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Gotowa bibliografia na temat „Silica Tubes”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Silica Tubes"

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Tsujino, Tetsuhiro, Hideo Masuki, Masayuki Nakamura, Kazushige Isobe, Hideo Kawabata, Hachidai Aizawa, Taisuke Watanabe i in. "Striking Differences in Platelet Distribution between Advanced-Platelet-Rich Fibrin and Concentrated Growth Factors: Effects of Silica-Containing Plastic Tubes". Journal of Functional Biomaterials 10, nr 3 (17.09.2019): 43. http://dx.doi.org/10.3390/jfb10030043.

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Compared with platelet-rich plasma, the preparation of platelet-rich fibrin (PRF) is simple and has not been overly modified. However, it was recently demonstrated that centrifugation conditions influence the composition of PRF and that silica microparticles from silica-coated plastic tubes can enter the PRF matrix. These factors may also modify platelet distribution. To examine these possibilities, we prepared PRF matrices using various types of blood-collection tubes (plain glass tubes and silica-containing plastic tubes) and different centrifugation speeds. The protocols of concentrated growth factors and advanced-PRF represented high- and low-speed centrifugation, respectively. Platelet distribution in the PRF matrix was examined immunohistochemically. Using low-speed centrifugation, platelets were distributed homogeneously within the PRF matrix regardless of tube types. In high-speed centrifugation, platelets were distributed mainly on one surface region of the PRF matrix in glass tubes, whereas in silica-coated tubes, platelet distribution was commonly more diffusive than in glass tubes. Therefore, both blood-collection tube types and centrifugal conditions appeared to influence platelet distribution in the PRF matrix. Platelets distributed in the deep regions of the PRF matrix may contribute to better growth factor retention and release. However, clinicians should be careful in using silica-coated tubes because their silica microparticles may be a health hazard.

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Ochiai, Tsuyoshi, Shoko Tago, Hiromasa Tawarayama, Toshifumi Hosoya, Hitoshi Ishiguro i Akira Fujishima. "Fabrication of a Porous TiO2-Coated Silica Glass Tube and Its Application for a Handy Water Purification Unit". International Journal of Photoenergy 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/584921.

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A simple, handy, reusable, and inexpensive water purification unit including a one-end sealed porous amorphous-silica (a-silica) tube coated with 2 μm of porous TiO2photocatalyst layers has been developed. Both TiO2and a-silica layers were formed through outside vapor deposition (OVD). Raman spectrum of the porous TiO2-coated a-silica glass tube indicated that the anatase content of the TiO2layers of the tube was estimated to be approximately 60 wt%. Developed porous TiO2-coated a-silica glass tube has been assayed for the tube filtering feature againstEscherichia coli(E. coli) solution used as one of the typical bacteria size species or Qβphage also used as typical virus size species and compared with the feature of porous a-silica tubes alone. The tubes removedE. colicompletely from the aqueous suspension which contained 106 CFU/mL ofE. coliwithout UV irradiation. The porous TiO2-coated a-silica glass tube with UV-C lamps successfully reduced the Qβphage amount in the suspension from 109to 103 PFU/mL.

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Makki, Rabih, László Roszol, Jason J. Pagano i Oliver Steinbock. "Tubular precipitation structures: materials synthesis under non-equilibrium conditions". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, nr 1969 (28.06.2012): 2848–65. http://dx.doi.org/10.1098/rsta.2011.0378.

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Inorganic precipitation reactions are known to self-organize a variety of macroscopic structures, including hollow tubes. We discuss recent advances in this field with an emphasis on experiments similar to ‘silica gardens’. These reactions involve metal salts and sodium silicate solution. Reactions triggered from reagent-loaded microbeads can produce tubes with inner radii of down to 3 μm. Distinct wall morphologies are reported. For pump-driven injection, three qualitatively different growth regimes exist. In one of these regimes, tubes assemble around a buoyant jet of reactant solution, which allows the quantitative prediction of the tube radius. Additional topics include relaxation oscillations and the templating of tube growth with pinned gas bubble and mechanical devices. The tube materials and their nano-to-micro architectures are discussed for the cases of silica/Cu(OH) 2 and silica/Zn(OH) 2 /ZnO tubes. The latter case shows photocatalytic activity and photoluminescence.

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Tsujino, Tetsuhiro, Akira Takahashi, Sadahiro Yamaguchi, Taisuke Watanabe, Kazushige Isobe, Yutaka Kitamura, Takaaki Tanaka, Koh Nakata i Tomoyuki Kawase. "Evidence for Contamination of Silica Microparticles in Advanced Platelet-Rich Fibrin Matrices Prepared Using Silica-Coated Plastic Tubes". Biomedicines 7, nr 2 (19.06.2019): 45. http://dx.doi.org/10.3390/biomedicines7020045.

