Showing 881 - 900 results of 929 for search '"clay"', query time: 0.07s Refine Results
  1. 881

    Influence of quartz types on mechanical parameters in the early silurian Longmaxi shale, Sichuan Basin by Qin Zhang, Feng Liang, Qun Zhao, Wen Liu, Weiliang Kong, Wanli Gao, Xinyu Zhang, Guangyin Cai, Tianquan Qu, Zhen Qiu

    Published 2024-12-01
    “…Abstract Quartz is one of the most abundant minerals in shales, occurring predominantly in three forms: biogenic quartz (BQ), detrital quartz (DQ) and clay-transformed quartz (CTQ). The content of quartz is typically correlated with the fracability of shale gas reservoirs. …”
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  2. 882

    Analyse des terres cuites architecturales de l’aqueduc de Nyon/Colonia Iulia Equestris (Suisse) by Benjamin Clément, Christophe Henny, Anne Schmitt

    Published 2023-12-01
    “…Two types of materials were used for paving the bottom of the specus: Lydian module bricks (1.5 ft × 1 ft square), on the one hand, and bipedal bricks (2 ft square) on the other.Through the physico-chemical analyses conducted on the clays of these architectural terracottas, we were better able to determine the origin of the materials. …”
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  3. 883

    Dynamic changes in soil erosion and challenges to grain productivity in the black soil region of Northeast China by Jiawang Zhang, Ming Wang, Kai Liu, Zhan’ao Zhao

    Published 2025-02-01
    “…Wind erosion was relatively stable throughout the year, with two-factor enhancement factor of 0.76 attributed to soil organic matter and clay content. The expansion of cities over the last 30 years has resulted in the encroachment of 7,936 km2 of cropland. …”
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  4. 884

    Building a near-infrared (NIR) soil spectral dataset and predictive machine learning models using a handheld NIR spectrophotometerZenodo by Colleen Partida, Jose Lucas Safanelli, Sadia Mannan Mitu, Mohammad Omar Faruk Murad, Yufeng Ge, Richard Ferguson, Keith Shepherd, Jonathan Sanderman

    Published 2025-02-01
    “…Machine learning predictive models were developed for soil organic carbon (SOC), pH, bulk density (BD), carbonate (CaCO3), exchangeable potassium (Ex. K), sand, silt, and clay content from their spectra in the R programming language using most of this dataset (1,976 US soils) and are included in this data release. …”
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  5. 885

    Les siphons en terre cuite du monde romain : l’exemple de l’aqueduc d’Almuñécar (Andalousie, Espagne) by Elena H. Sánchez López

    Published 2023-12-01
    “…The analysis result shows that there is not a major difference in the dimensions of the pipes used with either function, which seems to indicate that the clay pipes used in the siphons were not made with any special characteristics.The text finally discusses the possible reasons behind the choice of terracotta over other materials in manufacturing siphon pipes.The analysis of Roman siphons, and more generally Roman aqueducts, produces different explanations. …”
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  6. 886

    Soil microbial community and influencing factors of different vegetation restoration types in a typical agricultural pastoral ecotone by Pei Huang, Pei Huang, Pei Huang, Hanyu Shi, Hanyu Shi, Lina Jiang, Duoping Zhu, Duoping Zhu, Zefeng Zhou, Zhenhong Hou, Xingyu Ma, Xingyu Ma

    Published 2025-01-01
    “…Bacterial community composition was found to be closely related to soil organic carbon (SOC), total nitrogen (TN), while that of fungi was closely related to SOC, clay and silt content. This improvement in microbial complexity enhances the ecological service function of the agricultural pastoral ecotone. …”
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  7. 887

    Water conservation assessment and its influencing factors identification using the InVEST and random forest model in the northern piedmont of the Qinling Mountains by Song He, Hui Qian, Yuan Liu, Xiaoguang Zhao, Fengmei Su, Huan Ma, Zilong Guan, Tao Zhang

