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Journal articles on the topic 'Multimineral method'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Cheng, Liwei, Manika Prasad, Reinaldo J. Michelena, et al. "Using rock-physics models to validate rock composition from multimineral log analysis." GEOPHYSICS 87, no. 2 (2022): MR49—MR62. http://dx.doi.org/10.1190/geo2020-0918.1.

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Multimineral log analysis is a quantitative formation evaluation tool for geologic and petrophysical reservoir characterization. Rock composition can be estimated by solving equations that relate log measurements to the petrophysical endpoints of minerals and fluids. Due to errors in log data and uncertainties in petrophysical endpoints of constituents, we have used effective medium models from rock physics as additional independent information to validate or constrain the results. We examine the Voigt-Reuss (VR) bound model, self-consistent approximation (SCA), and differential effective medi

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2

Feng, Zhou, Xin-Tong Li, Hong-Liang Wu, Shou-Ji Xia, and Ying-Ming Liu. "Multimineral optimization processing method based on elemental capture spectroscopy logging." Applied Geophysics 11, no. 1 (2014): 41–49. http://dx.doi.org/10.1007/s11770-014-0419-3.

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3

Li, Xuejiao, Wensheng Wang, Zhiqing Zhu, and Kunkun Zheng. "Investigation on Durability Behaviour and Optimization of Concrete with Triple-Admixtures Subjected to Freeze-Thaw Cycles in Salt Solution." Advances in Materials Science and Engineering 2021 (February 9, 2021): 1–16. http://dx.doi.org/10.1155/2021/5572011.

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In the seasonal frozen area of northeast China, cement concrete is usually in a working environment of cold climate and chlorine erosion coupling effect. In general, with a reasonable addition of air entraining agent (AEA) and multimineral admixtures such as fly ash, blast furnace slag, and silica fume, the durability of cement concrete under the effects of freeze-thaw and salt solution can be significantly improved in cold regions. However, due to several more compositions of cement concrete with multiple mineral admixtures, it would take excessive trial mixtures to select the desired mixture

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4

Chen, Pei, Renata Atkinson, and Wayne R. Wolf. "Single-Laboratory Validation of a High-Performance Liquid Chromatographic-Diode Array Detector-Fluorescence Detector/Mass Spectrometric Method for Simultaneous Determination of Water-Soluble Vitamins in Multivitamin Dietary Tablets." Journal of AOAC INTERNATIONAL 92, no. 2 (2009): 680–88. http://dx.doi.org/10.1093/jaoac/92.2.680.

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Abstract The purpose of this study was to develop a single-laboratory validated (SLV) method using high-performance liquid chromatography with different detectors diode array detector (DAD); fluorescence detector (FLD); and mass spectrometry (MS) for determination of 7 B-complex vitamins (B1-thiamin, B2-riboflavin, B3-nicotinamide, B6-pyridoxine, B9-folic acid, pantothenic acid, and biotin) and vitamin C in multivitamin/multimineral dietary supplements. The method involves the use of a reversed-phase octadecylsilyl column (4 m, 250 2.0 mm id) and a gradient mobile phase profile. Gradient eluti

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Saroji, Sudarmaji, Wandia Mellani Trihapsari, and Muhammad Destrayuda Trisna. "Implementation of Deterministic and Multimineral Method in Petrophysical Analysis for Identifying Low Resistivity Reservoir in Tesla Field, Air Benakat Formation, South Sumatera Basin." Aceh International Journal of Science and Technology 13, no. 3 (2025): 180–92. https://doi.org/10.13170/aijst.13.3.36698.

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The Tesla field is located in the South Sumatra Basin, where there is the Air Benakat Formation, with the constituent rocks being dominated by alternating sandstone and claystone so that it is a shaly sand environment with the potential to become a low-resistivity hydrocarbon reservoir. Hydrocarbon reservoirs generally have a resistivity log value of more than 10 Ωm; when a hydrocarbon reservoir has a low-resistivity value between 0.5 - 5 Ωm, it is referred to as a low-resistivity hydrocarbon reservoir. Initially, deterministic analysis was carried out to calculate the petrophysical parameters

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Felice, Valeria, Denise O’Gorman, Nora O’Brien, and Niall Hyland. "Bioaccessibility and Bioavailability of a Marine-Derived Multimineral, Aquamin-Magnesium." Nutrients 10, no. 7 (2018): 912. http://dx.doi.org/10.3390/nu10070912.

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Introduction: Magnesium is an essential mineral involved in a range of key biochemical pathways. Several magnesium supplements are present on the market and their degree of bioavailability differs depending on the form of magnesium salt used. Aquamin-Mg is a natural source of magnesium, containing 72 additional trace minerals derived from the clean waters off the Irish coast. However, the in vitro bioaccessibility and bioavailability of Aquamin-Mg in comparison with other supplement sources of magnesium has yet to be tested. Method: Aquamin-Mg, magnesium chloride (MgCl2) and magnesium oxide (M

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Clarke, D. L., and A. P. Clare. "AN INTEGRATED PETROPHYSICAL WORKFLOW TO GENERATING FLUID SUBSTITUTED LOGS FOR AVO CHARACTERISATION—GIPSY AND NORTH GIPSY FIELDS CASE STUDY, NORTH WEST SHELF, AUSTRALIA." APPEA Journal 42, no. 1 (2002): 477. http://dx.doi.org/10.1071/aj01026.