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Platelet-rich fibrin (PRF) therapy has been widely applied in regenerative dentistry, and PRF preparation has been optimized to efficiently form fibrin clots using plain glass tubes. Currently, a shortage of commercially available glass tubes has forced PRF users to utilize silica-coated plastic tubes. However, most plastic tubes are approved by regulatory authorities only for diagnostic use and remain to be approved for PRF therapy. To clarify this issue, we quantified silica microparticles incorporated into the PRF matrix. Blood samples were collected into three different brands of silica-containing plastic tubes and were immediately centrifuged following the protocol for advanced-PRF (A-PRF). Advanced-PRF-like matrices were examined using a scanning electron microscope (SEM), and silica microparticles were quantified using a spectrophotometer. Each brand used silica microparticles of specific size and appearance. Regardless of tube brands and individual donors, significant, but not accidental, levels of silica microparticles were found to be incorporated into the A-PRF-like matrix, which will be consequently incorporated into the implantation sites. Presently, from the increasing data for cytotoxicity of amorphous silica, we cannot exclude the possibility that such A-PRF-like matrices negatively influence tissue regeneration through induction of inflammation. Further investigation should be performed to clarify such potential risks.

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Naznin, L., D. Saha, S. Sultana i MMK Sarkar. "Interference in Serum Lithium Estimation by Silica Clot Activator and Silicone Surfactant in ISE Principle: a Cross-Sectional Study". Bangladesh Journal of Medical Biochemistry 8, nr 2 (23.07.2017): 60–65. http://dx.doi.org/10.3329/bjmb.v8i2.33281.

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Serum lithium concentration is monitored to ensure patient's compliance and to avoid intoxication and thus it is a prerequisite for an individual's dose adjustment. An unavoidable error during lithium estimation in blood collected in 'red-top plastic vacutainer plus tube containing silica clot activator and silicone surfactant' by ISE appeared as a reality for a standard laboratory like AFIP. The error could not be detected even by proven internal and external QC. This cross-sectional study was carried out at AFIP Chemical Pathology Department from May' 2015 to July'2015 to find out the interference causing falsely elevated serum lithium concentration by ISE principle. Blood were collected from the 40 study subjects including 30 healthy volunteers, who never took Tab Lithium and 10 patients, who used to take Tab Lithium for bipolar mood disorder in both 'plain red-top plastic vacutainer tubes without additive' as well as 'plain red-top plastic vacutainer plus tube containing silica clot activator and silicone surfactant'. Lithium concentrations were estimated in both types of tubes by Ion-Selective Electrode (ISE) principle employing world class, USA manufactured analyzer NOVA-4 as well as by colorimetric method using Dade Dimension, Siemens. Serum lithium concentrations were undetectable for the 'lithium-free normal volunteers' in both types of tubes measured by colorimetry but in ISE principle it was undetectable when collected in plain test tube without additives but when collected in 'vacutainer plus tube containing silica clot activator and silicone surfactant' and measured by ISE technique, the mean serum lithium concentration was found to be 1.78 ±0.40 mmol/l. Besides, mean serum lithium concentration of 10 individuals taking Tab Lithium had no statistically significant difference while measured by ISE or colorimetry in 'vacutainer tubes without additive' and also in 'vacutainer plus tubes containing silica clot activator and silicone surfactant' measured by colorimetry. But, vacutainer plus tubes containing silica clot activator and silicone surfactant' while measured serum lithium concentration by ISE principle had significant (p <0.001) increase in mean concentration than others, as determined by one-way ANOVA and Post-hoc tests. This study demonstrates that positive interference; caused by silica clot activator and silicone surfactant of the collection tubes; increases measured concentration of lithium. This interference; being in the pre-analytic phase, cannot be detected by routinely performed laboratory quality control.Bangladesh J Med Biochem 2015; 8(2): 60-65

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Brady, Allison M., Brady L. Spencer, Ann R. Falsey i Moon H. Nahm. "Blood Collection Tubes Influence Serum Ficolin-1 and Ficolin-2 Levels". Clinical and Vaccine Immunology 21, nr 1 (30.10.2013): 51–55. http://dx.doi.org/10.1128/cvi.00607-13.

