Selenium uptake and species distribution in peas after foliar treatment with selenate

Selenium fertilization of plants has been used to increase the nutritional selenium levels in humans and animals. The speciation of selenium in samples is necessary to understand selenium mobility, uptake and toxicity. The aim of this work was to check the ability of peas to accumulate Se by hydride generation atomic fluorescence spectrometry (HG-AFS) and to identify the selenium species in peas seeds by high performance liquid chromatography-UV photochemical digestion-hydride generation atomic fluorescence spectrometry (HPLC-UV-HG-AFS) using selenomethionine, selenocystine, selenate, selenite and Se-methylselenocysteine standards. In this study pea (Pisum sativum L.) was treated once or twice by spraying leaves with a water solution containing 15 mg Se/L in the form of sodium selenate at flowering time. The average total Se content in seeds was 21 ± 2, 383 ± 19 and 743 ± 37 ng g-1 in nontreated and once and twice foliarly treated plants, respectively. After water extraction 32 ± 3 % of Se was in soluble form and no selenium species were found in extracts under found optimal conditions of HPLC-UVHG- AFS. After enzymatic hydrolysis 92 % of Se was soluble in seeds and a great part of added Se (VI) was converted to selenomethionine representing 49 and 67 % in once and twice treated plants, according to the total Se content. The other part of soluble selenium in supernatants after enzymatic hydrolysis was not detected.vokMyynti MTT Tietopalvelut 31600 Jokioine

Hydrogeochemistry of Alpine springs from North Slovenia: Insights from stable isotopes

Springwater chemistry and carbon cycling in our study mainly depend on geological composition of the aquifer. The investigated Alpine springs in Slovenia represent waters strongly influenced by chemicalweathering ofMesozoic limestone and dolomite, only one spring was located in Permo-Carboniferous shales. The carbon isotopic composition of dissolved inorganic carbon (DIC) and suspended organic carbon (POC) as well as major solute concentrations yielded insights into the origin of carbon in Alpine spring waters. The major solute composition was dominated by carbonic acid dissolution of calcite. Waters were generally close to saturation with respect to calcite, and dissolved CO2 was up to fortyfold supersaturated relative to the atmosphere. δ13 C of DIC indicates the portion of soil CO2 contributed in water and is related with soil thickness of infiltrating water in aquifer and could be therefore used as a tool for vulnerability assessment. The δ13 C of DIC ranged from−15.8‰ to −1.5‰ and indicated less and more vulnerable aquifers. Mass balances of carbon for spring waters draining carbonate rocks suggest that carbonate dissolution contributes from approximately 49% to 86% and degradation of organic matter from 13.7% to 51.4%, depending on spring and its relation with rock type, soil environment, and geomorphic position. Stable oxygen isotope composition of water (δ18OH2O), and tritium values range from −12.2 to −9.3‰and from6.4 to 9.8 TU, respectively and indicate recharge frommodern precipitation. According to active decay of tritiumand tritiumin modern precipitation the age of spring waters are estimated to be about 2.6 years for springs located in Julian Alps, about 5 years for springs located in Karavanke and about 5 years for springs located in Kamniško–Savinjske Alps

Composition of common bean cesnjenec and green lentil anicia and their nutritive value for growing rats

*Unité de Nutrition et Métabolisme Protéique, INRA Centre de Clermont-Ferrand-Theix Diffusion du document : Unité de Nutrition et Métabolisme Protéique, INRA Centre de Clermont-Ferrand-TheixInternational audienc

Hydrogeochemistry of Alpine springs from North Slovenia: Insights from stable isotopes

Springwater chemistry and carbon cycling in our study mainly depend on geological composition of the aquifer. The investigated Alpine springs in Slovenia represent waters strongly influenced by chemicalweathering ofMesozoic limestone and dolomite, only one spring was located in Permo-Carboniferous shales. The carbon isotopic composition of dissolved inorganic carbon (DIC) and suspended organic carbon (POC) as well as major solute concentrations yielded insights into the origin of carbon in Alpine spring waters. The major solute composition was dominated by carbonic acid dissolution of calcite. Waters were generally close to saturation with respect to calcite, and dissolved CO2 was up to fortyfold supersaturated relative to the atmosphere. δ13 C of DIC indicates the portion of soil CO2 contributed in water and is related with soil thickness of infiltrating water in aquifer and could be therefore used as a tool for vulnerability assessment. The δ13 C of DIC ranged from−15.8‰ to −1.5‰ and indicated less and more vulnerable aquifers. Mass balances of carbon for spring waters draining carbonate rocks suggest that carbonate dissolution contributes from approximately 49% to 86% and degradation of organic matter from 13.7% to 51.4%, depending on spring and its relation with rock type, soil environment, and geomorphic position. Stable oxygen isotope composition of water (δ18OH2O), and tritium values range from −12.2 to −9.3‰and from6.4 to 9.8 TU, respectively and indicate recharge frommodern precipitation. According to active decay of tritiumand tritiumin modern precipitation the age of spring waters are estimated to be about 2.6 years for springs located in Julian Alps, about 5 years for springs located in Karavanke and about 5 years for springs located in Kamniško–Savinjske Alps.Published40-544.5. Studi sul degassamento naturale e sui gas petroliferiJCR Journalrestricte