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Journal articles on the topic 'Calcium carbonate equivalence'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Erich, M. Susan, and Tsutomu Ohno. "Titrimetric determination of calcium carbonate equivalence of wood ash." Analyst 117, no. 6 (1992): 993. http://dx.doi.org/10.1039/an9921700993.

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2

Pettit, Aaron. "Summary of Calcium Carbonate Equivalence Potential in Various Poultry Litter Types." Journal of Scientific Research and Reports 15, no. 1 (2017): 1–5. http://dx.doi.org/10.9734/jsrr/2017/34557.

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3

Aaron, Pettit. "Summary of Calcium Carbonate Equivalence Potential in Various Poultry Litter Types." Journal of Scientific Research & Reports 15, no. 1 (2017): 1–5. https://doi.org/10.9734/JSRR/2017/34557.

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The lab experiment was to evaluate lime potential of poultry litter being applied to agriculture fields for crop nitrogen and phosphors needs. Poultry litter lime potential was not being consider by farmer, even though soil pH increases were being noted in some fields were litter was applied. The experiment was conducted on poultry litter samples submitted to North Carolina Department of Agriculture (NCDA&CS) Plant/Waste/Solution/Media lab. Samples were divided and waste analysis with CCE% test was conducted from 1/23/2014 to 2/14/2015. Samples were divide into four types (PLB – Boiler, Tu

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4

Park, Suck-Yong, and Sung-Up Choi. "Pharmaceutical Equivalence of Film-Coated and Chewable Tablets: A Comparative Dissolution Study Using Pulverized Chewable Tablets." Pharmaceuticals 17, no. 11 (2024): 1525. http://dx.doi.org/10.3390/ph17111525.

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Famotidine is a histamine H2 receptor antagonist used in the treatment of gastrointestinal disorders. It is available in multiple formulations, including film-coated tablets, chewable tablets, oral suspension, and injections. The purpose of this study was to develop and evaluate the film-coated tablet (FT) containing famotidine, magnesium hydroxide, and precipitated calcium carbonate, designed to be pharmaceutically equivalent to the marketed chewable tablet (CT). To achieve the pharmaceutical equivalence of two tablets, the dissolution profiles of FT should be similar to those of CT. However,

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5

Ohno, Tsutomu, and M. Susan Erich. "Incubation-derived calcium carbonate equivalence of papermill boiler ashes derived from sludge and wood sources." Environmental Pollution 79, no. 2 (1993): 175–80. http://dx.doi.org/10.1016/0269-7491(93)90067-x.

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6

Huang, Jinsheng, Paul R. Fisher, and William R. Argo. "Container Substrate-pH Response to Differing Limestone Type and Particle Size." HortScience 42, no. 5 (2007): 1268–73. http://dx.doi.org/10.21273/hortsci.42.5.1268.

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The objective of this study was to develop reactivity indices to describe the pH response for liming materials incorporated into container substrates. Three reactivity indices [particle size efficiency (PSE), fineness factor (FF), and effective calcium carbonate equivalence (ECC)] were developed based on lime particle size distribution and lime neutralizing value (NV) in CaCO3 equivalent. Six lime particle size fractions (2000 to 850, 850 to 250, 250 to 150, 150 to 75, 75 to 45, and <45 μm) separated from each of three calcitic limes and seven dolomitic limes were used to calibrate PSE, and

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7

Ali, Mujahid, Faisal Mahmood, Christian Magoua Mbeugang, Sunel Kumar, Jiazhen Tang, and Bin Li. "Synthesis of syngas from municipal solid waste in a fluidized bed gasifier." Thermal Science, no. 00 (2024): 83. http://dx.doi.org/10.2298/tsci231109083a.

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In this study, three representative materials, wood, paper, and cloth from municipal solid waste, were studied separately in an atmospheric fluidized bed gasifier. The effects of different feedstock, equivalence ratio, gasification temperature, and calcium carbonate presence on syngas composition, the lower heating value, and carbon conversion efficiency were investigated at different operating temperatures (800-950?C), and the equivalence ratio range from 0.2 and 0.5. As the equivalence ratio increased, the yields of syngas and its lower heating value decreased, whereas the CO2 yield and carb

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8

Huang, Jinsheng, Paul R. Fisher, and William R. Argo. "(70) Improved Reactivity Indices for Horticultural Limes." HortScience 41, no. 4 (2006): 1019A—1019. http://dx.doi.org/10.21273/hortsci.41.4.1019a.

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The objective was to develop indices to describe reactivity of different lime particle size fractions with respect to pH change in horticultural substrates. Particle size efficiency (PSE) was calibrated from pH responses for separated six lime particle size fractions (>850, 850 to 250, 250 to 150, 150 to 75, 75 to 45, and <45 μm) from three calcitic limes, and seven dolomitic limes, based on their increase in substrate pH relative to reagent grade CaCO3 when mixed in a sphagnum peat substrate at 5 g CaCO3 equivalents per liter of peat. The fineness factor (FF) was calculated for a liming

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9

Fisher, Paul R., William R. Argo, and John A. Biernbaum. "Validation of a Fertilizer Potential Acidity Model to Predict the Effects of Water-soluble Fertilizer on Substrate pH." HortScience 49, no. 8 (2014): 1061–66. http://dx.doi.org/10.21273/hortsci.49.8.1061.