    Published 2025-02-01
    “…Conversely, evapotranspiration, agricultural land, and clay content in topsoil were found to negatively affect water conservation. …”
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  8. 888

    Mollusk Diversity in Percut Sei Tuan Silvofishery Ponds, North Sumatra, Indonesia by Ipanna Enggar Susetya, Mohammad Basyuni, Muhammad Rakezza Rifzy Rifzy, Rizka Amelia, Yuntha Bimantara, Rusdi Leidonald, Amanatul Fadhilah

    Published 2022-09-01
    “…The substrate in both ponds was clay. Nitrate concentration values "‹"‹in the substrate in both ponds ranged from 0.27% to 0.29%, phosphate recorded a percentage of 0.07–0.09%, and C-organic ranged from 3.00% to 5.72%. …”
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  9. 889

    Preharvest Factors Affecting Quality on “Abate Fetel” Pears: Study of Superficial Scald with Multivariate Statistical Approach by Alessandro Bonora, Enrico Muzzi, Cristiano Franceschini, Alexandra Boini, Gianmarco Bortolotti, Kushtrim Bresilla, Giulio Demetrio Perulli, Melissa Venturi, Luigi Manfrini, Luca Corelli Grappadelli

    Published 2021-01-01
    “…Some can increase its occurrences such as physiological and agronomical factors: high yields, late date of blooming, heavy downpours, improper irrigation management (low watering frequency and high volumes), nitrogen (included that deriving from organic matter), soil texture (presence of clay), orchard age, and canopy volume in relation to training system and rootstock. …”
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  10. 890

    Soil-plant-animal relationships and their effect on pasture-based milk production in Hacienda Cuba, Colombia by María A. López G., Ana G. Quintero M., Juan J. Zúñiga E., Felipe Vélez S., Juan F. Naranjo R., Óscar A. Sáenz R., Andrés F. Pérez R.

    Published 2023-11-01
    “…Our findings revealed that soil composition was 10% sand, 46% silt, and 44% clay, pH of 5.0, CEC of 15.16, and P of 11. Microbiological analyses indicated that most functional groups were within acceptable ranges. …”
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  11. 891

    Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block by Xinyang He, Kun Zhang, Shu Jiang, Zhenxue Jiang, Xueying Wang, Wei Jiang, Jing Li, Yijia Wu, Zhi Gao, Tian Tang, Cheng Yang, Xuejiao Yuan, Fengli Han, Zeyun Wang, Laiting Ye

    Published 2025-01-01
    “…Conclusions below have been reached: the content of adsorbed gas is mainly affected by Ro, TOC content, porosity, water saturation, clay mineral content, formation temperature and pressure; the content of free gas is mainly controlled by porosity, water saturation, formation temperature and pressure; according to the prediction models, the adsorbed gas content, free gas content and total gas content of each well were quantitatively calculated, and the study area was divided into Class I (with a total gas content ≥ 11 m3/t), Class II (with a total gas content between 9 m3/t and 11 m3/t), and Class III (with a total gas content < 9 m3/t) gas-bearing areas.…”
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  12. 892

    Les broyeurs en pierre en forme de doigt dans le sud-est de la Gaule romaine by Yves Manniez, Vincent Lauras

    Published 2021-12-01
    “…Ultimately, this study allowed us to evoke the ancient origin of finger-shaped stone pestles, as well as to discover that this form was inspired by clay objects already attested to in Mesopotamia in the 6th and 5th millennia BC. …”
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  13. 893

    Differential responses of soil C, N, and P ecological stoichiometric characteristics to different configurations of edge-locked forests in the Kubuqi Desert by Xue Chen, Hejun Zuo, Hejun Zuo, Min Yan, Min Yan, Haibing Wang, Haibing Wang, Cheng Xi, Yinchao Chai

