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Relevant bibliographies by topics / Calcium sources

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Academic literature on the topic 'Calcium sources'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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Journal articles on the topic "Calcium sources"

1

Fenster, Diane Lind. "Alternative Sources of Calcium." Archives of Pediatrics & Adolescent Medicine 148, no. 6 (June 1, 1994): 660. http://dx.doi.org/10.1001/archpedi.1994.02170060114026.

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Gorshunov, N. M., D. A. Dolgolenko, Yu A. Muromkin, E. P. Potanin, and A. L. Ustinov. "ECR sources of calcium plasma." Instruments and Experimental Techniques 54, no. 1 (January 2011): 97–103. http://dx.doi.org/10.1134/s0020441211010155.

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Lee, Su A., L. Vanessa Lagos, Carrie L. Walk, and Hans H. Stein. "Standardized total tract digestibility of calcium varies among sources of calcium carbonate, but not among sources of dicalcium phosphate, but microbial phytase increases calcium digestibility in calcium carbonate1." Journal of Animal Science 97, no. 8 (May 20, 2019): 3440–50. http://dx.doi.org/10.1093/jas/skz176.

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Abstract Two experiments were conducted to test the hypothesis that standardized total tract digestibility (STTD) of Ca and the response to microbial phytase is constant among different sources of Ca carbonate and that the STTD of Ca is constant among different sources of dicalcium phosphate (DCP) when fed to growing pigs. In Exp. 1, 80 pigs (initial BW: 19.0 ± 1.9 kg) were randomly allotted to 10 diets and 2 blocks with 4 pigs per diet in each block. Four sources of Ca carbonate were used, and each source was included in a diet without microbial phytase and a diet with microbial phytase (500 units/kg diet). Two Ca-free diets without or with microbial phytase were also formulated. Feed allowance was 2.7 times the maintenance energy requirement for ME and daily feed allotments were divided into 2 equal meals. The initial 4 d of each period were considered the adaptation period to the diets followed by 4 d of fecal collection using the marker-to-marker procedure. Pigs fed diets containing exogenous phytase had lower (P < 0.05) basal endogenous loss of Ca compared with pigs fed diets containing no phytase. There were no interactions between phytase and source of Ca carbonate. Values for STTD of Ca were greater (P < 0.05) for diets containing microbial phytase (77.3% to 85.4%) compared with diets without exogenous phytase (70.6% to 75.2%), and values for STTD of Ca differed (P < 0.05) among the 4 sources of Ca carbonate. In Exp. 2, 40 pigs (initial BW: 14.9 ± 1.3 kg) were allotted to a completely randomized design with 5 diets and 8 replicate pigs per diet. A basal diet in which all Ca was supplied by Ca carbonate was formulated. Three diets were formulated by adding 3 sources of DCP to the basal diet and a Ca-free diet was also used. Feeding and collection methods were as described for Exp. 1. Results indicated that values for STTD of Ca and ATTD of P were not different among diets, indicating that under the conditions of this experiment, the digestibility of Ca and P in DCP appears to be constant regardless of origin of DCP. In conclusion, use of microbial phytase reduces the basal endogenous loss of Ca and increases Ca digestibility in Ca carbonate. The STTD of Ca varies among sources of Ca carbonate, regardless of phytase inclusion, but that appears not to be the case for the STTD of Ca in different sources of DCP.

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Lee, Su A., Carrie L. Walk, and Hans H. Stein. "PSIII-18 Standardized total tract digestibility of Ca by growing pigs in different sources of calcium carbonate and dicalcium phosphate." Journal of Animal Science 97, Supplement_2 (July 2019): 173–74. http://dx.doi.org/10.1093/jas/skz122.307.