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Two experiments were run to validate a “Nitrogen Calcium Carbonate Equivalence (CCE)” model that predicts potential fertilizer basicity or acidity based on nitrogen (N) form and concentration for floriculture crops grown with water-soluble fertilizer in containers with minimal leaching. In one experiment, nine bedding plant species were grown for 28 days in a peat-based substrate using one of three nutrient solutions (FS) composed of three commercially available water-soluble fertilizers that varied in ammonium to nitrate (NH4+:NO3–) ratio (40:60, 25:75, or 4:96) mixed with well water with 130

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10

Kassim, Jabbar K. "Method for Estimation of Calcium Carbonate in Soils from Iraq." International Journal of Environment 1, no. 1 (2013): 9–19. http://dx.doi.org/10.3126/ije.v1i1.8524.

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Attempts have been made to evaluate four methods of quantitative determination of soil carbonates. Calcium carbonates equivalent were determined by the acid neutralization, calcimeter and acetic acid methods. Also, it obtains by the fourth methods when the acid neutralization method is corrected against proton adsorption. The acid neutralization method gave significantly higher estimates of total carbonates and different from each of the others. The calcimeter method gave the lower estimates of CaCO3 equivalent. The results showed that the corrected values of CaCO3 equivalent did not differ si

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11

Yip, Christopher, Philip D. Weyman, Kimberly A. Wemmer, et al. "Quantification of soil inorganic carbon using sulfamic acid and gas chromatography." PLOS One 20, no. 5 (2025): e0320778. https://doi.org/10.1371/journal.pone.0320778.

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Carbon dioxide is the primary greenhouse gas emitted through human activities, and these emissions impact the carbon cycle for hundreds to thousands of years. As carbon dioxide removal strategies to address this challenge continue to be explored and scaled, faster methodologies with high accuracy and precision are required to support the carbon measurements on which these strategies hinge. Of the many available methods to measure soil inorganic carbon, only a select few satisfy all the following criteria: measure inorganic carbon directly, use standardized equipment, perform the measurement au

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12

Yusiharni, B. E., H. Ziadi, and R. J. Gilkes. "A laboratory and glasshouse evaluation of chicken litter ash, wood ash, and iron smelting slag as liming agents and P fertilisers." Soil Research 45, no. 5 (2007): 374. http://dx.doi.org/10.1071/sr06136.

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Standard AOAC methods of chemical analysis have been used to characterise the industrial byproducts partly burnt chicken litter ash (CLA), totally burnt chicken litter ash (CLAT), wood ash (WA), and iron smelting slag, for use as a combined liming agent and phosphate (P) fertiliser. These materials are effective liming agents with calcium carbonate equivalence of 93–99%. Total P concentrations of CLA (3.6% P), CLAT (4.75% P), slag (0.26% P), and WA (0.44% P) indicate that they would function as P fertilisers when applied at the high rates required for liming soils. The form of P in slag is unk

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13

Li, Yujie, Shengjie Rui, Lingling Li, Zhen Guo, and Xingye Sun. "A Substitute for Portland Cement: Experiments on Ecofriendly Reinforcement of Large-Scale Calcareous Sand by Microbial-Induced Carbonate Precipitation Spraying Method." Sustainability 16, no. 1 (2023): 225. http://dx.doi.org/10.3390/su16010225.

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In order to respond to the greenhouse effect and achieve sustainable development, microbial-induced carbonate precipitation (MICP) technology based on the spraying method was used as a substitute for Portland cement to reinforce calcareous sand. In order to simulate the tide and determine the suitable concentration, the effects of the initial water level and cementing solution (CS) concentration on the reinforcement were analyzed. The results showed that the distributions of penetration resistance and equivalent calcium carbonate content mainly include two patterns: monotonically decreasing, a

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14

Moore, T. J., R. H. Loeppert, L. T. West, and C. T. Hallmark. "Routine method for calcium carbonate equivalent of soils." Communications in Soil Science and Plant Analysis 18, no. 3 (1987): 265–77. http://dx.doi.org/10.1080/00103628709367817.

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15

Bushinsky, D. A., B. C. Lam, R. Nespeca, N. E. Sessler, and M. D. Grynpas. "Decreased bone carbonate content in response to metabolic, but not respiratory, acidosis." American Journal of Physiology-Renal Physiology 265, no. 4 (1993): F530—F536. http://dx.doi.org/10.1152/ajprenal.1993.265.4.f530.

