Literatura académica sobre el tema "Essential mineral elements"
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Artículos de revistas sobre el tema "Essential mineral elements"
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WHITE, P. y M. BROADLEY. "Biofortifying crops with essential mineral elements". Trends in Plant Science 10, n.º 12 (diciembre de 2005): 586–93. http://dx.doi.org/10.1016/j.tplants.2005.10.001.
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Bidlack, Wayne R. "Handbook of Nutritional Essential Mineral/Elements". Journal of the American College of Nutrition 16, n.º 5 (octubre de 1997): 443. http://dx.doi.org/10.1080/07315724.1997.10738037.
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NV, Rylova. "Trace Elements in Young Field Hockey Players and Fencers". Journal of Orthopaedics & Bone Disorders 2, n.º 3 (2018): 1–5. http://dx.doi.org/10.23880/jobd-16000163.
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Active physical exercises are associated with high body mineral demand that can cause mineral disbalances with diverse negative health outcomes. The purpose of this study is to examine the impact of sport - related factors on mineral composition in young ath letes. Saliva and hair samples were chosen for the analysis as reflecting immediate and more permanent mineral status, respectively. The samples were analyzed by spectral methods with inductively coupled plasma for eight essential minerals: calcium (Ca), c hromium (Cr), iron (Fe), potassium (K), magnesium (Mg), selenium (Se), and zinc (Zn). The results from athletes were compared to ones from the control group of adolescent non - athletes. Different minerals demonstrated sampling specific distribution. Sport t ype specificity of mineral content was found. These findings can help in the process of mineral status data standardization and in training process to correct the sport - associated mineral disbalances.
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Moore, Eli K., Daniella L. Martinez, Naman Srivastava, Shaunna M. Morrison y Stephanie J. Spielman. "Mineral Element Insiders and Outliers Play Crucial Roles in Biological Evolution". Life 12, n.º 7 (24 de junio de 2022): 951. http://dx.doi.org/10.3390/life12070951.
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The geosphere of primitive Earth was the source of life’s essential building blocks, and the geochemical interactions among chemical elements can inform the origins of biological roles of each element. Minerals provide a record of the fundamental properties that each chemical element contributes to crustal composition, evolution, and subsequent biological utilization. In this study, we investigate correlations between the mineral species and bulk crustal composition of each chemical element. There are statistically significant correlations between the number of elements that each element forms minerals with (#-mineral-elements) and the log of the number of mineral species that each element occurs in, and between #-mineral-elements and the log of the number of mineral localities of that element. There is a lesser correlation between the log of the crustal percentage of each element and #-mineral-elements. In the crustal percentage vs. #-mineral-elements plot, positive outliers have either important biological roles (S, Cu) or toxic biological impacts (Pb, As), while negative outliers have no biological importance (Sc, Ga, Br, Yb). In particular, S is an important bridge element between organic (e.g., amino acids) and inorganic (metal cofactors) biological components. While C and N rarely form minerals together, the two elements commonly form minerals with H, which coincides with the role of H as an electron donor/carrier in biological nitrogen and carbon fixation. Both abundant crustal percentage vs. #-mineral-elements insiders (elements that follow the correlation) and less abundant outsiders (positive outliers from the correlation) have important biological functions as essential structural elements and catalytic cofactors.
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Krivovichev, Vladimir G., Sergey V. Krivovichev y Marina V. Charykova. "Tellurium Minerals: Structural and Chemical Diversity and Complexity". Minerals 10, n.º 7 (12 de julio de 2020): 623. http://dx.doi.org/10.3390/min10070623.
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The chemical diversity and complexity of tellurium minerals were analyzed using the concept of mineral systems and Shannon informational entropy. The study employed data for 176 Te mineral species known today. Tellurium minerals belong to six mineral systems in the range of one-to-six species-defining elements. For 176 tellurium minerals, only 36 chemical elements act as essential species-defining constituents. The numbers of minerals of main elements are calculated as follows (the number of mineral species is given in parentheses): O (89), H (48), Cu (48), Pb (43), Bi (31), S (29), Ag (20), Fe (20), Pd (16), Cl (13), and Zn (11). In accordance with their chemistry, all Te minerals are classified into five types of mineral systems: tellurium, oxides, tellurides and intermetalides, tellurites, and tellurates. A statistical analysis showed positive relationships between the chemical, structural, and crystallochemical complexities and the number of essential species-defining elements in a mineral. A positive statistically significant relationship between chemical and structural complexities was established. It is shown that oxygen-free and oxygen-bearing Te minerals differ sharply from each other in terms of chemical and structural complexity, with the first group of minerals being simpler than the second group. The oxygen-free Te minerals (tellurium, tellurides, and intermetallides) are formed under reducing conditions with the participation of hydrothermal solutions. The most structurally complex oxygen-bearing Te minerals originate either from chemical weathering and the oxidation of ore deposits or from volcanic exhalations (Nabokoite).
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Schwalfenberg, Gerry K. y Stephen J. Genuis. "Vitamin D, Essential Minerals, and Toxic Elements: Exploring Interactions between Nutrients and Toxicants in Clinical Medicine". Scientific World Journal 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/318595.
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In clinical medicine, increasing attention is being directed towards the important areas of nutritional biochemistry and toxicant bioaccumulation as they relate to human health and chronic disease. Optimal nutritional status, including healthy levels of vitamin D and essential minerals, is requisite for proper physiological function; conversely, accrual of toxic elements has the potential to impair normal physiology. It is evident that vitamin D intake can facilitate the absorption and assimilation of essential inorganic elements (such as calcium, magnesium, copper, zinc, iron, and selenium) but also the uptake of toxic elements (such as lead, arsenic, aluminum, cobalt, and strontium). Furthermore, sufficiency of essential minerals appears to resist the uptake of toxic metals. This paper explores the literature to determine a suitable clinical approach with regard to vitamin D and essential mineral intake to achieve optimal biological function and to avoid harm in order to prevent and overcome illness. It appears preferable to secure essential mineral status in conjunction with adequate vitamin D, as intake of vitamin D in the absence of mineral sufficiency may result in facilitation of toxic element absorption with potential adverse clinical outcomes.
