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Journal articles on the topic 'Fibre quartz'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Anzivino, G., Yu Chumarovsky, A. Contin, M. Danilov, G. Dellacasa, R. DeSalvo, V. Gavrilov, et al. "Quartz fibre calorimetry — Monte Carlo simulation." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 357, no. 2-3 (April 1995): 380–85. http://dx.doi.org/10.1016/0168-9002(94)01704-2.

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2

Anzivino, G., Yu Chamorovskii, A. Contin, M. Danilov, G. Dellacasa, R. DeSalvo, V. Gavrilov, et al. "Recent developments in quartz fibre calorimetry." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 357, no. 2-3 (April 1995): 369–79. http://dx.doi.org/10.1016/0168-9002(94)01705-0.

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3

Ruotsalainen, Marjo, Maija-Riitta Hirvonen, Kirsi Luoto, and Kai M. Savolainen. "Production of reactive oxygen species by man-made vitreous fibres in human polymorphonuclear leukocytes." Human & Experimental Toxicology 18, no. 6 (June 1999): 354–62. http://dx.doi.org/10.1191/096032799678840228.

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Human polymorphonuclear leukocytes (PMNL) or erythrocytes, isolated from human blood, were exposed to graded doses of asbestos (chrysotile), quartz, or man-made vitreous fibres (MMVF), i.e. refractory ceramic fibres (RCF), glasswool, or rockwool fibres. None of the MMVF affected either the viability of PMNL, as measured by trypan blue exclusion test, or induced haemolysis, whereas the positive controls, quartz and chrysotile, dose-dependently induced haemolysis in PMNL. MMVF did not increase the release of lactate dehydrogenase (LDH) from the PMNL, whereas the positive controls, chrysotile and quartz, induced a marked and dose-dependent release of LDH. When PMNL were exposed to MMVF, some of the fibre types slightly increased the levels of free intracellular calcium ([Ca2+]i)withinthecellsina manner similar to that induced by chrysotile or quartz. All MMVF induced a dose-dependent production of reactive oxygen species (ROS) in PMNL, with RCF-induced production of ROS being the most marked. Production of ROS by MMVF seemed to depend on the availability of extracellular calcium because it could be attenuated with aCa2+ channel blocker, verapamil, or a Ca2+ chelating agent, EGTA. Production of ROS may be a common pathway through which PMNL respond to MMVF-induced cell activation, but alterations of levels of free intracellular Ca2+ do not seem to be an absolute prerequisite for this effect. Fibre length seemed not to be an important factor in affecting the ability of MMVF to induce ROS production in PMNL. However, the balance between different elements in the fibre seemed importantly to affect the biological activity of a fibre.

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4

Tammela, S., P. Kiiveri, and P. Pöyhönen. "Modal field transforming quartz single-mode fibre." Electronics Letters 24, no. 8 (1988): 500. http://dx.doi.org/10.1049/el:19880340.

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5

Vlassov, S., O. Scheler, M. Plaado, R. Lõhmus, A. Kurg, K. Saal, and I. Kink. "Integrated carbon nanotube fibre–quartz tuning fork biosensor." Proceedings of the Estonian Academy of Sciences 61, no. 1 (2012): 48. http://dx.doi.org/10.3176/proc.2012.1.06.

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6

Sharmila, S., and P. Chandrasekaran. "Performance evaluation of high performance concrete beams under cyclic loading." International Journal of Engineering & Technology 7, no. 1.1 (December 21, 2017): 71. http://dx.doi.org/10.14419/ijet.v7i1.1.8926.

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High performance concrete essentially consists of the same ingredients as in conventional concrete but the proportions are designed to provide the strength and durability which are needed for the structural and environmental requirements of the structure. Fiber-reinforced concrete is a concrete containing ingredients of conventional concrete and fibres which increases its structural integrity. Fibers act as crack arrester which are primarily due to plastic shrinkage and drying shrinkage. They also reduce the permeability of concrete. The main aim of the present experimental investigation is to combine different fibres namely crimped stainless steel fibre and Aramid fibre to produce HFRC and thus to evaluate its mechanical performance. In Addition Micro silica and Quartz powder is added to obtain high performance. Based on I.S. Code method of mix design, proportion of different ingredients was obtained to get M60 grade concrete. Samples were prepared by varying the volume fraction of Steelfibre and aramid fibre from 0 to 1.5%. Three specimens of Cubes, Cylinders, and Prisms for each volume fraction of fibers are casted. Mechanical properties of each concrete composite were studied. The structural parameters such as load carrying capacity, ductility characteristics and energy absorption capacity of HPHFRC beams were assessed.

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7

Annamaneni, Krishna Kiran, Bhumika Vallabhbhai Dobariya, and Krasnikovs Andrejs. "CONCRETE, REINFORCED BY CARBON FIBRE COMPOSITE STRUCTURE, LOAD BEARING CAPACITY DURING CRACKING." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 2 (June 17, 2021): 232–37. http://dx.doi.org/10.17770/etr2021vol2.6655.

