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Industrial Applications
Published in Vlado Valković, Low Energy Particle Accelerator-Based Technologies and Their Applications, 2022
Xiao et al. (2005) presented their results obtained by MeV Si ion bombardments of thermoelectric (TE) BixTe3/Sb2Te3 multilayer thin films for reducing thermal conductivity. BixTe3/SbzTe3 multilayer thin films were grown as TE materials using electron-beam evaporation. Solid antimony (Ill) telluride and bismuth (Ill) telluride were used for the growth of Bi, Te3 and Sb, Te3 layers. RBS analysis showed that the grown antimony telluride film has the stoichiometry of Sb2Te3 and the bismuth telluride film is Bi1.1Te3. The grown multilayer films have a periodic structure consisting of alternating Bil.lTe3 and Sb2Te3 layers. The Bil.l Te3/Sb2Te3 multilayer thin films with five or seven layers were analyzed by RBS. The grown Bil.lTe3 and Sb2Te3 monolayer thin films and Bi1.lTe3/Sb2Te3 multilayer thin films were bombarded by 5 MeV Si ions. The thermal conductivity of the grown films was measured by a 3ω-method thermal conductivity measurement system. The multilayer structure and MeV Si ion bombardment made the films to have a lower thermal conductivity.
Inhalation Toxicity of Metal Particles and Vapors
Published in Jacob Loke, Pathophysiology and Treatment of Inhalation Injuries, 2020
Tellurium is used in the steel industry in Cu and Pb alloys to provide increased resistance to corrosion and stress, in the glass industry as a coloring agent, and as an additive in rubber. Bismuth telluride is used as a thermocouple material in refrigeration equipment.
Radioactive Se And Te Labeled Imaging Agents
Published in Garimella V. S. Rayudu, Lelio G. Colombetti, Radiotracers for Medical Applications, 2019
Tellurium compounds can be prepared by procedures similar to those for selenium compounds.3,11-13 Te-123m tellurium metal is reduced by sodium borohydride,12 sodium metal in liquid ammonia,13 etc. to sodium ditelluride (Na2Te2) or sodium telluride (Na2Te) (Scheme 2). However, the reduction and subsequent alkylation reaction takes longer and requires more vigorous reaction conditions. In general, tellurium compounds are more difficult to prepare and less stable to light- and air-oxidation than the corresponding selenium compounds.
Paclitaxel-loaded ROS-responsive nanoparticles for head and neck cancer therapy
Published in Drug Delivery, 2023
Yaqin Tu, Wei Zhang, Guorun Fan, Chenming Zou, Jie Zhang, Nan Wu, Jiahui Ding, Wen Qing Zou, Hongjun Xiao, Songwei Tan
Given the pathological ROS levels in cancer cells, researchers have been increasingly interested in the application of ROS-responsive drug delivery systems for tumor therapy (Saravanakumar et al., 2017; Li et al., 2020; Liang et al., 2021; Mollazadeh et al., 2021). Various ROS-responsive functional groups, such as prodrugs or carriers that have been utilized in the application of smart drug delivery systems, including structures that contain thioketal, thioether, monoselenide/diselenide, telluride, arylboronic ester, aminoacrylate, oligoproline, and peroxalate ester, have been employed in the development of ROS-responsive drug delivery systems (Saravanakumar et al., 2017; Tao & He, 2018). Among them, thioether is a widely used ROS-responsive functional group with broad ROS species responsivity. Its oxidation products are sulfoxide or sulfone; these are much more hydrophobic than the original thioether, inducing a hydrophobic-hydrophobic phase transition of thioether-containing polymers. Moreover, the formation of sulfone promotes the hydrolysis of the proximal ester bond (Luo et al., 2016; Tan et al., 2022). Thus, a ROS-accelerated drug release will be achieved with thioether-based polymers or prodrugs.
Cardiac sympathetic denervation in wild-type transthyretin amyloidosis
Published in Amyloid, 2020
Alessia Gimelli, Alberto Aimo, Giuseppe Vergaro, Dario Genovesi, Valeria Santonato, Annette Kusch, Michele Emdin, Paolo Marzullo
Patients received intravenous 700–740 MBq of 99mTc-hydroxymethylene diphosphonate (99mTc-HMDP; OSTEOCIS®), and underwent a whole-body scan (anterior and posterior projections) 150 min later in a 256*1024 matrix (E.Cam; Siemens Medical Solution; Hoffman Estates, IL, USA). Planar images were acquired using low-energy, high-resolution collimators and an appropriate scan speed to reach over 2*106 counts. A cardiac tomographic acquisition was then performed in all patients using a Cadmium Zinc Telluride (CZT) camera (Discovery NM 530c; GE Healthcare; Haifa, Israel). The CZT images were reconstructed on a standard workstation (Xeleris II; GE Healthcare) using a previously validated dedicated iterative algorithm with 50 iterations. A Butterworth post-processing filter (frequency 0.37, order 7) was applied to the reconstructed slices. The tomographic studies were also re-projected into planar projections to emulate a standard SPECT layout. Images were reconstructed without correction for scatter or attenuation.
Device Development for Ocular Surface Temperature and Heat Flux Density Measurement
Published in Current Eye Research, 2023
Lukyan Anatychuk, Oleg Zadorozhnyy, Volodymyr Naumenko, Roman Kobylianskyi, Taras Kustryn, Illia Nasinnyk, Andrii Korol, Nataliya Pasyechnikova
A small-sized thermoelectric HF transducer for this device was developed and made according to the technology of the Institute of Thermoelectricity of the National Academy of Sciences of Ukraine and the Ministry of Education and Science of Ukraine. A thermoelectric miniature module (2 × 2 × 0.5 mm) contains 100 bismuth telluride-based crystals of thermoelectric material (0.17 × 0.17 × 0.4 mm). This micromodule is installed between two thin Al2O3-based ceramic plates (diameter 3 mm, thickness 0.1 mm) and carefully sealed from the sides. The developed HF transducer is 3 mm in diameter and 0.7 mm in thickness (contact surface area of about 7.1 mm2).