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Lamaro, Gloria Peace, Yemane Tsehaye, Atkilt Girma, Andrea Vannini, Riccardo Fedeli y Stefano Loppi. "Essential Mineral Elements and Potentially Toxic Elements in Orange-Fleshed Sweet Potato Cultivated in Northern Ethiopia". Biology 12, n.º 2 (7 de febrero de 2023): 266. http://dx.doi.org/10.3390/biology12020266.
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This study investigated the influence of the agro-climatic environment of Northern Ethiopia on the content of essential mineral elements of selected orange-fleshed sweetpotato genotypes, the potential contribution of each genotype’s essential mineral elements to the recommended dietary allowance, and the potential risk to human health from the accumulation of potentially toxic elements in the tuberous roots of the studied genotypes. The results showed consistent interspecific variations in the content of essential mineral elements among the studied orange-fleshed sweetpotato genotypes, as well as important intraspecific differences, which could depend on the variations in soil mineral and organic matter content, rainfall, temperature, as well as interactions between genotype and environment. The investigated genotypes, especially Kulfo, Ininda, Gloria, and Amelia, can provide an amount of several essential mineral elements high enough to meet 100% of the recommended dietary allowance for all age groups ≤ 8 years. The mean content of potentially toxic elements in tuberous roots and their daily intake values were within the recommended permissible levels; likewise, no health risk was associated with the consumption of these genotypes for Cr, As, and Pb. However, Al, Cd, Cu, Fe, Mn, and Ni is > 1, consumption imposes health risks based on daily accumulation.
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Cinquanta, Luciano, Cinzia Di Cesare, Remo Manoni, Angela Piano, Piero Roberti y Giancarlo Salvatori. "Mineral essential elements for nutrition in different chocolate products". International Journal of Food Sciences and Nutrition 67, n.º 7 (26 de junio de 2016): 773–78. http://dx.doi.org/10.1080/09637486.2016.1199664.
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Stanisławska, Iwona J., Ramona Figat, Anna K. Kiss y Barbara Bobrowska-Korczak. "Essential Elements and Isoflavonoids in the Prevention of Prostate Cancer". Nutrients 14, n.º 6 (14 de marzo de 2022): 1225. http://dx.doi.org/10.3390/nu14061225.
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The intake of selected minerals, especially zinc, calcium and selenium, and high consumption of dietary isoflavones are recognised as factors influencing prostate cancer risk. Moreover, changes in levels of some essential elements are characteristic of the disease. Here, we examined the combined effects of main dietary isoflavonoids (genistein, daidzein and its metabolite, equol) and minerals implicated in prostate cancer, namely zinc, selenium, copper, iron and calcium, on LNCaP prostate cancer cells proliferation. Secondly, we evaluated the influence of the combinations on genotoxicity of model mutagens, 4-nitroquinoline oxide (4NQO) and 2-aminoanthracene (2AA), in the umu test. All combinations of isoflavonoids and minerals inhibited prostate cancer cells growth. However, only mixtures with iron ions had significantly stronger effect than the phytochemicals. Interestingly, we observed that only genistein attenuated genotoxicity of 4NQO. The addition of any tested mineral abolished this effect. All tested isoflavonoids had anti-genotoxic activity against 2AA, which was significantly enhanced in the presence of copper sulphate. Our results indicate that the tested minerals in physiological concentrations had minimal influence on the anti-proliferative activity of isoflavonoids. However, they significantly modulated the anti-genotoxic effects of isoflavonoids against both metabolically activated and direct mutagens. Thus, the minerals intake and nutritional status may modulate protective action of isoflavonoids.
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Dragicevic, Vesna, Bogdan Nikolic, Milica Radosavljevic, Nenad Djuric, Dejan Dodig, Milovan Stoiljkovic y Natalija Kravic. "Barley grain enrichement with essential elements by agronomic biofortification". Acta Periodica Technologica, n.º 47 (2016): 1–9. http://dx.doi.org/10.2298/apt1647001d.
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Barley grain is rich in mineral nutrients, but their bioavailability to humans depends on antinutrients that restrain bioavailability and promoters that promote bioavailability. The aim of this study was to examine composition of barley grain, including phytate and phenolics as antinutrients, carotenoids and glutathione as promoters and mineral elements, such as Ca, Mg, Fe, Si, Zn and Mn influenced by various non-standard foliar fertilizers (Zircon, Chitosan, Siliplant, Propikonazole), including some hormonal growth-stimulators (Epin Extra, Benzyladenine), as potential biofortification measure. Chitosan increased glutathione concentration in grain. Unfavorable meteorological conditions were partly mitigated by application of Benzyladenine and Siliplant, reflected through increased potential bioavailability of P, Mg, Ca and Fe.
Tesis sobre el tema "Essential mineral elements"
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Morrison, Elizabeth. "The contribution of Australian wheat and wheat products essential trace mineral intake". Thesis, Queensland University of Technology, 1996. https://eprints.qut.edu.au/36731/1/36731_Morrison_1996.pdf.
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Nutrition authorities' current recommendations include an increased consumption of whole grain cereal products, including wheat products, in order to increase consumption levels of dietary .fibre. However, the essential trace mineral contribution of such products tends to be underestimated. The trace mineral data for Australian wheat and wheat products, moreover, tends to be lacking or out-of-date. Consequently, a survey was conducted to obtain information on the nutritional value of wheat and wheat products with regard to trace minerals. Wheat grain samples were procured from around Australia, over two seasons in most cases. A method was developed utilising a microwave digestion procedure and inductively-coupled plasma atomic emission spectroscopy (ICP-AES) to analyse these samples for the following minerals (mean result of 233 samples in parenthesis): magnesium (1160mg/kg), zinc (18mg/kg), iron (30mg/kg), manganese (33mg/kg), copper (3.2mg/kg), nickel (0.30mg/kg), chromium (0.04mg/kg), cobalt (0.03mg/kg), cadmium (less than detection limit) and aluminium (3.7mg/kg). Mineral content was, generally, strongly correlated (positively) with protein content. Significant geographical and seasonal variations in the mineral content of wheat grain were identified. A number of wheat products were also analysed as above. An assessment of the contribution of wheat and wheat products to the mineral intake of a general adult Australian population was explored and concluded to be significant.
