colonization of Surfaces in an Intensive Care Unit
ClinicalTrials.gov study NCT02348346. IPD Sharing: Not stated. Countries: 1. Publications: 13.
SARS-CoV-2 viability after exposure to titanium dioxide coated tiles
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Dataset/Effect of titanium dioxide nanoparticles and low salinity water.
<p>Summary of experimental dataset of titanium dioxide nanoparticles on low salinity water.</p>
Nanosized titanium dioxide particle emission potential from a commercial indoor air purifier photocatalytic surface – A case study
<p>A measurement dataset for a study titled "Nanosized titanium dioxide particle emission potential from a commercial indoor air purifier photocatalytic surface – A case study" </p>
Titanium dioxide (TiO2) thin films study, deposited by laser ablation on glass substrates in the form of prismatic figures type pyramidal
<p>Thin films are something that is very close to the atomic dimensions in thickness, therefore if it is possible to further reduce the width of these, in a controlled way and monitor the behavior of some physical law associated with the variation in thickness, the results can be as expected or maybe adjustments must be applied. For this reason in this work, thin films of titanium dioxide (TiO2) are studied, deposited by laser ablation, on glass substrates in the form of prismatic figures. The main objective was to confine the plasma plume to produce a continuous trail with varying thicknesses that could be analyzed. Growth times of the films were 5, 10, 15, 20 and 30 minutes at room temperature in a low vacuum. The deposited films presented a color pattern related to the expected thickness variation, thus the theory of optical interference was applied to the continuous trace to calculate thicknesses. Characterization process was carried out by: X-ray diffraction to know the crystalline structure of the films, ultraviolet-visible spectroscopy to verify the variation of thicknesses, X-ray photoelectron spectroscopy to know the composition and scanning electron microscopy, to measure the thicknesses of the films transversely.</p>
Caco-2 in vitro model of human gastrointestinal tract for studying the absorption of titanium dioxide and silver nanoparticles from seafood
<p><a href="https://www.sciencedirect.com/topics/chemistry/titanium-dioxide-nanoparticle">Titanium dioxide nanoparticles</a> (TiO<sub>2</sub> NPs) are widely used in industry as a white pigment (paints, paper industry and toothpastes), photocatalysts (environmental decontamination and photovoltaic cells), inorganic UV filter (sunscreens and personal care products) and as a <a href="https://www.sciencedirect.com/topics/chemistry/food-additive">food additive</a> (E171) and antimicrobial food packaging material. <a href="https://www.sciencedirect.com/topics/chemistry/silver-nanoparticle">Silver nanoparticles</a> (Ag NPs) are used in photonics, microelectronics, catalysis and medicine due to their catalytic activity, magnetic and optical polarizability, electrical and <a href="https://www.sciencedirect.com/topics/chemistry/thermal-conductivity">thermal conductivities</a> and enhanced Raman scattering. They also have antibacterial, antifungal and <a href="https://www.sciencedirect.com/topics/chemistry/antiviral-activity">antiviral activities</a>, as well as anti-inflammatory potential. The huge increase in the use of nano-based products, mainly metallic <a href="https://www.sciencedirect.com/topics/chemistry/nanoparticle">NPs</a>, implies the presence of <a href="https://www.sciencedirect.com/topics/chemistry/nanomaterial">nanomaterials</a> in the environment, and hence, the unintentional human ingestion through water or foods (gastrointestinal tract is the main pathway of NPs intake in humans).</p> <p>The presence of TiO<sub>2</sub> NPs and Ag NPs in seafood samples was firstly established using an ultrasound assisted <a href="https://www.sciencedirect.com/topics/chemistry/enzymatic-hydrolysis">enzymatic hydrolysis</a> procedure and sp-ICP-MS analysis. Several clams, cockles, mussels, razor clams, oysters and variegated scallops, which contain TiO<sub>2</sub> NPs and Ag NPs, were subjected to an <em>in vitro</em> digestion process simulating human gastrointestinal digestion in the stomach and in the small and large intestine to determine the bioaccessibility of these NPs. Caco-2 cells were selected as model of human intestinal epithelium for transport studies because of the development of membrane transporters that are responsible for the uptake of chemicals. Parameters as transepithelial electrical resistance (TEER) and permeability of Lucifer Yellow were studied for establishing cell monolayer integrity. TiO<sub>2</sub> NPs and Ag NPs transport as well as total Ti and Ag concentrations passing through the gastrointestinal epithelial barrier model (0–2 h) were assessed by sp-ICP-MS and ICP-MS in several molluscs.</p>
Evaluation of the Protection Activity of Microfine Titanium Dioxide (Ti02), Pigmentary Ti02 and Bisoctrizole and Their Combinations in Voluntary Patients With Idiopathic Solar Urticaria (SU)
ClinicalTrials.gov study NCT00483496. IPD Sharing: Not stated. Countries: 2. Publications: 0.
Titanium dioxide (TiO2) thin films study, deposited by laser ablation on glass substrates in the form of prismatic figures type pyramidal
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Effect of Titanium dioxide nanoparticles on Escherichia coli K12 MG1655 genes expression
GEO Series GSE55972. Escherichia coli CFT073; Escherichia coli O157:H7 str. Sakai; Escherichia coli str. K-12 substr. MG1655; Escherichia coli O157:H7 str. EDL933. 8 samples. Type: Expression profiling by array.
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