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As part of a multi-well field study an integrated petrophysical workflow was developed to include the generation of fluid substituted logs for AVO characterisation.The workflow relied upon the construction of a multimineral model that best approximated the actual mineral content of the reservoir. Any limitations or assumptions were noted and taken into account when creating the multi-mineral model. Other petrophysical results were derived from the same model to validate its consistency such as intrinsic permeability, porosity, water saturation, etc. Iteration between the model and the results

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Nicolás-López, Rubén, Oscar C. Valdiviezo-Mijangos, Jaime Meléndez-Martínez, and Valeriy M. Levin. "A multimineral Rock Physics Template built from the Perfectly Disordered Method for shale lithology interpretation." Journal of Petroleum Science and Engineering 176 (May 2019): 532–36. http://dx.doi.org/10.1016/j.petrol.2019.01.095.

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9

Liu, Mingxin, Yongfei Yang, Fugui Liu, et al. "Thermal disturbance anisotropy and structural stability in deep multimineral granular systems: A discrete element method study." Geothermics 132 (November 2025): 103439. https://doi.org/10.1016/j.geothermics.2025.103439.

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10

Burke, Lauri A., Justin E. Birdwell, and Stanley T. Paxton. "Multimineral petrophysics of thermally immature Eagle Ford Group and Cretaceous mudstones, U.S. Geological Survey Gulf Coast 1 research wellbore in central Texas." Interpretation 10, no. 1 (2021): T151—T165. http://dx.doi.org/10.1190/int-2021-0094.1.

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Traditional petrophysical methods to evaluate organic richness and mineralogy using gamma-ray and resistivity log responses are not diagnostic in source rocks. We have developed a deterministic, nonproprietary method to quantify formation variability in total organic carbon (TOC) and three key mudrock mineralogical components of nonhydrocarbon-bearing source rock strata of the Eagle Ford Group by developing a set of log-derived multimineral models calibrated with Fourier transform infrared spectroscopy core data from the research borehole U.S. Geological Survey Gulf Coast 1 West Woodway. We de

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Yu, Anghong, Haizeng Liu, Chuanzhen Wang, et al. "Online Ash Content Monitor by Automatic Composition Identification and Dynamic Parameter Adjustment Method in Multicoal Preparation." Processes 10, no. 8 (2022): 1432. http://dx.doi.org/10.3390/pr10081432.

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The online measurement of coal ash has overcome the shortcomings of chemical tests. However, there could be large fluctuations and errors in the results of online ash monitors because of the transient change in coal quality resulting from different geological conditions in the mining process. In this study, to resolve the problems of the dual-energy γ-ray online ash monitor in the Linhuan Coal Preparation Plant, we investigated the internal factors, such as the composition of multimineral and multicoal, and external factors, such as the moisture and impurities, which affect the measurement res

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Patil, Suyog S., and Ashwini K. Srivastava. "Development and Validation of Rapid Ion-Pair RPLC Method for Simultaneous Determination of Certain B-Complex Vitamins Along with Vitamin C." Journal of AOAC INTERNATIONAL 95, no. 1 (2012): 74–83. http://dx.doi.org/10.5740/jaoacint.11-014.

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Abstract A rapid, simple, and accurate ion-pair RPLC method has been developed for simultaneous analysis of vitamin C and major B-complex vitamins. An RP C18 column thermostated at 30°C was used with gradient elution of mobile phase comprising 10 mM potassium dihydrogen phosphate buffer (containing 3 mM sodium hexane-1-sulfonate, adjusted to pH 2.80 with o-phosphoric acid) and methanol at a flow rate of 1.0 mL/min to achieve the best possible separation and resolution of all vitamins in about 11.00 min. The detection was performed at 274 nm. The method has been implemented successfully for sim

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Sánchez, María C., Ana Herráiz, María J. Ciudad, et al. "Metabolomics and Biochemical Benefits of Multivitamin and Multimineral Supplementation in Healthy Individuals: A Pilot Study." Foods 13, no. 14 (2024): 2207. http://dx.doi.org/10.3390/foods13142207.

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Scientific evidence regarding the effectiveness of vitamin and mineral supplements in healthy individuals remains scarce. In a randomized, double-blind study, 30 healthy individuals were assigned to receive a single daily dose of multivitamin and multimineral supplementation or a double daily dose for 30 days. Before and after the intake, an untargeted metabolomics assay for serum metabolites was conducted by hydrophilic interaction liquid chromatography–mass spectrometry, and clinical assessments of peripheral blood samples were performed. A paired t-test for metabolic analysis, adjusted usin

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Wallace, Taylor, Cara Frankenfeld, Balz Frei, et al. "Multivitamin Use Is Associated with Increased Micronutrient Intakes and Biomarkers and Decreased Prevalence of Inadequacies in Middle-Aged and Older Adults." Current Developments in Nutrition 4, Supplement_2 (2020): 1501. http://dx.doi.org/10.1093/cdn/nzaa061_129.