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Certain, Cassandre Mathilde Hélène. "Variabilité spatio-temporelle et expérimentale de la valeur fonctionnelle de cinq plantes halophytes de Nouvelle-Calédonie, candidates à l’agriculture biosaline". Electronic Thesis or Diss., Nouvelle Calédonie, 2021. http://www.theses.fr/2021NCAL0003.
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La diminution globale des ressources en eau douce et en terres arables non salinisées à travers le monde a conduit à l’essor mondial de cultures biosalines, à partir de plantes « halophytes » capables de croître et de se multiplier sous de fortes concentrations en sel. Parmi les espèces halophytes candidates à ce type de productions biosalines en Nouvelle-Calédonie, cinq espèces ont été sélectionnées sur la base du potentiel retrouvé au sein de leurs genres : Suaeda maritima, Sarcocornia quinqueflora, Enchylaena tomentosa, Atriplex jubata et Salsola australis. La culture de ces plantes pourrait englober plusieurs applications biotechnologiques, touchant les secteurs de l’agro-alimentaire, de la cosmétique, des bioénergies ou encore de la restauration écologique. Parmi ces applications, la production de légumes biosalins fonctionnels (riches en métabolites fonctionnels d’intérêt) est en recrudescence au niveau mondial. Le monde scientifique a en effet clairement établi un lien entre la tolérance au sel et la richesse des plantes halophytes en plusieurs métabolites fonctionnels d’intérêt (tels que les acides gras polyinsaturés ou les antioxydants).Néanmoins, les valeurs fonctionnelles des plantes halophytes sont supposées variables et dictées par leurs réponses aux variabilités de l’environnement (tolérance au sel, nutrition, etc.). L’étude de telles relations est indispensable à l’établissement du potentiel agronomique local d’espèces d’intérêt telles que celles sélectionnées.Ceci a été l’objet du présent travail de thèse. Il a eu pour but d’évaluer le potentiel de chacune des espèces en tant que source de composés fonctionnels mais aussi d’évaluer leurs variabilités selon les modifications, naturelles ou contrôlées de l’environnement. A ce titre, il montre que les tissus comestibles de ces cinq espèces ont des valeurs fonctionnelles élevées en minéraux essentiels, acides gras polyinsaturés et/ou antioxydants en comparaison avec plusieurs normes diététiques et légumes fonctionnels d’intérêt. Il montre également des relations entre les compositions en acides gras et en éléments essentiels des espèces et les caractéristiques spatio-temporelles de leur milieu naturel. Il montre enfin des relations entre la croissance et les compositions en acides gras et/ou en antioxydants des espèces et différents traitements expérimentaux appliqués en serre, combinant salinité et nutrition azotée sous différentes formes. A terme, ces différents résultats pourront contribuer à l’émergence de cultures biosalines expérimentales à plus large échelle en Nouvelle-Calédonie et à des préconisations de pratiques culturales optimales pour ces cultures. Ils soutiennent ainsi des objectifs centraux de la politique agricole du territoire comme le verdissement et la diversification de l’agricultureThe global decrease of freshwaters and non-salinized lands around the world led to the development of saline crops worldwide, from halophyte plants, capable of grow and multiply in high salty environments. Based on intra-genera potentials, five halophytes from Amaranthaceae family drew attention to test their saline crop potential in New Caledonia: Suaeda maritima, Sarcocornia quinqueflora, Enchylaena tomentosa, Atriplex jubata and Salsola australis. The cultivation of such plants could encompass several biotechnological applications, belonging to the sectors of agri-foods, cosmetics, bioenergy or ecological restoration. Among these applications, the production of functional vegetables (rich in functional metabolites) from halophyte species is increasing worldwide. The scientific world has clearly established a link between salt tolerance of halophytes and their richness in functional metabolites (such as polyunsaturated fatty acids or antioxidants). But, the functional values of halophytes are assumed to be variable and dictated by their responses to environment (salt tolerance, nutrition, etc.). So, the study of such relationships is essential to define the local agronomic potential of potential future crop species. The present thesis work aimed to assess the potential of each of the five selected species as source of functional metabolites, as well as their functional variabilities according to environmental changes, whether natural or controlled. As such, it shows that the edible tissues of the five species have high functional values for essential minerals, polyunsaturated fatty acids and antioxidants in comparison with dietary standards and with other functional vegetables. It also shows the relationships between the compositions for polyunsaturated fatty acid and essential elements in species and the spatio-temporal variations of their natural environment. Finally, it shows the relationships between the growth and the compositions for antioxidants and fatty acids in species and experimental treatments, combining different salinity and nitrogen forms.Ultimately, such results are intended to help the emergence of experimental saline crops at larger scale in New Caledonia, in particular trough recommendations of optimal cultivation practices. Thus, they support some objectives of agricultural local policy, such as the greening and the diversification of agriculture
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Bango, Happy. "Cucurbitacin chemical residues, non-phytotoxic concentration and essential mineral elements of nemarioc-al and nemafric-bl phytonematicides on growth of tomato plants". Thesis, 2019. http://hdl.handle.net/10386/3157.
