15 results on '"Essential mineral elements"'
Search Results
2. Elemental profiles in distant tissues during tumor progression
- Author
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Samella Salles, Rebecca Salles, Mauro S. G. Pavão, Simone C. Cardoso, and Mariana P. Stelling
- Subjects
Tumor progression ,Essential mineral elements ,Lewis lung carcinoma ,Elemental distribution ,SR-XRF ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Essential elements have functions in tumor progression by promoting protumoral cellular processes, such as proliferation, and migration, among others. Obtaining an understanding of how these elements relate to tumor progression processes is of great importance for research. Elemental profile studies in distant tissues, which can be modulated by tumor cells to promote metastasis, have not been sufficiently investigated. The main goal of this study is to evaluate multielemental distribution during tumor progression, focusing on tumor tissue and distant tissues that may be affected. Methods Tumor progression in vivo was simulated by inoculating C57BL/6 mice with Lewis Lung Carcinoma (LLC) cells. Samples of the primary tumor and distant tissues were collected during 5 weeks of tumor progression for the control and experimental (tumor-bearing) groups. The biological samples were analyzed using the synchrotron radiation X-Ray fluorescence technique. Data on the concentration of P, S, K, Ca, Mn, Fe, Cu, and Zn in the samples were obtained and statistically analyzed to evaluate the distribution of the elements during tumor progression in the primary tumor as well as distant tissues. Results It was possible to observe significant changes in the concentrations’ distribution of P, S, K, Ca, Mn, Fe, and Cu in distant tissues caused by the presence of tumor cells. It was also possible to detect a greater similarity between tumor tissue (which has the lung as tissue of origin) and a tissue of non-origin, such as the liver, which is an unprecedented result. Moreover, changes in the distributions of concentrations were detected and studied over time for the different tissues analyzed, such as primary tumor, liver and lung, in Control and Tumor groups. Conclusions Among other results, this paper could explore the modulation of distant tissues caused by the presence of a primary tumor. This could be achieved by the evaluation of several elements of known biological importance allowing the study of different biological processes involved in cancer. The role of essential elements as modulators of the tumor microenvironment is a relevant aspect of tumor progression and this work is a contribution to the field of tumoral metallomics.
- Published
- 2023
- Full Text
- View/download PDF
3. Elemental profiles in distant tissues during tumor progression.
- Author
-
Salles, Samella, Salles, Rebecca, Pavão, Mauro S. G., Cardoso, Simone C., and Stelling, Mariana P.
- Abstract
Background: Essential elements have functions in tumor progression by promoting protumoral cellular processes, such as proliferation, and migration, among others. Obtaining an understanding of how these elements relate to tumor progression processes is of great importance for research. Elemental profile studies in distant tissues, which can be modulated by tumor cells to promote metastasis, have not been sufficiently investigated. The main goal of this study is to evaluate multielemental distribution during tumor progression, focusing on tumor tissue and distant tissues that may be affected. Methods: Tumor progression in vivo was simulated by inoculating C57BL/6 mice with Lewis Lung Carcinoma (LLC) cells. Samples of the primary tumor and distant tissues were collected during 5 weeks of tumor progression for the control and experimental (tumor-bearing) groups. The biological samples were analyzed using the synchrotron radiation X-Ray fluorescence technique. Data on the concentration of P, S, K, Ca, Mn, Fe, Cu, and Zn in the samples were obtained and statistically analyzed to evaluate the distribution of the elements during tumor progression in the primary tumor as well as distant tissues. Results: It was possible to observe significant changes in the concentrations’ distribution of P, S, K, Ca, Mn, Fe, and Cu in distant tissues caused by the presence of tumor cells. It was also possible to detect a greater similarity between tumor tissue (which has the lung as tissue of origin) and a tissue of non-origin, such as the liver, which is an unprecedented result. Moreover, changes in the distributions of concentrations were detected and studied over time for the different tissues analyzed, such as primary tumor, liver and lung, in Control and Tumor groups. Conclusions: Among other results, this paper could explore the modulation of distant tissues caused by the presence of a primary tumor. This could be achieved by the evaluation of several elements of known biological importance allowing the study of different biological processes involved in cancer. The role of essential elements as modulators of the tumor microenvironment is a relevant aspect of tumor progression and this work is a contribution to the field of tumoral metallomics. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
4. Essential Mineral Elements and Potentially Toxic Elements in Orange-Fleshed Sweet Potato Cultivated in Northern Ethiopia.
