Showing 221 - 240 results of 273 for search '"quartz"', query time: 0.05s Refine Results
  1. 221

    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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    Article
  2. 222

    Photonics-based modular multistate digital coherent system by I. V. Unchenko, A. A. Emelyanov

    Published 2022-07-01
    “…Calculations of the introduced phase error of a quartz singlemode fiber and graphs of the dependence of the change in the signal phase on external influencing factors are given. …”
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  3. 223

    Influence of Organic Matter Content on Engineering Properties of Clays by Yue Gui, Qiumin Zhang, Xiaqiang Qin, Jianfei Wang

    Published 2021-01-01
    “…In order to clarify the influence of organic matter content on clay soil, the illite-quartz mixture was mixed with natural amorphous peat soil (organic matter content is 50%) in different proportions for studying the influence of different organic matter contents on the physical properties (specific gravity, Gs; moisture content, w; void ratio, e; liquid limit, wL; plastic limit, wp; plasticity index, Ip) and shear characteristics (cohesion, c; friction angle, φ) of clay soil. …”
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  4. 224

    Research on Deterministic Ring Removal Method for Full-Aperture Double-Sided Polishing of Large Aperture Optical Components by Yifan Bai, Bo Xiao, Chunyang Wang, Ke Chen, Linzhe Deng, Siling Huang, Xuelian Liu

    Published 2025-01-01
    “…The developed process parameter decision assistance system was used to make process parameter decisions for two 430 * 430 mm fused quartz components, achieving the removal of the target ring of the components. …”
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    Article
  5. 225

    Layer-by-Layer Fabrication of PAH/PAMAM/Nano-CaCO3 Composite Films and Characterization for Enhanced Biocompatibility by Naemi Tonateni Shifeta, Shindume Lomboleni Hamukwaya, Qi An, Huiying Hao, Melvin Mununuri Mashingaidze

    Published 2022-01-01
    “…This study investigated the characteristics of polymeric/nano-CaCO3 composite films based on a PAH/PAMAM matrix, which were fabricated through layer-by-layer synthesis on quartz glass substrates. It was found that the as-prepared elastic moduli of the resultant (PAH/PAMAM)n-CaCO3 (where n represents the number of bilayers) composite films varied from 1.40 to 23.70 GPa for different degrees of cross-linking when 0.1 M nano-CaCO3 particles were incorporated into the polymer matrix. …”
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  6. 226

    Characterization of Colombian Clay and Its Potential Use as Adsorbent by Iván Fernando Macías-Quiroga, Gloria Inés Giraldo-Gómez, Nancy Rocío Sanabria-González

    Published 2018-01-01
    “…The XRD analysis showed that the clay from Armero-Guayabal is primarily constituted by smectite (48 wt%) followed by quartz mineral (21 wt%). The chemical analysis of bulk clay showed that the predominant oxides are SiO2 (55.81 wt%), Al2O3 (16.25 wt%), and Fe2O3 (7.51 wt%), and the nitrogen adsorption indicated that the bulk clay has a specific surface area of 45.1 m2/g. …”
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  7. 227
  8. 228

    Experimental Study on the Self-Healing Behavior of Fractured Rocks Induced by Water-CO2-Rock Interactions in the Shendong Coalfield by Jinfeng Ju, Quansheng Li, Jialin Xu

    Published 2020-01-01
    “…The sandrock specimens were rich in feldspars, which were dissolved and/or corroded and involved in ionic exchange reactions with CO2 and groundwater, thereby generating secondary minerals (such as kaolinite, quartz, and sericite) or CaSO4 sediments. These derivative matters adhered to the fracture surface, thereby gradually repairing fractures and decreasing the water permeability of the fractured rocks. …”
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  9. 229

    Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag by Zhaojing Song, Junqian Li, Xiaoyan Li, Ketong Chen, Chengyun Wang, Peng Li, Yongbo Wei, Rixin Zhao, Xiaocheng Wang, Shasha Zhang, Mengying Yan, Haiyan Geng

    Published 2022-01-01
    “…Based on the MS from Shahejie Formation mineral composition (clay mineral, felsic mineral, and calcareous mineral contents), total organic content, and bedding structure (laminated, laminar, and massive), six types of lithofacies were identified: clay-rich MS, felsic-rich MS, calcareous-rich MS, clay MS, felsic MS, and calcareous MS. The quartz, feldspar, calcite, and dolomite of the Shahejie Formation are brittle minerals. …”
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  10. 230

    Piezoelectric biosensor with dissipation monitoring enables the analysis of bacterial lytic agent activity by Radka Obořilová, Eliška Kučerová, Tibor Botka, Hana Vaisocherová-Lísalová, Petr Skládal, Zdeněk Farka

    Published 2025-01-01
    “…Here, we introduce a novel approach for real-time monitoring of pathogen lysis dynamics employing the piezoelectric quartz crystal microbalance (QCM) with dissipation (QCM-D) technique. …”
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  11. 231

    Pseudomonas aeruginosa Biofilm Removal from Two Kinds of Granite Commonly Found in Catering Kitchen by Khaddouj Amzil, Fatima Hamadi, Hassan Latrache, Rachida Mimouni, Hicham Abou Oualid, Khadija Azelmad, Aissa Saidi, Abdallah Elboulani, Mustapha Mabrouki

