Letteratura scientifica selezionata sul tema "Calcium – Biodisponibilité"
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Articoli di riviste sul tema "Calcium – Biodisponibilité":
Lacour, Bernard, Sylvianne Tardivel e Tilman B. Drüeke. "Biodisponibilité du calcium exogène". Nutrition Clinique et Métabolisme 9, n. 1 (gennaio 1995): 15–28. http://dx.doi.org/10.1016/s0985-0562(05)80324-3.
Guéguen, L. "Le calcium du lait : fonctions, intérêts, besoins, biodisponibilité". Cahiers de Nutrition et de Diététique 40 (settembre 2005): 5–11. http://dx.doi.org/10.1016/s0007-9960(05)80201-9.
Ndong, Moussa, Salimata W, Nicole D, Amadou T.G e Rokhaya DG. "Valeur Nutritionnelle du Moringa Oleifera, Étude de la Biodisponibilité du fer, Effet de L'enrichissement de Divers Plats Traditionnels Sénégalais Avec la Poudre des Feuilles". African Journal of Food, Agriculture, Nutrition and Development 7, n. 14 (28 maggio 2007): 01–17. http://dx.doi.org/10.18697/ajfand.14.ipgri1-8.
Blaney, S., J. A. Zee, R. Mongeau e J. Marin. "Effet combiné des fibres alimentaires et des protéines sur la biodisponibilité potentielle du calcium". Canadian Institute of Food Science and Technology Journal 24, n. 5 (dicembre 1991): 198. http://dx.doi.org/10.1016/s0315-5463(91)70133-8.
Marin, J., J. A. Zee e R. Kouaouci. "11. Effet des hydrocolloides sur la biodisponibilité du calcium dans le lait et les produits laitiers". Canadian Institute of Food Science and Technology Journal 22, n. 4 (ottobre 1989): 404. http://dx.doi.org/10.1016/s0315-5463(89)70446-6.
Jiwoua Ngounou, C., R. Ndjouenkeu, C. M. F. Mbofung e L. Noubi. "Mise en evidence de la biodisponibilité du calcium et du magnésium au cours de la fermentation du lait par des bactéries lactiques isolées du lait caillé de zébu". Journal of Food Engineering 57, n. 3 (maggio 2003): 301–4. http://dx.doi.org/10.1016/s0260-8774(02)00302-3.
De La Guéronnière-Lévy, V. "Intérêt pour la santé des minéraux de l'eau : Comparaison de la biodisponibilité du calcium d'une eau minérale bicarbonatée calcique et de produits laitiers frais par la méthode de double marquage isotopique stable". Cahiers de l'Association Scientifique Européenne pour l'Eau et la Santé 1, n. 1 (1996): 31–36. http://dx.doi.org/10.1051/asees/19960101031.
Okon, B., L. A. Ibom, Y. D. R. Anlade e A. Dauda. "A biotechnology perspective of livestock nutrition on feed additives: a mini review". Nigerian Journal of Animal Production 49, n. 5 (26 maggio 2023): 47–58. http://dx.doi.org/10.51791/njap.v49i5.3763.
Castellanos C., Brayan Eduardo, Leidy Lorena Varón B. e Gloria Helena Gonzalez B. "Evaluation of the biodisponibility of iron in the elaboration of soft candy stuffed". Cuadernos de Semilleros de investigación 4, n. 1 (1 gennaio 2018): 141–55. http://dx.doi.org/10.33133/csi-4-2018-42.
Tesi sul tema "Calcium – Biodisponibilité":
Bel, Jérémie. "Biodisponibilité du calcium, magnésium et potassium dans les sols forestiers : Quantification, traçage et caractérisation des sources biodisponibles par dilution isotopique stable (⁴⁴Ca, ²⁶Mg et ⁴¹K)". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0078.