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Different authors conducted studies on fiber reinforced concretes (FRC) with carbon fibres of different lengths and some results showed that concrete mix with homogeneously distributed short fibres in their volume have good strength and ultra-strain compared to normal plain concrete mix. However, this study is focused more on 3-dimensional (3D) carbon fibre reinforced plastic (epoxy) CFRP composite thin rods frame used as a reinforcement in concrete which shows good increase in loadbearing and ductility. Were investigated concrete mixes with superplasticizer, nano-silica, quartz sand, fine natural sand and gravels. Diagonal cross bracing carbon fibre epoxy frames were used as a reinforcement giving better ductility results. Proposed study approach is to show that the reinforced concrete with provided materials have an increased performance in terms of ductility, sustainability, and load bearing in cracked statement. Total, four groups of concrete and each group with three beams were casted and tested in this experiment, three groups with three different shapes of carbon frames and three beams without frames to compare the mechanical properties after 28 days. Failure mechanisms in any particular case were analysed.

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8

Eichler, H. J., J. Kunde, and B. Liu. "Quartz fibre phase conjugators with high fidelity and reflectivity." Optics Communications 139, no. 4-6 (July 1997): 327–34. http://dx.doi.org/10.1016/s0030-4018(97)00135-1.

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9

Seyam, Ahmed Maher, Samir Shihada, and Rita Nemes. "Effects of polypropylene fibers on ultra high performance concrete at elevated temperature." Concrete Structures 21 (2020): 11–16. http://dx.doi.org/10.32970/cs.2020.1.2.

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This paper presents an experimental study to evaluate the influence of polypropylene on fire resistance of ultra-high performance concrete (UHPC). Concrete mixtures are prepared by using different percentages of polypropylene fibres 0%, 0.75% and 1.5%, by volume. Samples are heated to 250 or 500 °C, for exposures 2.5 or 5 hours, and tested after cooling for compressive strength and flexural tensile strength. The research includes the use of mineral admixture of a recognized, polypropylene fibre, quartz sand, superplasticizers and without using any type of aggregates other than the quartz sand. The effect on subjected samples to elevated temperature up to 250 ºC and 500 ºC for durations 2.5 hours and 5 hours was studied for each mix and comparing the results of compressive strength and tensile strength among the mixes. Results obtained, showed that adding 0.75% of polypropylenes fibres only to a concrete mixture, improved the fire resistance of the concrete by 27% and 72% when the samples exposed to 250 ºC and 500 ºC for 2.5 hours respectively, compared with concrete mixes without fibres. In addition, the residual strength was improved by 39% and 14% when the samples exposed to 250 ºC and 500 ºC for 5 hours, respectively.

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10

Vearncombe, J. R. "Structure of veins in a gold–pyrite deposit in banded iron formation, Amalia greenstone belt, South Africa." Geological Magazine 123, no. 6 (November 1986): 601–9. http://dx.doi.org/10.1017/s0016756800024110.

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AbstractFibrous quartz veins in deformed banded iron formation of the Amalia greenstone belt, southwestern Transvaal, are spatially related to gold–pyrite mineralization in both wallrock and vein inclusions. Poles to quartz vein orientations show a general parallelism with mineral elongation and fold plunges of the principal deformation in the wallrock. Quartz vein fibres show a consistent anticlockwise rotation, late components being subparallel to the elongation lineation, suggesting veining was probably synchronous with the principal deformation. Antitaxial fibrous veins, which dominate the mineralized banded iron formation, formed by the process of crack–seal which channelled mineralizing fluids along the vein walls, increasing the potential for fluid–wallrock interaction. Gold mineralization in quartz veins occurs in wall-parallel slivers of banded iron formation which have been plucked off the vein wall during antitaxial fibre growth. Mineralization can be explained by a process of fluid–wallrock interaction with sulphidation and gold precipitation.

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11

Sen, Abhishek, Biswanath Doloi, and Bijoy Bhattacharyya. "An experimental investigation into fibre laser micro-drilling of quartz." International Journal of Mechatronics and Manufacturing Systems 11, no. 2/3 (2018): 182. http://dx.doi.org/10.1504/ijmms.2018.092874.

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12

Bhattacharyya, Bijoy, Biswanath Doloi, and Abhishek Sen. "An experimental investigation into fibre laser micro-drilling of quartz." International Journal of Mechatronics and Manufacturing Systems 11, no. 2/3 (2018): 182. http://dx.doi.org/10.1504/ijmms.2018.10013934.

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13

Athley, Karin, Lars Granlöf, Daniel Söderberg, Mikael Ankerfors, and Göran Ström. "Mechanical retention – Influence of filler floc size and grammage of the fibre web." Nordic Pulp & Paper Research Journal 27, no. 2 (May 1, 2012): 202–7. http://dx.doi.org/10.3183/npprj-2012-27-02-p202-207.