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In vitro cultured neonatal mouse calvariae release calcium and buffer the medium proton concentration in response to a decrease in the medium pH caused by a reduction in bicarbonate concentration ([HCO3-]), a model of metabolic acidosis, but not to an equivalent decrease in pH caused by an increase in the partial pressure of carbon dioxide (PCO2), a model of respiratory acidosis. We have postulated that the medium is in equilibrium with the carbonated apatite in bone. To determine whether bone carbonate is depleted during models of acidosis, we cultured calvariae in control medium (pH approxim

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16

Fastovsky, David E., Marisol Montellano-Ballesteros, Henry C. Fricke, et al. "Paleoenvironments, taphonomy, and stable isotopic content of the terrestrial, fossil-vertebrate–bearing sequence of the El Disecado Member, El Gallo Formation, Upper Cretaceous, Baja California, México." Geosphere 16, no. 4 (2020): 991–1011. http://dx.doi.org/10.1130/ges02207.1.

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Abstract The Late Campanian (Late Cretaceous), upper part of the El Disecado Member, El Gallo Formation, Baja California, México, preserves a rich fossil assemblage of microvertebrates and macrovertebrates, silicified logs, macroscopic plant remains, and pollen that was likely deposited as the distal part of a subaerial fan. The unit was episodic and high energy, with its salient features deriving from active river channels and sheet, debris-flow deposits. Landscape stability is indicated by the presence of compound paleosol horizons, containing Fe2O3 mottling in B horizons, cutans, and calciu

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17

King, Helen E., Aleksandar Živković, and Nora H. de Leeuw. "Evaluating the Effect of 18O Incorporation on the Vibrational Spectra of Vaterite and Calcite." Crystals 13, no. 1 (2022): 48. http://dx.doi.org/10.3390/cryst13010048.

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Calcium carbonates are critical in biomineralization processes and as functional materials. For many applications, isotope enrichment in these materials allows researchers to monitor reaction pathways and retrace environmental signatures. When using vibrational spectroscopy, isotopic composition is currently derived by summing the concentration of each isotopologue, assumed to be directly obtainable from the band intensity, divided by the content of the isotope within the different isotopologues (e.g., C16O3, C16O218O, C16O18O2 and C18O3). However, this approach relies on the assumption that e

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18

Wang, Yiqing, Yaohui Xu, Junping Huang, et al. "Experimental Characteristics of Hydrocarbon Generation from Scandinavian Alum Shale Carbonate Nodules: Implications for Hydrocarbon Generation from Majiagou Formation Marine Carbonates in China’s Ordos Basin." Journal of Marine Science and Engineering 11, no. 8 (2023): 1616. http://dx.doi.org/10.3390/jmse11081616.

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The hydrocarbon source rocks of the marine carbonates of the Ordovician Majiagou Formation in the Ordos Basin are generally in the high-overmature stage and are, therefore, not suitable for hydrocarbon thermal simulation experiments. Their hydrocarbon generation potential and hydrocarbon generation characteristics are not clearly understood. Meanwhile, Nordic Cambrian carbonates are similar in lithology, parent material type, and sedimentary age, and are in the low evolution stage, which is suitable for hydrocarbon thermal simulation experiments. Therefore, in this study, we selected the Nordi

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19

Zhao, Yongdong, Berdine R. Martin, and Connie M. Weaver. "Calcium Bioavailability of Calcium Carbonate Fortified Soymilk Is Equivalent to Cow's Milk in Young Women." Journal of Nutrition 135, no. 10 (2005): 2379–82. http://dx.doi.org/10.1093/jn/135.10.2379.

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20

Bristow, Sarah M., Greg D. Gamble, Angela Stewart, et al. "Acute and 3-month effects of microcrystalline hydroxyapatite, calcium citrate and calcium carbonate on serum calcium and markers of bone turnover: a randomised controlled trial in postmenopausal women." British Journal of Nutrition 112, no. 10 (2014): 1611–20. http://dx.doi.org/10.1017/s0007114514002785.

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Ca supplements are used for bone health; however, they have been associated with increased cardiovascular risk, which may relate to their acute effects on serum Ca concentrations. Microcrystalline hydroxyapatite (MCH) could affect serum Ca concentrations less than conventional Ca supplements, but its effects on bone turnover are unclear. In the present study, we compared the acute and 3-month effects of MCH with conventional Ca supplements on concentrations of serum Ca, phosphate, parathyroid hormone and bone turnover markers. We randomised 100 women (mean age 71 years) to 1 g/d of Ca as citra

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21

Baranov, Dmitriy A., Sergey F. Vyaznikovtsev, and Oksana G. Mamaeva. "Clay peptization and clay swelling inhibition in the presence of carbonic acid, bicarbonate and carbonate ions and calcium ions." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 2 (2024): 234–45. http://dx.doi.org/10.18799/24131830/2024/2/3783.