The plant available pools of calcium, magnesium and potassium are commonly assumed to be stored in the soil as exchangeable cations adsorbed on the cationic exchange capacity and extractible with a concentrated salt reagent (e.g. NH₄⁺, Ba²⁺). Many forest ecosystems have low to very low exchangeable pools of nutrient cations in the soil yet they show no nutrient deficiency symptoms. The discrepancies between different soil chemical fertility diagnosis approaches suggest that trees access nutrient resources that are not currently taken into account by conventional soil analysis methods. In the context of global change, the degradation of the chemical fertility of forest soils is a major concern. Identifying and quantifying the plant-available resources of nutrients in the soil is thus essential to better understand the biogeochemical functioning of forest ecosystems and ensure their sustainable management. The main objective of this PhD research is to identify and quantify the pools of Ca, Mg and K that contribute directly to the geochemical equilibrium processes between the soil and the solution with an innovative approach: ⁴⁴Ca, ²⁶Mg and ⁴¹K stable isotopic dilution. The isotopically exchangeable pools of Ca, Mg and K were measured by isotopic dilution in 177 individual soil samples from 26 sites covering a wide range of climatic, soil and forest cover contexts. The results demonstrate that the source/sink pool of the soil (pool in geochemical equilibrium with the soil solution, i.e. isotopically exchangeable pool) was not solely composed of the exchangeable pools measured by conventional soil analysis methods. The isotopically exchangeable pools were greater than the conventional exchangeable pools for 81%, 87% and 90% of the analyzed samples respectively for Ca, Mg and K. The additional pools of Ca, Mg and K in many cases were greater than 50% of their respective conventional exchangeable pool. Although the isotopically exchangeable pools are mainly composed of Ca, Mg and K extractible with an NH₄⁺ reagent, results show that Ca, Mg and K contained in soil phases extractible with a strong acid (HNO₃) also contribute directly to equilibrium processes between the soil and the solution. These available pools that are not currently accounted for by conventional soil analysis methods, are likely associated to amorphous and poorly crystalline secondary minerals in interaction with organic compounds for Ca and to K-specific sites in phyllosilicates and/or amorphous aluminosilicates for K. Comparing the changes in conventional physical and chemical soil properties and isotopically exchangeable pools of Mg, Ca and K at 11 sites of the RENECOFOR network between two sampling dates 11 years apart enabled to demonstrate that the isotopically exchangeable pools are very dynamic and play an active role in buffering the plant-availability of nutrient cations in the soil
Cohen-Jonathan, Simone. "Étude comparative de l'action d'eaux sulfatées calciques du gisement hydrominéral de Vittel sur la biodisponibilité du calcium dans le sang de la souris". Tours, 1987. http://www.theses.fr/1987TOUR3808.
Lebel, Dina. "Effet de l'ajout de la caséine à des protéines végétales dans le régime sur la biodisponibilité du calcium chez le rat". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25645.pdf.
Ayala-Bribiesca, Erik. "Effect of calcium on bioaccessibility of milk fat during digestion of Cheddar-type cheeses". Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/28167.
Cheddar cheese is recognized as an excellent source of calcium. In addition to its intrinsic nutritional value, calcium promotes lipolysis during digestion. This lipolysis enhancing effect is explained by the formation of calcium soaps with saturated long-chain fatty acids, resulting in the exposure of new substrate to the oil-water interphase of the milk fat droplets, thus enabling lipase to continue its action. On the other hand, the formation of calcium soaps reduces the absorption of saturated long-chain fatty acids. From a technological point of view, calcium plays a key role in the cheese structure as it participates in the formation of the paracasein gel. By such effects on the cheese matrix and the digestion of lipids, calcium can modify the bioavailability of the dairy fat. The objective of this project was to better understand the effect of calcium on the bioavailability of dairy fat from Cheddar cheeses, in aim to developing food matrices for controlled digestion and absorption of lipids. In a first step, Cheddar cheeses enriched with calcium by the addition of CaCl₂ were subjected to digestion in vitro. Chyme analysis showed that calcium-enriched cheeses disintegrated less rapidly than the non-enriched control but that their lipolysis progressed more rapidly, demonstrating the effect of calcium on the factors that influence lipolysis. In a second step, Cheddar cheeses were made from standardized milk with control, olein and stearin butter oils and salted with or without CaCl₂. The cheeses were