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Abstract An investigation of the impact of particle size on the mechanical retention of particles in a fibre network has been conducted. The particles used were five sets of quartz particle fractions having fairly narrow particle size distributions with average particle size ranging from a few μm to around 100 μm. The particles were used to model flocculated filler aggregates as part of a larger study of the effect of pre-flocculation on mechanical retention. Pre-flocculation of the filler is a possible strategy to increase the filler content of paper without deterioration of strength properties. A modified laboratory hand sheet former, known as the Rapid Drainage Device (RDD) was used. The major modification consisted of a long pipe that acted as a suction leg, which provides a dewatering vacuum at the same level as on a paper machine. The experimental results showed that mechanical filler retention increased linearly with particle size and grammage of the fibre layer above a critical grammage which depended on particle size. The linear relation was also seen in a pilot scale trial on the FEX pilot-paper machine at Innventia. During this trial fine paper was produced using pre-flocculated filler where the mean particle size of the flocs and fibres was measured in the flow to the headbox. The results from this pilot trial show that mechanical retention is an important part of the total filler retention. Drainage time and therefore drainage resistance increased with the grammage of the fibre layer and amount of quartz particle added. Drainage time, compared at total grammage (i.e. the sum of fibre and quartz particle grammage) was lowest for a fraction of medium-sized particles, with a median size of 35 mm. There was no obvious effect on retention or drainage resistance of a change in the dewatering pressure from 27.5 to 41.5 kPa.

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14

Lee, William E., and H. Gail Thompson. "Detection of Newcastle disease virus using an evanescent wave immuno-based biosensor." Canadian Journal of Chemistry 74, no. 5 (May 1, 1996): 707–12. http://dx.doi.org/10.1139/v96-076.

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A fibre-optic-based evanescent wave biosensor has been used for the detection of virus. Polyclonal antibody directed against the model analyte, Newcastle disease virus, was covalently immobilized on aminosilane-coated quartz fibres, which served as the capture and concentration element of the sensor system. Radiolabelling studies demonstrated a high degree of antibody attachment to the quartz solid support. Maximal coverage could be attained with antibody solution as low as 10 μg/mL and carbonyldiimidazole as the cross-linking agent. Fluorescein-labelled anti-NDV served as the detector antibody in a sandwich format. Assay times were approximately 15 min with a limit of detection of about 2 ng of purified virus in 0.2 mL sample volume. The biosensor detection system possesses several desirable characteristics such as a limited number of mechanical components, a multiple use active surface, and low baseline variation, which indicate that it has the potential to serve as an on-line continuous monitoring device of an automated or semi-automated detection system. Key words: fibre optic, biosensor, fluorescence, evanescence, immunoassay, antibody, Newcastle disease virus.

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15

Lu, Taijing, X. Zhang, Ichiro Sunagawa, and G. W. Groves. "Nanometre scale textures in agate and Beltane opal." Mineralogical Magazine 59, no. 394 (March 1995): 103–9. http://dx.doi.org/10.1180/minmag.1995.59.394.09.

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AbstractWe have carried out TEM observations of agates of geode origin and Beltane opals. Optically observable individual fibres in agates are composed of many fine fibres which consist of quartz crystallites of 8 to 100 nm in length stacked together parallel to <110> or <100> with c-axes perpendicular to the fibre elongation. The optically observable systematic striations in agate are found to consist of cyclic alternation of layers due to variation in grain size and porosity. Large quartz crystals, protruding into the spaces of geodes, represent the last stage of formation of these bands, and are merely a continuation of the banding sequence. Nanometre scale textures of cristobalite fibres were revealed in Beltane opals. The cristobalite crystallites have the size of 3 to 20 nm in length and are also stacked together. Our TEM results suggest that embryonic particles were formed in their corresponding growth environments and agglutinated to form fibres.

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16

Visco, Anna Maria, L. Calabrese, Nino Campo, A. Bonavita, and Lorenzo Torrisi. "Pull-Out Strength Analysis of Quartz Fibre Posts in Dental Implants." Advances in Science and Technology 49 (October 2006): 130–35. http://dx.doi.org/10.4028/www.scientific.net/ast.49.130.

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In order to rebuild the decayed teeth it’s necessary to re-establish the elastic properties of lost dental tissues, replacing them with restorative materials. A not corrected reconstructive method in the dental implant could reduce the mechanical performance causing its progressive premature failure. In this work composite materials, based on quartz fibers posts and adhesive resins, were employed with the aim to restore damaged teeth. Two groups of extracted teeth were rebuilt with two different techniques. In the first group of samples (A) the fiber quartz post and the adhesive resins were simply located into the dental implant and then cured by a light source. In the second group (B) the post and the resin were in situ preformed and then photo-cured; the pre-formed post was then cemented to the tooth with the same procedure of the group A. The two different types of dental restorations were mechanically characterized with a pull-out test with an universal testing machine (Lloyd LR10K). The experimental results showed that the B group samples have an higher mechanical strength than the A group samples, evidencing a better interface adhesion between post– adhesive–tooth. The difference of means of pull out stress data was statistically confirmed by the ANOVA method.

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17

Gao, S. Q., X. Ch Wang, A. J. Hu, Y. L. Zhang, and S. Y. Yang. "Preparation and Properties of PMR-II Polyimide/Chopped Quartz Fibre Composites." High Performance Polymers 12, no. 3 (September 2000): 405–17. http://dx.doi.org/10.1088/0954-0083/12/3/304.

