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Статті в журналах з теми "Mineral loading"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Zhang, Jianyong, Zhendong Cui, Weige Han, Kai Si, and Yan Zhao. "Comparative Study on Mineral-Scale Microcrack Propagation of Shale under Different Loading Methods." Advances in Civil Engineering 2021 (January 28, 2021): 1–18. http://dx.doi.org/10.1155/2021/6621347.

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Producing a sufficient volume of multiscale crack networks is key to enhancing recovery of shale gas. The formation of crack network largely depends on initiation and propagation of microcracks. To reveal the influence of different loading methods on the propagation of mineral-scale microcracks, this study used the Voronoi tessellation technique to establish a cohesive zone model of shale mineral distribution and applied six different boundary conditions to represent different loading methods. Crack path characteristics, rupture characteristics, continuous crack propagation and turning, and en

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2

Kumar, Pradeep, Yuvraj Singh Negi, and Surendra Pal Singh. "Filler loading in the lumen or/and cell wall of fibers – A literature review." BioResources 6, no. 3 (2011): 3526–46. http://dx.doi.org/10.15376/biores.6.3.3526-3546.

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A review of the literature reveals potential advantages that papermakers can achieve by placing minerals in the lumens or cell walls of fibers before the pulp is formed into paper. Loading of filler into the fiber lumen by mechanical deposition or within the cell wall by in-situ precipitation has been reported to generally result in a moderate reduction in light scattering coefficient and increased strength properties of laboratory handsheets, as well as in paper manufactured with pilot plant equipment, when compared to conventional addition of filler. However, there are some exceptions to thi

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3

Schweizer, Steffen A., Carsten W. Mueller, Carmen Höschen, Pavel Ivanov, and Ingrid Kögel-Knabner. "The role of clay content and mineral surface area for soil organic carbon storage in an arable toposequence." Biogeochemistry 156, no. 3 (2021): 401–20. http://dx.doi.org/10.1007/s10533-021-00850-3.

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AbstractCorrelations between organic carbon (OC) and fine mineral particles corroborate the important role of the abundance of soil minerals with reactive surfaces to bind and increase the persistence of organic matter (OM). The storage of OM broadly consists of particulate and mineral-associated forms. Correlative studies on the impact of fine mineral soil particles on OM storage mostly combined data from differing sites potentially confounded by other environmental factors. Here, we analyzed OM storage in a soil clay content gradient of 5–37% with similar farm management and mineral composit

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4

Abu Fara, Ammar, Mark R. Rayson, Geoff F. Brent, Timothy K. Oliver, Michael Stockenhuber, and Eric M. Kennedy. "Direct Aqueous Carbonation of Heat-Activated Lizardite; Effect of Particle Size and Solids Loading on Magnesite Yield." Minerals 15, no. 2 (2025): 155. https://doi.org/10.3390/min15020155.

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In this study, we investigated the effect of particle size and solids loading on the magnesite yield in the direct aqueous mineral carbonation of heat-activated lizardite. Experimentation was conducted under single-step reaction conditions (130 bar partial pressure of carbon dioxide (CO2) and 150 °C, with 0.64 M sodium bicarbonate (NaHCO3) and 15 wt% solids) as developed by the Albany Research Center (ARC). The objective of the study was to enhance the understanding of the direct aqueous mineral carbonation process in heat-activated lizardite. Furthermore, we aimed to shed light on how variati

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5

Cullen, D. M., R. T. Smith, and M. P. Akhter. "Time course for bone formation with long-term external mechanical loading." Journal of Applied Physiology 88, no. 6 (2000): 1943–48. http://dx.doi.org/10.1152/jappl.2000.88.6.1943.

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Increased mechanical loading of bone with the rat tibia four-point bending device stimulates bone formation on periosteal and endocortical surfaces. With long-term loading cell activity diminishes, and it has been reported that early gains in bone size may reverse. This study examined the time course for bone cellular and structural response after 6, 12, and 18 wk of loading at 1,200–1,700 microstrain (με). Bone formation rates, measured by histomorphometry, were compared within groups, between loaded and contralateral nonloaded tibiae, and between weeks. Formation surface, mineral apposition

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6

Sanwlani, Nivedita, and Reshmi Das. "Understanding Haze: Modeling Size-Resolved Mineral Aerosol from Satellite Remote Sensing." Remote Sensing 14, no. 3 (2022): 761. http://dx.doi.org/10.3390/rs14030761.

