Antioxidant Efficiency of Irganox® 1010 on Processing and Properties of Plasticized Poly(3-Hydroxybutyrate) Films

2021 ◽  
Vol 9 ◽  
pp. 7-16
Author(s):  
Marcelo A. Villar ◽  
◽  
Olivia López ◽  
Mayte Quispe
Keyword(s):  
Antioxidant Efficiency

scholarly journals Effect of Propagation Method and Ploidy Level of Various Rootstocks on the Response of the Common Clementine (Citrus clementina Hort. ex Tan) to a Mild Water Deficit

Agriculture ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 321 ◽  
Author(s):  
Julie Oustric ◽  
Radia Lourkisti ◽  
Stéphane Herbette ◽  
Raphaël Morillon ◽  
Gilles Paolacci ◽  
...  
Keyword(s):  
Water Deficit ◽  
Ploidy Level ◽  
Fruit Size ◽  
Redox Balance ◽  
Fruit Production ◽  
Photosynthetic Parameters ◽  
Trifoliate Orange ◽  
Antioxidant Efficiency ◽  
Diploid Genotype ◽  
Propagation Methods

Current climatic upheavals reduce water availability which impacts the growth and fruit quality of plants. In citrus crops, scion/rootstock combinations are used to ensure high fruit production and quality and a stress tolerance/resistance. Our objective was to assess the effect on the clementine scion (C) under natural mild water deficit of (i) polyploid rootstocks by comparing the allotetraploid FlhorAG1 (C/4xFLs; trifoliate orange + Willowleaf mandarin) with its diploid parents, trifoliate orange (C/2xTOs), and Willowleaf mandarin (C/2xWLs), and with a diploid genotype used as reference (Carrizo citrange, C/2xCCs), (ii) rootstock propagation methods by comparing trifoliate orange seedling (C/2xTOs) with cutting (C/2xTOc). A mild water deficit observed under orchard conditions during the summer period (July–August) induced a significant change in yield (except in C/2xTOs), fruit size, and quality. C/2xCCs, C/2xTOs, and C/2xWLs appeared less affected by water deficit as indicated by their lower reduction of predawn leaf water potential (Ψpd), relative water content (RWC), transpiration (E), and photosynthetic parameters (Pnet and gs). Their greater redox balance was probably due to their better antioxidant efficiency. Seedling rootstocks lead to a better adaptation of clementine scions to water deficit than cutting or allotetraploid rootstock. Improving the tolerance to water deficit requires taking into consideration the rootstock genotype, propagation method, and ploidy level.

Antioxidant Efficiency of Oxovitisin, a New Class of Red Wine Pyranoanthocyanins, Revealed through Quantum Mechanical Investigations

2013 ◽  
Vol 53 (1) ◽  
pp. 66-75 ◽  
Author(s):  
Stefano Alcaro ◽  
Sandro Giuseppe Chiodo ◽  
Monica Leopoldini ◽  
Francesco Ortuso
Keyword(s):  
Red Wine ◽  
Quantum Mechanical ◽  
Antioxidant Efficiency ◽  
New Class

scholarly journals Effect of the natural antioxidant eugenol on quality preservation of commercial biodiesels produced with soybean oil or waste frying oil during storage at different temperatures

2018 ◽  
Vol 40 ◽  
pp. 61
Author(s):  
Eliane Ferreira de Souza ◽  
Talita Cuenca Pina Moreira Ramos ◽  
Mikaelly Nayara Santos ◽  
Juliana Rodrigues Ferraz ◽  
Margarete Soares da Silva ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Oxidation Stability ◽  
Oxidative Degradation ◽  
Acid Number ◽  
Natural Antioxidant ◽  
Waste Frying Oil ◽  
Antioxidant Efficiency ◽  
Accelerated Oxidation ◽  
Oxidation Test ◽  
Rancimat Method