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Relevance. The need to ensure the integrity of the wellbore, composed of clay rocks, and the stability of drilling fluid when drilling in conditions of carbon dioxide and bicarbonate aggression. Aim. To determine experimentally the effect of carbonic acid, bicarbonate and carbonate ions on clay depending on the presence of calcium ions in the dispersion medium. Objects. Water contaminated with carbonic acid, bicarbonate and carbonate ions with different equivalent concentrations of calcium ions. Methods. Inhibitory and peptizing properties of the objects of study in relation to the clay rock w

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22

Chengyuan, Wang, Wang Zhijun, and Cheng Zhijun. "Study on the blast resistance of concrete reinforced with multi-scale hybrid fibers." Journal of Physics: Conference Series 2891, no. 5 (2024): 052018. https://doi.org/10.1088/1742-6596/2891/5/052018.

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Abstract Hybrid fibers can greatly improve the toughness of concrete and enhance the blast resistance of concrete. In this study, nano-sized multi-walled carbon nanotubes, micron-sized calcium carbonate whiskers, and millimeter-sized steel fibers were added to the concrete to improve the cracking resistance of the concrete on a nano-micron-millimeter multi-scale. The blast resistance of multiscale hybrid fiber-reinforced concrete with different TNT equivalents and the volume content of steel fiber were investigated by numerical simulation methods. The results showed that, with the addition of

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23

Gilbert, Marianne, and Pinsupha Petiraksakul. "Stearate Coatings on Particulate Fillers - the Effects on Resulting Compound Properties." Engineering Plastics 5, no. 8 (1997): 147823919700500. http://dx.doi.org/10.1177/147823919700500801.

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Conditions have been established for coating particulate fillers (magnesium hydroxide and calcium carbonate) with metal stearates. The coating process was followed using a quantitative DRIFT (Diffuse Reflectance Fourier Transform Infra Red Spectroscopy) technique. Polyethylene compounds containing 40 weight % filler were produced. Compounds containing stearate coated fillers were found to possess better impact properties than those containing uncoated fillers, or fillers coated with an equivalent level of stearic acid. For the magnesium hydroxide filler, optimum impact properties were obtained

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Gilbert, Marianne, and Pinsupha Petiraksakul. "Stearate Coatings on Particulate Fillers - the Effects on Resulting Compound Properties." Polymers and Polymer Composites 5, no. 8 (1997): 535–39. http://dx.doi.org/10.1177/096739119700500801.

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Conditions have been established for coating particulate fillers (magnesium hydroxide and calcium carbonate) with metal stearates. The coating process was followed using a quantitative DRIFT (Diffuse Reflectance Fourier Transform Infra Red Spectroscopy) technique. Polyethylene compounds containing 40 weight % filler were produced. Compounds containing stearate coated fillers were found to possess better impact properties than those containing uncoated fillers, or fillers coated with an equivalent level of stearic acid. For the magnesium hydroxide filler, optimum impact properties were obtained

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Yan, Han, Xin Shu, Dongliang Zhou, Yong Yang, Lu Chen, and Qianping Ran. "Durability Improvement of Cement Using Amphiphilic Calcium Carbonate Nanoparticles." Coatings 12, no. 10 (2022): 1431. http://dx.doi.org/10.3390/coatings12101431.

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The durability of cementitious materials is significant concerning long-term performance. Nanomaterials are promising candidates for deep refinement of cement durability. Hydrophobic calcium carbonate is a widely applied and easily accessible nanomaterial. However, its hydrophobicity and poor dispersity in water prohibit its direct application in cementitious materials. In this study, hydrophobic calcium carbonate nanoparticles (HbCC) were modified using a novel amphiphilic comb-shaped dispersant that is capable of laurinol release. The modification was conducted to improve the dispersity of H

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Kruger, Marlena C., Brian W. Gallaher, and Linda M. Schollum. "Bioavailability of calcium is equivalent from milk fortified with either calcium carbonate or milk calcium in growing male rats." Nutrition Research 23, no. 9 (2003): 1229–37. http://dx.doi.org/10.1016/s0271-5317(03)00100-3.

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27

McConnaughey, Ted. "Acid secretion, calcification, and photosynthetic carbon concentrating mechanisms." Canadian Journal of Botany 76, no. 6 (1998): 1119–26. http://dx.doi.org/10.1139/b98-066.

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Bicarbonate-based photosynthesis requires equal numbers of proton equivalents. Aquatic plants and photosynthetic symbioses can scavenge protons from ambient solutions, or they can manufacture protons through calcification. Both mechanisms are widely employed. This review examines how aquatic photoautotrophs couple calcification to photosynthesis, and the advantages and limitations of this physiology.Key words: calcification, calcium, carbonate, bicarbonate, photosynthesis, aquatic.

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28

Harmely, Fifi, Henny Lucida, and M. Husni Mukhtar. "Efektifitas Bromelain Kasar dari Batang Nenas (Ananas comosus L. Merr) sebagai Antiplak dalam Pasta Gigi." Scientia : Jurnal Farmasi dan Kesehatan 1, no. 1 (2015): 14. http://dx.doi.org/10.36434/scientia.v1i1.11.