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Abstract The objective was to test the hypothesis that standardized total tract digestibility (STTD) of Ca and the response to microbial phytase is constant among different sources of calcium carbonate and different sources of dicalcium phosphate (DCP). In Exp. 1, 80 pigs (19.0 ± 1.9 kg) were placed in metabolism crates and randomly allotted to 10 diets. Four calcium carbonate-containing diets and a Ca-free diet were formulated without or with microbial phytase (500 units/kg diet). Feces were collected for 4 d after a 5 d adaptation period. Data were analyzed using a model that included calcium carbonate source, phytase, and the interaction between source and phytase as fixed effects and replicate as random effect. There were no interactions between phytase and source. The basal endogenous loss (BEL) of Ca from pigs fed phytase was less (P = 0.037) than from pigs fed no phytase. Values for STTD of Ca in calcium carbonate differed (P < 0.05) among the 4 sources, but increased (P < 0.05) if phytase was used (Table 1). In Exp. 2, 40 pigs (14.9 ± 1.3 kg) were allotted to a basal diet where all Ca was supplied by calcium carbonate, 3 diets containing calcium carbonate and DCP, and a Ca-free diet. Pigs were placed in metabolism crates and feces were collected as in Exp. 1. Data were analyzed using a model that included DCP-source as fixed effect and replicate as random effect. Results indicated that the STTD of Ca in DCP was not different among sources. In conclusion, use of microbial phytase reduces the BEL of Ca and increases Ca digestibility in calcium carbonate, but the STTD of Ca varies among sources of calcium carbonate. However, no difference in STTD of Ca among sources of DCP were observed.

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Ranhotra, G. S., J. A. Gelroth, S. D. Leinen, and F. E. Schneller. "Bioavailability of Calcium in Breads Fortified with Different Calcium Sources." Cereal Chemistry Journal 74, no. 4 (July 1997): 361–63. http://dx.doi.org/10.1094/cchem.1997.74.4.361.

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Diana, Thiago Ferreira, Arele Arlindo Calderano, Fernando de Castro Tavernari, Horácio Santiago Rostagno, Alexandre de Oliveira Teixeira, and Luiz Fernando Teixeira Albino. "Age and Calcium Sources in Laying Hen Feed Affect Calcium Digestibility." Open Journal of Animal Sciences 11, no. 03 (2021): 501–13. http://dx.doi.org/10.4236/ojas.2021.113034.

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Leelatawonchai, Panu, and Teerawat Laonapakul. "Preparation and Characterization of Calcium Sources from Golden Apple Snail Shell for Naturally Based Biomaterials." Advanced Materials Research 931-932 (May 2014): 370–74. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.370.

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The use of biogenic materials to produce naturally based biomaterials has been widely studied. In this study, heavy metal content, phase transformation and physical characterization of Golden Apple Snail shell were investigated for use as a calcium source in the production of naturally based biomaterials. In order to investigate phase transformation, Golden Apple Snail shell was calcined at 600 °C, 700 °C, 800 °C and 900 °C. Small amounts of As and Pb were found in raw Golden Apple Snail shell. Calcium carbonate (CaCO3, calcite) and calcium oxide (CaO) phases were observed in Golden Apple Snail shells after calcination at 600 °C and 800 °C. Fine white CaCO3 (calcite) and CaO powders were prepared after calcination of Golden Apple Snail shells. The CaCO3 (calcite phase) was completely transformed into a CaO phase at 800 °C. Phase transformation depended on calcination temperature and time.

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Graveland, J. "Avian eggshell formation in calcium-rich and calcium-poor habitats: importance of snail shells and anthropogenic calcium sources." Canadian Journal of Zoology 74, no. 6 (June 1, 1996): 1035–44. http://dx.doi.org/10.1139/z96-115.

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Most passerines depend on the intake of calcium-rich material in addition to their normal food for proper eggshell formation and skeletal growth. A large proportion of Great Tits (Parus major) in forests on nutrient-poor soils in the Netherlands produce eggs with defective shells as a result of calcium deficiency. Eggshell defects are much scarcer near human settlements and do not occur on nutrient-rich soils. I investigated this variation in eggshell quality by examining the use of calcium-rich material by the birds. The results show that calcium-rich items in nest material and droppings can be used as a measure of calcium consumption. Snail shells were the main calcium source in forests where eggshell defects did not occur. In forests where the tits exhibited calcium deficiency, snail shells were rarely taken and birds used anthropogenic calcium sources such as chicken grit and chicken eggshells. It was demonstrated that the dependence on snail shells and the use of alternatives such as anthropogenic calcium sources in areas where snails are scarce are general features of calcium intake among birds. Thus, calcium limitation may be a common phenomenon in avian reproduction on poor soils in countries less populous than the Netherlands.

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Serra, Maria Rosaria, Annarita Caldara, Maurizio Marra, Giuseppe Zacchia, Lisa Di Franco, Eufemia Silvestri, Franco Contaldo, Fabrizio Pasanisi, and Lidia Santarpia. "Dietary calcium sources in disease-specific diets." Nutritional Therapy & Metabolism 32, no. 2 (2014): 93–97. http://dx.doi.org/10.5301/ntm.2014.12382.