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ABSTRACTThe ficolins are members of a recently discovered family of host innate opsonins that can activate the lectin pathway of complement. The ficolins bind many ligands, although they are typically described as binding acetylated sugars. Ficolin-1 (M-ficolin) and ficolin-2 (L-ficolin) are known to bindStreptococcus pneumoniaeserotypes 19C and 11A, respectively. While studying the binding of ficolins to pneumococci, we found variations in ficolin-2 binding among serum samples collected in different types of blood collection tubes. Plastic tubes, which contain a silica clot activator, yielded sera with reduced ficolin-2 binding and apparent ficolin-2 levels. We found that the silica clot activator eluted from plastic red-top tubes inhibited ficolin-2 ligand binding, while other related proteins, like mannose-binding lectin (MBL) and ficolin-1, were not affected. These tube types did not affect the concentrations of other related opsonins (C1q, MBL, or ficolin-3 [H-ficolin]). Interestingly, we also found that ficolin-1 levels were increased 2- to 3-fold in plastic serum separator tubes compared to the increases in other tube types. These findings have implications for future ficolin-1 and ficolin-2 studies, as proper sample collection and handling are essential.

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Chen, Hong Liang, Bin Bin Yang, Ji Song Yang, Yan Wang i Hui Ying Li. "Synthesis of Silicalite-1 Membrane with High-Thermal Stability on Silica Tubes by In Situ Hydrothermal Synthesis". Applied Mechanics and Materials 692 (listopad 2014): 391–95. http://dx.doi.org/10.4028/www.scientific.net/amm.692.391.

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Silicalite-1 membranes with high-thermal stability were prepared on silica tubes by two-step hydrothermal synthesis after filling the tubes with water and glycerol mixtures. It was found that the filling method can improve the membrane separation performance effectively. After filling the silica tubes with mixed solution, the average flux of silicalite-1 membranes was improved by 23% while keeping the separation selectivity nearly unchanged. The results showed that the silicalite-1 membrane still showed high separation performance towards ethanol/water mixture after the repeated calcination at 400°C for 5 h, even with a calcination rate of 4 °C/min, which suggested that silica tubes may be very suitable to synthesize high-performance silicalite-1 membranes in large area.

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Chen, Chih-Chieh, Chen-Hsiung Wu, Sheng-Hsiu Huang i Yu-Mei Kuo. "Aerosol Penetration through Silica Gel Tubes". Aerosol Science and Technology 36, nr 4 (kwiecień 2002): 457–68. http://dx.doi.org/10.1080/027868202753571278.

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Ávila-Gonzalez, Cesia, Rodolfo Cruz-Silva, Carmina Menchaca, Selene Sepulveda-Guzman i Jorge Uruchurtu. "Use of Silica Tubes as Nanocontainers for Corrosion Inhibitor Storage". Journal of Nanotechnology 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/461313.

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A new alkyd paint anticorrosion smart coating was developed by using silica nanoparticles as corrosion inhibitor nanocontainers. Silica particles were mixed with the paint at different concentrations to study their performance and ensure their free transportation to the damaged metal. The filling up of silica particles was done preparing three solutions: distilled water, acetone, and a mixture of both, with Fe(NO3)3and silica particles immersed in each of the solutions to adsorb the inhibitor. Acetone solution was the best alternative determined by weight gain analysis made with the inhibitor adsorbed in silica nanocontainers. Steel samples were painted with inhibitor silica nanocontainer coatings and immersed in an aqueous solution of 3% sodium chloride. Polarization curves and electrochemical noise techniques were used to evaluate the corrosion inhibitor system behavior. Good performance was obtained in comparison with samples without inhibitor nanocontainer coating.

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Song, Xiang-Yun, Wanqing Cao, Michael R. Ayers i Arlon J. Hunt. "Carbon nanostructures in silica aerogel composites". Journal of Materials Research 10, nr 2 (luty 1995): 251–54. http://dx.doi.org/10.1557/jmr.1995.0251.

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A new method of preparing carbon nanotubes and their derivatives using silica aerogels as a matrix for the deposition of carbon is repeated. We present results of observations of graphite tubes and rings including nested structures in nanometer dimensions using high resolution transmission electron microscopy. Furthermore, we propose a model for the growth of carbon nanotubes in three steps including nucleation, growth, and closure of tubes.

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Rozprawy doktorskie na temat "Silica Tubes"

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Schmiesing, Nickolas Charles. "Characterizing the Condensation Heat Transfer Performance of Uniform and Patterned Silica Nanospring-Coated Tubes". Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1557767797969861.

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Chamberlin, Joseph Paul. "Investigating the Water and Methanol Condensation Heat Transfer Performance of Chemically Functionalized Silica Nanospring Coated Aluminum Tubes". Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami162690676666569.

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Börjesson, Anders. "In silico studies of carbon nano tubes and metal clusters". Doctoral thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3565.