    Published 2020-01-01
    “…The results revealed that Gris Pinhel is hydrophilic with a high roughness value and Rosa Porrino is hydrophobic with low roughness, while both of them contain the quartz, feldspar, and mica as the main dominant compositions.…”
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  12. 232

    Numerical Test Study of the Microscale Failure Modes and Fractal Analysis of Lower Cambrian Shale Based on Digital Images by Hengtao Cui, Zhonghu Wu, Liping Li, Jing Wang, Shuguang Song, Shangqu Sun, Yujun Zuo, Hao Liu, Yili Lou

    Published 2020-01-01
    “…To reveal the effect of confining pressure on the mechanical properties and rupture modes of quartz-bearing shale, the shale core of the no. 3 block of Fenggang, Guizhou Province, China, was analyzed by nuclear magnetic resonance, polarized light microscope thin section observation and identification, and core X-ray whole-rock minerals diffraction analysis to determine the distribution of shale minerals in the Niutitang Formation. …”
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    Article
  13. 233

    High-Stability and Fast Calibration-Free Temperature Measurement Based on Light-Induced Thermoelastic Spectroscopy by Xiaonan Liu, Shunda Qiao, Ying He, Yufei Ma

    Published 2025-01-01
    “…These techniques utilize the steady-state and transient response characteristics of the quartz tuning fork (QTF), namely, the calibration-free LITES (CF-LITES) and calibration-free heterodyne LITES (CF-H-LITES) methods. …”
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  14. 234

    Feldspar Dissolution and Its Influence on Reservoirs: A Case Study of the Lower Triassic Baikouquan Formation in the Northwest Margin of the Junggar Basin, China by Meng Xiao, Xuanjun Yuan, Dawei Cheng, Songtao Wu, Zhenglin Cao, Yong Tang, Zongrui Xie

    Published 2018-01-01
    “…The acidic fluids needed for feldspar dissolution are mostly derived from organic acids associated with the source rocks and migrate to the good-permeability area of the reservoir; (2) the by-products of feldspar dissolution, such as authigenic clay minerals and authigenic quartz, are transported by pore water in a relatively open diagenetic system and then precipitated in a relatively closed diagenetic system; and (3) the clay minerals produced by feldspar dissolution in different diagenetic environments and diagenetic stages have different effects on the reservoir. …”
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  15. 235

    Analysis of the Particle Characteristics of Aeolian Sand in Yulin Area, China by Qinglong You, Zhang Yang, Jinglian Ma, Xili Yan, Taiwo Sesay, Haifeng Wang, Zhou Liang

    Published 2022-01-01
    “…SEM observation revealed different profile configurations on the surfaces of the Aeolian sand particles including intensive pitting, corrosion marks, and cracks, while the XRD results indicated the presence of quartz and feldspar in more than 95% of the entire mineral composition of the sand particles. …”
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  16. 236

    Deformation Failure and Support Test of Surrounding Rock in Deep Arched Roadway with Straight Wall by Shuqi Pan, Shuaitao Liu, Liming Cao, Jianqiang Guo, Chao Yuan

    Published 2021-01-01
    “…The similar simulation material of the roadway surrounding rock with quartz sand as the aggregate, cement as the cementing agent, and gypsum powder as the regulator was selected. …”
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  17. 237

    Pore Fluid Evolution Influenced by Volcanic Activities and Related Diagenetic Processes in a Rift Basin: Evidence from the Paleogene Medium-Deep Reservoirs of Huanghekou Sag, Bohai... by Zhongheng Sun, Hongtao Zhu, Changgui Xu, Xianghua Yang, Xiaofeng Du, Qingbin Wang, Jinyang Qiao

    Published 2017-01-01
    “…Alkaline aqueous medium environment occurred in E2s1+2 where volcanic activities have insignificant influence on pore fluids, evidenced by typical alkaline diagenetic events such as K-feldspar albitization, quartz dissolution, feldspar dissolution, and carbonate cementation. …”
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  18. 238

    Experimental Study on Nanomechanical Properties of Yunnan Red-Bed Mudstone by Xian Ye, Yongcai Liu, Haibin Xue, Guo Li, Jin Xing

    Published 2022-01-01
    “…Overall, the elastic modulus and the hardness of sample 2 (Jingdong) are the greatest because of its high quartz crystal content. It shows that the nanomechanical properties of red-bed mudstone in Jingdong are better than those in Chuxiong and Nanhua. …”
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  19. 239

    Hydrogeochemistry, Geothermometry, and Genesis of the Hot Springs in the Simao Basin in Southwestern China by Yuqi Zhang, Xun Zhou, Haisheng Liu, Mingxiao Yu, Kuo Hai, Mengru Tan, Dongxue Huo

    Published 2019-01-01
    “…Due to the effect of mixing, the reservoir temperatures (51°C-127°C) calculated with the quartz geothermometer are regarded as the minimum reservoir temperatures. …”
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  20. 240

    Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions by Wei Li, Jiong Wu, Jie Yan, Xinran Liang, Xiaoyi Li, Yongmei He, Bo Li, Fangdong Zhan

    Published 2025-01-01
    “…The adsorption of Cd ions by quartz sand increased with the application of GRSP and LMWOAs, which resulted in a 27.6 %–69.5 % reduction in Cd leaching loss in the sand column. …”
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