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Abstract Objectives Micronutrient inadequacies are common in older adults. We sought to assess if multivitamin/multimineral supplement (MVM) use improved micronutrient intake and biomarker status among older adults enrolled in NHANES. Methods The National Cancer Institute Method was used to estimate usual intakes of 18 micronutrients stratified by age and frequency of MVM use. Insufficiency and deficiency prevalence were evaluated using nutrient biomarkers. Results Compared with food alone, MVM use was associated with higher nutrient intake and lower prevalence of inadequacies of almost all mi

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El-Maghrabey, Mahmoud, Shōta Seino, Naoya Kishikawa, and Naotaka Kuroda. "The Development of a Selective Colorimetric Sensor for Cu2+ and Zn2+ in Mineral Supplement with Application of a Smartphone Paper-Based Assay of Cu2+ in Water Samples." Sensors 24, no. 23 (2024): 7844. https://doi.org/10.3390/s24237844.

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Herein, we developed a colorimetric method for the determination of Cu2+ and Zn2+ using NBD-G as a novel selective metal sensor. NBD-G was easily synthesized by a nucleophilic substitution reaction between 4-chloro-7-nitro-2,1,3-benzoxadiazole (NBD-Cl) and Girard’s Reagent P. The NBD-G solution is yellow, but when it reacts with Cu2+ and Zn2+, its color changes selectively to red (510 nm) and orange (480 nm), respectively. NBD-G was used as a sensor for Cu2+ and Zn2+, showing a high sensitivity down to 0.77 µM for Cu2+ and 1.66 µM for Zn2+. NBD-G could determine both metals simultaneously; thu

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CASONI, Dorina, Michaela PONTA, Mihaela-Nicoleta BIBICA, Ioana-Violeta LAZAR, and Tiberiu FRENTIU. "A free non-spectral interferences method based on inductively coupled plasma optical emission spectrometry for multielemental determination in multimineral/multivitamin preparations." Revue Roumaine de Chimie 65, no. 6 (2020): 573–78. http://dx.doi.org/10.33224/rrch.2020.65.6.07.

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17

Szabó, Norbert Péter, and Mihály Dobróka. "Robust estimation of reservoir shaliness by iteratively reweighted factor analysis." GEOPHYSICS 82, no. 2 (2017): D69—D83. http://dx.doi.org/10.1190/geo2016-0393.1.

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We suggest a statistical method for the simultaneous processing of electric, nuclear, and sonic-logging data using a robust iteratively reweighted factor analysis (IRFA). After giving a first estimate by Jöreskog’s approximate method, we refine the factor loadings and factor scores jointly in an iterative procedure, during which the deviation between the measured and calculated data is weighted in proportion to its magnitude for giving an outlier-free solution. We show a strong nonlinear relation between the first factor and the shale volume of multimineral hydrocarbon formations. We test the

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Mohd Zaki, Nor Azian, Mohd Naim Rasidi, S. Maria Awaluddin, Tee Guat Hiong, Hasimah Ismail, and Noor Safiza Mohamad Nor. "Prevalence and Characteristic of Dietary Supplement Users in Malaysia: Data From the Malaysian Adult Nutrition Survey (MANS) 2014." Global Journal of Health Science 10, no. 12 (2018): 127. http://dx.doi.org/10.5539/gjhs.v10n12p127.

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BACKGROUND: There has been an increase trend of dietary supplements intake among Malaysians over the last decade. The aim of this study was to determine the prevalence and characteristic of dietary supplements users among adults in Malaysia. METHODS: Data of 3000 respondents aged 18&ndash;59 years from the Malaysian Adult Nutrition Survey (MANS) 2014 were utilized. A multi-stage stratified sampling method was employed and eligible respondent from each household was selected using Kish method. Validated questionnaire was used to gather information on vitamin/mineral supplements (VMS) and fo

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19

Heidari, Zoya, Carlos Torres-Verdín, and William E. Preeg. "Improved estimation of mineral and fluid volumetric concentrations from well logs in thinly bedded and invaded formations." GEOPHYSICS 77, no. 3 (2012): WA79—WA98. http://dx.doi.org/10.1190/geo2011-0454.1.

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Calculation of mineral and fluid volumetric concentrations from well logs is one of the most important outcomes of formation evaluation. Conventional estimation methods assume linear or quasi-linear relationships between volumetric concentrations of solid/fluid constituents and well logs. Experience shows, however, that the relationship between neutron porosity logs and mineral concentrations is generally nonlinear. More importantly, linear estimation methods do not explicitly account for shoulder-bed and/or invasion effects on well logs, nor do they account for differences in the volume of in

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20

Li, Kelei, Chunxiao Liu, Xiaotong Kuang, Qingxue Deng, Feng Zhao, and Duo Li. "Effects of Multivitamin and Multimineral Supplementation on Blood Pressure: A Meta-Analysis of 12 Randomized Controlled Trials." Nutrients 10, no. 8 (2018): 1018. http://dx.doi.org/10.3390/nu10081018.