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The effectivity of crude bromelain from pineapple steam as antiplaque has been tested using plaque control record methods. The toothpaste formula was consisted of 5% crude bromelain and 40% abrasive calcium carbonate. The proteolytic activity was 6.584 unit/mg equivalent 98.84 % (F3C). The 5% crude bromelain in toothpaste has antiplaque effectiveness that is not significantly different from control (p <0.05) and significantly different from the formula base (p> 0.05).

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29

Dahl, W. J., A. L. Ford, J. A. Coppola, et al. "Calcium phosphate supplementation increases faecal Lactobacillus spp. in a randomised trial of young adults." Beneficial Microbes 7, no. 1 (2016): 3–10. http://dx.doi.org/10.3920/bm2014.0168.

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The aim of the studies was to determine the effects of calcium carbonate and calcium phosphate supplementation on faecal Lactobacillus spp., with and without a probiotic supplement, in healthy adults. Study 1 comprised of a randomised, double-blind, crossover design; participants (n=15) received 2 capsules/d of 250 mg elemental calcium as calcium carbonate (Ca1) and calcium phosphate (Ca2) each for 2-week periods, with 2-week baseline and washout periods. Study 2 was a randomised, double-blind, crossover design; participants (n=17) received 2 capsules/d of Lactobacillus helveticus R0052 and La

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30

Yanushevska, Olena. "THE EFFECT OF THE TYPE AND CONTENT OF CARBONATES ON THE CHARACTERISTICS OF POROSITY OF CERAMIC MEMBRANES." WATER AND WATER PURIFICATION TECHNOLOGIES. SCIENTIFIC AND TECHNICAL NEWS 35, no. 1 (2023): 46–55. http://dx.doi.org/10.20535/2218-930012023275757.

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The main issue considered in the work is the creation of a matrix for ceramic membranes, which would be distinguished by low cost and high porosity. In order to reduce the cost of ceramic membranes, a widespread approach was chosen, which is powerfully used by many researchers, namely the use of natural minerals - kaolin and saponite - as the main components of the matrix. Carbonates were used as pore generating agents to achieve the required porosity value. Three series of ceramic membranes (CM) differing in chemical composition were synthesized in the work: KP1, KP2, and KP3 series. The main

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Poulsen, L., and M. J. Dudas. "Attenuation of cadmium, fluoride and uranium in phosphogypsum process water by calcareous soil." Canadian Journal of Soil Science 78, no. 2 (1998): 351–57. http://dx.doi.org/10.4141/s97-004.

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Concerns about contaminant migration from phosphogypsum (PG) repositories prompted the present study. A sequential batch procedure, in which acidic process water (PW) from a phosphate fertilizer plant was reacted with samples of a calcareous till, was employed to determine the attenuation of environmentally sensitive elements by reaction with typical subsoils at PG waste repositories. PW leachates were monitored for total soluble fluoride (F) and pH during the experiment. Soil samples were analyzed for pH, F, cadmium (Cd), uranium (U), and calcium carbonate (CaCO3) equivalent at the end of the

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Ferreira Menezes, Williane, Emilene Rodrigues Souza, Rodrigo Sá Fortes Pedreira, et al. "CALCIUM AND MAGNESIUM SILICATE AND SOIL AS ENVIRONMENTAL STABILIZERS IN THE CULTIVATION OF NILE TILAPIA LARVAE IN THE RECIRCULATION SYSTEM." Acta Biologica Brasiliensia 7, no. 2 (2024): 130–50. https://doi.org/10.18554/acbiobras.v7i2.7994.

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With the intensification of production systems and the need to reduce water use, there is a greater likelihood of sudden changes in water quality, leading to fish mortality. Therefore, it is necessary to develop techniques that increase environmental homeostasis. This experiment evaluated the influence of calcium-magnesium silicate and soil compared to calcium carbonate and calcium-magnesium carbonate, traditional alkalizers, as environmental stabilizers in cultivating Nile tilapia larvae in a recirculating system. The experiment was composed of five treatments: Control) aquarium containing on

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Heckman, J. R., G. C. Pavlis, and W. L. Anastasia. "Lime Requirement for New Jersey Blueberry-producing Soils." HortTechnology 12, no. 2 (2002): 220–22. http://dx.doi.org/10.21273/horttech.12.2.220.

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In New Jersey, the major soil series (Sassafras, Pocomoke, Berryland, Atsion, and Downer) used for blueberry (Vaccinium corymbosum L.) production often have soil pH levels much lower than the soil pH range of 4.0 to 5.2 that is considered satisfactory for blueberry. The lime requirements for these soils to achieve a target soil pH of 4.8 has not been established. Soils with current soil pH levels in the range of 3.3 to 3.9 were collected from eight New Jersey sites used for blueberry production. The soils were treated with various application rates of calcium carbonate (CaCO3) and incubated in

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Lertwattanaruk, Pusit, and Natt Makul. "Influence of Ground Calcium Carbonate Waste on the Properties of Green Self-Consolidating Concrete Prepared by Low-Quality Bagasse Ash and Rice Husk Ash." Materials 14, no. 15 (2021): 4232. http://dx.doi.org/10.3390/ma14154232.