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18

Magalhães, Flávia, Eduardo Ferreira, Lidiane Bessa, Costa Dias, Adeodato Vieira, and Miria Reis. "Fabrication of kaolin hollow fibre membranes for bacteria removal." Processing and Application of Ceramics 14, no. 4 (2020): 303–13. http://dx.doi.org/10.2298/pac2004303m.

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This study examines the influence of the particle size, extrusion rate and sintering temperature on the characteristics of kaolin hollow fibre membranes. In addition, the produced membranes were applied for bacteria removal from an aqueous suspension. The milling process reduced the size of kaolin particles from 8.7 to 5.1 ?m and greatly enhanced the morphology and mechanical resistance of the produced membranes. The increase in the sintering temperature up to 1250?C caused crystallographic phase modifications in the crude kaolin, which were mainly assigned to transformations of quartz and kaolinite to mullite and cristobalite phases. The fibres sintered at 1250?C have bending strength of 145MPa, but this relatively high sintering temperature caused a substantial particle densification and drastic decrease of the membrane water permeability. The kaolin hollow fibre membranes enabled almost total removal of the Enterobacter bacteria from an aqueous suspension.

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19

Magalhães, Flávia, Eduardo Ferreira, Lidiane Bessa, Costa Dias, Adeodato Vieira, and Miria Reis. "Fabrication of kaolin hollow fibre membranes for bacteria removal." Processing and Application of Ceramics 14, no. 4 (2020): 303–13. http://dx.doi.org/10.2298/pac2004303m.

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This study examines the influence of the particle size, extrusion rate and sintering temperature on the characteristics of kaolin hollow fibre membranes. In addition, the produced membranes were applied for bacteria removal from an aqueous suspension. The milling process reduced the size of kaolin particles from 8.7 to 5.1 ?m and greatly enhanced the morphology and mechanical resistance of the produced membranes. The increase in the sintering temperature up to 1250?C caused crystallographic phase modifications in the crude kaolin, which were mainly assigned to transformations of quartz and kaolinite to mullite and cristobalite phases. The fibres sintered at 1250?C have bending strength of 145MPa, but this relatively high sintering temperature caused a substantial particle densification and drastic decrease of the membrane water permeability. The kaolin hollow fibre membranes enabled almost total removal of the Enterobacter bacteria from an aqueous suspension.

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20

Issaev, V., and N. Oreshnikova. "EXTRACTION OF CRISTOBALITE FROM MILKY-WHITE FORMS OF QUARTZ STUFF1." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (June 27, 1997): 35. http://dx.doi.org/10.17770/etr1997vol1.1859.

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Natural quartz is one of die main sources of getting a unique material - quartz glass. Wide application of quartz glass in chemical and electronic industry, aviation and cosmonautics, fibre optics and computer techniques makes it absolutely indispensable. However, industrial reserves of rock-chrystal lodes, that is die most pure source of quartz stuff with minimal mineral admixturer, are practically exhausted everywhere. All this results in usage of.low quality stuff and, thus, to significant complication of technological schemes of quartz processing and concentration, to high energy waste, high waste of inorganic acids, significant increase of industrial waste. Quartz concentrate output according to traditional technologies of lode quartz processing on Urals deposits is not more then 35%. In this turn the part of defectless transparent quartz glass when smelting from granular quartz is not more then .30%. It is evident that low efficiency of quartz industry call to new scale technological decisions. 1

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21

Sudhamsu, S. "Experimental Investigation on Hybrid Fibre by Using Silica Fume and Quartz Powder." International Journal for Research in Applied Science and Engineering Technology V, no. XI (November 23, 2017): 2892–904. http://dx.doi.org/10.22214/ijraset.2017.11399.

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22

Ferrando, A., M. C. Fouz, M. I. Josa, A. Khan, A. Rosowsky, and J. M. Salicio. "A compensating quartz fibre calorimeter for small angle calorimetry at the LHC." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 390, no. 1-2 (May 1997): 63–78. http://dx.doi.org/10.1016/s0168-9002(97)00393-8.

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23

Williams, Sidney A., and Fabien P. Cesbron. "Wupatkiite from the Cameron Uranium District, Arizona, a new member of the halotrichite group." Mineralogical Magazine 59, no. 396 (September 1995): 553–56. http://dx.doi.org/10.1180/minmag.1995.059.396.16.

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AbstractWupatkiite (Co,Mg,Ni)Al2(SO4)4.22H2O is a new member of the halotrichite group. It occurs 8 miles ESE of Gray Mountain, Arizona, near the prehistoric pueblo dwelling Wupatki. It occurs as cross-fibre veinlets with fibres up to 8mm long. Colour: empire rose (RHS48C), streak white, H. = 1 ½. G = 1.92, D(calc) = 1.87g/cm3. Nonpleochroic with α = 1.477, γ = 1.484, Z^fibre axis = 12°. Wet chemistry gave MgO 1.63, CaO 0.10, MnO 0.17, FeO 0.15, NiO 0.52, CuO 0.12, CoO 3.41, Al2O3 11.30, SO3 35.97, H2O 42.26 (total 95.63%); rem. = montmorillonite and quartz. Parameters refinedo from the powder pattern are close to those of halotrichite. Wupatkiite is monoclinic P21/c with a = 6.189 Å, b = 24.23 Å, c = 21.20 Å, β = 100.33°. Strongest lines are 4.790, 100 (024); 4.295, 27 (140); 3.945, 26 (025); 3.768, 33 (062); 3.494, 92 (124, 063).

