Showing 241 - 260 results of 327 for search '"quartz"', query time: 0.04s Refine Results
  1. 241

    QCM Analysis for Two-Step Adsorption of Albumin and Fibronectin on Zirconia Surface by Masatsugu Hirota, Tohru Hayakawa

    Published 2021-01-01
    “…In this study, we investigated the two-step adsorption of fibronectin (Fn) and bovine serum albumin (Alb) on the ZrO2 surface using a 27-MHz quartz crystal microbalance (QCM) method. A ZrO2 sensor was employed for the QCM measurements. …”
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  2. 242

    Road properties of cement-phosphogypsum-red clay under dry and wet cycles. by Yunke Liu, Kaisheng Chen, Hao Jian, Zeyu Liu

    Published 2024-01-01
    “…SCA-2 water stabilizer reduces the strength of the mixture, but significantly improve the water stability performance of the mixture, the reason SCA-2 water stabilizer active ingredients and mixing particles of physicochemical reaction, the content of ettringite in the mixture is lower than the content of the mixture not mixed with water stabilizers, the generation of quartz, white mica, and kaolinite and other hydrophilic poor material increases, the surface of the cementitious material increases, the seepage channel is reduced, so the strength is reduced, and water stability performance is improved. …”
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  3. 243

    Issues with the Organic and Elemental Carbon Fractions in Recent U.S. Chemical Speciation Network Data by Philip K. Hopke, Yunle Chen, David Q. Rich, John G. Watson, Judith C. Chow

    Published 2023-05-01
    “…Abstract The carbon fractions of organic (OC1, OC2, OC3, OC4, OP) and elemental (EC1, EC2, and EC3) carbon obtained from IMPROVE (Interagency Monitoring of PROtected Visual Environments) thermal/optical carbon analysis of quartz-fiber filters have been implemented to help distinguish spark-ignition engine exhaust particulate matter (PM) contributions from those of heavy-duty diesel exhaust. …”
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  4. 244

    THORIUM, URANIUM AND RARE EARTH MINERALIZATION IN ROCKS OF THE UGAKHAN GOLD DEPOSIT, BODAIBO ORE REGION by E.V. Shepel, N.R. Ayupova, M.A. Rassomakhin, P.V. Khvorov

    Published 2021-09-01
    “…The rocks consist of quartz, feldspar (albite, orthoclase), Fe-Mg chlorite, mica (muscovite, sericite) and carbonates (calcite, dolomite, ankerite) and accessory titanite, rutile, tourmaline, zircon and apatite. …”
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  5. 245

    Structure and formation of the Lower Cretaceous–Eocene section in the central part of the Simferopol Uplift by K.A. Dubkova, S.B. Shishlov, E.M. Bugrova, E.Yu. Zakrevskaya

    Published 2022-06-01
    “…The Upper Ypresian lower part is formed by the transgressive lag of glauconite-quartz sandstones accumulated near the coast. Sandy marls with boulders of nummulitic limestones lie above, they must have formed in highly dynamic shallow marine conditions. …”
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  6. 246

    Mineralogical and geochemical peculiarities and gold content of pyrite and arsenopyrite of the Southern Ashaly gold deposit (East Kazakhstan) by Greku E. D., Kalinin Yu. A., Serdyukov A. N., Naumov E. A., Borovikov A. A., Ragozin A. L., Gladkov A. S.

    Published 2024-12-01
    “…The article provides a brief geological description of the Southern Ashaly mineral deposit within which ores of the gold-sulfide and gold-low-sulfide-quartz types were recognized. Two ore mineralization phases were established, that incorporate four stages, the pyrite, pyrite-arsenopyrite, sulfide, and polymetallic ones. …”
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  7. 247

    Petrology of Oligocene Lalehzar igneous rocks in the southeast of Saveh-Naein-Jiroft magmatic belt by Fatemeh Sepidbar, Bahareh Borouzi Niyat

    Published 2024-12-01
    “…The granodiorites and granite include quartz, plagioclase, alkali feldspar, biotite and amphibole with different percentages. …”
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  8. 248

    Comparison of Airborne Bacterial Populations Determined by Passive and Active Air Sampling at puy de Dôme, France by Kevin P. Dillon, Romie Tignat-Perrier, Muriel Joly, Sydonia N. C. M. Grogan, Catherine Larose, Pierre Amato, Gediminas Mainelis

    Published 2023-01-01
    “…., France) alongside an active PM10 sampler (~1000 L min−1) collecting aerosols on a quartz fiber filter. The diversity of the airborne bacteria captured by both samplers across six weekly sampling periods was examined by 16S rRNA gene amplicon sequencing. …”
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  9. 249

    RESERVOIR CHARACTERIZATION OF THE CHELA FORMATION OF THE NSIAMFUMU AND LIAWENDA FIELDS IN THE ONSHORE COASTAL BASIN, D.R. CONGO by Kalunga Sina-Nduku Tryphene, Deko Oyema Bruno, Link Bukasa Muamba, Pierre Paty Tshibumbu Kayeya, Emmanuel Kazinguvu Atibu, Dominique Wetshondo Osomba

    Published 2024-07-01
    “…The following observations were obtained: • Wells Lw-1: the formation is characterized by dolomitic limestone and micaceous black shale with a thickness of 34 m having heavy oil indices and an average porosity of 17% and a salinity greater than 300 gr/L; • Well Lw-2: the formation is characterized by islands of sand, coarse sandstone and a few quartz pebbles with a thickness of 10m showing evidence of light oil, gas and an average porosity of 24%; • Shaft Lw-3: the formation is dominated by micaceous shale and dolomite interbeds with a thickness of 14m showing little evidence of hydrocarbons, only salt water and residual oils; • Puits Ns-1: the formation is characterized by beige to grey dolomite, grey shale and white sand with a thickness of 6m showing evidence of light oil and an average porosity of 20%. …”
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  10. 250