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Previous studies have not drawn a consistent conclusion about effect of multivitamin and multimineral supplementation (MVMS) on blood pressure. A comprehensive search of PubMed, Embase and Cochrane Library (up to May 2018) and references of relevant articles was undertaken. The present meta-analysis included 12 randomized controlled trials (RCTs), of which eight RCTs in 2011 subjects evaluated the effect of MVMS on blood pressure and four RCTs in 21,196 subjects evaluated the effect of MVMS on the risk of hypertension. MVMS had a lowering effect on systolic blood pressure (SBP) and diastolic b

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Priyanka, Feni, Ordas Dewanto, Bagus Sapto Mulyatno, and Riezal Ariffiandhany. "KLASIFIKASI PETROFISIKA TIPE BATUAN UNTUK MEMPREDIKSI KUALITAS RESERVOAR PASIR SERPIHAN PADA FORMASI TALANG AKAR, CEKUNGAN ONWJ." Jurnal Geofisika Eksplorasi 4, no. 3 (2020): 28–40. http://dx.doi.org/10.23960/jge.v4i3.39.

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Hydrocarbons were accumulated in reservoir, the reservoir has a lot of types depending on the geological conditions and the constituent mineral. In ONWJ basins, sub-basins Arjuna, Talang Akar Formation is sand splintersreservoir type. The presence of clay in a reservoir will reduce the resistivity and increase thesaturation, so it takes a multimineral analysis and the reservoir qualityclassification. In this study, physical properties (porosity, permeability, Rw, and saturation) and the quality of the reservoir can be identified through petrophysical analysis by utilizing log data and core ana

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Lis-Śledziona, Anita. "Multiscale evaluation of a thin-bed reservoir." Geology, Geophysics and Environment 47, no. 1 (2021): 5–20. http://dx.doi.org/10.7494/geol.2021.47.1.5.

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A thin-bed laminated shaly-sand reservoir of the Miocene formation was evaluated using two methods: high resolution microresistivity data from the XRMI tool and conventional well logs. Based on high resolution data, the Earth model of the reservoir was defined in a way that allowed the analyzed interval to be subdivided into thin layers of sandstones, mudstones, and claystones. Theoretical logs of gamma ray, bulk density, horizontal and vertical resistivity were calculated based on the forward modeling method to describe the petrophysical properties of individual beds and calculate the clay vo

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Grigor’eva, A. V., V. M. Kozlovskiy, G. A. Gridin, and A. A. Ostapchuk. "METAMORPHIC TRANSFORMATIONS OF ROCKS IN THE CENTRAL PART OF THE PRIMORSKY FAULT. WESTERN BAIKALIA." Доклады Российской академии наук. Науки о Земле 511, no. 2 (2023): 198–205. http://dx.doi.org/10.31857/s2686739723600807.

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In this paper we compare metamorphic transformations in acid and mafic rocks in a zone of intense tectonic movements. The object of study is the exhumed part of damage zone of Primorsky fault – main collision suture, which connects the Siberian Craton and the Olkhon Terrane. The studied area is located near the Khorga River. Collected metamorphic rock samples are represented by both acid (plagiogranitegneiss) and mafic (amphibole-biotite plagiogneisses) rocks. The samples present two different parent rocks contacting each other but differ in chemical composition. The formation of identical met

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Brämswig, Susanne, Reinhild Prinz-Langenohl, Yvonne Lamers, et al. "Supplementation with a multivitamin containing 800 µg of folic acid shortens the time to reach the preventive red blood cell folate concentration in healthy women." International Journal for Vitamin and Nutrition Research 79, no. 2 (2009): 61–70. http://dx.doi.org/10.1024/0300-9831.79.2.61.

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Background: The lowest risk of having a child with a neural tube defect (NTD) was related to red blood cell (RBC) folate concentrations of >906 nmol/L. For NTD prevention, it is recommended that women use periconceptional supplementation of 400 µg/day folic acid. Using this dose previous studies indicate that RBC folate >906 nmol/L was not reached within four weeks of supplementation. Objective: The effectiveness of a multivitamin/multimineral supplement containing 800 µg folic acid (verum) was evaluated using RBC folate concentration exceeding 906 nmol/L as primary endpoint. In addition

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Heidari, Zoya, and Carlos Torres-Verdín. "Inversion-based method for estimating total organic carbon and porosity and for diagnosing mineral constituents from multiple well logs in shale-gas formations." Interpretation 1, no. 1 (2013): T113—T123. http://dx.doi.org/10.1190/int-2013-0014.1.

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Reliable estimates of petrophysical and compositional properties of organic shale are critical for detecting perforation zones or candidates for hydro-fracturing jobs. Current methods for in situ formation evaluation of organic shale largely rely on qualitative responses and empirical formulas. Even core measurements can be inconsistent and inaccurate when evaluating clay minerals and other grain constituents. We implement a recently introduced inversion-based method for organic-shale evaluation from conventional well logs. The objective is to estimate total porosity, total organic carbon (TOC

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Fraga, Edmundo, Ana Cuesta, Jesus Zea-Garcia, Angeles De la Torre, Armando Yáñez-Casal, and Miguel Aranda. "Rietveld Quantitative Phase Analysis of Oil Well Cement: In Situ Hydration Study at 150 Bars and 150 °C." Materials 12, no. 12 (2019): 1897. http://dx.doi.org/10.3390/ma12121897.