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Mineral dust aerosols are composed of a complex mixture of silicates, carbonates, oxides, and sulfates. The minerals’ chemical composition and size distribution are vital parameters to evaluate dust environmental impacts. However, the quantification of minerals remains a challenge due to the sparse in situ measurements of dust samples. Here we derive the size-resolved mineralogical composition of airborne dust aerosols from MODIS (Terra and Aqua) satellite-acquired optical measurements and compare it with chemically analyzed elemental (Al, Fe, Ca, Mg) concentrations of aerosols for PM2.5 and P

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7

Leppänen, Olli V., Harri Sievänen, Jarkko Jokihaara, et al. "The effects of loading and estrogen on rat bone growth." Journal of Applied Physiology 108, no. 6 (2010): 1737–44. http://dx.doi.org/10.1152/japplphysiol.00989.2009.

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This study evaluated the contributions of locomotive loading and estrogen to the development of diaphysis of rat femur. A randomized 2 × 2 study design was used. Altogether, 70 female Sprague-Dawley rats were used, of which 10 were euthanized at entry. Of the remaining rats, 16 served as controls, and the rest, 44, underwent a unilateral sciatic neurectomy. The effect of estrogen was removed by ovariectomizing one-half of the neurectomized rats. After 27 wk, the animals were euthanized, and the femora were excised. Irrespective of loading or estrogen, the femur length and mineral mass increase

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8

Scerpella, Tamara A., Jodi N. Dowthwaite, Nicole M. Gero, Jill A. Kanaley, and Robert J. Ploutz-Snyder. "Skeletal Benefits of Pre-Menarcheal Gymnastics Are Retained After Activity Cessation." Pediatric Exercise Science 22, no. 1 (2010): 21–33. http://dx.doi.org/10.1123/pes.22.1.21.

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Mechanical loading during childhood and adolescence may yield skeletal benefits that persist beyond activity cessation and menarche. At 1 year pre- and 2 years post-menarche, nondominant forearm areal bone mineral density (aBMD), bone mineral content (BMC) and projected area (area) were compared in gymnasts (n = 9), ex-gymnasts (n = 8) and nongymnasts (n = 13). At both observations, gymnasts and ex-gymnasts had higher forearm aBMD, BMC and area than nongymnasts. gymnasts had higher postmenarcheal means than ex-gymnasts for all three parameters. Childhood mechanical loading yields skeletal adva

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9

Duan, Dong, Xiaoyu Chen, Xiaojing Feng, Xin Wang, and Jiang Sun. "Study on Failure Mechanism of Mudstone Based on Digital Core and Digital Volume Correlation Method." Applied Sciences 12, no. 15 (2022): 7933. http://dx.doi.org/10.3390/app12157933.

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In order to study the damage evolution law and failure mechanism of mudstone under different stress states, with the help of high-resolution CT scanning equipment, in situ CT scanning experiments of mudstone under uniaxial compression were carried out. Combined with digital core technology and the digital volume image correlation method, the 3D characterization of meso-structure and the evolution process of localized damage in mudstone were analyzed. The research shows that brittle minerals such as quartz in mudstone often exist in the form of agglomerated strips, resulting in the formation of

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10

Fu, Yu, and Zhongliang Feng. "Simulation of the Effect of Coal Microstructures on the Macroscopic Mechanical Behavior." Advances in Civil Engineering 2020 (November 26, 2020): 1–14. http://dx.doi.org/10.1155/2020/1025952.

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This paper investigates the influence of mineral structure on macromechanical behavior of coal under different loading conditions using X-ray CT scanning experimental and numerical methods. The three-dimensional (3D) reconstruction of coal was conducted to assess the spatial distribution characteristics of the mineral structure by AVIZO software. Based on fractal box dimension (BCD) and equivalent diameter, the mineral structures were quantitatively characterized. The 3D finite element models with three distribution characteristics of minerals were built, and the model was considered as a rand

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11

Qi, Yaozhong, Sikai Zhao, Yanbai Shen, et al. "A Critical Review of Clay Mineral-Based Photocatalysts for Wastewater Treatment." Catalysts 14, no. 9 (2024): 575. http://dx.doi.org/10.3390/catal14090575.

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This review critically examines the latest advancements in clay mineral-based photocatalysts for water purification. Clay minerals, owing to their natural abundance, low cost, and unique physicochemical properties, have emerged as promising candidates for enhancing photocatalytic efficiency. This article delves into various activation methods for clay minerals, including acid, alkali, calcination, and mechanochemical activation, highlighting their roles in enhancing surface area, creating active sites, and improving photocatalytic performance. Moreover, the review explores various modification

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12

Cao, Ansheng, and Jianxiu Wang. "Study on the characteristics of granite rock impact crack based on grain-based model." IOP Conference Series: Earth and Environmental Science 1331, no. 1 (2024): 012019. http://dx.doi.org/10.1088/1755-1315/1331/1/012019.

