Search results for "polifenol"

From waste to health: sustainable exploitation of grape pomace seed extract to manufacture antioxidant, regenerative and prebiotic nanovesicles withi…

2020

AbstractPomace seed extract loaded vesicles were prepared as promising technological and green solution to exploit agri-food wastes and by-products, and develop high value-added products for human health. An antioxidant extract rich in bioactive compounds (epicatechins, catechin, gallic acid, quercetin and procynidins) was obtained from the seeds isolated from the pomace of Cannonau red grape cultivar. The extract was incorporated into phospholipid vesicles ad hoc formulated for intestinal delivery, by combining them, for the first time, whit a maltodextrin (Glucidex). Glucidex-transfersomes, glucidex-hyalurosomes and glucidex-hyalutransferomes were prepared, characterized and tested. Gluci…

Polyphenol Levels Are Inversely Correlated with Body Weight and Obesity in an Elderly Population after 5 Years of Follow Up (The Randomised PREDIMED …

2017

Overweight and obesity have been steadily increasing in recent years and currently represent a serious threat to public health. Few human studies have investigated the relationship between polyphenol intake and body weight. Our aim was to assess the relationship between urinary polyphenol levels and body weight. A cross-sectional study was performed with 573 participants from the PREDIMED (Prevención con Dieta Mediterránea) trial (ISRCTN35739639). Total polyphenol levels were measured by a reliable biomarker, total urinary polyphenol excretion (TPE), determined by the Folin-Ciocalteu method in urine samples. Participants were categorized into five groups according to their TPE at the fifth …

Pterostilbeno, un polifenol natural con efectos antitumorales mediados por la permeabilización de la membrana lisosomal

2014

El desarrollo de moléculas y estrategias terapéuticas llevado a cabo en los últimos años se ha mostrado ineficaz en el tratamiento del cáncer. Por esta razón, es necesario el desarrollo de nuevas moléculas, búsqueda de nuevas dianas y nuevas aproximaciones terapéuticas. Los polifenoles son un grupo de compuestos químicos de origen vegetal con efectos beneficiosos para la salud. Se han observado efectos favorables en la prevención y tratamiento del cáncer (1), enfermedades cardiovasculares (2), neurodegenerativas (3) y en aquellas patologías donde el estrés oxidativo juega un papel importante. Se asume que estos efectos beneficiosos se deben fundamentalmente a sus propiedades antioxidantes (…

Mikrozaļumu ķīmiskais sastāvs atkarībā no fotoperioda audzēšanas laikā

2020

Literatūras apskatā ir aprakstīts augu ķīmiskais sastāvs un gaismas ietekme uz to. Apkopotas paraugu sagatavošanas un analīzes metodes. Darbā ir veikta četru dažādu ģiņšu mikrozaļumu diedzēšana pie 4, 8 un 12 stundu ilgiem fotoperiodiem. Spektrometriski ir noteikta kopējā hlorofila un karotenoīdu koncentrācija, kopējā polifenolu koncentrācija un antiradikālā aktivitāte augos. Noteica mikroelementu un makroelementu sastāvu augos ar ICP-MS metodi. Noteica brīvo aminoskābju koncentrāciju augos ar HPLC-MS metodi. Iegūtie dati salīdzināti savā starpā, kā arī tika salīdzināts ķīmiskais sastāvs atkarībā no fotoperioda.

MANUALE TECNICO APPLICATIVO PROGETTO ASASI

2014

Šķidruma hromatogrāfijas un masspektrometrijas metožu izstrāde un pielietojums antioksidantu noteikšanai

2017

Antioksidanti ir plaši izplatīti augu valsts pārtikas produktos un pēdējā desmitgadē tiem ir pievērsta pastiprināta uzmanība. Pateicoties to veselību uzlabojošajām īpašībām, ir radusies palielināta interese par to noteikšanas veidiem dažāda veida augos un augu izcelsmes produktos. Līdz ar augsti efektīvās šķidrumu hromatogrāfijas pieejamību apvienojumā ar augstas izšķirtspējas masspektrometriju, ir pavērti jauni apvāršņi analītisko metožu izstrādei sarežģītās paraugu matricās. Darbā dots ieskats par antioksidantu un polifenolu īpašībām, to izdalīšanu no pārtikas produktiem, paraugu sagatavošanas un noteikšanas metodēm, izmantojot augsti efektīvās šķidruma hromatogrāfijas metodes. Kā pētījum…

Effects of Polyphenol, Measured by a Biomarker of Total Polyphenols in Urine, on Cardiovascular Risk Factors After a Long-Term Follow-Up in the PREDI…

2016

Several epidemiological studies have shown an inverse association between the consumption of polyphenol-rich foods and risk of cardiovascular diseases. However, accuracy and reliability of these studies may be increased using urinary total polyphenol excretion (TPE) as a biomarker for total polyphenol intake. Our aim was to assess if antioxidant activity, measured by a Folin-Ciocalteu assay in urine, is correlated with an improvement in cardiovascular risk factors (blood pressure and serum glucose, cholesterol, HDL-cholesterol, LDL-cholesterol, and triglyceride concentrations) in an elderly population at high risk. A longitudinal study was performed with 573 participants (aged 67.3 ± 5.9) f…

Interpretazione del colore dei vini rossi nel corso della maturazione

2009

Influenza della fermentazione malolattica sull’evoluzione del colore dei vini rossi

2008

Rovello bianco, caratterizzazione di un vitigno autoctono campano.

2009

Il “Rovello bianco”, conosciuto localmente come “Greco muscio” nuovo vitigno autoctono campano è stato oggetto di uno studio triennale (2004-2005) considerando il “Fiano” come varietà di riferimento. L’analisi molecolare mediante marcatori micro satelliti (SSR) ne ha stabilito l’unicità del profilo genetico. La valutazione agronomica è stata ottenuta attraverso annuali e sistematici rilievi, effettuati su 50 piante di 5 anni di età, registrando da parte del “Rovello bianco” un più basso vigore vegetativo rispetto al “Fiano” e una buona resistenza alle più diffuse fitopatie. Ben distinta dal vino “Fiano” è risultata invece la componente organica volatile. Principalmente alcoli isoamilici qua…