Search results for " antioxidants"

showing 10 items of 87 documents

The effect of different technologies in Pomegranate jam preparation on the phenolic compounds, vitamin C and antioxidant activity

2023

The effect of different gelling agents and processing for jam production from pomegranate juice was evaluated. In the last years, different gelling agents were tested for improving jam quality in terms of color and bioactive compounds. The unsonicated and sonicated pomegranate juices were processed for jam production by micro waves, under vacuum and cryoconcentration concentration methods using low and high methoxy pectins, and carob seed flour as gelling agents. The polyphenols content of sonicated jam was significantly lower than unsonicated samples and cryoconcentrated jams showed the significantly highest value among other methods. The results showed the highest anthocyanin content in t…

Pomegranate jam Cryoconcentration Antioxidants AnthocyaninsPomegranate jam Cryoconcentration Antioxidants AnthocyaninsSettore AGR/15 - Scienze E Tecnologie AlimentariBiochemistryFood Science

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Antioxidant Bibenzyl Derivatives from Notholaena nivea Desv.

2011

Four new bibenzyl derivatives were isolated, together with other known bibenzyls, by bioassay-guided fractionation of a CHCl3-MeOH extract of Notholaena nivea Desv. (Pteridaceae) aerial parts. The structures were elucidated by NMR, ESIMS and other spectral analyses. Their antioxidative effects towards superoxide, lipidic peroxidation and the 2,2'- azino-bis-3- ethilbenzothiazoline-6-sulfonic acid (ABTS) radical were assayed. Results showed that the compound 3,12-dihydroxy-5-methoxybibenzyl (6) is the most active compound in the ABTS free-radical scavenging test, while in the coupled oxidation of ȕ-carotene and linoleic acid assay the compound 5,12-dihydroxy-3-methoxydibenzyl-6- carboxylic a…

PteridaceaeSpectrometry Mass Electrospray IonizationMagnetic Resonance SpectroscopyAntioxidantStereochemistrymedicine.medical_treatmentLinoleic acidNatural products active principles oxidative stress.Pharmaceutical ScienceArticleAntioxidantsAnalytical Chemistrylcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistryDrug DiscoverymedicineBibenzylPhysical and Theoretical Chemistrychemistry.chemical_classificationABTSbiologyPlant Extractsbibenzyl derivativesSuperoxideOrganic ChemistryNotholaenabiology.organism_classificationNMR<em>Notholaena nivea</em>; bibenzyl derivatives; NMR; antioxidants activityEnzymechemistryBiochemistryChemistry (miscellaneous)PteridaceaeMolecular MedicineNotholaena niveaantioxidants activityMolecules

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Oxidative Stress and Respiratory System: Pharmacological and Clinical Reappraisal of N-Acetylcysteine

2014

Abstract The large surface area for gas exchange makes the respiratory system particularly susceptible to oxidative stress-mediated injury. Both endogenous and exogenous pro-oxidants (e.g. cigarette smoke) trigger activation of leukocytes and host defenses. These mechanisms interact in a ìmultilevel cycleî responsible for the control of the oxidant/antioxidant homeostasis. Several studies have demonstrated the presence of increased oxidative stress and decreased antioxidants (e.g. reduced glutathione [GSH]) in subjects with chronic obstructive pulmonary disease (COPD), but the contribution of oxidative stress to the pathophysiology of COPD is generally only minimally discussed. The aim of t…