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Abstract The type and heterogeneity of minerals control the initiation, aggregation, and expansion of rock blasting cracks and significantly affect the rock failure process. Granite was used to investigate the law of rock cracking under impact loading at the scale of mineral particles, and a two-dimensional grain-based model (GBM) was developed using PFC based on CT) scanning and laboratory mechanical tests. The GBM’s reliability was validated using laboratory uniaxial compression tests and numerical simulations. The specimen failure modes and evolution of microcracks during rock impact were a

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13

Uddin, Faheem. "Studies in Finishing Effects of Clay Mineral in Polymers and Synthetic Fibers." Advances in Materials Science and Engineering 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/243515.

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The use of clay mineral in modifying the properties of polymeric material is improved in application. The current interest in modifying the polymeric materials, particularly polyethylene, polypropylene, polystyrene, and nylon using clay mineral for improved flame retardancy, thermal stability, peak heat release rate, fracture, and strength properties generated significant research literature. This paper aims to review some of the important recent modification achieved in the performance of polymeric materials using organoclay mineral. Degradation of clay mineral-polymer (nm) composite is discu

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14

Ducher, Gaële, Christelle Jaffré, Alexandre Arlettaz, Claude-Laurent Benhamou, and Daniel Courteix. "Effects of Long-Term Tennis Playing on the Muscle-Bone Relationship in the Dominant and Nondominant Forearms." Canadian Journal of Applied Physiology 30, no. 1 (2005): 3–17. http://dx.doi.org/10.1139/h05-101.

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The relationship between muscle strength and bone mineral density illustrates the positive effect of mechanical loading on bone. But local and systemic factors may affect both muscle and bone tissues. This study investigated the effects of long-term tennis playing on the relationship between lean tissue mass and bone mineral content in the forearms, taking the body dimensions into account. Fifty-two tennis players (age 24.2 ± 5.8 yrs, 16.2 ± 6.1 yrs of practice) were recruited. Lean tissue mass (LTM), bone area, bone mineral content (BMC), and bone mineral density were measured at the forearms

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15

Guo, Jun, Guo-rui Feng, Ting-ye Qi, et al. "Dynamic Mechanical Behavior of Dry and Water Saturated Igneous Rock with Acoustic Emission Monitoring." Shock and Vibration 2018 (2018): 1–14. http://dx.doi.org/10.1155/2018/2348394.

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The uniaxial cyclic loading tests have been conducted to study the mechanical behavior of dry and water saturated igneous rock with acoustic emission (AE) monitoring. The igneous rock samples are dried, naturally immersed, and boiled to get specimens with different water contents for the testing. The mineral compositions and the microstructures of the dry and water saturated igneous rock are also presented. The dry specimens present higher strength, fewer strains, and rapid increase of AE count subjected to the cyclic loading, which reflects the hard and brittle behavior and strong burst prone

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16

Shemyakin, A. V., S. N. Borychev, I. A. Uspenskiy, K. P. Andreev, and V. V. Terentyev. "Improvement of the technological process of surface application of mineral fertilizers." BIO Web of Conferences 17 (2020): 00192. http://dx.doi.org/10.1051/bioconf/20201700192.

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The article presents a study of centrifugal distributors. The advantages and disadvantages of their use are identified. Based on this, in order to improve technological means for the surface application of mineral fertilizers, it was proposed to develop a self-loading distributor for solid mineral fertilizers from soft containers, which in an aggregate with energy means would perform the functions of transporting mineral fertilizers to the field, loading them into the distributor bunker and their distribution over the surface of the field. It proves that the topic is relevant and is of great e

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17

Yue, Bing, Ziye Zhao, and Zengzhen Qian. "Influence of Five Additives on No Loading Swelling Potential of Red Clay." Applied Sciences 12, no. 7 (2022): 3455. http://dx.doi.org/10.3390/app12073455.

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In this study, cement, zeolite powder and three industrial by-products (blast furnace slag, steel slag, and fly ash) were selected as additives to study their effects on the swelling potential of red clay with different curing ages and dosages. At the same time, the mechanism of additives reducing the swelling potential of red clay was analyzed by scanning electron microscope (SEM) and X-ray fluorescence (XRF) tests. The X-ray diffraction (XRD) test was used to detect the clay mineral content of the red clay specimens before and after the modification to determine the change in the clay minera

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18

Xu, Jiankun, Rui Zhou, Danyang Xi, Yichao Lin, and Xibin Li. "Evolution Mechanisms of Three-Dimensional Fracture Fields in Coal Under Uniaxial Cyclic Loading and Unloading." Applied Sciences 15, no. 5 (2025): 2556. https://doi.org/10.3390/app15052556.