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Thesis(M.Sc.( Agriculture, Horticulture)) -- University of Limpopo, 2019Worldwide, tomato (Solanum lycopersicum L.) is one of the most important crops grown for nutritional value and health benefits, and are highly susceptible to root-knot (Meloidogyne species) nematodes. Following the withdrawal of synthetic chemical nematicides, Nemarioc-AL and Nemafric-BL phytonematicides have been researched and developed as alternatives to synthetic chemical nematicides. However, Nemarioc-AL and Nemafric-BL phytonematicides contains allelochemicals namely, cucurbitacin A (C32H46O9) and cucurbitacin B (C32H46O8) as their active ingredients. Therefore, the objective of this study was to determine whether increasing concentration of Nemarioc AL and Nemafric-BL phytonematicides would result in cucurbitacin residues in tomato plant, to generate mean concentration stimulation point (MCSP) values, overall sensitivity (∑k) and selected foliar mineral elements of tomato plant. Two parallel trials of Nemarioc AL and Nemafric-BL phytonematicides were conducted under field conditions, with each validated the next season. Each trial had seven treatments, namely, 0, 2, 4, 8, 16, 32 and 64% of Nemarioc-AL or Nemafric-BL phytonematicide concentrations, arranged in a randomised complete block design (RCBD), with five replications. In each trial, the seasonal interaction on variables was not significant and therefore data were pooled across the two seasons (n = 70). In both phytonematicides, the cucurbitacin residues were not detected in soil and tomato fruit. Plant variables and selected foliar nutrient elements were subjected to the Curve-fitting Allelochemical Response Data (CARD) model to generate biological indices which allowed for the calculation of MCSP of phytonematicides on tomato and their ∑k values of tomato to Nemarioc-AL and Nemafric BL phytonematicides. In Nemarioc-AL phytonematicide experiment, MCSP for tomato plant variables was at 1.13%, with the ∑k of 60 units, while the MCSP for selected tomato nutrient elements in leaf tissues was at 2.49%, with the ∑k of 21 units. Plant height, chlorophyll content, stem diameter, number of fruit, dry fruit mass, dry shoot mass and dry root mass each with increasing concentration of Nemarioc-AL phytonematicide exhibited positive quadratic relations with a model explained by 95, 82, 96, 89, 83, 83 and 92%, respectively. Similarly, K, Na and Zn each with increasing Nemarioc-AL phytonematicide concentration exhibited positive quadratic relations with a model explaining a strong relationship by 91, 96 and 89%. In Nemafric-BL phytonematicide experiment, MSCP for tomato plant variables was at 1.75%, with the ∑k of 45 units, whereas MCSP for selected tomato nutrient elements in leaf tissues was at 3.72% with the ∑k of 33 units. Plant height, chlorophyll content, stem diameter, number of fruit, dry fruit mass, dry shoot mass and dry root mass and increasing Nemafric-BL phytonematicide concentration exhibited positive quadratic relations with the model explaining a strong relationship by 92, 83, 97, 96, 87, 94 and 96%. Likewise, Na and Zn each with increasing Nemafric-BL phytonematicide concentration exhibited positive quadratic relations with a model explaining their relationship by 93 and 83%, respectively. In contrast, K with increasing Nemafric-BL phytonematicide concentration exhibited negative quadratic relations with a model explaining the relationship by 96%. In conclusion, tomato plant variables and selected foliar nutrient elements over increasing concentration of phytonematicides exhibited DDG patterns, characterised by three phases, namely, stimulation, neutral and inhibition. The developed non-phytotoxic concentration would be suitable for successful tomato production under field conditions.
Libros sobre el tema "Essential mineral elements"
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L, O'Dell Boyd y Sunde Roger Allan, eds. Handbook of nutritionally essential mineral elements. New York: Marcel Dekker, 1997.
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Watts, David L. Trace elements and other essential nutrients: Clinical application of tissue mineral analysis. [S.L: s.n.], 1995.
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Bogden, John D. y Leslie M. Klevay, eds. Clinical Nutrition of the Essential Trace Elements and Minerals. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7.
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D, Bogden John y Klevay Leslie M, eds. Clinical nutrition of the essential trace elements and minerals: The guide for health professionals. Totowa, N.J: Humana Press, 2000.
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O'Dell, Boyd L. y Roger A. Sunde. Handbook of Nutritionally Essential Mineral Elements. Taylor & Francis Group, 2019.
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O'Dell, Boyd L. y Roger A. Sunde, eds. Handbook of Nutritionally Essential Mineral Elements. CRC Press, 1997. http://dx.doi.org/10.1201/9781482273106.
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O'Dell, Boyd L. y Roger Allan Sunde. Handbook of Nutritionally Essential Mineral Elements. Taylor & Francis Group, 1997.
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O'Dell, Boyd L. y Roger A. Sunde. Handbook of Nutritionally Essential Mineral Elements. Taylor & Francis Group, 1997.
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O'Dell, Boyd L. y Roger A. Sunde. Handbook of Nutritionally Essential Mineral Elements. Taylor & Francis Group, 2019.
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O'Dell, Boyd L. y Roger A. Sunde. Handbook of Nutritionally Essential Mineral Elements. Taylor & Francis Group, 1997.
Buscar texto completoCapítulos de libros sobre el tema "Essential mineral elements"
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Bhatla, Satish C. y Manju A. Lal. "Essential and Functional Mineral Elements". En Plant Physiology, Development and Metabolism, 25–49. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5736-1_2.
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Matkovic, Velimir, Nancy E. Badenhop y Jasminka Z. Ilich. "Trace Element and Mineral Nutrition in Adolescents". En Clinical Nutrition of the Essential Trace Elements and Minerals, 153–82. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_10.
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Picciano, Mary Frances. "Trace Element and Mineral Nutrition During Lactation". En Clinical Nutrition of the Essential Trace Elements and Minerals, 139–51. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_9.
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Dunn, John T. "Trace Element and Mineral Nutrition in Endocrine Diseases". En Clinical Nutrition of the Essential Trace Elements and Minerals, 227–38. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_13.
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Klahr, Saulo. "Trace Element and Mineral Nutrition in Renal Disease". En Clinical Nutrition of the Essential Trace Elements and Minerals, 273–87. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_16.