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24

Sohara, Koki, Katsuya Yamauchi, Xu Sun, Kazuhiro Misawa, and Yoshika Sekine. "Photocatalytic Degradation of Polycyclic Aromatic Hydrocarbons in Fine Particulate Matter (PM2.5) Collected on TiO2-Supporting Quartz Fibre Filters." Catalysts 11, no. 3 (March 22, 2021): 400. http://dx.doi.org/10.3390/catal11030400.

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Airborne fine particulate matter (PM2.5) pollution is known to have adverse effects on human health, and owing to their carcinogenic and mutagenic nature, polycyclic aromatic hydrocarbons (PAHs) are of particular concern. This study investigated the effect of ultraviolet (UV)-induced photocatalysis on the degradation of PAHs in PM2.5, employing titanium dioxide (TiO2)-supporting quartz fibre filters. A TiO2 layer was formed on the quartz fibre filters, and airborne PM2.5 was collected using an air sample at a flow rate of 500 L/min for 24 h. The PM2.5 samples were subsequently irradiated with ultraviolet rays at 1.1 mW/cm2. The amounts of nine targeted PAHs (phenanthrene, PHE; anthracene, ANT; pyrene, PYR; benzo[a]anthracene, BaA; chrysene, CHR; benzo[b]fluoranthene, BbF; benzo[k]fluoranthene, BkF; benzo[a]pyrene, BaP; and benzo[g,h,i]perylene, BgP) gradually decreased during the treatment, with half-lives ranging from 18 h (PHE) to 3 h (BaP), and a significantly greater reduction was found in comparison with the PAHs collected in the control (non-TiO2 coated) quartz fibre filters. However, the degradation rates were much faster when the PAHs were in direct contact with the TiO2 layer. As PM2.5 is a mixture of various kinds of solids, co-existing components can be a rate-determining factor in the UV-induced degradation of PAHs. This was demonstrated by a remarkable increase in degradation rates following the removal of co-existing salts from the PM2.5 using water treatment.

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25

Akchurin, N., S. Ayan, Gy L. Bencze, K. Chikin, H. Cohn, S. Doulas, I. Dumanŏglu, et al. "Test beam of a quartz-fibre calorimeter prototype with a passive front section." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 400, no. 2-3 (December 1997): 267–78. http://dx.doi.org/10.1016/s0168-9002(97)01003-6.

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26

Bai, Huizhen, Xun Sun, Haitao Liu, Lingwei Yang, Wenzhi Huang, and Zhen Wang. "A novel quartz fibre reinforced dense polyimide matrix composite: effect of preform stitching." Plastics, Rubber and Composites 48, no. 9 (June 25, 2019): 384–88. http://dx.doi.org/10.1080/14658011.2019.1633820.

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27

Fuentes, L. "Anomalous Scattering and Null-Domain Ghost Corrections for Fibre Textures." Textures and Microstructures 10, no. 4 (January 1, 1989): 347–60. http://dx.doi.org/10.1155/tsm.10.347.

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The practical applicability of anomalous scattering and null-domain ghost corrections for fibre textures is theoretically evaluated. For a hypothetical asymmetric orientation distribution of quartz-like BPO4 highly absorpting crystals, slightly asymmetric anomalous scattering pole figures are predicted. On the basis of projection relations among orientation distribution functions and inverse pole figures, the special characteristics of the null-domain method for fibre textures are discussed, with the suggestion of a practical procedure to estimate (in favourable cases) an upper limit for ghosts effects.

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28

Heimbs, Sebastian, Tim Wagner, Heinz Meister, Clemens Brand, and Mircea Calomfirescu. "Bird strike on aircraft radome: Dynamic characterisation of quartz fibre composite sandwich for accurate, predictive impact simulations." EPJ Web of Conferences 183 (2018): 01007. http://dx.doi.org/10.1051/epjconf/201818301007.

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This study assesses the bird strike resistance of the satellite communication (SatCom) radome of a medium altitude, long endurance (MALE) remotely piloted aircraft system (RPAS), which is designed as a lightweight sandwich structure with thin quartz fibre composite skins and a cellular honeycomb core. In order to perform accurate, predictive numerical bird strike simulations, the building block approach was applied, involving extensive experimental characterisation and model validation of the materials and structures from simple coupon level up to full-scale radome level. Coupon tests of the quartz fibre composite skin material under high-rate dynamic loading revealed significant strain rate effects, which needed to be taken into account in the simulation model in order to predict the structural response under high-velocity bird strike loading. In summary, this work presents a systematic and detailed approach for obtaining validated modelling methods for high-velocity impact analyses, which could be used efficiently for various design and parameter studies during the development of the SatCom radome.

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29

MacKay, R., A. Aitkenhead, and M. Hardy. "SU-FF-T-355: Investigation of Doped Quartz Fibre Detectors for Radiotherapy Dosimetry Applications." Medical Physics 36, no. 6Part14 (June 2009): 2603. http://dx.doi.org/10.1118/1.3181836.