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Garcia-Lopez, S., and Gregory D. Miller. "Bioavailability of calcium from four different sources." Nutrition Research 11, no. 10 (October 1991): 1187–96. http://dx.doi.org/10.1016/s0271-5317(05)80696-7.

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Dissertations / Theses on the topic "Calcium sources"

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Masters, Jonathan Grenville. "Sources of calcium involved in detrusor smooth muscle contraction." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312030.

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Madrick, Tracy L. "The availability of calcium from various commercial sources of calcium carbonate and fortified food products." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/53228.

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Although the therapeutic benefits of calcium supplementation have yet to be fully determined, popular literature has promoted this practice to combat osteoporosis. This study examined the potential bioavailability of calcium from various supplement and antacid forms. Four dosage levels were studied for each of five sources, including leading supplements Caltrate and Os-Cal, two "calcium rich" antacids, Tums and Rolaids, and a calcium carbonate control. These samples were subjected to four gastric treatments in an in vitro digestion procedure designed to observe the influence of acid secretion on calcium solubility. Depending on the degree of acidity of these solutions, solubility behavior of CaCO3 was highly variable. Normal and reduced acid treatments adequately solubilized between 85 and 88% of the total calcium, whereas negligible quantities were dissolved in deionized water or the achlorhydric solution. Relative availability of calcium from the various sources differed according to gastric treatment. Tums, Caltrate and Os-Cal had dissolution rates that were similar to reagent grade CaCO3. Rolaids provided a significantly lower amount of soluble calcium under all of the experimental conditions (P < 0.001). Amounts of available calcium increased with increasing dosages. The effectiveness of fortification techniques used to increase the calcium content of various food systems was also examined. Fortified orange juice and yogurt samples were found to contain a quantity of available calcium comparable to that found in milk. It was concluded that both of these approaches are reasonable for increasing calcium intakes in individuals with normal gastric secretion.
Master of Science

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Lewis, Cris Lee. "Characterization and applications of pulsed millisecond glow discharge sources." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1531.

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Thesis (Ph. D.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains xv, 161 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 153-157).

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Chen, Ching-Chih. "Use of foliar calcium to strontium ratios to partition soil calcium sources of American beech on two sites in Southern Québec." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103732.

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Forest ecosystems in southern Quebec have been exposed to high levels of atmospheric acid deposition for many decades. American beech (Fagus grandifolia Ehrh.), an acid-tolerant species, is increasing in abundance in the sugar maple (Acer saccharum Marsh.) dominated forest of southern Quebec. I therefore hypothesized that beech is better adapted than sugar maple to access the soil Ca in these forests. In my thesis, I partitioned the source of soil Ca by horizon/depth for beech foliage at two sites of contrasting soil fertility using a Ca/Sr approach. The discrimination of Ca over Sr by beech was determined by sampling seedlings and their extended rhizosphere (n = 40) on sites with large differences in Ca and Sr supply, as well as Ca/Sr ratios. With the discrimination function determined (R2=0.5, p<0.05), a study was conducted to determine if leaf Ca/Sr was independent of the height of sampling. Trees were sampled at three different heights (3, 6, and 13 m). Leaf Ca/Sr was found to be independent of the height of sampling in both sugar maple and beech (p = 0.67). Mature beech trees were sampled on a poor sandy ridge in the Morgan Arboretum (n = 22) and in the Hermine watershed in the Lower Laurentians (n =18). At both sites, soils were acidic with decreasing fertility with depth and low Ca/Al ratios. Beech was found to take up soil Ca primarily from the F horizon on both sites (> 60%) and the contribution from deeper soil horizons generally decreased with depth. The more superficial uptake of Ca by beech compared to sugar maple could provide it with a competitive advantage in terms of nutrition which could explain in part its increasing dominance in the Quebec landscape.
La forêt du sud du Québec reçoit depuis plusieurs décennies des niveaux de déposition acide élevés. Le hêtre d'Amérique (Fagus grandifolia Ehrh.), une espèce adapté aux conditions de sol acide, a gagné en abondance dans la forêt du sud du Québec qui est dominé par l'érable à sucre (Acer saccharum Marsh.). J'ai donc émis l'hypothèse que le hêtre est mieux adapté que l'érable à sucre pour accéder au Ca du sol dans ces forêts. Dans ma thèse, j'ai partitionné la source de Ca du sol des feuilles du hêtre par horizon/profondeur à deux stations de fertilité différente au moyen de l'approche des ratios de Ca/Sr. La discrimination entre le Ca et le Sr par le hêtre a été déterminé en échantillonnant des semis avec leur rhizosphère (n = 40) sur des stations présentant des niveaux de Ca, Sr et Ca/Sr très différents. Une fois la fonction de discrimination établie (R2=0.5, p<0.05), une étude a été faite pour déterminer si les ratios de Ca/Sr dans les feuilles variaient avec la hauteur d'échantillonnage. Les arbres ont été échantillonnés à trois hauteurs (3, 6 et 13 m). Les ratios de Ca/Sr des feuilles s'est avéré indépendant de la hauteur d'échantillonnage chez l'érable à sucre et le hêtre (p = 0.67). Des hêtres matures ont ensuite été échantillonnés sur un sol sableux de l'Arboretum Morgan (n = 22) et dans le bassin de l'Hermine dans les Laurentides (n = 18). Les sols étaient acides avec des ratios Ca/Al bas aux deux stations et leur fertilité décroissait avec la profondeur. La source première de Ca pour les feuilles de hêtre est l'horizon F aux deux stations (> 60%) et la contribution des horizons plus profonds décroîent généralement avec la profondeur. L'absorption moins en profondeur du Ca du sol par le hêtre par rapport à l'érable à sucre pourrait être n avantage en terme de nutrition, ce qui pourrait expliquer en partie sa plus grande abondance dans les forêts du sud du Québec.