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Carbon nanotubes have been envisioned to become a very important material in various applications. This is due to the unique properties of carbon nanotubes which can be exploited in applications on length scales spanning from the nano world to our macroscopic world. For example, the electronic properties of carbon nanotubes makes them utterly suitable for nano electronics while the strength of them makes them suitable for reinforcements in plastics. Both of these applications do however require... mer the ability for systematic production of carbon nanotubes with certain properties. This is called selective carbon nanotube growth and today this has not been achieved with total success. In the work presented in the thesis several diﬀerent computational methods have been applied in our contribution to the systematic search for selective carbon nanotube growth. Put in a context of previous knowledge about carbon nanotube growth our results provide valuable clues to which parameters that control the carbon nanotube growth. In association with the latest results we even dare to, with all modesty, speculate about a plausible control mechanism. The studies presented in the thesis addressed diﬀerent stages of carbon nanotube growth, spanning from the properties aﬀecting the initiation of the growth to the parameters aﬀecting the termination of the growth. In some more detail this included studies of the melting temperatures of nanoscaled metal clusters. The expected size dependence of the melting temperatures was conﬁrmed and the melting temperatures of clusters on substrates were seen to depend both on the material and shape of the surface. As this constitute the premises prior to the carbon nanotube growth it was followed by studies of the interaction between carbon nanotubes and metal clusters of diﬀerent size and constitution. This was done using diﬀerent computational methods and at diﬀerent temperatures. It soon became apparent that the clusters adapted to the carbon nanotube and not vice versa. This held true irrespectively of the constitution of the cluster, that is for both pure metal and metal carbide. It was also seen that there exist a minimum cluster size that prevent the carbon nanotube end from closing. Closure of the carbon nanotube end is likely to lead to the termination of the growth which lead to studies of other reasons for growth termination, e.g., Ostwald ripening of the catalyst particles. This was investigated with the result that the rate of the Ostwald ripening may depend on both the chirality and diameter of the carbon nanotubes. It is suggested that this may provide some answers to the controlled growth of carbon nanotubes.

Disputationen sker fredagen den 3 december 2010, kl. 10:15, Kollektorn, Kemivägen 9

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Smolikov, A. A., A. I. Vezentsev, V. M. Beresnev, V. I. Pavlenko, A. S. Solokha i I. V. Sokolenco. "Nanotubular Crystals of Co-chrysotile (Co-hydro Silicate)". Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35256.

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The purpose of this work is to determine the optimal parameters of synthesis of nano-tubular crystals Co-chrysotile. The optimal temperature ranges and pressure for the synthesis of nano-tubular crystals Co-chrysotile 573 – 673 K, 19.6 – 98.1 MPa at the time of isothermal exposure from 15 to 24 h. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35256

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Nisarantaraporn, Ekasit. "Microstructural development and pressure requirements in 6063 aluminium alloy tube extrusion". Thesis, Imperial College London, 1995. http://hdl.handle.net/10044/1/7274.

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Harrington, Bruce Allan. "Tube polymers derived from potassium(2)copper silicon(4)oxygen(10) and a molecular modeling study of hypothetical tube structures". Case Western Reserve University School of Graduate Studies / OhioLINK, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=case1054644360.

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McMullan, A. D. "Investigation of slip within deep trench isolated silicon on insulator tubs". Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426661.

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Ozcan, Aysenur. "Investigating The Extrusion Of Alumina Silicate Pastes For Synthesis Of Monolith Zeolite A". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606469/index.pdf.

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Zeolites are highly porous materials that are most commonly used in granular or beaded forms. In general, zeolite granules, beads or monoliths are manufactured by using an inorganic binder which helps to cement zeolite crystals together. However, this inorganic binder decreases the purity of the zeolite structures and accessibility to the zeolite pores. A new and relatively easy method was offered for the production of binderless zeolite A tubes and bars from amorphous alumina silicate extrudates in this study. Amorphous alumina silicate powder, which is obtained by filtering the homogenous hydrogel with a composition of 2.5Na2O:1Al2O3:1.7SiO2:150H2O, is mixed with an organic binder (HEC-Hydroxyethyl Cellulose) to obtain the paste. The paste is then extruded through a die of a home-made extruder into bars and tubes. These extrudates were dried at room temperature for 24 hours, then calcined at 600oC for 2 hours and finally synthesized at 80oC for 72 hours in hydrothermal conditions to convert amorphous alumina silicate to zeolite. The most appropriate amorphous alumina silicate powder (A) / 4wt% HEC solution (H) ratio to prepare paste, hence to prepare bars and tubes was found as 0.82. The crystallinity of bars and tubes was 91% and 97%, respectively, and zeolite A was the only crystalline material. The bars and tubes were composed of highly intergrown zeolite A crystals with high porosity. Porosity of the bars is approximately 39% and porosity of the tubes is 29%, with a narrow pore size distribution. Bars have macropores of 2 &
#956
m, while the macropores of the tubes are 3-4 &
#956
m. The BET surface area of the bars was 411 m2/g and of tubes was 439 m2/g, which are comparable with the commercial zeolite A beads. Bars had a crushing strength of 0.42 MPa, which is sufficiently high to handle. In conclusion, zeolite A bars and tubes, with their high purity, macroporous structure and high mechanical strength, can be used in adsorption and ion exchange processes. The developed synthesis method can be scaled up to prepare honeycomb monoliths that provide higher surface are per unit volume with an appropriate extruder die.