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Bagasse ash (BA) and rice husk ash (RHA) are by-products from electricity power plants. Ground calcium carbonate waste (GCW) is the by-product of the mining of calcium carbonate (CaCO3) in the color pigment manufacturing industry. Both BA and RHA are classified as low-quality pozzolanic materials, differing from GCW, which contains a high calcium oxide (CaO) content that leads to products equivalent to the hydration reaction. Therefore, GCW is likely able to improve the properties of self-consolidating concrete (SCC) incorporating BA and RHA. This paper discusses the production of green self-c

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Frenkel, Val S., Alexey G. Pervov, Alexey P. Andrianov, and Vladimir A. Golovesov. "Investigation of antiscalant dosing influence on scaling process in reverse osmosis facilities and membrane surface adsorption." Vestnik MGSU, no. 6 (June 2019): 722–33. http://dx.doi.org/10.22227/1997-0935.2019.6.722-733.

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Introduction. Understanding of crystal growth mechanism enables to develop efficient tools to control scaling and improve the process of treatment using membranes and increasing the amount of filtrate output. This investigation is aimed at studying an antiscalant behaviour in reverse osmosis (RO) process when treating ground water. Experimental dependences of calcium carbonate scaling efficiency on antiscalant dosage were found. Rates of adsorption on crystal surface of scaling deposit and on membrane surfaces were compared. Dependences of rates of inhibitor adsorption on crystal surface versu

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Kuhnt, Wolfgang. "Deep-water agglutinated foraminifera from the Lower Cretaceous (Neocomian) ‘Complex à Aptychus’ Formation (Corridor de Boyar, Betic Cordillera, southern Spain)." Journal of Micropalaeontology 14, no. 1 (1995): 37–52. http://dx.doi.org/10.1144/jm.14.1.37.

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Abstract. The oldest deep-water sediments of the flysch units in the western part of the Betic Cordillera (southern Spain) arc red and green pelagic claystones with intercalated siliciclastic and carbonate turbidites, ranging from Berriasian to Barremian in age. Autochthonous and redeposited benthic foraminiferal assemblages were studied in outcrops of this ‘Complex à Aptychus’ Formation in the ‘Corridor de Boyar’ near Grazalema. The assemblage of the autochthonous red and green claystones is wholly comprised of agglutinated forms, reflecting deposition beneath the calcium carbonate compensati

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Vasoya, Ankur, Sunil Kumar Shah, C. K. Tyagi, Prabhakar Budholiya, and Harish Pandey. "Formulation, Development and Evaluation of Chewable Bi-layered Tablets for Treating Gastro Esophageal Reflux Disease." Journal of Drug Delivery and Therapeutics 10, no. 4-s (2020): 92–99. http://dx.doi.org/10.22270/jddt.v10i4-s.4224.

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The purpose of this research work was to formulate raft-forming chewable bilayer tablets of sodium alginate using a raft-forming agent along with gas-generating agents. Tablets were prepared by wet granulation and evaluated for raft strength, acid neutralization capacity, weight variation, % drug content, thickness, hardness, friability and in vitro drug release. Various raft-forming agents were used in preliminary screening. The amount of sodium alginate, amount of calcium carbonate and amount sodium bicarbonate were selected as variables. Raft strength, acid neutralization capacity and drug

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Joshi, Shailesh, P. K. Ajikumar, K. Sivasubramanian, and V. Jayaraman. "Synthesis, characterization and low energy photon attenuation studies of bone tissue substitutes." Journal of Polymer Engineering 40, no. 2 (2020): 99–108. http://dx.doi.org/10.1515/polyeng-2019-0179.

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AbstractEpoxy composites with different weight percentages of calcium carbonate and calcium phosphate were synthesized as bone tissue substitutes (BTS) for internal dosimetry. The Fourier-transform infrared spectroscopy analysis confirmed that no chemical reaction occurred between the polymer and the fillers. Thermogravimetric analysis also showed improvement in the thermal properties of the composites due to the fillers. The uniform distribution of fillers in the epoxy matrix was established by X-ray radiography. The attenuation behavior of BTS was probed for low energy γ source 241Am (59.5 k

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Yeo, Shih Horng, Kim Hung Mo, and Hilmi Bin Mahmud. "Hybrid Nucleation Acceleration Method with Calcium Carbonate and Calcium Silicate Hydrate for Fast-Track Construction." Buildings 13, no. 12 (2023): 2975. http://dx.doi.org/10.3390/buildings13122975.