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30

Haupt, O., B. Klaue, C. Schaefer, and W. Dannecker. "Preparation of quartz fibre filter standards for x-ray fluorescence analysis of aerosol samples." X-Ray Spectrometry 24, no. 5 (September 1995): 267–75. http://dx.doi.org/10.1002/xrs.1300240511.

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31

Castellanos-Gomez, A., N. Agraït, and G. Rubio-Bollinger. "Carbon fibre tips for scanning probe microscopy based on quartz tuning fork force sensors." Nanotechnology 21, no. 14 (March 11, 2010): 145702. http://dx.doi.org/10.1088/0957-4484/21/14/145702.

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32

Parmer, J. F., J. J. Zupancic, and D. J. Wissuchek. "Electron paramagnetic resonance studies of interfacial solvent absorption in quartz fibre-reinforced epoxy composites." Composites 25, no. 7 (January 1994): 516–23. http://dx.doi.org/10.1016/0010-4361(94)90179-1.

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33

Ke, Jie, Yolanda Sánchez-Vicente, Geoffrey R. Akien, Alexander A. Novitskiy, Gurbuz Comak, Victor N. Bagratashvili, Michael W. George, and Martyn Poliakoff. "Detecting phase transitions in supercritical mixtures: an enabling tool for greener chemical reactions." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, no. 2122 (July 28, 2010): 2799–818. http://dx.doi.org/10.1098/rspa.2010.0267.

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Detecting phase transitions in high-pressure CO 2 and supercritical fluids was first attempted in the nineteenth century. By contrast, Green Chemistry, the design and implementation of cleaner methods of manufacturing and processing chemicals, is barely 20 years old. Now, the use of CO 2 as an environmentally more acceptable replacement for traditional solvents for greener chemical reactions is creating the need for new, more rapid methods for elucidating high-pressure phase behaviour. This paper describes the advantages and limitations of a number of approaches, developed in Nottingham, to meet this need, including acoustic measurements, shear-mode quartz sensors, the fibre-optic reflectometer, the use of holey fibres, attenuated total reflectance infrared spectroscopy and pressure drop measurements.

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Makonese, T., P. Forbes, L. Mudau, and H. J. Annegarn. "Aerosol particle morphology of residential coal combustion smoke." Clean Air Journal 24, no. 2 (December 3, 2014): 24–28. http://dx.doi.org/10.17159/caj/2014/24/2.7064.

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A study carried out at the University of Pretoria characterised aerosol particle morphology of residential coal combustion smoke. The general approach in this study was on individual particle conglomerations because the radiative, environmental, and health effects of particles may depend on specific properties of individual particles rather than on the averaged bulk composition properties. A novel, miniature denuder system, developed and tested at the University of Pretoria, was used to capture particle emissions from the coal fires. The denuder consists of two silicone rubber traps (for gas phase semi-volatile organic compound monitoring) in series separated by a quartz fibre filter (for particle collection). The denuders were positioned 1 m away from the fire and were connected to pumps that sampled ~5 litres of air over a 10 min sampling interval. A JSM 5800LV Scanning Electron Microscope with a Thermo Scientific EDS was used to analyse the structure and morphology of different aerosol samples from the quartz fibre filters. Eight samples from the different fire lighting methods were selected for SEM analysis. The punched samples were sputter coated with gold for ~15 minutes using a K550 Emitech Sputter Coater. Results show that apart from the fine and ultra-fine particles, coal smoke from domestic burning also contains aerosols greater than 5 μm in diameter. Consequently, we describe the potential for generation of ‘giant’ carbonaceous soot conglomerates with outer diameters of 5 to 100 μm. However, the exact mechanism for formation of such large soot conglomerates remains to be determined. We also describe the presence of spherules and solid ‘melted toffee’ irregular surfaces. Circumstantial evidence is used to postulate and discuss the possible modes of formation in terms of condensation, and partial melting. This work provides a description of the modes of formation and transformation of conglomerates originating from low temperature (<8000C) coal combustion.

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Wang, Xi Feng, Dang Cong Peng, and Xiao Lian Hu. "A TiO₂/Fe³⁺ Coated on Fibre Glass Treatment for Phenol with UV Irradiation." Advanced Materials Research 472-475 (February 2012): 561–64. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.561.

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This paper reported the study of the photocatalytic activity of immobilized Fe3+ doped TiO2 on glass fibre yarn. A dip-coating technique fixing catalyst onto the support surface was applied to get the TiO2/Fe3+ coated filler. A photo reactor consists of a cylindrical quartz tube and filler with the immobilized catalyst was applied in the study. The photocatalytic activity was determined by the degradation of phenol in water (10 mg L-1). Results suggested that the fibre glass coated TiO2/Fe3+ photocatalysis filler has very excellent performances in repeat using and the supported TiO2 was very stable in photocatalysis reaction.

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Chen, Shu Tian, Xiao Xia Fan, and Yong Gang Yan. "Study on Biomechanical Properties of Quartz Fiber Reinforcd n-HA/PA66 Composites." Advanced Materials Research 662 (February 2013): 64–67. http://dx.doi.org/10.4028/www.scientific.net/amr.662.64.