digested in vitro to study the effect of calcium on lipolysis and the formation of calcium soaps from butter oils with different fatty acid profiles. Cheeses prepared with the stearin fraction (with the highest ratio of saturated long-chain fatty acids) were more resistant to physical disintegration and presented slower lipolysis than the other cheeses because of the high melting point of this fat. Cheeses enriched with calcium had higher levels of lipolysis than cheeses without enrichment. This increased lipolysis was due to the formation of calcium soaps with saturated long-chain fatty acids. These insoluble compounds could reduce the bioavailability of the fatty acids involved by preventing their absorption. To confirm the effect of calcium and type of fat on lipid bioavailability, the cheeses were subsequently used for an in vivo study. Postprandial lipemia of Wistar rats was monitored following ingestion of the cheese. The feces were analyzed to quantify the fatty acids excreted as calcium soaps. The cheeses had different effects in postprandial lipemia. Calcium enrichment led to a higher lipemic peak for the cheeses with olein, while a delayed peak was observed for cheeses with the stearin. This was explained by the increased affinity of calcium for saturated long-chain fatty acids, indirectly allowing faster lipolysis of other fatty acids, such as those with short- and medium-chains. The delay for stearin cheeses was due to their high content of saturated long-chain fatty acids, which formed soaps with calcium, thus reducing their absorption and ending up in feces. The results confirm that calcium plays an important role in intestinal digestion of dairy lipids by increasing the rate of lipolysis. However, it also limits the bioaccessibility of fatty acids by producing insoluble calcium soaps with saturated long-chain fatty acids at intestinal pH conditions. This project demonstrates that the bioavailability of lipids can be regulated by calcium in Cheddar cheese. This study demonstrates the interaction of calcium and lipids present in the dairy matrix during digestion and confirms its physiological repercussion. These effects on digestion and lipid absorption are of interest for the design of food matrices for the controlled release of liposoluble nutrients or bioactive molecules. Further research in this area will provide a better understanding of the role of foods in human health and enable the development of dairy products to control the release of nutrients to modulate metabolic responses. Keywords: Cheese, milk fat, digestion, lipolysis, calcium soaps.
Bellony, Rollin. "Etude de la biodisponibilite de 8 preparations de sels de calcium par le test de charge calcique orale". Amiens, 1988. http://www.theses.fr/1988AMIEM009.
Deslandes, Antoine. "Développement d'une méthode de calcul de profils d'absorption par déconvolution : application à l'étude de l'absorption d'antibiotiques". Paris 11, 1995. http://www.theses.fr/1995PA114843.
Husson, Angélique. "Impact de la composition minéralogique des sédiments sur la biodisponibilité de l’Uranium ˸ Une approche intégrant laboratoire-terrain-bioindicateur-calcul de spéciation". Electronic Thesis or Diss., Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM020.
The European Water Framework Directive introduced in 2000 has allowed to establish numerous quality environment standards for the last 18 years for compounds stemming from anthropic activity. However, the natural presence of uranium in the environment as well as itsreactivity complicates the construction of standards. The transfer of uranium betweensediment, water and the biological compartment is complex. Indeed, the passage of uranium through the cellular membrane can depend on the mineralogical composition as well as on the physico-chemical parameters. The objective of this study is to bring scientific foundationsaround these various parameters and hence to determine their impact on the accumulation.This way, the future definition of these new standards (NQE) takes into account the notion of bioavailability of contaminants. The strong impact of mineralogical phases such as ferrihydrite is both demonstrated in a post-mining context as well as within experiments in laboratory, as opposed to the quartz whose sorption capacity is low. A correlation is noted between the accumulation obtained by bioindicator “Chironomus riparius” and the one measured by a system of integrative passive sensors called DGT. This correlation is linked to the presence of potentially bioavailable species such as UO2OH2(aq), whose abundance is obtained by speciation calculations. These first conclusions give scientific foundations to feed the debate around the construction of the environment quality standards
Lambs, Luc. "Etudes sur la speciation des tetracyclines dans le plasma sanguin et determination des structures de leurs complexes metalliques predominants : influence sur la biodisponibilite de ces drogues". Toulouse 3, 1988. http://www.theses.fr/1988TOU30149.