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In deep underground engineering applications, such as coal mining, coal–rock masses are frequently subjected to repeated loading and unloading conditions. Understanding the evolution mechanisms of their internal three-dimensional fracture fields has become a critical scientific challenge. This study utilized X-ray Microscopy (XRM) to observe changes in internal fractures of coal samples after each loading–unloading cycle, reconstructing the internal fractures and mineral particles. Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) were employed to analyze the surface

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19

Gao, Yuan, Guoqiang Liu, and Nan Jiang. "Characterization of Three-Dimensional Strong Force Chain Properties of Mineral Aggregate Mixtures Based on the Discrete Element Method." Buildings 14, no. 10 (2024): 3289. http://dx.doi.org/10.3390/buildings14103289.

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The skeleton structure composed of mineral aggregates is the main body to bear and transfer external loading in asphalt mixtures. To investigate the loading transfer mechanism of the mineral aggregate skeleton, the uniaxial penetration test and Discrete Element Method (DEM) were conducted for the Mineral Aggregate Mixture (MAM) to analyze its mechanical behavior. The three-dimensional strong force chain (SFC) was identified and evaluated based on the proposed recognition criterion and evaluation indices. The results indicate that 4.75 mm should be the boundary to distinguish the coarse and fin

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20

Skopintseva, O. V., and A. A. Buzin. "Dusting air loading and transportation of solid mineral resources." Mining informational and analytical bulletin 5, no. 10 (2019): 116–21. http://dx.doi.org/10.25018/0236-1493-2019-5-10-116-121.

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21

Ventura-Medina, E., N. Barbian, and J. J. Cilliers. "Solids loading and grade on mineral froth bubble lamellae." International Journal of Mineral Processing 74, no. 1-4 (2004): 189–200. http://dx.doi.org/10.1016/j.minpro.2003.11.001.

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22

An, Yuan Lin, Zhi Ming Liu, Gan Wang, and Wen Jian Wu. "Microstructure and Toughening Mechanism of Compressive Fractured Nacre." Advanced Materials Research 228-229 (April 2011): 727–31. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.727.

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Nacre of molluscan shells has evolved through millions of years to a level of perfect microstructure and excellent mechanical properties. Compressive strengths of nacre parallel and vertical to the surfaces of platelets are tested as 420MPa and 500MPa, respectively. The fracture surfaces are characterized by SEM and the fracture processes are analyzed. The toughening mechanism of compressive loading parallel to the aragonite platelet mainly includes cracks deflection, platelets disengagement, platelets crunch, platelet interlock, organic matrix bridging and mineral bridge. Comparably, the toug

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23

Zhang, H., X. Lü, Z. Huang, et al. "Multi-scale damage mechanisms of siltstone under combined dry–wet cycling and cyclic loading." Géotechnique Letters 15, no. 3 (2025): 1–6. https://doi.org/10.1680/jgele.25.00004.

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To investigate the combined effects of dry–wet cycling and cyclic loading on the macro- and micro-scale damage mechanisms of siltstones, a series of uniaxial fatigue tests are conducted. The cyclic stress–strain response of specimens subjected to dry–wet cycling initially exhibits a sparse distribution of hysteresis loops, which subsequently changes to a denser clustering before reverting to a more dispersed pattern, that is, ‘sparse-dense-sparse’ mode. Macroscopic failure patterns are primarily governed by the number of dry–wet cycling, with loading frequency exerting a comparatively minor in

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24

La Ode Alibin Akbar Tuminda, Endang Hartiningsih, Rahmat Indrajati, and Frans Simbol Tambing. "Studi Unjuk Kerja Peralatan Penambangan Nikel Berdasarkan Target Produksi pada Blok EHJ Pit Mawar dan Pit 3 di PT. Bumi Nikel Nusantara Desa Puuuwonua, Kecamatan Andowia, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara." Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan 2, no. 4 (2024): 340–49. https://doi.org/10.61132/globe.v2i4.754.

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Based on Ministry of Energy and Mineral Resources data, regarding the target achievement of mechanical equipment performance in mining companies, PT Bumi Nikel Nusantara has a level of achievement value of equipment performance less than the value set in the Minister of Energy and Mineral Resources Decree No.1827/2018. A mechanical equipment performance value can be achieved by examining ongoing mining activities on one mining front that includes loading and transportation activities. One of the efforts is to know the productive time, calculate the obstacle time and repair time of the equipmen

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25

Gupta, Anand, Suman Panthee, and Dr Janani Selvam. "Relationship between UCS and Anisotropic Angle: A Case Study for Slate of Himalaya Region." International Journal of Innovative Technology and Exploring Engineering 14, no. 2 (2025): 21–24. https://doi.org/10.35940/ijitee.d4598.14020125.

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The strength of rocks exhibits anisotropy, because of its mode of formation and its developing through different pressure and temperature environment. A rock can display anisotropy due to inhomogeneity, where sedimentary varying with the degree of the anisotropic plane. This strength anisotropy" refers to the change in intact rock strength under uniaxial loading conditions based on the orientation of anisotropy, the strength and deformation behavior of rocks under load is critical for underground excavations, mining, and civil engineering projects, as it directly impacts the stability of such

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26

Gómez Maqueo Anaya, Sofía, Dietrich Althausen, Matthias Faust, et al. "Implementation of mineralogy in COSMO5.05–MUSCAT and model dust loading comparison with measurements." E3S Web of Conferences 575 (2024): 02007. http://dx.doi.org/10.1051/e3sconf/202457502007.