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Sturniolo, Giacomo Carlo, Cinzia Mestriner y Renata D’Incà. "Trace Element and Mineral Nutrition in Gastrointestinal Disease". En Clinical Nutrition of the Essential Trace Elements and Minerals, 289–307. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_17.
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Milne, David B. "Laboratory Assessment of Trace Element and Mineral Status". En Clinical Nutrition of the Essential Trace Elements and Minerals, 69–90. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_5.
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Scholl, Theresa O. y Thomas M. Reilly. "Trace Element and Mineral Nutrition in Human Pregnancy". En Clinical Nutrition of the Essential Trace Elements and Minerals, 115–38. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_8.
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Klevay, Leslie M. "Trace Element and Mineral Nutrition in Ischemic Heart Disease". En Clinical Nutrition of the Essential Trace Elements and Minerals, 251–71. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-040-7_15.
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Blevins, Dale G. "Uptake, Translocation, and Function of Essential Mineral Elements in Crop Plants". En Physiology and Determination of Crop Yield, 259–75. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1994.physiologyanddetermination.c17.
Texto completoActas de conferencias sobre el tema "Essential mineral elements"
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A.A., Komarov, Stepanov M.B., Nayda N.M. y Omelchenko M.P. "NEW TYPES OF FERTILIZERS FOR THE PRODUCTION OF ESSENTIAL OILS AND MEDICINAL PLANTS". En НАУЧНЫЙ И ИННОВАЦИОННЫЙ ПОТЕНЦИАЛ РАЗВИТИЯ ПРОИЗВОДСТВА, ПЕРЕРАБОТКИ И ПРИМЕНЕНИЯ ЭФИРОМАСЛИЧНЫХ И ЛЕКАРСТВЕННЫХ РАСТЕНИЙ. ИТ «АРИАЛ», 2021. http://dx.doi.org/10.33952/2542-0720-2021-10-11-06-1.
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Based on the analysis of the use of traditional mineral and organic fertilizers, as well as preparations, an assessment of their use for the production of essential oils and medicinal plants is presented. The limited possibilities of their application are related to the contradictions that arise in the "dose-effect" - "dosequality" systems. The article presents an assessment of the use of new types of highly effective polymer-based fertilizers that are promising for the production of essential oils and medicinal plants. Including microelement fertilizers "Aquadon-Micro", macroelement fertilizers with additives of microelements of the "Zelenit" and "Kora" series, as well as complex polymer fertilizers of the "Vitanoll" series, where the polymer matrix includes not only food elements, but also means of controlling the growth and development of plants.
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Alamooti, M. y S. Namie. "A Rock Physics Feasibility Study of the Geothermal Lodgepole Reservoir, North Dakota". En 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0319.
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ABSTRACT Geothermal energy extraction from the Earth's crust requires a thorough understanding of the mechanisms that enhance fluid flow in rocks. Geoscientists must evaluate the elements that regulate the development of permeability networks and the parameters that control rocks’ responses to stimulation procedures across various spatial and time scales. The Williston Basin is a major geological depression with complex stratigraphic sequences, and its rocks’ complex microstructures and mineral compositions make it challenging to assess effective moduli accurately. In addition, the Lodgepole Formation in the Williston Basin is a primary geothermal aquifer with low-salinity waters co-produced with oil and gas, which are often discarded as waste. This study aimed to develop a rock physics model of the Lodgepole formation, emphasizing its geomechanics and petrophysical features, and explore the connections to locate additional geothermal energy sources in the future. The study used several methods to estimate rock physics characteristics, including elastic modulus of minerals and rock pore shape and found that the intra-particle model matches the available data. INTRODUCTION The Lodgepole Formation, is the second deepest (Fig. 1) of the Williston Basin's four principal geothermal aquifers. The Formation has been identified as a potential source of low-salinity geothermal fluids co-produced with oil and gas. These fluids are often considered waste and are discarded by reinjection into the ground. However, North Dakota is now exploring harnessing geothermal waters to produce power. To evaluate the geothermal potential of the Lodgepole Formation, it is essential to understand the geomechanical and petrophysical features of the rocks in the Formation. Non-typical reservoir rocks, such as tight sandstones and shales, are known for their complex microstructures and mineral compositions, making it challenging to assess their effective moduli. Additionally, data from the literature may only sometimes be accurate since XRD data is only continuous at some levels, and the elastic modulus information for minerals can vary based on the study location.
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Neththasinghe, N. A. S. A., E. D. C. T. Chandrasekara, E. M. S. Ekanayake, N. D. R. Madushan, W. M. U. K. Rathnayake, D. N. Sirisena y L. D. B. Suriyagoda. "Nitrogen, Phosphorus and Potassium Concentrations in the Grains of Selected Rice Varieties in Sri Lanka". En The SLIIT International Conference on Engineering and Technology 2022. Faculty of Engineering, SLIIT, 2022. http://dx.doi.org/10.54389/xjet2641.