The objetive of this study was to evaluate the eugenol antioxidant efficiency on the oxidation stability of commercial biodiesel synthesized from soybean oil (SB) and wast fring oil (ORB) by determining induction period (IP) and acid number (AN) during storage at 10 °C or in accelerated oxidation test at 85 °C. For the oxidation stability evaluation, the Rancimat method (EN 14112) and AN (ASTM D664) analyses were used. The initial studies showed that the antioxidants eugenol and TBHQ when added separately increased IP values for the two types of biodiesel analyzed. During the storage at 10 °C, the IP was reduced for all samples. However, the lowest reduction percentages were for samples containing eugenol (-2.07 and -11.30% for SB and ORB, respectively). In relation to AN, the samples with the antioxidant eugenol led a greater decrease of this index, with the 10000 mg kg-1 concentration being the most efficient in the conservation of biodiesel. In the accelerated oxidation test in oven at 85 °C, pure BS presented higher susceptibility to degradation than the sample containing 10000 mg kg-1 of eugenol. In both storage studies, the eugenol natural antioxidant efficiency in the control of oxidative degradation of biodiesel becomes evident. 

scholarly journals EFFECTIVENESS OF CERTAIN STABILIZERS ON THE AGEING OF POLYETHYLENE FILMS

1998 ◽  
Vol 6 (6) ◽  
pp. 71-76
Author(s):  
S. JIPA ◽  
R. SETNESCU ◽  
T. SETNESCU ◽  
C. PODINA ◽  
J. MIHALCEA
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Low Density Polyethylene ◽  
Phenolic Antioxidants ◽  
Low Density ◽  
Chemiluminescence Method ◽  
Antioxidant Efficiency ◽  
Polyethylene Films

The effectiveness of different phenolic antioxidants on high-density polyethylene (HDPE) and low-density polyethylene (LDPE) has been studied by the Isothermal chemiluminescence method. The decreasing order of the antioxidant efficiency for these polymers Is as follows: lrganox 1010 >> Etanox 330 > lrganox 1076 (Hostanox 016) > Topanol OC

Synthesis and antioxidant efficiency of a new amphiphilic spin-trap derived from PBN and lipoic acid

2003 ◽  
Vol 13 (16) ◽  
pp. 2673-2676 ◽  
Author(s):  
G. Durand ◽  
A. Polidori ◽  
J.P. Salles ◽  
M. Prost ◽  
P. Durand ◽  
...  
Keyword(s):  
Lipoic Acid ◽  
Spin Trap ◽  
Antioxidant Efficiency

Anthocyanin composition, antioxidant efficiency, and α-amylase inhibitor activity of different Hungarian sour cherry varieties (Prunus cerasus L.)

2016 ◽  
Vol 194 ◽  
pp. 222-229 ◽  
Author(s):  
Judit R. Homoki ◽  
Andrea Nemes ◽  
Erika Fazekas ◽  
Gyöngyi Gyémánt ◽  
Péter Balogh ◽  
...  
Keyword(s):  
Sour Cherry ◽  
Prunus Cerasus ◽  
Inhibitor Activity ◽  
Antioxidant Efficiency ◽  
Amylase Inhibitor ◽  
Anthocyanin Composition

Hypocholesterolaemic and antioxidant efficiency of chickpea (Cicer arietinum) protein hydrolysates depend on its degree of hydrolysis in cholesterol-fed rat

2017 ◽  
Vol 47 (2) ◽  
pp. 254-269 ◽  
Author(s):  
Sanaa Yahia ◽  
Souhila Benomar ◽  
Faiza Dehiba ◽  
Amine Allaoui ◽  
Natalia Guillen ◽  
...  
Keyword(s):  
Cicer Arietinum ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Protein Hydrolysates ◽  
Control Group ◽  
Degree Of Hydrolysis ◽  
Low Density ◽  
Acyltransferase Activity ◽  
Antioxidant Efficiency ◽  
Content Type