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A mineralogical database is included in the simulation of mineral dust atmospheric life cycle for the chemistry and transport model COSMO5.05-MUSCAT. Evaluation of the ability of the model to reproduce the atmospheric drivers and the spatial-temporal resolution of mineral dust in the atmosphere is done through comparisons with remote sensing measurements in the Sahara Desert region for January-February 2022. Results show simultaneously good agreements and suggest that discrepancies could be explained due to the methods used for calculating mineral dust in the atmosphere not considering composi

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27

Cui, Longpeng, Chris Newcombe, Dagmar S. Urgast, Andrea Raab, Eva M. Krupp, and Jörg Feldmann. "Assessing the toxicity of arsenic-bearing sulfide minerals with the bio-indicator Corophium volutator." Environmental Chemistry 8, no. 1 (2011): 52. http://dx.doi.org/10.1071/en10044.

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Environmental context Risk identification and characterisation of As-bearing sulfide minerals, the most important natural source of arsenic pollution, is significant in pollution control and risk management at mine sites. Bioassays constitute a cost-efficient approach to toxicity testing because they give an integrated picture of the biologically available fraction thereby allowing predictions of the potential combined effects of contaminants in testing mixtures. Abstract A sediment-based toxicity test was designed to investigate the biological response of the amphipod Corophium volutator expo

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28

Pouya, Amade, Cheng Zhu, and Chloé Arson. "Self-consistent micromechanical approach for damage accommodation in rock-like polycrystalline materials." International Journal of Damage Mechanics 28, no. 1 (2017): 134–61. http://dx.doi.org/10.1177/1056789517747665.

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In quasi-brittle polycrystalline materials, damage by cracking or cleavage dominates plastic and viscous deformation. This paper proposes a micromechanical model for rock-like materials, incorporating the elastic-damage accommodation of the material matrix, and presents an original method to solve the system of implicit equations involved in the formulation. A self-consistent micromechanical approach is used to predict the anisotropic behavior of a polycrystal in which grain inclusions undergo intragranular damage. Crack propagation along planes of weakness with various orientation distributio

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29

Ishii, Yoshinori, Hideo Noguchi, Junko Sato, Koji Todoroki, Nobukazu Ezawa, and Shin-ichi Toyabe. "Preoperative Periarticular Knee Bone Mineral Density in Osteoarthritic Patients Undergoing TKA." Open Orthopaedics Journal 10, no. 1 (2016): 396–403. http://dx.doi.org/10.2174/1874325001610010396.

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Background: Preoperative periarticular bone quality is affected by joint loading. The purpose of this study was to determine the periarticular bone mineral density of the knee joint of patients undergoing total knee arthroplasty, and whether the location of the load-bearing axis correlates with the measured bone mineral density. Materials and Methods: The bone mineral densities of the medial and lateral femoral condyles and the medial and lateral tibial condyles were analyzed in consecutive 116 osteoarthritic patients (130 knees) by dual energy x-ray absorptiometry. Results: The median bone mi

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30

Jogl, Marcel, Pavel Reiterman, Ondřej Holčapek, Filip Vogel, and Petr Konvalinka. "Refractory Composites with Mineral Additive." Materials Science Forum 824 (July 2015): 49–53. http://dx.doi.org/10.4028/www.scientific.net/msf.824.49.

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Present paper deals with experimental study of refractories manufactured with environmentally friendly materials. Performed research was focused on the development of new type of high temperature resistant composites with mineral addition applied as cement supplementary material. To reach suitable resistance to temperatures was chosen binder system based on aluminous cement which was modified by metashale. Developed composites went through the gradual thermal loading and residual mechanical and basic physical properties were investigated. Realized program confirmed good potential for practical

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31

MacKelvie, K. J., H. A. McKay, K. M. Khan, and P. R. Crocker. "BONE MINERAL RESPONSE TO LOADING EXERCISE IS RELATED TO MATURITY." Medicine & Science in Sports & Exercise 33, no. 5 (2001): S146. http://dx.doi.org/10.1097/00005768-200105001-00828.

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32

Fehling, P. C., L. Alekel, J. Clasey, A. Rector, and R. J. Stillman. "A comparison of bone mineral densities among female athletes in impact loading and active loading sports." Bone 17, no. 3 (1995): 205–10. http://dx.doi.org/10.1016/8756-3282(95)00171-9.