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Oil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer. However, for a proper understanding of the performance of these cements in the field, the reactivity of every component, in real-world conditions, must be analysed. To date, in situ high energy synchrotron powder diffraction studies of hydrating oil well cement pastes have been carried out, but the quality of the data was not appropriated for Rietveld quantitative phase a

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Jun, Jia, Xue Kunlin, Ni Liping, Luo Yang, and Liu Yuchao. "Logging Response Mechanism and Content Evaluation of Laumontite-Bearing Glutenite Reservoir: A Case Study of Lower Urho Formation of Permian of the Junggar Basin." Geofluids 2024 (March 6, 2024): 1–13. http://dx.doi.org/10.1155/2024/1592800.

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The Urho Formation in the Lower Permian System at the Junggar Basin in China commonly develops zeolite cements. The presence of zeolite minerals in various states of occurrence and uneven distribution in glutenite reservoirs makes it indeterminate to interpret the well logging response characteristics such as acoustic, resistivity, radioactivity, and nuclear magnetic resonance (NMR). This poses significant challenges for the evaluation of well loggings in glutenite reservoirs containing laumontite and the determination of oil and gas reserves. In this study, through petrophysics experiments su

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Mattavelli, Margherita G. M., Giacomo Piccininni, Gabriel F. Toti, et al. "Iron Supply of Multivitamins–Multiminerals Commercialized Online by Amazon in Western and Southern Europe: A Labeling Analysis." Nutrients 16, no. 18 (2024): 3140. http://dx.doi.org/10.3390/nu16183140.

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Background. In high-income countries, shopping for non-prescription multivitamin–multimineral supplements has tremendously increased. Objective and Methods. The purpose of this labeling analysis is to inform on the daily elemental iron (with or without vitamin C) supply provided by multivitamin–multimineral supplements sold online by Amazon in Western and Southern Europe (amazon.es®, amazon.de®, amazon.it®, and amazon.fr®). Results. We identified 298 iron-containing multivitamin–multimineral preparations sold by Amazon marketplaces: 153 preparations sourced from amazon.de®, 68 from amazon.fr®,

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Kumar, Sunaj, Debarati Mishra, Soma Chatterjee, R. R. Tiwari, and V. L. N. Avadhani. "Rock Physics Modeling of Gas Hydrate Reservoirs Through Integrated Core and Well-Log Data in NGHP-02 Area in KG Offshore Basin, India." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 63, no. 2 (2022): 237–55. http://dx.doi.org/10.30632/pjv63n2-2022a6.

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Since gas hydrates are unconventional reservoirs, they pose unique challenges for identification, characterization, quantification, and extraction. The conventional approach—elastic logs—can provide a better method for identification through attribute analysis. On the other hand, geomechanical studies for wellbore stability analysis pave the way for the effective exploitation of gas hydrates. It is crucial to predict elastic logs against gas-hydrate-bearing sediments, which requires an effective rock physics model. In the present work, a study pertaining to the National Gas Hydrate Program-02

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Carpenter, Chris. "Subsurface Data Reveal Pore-Pressure Variations in Shale Basins." Journal of Petroleum Technology 77, no. 02 (2025): 82–85. https://doi.org/10.2118/0225-0082-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper URTeC 4042140, “Regional Pore-Pressure Variations of the Wolfcamp, Dean, Spraberry, and Bone Spring Formations of the Midland and Delaware Basins in the USA,” by Shuvajit Bhattacharya, Ray Eastwood, and Katie Smye, The University of Texas at Austin, et al. The paper has not been peer reviewed. _ The authors study regional pore-pressure variations in the Leonardian and Wolfcampian producing strata (Wolfcamp, Bone Spring, Avalon, Dean, and Spraberry) in the Midland and Delaware Basins of West Texas and

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Fanani, Anhar Faisal, Nurul Fajrih, and Wa Laili Salido. "Penggunaan Minyak Ikan dalam Ransum Ayam Kampung terhadap Profil Lemak Darah." Jurnal Ilmu dan Teknologi Peternakan Tropis 6, no. 1 (2019): 14. http://dx.doi.org/10.33772/jitro.v6i1.5572.

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ABSTRAKTujuan penelitian adalah mengevaluasi level penambahan minyak ikan lemuru dalam ransum ayam kampung terhadap profil lemak darah.Materi penelitian yang digunakan adalahayam kampung betina umur 24 minggu. Bahan pakan yang digunakan adalah minyak ikan lemuru, bekatul, jagung giling, bungkil kedelai, minyak sawit, tepung ikan, dan premix multi mineral dan vitamin. Metode penelitian menggunakan rancangan acak lengkap (RAL). Perlakuan yang diberikan adalah T0 = Penggunaan minyak ikan lemuru sebanyak 0%, T1 = Penggunaan minyak ikan lemuru sebanyak 2%, T2 = Penggunaan minyak ikan lemuru sebanya

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Cavalleri, Chiara, Gerrit Brouwer, Dimas Kodri, David Rose, and Jan-Bart Theodoor Brinks. "Maximizing the Value of Pulsed-Neutron Logs: A Complex Case Study of Gas Pressure Assessment Through Casing." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 61, no. 6 (2020): 610–22. http://dx.doi.org/10.30632/pjv61n6-2020a6.