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Rice (Oryza sativa L.) is the staple food for Sri Lankans, and it serves as a key source of essential mineral elements. The variation of grain nutrient concentrations as affected by genetic factors (variety, grain color and age group) are not known, and those were tested in the current study. Total of 200 rice grain samples were collected using a stratified random sampling approach, representing all agro-climatic zones in Sri Lanka. Grain nitrogen (N), phosphorus (P) and potassium (K) concentrations were measured using Kjeldahl, Colorimetric, and General methods, respectively. Grain N P and K concentrations were significantly different among rice varieties (P<0.1). Grain N concentration varied between 4-19 mg g−1 . The highest grain N concentration was recorded in Bg 307 (14 mg g−1 ) while the lowest (i.e., < 10 mg g−1 ) in Bg 367, Bg 374, Bg 358, Bg 310 and Bg 379-2. Grain P concentration varied in the range 0.6- 1.7 mg g−1 . Grain P concentration in At 406 was the highest (1.6 mg g-1), followed by Bg 307, Bg 94-1, Bg 367 i.e., >1.3 mg g-1 and the lowest in Bg 403, Ld 365 and Bg 310 i.e., < 1 mg g−1 . Bg 357, Ld 365, Bg 406, Ld 368 and Bg 310 rice varieties showed significantly lower P concentration than other varieties (P<0.1) Grain N, P and K concentrations were similar among different age classes of rice varieties (P>0.05). Moreover, grain N and P concentrations between the red and white grain varieties were similar (P>0.05). However, varieties with white color grains had higher K concentration than in red rice varieties. There was a significant correlation between grain P and K concentrations (r =0.496, P<0.001). This information would be useful when selecting rice varieties with high and low nutritional qualities and implementing sustainable nutrient management practices in rice-based cropping systems in Sri Lanka. KEYWORDS: Age class, Nitrogen, Phosphorus, Potassium, Rice
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Aboushanab, Mahmoud Sami, Khaloud Al Naimi, Mohamed Mahmoud y Muhammad Arif. "Experimental Investigation of the Effect of Surface Cleavage and Exposure Time on Rock Wettability". En Gas & Oil Technology Showcase and Conference. SPE, 2023. http://dx.doi.org/10.2118/214078-ms.
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Abstract The wettability behavior of reservoir rocks is recognized as a key factor that influences oil recovery. Several recent studies have investigated factors affecting wettability. However, a thorough understanding of all the elements influencing rock wettability remains elusive. Surface wettability is known to be influenced by a range of operating conditions and the surface-related parameters e.g., surface roughness, surface chemistry etc. While these factors have been rigorously reported before, one key factor that received little or no attention is the surface cleavage. In particular, pure calcite mineral demonstrates multiple cleavage plane, and thus wettability of freshly cleaved calcite can vary depending on the cleavage plane, which can also be very different to the wettability of calcite surface exposed to the atmosphere. Moreover, the traditionally reported macro-scale contact angles lack a bit in terms of the identification of three-phase contact line, and thus the use of high-resolution micro-scale approaches for contact angle measurement becomes essential. Thus, in this study, we investigate the wettability of freshly cleaved and exposed calcite and quartz surfaces and examine the difference in the observed wetting behavior. The contact angles were measured at both micro- and macro-scale using a conventional sessile drop method and environmental scanning electron microscopy (ESEM), respectively to also examine any additional impact of the scale of observation. Advanced image analysis algorithm is then used to process the droplet image and examine the contact angles. Additionally, FTIR spectroscopy is also used to determine the surface chemistry changes in the exposed surfaces that would lead to any wettability alteration. The results of this study indicate that the contact angles observed for both freshly cleaved calcite and freshly fractured quartz are much less than the contact angles of the exposed calcite and quartz – suggesting that freshly cleaved surfaces are more hydrophilic than their exposed versions. Thus, much caution should be considered during dealing with calcite and quartz; as exposure time could be a crucial factor in wettability determination.
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Sullivan, Kaj, Rebekah Moore, Frank Vanhaecke y Katharina Moser. "The influence of physiological and lifestyle factors on essential mineral element isotopic compositions in the human body: implications for the design of isotope metallomics research". En Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.15501.
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Awejori, G. A., F. Xiong, A. Katende y M. Radonjic. "Produced Fluid Induced Mineralogy and Elemental Alterations of Caney Shale, Southern Oklahoma". En 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0881.
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ABSTRACT This study involves batch reactor experiments and subsequent analyses of samples from Caney Shale in the Ardmore Basin of South-Central Oklahoma. Samples include mainly rock cores and cuttings recovered from two wells respectively drilled vertically through and horizontally across the Caney Shale. Mineralogical compositions are obtained by X-Ray Diffraction (XRD) measurements whilst microstructure and elemental distribution are acquired by Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS) respectively. Batch experiments are then conducted using selected rock samples and produced fluid from the Caney Formation. Deionized water is also reacted with some samples to serve as standard. Experiments are conducted at 95°C and ambient pressure for 7 and 30 days to assess the geochemical rock-fluid interactions. Results show rock mineralogical compositions are predominantly quartz, feldspar, carbonates, and clay with minor pyrite. Post-experimental mineralogical changes observed in samples include increased amorphous entities especially within the clay portions of XRD plots and dissolution of feldspar and carbonate minerals and formation of new mineral phases, mostly clays and salts. These are corroborated by EDS elemental analyses which show decreased elemental compositions. The implications of reactions mentioned above include but not limited to, scale formation, clay fines migration and shale softening all of which pose significant permeability impairment on formation over time. INTRODUCTION Shale reservoirs account for a large share of unconventional reservoirs in the world (Lyu et al., 2015). However, ultra-low permeability and high clay compositions pose significant challenges when producing from these reservoirs (Dawuda and Srinivasan, 2022, 2023). Producing from these reservoirs therefore requires horizontal drilling and hydraulic fracturing technologies which have proven their efficacy in generating substantial permeability in reservoirs to ensure production (Fujian et al., 2019; Liu et al., 2018). Even after expensive horizontal drilling and hydraulic fracturing, geochemical reactions between engineered fluids and formation leads to fracture constriction and adversely impact petrophysical properties (permeability and porosity) of the reservoir. These technologies are therefore under constant development and improvement in various aspects to ensure fine tuning for specific reservoirs. Under present conditions, much of the hydrocarbon reserves in unconventional shale reservoirs are left unproduced due to rapid decline in permeability following resumption to production after hydraulic fracturing. It is therefore essential to understand the range of geochemical reactions that cause rapid depletion of permeability after hydraulic fracturing and apply these to each shale reservoir to ensure substantial recovery rates.
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Akinyose, Olusegun, Tariq Alshaikhmubarak, Marie Van Steene y Laurent Mosse. "Quantifying the Effects of Heavy Minerals on Thermal Neutron Porosity in Permo-Carboniferous Sandstone". En 2022 SPWLA 63rd Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2022. http://dx.doi.org/10.30632/spwla-2022-0116.