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33

Suman, Panthee. "Relationship between UCS and Anisotropic Angle: A Case Study for Slate of Himalaya Region." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 14, no. 2 (2025): 21–24. https://doi.org/10.35940/ijitee.D4598.14020125.

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<strong>Abstract: </strong>The strength of rocks exhibits anisotropy, because of its mode of formation and its developing through different pressure and temperature environment. A rock can display anisotropy due to inhomogeneity, where sedimentary varying with the degree of the anisotropic plane. This "strength anisotropy" refers to the change in intact rock strength under uniaxial loading conditions based on the orientation of anisotropy, the strength and deformation behavior of rocks under load is critical for underground excavations, mining, and civil engineering projects, as it directly im

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34

Shan, Yi, Xing Wang, Jie Cui, Haihong Mo, and Yadong Li. "Effects of Clay Mineral Composition on the Dynamic Properties and Fabric of Artificial Marine Clay." Journal of Marine Science and Engineering 9, no. 11 (2021): 1216. http://dx.doi.org/10.3390/jmse9111216.

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Marine clays are easily affected by different mineral composition in cyclic load-based geological hazards. Therefore, based on analyzing the mineral composition of natural marine clay, it is the key to predict the dynamic properties of natural materials under cyclic loading by using quantitated artificial marine clay. In this study, the marine clay found in the South China Sea deltas was investigated. Based on the results of geological conditions and mineral composition analyses, raw non-clay minerals (such as quartz, albite) and clay minerals (such as Na-montmorillonite and kaolinite) were us

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35

Janik, LJ, and JO Skjemstad. "Characterization and analysis of soils using mid-infrared partial least-squares .2. Correlations with some laboratory data." Soil Research 33, no. 4 (1995): 637. http://dx.doi.org/10.1071/sr9950637.

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Infrared partial least squares (PLS) analysis is shown to provide a simple, rapid chemometric technique for the simultaneous analysis of soil properties. The method is capable of extracting both qualitative and quantitative information from soil spectra. A number of the mineral and organic components which are responsible for certain soil properties have been identified and the prediction of these properties assessed. Diffuse reflectance infrared Fourier-transform (DRIFT) spectra of whole soils were recorded to form a large training data set. The spectral information from this set was compress

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36

Milošević, M., M. Logar, B. Dojčinović, A. Rosić, and S. Erić. "Diffuse reflectance spectra of methylene blue adsorbed on different types of clay samples." Clay Minerals 51, no. 1 (2016): 81–96. http://dx.doi.org/10.1180/claymin.2016.051.1.07.

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AbstractDiffuse reflectance (DR) spectra in the visible (VIS) and near-infrared (NIR) region of methylene blue (MB) adsorbed on clay samples of different mineral composition and varying MB/clay ratios were analyzed. This type of investigation is not affected by unadsorbed MB molecules and can be used in clay-mineral determination. When the MB dye/clay loading was increased, enhancement of bands in the DR-VIS and DR-NIR was observed. The distribution of various MB aggregates was interpreted according to mineral composition and MB loading. The NIR spectrum of H2O overtone provides insights about

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37

Yan, Changbin, Xiao Xu, and Lei Huang. "Identifying the Impact Factors of the Dynamic Strength of Mudded Intercalations during Cyclic Loading." Advances in Civil Engineering 2018 (August 16, 2018): 1–9. http://dx.doi.org/10.1155/2018/5805294.

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Анотація:

Despite reports on previous research associated with the dynamic strength of mudded intercalations during cyclic loading, a systematic investigation of the impact factors of this strength is still valuable. This work aimed at experimentally revealing the impact factors of the strength along with their impacts. The potential impact factors considered in this work include (i) water content, (ii) clay mineral composition, (iii) clay content, (iv) confining pressure, and (v) cyclic failure time. Specimens of mudded intercalations were collected from China and were remolded and prepared for a dynam

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38

Lamare, M. L., J. Lee-Taylor, and M. D. King. "The impact of atmospheric mineral aerosol deposition on the albedo of snow and sea ice: are snow and sea ice optical properties more important than mineral aerosol optical properties?" Atmospheric Chemistry and Physics Discussions 15, no. 16 (2015): 23131–72. http://dx.doi.org/10.5194/acpd-15-23131-2015.

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Abstract. Knowledge of the albedo of polar regions is crucial for understanding a range of climatic processes that have an impact on a global scale. Light absorbing impurities in atmospheric aerosols deposited on snow and sea ice by aeolian transport absorb solar radiation, reducing albedo. Here, the effects of five mineral aerosol deposits reducing the albedo of polar snow and sea ice are considered. Calculations employing a coupled atmospheric and snow/sea ice radiative-transfer model (TUV-snow) show that the effects of mineral aerosol deposits is strongly dependent on the snow or sea ice ty

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39

Lamare, M. L., J. Lee-Taylor, and M. D. King. "The impact of atmospheric mineral aerosol deposition on the albedo of snow & sea ice: are snow and sea ice optical properties more important than mineral aerosol optical properties?" Atmospheric Chemistry and Physics 16, no. 2 (2016): 843–60. http://dx.doi.org/10.5194/acp-16-843-2016.