    Published 2025-01-01
    “…Both soil SOC and TN content decreased with increasing soil depth, whereas soil TP content displayed no considerable variation among different stand types or soil depths. (2) Based on the N/P threshold hypothesis, N was the limiting nutrient element for the growth of edge-locked forests in the region. (3) The understory soils of different configurations of edge-locked forests mainly comprised sand. The silt and clay contents of SL and NT + XYY were substantially higher than those of the other four configurations. …”
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  14. 894

    Land subsidence and rebound response to groundwater recovery in the Beijing Plain: A new hydrological perspective by Dexin Meng, Beibei Chen, Huili Gong, Shubo Zhang, Rui Ma, Chaofan Zhou, Kunchao Lei, Lewei Xu, Xincheng Wang

    Published 2025-02-01
    “…A longer delay between GWL recovery and surface rebound was observed in the aquifer with thicker clay layers, with over 77 % of the compaction being irreversible.…”
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  15. 895

    Harbor water pollution by heavy metal concentrations in sediments by L. Sulistyowati, Y. Yolanda, N. Andareswari

    Published 2023-10-01
    “…The sediment fraction is 72.2 percent sandy, 16.4 percent sludge, and 11.4 percent clay substrate.CONCLUSION: Pollution in the waters of the Belawan Harbor is in the category of not polluted to slightly polluted. …”
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  16. 896

    Uranium Mineral Transport in the Peña Blanca Desert: Dissolution or Fragmentation? Simulation in Sediment Column Systems by Victoria Pérez-Reyes, Rocio M. Cabral-Lares, Jesús G. Canche-Tello, Marusia Rentería-Villalobos, Guillermo González-Sánchez, Blanca P. Carmona-Lara, Cristina Hernández-Herrera, Fabián Faudoa-Gómez, Yair Rodríguez-Guerra, Gregorio Vázquez-Olvera, Jorge Carrillo-Flores, Ignacio A. Reyes-Cortés, Daniel Hernández-Cruz, René Loredo-Portales, María E. Montero-Cabrera

    Published 2025-01-01
    “…This study presents an experimental simulation of uranium transport in SPB sediments using three approaches: (i) a batch experiment to evaluate the ideal adsorption of (UO<sub>2</sub>)<sup>2+</sup> by fine sediment; (ii) a column system fed with 569 mgU L<sup>−1</sup> UO<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub> to simulate adsorption by different sediment particle sizes; (iii) a column system with an upper horizon of uranophane from the area, fed with deionized water, to simulate uranium weathering and transport in particulate material, determined by liquid scintillation counting, revealed that the clay fraction had the highest adsorption capacity for U. …”
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  17. 897

    A suitability modeling based on geographic information system for potential micro hydropower dam site by O. Setiawan, H.Y.S.H. Nugroho, N. Wahyuningrum, D. Auliyani, K.S. Hardjo

    Published 2024-01-01
    “…These classes were typified by high drainage density, topographic wetness index, stream power index, low vegetation cover, moderate slope, situated on second or higher stream orders, normal temporal distribution of rainfall, and sandy clay loam soil texture with igneous and sedimentary complex rocks. …”
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  18. 898
  19. 899

    Les réseaux d’alimentation en eau des pentes de la Croix-Rousse et de la presqu’île de Lyon by Jules Ramona

    Published 2023-12-01
    “…Similarly, the two long clay pipes recently uncovered on the Hôtel-Dieu and Saint-Antoine parking sites are probably linked with an outdoor space. …”
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  20. 900

    Microplastic analysis in soils: A comparative assessment by Stoyana Peneva, Quynh Nhu Phan Le, Davi R. Munhoz, Olivia Wrigley, Flora Wille, Heidi Doose, Crispin Halsall, Paula Harkes, Michael Sander, Melanie Braun, Wulf Amelung

    Published 2025-01-01
    “…Pyrolysis-GC-MS showed intermediate results, displaying low sensitivity to plastic type and lower recoveries as soil clay content increased. We conclude that different methods have different sensitivities for different MiP materials in different soils, i.e. comparisons of MiP loads and threshold settings for MiP loads across methodologies require careful consideration. …”
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