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Casedhole logging for formation evaluation and input to determine the redevelopment potential of an oil producer with a challenging production history was conducted. This included an intelligent assessment of formation gas pressure through casing, which was later confirmed by perforating. The target reservoirs are Triassic sandstones drilled as a gas exploration prospect. Based on openhole log data, the prospect appeared to be oil bearing. The well has been producing oil for several years and is now a candidate for a gas cap blowdown. The presence of heterogeneous layers with varied rock quali

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Alfahaid, Fahad, Shamshad Begum Loni, Mohammed Zaid Aljulifi, et al. "Multivitamin- Multimineral (MVMM) Use Among Saudi Adults In Al-Majmah, Saudi Arabia: Prevalence and associated Factors." Journal of Pioneering Medical Sciences 14, Special Issue 1 (2025): 68–76. https://doi.org/10.47310/jpms202514s0109.

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Introduction: A nutritious diet is essential for sustaining good health and preventing illness. Globally, billions of people take dietary supplements like Multivitamin-Multimineral (MVMM) preparations to improve their health, prevent diseases, or fill vitamin and mineral shortages. This current study was carried out to determine the prevalence and characteristics of Multivitamin- Multimineral (MVMM) use among Saudi populations in Al-Majmaah, Saudi Arabia. Methods: A descriptive cross-sectional study as conducted in Majmah, Saudi Arabia, where all adults age above 18 years old were enrolled in

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Lopez-Cepero, Andrea, Roxana Torres, Augusto Elias, Milagros C. Rosal, and Cristina Palacios. "Micronutrient Intake among Children in Puerto Rico: Dietary and Multivitamin-Multimineral Supplement Sources." International Journal for Vitamin and Nutrition Research 85, no. 5-6 (2015): 329–39. http://dx.doi.org/10.1024/0300-9831/a000252.

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Abstract. Background: Micronutrients are critical for healthy growth and development of children. Micronutrient intake from dietary sources is inadequate among some children and may be improved by use of multivitamin and multimineral (MVMM) supplements. Objective: To assess micronutrient intake from dietary and MVMM supplement sources among 12-year-old children in Puerto Rico. Methods: A representative sample of 732 children enrolled in an oral health study in Puerto Rico, who completed dietary and MVMM assessments through one 24-h recall, were included in this analysis. Micronutrient intake s

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Robert, M., M. Hardy, and F. Elsass. "Crystallochemistry, properties and organization of soil clays derived from major sedimentary rocks in France." Clay Minerals 26, no. 3 (1991): 409–20. http://dx.doi.org/10.1180/claymin.1991.026.3.09.

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AbstractThe nature, crystallochemistry, organization and surface properties of soil clays derived from the most representative sedimentary formations of France are described, using qualitative and quantitative mineralogical methods and high resolution transmission microscopy (HRTEM). The main results show that soil clays differ significantly from reference clays. Even when 2:1 phyllosilicates are dominant, the clays always contain multimineral phases. The smectitic component is dioctahedral and of beidellite type. Soil clay organization is specific: all the clay particles have a short lateral

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Gehring, A. U., and R. Karthein. "An ESR and calorimetric study of iron oolitic samples from the Northampton ironstone." Clay Minerals 25, no. 3 (1990): 303–11. http://dx.doi.org/10.1180/claymin.1990.025.3.06.

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AbstractElectron spin resonance (ESR) spectroscopy and calorimetric methods were used to characterize conversion processes in multimineral samples from the Northampton ironstone (NIS) at temperatures between 25°C and 800°C. The beginning of the thermal conversion processes can be determined by the formation of asymmetric ESR spectra with g ≈ 2 at 250°C. The breakdown of the berthierine structure between 250°C and 520°C is indicated by the disappearance of the hyperfine splitting in the Mn2+ spectrum and the formation of magnetite. The decomposition of siderite and calcite was found by calorime

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Bhalerao, Pramod P., and Chandrakant S. Waghmare. "Drug utilisation study in medicine outpatient department at Ashwini Rural Medical College, Kumbhari, Solapur, India." International Journal of Basic & Clinical Pharmacology 8, no. 8 (2019): 1919. http://dx.doi.org/10.18203/2319-2003.ijbcp20193203.

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Background: Drug utilization studies are used to analyze different aspects of the use of drugs and to implement methods of improving therapeutic quality. This study was conducted to study drug prescription pattern in Medicine Outpatient Department (OPD) in Ashwini Rural Medical College, Kumbhari. Methods: Six hundred prescriptions were screened & analyzed as per the study parameters at Medicine OPD of Ashwini Rural Medical College, Kumbhari. Study parameters like demographic profile of the patient like age, sex and diagnosis were recorded. Doctor details and patient details like age, sex a

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Fu, Lei, Yanxiang Yu, Chicheng Xu, et al. "Well-Log-Based Reservoir Property Estimation With Machine Learning: A Contest Summary." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 65, no. 1 (2024): 108–27. http://dx.doi.org/10.30632/pjv65n1-2024a6.