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Анотація:

Abstract. Knowledge of the albedo of polar regions is crucial for understanding a range of climatic processes that have an impact on a global scale. Light-absorbing impurities in atmospheric aerosols deposited on snow and sea ice by aeolian transport absorb solar radiation, reducing albedo. Here, the effects of five mineral aerosol deposits reducing the albedo of polar snow and sea ice are considered. Calculations employing a coupled atmospheric and snow/sea ice radiative-transfer model (TUV-snow) show that the effects of mineral aerosol deposits are strongly dependent on the snow or sea ice t

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40

Inman, Cynthia L., Gordon L. Warren, Harry A. Hogan, and Susan A. Bloomfield. "Mechanical loading attenuates bone loss due to immobilization and calcium deficiency." Journal of Applied Physiology 87, no. 1 (1999): 189–95. http://dx.doi.org/10.1152/jappl.1999.87.1.189.

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Our purpose was to determine the effects of a mechanical loading intervention on mass, geometry, and strength of rat cortical bone during a period of disuse concurrent with calcium deficiency (CD). Adult female rats were assigned to unilateral hindlimb immobilization, immobilized-loaded, or control (standard chow, 1.85% calcium) treatments. Both immobilized groups were fed a CD rat chow (0.01% calcium) to induce high bone turnover. Three times weekly, immobilized-loaded rats were subjected to 36 cycles of 4-point bending of the immobilized lower leg. After 6 wk, the immobilized rats exhibited

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41

Yılmaz Atay, Hüsnügül, and Erdal Çelik. "Electrical Behaviors of Flame Retardant Huntite and Hydromagnesite Reinforced Polymer Composites." ISRN Polymer Science 2012 (October 15, 2012): 1–9. http://dx.doi.org/10.5402/2012/359034.

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In our previous work, we studied the physical characteristics (particle size, surface treatment, etc.) of huntite/hydromagnesite mineral in order to be employed as a flame retardant filler. With this respect, electrical properties of the mineral reinforced polymeric composites were investigated in this study. After grinding of huntite/hydromagnesite mineral to the particle size of 10 μm, 1 μm, and 0.1 μm, phase and microstructural analyses were undertaken using X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The ground minerals with different

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42

Cavedon, Valentina, Marco Sandri, Carlo Zancanaro, and Chiara Milanese. "Assessing the Muscle–Bone Unit in Girls Exposed to Different Amounts of Impact-Loading Physical Activity—A Cross-Sectional Association Study." Children 11, no. 9 (2024): 1099. http://dx.doi.org/10.3390/children11091099.

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Background/Objectives: In children, an association exists between muscle and bone, as well as between physical activity and osteogenesis. Impact loading is a factor in increasing bone accrual during growth. In this work, we explored the muscle–bone association in girls exposed to long-term physical activity at different levels of impact loading. Methods: Four groups of girls aged 7–16 were considered. The curricular (C; n = 22) group only had curricular physical activity at school (2 h/w). In addition to curricular physical activity, the girls in the dance (D; n = 21), gymnastics at lower trai

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Kurilina, T., T. Pazenko, and S. Kurilin. "THERMODYNAMIC ANALYSIS OF REDOX REACTIONS OCCURRING DURING GALVANOCOAGULATION WASTEWATER TREATMENT." Construction and industrial safety, no. 32 (April 4, 2024): 85–91. http://dx.doi.org/10.29039/2413-1873-2024-32-85-91.

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Abstract. One of the most important environmental problems is the purification of industrial wastewater from heavy metal ions. Various methods are used to solve this problem: chemical, physico-chemical, sorption, but the most promising method for cleaning industrial wastewater containing heavy metal ions, namely copper, nickel and zinc, is the galvanocoagulation method. However, the literature does not sufficiently cover the processes of cementation of heavy metals on cathode loading. A physico-chemical approach to this process is necessary to confirm the process of separation of heavy metal i

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44

Gromyka, Dmitrii, and Eldar Kremcheev. "High temperature wear assessment of mining machines operating tools." E3S Web of Conferences 174 (2020): 03013. http://dx.doi.org/10.1051/e3sconf/202017403013.

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Анотація:

Mining is widely associated with the use of a variety of mining machines for various duties, such as extraction, loading and transportation of rock. Due to prolonged use of machines, the amount of wear of operating tools and machine parts increases. This problem is especially acute for mining and loading machines used in excavation and reclamation, because the wear rate is increased on those duties. The development of wear process and evaluation of the residual life of operating tools of mining and loading machines is well studied in world practice. However, given the variety of climatic, geol

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45

Nafees, Muhammad, Amir Waseem, and Abdur Rehman Khan. "Comparative Study of Laterite and Bentonite Based Organoclays: Implications of Hydrophobic Compounds Remediation from Aqueous Solutions." Scientific World Journal 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/681769.