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Ahmed, Tanveer. "A detailed investigation into the production of calcium alginate fibre from various algal sources." Thesis, University of South Wales, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395313.

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Wladecki, Hannah Victoria. "Evaluation of Particle Size Differences, Calcium Sources, and Phytases on Ph and Calcium and Phosphorus Solubility in an in Vitro Simulation of Broiler Digestion." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/35303.

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Broiler nutrition can be affected by many different factors, and diets can be made up of a wide variety of components. Feed enzymes, different Ca sources, and various ingredient particle sizes all contribute to broiler nutritional status and need to be investigated to determine their full effects on the bird. The objective of the first study was to evaluate various Ca sources and microbial phytases using an in vitro assay to simulate broiler digestion. The trial measured total Ca and P, soluble Ca and P, and pH. It involved limestone, dicalcium phosphate, highly soluble Ca (HSC), whey, and a control with no added Ca. Each diet was supplemented with 0 or 500 FTU/kg of phytase 1 or phytase 2. Diets were analyzed for total Ca and P and then were subjected to a gastric phase digestion, including the addition of HCl and pepsin, with incubation times of 5, 10, or 20 min. They were also subjected to a gastric phase and a SI phase digestion, including the addition of HCl, pepsin, NaHCO3, and pancreatin with incubation times of 5, 10, 20, or 60 min. The objective of the second study was to evaluate various particle sizes, Ca sources, and source locations using the same in vitro assay. Large, medium, and fine particle sizes, as well as limestone from 4 different locations and HSC were subjected to the same assays and conditions as in the first trial. These studies suggest that HSC is a highly soluble Ca source, phytase improves P solubility in vitro, fine particle size is more soluble than large particle size in vitro, and location from which the Ca source is obtained can affect Ca and P solubility. The in vitro assay utilized in this study is a fast and cost efficient technique for evaluating and comparing parameters of broiler diets to make recommendations for commercial poultry nutrition.
Master of Science

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Browne, Jessica, Nathan Lunt, and Julie Zappia. "Benefits and Sources of Calcium & Vitamin D: A Cross-Sectional Questionnaire Assessing Patient Knowledge and Contributing Factors." The University of Arizona, 2017. http://hdl.handle.net/10150/624162.

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Class of 2017 Abstract
Objectives: To assess the general public’s knowledge of the benefits and sources of calcium and vitamin D dietary and supplemental intake and to identify any pertinent demographic characteristics that influence such knowledge. Methods: Participants were convenience sampled from Walmart locations in Safford, Arizona and Tucson, Arizona. Each participant completed a brief survey assessing their knowledge about the benefits and sources of calcium and vitamin D and optional questions regarding demographics. Results: 51 participants in Safford and 51 participants in Tucson completed the questionnaire. Of the 51 responders in Safford, 18 were men and 24 were women with a mean age of 49.52 (SD = 14.53, 80.49% white). Of the 51 responders in Tucson, 22 were men and 17 were women with a mean age of 50.97 (SD = 17.32, 71.79% white). Baseline demographics were equivalent. Statistical significant was observed when the mean total scores from Tucson and Safford were compared. On average, the participants in Tucson scored higher when compared to participants in Safford with mean scores of 55.5% and 49.0% respectively (p= 0.0412). Conclusions: Tucson participants scored statistically significantly higher when compared to Safford participants. This may be due to the health disparity between urban and rural populations. Gender, ethnicity, supplement use, personal or family history of osteoporosis, and education level did not appear to affect response scores on the questionnaire.