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Drieux, Patxi. "Elaboration de tubes épais de SiC par CVD pour applications thermostructurales". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00958465.

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L'objectif de la thèse était de synthétiser des tubes de SiC monolithiques pour améliorer l'étanchéité de la structure composite SiC/SiC d'une gaine de combustible nucléaire. Des revêtements tubulaires de 8 mm de diamètre et quelques centaines de micromètres d'épaisseur ont été produits par dépôt chimique en phase vapeur à pression atmosphérique à partir d'un mélange CH3SiHCl2/H2. Le procédé a été développé de manière à réaliser en continu des tubes de SiC de plusieurs dizaines de centimètres de long. La composition chimique et la microstructure des tubes ont été déterminées par microsonde de Castaing, spectroscopie Raman, DRX et microscopie électronique (MEB, MET). Les propriétés mécaniques des tubes ont été caractérisées par nanoindentation et à travers des essais de compression C-ring. Le comportement thermomécanique a également été étudié. L'étude du procédé comprend une étude thermocinétique, un suivi de la phase gazeuse par IRTF et la modélisation 2D du réacteur.

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Al-Mamun, Mohammad Shah. "Development of a Miniature, Fiber-optic Temperature Compensated Pressure Sensor". Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/71308.

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Since the invention of Laser (in 1960) and low loss optical fiber (in 1966) [1], extensive research in fiber-optic sensing technology has made it a well-defined and matured field [1]. The measurement of physical parameters (such as temperature and pressure) in extremely harsh environment is one of the most intriguing challenges of this field, and is highly valued in the automobile industry, aerospace research, industrial process monitoring, etc. [2]. Although the semiconductor based sensors can operate at around 500oC, sapphire fiber sensors were demonstrated at even higher temperatures [3]. In this research, a novel sensor structure is proposed that can measure both pressure and temperature simultaneously. This work effort consists of design, fabrication, calibration, and laboratory testing of a novel structured temperature compensated pressure sensor. The aim of this research is to demonstrate an accurate temperature measurement, and pressure measurement using a composite Fabry-Perot interferometer. One interferometer measures the temperature and the other accurately measures pressure after temperature compensation using the temperature data from the first sensor.
Master of Science

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Książki na temat "Silica Tubes"

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United States. National Aeronautics and Space Administration., red. Influence of alumina reaction tube impurities on the oxidation of chemically-vapor-deposited silicon carbide. [Washington, DC: National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., red. Influence of alumina reaction tube impurities on the oxidation of chemically-vapor-deposited silicon carbide. [Washington, DC: National Aeronautics and Space Administration, 1995.

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Hawkes, Peter W. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1990.

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(Editor), Benjamin Kazan, red. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1993.

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Hawkes, Peter W. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1988.

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Hawkes, Peter W. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1990.

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(Editor), Benjamin Kazan, red. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1991.

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Hawkes, Peter W. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1986.

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Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1993.

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Hawkes, Peter W. Advances in Electronics and Electron Physics (Advances in Imaging and Electron Physics). Academic Press, 1986.

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Części książek na temat "Silica Tubes"

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Zaheer, Mohd Moonis, Varisha i Syed Danish Hasan. "Durability of mortar with nano silica and carbon nano-tubes in environment". W Recent Advances in Material, Manufacturing, and Machine Learning, 1266–74. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003370628-59.

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Prabhu, P. J. "A Review of the Effects of Silica on Stress Corrosion Cracking of Steam Generator Tubes". W Ninth International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors, 619–28. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118787618.ch64.

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Langner, Andreas, Frank Müller i Ulrich Gösele. "Macroporous Silicon". W Molecular- and Nano-Tubes, 431–60. Boston, MA: Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-9443-1_13.

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Montagnani, Giovanni Ludovico. "Development of a 3” LaBr3 SiPM-Based Detection Module for High Resolution Gamma Ray Spectroscopy and Imaging". W Special Topics in Information Technology, 77–82. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62476-7_7.