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Recent studies document the presence of rare earth elements and heavy minerals in Permo-Carboniferous sandstones of the Arabian Peninsula. The studies establish that the measure of the gadolinium concentration and the formation capture cross-section (sigma) are both good proxies for the rare earth elements and heavy minerals. The objective of this study is to assess, quantify and then correct for the effect of these rare earth elements on the thermal neutron porosity measurement. Thermal and epithermal neutron porosity datasets were acquired in wells intersecting the Permo-Carboniferous sandstone. Relevant environmental corrections were applied to the data except for the formation water salinity correction. The hydrogen index values are obtained from the thermal neutron porosity measurement using corrections incorporating the measured sigma from the gamma ray spectroscopy tool and the formation bulk density. The measured sigma provides a measure of the water salinity in the flushed zone that is used to account for salinity effects on the thermal neutron porosity. The measured sigma also senses the effect of the heavy matrix minerals whose neutron capture cross-section is very high. The bulk density provides the required input to perform a density correction on the thermal neutron porosity. The hydrogen index that results from the measured sigma and formation density corrections to the thermal neutron porosity is referenced to the epithermal neutron porosity for these Permo-Carboniferous sandstones. When shale is present, the computed hydrogen index shows small discrepancies from the epithermal neutron porosity. These discrepancies are due to minor remaining density effects on the epithermal neutron porosity. In clay free reservoir intervals and in zones with moderate gadolinium content, the matrix-corrected hydrogen index is essentially identical to the matrix-corrected epithermal neutron porosity. The corrections from the thermal neutron porosity to the hydrogen index amount to 1.5-2.0 pu in the clay free sands. Applying this process to another well, additionally shows a good agreement between the matrix-corrected hydrogen index and the hydrogen index from the nuclear magnetic resonance. A third and final well application illustrates the extreme effect that the presence of rare earth elements can have on the conventional thermal neutron porosity, with negative corrections up to 5 pu to obtain the hydrogen index. Implementing a practical correction process to the thermal neutron porosity for the rare earth element bearing Permo-Carboniferous sandstones; this work quantifies the effects that rare earth elements have on the thermal neutron porosity measurements for the first time.
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Karlsen, Kjetil André. "An Efficient 1st Order Stress Hysteresis Model for Helically Laid Rectangular Elements in Power Cables and Umbilicals". En ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-78139.
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Abstract It is essential to calculate the mechanical stress efficiently in power cables, umbilicals and hybrids to reduce the risk of failure and halts during production, transportation, installation and operation phases. The global analysis, where these conditions are simulated, can under certain circumstances produce a very large volume of data, which often needs to be processed into a specific format or transformed into a result. This paper describes a model for helically laid rectangular elements, that efficiently process large data volumes into 1st order stress. The hysteresis model applies the results from the global analysis as input, together with stress parameters from local FEA, element dimensions and material properties. As it is positioned as a link between the global and local analysis, it calculates the stress in time domain, which can either be used directly or processed further. A case study is also being presented in this paper where time domain results from the 1st order stress model are first run through a rainflow counting algorithm, which extracts all the ranges and their associated cycles. These ranges are afterward measured against the element’s SN curve, followed by a Palmgren-Miner summation to give an estimate of the local fatigue damage. The model has through this study shown to give an improved fatigue life compared to an alternative 1st order technique used in the past and is found highly efficient compared to its complexity.
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Kirmaci, A., D. Guner, K. Karadeniz y T. Sherizadeh. "Distinct Element Analysis of Various Structural Element Responses for Coal Rib Support Simulation". En 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0782.
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ABSTRACT Understanding the bolt responses for the efficacy of bolt performance during coal rib support applications plays a key role in controlling the stability of underground coal mine openings. Conducting pull-out tests is imperative to gain a better understanding of these responses. Field conditions such as block volume and degree of cleating may significantly impact bolt performance. These field conditions can be efficiently implemented in numerical modeling approaches, and selecting a proper structural element type for these numerical studies is crucial. This study developed a pull-out test model and compared the performance of structural elements as support members in the coal rib model using 3DEC, a three-dimensional distinct element-based numerical modeling code. This study covered commonly utilized cable, pile, and hybrid structural elements in rib models with explicitly introduced face cleats. The bolt response of numerical models was calibrated with the field data showing the load-displacement response of a pull-out test. Comparing the rib models with these structural elements showed that hybrid structural elements demonstrated better agreement with the field observation as they can simulate the reaction to shearing along the discontinuities by inducing bending stresses. The impact of support density on rib stability is also presented in this study. INTRODUCTION The fact that injuries and fatalities linked to rib failure persist in underground coal mines, despite measures taken to ensure rib stability emphasizes the urgent need to develop and validate support systems that can effectively reduce coal rib failures. Currently, there is no standard practice for coal rib supports that can effectively address the diverse range of conditions encountered in coal mines across the United States (Guner et al., 2023). That leaves mine operators with no option but to rely on trial-and-error or industrial legacy practices. The severity of rib instabilities as a ground control hazard in underground coal mines is highlighted by the average annual fatality rate caused by coal rib failures, which remained at 1.6 between 2009 and 2022, as reported by MSHA (2022). Although coal rib failures pose a significant risk to the safety of the miners, there is limited information on these events and how rib support can mitigate them. Therefore, conducting studies to analyze the current rib support strategies and reduce injuries and fatalities resulting from rib failures in the coal mining industry is essential.
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Blebea, Nicoleta Mirela. "NUTRITIONAL THERAPY IN CLINICAL MANAGEMENT OF ONCOLOGICAL PATIENTS". En NORDSCI Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/nordsci2021/b1/v4/28.