- Author
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Lamaro, Gloria Peace, Tsehaye, Yemane, Girma, Atkilt, Vannini, Andrea, Fedeli, Riccardo, and Loppi, Stefano
- Subjects
- *
SWEET potatoes , *POISONS , *NUTRITIONAL requirements , *GENOTYPE-environment interaction , *MINERALS , *SOIL mineralogy - Abstract
Simple Summary: This study aimed to investigate 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 required daily allowance, and the potential risk to human health from the accumulation of potentially toxic elements in the tuberous roots. The results showed consistent interspecific variability as well as important and significant intraspecific differences, which could depend on genotype and environment. Four of the five investigated genotypes 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. For all the genotypes, no health risks associated with their consumption emerged for Cr, As, and Pb, but Al, Cd, Cu, Fe, Mn and Ni is > 1 showed evidence of greater health risk, especially in children. 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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
5. POTENTIAL OF MILLED AMARANTH GRAIN PRODUCTS IN PROVIDING FOOD WITH ESSENTIAL MINERAL ELEMENTS.
- Author
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MYKOLENKO, Svitlana, SYTNYK, Svitlana, BOJŇANSKÁ, Tatiana, IVANIŠOVÁ, Eva, JANKO, Ivona, and HRICOVÁ, Andrea
- Subjects
- *
CEREAL products , *FLOUR , *GRAIN , *AMARANTHS , *NUTRITIONAL value , *COPPER , *MINERALS - Abstract
Amaranth grain is a promising pseudocereal, and milled amaranth grain products as ingredients may improve the nutritional value of food products. Twenty amaranth products from different Ukrainian varieties such as Kharkivs'kyi-1, Liera, Sem (Amaranthus hypochondriacus L.), Ultra (Amaranthus hybridus L.), and different milled fractions (flour, middling, coarse seed coat, and fine seed coat) were analysed in this study. Amaranth whole grain has 2-3- and 20-fold content of manganese, iron, copper, zinc, and calcium respectively in comparison to wheat. Flour fractions of the amaranth grain presented a reduced content of magnesium, potassium, calcium, manganese, and iron compared to their content in the whole grain. Studied amaranth grain and the milled products of different varieties revealed a significant (p>0.05) positive (0.47...0.90) correlation between all analysed essential minerals, except molybdenum, which demonstrated 0.46...0.56 correlations with calcium, zinc, potassium, iron, and copper. Milled amaranth grain products such as ingredients in bread, pasta, or cookies formulations at 10...50% substitution of wheat flour, might fulfil the daily requirements in magnesium, manganese, iron, copper, and molybdenum enhancing the nutrition value of the products. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
6. Essential Mineral Elements and Potentially Toxic Elements in Orange-Fleshed Sweet Potato Cultivated in Northern Ethiopia
- Author
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Gloria Peace Lamaro, Yemane Tsehaye, Atkilt Girma, Andrea Vannini, Riccardo Fedeli, and Stefano Loppi
- Subjects
recommended dietary allowance ,health risks ,essential mineral elements ,orange-fleshed sweetpotato ,potentially toxic elements ,Biology (General) ,QH301-705.5 - Abstract
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.