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AbstractGamma radiation detection finds many applications in different fields, including astrophysics, nuclear physics and medical diagnostics. Nowadays large Lanthanum Bromide crystals coupled to Photomultiplier Tubes (PMTs) represent the state of the art for gamma detection modules, in particular for spectroscopic measurements. Nevertheless, there is an interest in substituting photomultiplier tubes with solid state photodetectors like Silicon Photomultipliers (SiPMs), owing to the latter’s significant advantages. These include insensitivity to magnetic fields, low bias voltage, compactness, fast response and mechanical robustness. The aim of this thesis work, which was carried out within the context of the GAMMA project supported by IstitutoNazionale di FisicaNucleare (INFN), is the design, development and experimental characterization of a -ray spectrometer based on large Lanthanum Bromide scintillator crystals coupled with Silicon Photomultipliers. This detector specifications are compliant with nuclear physics experiments with energies ranging from 100 keV to 20 MeV, characterized by state-of-the-art energy resolution and imaging capability, in a compact, modular and robust structure. In order to perform the readout of large scintillator crystals, a matrix of 144 Silicon Photomultipliers was designed using NUV-HD SiPMs from Fondazione Bruno Kessler (FBK). These were chosen due to their high Photon Detection Efficiency in correspondence with the peak emission wavelength of the crystal, the high cell density and low Dark Count Rate.

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Gentile, M., i T. Abram. "Properties of Al2O3-CaO Glass Joints of Silicon Carbide Tubes". W Ceramic Materials for Energy Applications V, 11–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119211709.ch2.

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Horny, L., J. Kronek, H. Chlup, E. Gultova, L. Heller, R. Zitny i D. Vokoun. "Inflation-Extension Test of Silicon Rubber-Nitinol Composite Tube". W IFMBE Proceedings, 1027–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23508-5_267.

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Drieux, P., G. Chollon, A. Allemand i S. Jacques. "Chemical Vapor Deposition and Characterization of Thick Silicon Carbide Tubes for Nuclear Applications". W Ceramic Transactions Series, 87–98. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118744109.ch10.

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Mick, Hans Jürgen, i Paul Roth. "A Shock Tube Study of the Oxidation of Silicon Atoms by NO and CO2". W Shock Waves @ Marseille II, 47–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-78832-1_8.

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Thanganayaki, N., K. P. J. Reddy i V. Jayaram. "Oxidation Resistance Studies of Silicon Carbide Thin Film in a Free Piston-Driven Shock Tube". W 29th International Symposium on Shock Waves 2, 1431–36. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16838-8_103.

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Kita, Kenichiro, Masaki Narisawa, Hiroshi Mabuchi i Masayoshi Itoh. "Melt Spinnable Blend Polymers of Polycarbosilane and Polysiloxane for Synthesis of Silicon Carbide Micro Tube Structures". W Innovation in Ceramic Science and Engineering, 69–72. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-454-5.69.

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Streszczenia konferencji na temat "Silica Tubes"

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Asako, Yutaka, i Kenji Nakayama. "Effect of Compressibility on Gaseous Flows in a Micro-Tube". W ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47166.

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The product of friction factor and Reynolds number (f·Re) of gaseous flow in the quasi-fully developed region of a micro-tube was obtained experimentally and numerically. The tube cutting method was adopted to obtain the pressure distribution along the tube. The fused silica tubes whose nominal diameters were 100 and 150 μm, were used. Two-dimensional compressible momentum and energy equations were solved to obtain the flow characteristics in micro-tubes. The numerical methodology is based on the Arbitrary-Lagrangian-Eulerian (ALE) method. The both results agree well and it was found that (f·Re) is a function of Mach number.

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UNO, A., M. OGAI i K. MATSUBARA. "Mechanism of infrared loss increase caused by impurities contained in silica tubes". W Optical Fiber Communication Conference. Washington, D.C.: OSA, 1987. http://dx.doi.org/10.1364/ofc.1987.wa5.

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Yang, In-Hwan, i Mohamed S. El-Genk. "Viscous Dissipation in Laminar Water Flows in Micro-Tubes". W ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32497.

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Numerical calculations are performed to investigate the effect of viscous dissipation on the temperature rise and friction numbers for laminar water flows in micro-tubes. The calculated values are compared with those determined from reported experimental data for glass and diffused silica micro-tubes (D = 16 – 101 μm and L/D = 625 – 1479). The results confirm a definite slip at the wall with slip lengths of ∼ 0.7 μm and 1.0 μm, which decrease the friction number and the temperature rise in the micro-tubes, but their effect gradually diminishes as either D or L/D increases. The friction number decreases exponentially as D decreases and, to a lesser extent, as L/D increases. The effect of L/D on the friction number is insignificant for micro-tube diameters ≤ 20 μm. For D > 400 μm, the friction number approaches that of Hagen-Posieuille of 64 for macro-tubes when L/D > 1500, but approaches higher values at smaller L/D. The dimensionless analytical expression developed for calculating the friction number and the temperature rise for water flows in micro-tubes is in good agreement with both the numerical and experimental results.