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Nutritional therapy helps patients with cancer to maintain their weight within normal limits, maintain tissue integrity and reduce the side effects of cancer therapies. Nutritional oncology deals with both prevention and patient support during treatment, in convalescence and in palliative situations. Cancer patients need full support from the team of health professionals (oncologists, nurses and dietitians). The following basic elements should not be missing from the cancer patient's diet: water, protein intake, animal and vegetable fats, as well as vitamins and minerals. The diet of cancer patients should be closely monitored, as body weight should be kept within normal limits, ie a body mass index (BMI) between 19 and 24 (the calculation is made by dividing the weight by the square of the height). The oncologist should therefore be aware of the adverse effects of malnutrition on patient outcomes and view nutritional support as an essential component of the clinical management, chemotherapy, radiation therapy, antiemetic treatment, and treatment for pain.
Informes sobre el tema "Essential mineral elements"
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de Caritat, Patrice, Brent McInnes y Stephen Rowins. Towards a heavy mineral map of the Australian continent: a feasibility study. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.031.
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Heavy minerals (HMs) are minerals with a specific gravity greater than 2.9 g/cm3. They are commonly highly resistant to physical and chemical weathering, and therefore persist in sediments as lasting indicators of the (former) presence of the rocks they formed in. The presence/absence of certain HMs, their associations with other HMs, their concentration levels, and the geochemical patterns they form in maps or 3D models can be indicative of geological processes that contributed to their formation. Furthermore trace element and isotopic analyses of HMs have been used to vector to mineralisation or constrain timing of geological processes. The positive role of HMs in mineral exploration is well established in other countries, but comparatively little understood in Australia. Here we present the results of a pilot project that was designed to establish, test and assess a workflow to produce a HM map (or atlas of maps) and dataset for Australia. This would represent a critical step in the ability to detect anomalous HM patterns as it would establish the background HM characteristics (i.e., unrelated to mineralisation). Further the extremely rich dataset produced would be a valuable input into any future machine learning/big data-based prospectivity analysis. The pilot project consisted in selecting ten sites from the National Geochemical Survey of Australia (NGSA) and separating and analysing the HM contents from the 75-430 µm grain-size fraction of the top (0-10 cm depth) sediment samples. A workflow was established and tested based on the density separation of the HM-rich phase by combining a shake table and the use of dense liquids. The automated mineralogy quantification was performed on a TESCAN® Integrated Mineral Analyser (TIMA) that identified and mapped thousands of grains in a matter of minutes for each sample. The results indicated that: (1) the NGSA samples are appropriate for HM analysis; (2) over 40 HMs were effectively identified and quantified using TIMA automated quantitative mineralogy; (3) the resultant HMs’ mineralogy is consistent with the samples’ bulk geochemistry and regional geological setting; and (4) the HM makeup of the NGSA samples varied across the country, as shown by the mineral mounts and preliminary maps. Based on these observations, HM mapping of the continent using NGSA samples will likely result in coherent and interpretable geological patterns relating to bedrock lithology, metamorphic grade, degree of alteration and mineralisation. It could assist in geological investigations especially where outcrop is minimal, challenging to correctly attribute due to extensive weathering, or simply difficult to access. It is believed that a continental-scale HM atlas for Australia could assist in derisking mineral exploration and lead to investment, e.g., via tenement uptake, exploration, discovery and ultimately exploitation. As some HMs are hosts for technology critical elements such as rare earth elements, their systematic and internally consistent quantification and mapping could lead to resource discovery essential for a more sustainable, lower-carbon economy.
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McLemore, Virginia T., Nels Iverson, Snir Woodard, Haley Dietz, Evan Owen, Ethan B. Haft, Tristan Childress, Amy Trivitt y Richard Kelley. Geology and Mineral Deposits of the Cornudas Mountains, Otero County, New Mexico. New Mexico Bureau of Geology and Mineral Resources, 2022. http://dx.doi.org/10.58799/ofr-619.
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Re-examination of the rare earth elements (REE) deposits in the Cornudas Mountains is warranted in light of today's economic importance of critical minerals, including REE that are essential in most of our electronic devices. New mapping, petrography, 40Ar/39Ar geochronology, and geochemical analyses have provided a better understanding of the emplacement of these intrusions and associated mineral deposits. The Cornudas Mountains form the northern Trans-Pecos alkaline magmatic province in the southern part of the North American Cordilleran alkaline-igneous belt. The igneous rocks in the Cornudas Mountains were emplaced in two pulses at 37.14-34.5 and 32.48-26.95 Ma, just prior to or during the early phases of Rio Grande rift extension, and consist of 1) larger nepheline syenite-syenite laccoliths and plugs, 2) phonolite plugs, sills, and dikes, 3) smaller syenite plugs and dikes that intrude Permian and Cretaceous sedimentary rocks, and 4) volcanic breccia dikes. New USGS geophysical data indicate that some of these intrusions extend deep into the subsurface, with additional buried intrusions potentially at depth. The focus of REE exploration is along the lower unit (PEnsp2) of the Wind Mountain nepheline syenite laccolith, as well as within syenite-phonolite and volcanic breccia dikes, plugs and skarns and carbonate-replacement deposits in Chess Draw. Some samples contain as much as 3110 ppm total REE. REE could be leached from a mineral concentrate of the REE-bearing minerals (eudialyte, zircon, monazite, bastnasite, calcio-catapleiite, vitusite, roumaite, xenotime). We incorporate whole rock and clinopyroxene chemistry of each intrusion into the clinopyroxene-liquid geothermobarometer (Masotta, 2013) to determine the temperatures and pressures of emplacement. This thermometer provides higher crystallization temperature estimates for the syenite intrusions (857-1027 deg. C) than the phonolite sills (760-869 deg. C). We then use the barometric estimates (0.3-3.3 kbar) to calculate emplacement depths (1.2-12.3 km). Pairing these depths with the new geochronology, minimum exhumation rates for intrusions in the Cornudas Mountains are estimated that range from 0.04-0.34 mm/yr crystallization temperatures and exhumation rates provide additional information to aid in developing a model for the formation of REE deposits.