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Quartz Fibre/nano-Hydroxyapatite/Polyamide 66(QF/n-HA/PA66) composite was prepared by extrusion molding method. The QF is well dispersed in the nano-hydroxyapatite/polyamide 66 matrix and some interaction and new interface formed between QF and n-HA/PA66. Tensile strength, compressive strength and flexural strength of the 38wt%QF/n-HA/PA66 composite reached 81 MPa, 190 MPa and 195 MPa, which were higher than those of human cortical bone. Mechinical properties were improved with the increasing of QF content and QF well enhanced biomechanical properties of the composite. Based on the excellent biomechanical properties of composites, the long load-bearing thigh bone substitute was fabricated for tumour infected thigh bone patient.

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Kawata, Kuniaki, Megumi Minagawa, Yoshimaru Fujieda, and Akio Yasuhara. "Sampling method of organotin compounds in air using a quartz-fibre filter and an activated carbon-fibre filter for gas chromatographic determination." Journal of Chromatography A 653, no. 2 (November 1993): 369–73. http://dx.doi.org/10.1016/0021-9673(93)83198-2.

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Wang, R. L., F. W. Liu, S. C. Wang, R. L. Wang, M. G. Xia, B. Sun, and M. F. Zhu. "Surface modification of quartz fibre and its reinforced bis-GMA/MMA composites for dental post." Materials Research Innovations 18, sup4 (July 2014): S4–859—S4–863. http://dx.doi.org/10.1179/1432891714z.000000000792.

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Chen, Z. M., S. X. Jiang, R. H. Guo, B. J. Xin, and D. G. Miao. "Influence of annealing temperature on microstructure and luminescent properties of Y2O3: Eu3+deposited quartz fibre." Materials Technology 31, no. 1 (January 2, 2016): 7–12. http://dx.doi.org/10.1179/1753555715y.0000000016.

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Misawa, Kazuhiro, Yoshika Sekine, Yuki Kusukubo, and Koki Sohara. "Photocatalytic degradation of atmospheric fine particulate matter (PM2.5) collected on TiO2 supporting quartz fibre filter." Environmental Technology 41, no. 10 (October 9, 2018): 1266–74. http://dx.doi.org/10.1080/09593330.2018.1530696.

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Laitinen, T., H. Revitzer, and M. Tolvanen. "Trace metal analysis of coal fly ash collected plain and on a quartz fibre filter." Analytical and Bioanalytical Chemistry 354, no. 4 (February 1, 1996): 436–41. http://dx.doi.org/10.1007/s0021663540436.

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Ogrizek, Monika, Radojko Jaćimović, Martin Šala, and Ana Kroflič. "No more waste at the elemental analysis of airborne particulate matter on quartz fibre filters." Talanta 226 (May 2021): 122110. http://dx.doi.org/10.1016/j.talanta.2021.122110.

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P, Jeganmurugan, Rakesh Senthil Kumar G V, Sivasharmina M, Sowmiya S, and Vasanthan M. "Experimental Study on Reactive Powder Concrete under Flexural Loading." International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 552. http://dx.doi.org/10.14419/ijet.v7i2.24.12505.

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Reactive powder concrete (RPC) is ultra high strength with advanced mechanical properties. Reactive powder concrete is a concrete without coarse aggregate, contains cement, silica fume, quartz sand, quartz powder, super plasticizer, steel fibre and polypropylene fibre with very low water cement ratio under normal curing condition. RPC has been produce with high compressive strength ranging from upto 800 MPa with high flexural strength up to 50 MPa and in some cases provided with absences of steel reinforcement. Mix proportions of RPC were found by trial and error method, the concrete cubes of size 100mmx100mmx100mm were cast for find compressive strength of NRPC at 7days. Concrete cubes and cylinders of sizes 100mmx100mmx100mm and 100mmx150mm have to be cast for finding compressive strength and split tensile strength at 28 days. Flexural strength of NRPC and MRPC will be find out by casting prism of size 500mmx 100mmx 100 mm. The optimum mix proportion has to be finalized by comparing the results of all concrete specimens. Compressive strength test results shows that addition of silica fume upto 0.22% will increase the compressive strength of reactive powder concrete.

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Iya, Sani Garba Durumin, Mohamad Zaky Noh, Siti Noraiza Ab Razak, and Nur Azureen Alwi Kutty. "Physico-Mechanical Properties of Porcelain by Substitution of Quartz with POFA Treated with 2M Hcl Acid." International Journal of Engineering & Technology 7, no. 4.30 (November 30, 2018): 141. http://dx.doi.org/10.14419/ijet.v7i4.30.22081.

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Palm oil fuel ash (POFA) is a by-product from thermal power plant where palm kernel, shell and fibre used as fuel to generate electricity and disposed with no economic value. POFA is used as quartz replacement in the production of porcelain. POFA was dried in an oven for 24 hours at 110 °C, ground at a speed of 250 rev/sec for 12 hrs. Some of the POFA amount was treated with 2 Molar of HCl acid and some was kept untreated. Both treated and untreated were substituted with quartz at 15 wt% and mixed with porcelain composition and dry pressed into pellets at a mould pressure of 91 MPa and sintered at 1150 °C, 1200 °C and 1250 °C for 2 hrs soaking time respectively. XRF revealed that, POFA has similar chemical composition with quartz. The highest compressive strength, bulk density and Vickers microhardness being achieved at sintering temperature of 1150 °C using treated sample with the values 169 MPa, 2.432 g/cm3 and 774 HV respectively. HCl treated POFA is a good candidate for quartz replacement and 1150 °C was the best sintering temperature.