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Jafari, Abbas. "The Effect of Citric Acid on Amorphous Calcium Carbonate, Mesoporous Magnesium Carbonate and Calcium Magnesium Composite : A brief study." Thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-435989.

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During the past decades, emission of greenhouse gases has accelerated to unsustainable levels. This is a serious issue that can have a devastating impact on everything from global economy to the terrestrial or marine ecosystem. A method for reducing the emission is named carbon capture and storage, which this project is based on. In this study, different concentrations of citric acid (CA) is used (as an additive) for the enhancement and optimization of carbon dioxid sorption properties of amorphous calcium carbonate (ACC), mesoporous magnesium carbonate (MMC) and calcium magnesium carbonate composite (CMC). These materials were heat treated in a calcination and an alternating carbonation process in order to study the carbon dioxid sorption performance. During the calcination process, CA undergoes a pyrolysis reaction in order to increase the specific surface area of the individual nanoparticles, which is an important factor for the sorption capacity. In the case of CMC, different molar ratios of magnesium oxide and calcium oxide were used in order to alter the concentration of the resulting magnesium oxide prior to heating. All three materials consisted of aggregations of nanometer-sized particles. Thermogravimetric analysis, scanning electron microscopy, surface area and porosimetry and infrared spectroscopy analysis suggest that the carbon dioxid sorption properties and the sintering stability of ACC and MMC do not improve since CA evaporates due to pyrolysis. Sintering was a greater problem for the evaluated CA treated ACC sample. However, in the case of CMC, the sorption and sintering properties were enhanced due to the higher Tamman-temperature of magnesium oxide, specifically for the lower concentration of magnesium oxide. After 19 carbonation cycles, CMC-1:1-25% CA showed signs of improved sintering stability and sorption capacity, compared to ACC-75% CA.

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Thomas, Ingrid M. "Changes in Food Sources of Calcium, Potassium, and Magnesium in the Diets of Adolescents with Hypertension in Response to a Behavioral Nutrition Intervention Emphasizing Fruit, Vegetable, and Low-fat Dairy Foods." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1311775395.

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PONGE-FERREIRA, CLAUDIA R. P. "Padronização dos radionuclídeos sup(45)Ca, sup(137)Cs e sup(204)Tl pelo metodo do tracador utilizando sistema de coincidência 4 pi beta-gama." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11287.

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Books on the topic "Calcium sources"

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Parker, Philip M., and James N. Parker. Ionized calcium: A medical dictionary, bibliography, and annotated research guide to Internet references. San Diego, CA: ICON Health Publications, 2004.

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Wilhelm, Leibniz Gottfried. Oeuvre mathématique autre que le calcul infinitésimal. Paris: A. Blanchard, 1986.

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Wilhelm, Leibniz Gottfried. Œuvre mathématique: Autre que le calcul infinitésimal. [Bordeaux]: J. Peyroux, 1986.

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Carratori, Luigina. Inventario dell'Archivio della Certosa di Calci. Ospedaletto, Pisa: Pacini, 1990.

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Structure as architecture: A source book for architects and structural engineers. Oxford: Elsevier/Architectural Press, 2005.

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Charleson, Andrew. Structure as architecture: A source book for architects and structural engineers. Oxford: Elsevier/Architectural Press, 2005.

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Carratori, Luigina. Archivio della Certosa di Calci: Archivio di Stato di Pisa, corporazioni religiose soppresse, secoli XIII-XIX ; inventario e studio. Ospedaletto, Pisa: Pacini, 2005.

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Ontario. Esquisse de cours 12e année: Fonctions avancées et introduction au calcul différentiel mcb4u cours préuniversitaire. Vanier, Ont: CFORP, 2002.

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Ahmed, Tanveer. A detailed investigation into the production of calcium alginate fibre from various algal sources. 1994.

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Publications, ICON Health. Calcium Citrate - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References. ICON Health Publications, 2004.

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Book chapters on the topic "Calcium sources"

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Bers, Donald M. "Sources and Sinks of Activator Calcium." In Excitation-Contraction Coupling and Cardiac Contractile Force, 39–62. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0658-3_3.