Purpose The purpose of this study was to determine the effects of chickpea (Cicer arietinum) protein hydrolysates prepared at two degrees of hydrolysis (DH) on lipoprotein profile and on oxidant status in cholesterol-fed rats. Design/methodology/approach Eighteen male Wistar rats (220 ± 10 g) were divided into three groups and fed for 30 days a diet containing 20 per cent casein supplemented with 1 per cent cholesterol and 0.5 per cent cholic acid. During the experimentation, the first and the second groups received daily by gavage 250 mg of chickpea protein hydrolysates/rat at DH = 8 per cent (CPH8) and DH = 17 per cent (CPH17), respectively. The third group, named control group (CG), received water under the same conditions. Findings Serum total cholesterol concentrations were reduced in CPH8 (p < 0.0073) and CPH17 (p < 0.0004) groups versus CG. This reduction corresponded to a lower very-low-density lipoprotein (VLDL)-cholesterol (p < 0,0019). CPH17 reduced low-density lipoprotein- and high-density lipoprotein (HDL)-cholesterol (p < 0.0001) but increased apolipoprotein A4 (p < 0.002) concentrations and lecithin-cholesterol acyltransferase activity (p < 0.0001). APOA1 remained unchanged in the treated groups. Liver total and esterified cholesterol contents were twofold lower in both treated groups versus CG. CPH8 increased triacylglycerols and phospholipids (p < 0.0001) contents, while CPH17 decreased those of unesterified cholesterol (p < 0.0016). Compared with CG, CPH8 and CPH17 reduced serum (p < 0.0001) and lipoprotein hydroperoxides by stimulating paraoxonase activity (p < 0.0001). However, only CPH17 treatment reduced serum, VLDL- and HDL-malondialdehyde contents and improved glutathione peroxidase activity (p < 0.061). Originality/value Thus, chickpea protein hydrolysates and especially hydrolysed at DH = 17 per cent may have a great potential for use as a nutraceutical to reduce hypercholesterolaemia and, by consequence, oxidative stress. Therefore, the degree of enzymatic hydrolysis has a significant influence on the production of potent bioactive peptides.

Protective Effect of Quaternary Piperidinium Salts on Lipid Oxidation in the Erythrocyte Membrane

1999 ◽  
Vol 54 (5-6) ◽  
pp. 424-428 ◽  
Author(s):  
Halina Kleszczyńska ◽  
Małgorzata Oświęcimska ◽  
Janusz Sarapuk ◽  
Stanisław Przestalski ◽  
Stanisław Witek
Keyword(s):  
Lipid Oxidation ◽  
Chain Length ◽  
Erythrocyte Membrane ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Erythrocyte Membranes ◽  
Negative Consequences ◽  
Rosa Rugosa ◽  
Antioxidant Efficiency ◽  
Comparison Of The Results

Abstract A new series of amphiphilic compounds with incorporated antioxidant functional group has been investigated. Piperidinium bromides, differing in the alkyl chain length (8, 10, 12, 14 and 16 carbon atoms in the chain) were synthesised to protect biological and/or model membranes against peroxidation and following negative consequences. Their antioxidant activity was studied with erythrocytes subjected to UV radiation. The salts used inhibited lipid oxidation in the erythrocyte membrane. The degree of this inhibition depended on the alkyl chain length of the bromide used and increased with increasing alkyl chain length. A comparison of the results obtained for piperidinium bromides with those obtained for the widely used antioxidant 3,5-di-t-butyl-4-hydroxytoluene (BHT) revealed that only two shortest alkyl chain salts were less efficient than BHT in protecting erythrocyte membranes. A similar comparison with antioxidant efficiency of flavonoids extracted from Rosa rugosa showed that they protected the membranes studied more weakly than the least effective eight-carbon alkyl chain piperidinium bromide. The three compounds of longest alkyl chains were the most active antioxidants. Their activities did not differ significantly.

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