- Published
- 2023
- Full Text
- View/download PDF
7. Does molybdenum and cobalt foliar spray mitigate nitrate starvation and ammonium deprivation stress?
- Author
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Rodrigo Antonio Nuncio Junior, Daniel Baron, and Iuri Emmanuel de Paula Ferreira
- Subjects
abiotic stress ,beneficial mineral elements ,essential mineral elements ,hydroponic ,passiflora ,plant nutrition ,Plant culture ,SB1-1110 - Abstract
Abstract Knowledge about the nutritional balance at the initial phenological stage is mandatory to overcome limitations on nutritional availabilities required by the plant species. However, little is elucidated about nitrate (NO3-) and ammonium (NH4+) deprivation stress. Our hypothesis tested is that there are benefits of the foliar application (spray) of molybdenum (Mo) and cobalt (Co) under different availabilities (ionic strength, IS) from the presence of nitric sources (CaNO32-) and absence of ammonium (NH4H2PO4) in root application (hydroponic cultivation) at the initial phenological growth stage. Nutrient supply was carried out with a nutrient solution, which is deprived of NH4+. Treatments were 25%, 50%, and 100% IS, supplied via hydroponic cultivation, combined with the absence/presence of Co/Mo spray. Plants were randomly distributed into 17 blocks (replicates) with 6 treatments conducted in a factorial scheme and data were analyzed by ANOVA and ANCOVA. We observed that Co/Mo spray diminished plant growth discrepancies between treatments at different IS’s. In addition, contents of photosynthetic pigments were higher at 25% IS without Co/Mo spray. Thus, we concluded that Mo and Co spray can alleviate NO3- starvation/NH4+ deprivation stress during the initial growth phenological stages of yellow passion fruits.
- Published
- 2021
- Full Text
- View/download PDF
8. Multi‐element characterisation of carob, fig and almond liqueurs by MP‐AES.
- Author
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Rodríguez‐Solana, Raquel, Carlier, Jorge Dias, Costa, Maria Clara, and Romano, Anabela
- Subjects
- *
TRACE metals , *CAROB , *HYDROGEN peroxide , *MINERALIZATION , *PRINCIPAL components analysis - Abstract
Carob pod, fig and almond liqueurs are produced in various Mediterranean regions. This work reports the mineral content of these traditional beverages and evaluates the influence of the raw material. Twenty‐five fruit liqueurs from 16 producers were analysed. A simple open‐vessel sample mineralization by wet digestion using nitric acid–hydrogen peroxide (1:1) was used before spectrometric analysis. Nine essential elements (Cu, Ca, Mg, Na, K, Fe, Zn, Mn and P) and two non‐essentials (Cd and Pb) were quantified by microwave plasma–atomic emission spectrometry (MP‐AES). Carob liqueur presented the broader profile of minerals and was the only fruit liqueur containing iron (72.7% of samples), phosphorous, manganese and low levels of lead (in two of the 11 samples). Conversely, almond liqueurs contained the lowest mineral content with only five elements detected. Fruit liqueurs showed variability in mineral content even within the same liqueur, presumably as a consequence of the different manufacturing processes. Despite this variability, application of principal component analysis to essential mineral concentrations (K, Na, Ca, Mg, Mn, Fe and Zn) resulted in satisfactory classification (PC1 and PC2 accounting for 78.5% of the total variance) of the Portuguese liqueurs evaluated. Copyright © 2018 The Institute of Brewing & Distilling [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
9. 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.
- Author
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Sullivan KV, Moore RET, and Vanhaecke F
- Subjects
- Animals, Humans, Metals, Minerals, Life Style, Human Body, Isotopes
- Abstract
In the last 20 years, the application of high-precision isotopic analysis of essential mineral elements (Mg, K, Ca, Fe, Cu, and Zn) to biomedicine (sometimes referred to as isotope metallomics) has revealed that their stable isotopic compositions are altered by the metal dysregulation that is fundamental to the pathogenesis of many cancers and other diseases. Despite many published works showing the diagnostic and prognostic potential of this approach, a number of factors that may influence the stable isotopic composition of these essential mineral elements in healthy individuals remain unstudied. In this perspective article, we summarize the available evidence from trophic level studies, animal models, and ancient and modern humans, relating to physiological and lifestyle factors that appear likely (there is evidence indicating their influence) or unlikely (there is evidence indicating their lack of influence) to require controlling for when investigating variations in essential mineral element isotopic compositions in human subjects. We also discuss factors that require additional data to properly assess. There is evidence that sex, menopausal status, age, diet, vitamin and metal supplementation, genetic variation, and obesity influence the isotopic composition of at least one essential mineral element in the human body. The task of investigating potential influences on essential mineral element isotopic compositions in the human body is sizeable, but presents an exciting research opportunity, with each incremental advance helping to improve the quality of research output in the context of isotope metallomics., (© The Author(s) 2023. Published by Oxford University Press.)