Pulmonary and Respiratory MedicineChronic ObstructiveAntioxidantantioxidantNeutrophilsmedicine.medical_treatmentAntioxidant; Copd exacerbation; Lung function; Small airways; Acetylcysteine; Antioxidants; Bronchitis Chronic; Disease Progression; Expectorants; Forced Expiratory Volume; Hospitalization; Humans; Macrophages; Neutrophils; Pulmonary Disease Chronic Obstructive; Reactive Oxygen Species; Respiratory Physiological Phenomena; Oxidative Stress; Pulmonary and Respiratory MedicineAntioxidant; Copd exacerbation; Lung function; Small airways; Acetylcysteine; Antioxidants; Bronchitis Chronic; Disease Progression; Expectorants; Forced Expiratory Volume; Hospitalization; Humans; Macrophages; Neutrophils; Pulmonary Disease Chronic Obstructive; Reactive Oxygen Species; Respiratory Physiological Phenomena; Oxidative StressOxidative phosphorylationReviewSettore MED/10 - Malattie Dell'Apparato Respiratoriomedicine.disease_causeAntioxidantsAcetylcysteinePulmonary Diseasechemistry.chemical_compoundPulmonary Disease Chronic ObstructiveCOPD exacerbationForced Expiratory VolumemedicineHumansRespiratory systemChronicBronchitisExpectorantschemistry.chemical_classificationCOPDReactive oxygen speciessmall airwaysbusiness.industryMacrophageslung functionGlutathionemedicine.diseaseAcetylcysteineBronchitis ChronicHospitalizationOxidative StresschemistryImmunologyDisease ProgressionRespiratory Physiological PhenomenabusinessReactive Oxygen SpeciesOxidative stressmedicine.drug

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The determination of polyphenols content in white mulberry leaves.

2008

E. Ciampi, G. Alonzo, A. Sinacori. Cultivation of Mulberry, particularly Morus alba L., was introduced in Europe between the ninth and the twelfth centuries together with sericulture. Mulberry as both Morus alba L. and Morus nigra L. Species, is a rustic plant, well suited for the Mediterranean climate and which is also appreciated for its fruits. Found in the past useful in medicinal applications, is now, from recent studies, indicated as potential health beneficial for the high content in polyphenol substances. Mulberry leaves from 13 varieties, grown in the experimental field of the University of Palermo, Agriculture Faculty, have been investigated for their content in antioxidant substa…

Settore AGR/11 - Entomologia Generale E ApplicataMulberry plants polyphenolic leaves antioxidants.

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Oxidative Status of Goats with Different CSN1S1 Genotypes Fed ad Libitum with Fresh and Dry Forages

2020

Forty late-lactation Girgentana goats were used to study the effect of diets fed ad libitum and &alpha

Settore AGR/19 - Zootecnica Speciale040301 veterinary sciencesPhysiologyClinical BiochemistryOxidative phosphorylationBiologymedicine.disease_causeBiochemistryredox balance0403 veterinary scienceSuperoxide dismutasechemistry.chemical_compoundNEFAAnimal sciencemedicinefresh forageMolecular Biologychemistry.chemical_classificationenzymatic antioxidantsCholesterolenzymatic antioxidantGlutathione peroxidaselcsh:RM1-950digestive oral and skin physiologygoat0402 animal and dairy scienceAlbumin04 agricultural and veterinary sciencesCell Biology040201 dairy & animal sciencelcsh:Therapeutics. PharmacologychemistryPolyphenolCSN1S1 genotypegoat; diet; fresh forage; redox balance; enzymatic antioxidantsbiology.proteinCSN1S1 genotype; diet; enzymatic antioxidants; fresh forage; goat; redox balancedietOxidative stressAntioxidants

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Effect of sodium dodecyl sulfate (SDS) on stress response in the Mediterranean mussel (Mytilus Galloprovincialis): Regulatory volumedecrease (Rvd) an…

2014

In this study the effects of an anionic surfactant, sodium dodecyl sulfate (SDS), are assessed on the Mediterranean mussel (. Mytilus galloprovincialis), exposed for 18 days at a concentration ranging from 0.1. mg/l to 1. mg/l. The effects are monitored using biomarkers related to stress response, such as regulatory volume decrease (RVD), and to oxidative stress, such as reactive oxygen species (ROS), endogenous antioxidant systems and Hsp70 levels. The results demonstrate that cells from the digestive gland of M. galloprovincialis, exposed to SDS were not able to perform the RVD owing to osmotic stress. Further, SDS causes oxidative stress in treated organisms, as demonstrated by the incre…