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B. NARENDRA, KUMAR, and RAMUJEE KOLLI. "STRESS-STRAIN BEHAVIOR OF M100 GRADE HIGH STRENGTH HYBRID FIBRE SELF COMPACTING CONCRETE USING QUARTZ MATERIALS." i-manager’s Journal on Structural Engineering 5, no. 1 (2016): 1. http://dx.doi.org/10.26634/jste.5.1.6051.

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Aksornmuang, Juthatip, Richard M. Foxton, Masatoshi Nakajima, and Junji Tagami. "Microtensile bond strength of a dual-cure resin core material to glass and quartz fibre posts." Journal of Dentistry 32, no. 6 (August 2004): 443–50. http://dx.doi.org/10.1016/j.jdent.2004.03.001.

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Orasche, J., J. Schnelle-Kreis, G. Abbaszade, and R. Zimmermann. "Technical Note: In-situ derivatization thermal desorption GC-TOFMS for direct analysis of particle-bound non-polar and polar organic species." Atmospheric Chemistry and Physics Discussions 11, no. 5 (May 19, 2011): 15255–95. http://dx.doi.org/10.5194/acpd-11-15255-2011.

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Abstract. An in-situ derivatization thermal desorption method followed by gas chromatography and time-of-flight mass spectrometry (IDTD-GC-TOFMS) was developed for determination of polar organic compounds. Hydroxyl and carboxyl groups of compounds such as anhydrous sugars, alcohols and phenols, fatty acids and resin acids are targets of the derivatization procedure. Derivatization is based on silylation with N-Methyl-N-trimethylsilyl-trifluoroacetamide (MSTFA) during the step of thermal desorption. The high temperature of 300 °C during desorption is utilized for the in-situ derivatization on the collection substrate (quartz fibre filters) accelerating the reaction rate. Thereby, the analysis time is as short as without derivatization. At first the filter surface is dampened with derivatization reagent before insertion of the sample into the thermal desorption unit. To ensure ongoing derivatization during thermal desorption the carrier gas is saturated with MSTFA until the desorption procedure is finished. The method introduced here was compared with direct thermal desorption gas chromatography time-of-flight-mass spectrometry (DTD-GC-TOFMS) and with solvent extraction (SE) procedures followed by gas chromatography and mass spectrometry. Comparisons were carried out with field samples originating from ambient aerosol collected on quartz fibre filters. Moreover, the methods have been applied on NIST Standard Reference Material Urban Dust (SRM 1649a).

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Ayan, A. S., N. Akchurin, U. Akgun, E. W. Anderson, Z. Bagoly, G. Y. Bencze, P. Bruecken, et al. "Energy resolution and the linearity of the CMS forward quartz fibre calorimeter pre-production-prototype (PPP-I)." Journal of Physics G: Nuclear and Particle Physics 30, no. 12 (October 28, 2004): N33—N44. http://dx.doi.org/10.1088/0954-3899/30/12/n01.

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Haupt, O., K. Linnow, R. Harmel, C. Schaefer, and W. Dannecker. "Qualitative X-Ray Fluorescence Analysis of Emitted Aerosol Particles from Incineration Plants Sampled on Quartz Fibre Filters." X-Ray Spectrometry 26, no. 2 (March 1997): 79–84. http://dx.doi.org/10.1002/(sici)1097-4539(199703)26:2<79::aid-xrs203>3.0.co;2-m.

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Fermo, Paola, Sara Goidanich, Valeria Comite, Lucia Toniolo, and Davide Gulotta. "Study and Characterization of Environmental Deposition on Marble and Surrogate Substrates at a Monumental Heritage Site." Geosciences 8, no. 9 (September 14, 2018): 349. http://dx.doi.org/10.3390/geosciences8090349.

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In this study, the results of the field exposure activity conducted between 2014 and 2017 on the façade of the Milano cathedral (Italy) are reported. The main research aim was to characterize environmental deposition in real exposure conditions and for this purpose, both stone substrates (Candoglia marble) and surrogate substrates (quartz fibre filters) were exposed on the cathedral façade in two sites at different heights. A complete chemical characterization has been performed on quartz filters and marble substrates, i.e., quantification of the deposited aerosol particulate matter (PM) and of the main ions. On quartz filters, the carbonaceous component of deposits was also investigated, as well as the color change induced by soiling, by means of colorimetric measurements. The combined approach exploiting marble and surrogate substrates seems to be a suitable monitoring strategy, although some aspects should be taken into account. In particular, differences in the deposits composition have been highlighted mainly depending on the type of substrate. The environmental data related to atmospheric pollution in Milan for the same period have also been considered but no direct correlations were found between some atmospheric precursors and their related ions in solid deposits.

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