Search results for "GIF"
showing 10 items of 158 documents
Mangifera indica L. Extract and Mangiferin Modulate Cytochrome P450 and UDP-Glucuronosyltransferase Enzymes in Primary Cultures of Human Hepatocytes
2012
The aqueous stem bark extract of Mangifera indica L. (MSBE) has been reported to have antioxidant, anti-inflammatory and analgesic properties. In previous studies, we showed that MSBE and mangiferin, its main component, lower the activity of some cytochrome P-450 (P450) enzymes in rat hepatocytes and human liver microsomes. In the present study, the effects of MSBE and mangiferin on several P450 enzymes and UDP-glucuronosyltransferases (UGTs) in human-cultured hepatocytes have been examined. After hepatocytes underwent a 48-h treatment with sub-cytotoxic concentrations of the products (50-250 µg/mL), a concentration-dependent decrease of the activity of the five P450 enzymes measured (CYP1A…
Secoiridoids and Xanthones fromGentianella nitida
1996
From Gentianella nitida twelve known metabolites were isolated and identified by HPLC-UV and/or by spectroscopic methods as secologanoside, amaroswerin, amarogentin (secoiridoids), isoorientin (C-glucosylflavone), mangiferin, demethylbellidifolin 8-O-glucoside, norswertianine 1-O-glucoside, swertianine 1-O-primeveroside, swertianine 8-O-glucoside, norswertianine, demethylbellidifolin, and swertianine (xanthone glycosides and aglycones). Secologanoside is reported here for the first time in Gentianaceae species ; the antioxidant mangiferin was obtained as the major compound in good yield.
Inhibition of human P450 enzymes by natural extracts used in traditional medicine
2008
Different medicinal plants are widely used in Cuba and Mexico to treat several disorders. This paper reports in vitro inhibitory effects on the P450 system of herbal products commonly used by people in Cuba and Mexico in traditional medicine for decades. Experiments were conducted in human liver microsomes. The catalytic activities of CYP1A1/2, 2D6, and 3A4 were measured using specific probe substrates. The Heliopsis longipes extract exhibited a concentration-dependent inhibition of the three enzymes, and similar effects were produced by affinin (an alkamide isolated from the H. longipes extract) and two catalytically reduced alkamides. Mangifera indica L. and Thalassia testudinum extracts,…
Granting Epicurean Wisdom at Rome: Exchange and Reciprocity in Lucretius' Didactic (DRN 1.921-950)
2018
In the first book of De Rerum Natura, Lucretius describes his didactic undertaking as a metaphorical process of gift exchange (1.50-53): the obscure and salvific precepts of Epicurean philosophy, skilfully arranged in hexameters, are said to be 'gifts' (dona) that the poet has prepared with loyal zeal (studio fideli). Such a suggestive depiction of Lucretius' relationship to the work's dedicatee, Gaius Memmius, seems to reflect a relevant functional pattern of De Rerum Natura as a coherent system of communication strategies, variously readapting social models and cultural traditions. The present paper employs the interpretative approach of gift theories – the thought-provoking theories elab…
Geographical assemblages of European raptors and owls
2008
Abstract In this work we look for geographical structure patterns in European raptors (Order: Falconiformes) and owls (Order: Strigiformes). For this purpose we have conducted our research using freely available tools such as statistical software and databases. To perform the study, presence–absence data for the European raptors and owl species (Class Aves) were downloaded from the BirdLife International website. Using the freely available “pvclust” R-package, we applied similarity Jaccard index and cluster analysis in order to delineate biogeographical relationships for European countries. According to the cluster of similarity, we found that Europe is structured into two main geographical…
Comparative study on the quality characteristics of some Egyptian mango cultivars used for food processing
2016
This study aims to investigate the physical, chemical, rheological and sensorial properties of six common mango (Mangifera indica) cultivars in Egypt. These common cultivars were Alfonse, Sedeka, Awis, Sinara, Sukari and Zibdia. Weights of mango fruits ranged between 246.6 and 549.2 g. The highest significant value of sphericity was in Alfonse fruits (0.82), whereas the lowest value was 0.58 in Sinara fruits. The highest firmness value was 29.51 N in Sedeka fruits. The highest elasticity was 1.16 N/mm for Sukari fruits. The significantly color intensity chroma was recorded by Sinara, whereas the highest total color index (ΔE) was 88.41 for Sedeka mango cultivar. The significantly lowest pH …
NATIONAL PHYSICS OLYMPIADS FROM THE POINT OF VIEW OF PARTICIPANTS AND PHYSICS TEACHERS
2021
The development of student's interests and skills is strategically important to foster their career choice in the field of science, technology and engineering, which is one of the goals of Latvia's National Development Plan for 2021-2027. Physics Olympiads can be used as one of the enrichment measures to supplement formal school teaching in raising student motivation and developing their skills and talents. We explore directions in which the existing system of Physics Olympiads can be improved, with the goals of reaching a wider audience of teachers and students and achieving further integration with the learning processes in schools. We have conducted a survey of physics teachers (NT=188),…
Antioxidant phenolic compounds recovery from Mangifera indica L. by-products by supercritical antisolvent extraction
2015
Abstract Supercritical Antisolvent Extraction (SAE) was used in the recovery of antioxidant compounds from mango by-products. The antioxidant extract was obtained by solid–liquid extraction using aqueous acetone (80% v/v) and subsequent adsorption/desorption in C18 cartridge. Recovery of antioxidants was performed by SAE using SC-CO 2 as antisolvent. The temperature and pressure parameters were varied in the range 35–45 °C and 8–15 MPa. The SAE process allowed the recovery of about 90% of the initial phenolic compounds, the best recovery was obtained at 40 °C and 10 MPa and the main compounds were mangiferin, isomangiferin, quercetin 3-O-galactoside, quercetin 3-O-glucoside, quercetin 3-O-x…
Introduzione ad Arte : Artworks, mimesis, agency
2021
Il volume raccoglie alcune delle relazioni tenute all’interno del ciclo di seminari Antropologia dell’arte, organizzato nel 2019 dall’Associazione per la conservazione delle tradizioni popolari in collaborazione con l’Accademia di Belle Arti di Palermo e curato da Rosario Perricone. Il seminario comprendeva diversi incontri durante i quali studiosi di diversi ambiti disciplinari hanno dibattuto su concetti, nozioni e oggetti che si pongono al crocevia tra le discipline dell’antropologia, della storia dell’arte, della semiotica, degli studi culturali, della visual culture, delineando talvolta fenomeni di ibridazione delle pratiche artistiche ed etnografiche e, talvolta, di dissolvenza delle …
Etnografie ad arte : agency, mimesis, creatività e pratica degli artworks
2021
Il volume raccoglie alcune delle relazioni tenute all’interno del ciclo di seminari Antropologia dell’arte, organizzato nel 2019 dall’Associazione per la conservazione delle tradizioni popolari in collaborazione con l’Accademia di Belle Arti di Palermo e curato da Rosario Perricone. Il seminario comprendeva diversi incontri durante i quali studiosi di diversi ambiti disciplinari hanno dibattuto su concetti, nozioni e oggetti che si pongono al crocevia tra le discipline dell’antropologia, della storia dell’arte, della semiotica, degli studi culturali, della visual culture, delineando talvolta fenomeni di ibridazione delle pratiche artistiche ed etnografiche e, talvolta, di dissolvenza delle …