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This research focuses on achieving early strength of cement-based materials through the hybrid nucleation acceleration method. Through the study of various mortar mixtures, which incorporate components such as ordinary Portland cement (OPC), fine limestone powder (with a particle size of d50: 1 μm), coarse limestone powder (with a particle size of d50: 12 μm), calcium silicate hydrate (C-S-H) nucleation seeding agent, and calcium nitrate (CN), the effect of the hybrid nucleation acceleration method was investigated. When OPC was substituted with 20% fine limestone powder, a strength of 13.5 MP

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Buranaamnuay, Kakanang, A. Kettawan, C. Changsangfa, and S. Aiemongkot. "Effect of Chicken Bone Extract Powder on Epididymal Sperm Quality of Male Wistar Rats." Jurnal Ilmu Ternak dan Veteriner 26, no. 2 (2021): 74. http://dx.doi.org/10.14334/jitv.v26i2.2729.

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Calcium is one of the minerals that are essential for male reproductive function. Calcium deficiency adversely affects spermatogenesis, normal sperm function and results in infertility. The sperm quality of rats fed a standard diet containing chicken bone extract powder (BEP) was assessed in the present study. Twenty male 8-week-old rats, Wistar strain, were randomized by weight into two groups of ten rats each and fed ad libitum a standard diet containing calcium carbonate (CaCO<sub>3</sub>, control) or chicken BEP; both were equivalent to 0.5% calcium. At the end of the 7-week co

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Lennie, A. R. "Ikaite (CaCO3.6H2O) compressibility at high water pressure: a synchrotron X-ray diffraction study." Mineralogical Magazine 69, no. 3 (2005): 325–35. http://dx.doi.org/10.1180/0026461056930254.

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AbstractIkaite (CaCO3.6H2O), which forms in cold carbonate-rich marine environments, also crystallizes from calcite under aqueous conditions above ∼0.5 GPa at room temperature. Using synchrotron X-ray powder diffraction, measurements have been made of pressure-induced changes in unit-cell dimensions of ikaite contained in a diamond anvil cell. Ikaite shows anisotropic compressibility along the crystallographic axes in the order a > c > b up to 4 GPa. Comparison with other phases shows the relative volume compressibility of ikaite to be greater than that of gypsum (CaSO4.2H2O), calcite an

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Yeh, Tsu-Te, Chun-Kai Chen, Yaswanth Kuthati, Lokesh Kumar Mende, Chih-Shung Wong, and Zwe-Ling Kong. "Amorphous Calcium Carbonate Enhances Fracture Healing in a Rat Fracture Model." Nutrients 16, no. 23 (2024): 4089. http://dx.doi.org/10.3390/nu16234089.

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Background: Delayed and failed fracture repair and bone healing remain significant public health issues. Dietary supplements serve as a safe, inexpensive, and non-surgical means to aid in different stages of fracture repair. Studies have shown that amorphous calcium carbonate (ACC) is absorbed 2 to 4.6 times more than crystalline calcium carbonate in humans. Objectives: In the present study, we assessed the efficacy of ACC on femoral fracture healing in a male Wistar rat model. Methods: Eighty male Wistar rats were randomly divided into five groups (n = six per group): sham, fracture + water,

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Jung, Hundal, Tae Ahn, Roberto Pabalan, and David Pickett. "Corrosion Study of SIMFUEL in Aerated Carbonate Solution Containing Calcium and Silicate." MRS Proceedings 1518 (2013): 139–44. http://dx.doi.org/10.1557/opl.2013.77.

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ABSTRACTThe corrosion behavior of simulated spent nuclear fuel (SIMFUEL) was investigated using electrochemical impedance spectroscopy and solution chemistry analyses. The SIMFUEL was exposed to aerated solutions of NaCl+NaHCO3 with and without calcium (Ca) and silicate. Two SIMFUEL compositions were studied, representing spent nuclear fuel (SNF) corresponding to 3 or 6 at % burnup in terms of fission product equivalents of surrogate elements. For all tested cases, the polarization resistance increased with increased immersion time, indicating possible blocking effects due to accumulation of c

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Walia, Maninder K., and Warren A. Dick. "Gypsum and carbon amendments influence carbon fractions in two soils in Ohio, USA." PLOS ONE 18, no. 4 (2023): e0283722. http://dx.doi.org/10.1371/journal.pone.0283722.

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Carbon sequestration as influenced by management practices such as soil amendments is not yet fully understood. Gypsum and crop residues can improve soil properties, but few studies have focused on their combined effect on soil C fractions. The objective of this greenhouse study was to determine how treatments affected different forms of C, i.e., total C, permanganate oxidizable C (POXC), and inorganic C in 5 soil layers (0–2, 2–4, 4–10, 10–25, and 25–40 cm). Treatments were glucose (4.5 Mg ha-1), crop residues (13.4 Mg ha-1), gypsum (26.9 Mg ha-1) and an untreated control. Treatments were app

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Seo, Yung, Dong Kang, and Jung Han. "Utilization of Calcium Carbonate-Coated Wood Flour in Printing Paper and Their Conservational Properties." Sustainability 11, no. 7 (2019): 1867. http://dx.doi.org/10.3390/su11071867.