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Kalro, Brinda N., and Sarah L. Berga. "Calcium Requirements and Sources in Postmenopausal Women." In Menopause, 221–34. Totowa, NJ: Humana Press, 1999. http://dx.doi.org/10.1007/978-1-59259-246-3_14.

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Bers, Donald M. "Possible Sources and Sinks of Activator Calcium." In Excitation-Contraction Coupling and Cardiac Contractile Force, 33–48. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-1512-6_3.

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Wang, Zhao-Wen, Bojun Chen, and Qian Ge. "Roles and Sources of Calcium in Synaptic Exocytosis." In Molecular Mechanisms of Neurotransmitter Release, 61–84. Totowa, NJ: Humana Press, 2008. http://dx.doi.org/10.1007/978-1-59745-481-0_4.

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Nakano, Takashi, Junichiro Yoshimoto, Jeff Wickens, and Kenji Doya. "Calcium Responses Model in Striatum Dependent on Timed Input Sources." In Artificial Neural Networks – ICANN 2009, 249–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04274-4_26.

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Douglas, W. W. "Stimulus-Secretion Coupling: Variations on the Theme of Calcium-Activated Exocytosis Involving Cellular and Extracellular Sources of Calcium." In Novartis Foundation Symposia, 61–90. Chichester, UK: John Wiley & Sons, Ltd., 2008. http://dx.doi.org/10.1002/9780470720356.ch4.

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Engelstad, Orvis P. "Agronomic Evaluation of Potassium Polyphosphate and Potassium Calcium Pyrophosphates as Sources of Potassium." In The Role of Potassium in Agriculture, 63–77. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1968.roleofpotassium.c4.

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Ito, Yushi, and Takeo Itoh. "Sources of Activator Calcium for Force Generation and Maintenance of Airways Smooth Muscle." In Airways Smooth Muscle: Biochemical Control of Contraction and Relaxation, 153–86. Basel: Birkhäuser Basel, 1994. http://dx.doi.org/10.1007/978-3-0348-7681-0_8.

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Julian, Arianne V., Michael R. Umagat, and Renato G. Reyes. "Mineral Composition, Growth Performance and Yield of Pleurotus ostreatus on Rice Straw-Based Substrate Enriched with Natural Calcium Sources." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions, 1573–75. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_457.

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Beaugé, Luis, Marta Campos, and Roberto Pezza. "Understanding the Energy Source for Na+-Ca2+ Exchange after Dephosphorylation Steps of the Na+-ATPase Activity of Na+, K+-ATPase." In Calcium and Cellular Metabolism, 105–16. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9555-4_9.

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Conference papers on the topic "Calcium sources"

1

Shaw, Brandon, Michael Hunt, Woohong Kiim, Shyam Bayya, Darryl Boyd, Christopher Brown, Steve Bowman, and Jas Sanghera. "Fabrication and Spectroscopy Pr3+ doped Ceramic Calcium Lanthanum Sulfide for Mid-IR Laser Gain Material." In Mid-Infrared Coherent Sources. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/mics.2018.mm3c.5.

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2

Sene, Frank F., Vinicius O. Santos, and Claudio C. Motta. "Synthesis and characterization of high purity barium calcium aluminates for TWT impregnated cathodes." In 2012 IEEE Ninth International Vacuum Electron Sources Conference (IVESC). IEEE, 2012. http://dx.doi.org/10.1109/ivesc.2012.6264172.

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Dastgheyb, R. M., K. A. Barbee, and G. Gallo. "Investigating sources of axonal calcium in neuronal cultures modeling Traumatic Brain Injury." In 2015 41st Annual Northeast Biomedical Engineering Conference (NEBEC). IEEE, 2015. http://dx.doi.org/10.1109/nebec.2015.7117156.

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Lu, X. Lucas, Bo Huo, Andrew D. Baik, and X. Edward Guo. "Calcium Signaling in Bone Cell Networks Induced by Fluid Flow." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206043.