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Well logs are processed and interpreted to estimate in-situ reservoir properties, which are essential for reservoir modeling, reserve estimation, and production forecasting. While the traditional methods are mostly based on multimineral physics or empirical formulae, machine learning provides an alternative data-driven approach that requires much less a-priori geological or petrophysical information. From October 2021 to March 2022, the Petrophysical Data-Driven Analytics Special Interest Group (PDDA SIG) of the Society of Petrophysicists and Well Log Analysts (SPWLA) hosted a machine-learning

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Mellal, Ilyas, Abdeljalil Latrach, Vamegh Rasouli, Omar Bakelli, Abdesselem Dehdouh, and Habib Ouadi. "Water Saturation Prediction in the Middle Bakken Formation Using Machine Learning." Eng 4, no. 3 (2023): 1951–64. http://dx.doi.org/10.3390/eng4030110.

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Tight reservoirs around the world contain a significant volume of hydrocarbons; however, the heterogeneity of these reservoirs limits the recovery of the original oil in place to less than 20%. Accurate characterization is therefore needed to understand variations in reservoir properties and their effects on production. Water saturation (Sw) has always been challenging to estimate in ultra-tight reservoirs such as the Bakken Formation due to the inaccuracy of resistivity-based methods. While machine learning (ML) has proven to be a powerful tool for predicting rock properties in many tight for

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Pillich, C., T. Bogdan, J. Landers, G. Wurm, and H. Wende. "Drifting inwards in protoplanetary discs." Astronomy & Astrophysics 652 (August 2021): A106. http://dx.doi.org/10.1051/0004-6361/202140601.

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In previous laboratory experiments, we measured the temperature dependence of sticking forces between micrometer grains of chondritic composition. The data showed a decrease in surface energy by a factor ~5 with increasing temperature. Here, we focus on the effect of surface water on grains. Under ambient conditions in the laboratory, multiple water layers are present. At the low pressure of protoplanetary discs and for moderate temperatures, grains likely only hold a monolayer. As dust drifts inwards, even this monolayer eventually evaporates completely in higher temperature regions. To accou

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Li, Nianqi, Li-Yun Fu, Jian Yang, and Tongcheng Han. "On three-stage temperature dependence of elastic wave velocities for rocks." Journal of Geophysics and Engineering 18, no. 3 (2021): 328–38. http://dx.doi.org/10.1093/jge/gxab017.

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Abstract For most rocks, the typical temperature behavior of elastic wave velocities generally features a three-stage nonlinear characteristic that could be expressed by a reverse S-shape curve with two inflexion points. The mechanism regulating the slow-to-fast transition of elastic constants remains elusive. The physics of critical points seems related to the multimineral composition of rocks with differentiated thermodynamic properties. Based on laboratory experiments for several rocks with different levels of heterogeneity in compositions, we conduct theoretical and empirical simulations b

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Jiang, Yan, Xuhui Chen, Zhen Cai, Ying Yao, and Shuaiwen Huang. "Trends and Motivations in Dietary Supplement Use Among People with Diabetes: A Population-Based Analysis Using National Health and Nutrition Examination Survey Data from the 2009–2020 Period." Nutrients 16, no. 23 (2024): 4021. http://dx.doi.org/10.3390/nu16234021.

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Objectives: Dietary supplements have gained attention among people with diabetes as an alternative and complementary treatment, yet there is a limited understanding of supplement use and the motivations behind it. Methods: Data from the National Health and Nutrition Examination Survey (NHANES) from the 2009–2020 period were analyzed, including data on 5784 people with diabetes aged 20 years or older. Dietary supplement use was self-reported. Trends in supplement use were examined across three periods: 2009–2012, 2013–2016, and 2017–2020. Statistical analyses were conducted while considering NH

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Gacek, Maria, Agnieszka Wojtowicz, and Adam Popek. "Personality Determinants Related to the Use of Selective and Effective Dietary Supplements by Elite Polish Team Sport Athletes." Sports 12, no. 1 (2024): 29. http://dx.doi.org/10.3390/sports12010029.

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Introduction: The purpose of this research was to analyse relationships between personality traits and the use of selected dietary supplements among Polish athletes training in team sports. This subject matter has not been explored in prior research. Material and Methods: This research was carried out among a group of 213 athletes (men) in the 18–36 age range, with the implementation of a proprietary validated questionnaire for the use of dietary supplements and the NEO-PI-R inventory (Neuroticism–Extraversion–Openness Personality Inventory—Revised). Statistical analyses were performed with th

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Ryabova, Yuliya V., Lada V. Shabardina, Aleksandr A. Keskevich, et al. "Neurotoxic effects of cadmium chloride exposure combined with physical activity and protective effect of bioprophylactic agents." Hygiene and sanitation 103, no. 2 (2024): 165–71. http://dx.doi.org/10.47470/0016-9900-2024-103-2-165-171.