- Published
- 2023
- Full Text
- View/download PDF
10. Aplicação foliar de cobalto e molibdênio mitiga a privação de nitrato e ausência de amônio?
- Author
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Rodrigo Antonio Nuncio Junior, Daniel Baron, and Iuri Emmanuel de Paula Ferreira
- Subjects
inorganic chemicals ,abiotic stress ,chemistry.chemical_element ,nutrição vegetal ,plant nutrition ,Plant Science ,Photosynthesis ,SB1-1110 ,Passiflora ,chemistry.chemical_compound ,Nutrient ,estresse abiótico ,essential mineral elements ,Nitrate ,elementos minerais essenciais ,hidroponia ,Ammonium ,biology ,Plant culture ,food and beverages ,biology.organism_classification ,hydroponic ,elementos minerais benéficos ,Horticulture ,passiflora ,chemistry ,beneficial mineral elements ,Molybdenum ,Agronomy and Crop Science ,Cobalt ,Plant nutrition ,Food Science - Abstract
Knowledge about the nutritional balance at the initial phenological stage is mandatory to overcome limitations on nutritional availabilities required by the plant species. However, little is elucidated about nitrate (NO3-) and ammonium (NH4+) deprivation stress. Our hypothesis tested is that there are benefits of the foliar application (spray) of molybdenum (Mo) and cobalt (Co) under different availabilities (ionic strength, IS) from the presence of nitric sources (CaNO32-) and absence of ammonium (NH4H2PO4) in root application (hydroponic cultivation) at the initial phenological growth stage. Nutrient supply was carried out with a nutrient solution, which is deprived of NH4+. Treatments were 25%, 50%, and 100% IS, supplied via hydroponic cultivation, combined with the absence/presence of Co/Mo spray. Plants were randomly distributed into 17 blocks (replicates) with 6 treatments conducted in a factorial scheme and data were analyzed by ANOVA and ANCOVA. We observed that Co/Mo spray diminished plant growth discrepancies between treatments at different IS’s. In addition, contents of photosynthetic pigments were higher at 25% IS without Co/Mo spray. Thus, we concluded that Mo and Co spray can alleviate NO3- starvation/NH4+ deprivation stress during the initial growth phenological stages of yellow passion fruits. Resumo O conhecimento do balanço nutricional na fase fenológica inicial é crucial para contornar as limitações das disponibilidades nutricionais exigidas por espécies vegetais. No entanto, pouco é sabido sobre o estresse de privação de nitrato (NO3-) e ausência de amônio (NH4+). Nossa hipótese testou se há benefícios da aplicação foliar (spray) de molibdênio (Mo) e cobalto (Co) em diferentes disponibilidades (força iônica, IS), a partir da presença restrita de N em fontes nítricas (CaNO32-) e ausência de N em formas amoniacais (NH4H2PO4), por aplicação radicular (cultivo hidropônico), na fase fenológica de crescimento inicial. Nutrientes foram fornecidos usando solução nutritiva, desprovida de NH4+. Os tratamentos empregados foram 25%, 50% e 100% IS, fornecidos via cultivo hidropônico, combinados com ausência / presença de pulverização de Co/Mo. As plantas foram distribuídas ao acaso, em 17 blocos (repetições), com 6 tratamentos conduzidos em esquema fatorial, e os dados foram analisados por ANOVA e ANCOVA. Observou-se que a pulverização de Co/Mo diminuiu as discrepâncias entre o crescimento da planta em diferentes ISs. Além disso, os conteúdos de pigmentos fotossintéticos foram maiores que 25% IS sem pulverização de Co/Mo. Assim, concluiu-se que a pulverização foliar de Mo e Co pode aliviar o estresse de privação de NO3- /ausência de NH4+ durante os estágios fenológicos de crescimento inicial do maracujá-amarelo.
- Published
- 2021
11. Variabilité spatio-temporelle et expérimentale de la valeur fonctionnelle de cinq plantes halophytes de Nouvelle-Calédonie, candidates à l’agriculture biosaline
- Author
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Certain, Cassandre and Baret, Marguerite
- Subjects
Economies d' eau douce et de terres arables ,[SDV.SA.AGRO] Life Sciences [q-bio]/Agricultural sciences/Agronomy ,Functional value ,Variabilité environnementale ,Éléments minéraux essentiels ,Antioxydants ,Cultures halophiles -- Aspect environnemental -- Nouvelle-Calédonie ,Plantes -- Effets du sel -- Nouvelle-Calédonie ,Cultures halophiles -- Aspect physiologique -- Nouvelle-Calédonie ,[SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics ,Savings of fresh water and arable land ,Environmental variability ,Halophytes -- utilisation -- Nouvelle-Calédonie ,Acides gras ,Halophytes ,Halophytes -- Emploi en cosmétologie -- Nouvelle-Calédonie ,Essential mineral elements ,Agriculture biosaline ,Valeur fonctionnelle ,Fatty acids - Abstract
The 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., 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’agriculture.