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Tang, G. H., i Y. L. He. "An Experimental Investigation of Gaseous Flow Characteristics in Microchannels". W ASME 2004 2nd International Conference on Microchannels and Minichannels. ASMEDC, 2004. http://dx.doi.org/10.1115/icmm2004-2356.

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Gaseous flow characteristics in fused silica microtubes and square microchannels are studied experimentally. The existing works in the literature on experimental gaseous flow are analyzed. The data in fused silica micro circular tubes with diameters ranging from 50 μm to 201 μm and the data in fused silica micro square channels with hydraulic diameter ranging from 52 μm to 100 μm show that the flow friction factors are in good agreement with the theoretical prediction for conventional tubes and no distinguishable deviation is observed. The transition Reynolds number is around 2000 and a slight early transition from laminar to turbulent is observed due to the compressibility effect. For the helium flow in fused silica microtubes with inner diameters ranging from 10 μm to 20 μm, the decrease in friction factor is observed. In addition, factors including roughness, compressibility and rarefaction that may have significant effects on flow characteristics in microchannels are discussed.

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Watanabe, Keizo, Satoshi Ogata i Munehiko Hirao. "Flow Characteristics of Dilute Polymer Solutions in Micro Tubes". W ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37033.

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Pressure drops and velocity profiles for micro tubes were investigated for the laminar flow of distilled water and dilute polymer solutions. The test micro tubes were fused silica capillaries with diameters in the range of 50.2–251.8 μm, and a value of l/d (length/diameter) of about 340. By performing pressure drop measurements, it is shown that the experimental data agree well with the Hagen-Poiseuille equation in the case of Newtonian fluids. On the other hand, the flow rate of dilute polymer solutions increases relative to that of distilled water in the low Reynolds number range. The increased flow rate ratio is a maximum of about 15% in the case of d = 251.8 μm. For the result of the micro PIV measurement, however, there are few differences between the velocity profile of distilled water and the Peo 5 ppm solution.

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Bartoň, Ivo, Vlastimil Matějec, Jan Mrázek i Ondřej Podrazký. "Preparation and characterization of coatings with a high reflectivity on planar substrates and inside silica tubes". W Photonics Prague 2014, redaktorzy Pavel Tománek, Dagmar Senderáková i Petr Páta. SPIE, 2015. http://dx.doi.org/10.1117/12.2070253.

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Grogan, Kim, Richard Pearce i Darren M. Nightingale. "Kansas City Power and Light (KCP&L): Hawthorn Station, Unit #5 Modular Titanium Tubed Condenser Project — A Case Study". W ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/power2018-7563.

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Kansas City Power & Light’s (KCP&L) Hawthorn Unit #5 is a coal fired power plant that was originally built in 1969. In 2000, the condenser had new condenser tube bundles installed with Admiralty tubes during the Hawthorn rebuild project. An evaluation of the unit in 2014 identified the potential for the conversion from open to closed cycle cooling. At the same time of the evaluation, multiple failures, causing high silica (derates), required action again in 2016. With improvements in condenser technology, and after evaluation of all the options available — including investment payback — it was decided to rebundle the condenser once again to improve the heat transfer surface area, and to anticipate the (future) requirement for the unit to operate at a higher design pressure on the circulating water side. The current 1″ OD Admiralty Brass tubes and Muntz metal tube sheets were replaced with 7/8″ OD Titanium tubes and solid Titanium tube sheets. The waterboxes were also replaced with new carbon steel boxes, internally coated with a high solids epoxy lining, together with sacrificial anodes for cathodic protection. The new tube bundles and waterboxes were both designed for a higher design pressure. This was due to the possibility of a future cooling tower installation that would require an increased design pressure for the circulating water system. This Case Study Paper reviews the background to the requirement for new condenser tube bundles and waterboxes, compares the existing and replacement designs, reviews the installation process, and provides a summary of the project lessons learned. It is also intended to be of use to Plants that are considering changing from open to closed cooling cycle.

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Chatterjee, Sudip K., Suchita i Asha Bhardwaj. "Low-loss hollow core silica fiber with anti-resonant tubes for quantum state transmission in the visible regime". W Frontiers in Optics. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/fio.2021.jtu1a.47.

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Duron, Christopher M., Jie Zhong, Allan E. David, William R. Ashurst, Sushil H. Bhavnani, Jacob R. Morris i Andrew C. Bates. "Development of a Durable Vapor Phase Deposited Superhydrophobic Coating for Steam Cycle Power Generation Condenser Tubes". W ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3080.

