Search results for "composition"

Phytochemical profile and phototoxicity of eleven Hypericum species extracts

2017

The genus Hypericum (family Hypericaceae) contains 484 species, one of which, Hypericum perforatum, is largely used in medicine as antidepressant, as well as antinflammatory, and antimicrobial agent. Hypericin, together with the other naphthodianthrone derivatives named hypericins (the red pigments recognized as partially responsible for biological activities of this plant), has been identified largely in more than 300 Hypericum species (Skalkos et al., 2006). Particularly, hypericins are one of the most potent naturally occurring photodynamic agents; indeed, upon light irradiation, they very effectively induce apoptosis and/or necrosis of cancer cells (Karioti et al., 2010) and thus might …

Assessment of Physical and Chemical Stability of Different Magnesium Compounds in Tablets

2020

Modern lifestyle, excessive chemicalization of agricultural products, excessive processing and refining of food, cause a decrease in daily intake of magnesium, cation with an extremely important role in prevention and treatment of many diseases. As a result, there arises the need for extra magnesium intake in the form of dietary supplements. In this study were evaluated the physical and chemical stability of magnesium-containing tablets, depending on the active compound and the excipients used. Magnesium tablets in the form of orotate, lactate, citrate, oxide and hydroxide were taken into study and physical and chemical stability were observed over the validity period, at 6 and at 12 month…

Solar UV radiation and plant responses : assessing the methodological problems in research concerning stratospheric ozone depletion

2010

Kohn-Sham Decomposition in Real-Time Time-Dependent Density-Functional Theory An Efficient Tool for Analyzing Plasmonic Excitations

2017

The real-time-propagation formulation of time-dependent density-functional theory (RT-TDDFT) is an efficient method for modeling the optical response of molecules and nanoparticles. Compared to the widely adopted linear-response TDDFT approaches based on, e.g., the Casida equations, RT-TDDFT appears, however, lacking efficient analysis methods. This applies in particular to a decomposition of the response in the basis of the underlying single-electron states. In this work, we overcome this limitation by developing an analysis method for obtaining the Kohn-Sham electron-hole decomposition in RT-TDDFT. We demonstrate the equivalence between the developed method and the Casida approach by a be…

Apparent and quantitative loss of fatty acids and triacylglycerols at frying temperatures

2012

[EN]: Olive and sunflower oils were heated at 180 °C for 5, 10 and 15 hours with the aim of defining the changes in the contents of fatty acid methyl esters (FAME) and triacylglycerols (TAG) under frying conditions. Differences between apparent and real loss of FAME or TAG are defined for an adequate interpretation of the changes taking place at high temperature. Such differences depend on the expression of the results and frequently result in erroneous conclusions. Results showed that from the normalized composition it could be deduced that only the most unsaturated FAME (C18:2) or TAG containing it was significantly altered. However, quantitative data indicated that all the unsaturated FA…

Technological change, occupational composition, and wage premiums : evidence from linked employer-employee data

2010

Data from: The interplay of landscape composition and configuration: new pathways to manage functional biodiversity and agro-ecosystem services acros…

2019

[Usage Notes] Martin et al_2019_datatables Data used in Martin et al. (2019) compiled from 49 studies and 1,515 landscapes across Europe. Includes data on the abundance of arthropod species per site and data on pollination, natural pest control and yields in crops across Europe. Martin et al_2019_data tables_300319.xlsx Martin et al_2019_traits database Functional traits data for 2088 species (morphospecies, individuals) from 144 arthropod families sampled in agricultural landscapes across Europe. All traits are categorical and based on published literature or expert knowledge. They are described in Table 1 and Appendix S1 of Martin et al. (2019). The traits included are: feeding habit ('Fu…

Prickly pear pulp in the feeding of livestock ruminants: preliminary investigation

2019

In Sicily, the current increasing cultivation of Opuntia ficus-indica (L.) Mill. corresponds to a availability of prickly pears pulp (PPP) that residues from fruits processing for juice extraction, comprised of peel, pulp and seeds. This investigation aim to evaluate the nutritional traits of PPP for ruminants feeding, and the effect of potassium metabisulfite (PMB) as a natural stabilizer to limit initial rapid PPP fermentation. The by-product, collected in August, included 28% of peel and pulp (PP) and 72% of seeds on dry matter (DM), with seeds higher in ether extract (EE) and NDF and comparable for DM and crude protein (CP) (DM 35.5, 35.9 and 35.6%; EE 6.5, 3.6 and 8.5% DM; CP 6.5, 6.0 …

Physico-chemical characterisation of a non-conventional food protein source from earthworms and sensory impact in arepas

2009

International audience; This study aimed to characterise a non-conventional protein source: a powder made from earthworms, and to evaluate its potential use as human food. The way it was prepared led to low solubility and wide particle size distribution. Sensory analysis was used to assess the acceptability and the organoleptic properties of maize-based pan-cakes fortified with this novel protein powder. Satisfying products were obtained with a substitution level of 5.5% (w/w) earthworm powder in pan-cakes. GC-MS allowed the identification of more than seventy volatile compounds that may be responsible for the off-odour of the powder. The most abundant chemical groups found in the volatile …

Huit objets de cuivre et de bronze du piémont pyrénéen oriental : analyse croisée typologique et métallique

2015

Cet article porte sur huit pièces à base de cuivre – deux haches plates et six poignards – provenant de la zone sous-pyrénéenne orientale (Corbières, Haute Vallée de l’Aude, Pays d’OImes), dans les départements de l’Aude et de l’Ariège de l’Est (région de Lavelanet). Elles sont décrites et replacées dans leur contexte typochronologique, alors que les aspects technoéconomiques sont envisagés via la composition métallique (composition élémentaire et rapports isotopiques du plomb). Cinq objets en cuivre – deux haches et trois poignards – sont attribués au Chalcolithique. L’une des haches se rapproche des types nord-ibériques et son importation depuis cette région est suggérée par les analyses …