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Wood flours (WFs) are bulky lignocellulosic materials that can increase the bulk and stiffness of paper. To be used in printing paper for replacing chemical pulp, WFs were first fractionated by a 200-mesh screen to improve smoothness; second, they were coated with calcium carbonate by an in-situ CaCO3 formation method (coated wood flours, CWFs) to improve brightness. The performance of CWFs for printing paper was compared to those of bleached wood flours (BWFs) and bleached chemical pulp. Equivalent brightness and much higher smoothness were obtained for the CWFs compared to the BWFs. Furtherm

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Morugán-Coronado, A., F. García-Orenes, and A. Cerdà. "Effect of land management on soil properties in flood irrigated citrus orchards in Eastern Spain." SOIL Discussions 2, no. 1 (2015): 1–27. http://dx.doi.org/10.5194/soild-2-1-2015.

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Abstract. Agricultural land management greatly affects soil properties. Microbial soil communities are the most sensitive and rapid indicators of perturbations in land use and soil enzyme activities are sensitive biological indicators of the effects of soil management practices. Citrus orchards frequently have degraded soils and this paper evaluates how land management in citrus orchards can improve soil quality. A field experiment was performed in an orchard of orange trees (Citrus Sinensis) in the Alcoleja Experimental Station (Eastern Spain) with clay-loam agricultural soils to assess the l

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Zeitouny, Jude, Wolfgang Lieske, Arash Alimardani Lavasan, Eva Heinz, Marc Wichern, and Torsten Wichtmann. "Impact of New Combined Treatment Method on the Mechanical Properties and Microstructure of MICP-Improved Sand." Geotechnics 3, no. 3 (2023): 661–85. http://dx.doi.org/10.3390/geotechnics3030036.

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Microbially induced calcite precipitation (MICP) is a green bio-inspired soil solidification technique that depends on the ability of urease-producing bacteria to form calcium carbonate that bonds soil grains and, consequently, improves soil mechanical properties. Meanwhile, different treatment methods have been adopted to tackle the key challenges in achieving effective MICP treatment. This paper proposes the combined method as a new MICP treatment approach, aiming to develop the efficiency of MICP treatment methods and simulate naturally cemented soil. This method combines the premixing, per

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Hogan, JP, LJ Cook, and P. Davis. "The nutritional value of rice pollard for sheep." Australian Journal of Agricultural Research 39, no. 3 (1988): 525. http://dx.doi.org/10.1071/ar9880525.

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An investigation has been made of the nutritional value for lambs of diets containing rice pollard from which varying amounts of oil were extracted. The preparations were pelleted with equal amounts of wheaten hay to provide diets containing per kg, 12, 56, 80 and 107 g oil. A fifth diet was also prepared containing 106 g oil, and an additional 2.5 g calcium carbonate/kg. The diets were offered ad libitum to 46 crossbred lambs for 83 days, body weight changes being recorded over the final 53 days. Digestion in the stomach and intestines of similar lambs with fistulae in the rumen and abomasum

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Ertem, G., M. C. Ertem, C. P. McKay, and R. M. Hazen. "Shielding biomolecules from effects of radiation by Mars analogue minerals and soils." International Journal of Astrobiology 16, no. 3 (2016): 280–85. http://dx.doi.org/10.1017/s1473550416000331.

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AbstractOrganic compounds have been delivered over time to Mars via meteorites, comets and interplanetary dust particles. The fate of organic material on the surface of Mars must be affected by the Martian environment, in particular by ultraviolet (UV) and other ionizing radiation. Penetration depth of UV radiation into soils is in the sub-millimetre to millimetre range and depends on the properties of the soil. The aim of this research is to study the possible protective role of Martian analogue minerals and soils for survivability of biomolecules against UV radiation and to compare their dec

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Oettinger, C. W., J. C. Oliver, and E. J. Macon. "The effects of calcium carbonate as the sole phosphate binder in combination with low calcium dialysate and calcitriol therapy in chronic hemodialysis patients." Journal of the American Society of Nephrology 3, no. 4 (1992): 995–1001. http://dx.doi.org/10.1681/asn.v34995.

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Alternative phosphate binders, such as CaCO3, have been shown to be effective in the control of phosphate (P) retention in hemodialysis patients (HDP). Additionally, both oral (POC) and iv (IVC) calcitriol are purported to be of benefit in the control of secondary hyperparathyroidism. This investigation was undertaken to determine: (1) the effectiveness of CaCO3 as the sole P binder in combination with low (2.5 mEq/L) Ca dialysate; (2) the effects of discontinuing Al(OH)3 binders on both unstimulated and stimulated Al concentrations; and (3) the comparative parathyroid hormone (PTH) response t

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