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Introduction. Chemical compounds possessing of a neurotropic effect are extremely widespread in industry, which makes the problem of neurotoxicity relevant for occupational medicine. Since industrial workers are often exposed to a combination of both physical and chemical work-related risk factors, a complex adverse health effect of the latter should be considered. Our objective was to study neurotoxic effects of exposure to cadmium chloride combined with physical activity in a subchronic experiment on rats and assess the efficacy of a biological prophylactic complex. Material and

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Yan, Xiaoxue, Shuaichao Wei, Wei Zhang, Feng Liu, and Yuzhong Liao. "Reservoirs and Hydrogeochemical Characterizations of the Yanggao Geothermal Field in Shanxi Province, China." Water 16, no. 5 (2024): 669. http://dx.doi.org/10.3390/w16050669.

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Geothermal water is the product of deep circulation within the crust, and the understanding of its hydrogeochemical process can provide effective information for integrated research on its circulation pattern and formation mechanism. Based on the geothermal geological conditions of the Yanggao geothermal field, this study analyzed water samples from thermal springs and geothermal wells in the geothermal field, ascertaining their hydrochemical components, along with their hydrogen and oxygen isotopes. Using methods like piper diagrams, ionic component ratio characterization, Na–K–Mg equilibrium

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Afsan, Mohammad, Muhammad Mahbubul Alam, Nushrat Noor, and AH Hamid Ahmed. "Prescribing patterns of a garment medical centre in Bangladesh." Update Dental College Journal 3, no. 1 (2014): 7–11. http://dx.doi.org/10.3329/updcj.v3i1.17978.

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Objectives: The aim of the study was to audit the prescription and dispensing pattern in a garment medical center to observe the rational use of drug. Irrational use of medicine is a global problem. Polypharmacy, injudicial use of antibiotics, unnecessary use of vitamins are commonly seen in Bangladesh. To find out the current status of the prescribing and dispensing practices and identify factors underlying irrational prescription writing in a Garment medical center for factory workers in Gajipur and to sensitize the future prescribers about the rational prescriptions, this study was carried

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Pothana, Prasad, Ghoulem Ifrene, and Kegang Ling. "Integrated Petrophysical Evaluation and Rock Physics Modeling of Broom Creek Deep Saline Aquifer for Geological CO2 Storage." Fuels 5, no. 1 (2024): 53–74. http://dx.doi.org/10.3390/fuels5010004.

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Fossil fuels, such as coal and hydrocarbons, are major drivers of global warming and are primarily responsible for worldwide greenhouse gas emissions, including carbon dioxide CO2. The storage of CO2 in deep saline reservoirs is acknowledged as one of the top practical and promising methods to reduce CO2 emissions and meet climate goals. The North Dakota Industrial Commission (NDIC) recently approved the fourth Class VI permit for a carbon capture and storage project in the Williston basin of North Dakota for the geological CO2 storage in the Broom Creek formation. The current research aimed t

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Afsan, Mohammad, Muhammad Mahbubul Alam, Nushrat Noor, Abul Kalam Mohyammad Yousuf, and MM Ekramul Haque. "Audit of Typical Prescription Format Among the Prescribers of a Garment Medical Centre in Bangladesh." Update Dental College Journal 1, no. 2 (2013): 07–12. http://dx.doi.org/10.3329/updcj.v1i2.13979.

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Objective: To audit the typical prescription or general format according to WHO guidelines for good prescription writing.Materials and methods: A cross-sectional descriptive study was conducted after collecting data from medical records to observe standard of prescriptions and identify factors underlying inappropriate prescription writing.Place and period of study: A total of 300 prescriptions of the patients (garment workers) who had attended in Hannan Textile and Garment Medical Centre, Board Bazar, Dhaka, Bangladesh in between January and November2008 were considered for analysis. Results:

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Pacheva, Iliyana, and Ivan Ivanov. "Targeted Biomedical Treatment for Autism Spectrum Disorders." Current Pharmaceutical Design 25, no. 41 (2020): 4430–53. http://dx.doi.org/10.2174/1381612825666191205091312.

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Background: A diagnosis of autism spectrum disorders (ASD) represents presentations with impairment in communication and behaviour that vary considerably in their clinical manifestations and etiology as well as in their likely pathophysiology. A growing body of data indicates that the deleterious effect of oxidative stress, mitochondrial dysfunction, immune dysregulation and neuroinflammation, as well as their interconnections are important aspects of the pathophysiology of ASD. Glutathione deficiency decreases the mitochondrial protection against oxidants and tumor necrosis factor (TNF)-α; im

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Lee, Hyungjoo, Alexander Mitkus, Andrew Pare та ін. "A New Workﬂow for Estimating Reservoir Properties With Gradient Boosting Model and Joint Inversion Using MWD Measurements". Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 65, № 2 (2024): 215–32. http://dx.doi.org/10.30632/pjv65n2-2024a5.

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Triple-combo logs are important measurements for estimating geological, petrophysical, and geomechanical properties. Unfortunately, wireline and advanced logging-while-drilling (LWD) logs are typically dropped from the formation evaluation plan for unconventional wells due to economic constraints or borehole instability risks. Available measurements are typically measurement-while-drilling (MWD) gamma ray (GR) logs, along with surface measurements such as weight on bit (WOB), rate of penetration (ROP), torque, rotation per minute (RPM), and differential pressure. The development of a robust an

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