- Published
- 2021
12. Variabilit�� spatio-temporelle et exp��rimentale de la valeur fonctionnelle de cinq plantes halophytes de Nouvelle-Cal��donie, candidates �� l���agriculture biosaline
- Author
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Certain, Cassandre
- Subjects
Economies d' eau douce et de terres arables ,Cultures halophiles -- Aspect physiologique -- Nouvelle-Cal��donie ,Functional value ,631.45 ,Variabilit�� environnementale ,Antioxydants ,Biosaline agriculture ,Cultures halophiles -- Aspect environnemental -- Nouvelle-Cal��donie ,Antioxidants ,572.46 ,Savings of fresh water and arable land ,Environmental variability ,Acides gras ,Halophytes ,571.2 ,Essential mineral elements ,Plantes -- Effets du sel -- Nouvelle-Cal��donie ,Agriculture biosaline ,Valeur fonctionnelle ,Fatty acids ,Halophytes -- utilisation -- Nouvelle-Cal��donie ,Halophytes -- Emploi en cosm��tologie -- Nouvelle-Cal��donie ,631.584 ,��l��ments min��raux essentiels - Abstract
La diminution globale des ressources en eau douce et en terres arables non salinis��es �� travers le monde a conduit �� l���essor mondial de cultures biosalines, �� partir de plantes �� halophytes �� capables de cro��tre et de se multiplier sous de fortes concentrations en sel. Parmi les esp��ces halophytes candidates �� ce type de productions biosalines en Nouvelle-Cal��donie, cinq esp��ces ont ��t�� s��lectionn��es sur la base du potentiel retrouv�� 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 cosm��tique, des bio��nergies ou encore de la restauration ��cologique. Parmi ces applications, la production de l��gumes biosalins fonctionnels (riches en m��tabolites fonctionnels d���int��r��t) est en recrudescence au niveau mondial. Le monde scientifique a en effet clairement ��tabli un lien entre la tol��rance au sel et la richesse des plantes halophytes en plusieurs m��tabolites fonctionnels d���int��r��t (tels que les acides gras polyinsatur��s ou les antioxydants).N��anmoins, les valeurs fonctionnelles des plantes halophytes sont suppos��es variables et dict��es par leurs r��ponses aux variabilit��s de l���environnement (tol��rance au sel, nutrition, etc.). L�����tude de telles relations est indispensable �� l�����tablissement du potentiel agronomique local d���esp��ces d���int��r��t telles que celles s��lectionn��es.Ceci a ��t�� l���objet du pr��sent travail de th��se. Il a eu pour but d�����valuer le potentiel de chacune des esp��ces en tant que source de compos��s fonctionnels mais aussi d�����valuer leurs variabilit��s selon les modifications, naturelles ou contr��l��es de l���environnement. A ce titre, il montre que les tissus comestibles de ces cinq esp��ces ont des valeurs fonctionnelles ��lev��es en min��raux essentiels, acides gras polyinsatur��s et/ou antioxydants en comparaison avec plusieurs normes di��t��tiques et l��gumes fonctionnels d���int��r��t. Il montre ��galement des relations entre les compositions en acides gras et en ��l��ments essentiels des esp��ces et les caract��ristiques 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 esp��ces et diff��rents traitements exp��rimentaux appliqu��s en serre, combinant salinit�� et nutrition azot��e sous diff��rentes formes. A terme, ces diff��rents r��sultats pourront contribuer �� l�����mergence de cultures biosalines exp��rimentales �� plus large ��chelle en Nouvelle-Cal��donie et �� des pr��conisations 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���agriculture., The 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.