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Mechanical stimuli such as fluid flow can induce robust multiple intracellular calcium ([Ca2+]i) peaks in connected bone cell networks [1]. This fluid flow induced oscillation of [Ca2+]i can come from two sources: intracellular Ca2+ stores (e.g., endoplasmic reticulum, ER) and the extracellular environment. Moreover, [Ca2+]i signaling is mediated by various molecular pathways, such as IP3, ATP, PGE2, and NO. Osteocytes are believed to comprise a sensory network in bone tissue that monitors in vivo mechanical loading and triggers appropriate adaptive responses from osteoblasts and osteoclasts [2]. It is also well recognized that osteoblasts, the cells responsible for bone formation, can directly sense and respond to mechanical stimulation (e.g., fluid flow). In the present study, two types of cell networks were constructed in vitro with osteocyte-like and osteoblast-like cells, respectively, by using microcontact printing and self assembled monolayer (SAM) technologies. The calcium responses of the two types of cell networks to fluid flow were recorded, quantitatively analyzed, and compared. Then we examined how the [Ca2+]i response in the osteocyte cell network was influenced by gap junctions, intra/extracellular calcium sources, and other various molecular pathways.

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Iervoline, Larry (Irv). "Removal of Calcium Carbonate Build-Up in Condenser Tubes Restores Efficiency." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3398.

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Water is essential to the power generation process, and for many power generation plants that rely on cooling water systems to condense steam, total hardness in source water is a problem. The high mineral content in many sources of cooling water results in hardened, calcified scale deposits forming on the walls of condenser tubes. These deposits form an insulation barrier inhibiting heat transfer. The scale also reduces the inner diameter of the tubes, restricting the flow of cooling water and further reducing heat transfer. As the heat transfer rate falls, performance of the condenser degrades, which can lead to decreasing megawatt output of the plant. A power station in the United States sources hard lakewater for cooling. Like many plants utilizing hard water, the station relies on a water treatment program to control the formation of hard scale deposits. However, when the plant opened a closed cooling water exchanger (CCW) in its Unit 1, a layer of calcium carbonate was found on the tube walls throughout the bundle. The CCW exchanger was shot with a variety of mechanical cleaners to thoroughly remove the scale and other deposits and debris from the tubes. Plant management suspected that the same problem might be occurring in the main condenser, and they understood that if scale was forming inside the condenser, the resulting loss in heat transfer rate would be a contributing factor in the decreased efficiency of the unit. Since the plant was planning an eddy current test on 100% of the more than 12,000 stainless steel tubes in the main condenser, the tubes were required to be thoroughly cleaned. Upon opening the main condenser, technicians verified the presence of calcium carbonate fouling, confirming their suspicions. While not knowing the condition of the tubes underneath the deposit, plant engineers were concerned about the underlying tube condition. They were also looking for alternative cleaning methods to provide relief from environmental concerns often associated with chemical cleaning. To preserve tube integrity and assure thorough removal of deposits, the plant decided to clean the condenser tubes utilizing the same mechanical cleaning method as the CCW unit. The condenser tubes would be shot with a series of specialized mechanical tube cleaners, one designed to fracture the calcium carbonate and a second designed to remove the fractured scale and other deposits from the tubes. This paper highlights the role of hard water in condenser tube fouling, the need to remove scale from condenser tubes and the mechanical cleaning process that was used to restore condenser performance at a prototypical coal fired power station in the United States.

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Lee, Man Su, D. Yogi Goswami, Nikhil Kothurkar, and Elias K. Stefanakos. "Immobilization of Calcium Oxide Absorbent on a Fibrous Alumina Mat for High Temperature Carbon Dioixde Capture." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54187.

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Anthropogenic carbon dioxide emission from its sources must be reduced to decrease the threat of global warming. Calcium oxide is considered as an effective carbon dioxide absorbent in biomass or coal gasification process as well as conventional power plants. It reacts with carbon dioxide to form calcium carbonate which can be decomposed into the original oxide and carbon dioxide at high temperature by calcination. In order to make this method practical for the carbon dioxide capture and sequestration, the performance of the calcium oxide absorbent must be maintained over a large number of carbonation/calcination cycles. For this reason, loss in the surface area of the absorbent due to pore plugging and sintering of particles in cyclic operation must be avoided. To prevent or minimize this problem, a simple and effective procedure for immobilization of calcium oxide on a fibrous alumina mat was developed in this study. The prepared samples were observed by SEM and the cyclic performance of the calcium oxide absorbent was evaluated by TGA experiments and compared to the previous studies in literature. 75% and 62% maximum carbonation conversions of the prepared absorbents with 23 wt % and 55 wt % calcium oxide content were achieved respectively and remained stable even after ten cycles whereas conversion in the literature data dropped steeply with the number of cycles.

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Pilarczyk, Goetz, and Karl-Otto Greulich. "Combined use of UV-labile calcium chelators and calcium-sensitive dyes in a microscope with two light sources influencing different regions in a group of coordinated contracting cardiac myocytes." In BiOS Europe '97, edited by Irving J. Bigio, Herbert Schneckenburger, Jan Slavik, Katarina Svanberg, and Pierre M. Viallet. SPIE, 1997. http://dx.doi.org/10.1117/12.297965.