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Four cost effective organoclays were synthesized, characterized, and studied for the sorption of hydrophobic compounds (edible oil/grease and hydrocarbon oil) from aqueous solutions. Organoclays were prepared by cation exchange reaction of lattice ions (present onto the surface of laterite and bentonite clay minerals) with two surfactants, hexadecyl trimethyl ammonium chloride (HDTMA-Cl) and tetradecyl trimethyl ammonium bromide (TDTMA-Br). Fourier transform infrared spectroscopy and scanning electron microscopy were used for the characterization of synthesized organoclays. It was found that t

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46

Lan, Shuai, Siyu Zhou, Qin Zhang, et al. "The Effect of Proton and Arsenic Concentration on As(III) Removal by Hematite and Kaolin Complexes." Adsorption Science & Technology 2021 (September 16, 2021): 1–8. http://dx.doi.org/10.1155/2021/3126767.

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With the intensification of human activities, arsenite (As(III)) pollutant from the soil and ground water has been a threat to human health, and the problem gradually becomes the focus of attention. In this study, the effects of several environment factors on As(III) removal ability of complex minerals are determined through the analysis of mineralogical characteristics of the complex synthesis of hematite and kaolin, using X-ray diffraction, Fourier transform infrared, and specific surface area. In the results, the XRD patterns of hematite and kaolin complexes indicate that the loading covers

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47

Sukhanov, A. E., D. I. Shishlyannikov, and D. S. Kormshchikov. "Improvement of Ural-20R borer miner loading augers." E3S Web of Conferences 266 (2021): 04005. http://dx.doi.org/10.1051/e3sconf/202126604005.

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Анотація:

The paper analyses haulage equipment features of the Ural-20R borer miner. The process of loading ore with an auger is accompanied by circulation and grinding. This negatively affects the efficiency of mineral processing and causes increased dust formation and the need to use energy-intensive methods to reduce the concentration of dust in the bottomhole space. The authors of the work justify the rational geometric parameters of the design of the loading auger of the Ural-20R combine, which will reduce the circulation and crushing of ore during loading.

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48

Zhang, Wen-Hao, Yuchan Zhou, Katherine E. Dibley, Stephen D. Tyerman, Robert T. Furbank, and John W. Patrick. "Review: Nutrient loading of developing seeds." Functional Plant Biology 34, no. 4 (2007): 314. http://dx.doi.org/10.1071/fp06271.

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Interest in nutrient loading of seeds is fuelled by its central importance to plant reproductive success and human nutrition. Rates of nutrient loading, imported through the phloem, are regulated by transport and transfer processes located in sources (leaves, stems, reproductive structures), phloem pathway and seed sinks. During the early phases of seed development, most control is likely to be imposed by a low conductive pathway of differentiating phloem cells serving developing seeds. Following the onset of storage product accumulation by seeds, and, depending on nutrient species, dominance

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49

A., U. Itodo, S. Eneji I., and A. Egbegbedia L. "Relationship between Metal Concentrations in Galena Ore and Soil Samples from Galena-rich Farmlands." Chemical Science International Journal 19, no. 2 (2017): 1–13. https://doi.org/10.9734/CSIJ/2017/32740.

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One of the Nigerian minerals (galena ore) within galena deposit region in Torkula, Benue state, was characterized along with its vicinity farmland soils for possible relationships in their geo-physico-chemical compositions. Both classical (titrimetric & gravimetric) and instrumental analytical techniques were adopted. Contamination factors revealed different categories of pollution by heavy metals while the metal loading in the ore and ore-rich soils shows no statistical difference for Pb and other key metals at p < 0.05. Hence, the possibility of leaching of toxic metals from mineral o

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Munro, Michael C., and Abbas Mohajerani. "Liquefaction Incidents of Mineral Cargoes on Board Bulk Carriers." Advances in Materials Science and Engineering 2016 (2016): 1–20. http://dx.doi.org/10.1155/2016/5219474.

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Liquefaction is a frequently occurring problem taking place when transporting wet granular solid bulk cargoes on board bulk carriers. Liquefaction of a solid bulk cargo can occur when excessive dynamic loading, induced by rough seas and vessel vibrations, is transmitted to the cargo. From 1988 to 2015, there have been 24 suspected liquefaction incidents reported, which resulted in 164 casualties and the loss of 18 vessels. The objective of this study is to investigate the collective causes of liquefaction of solid bulk cargoes on board bulk carriers in order to make recommendations to prevent

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