- Published
- 2021
- Full Text
- View/download PDF
13. Toxic and Essential Mineral Elements Content of Black Tea Leaves and Their Tea Infusions Consumed in Iran.
- Author
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Salahinejad, Maryam and Aflaki, Fereydoon
- Abstract
The metal contents of eleven black tea samples, four cultivated in Iran and seven imported, and their tea infusions were determined. Twelve elements consisting toxic metals (Al, As, Pb, Cr, Cd, and Ni) and essential mineral elements (Fe, Zn, Cu, Mn, Ca, and Mg) were analyzed using inductively coupled plasma atomic emission spectroscopy (ICP-AES). Al, Ca, µg, and Mn ranged in black tea leaves at mg g
-1 levels, while Cr, Fe, Ni, Cu, Zn were at µg g-1 levels. Analysis of variance showed no statistically significant differences among most elements determined in cultivated and imported black teas in Iran except for Ni and Cu. The extraction efficiency of each element into tea infusions was evaluated. The solubility of measured metals in infusion extracts varied widely and ranged from 0 to 59.3%. Among the studied elements, Cr, Pb, and Cd showed the lowest rates of solubility and Ni had the highest rates of solubility. The amount of toxic metals and essential mineral elements that one may take up through consumption of black tea infusion was estimated. The amount of realizing each element into tea infusions and acceptable daily intake, for safety consumption of black tea, was compared. [ABSTRACT FROM AUTHOR]- Published
- 2010
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14. Multi-element characterisation of carob, fig and almond liqueurs by MP-AES
- Author
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Rodríguez Solana, Raquel, Dias Carlier, Jorge, Clara Costa, Maria, and Romano, Anabela
- Subjects
Dieta mediterrânica ,Liqueurs ,MP-AES ,Essential mineral elements ,Toxic metals - Abstract
Carob pod, fig and almond liqueurs are produced in various Mediterranean regions. This work reports the mineral content of these traditional beverages and evaluates the influence of the raw material. Twenty-five fruit liqueurs from 16 producers were analysed. A simple open-vessel sample mineralization by wet digestion using nitric acid-hydrogen peroxide (1:1) was used before spectrometric analysis. Nine essential elements (Cu, Ca, Mg, Na, K, Fe, Zn, Mn and P) and two non-essentials (Cd and Pb) were quantified by microwave plasma-atomic emission spectrometry (MP-AES). Carob liqueur presented the broader profile of minerals and was the only fruit liqueur containing iron (72.7% of samples), phosphorous, manganese and low levels of lead (in two of the 11 samples). Conversely, almond liqueurs contained the lowest mineral content with only five elements detected. Fruit liqueurs showed variability in mineral content even within the same liqueur, presumably as a consequence of the different manufacturing processes. Despite this variability, application of principal component analysis to essential mineral concentrations (K, Na, Ca, Mg, Mn, Fe and Zn) resulted in satisfactory classification (PC1 and PC2 accounting for 78.5% of the total variance) of the Portuguese liqueurs evaluated. SFRH/BPD/103086/2014 info:eu-repo/semantics/publishedVersion
- Published
- 2018
15. Effects of nitrogen nutrition upon the quality and yield of head chicory (Cichorium intybus var. foliosum L.)
- Author
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Herak Ćustić, Mirjana, Toth, Nina, and Poljak, Milan
- Subjects
proteins ,vitamins ,essential mineral elements - Abstract
Influence of nitrogen fertilisation upon the quality and yield of head chicory (Cichorium intybus L. var. foliosum) was investigated in several years long field trials involving eight fertilising variants. Investigation results indicate that nitrogen application influenced the differences in the contents of dry matter (4, 23 - 5, 30 %), plant nitrogen (3, 33 - 4, 95 % N) and crude proteins (N x 6, 25). Dry matter phosphorus ranged between 1, 20 and 2, 11 % P205 while values from 4, 25 to 5, 68 % K20 were determined for potassium. Chicory yields varied from 1, 29 to 2, 6 kg/m2. Head chicory quality, that is its overall nutritional value, was estimated relative to the quantity of essential mineral elements (calcium, magnesium, iron, zinc and copper) as well as some vitamins and essential amino acids. Red head chicory contains a particularly favourable quantity of calcium (20 mg Ca) and iron (1, 5 mg Fe) in 100 g in fresh weight (F.W.). As regards vitamins, 14, 06 mg of vitamin C and 0, 42 mg of carotene were determined in 100 g of F.W.. A very high content of some essential amino acids, especially methionine, was recorded.
- Published
- 2000
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