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8

Abbas, Ghazanfar, Rizwan Raza, Muhammad Ashraf Chaudhry, and Bin Zhu. "Preparation and Characterization of Nanocomposite Calcium Doped Ceria Electrolyte With Alkali Carbonates (NK-CDC) for SOFC." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33325.

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The entire world’s challenge is to find out the renewable energy sources due to rapid depletion of fossil fuels because of their high consumption. Solid Oxide Fuel Cells (SOFCs) are believed to be the best alternative source which converts chemical energy into electricity without combustion. Nanostructured study is required to develop highly ionic conductive electrolyte for SOFCs. In this work, the calcium doped ceria (Ce0.8Ca0.2O1.9) coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO3, where M = Na and K) electrolyte was prepared by co-precipitation method in this study. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology was characterized by X-Ray Diffractometer (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). The particle size was calculated in the range of 10–20nm by Scherrer’s formula and compared with SEM and TEM results. The ionic conductivity was measured by using AC Electrochemical Impedance Spectroscopy (EIS) method. The activation energy was also evaluated. The performance of the cell was measured 0.567W/cm2 at temperature 550°C with hydrogen as a fuel.

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Siagi, Zachary O., and Makame Mbarawa. "Experimental Investigation of the SO2 Abatement Capacity of South African Calcium-Based Materials." In ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36141.

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One of the most important steps in the wet limestone-gypsum flue gas desulphurization (WFGD) process is CaCO3 dissolution, which provides the dissolved alkalinity necessary for SO2 absorption. Accurately evaluating the CaCO3 dissolution rate is important in the design and efficient operation of WFGD plants. In the present work, the dissolution of limestone from different sources in South Africa has been studied in a pH-stat apparatus under conditions similar to those encountered in wet FGD processes. The influence of various parameters such as the reaction temperature (30 ≤ T ≤ 70°C), CaCO3 particle size (25 ≤ dp ≤ 63μm), solution acidity (4 ≤ pH ≤ 6), and chemical composition were studied in order to determine the kinetics of CaCO3 dissolution. The results obtained indicate that the dissolution rate increased with a decrease in particle size and an increase in temperature. The dissolution curves were evaluated in order to test the shrinking core model for fluid–solid systems. The analysis indicated that the dissolution of CaCO3 was controlled by chemical reaction, i.e. 1 − (1 − X)1/3 = kt.

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Themelis, Nickolas J. "Chlorine Sources, Sinks, and Impacts in WTE Power Plants." In 18th Annual North American Waste-to-Energy Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/nawtec18-3577.

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The principal sources of chlorine in the MSW feed to WTE power plants are food wastes (e.g., wheat, green vegetables, melon, pineapple), yard wastes (leaves, grass, etc.), salt (NaCl), and chlorinated plastics (mostly polyvinyl chloride). Chlorine has important impacts on the WTE operation in terms of higher corrosion rate than in coal-fired power plants, formation of hydrochloric gas that must be controlled in the stack gas to less than the U.S. EPA standard (29 ppm by volume), and potential for formation of dioxins and furans. Past Columbia studies have shown that the chlorine content in MSW is in the order of 0.5%. In comparison, chlorine concentration in coal is about 0.1%; this results in much lower HCl concentration in the combustion gases and allows coal-fired power plants to be operated at higher superheater tube temperatures and thus higher thermal efficiencies. Most of the chlorine output from a WTE is in the fly ash collected in the fabric filter baghouse of the Air Pollution Control system. This study examined in detail the sources and sinks of chlorine in a WTE unit. It is concluded that on the average MSW contains about 0.5% chlorine, which results in hydrogen chloride concentration in the WTE combustion gases of up to 600 parts per million by volume. About 45% of the chlorine content in MSW derives from chlorinated plastics, mainly polyvinyl chloride (PVC), and 55% from salt (NaCl) and chlorine-containing food and yard wastes. An estimated 97–98% of the chlorine input is converted to calcium chloride in the dry scrubber of the Air Pollution Control (APC) system and captured in the fly ash collected in the baghouse; the remainder is in the stack gas at a concentration that is one half of the U.S. EPA standard. Reducing the input of PVC in the MSW stream would have no effect on dioxin formation but would reduce the corrosion rate in the WTE boiler.

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