    Investigation on Foaming Ability of Modified Polyethylene Terephthalate (PET) Composites Prepared Using Compression Molding by Hua-yong Liao, Jing Gao, Guo-liang Tao, Chun-lin Liu

    Published 2024-01-01
    “…PET was combined with polyolefin elastomer (POE) and filled with surface-treated mica, quartz, and graphene oxide (GO). POE served as a carrier and modifier for the foaming agent, as well as a toughening agent. …”
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  11. 251

    Characterization and enhanced performance of Ivorian clays as potential modifiers in carbon paste electrodes by Legré Paul Gauly, Mariame Coulibaly, Ségnéninhinténin Bakary Soro, Koffi Siméon Kouadio, Seiny Roger N’Dri, Ali Sanou, Albert Trokourey

    Published 2025-02-01
    “…Our analyses revealed that these clays are primarily composed of kaolinite, quartz, illite, and goethite. In addition, to enhance the properties of the clay, sodium ions were successfully incorporated into clays, resulting in higher sodium content and an increased specific surface area. …”
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  12. 252

    Fabrication of composite ceramic polymeric membranes for agricultural wastewater treatment by Neamatalla M. Azzam, Sahar S. Ali, Gehad G. Mohamed, Mohamed M. Omar, Shereen K. Amin

    Published 2025-01-01
    “…A ceramic supporting (CS) filter constructed from ball clay, kaolin, feldspar, and quartz using corn starch flour as a pore-developing agent. …”
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  13. 253

    MINERALOGICAL FEATURES AND PHYSICOCHEMICAL FORMATION CONDITIONS OF VEIN MINERALIZATION OF THE SOUTHERN FLANK OF THE SAF´YANOVKA MASSIVE SULFIDE DEPOSIT (CENTRAL URALS) by N.P. Safina, A.V. Korovko, I.A. Blinov, N.N. Ankusheva, M.A. Rassomakhin, K.A. Filippova

    Published 2024-12-01
    “…The sulfide veins include sphalerite-galena and sphaleritepyrite-chalcopyrite types, in which sulfides are associated with gypsum, carbonates, barite or quartz. Fluorite in host rocks is closely related to carbonates (dolomite, calcite, and siderite), kaolinite and magnesiocarpholite. …”
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  14. 254
  15. 255

    Brittleness evaluation of main coal seams in Permian Taiyuan-Shanxi formations, Baode block, Ordos Basin: based on a convolutional neural network method by Qingfeng ZHANG, Ziling LI, Jikun ZHANG, Shuai HAO, Xiaoguang SUN, Yanjie SHANG, Yun ZUO

    Published 2025-01-01
    “…Differences in mineral composition affected rock brittleness. Higher quartz content was linearly correlated with greater elastic modulus and brittleness index.…”
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  16. 256

    Analysis of geological characteristics and potential factors of formation damage in coalbed methane reservoir in Northern Qinshui basin by Hongjian Wu, Xiangwei Kong

    Published 2025-01-01
    “…The findings indicate that the mineral composition of the coal rock consists of 18.52% clay minerals, 34% quartz, and 8.98% calcite. Furthermore, hydrophilicity and natural fractures within the coal rock may lead to water-sensitivity, velocity- sensitivity, alkali- sensitivity, and acid- sensitivity damages to the coalbed methane reservoir. …”
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  17. 257

    Effect of degassing on scaling in hypersaline system: Tuzla geothermal field, Turkey by Serhat Tonkul, Laurent André, Alper Baba, Mustafa M. Demir, Simona Regenspurg, Katrin Kieling

    Published 2025-01-01
    “…If a small quantity of precipitated minerals is predicted before the boiling point, degassing significantly changes the fluid chemistry, and the model predicts the deposition of calcite along with smaller elements including galena, barite, and quartz. The simulation results are consistent with the mineral composition of scaling collected in the well.…”
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  18. 258

    Using anthropogenic raw materials in the process of synthesizing foam glass with heterogeneous microstructure by S. V. Fedosov, M. O. Bakanov, I. S. Grushko

    Published 2024-02-01
    “…The research revealed the formation of crystalline phases in the amorphous foam glass framework. The presence of quartz, pyroxene, cristobalite, eskolaite, and wollastonite in foam glass composition was confirmed.Conclusions. …”
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  19. 259

    Barium Sulfate Scale Removal at Low-Temperature by Hany Gamal, Saad Al-Afnan, Salaheldin Elkatatny, Mohamed Bahgat

    Published 2021-01-01
    “…The compositional analysis for scale samples showed that sample 1 is 100% barium sulfate where sample 2 has 97.75% barium sulfate and 2.25% of quartz. The composition of the developed dissolver has diethylenetriamine pentaacetic acid (DTPA) as a chelating agent, oxalic acid, and tannic acids as an activator, nonionic surfactant, and water as the base fluid. …”
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  20. 260

    Glazed Pottery Throughout the Middle and Modern Ages in Northern Spain by Ainhoa Alonso-Olazabal, Juan Antonio Quirós Castillo, Maria Cruz Zuluaga, Luis Ángel Ortega

    Published 2025-01-01
    “…The white glazes were opacified by the addition of cassiterite and sometimes quartz and feldspar. The glazed pottery was mainly of local origin, but the identification of some non-local pottery at all sites suggests a pottery trade.…”
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