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The condenser performance benefits afforded by dropwise condensation have long been unattainable in steam cycle power plant condensers due to the unavailability of durable and long lasting wetting inhibiting surface treatments. However, recent work in superhydrophobic coating technology shows promise that durable coatings appropriate for use on condenser tubes in steam cycle power generation systems may soon become a reality. This work presents a nano-scale, vapor phase deposited superhydrophobic coating with improved durability comprised of several layers of rough alumina nano-particles and catalyzed silica with a finishing layer of perfluorinated silane. This coating was applied to solid, hemi-cylindrical test surfaces fabricated from several common condenser tube materials used in power generation system condensers: Titanium, Admiralty brass, Cupronickel, and Sea Cure stainless steel condenser tube materials as well as 304 stainless steel stock. The development evolution of the coating and its effect on condensation behavior on the above materials are presented. Results show that the performance enhancement, measured in rate of heat transfer spikes corresponding to condensate roll-off events, was best for the titanium surface which produced 64% more events than the next most active material when coated using the most durable surface treatment tested in this work.

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John, T. J., i H. Hegab. "Experimental Study of Microbubble Formation in Micro Channel". W ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31155.

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The formation of unconfined spherical microbubbles in a micro channel is investigated in this study. A liquid channel (primary channel) and a gas channel (secondary channel) which is perpendicular to each other form a T-Junction where the microbubbles are formed. Fused silica tubes of 20μm inner diameter and 360μm outer diameter is used as the secondary channel. The hydraulic diameter of the liquid channel is varied to study its effect on the bubble formation. Because of the small size of the gas orifice compared to the hydraulic diameter of the liquid channel the microbubbles formed are completely spherical, thus giving enough facility to study its formation and detachment criteria. The microbubble formation inside the micro channel is studied subjected to variable parameters such as liquid flow rate, gas flow rate, and the hydraulic diameter of the liquid channel. Silicon wafer subjected to dry etching techniques is used to make both the primary micro channels and channels which holds the fused silica tube (secondary channel). A glass piece is anodically bonded to the silicon wafer which seals both the channel from the top. Holes are drilled on to the glass piece to provide the inlet and outlet of the channels and the T-junction is continuously monitored using an Olympus i-speed camera capable of taking 10000 frames per second. Di ionized water is used as the liquid and nitrogen is used as the gas for bubble formation. The results obtained show that the bubble diameter decreases with the increase in the liquid flow rate, and decrease in hydraulic diameter of the liquid channel. The gas flow rate does not have any effect on the bubble diameter, as the gas flow rate was increased the frequency of the bubble formation increases.

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Raporty organizacyjne na temat "Silica Tubes"

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Walker, Matthew, Kenneth Miguel Armijo, Julius Yellowhair, Clifford K. Ho, Amy Bohinsky, Jeff Halfinger i Herb Feinroth. High Temperature Silicon Carbide Receiver Tubes for Concentrating Solar Power. Office of Scientific and Technical Information (OSTI), styczeń 2019. http://dx.doi.org/10.2172/1493845.

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Kazkaz, K., i T. Stiegler. Replacing photomultiplier tubes with silicon photomultipliers for nuclear safeguards applications. Office of Scientific and Technical Information (OSTI), październik 2020. http://dx.doi.org/10.2172/1682525.

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Boss, D. E. Corrosion resistant coatings for silicon carbide heat exchanger tubes -- Volume 3. Final report. Office of Scientific and Technical Information (OSTI), czerwiec 1996. http://dx.doi.org/10.2172/629430.

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Loutfy, R. O., J. C. Withers i D. Chakravarti. Product technology and market assessment for silicon carbide whisker reinforced alumina heat-exchanger tubes. Final report. Office of Scientific and Technical Information (OSTI), październik 1993. http://dx.doi.org/10.2172/10119224.

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Sweany, Melinda, Peter Marleau i Gene A. Kallenbach. Characterization of a Silicon photo-multiplier summing breakout board for photo-multiplier tube replacement. Office of Scientific and Technical Information (OSTI), styczeń 2019. http://dx.doi.org/10.2172/1493837.

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Raftery, Alicia M., Christian M. Petrie, Gregory John Hirtz, Yutai Katoh i Kory D. Linton. Completion of the Irradiation of Silicon Carbide Cladding Tube Specimens in the High Flux Isotope Reactor. Office of Scientific and Technical Information (OSTI), maj 2018. http://dx.doi.org/10.2172/1439144.

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Koyanagi, Takaaki, i Christian M. Petrie. Assembly and Delivery of Rabbit Capsules for Irradiation of Silicon Carbide Cladding Tube Specimens in the High Flux Isotope Reactor. Office of Scientific and Technical Information (OSTI), wrzesień 2017. http://dx.doi.org/10.2172/1394375.

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