Article
Food Science & Technology
Eugenia Telis de Vilela Silva, Alexandre Jose Melo de Queiroz, Rossana Maria Feitosa de Figueiredo, Henrique Valentim Moura, Francislaine Suelia dos Santos, Aline Priscila de Franca Silva, Cristina Fernandes Cavalcanti, Mailson Goncalves Gregorio, Pluvia Oliveira Galdino, Josivanda Palmeira Gomes
Summary: Germinated peanut flours produced through convective drying at 70 degrees C showed high levels of minerals, total phenolic compounds, and antioxidant potential. The BRS Havana cultivar exhibited elevated levels of flavonoids, while the BR1 cultivar was more susceptible to degradation reactions during storage at higher temperatures.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Agriculture, Multidisciplinary
Alondra M. Idrovo-Encalada, Ana M. Rojas, Eliana N. Fissore, Piercosimo Tripaldi, Reinaldo Pis Diez, Cristian Rojas
Summary: This article introduces a quantitative structure-activity relationship (QSARs) method for investigating the antioxidant activity and establishes a database of 165 compounds for predicting new antioxidant compounds. By building a multiple linear regression model with five descriptors, a satisfactory prediction performance is achieved, and a mechanism explanation and applicability domain are provided.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Acoustics
Natasa Milicevic, Predrag Kojic, Marijana Sakac, Aleksandra Misan, Jovana Kojic, Camila Perussello, Vojislav Banjac, Milica Pojic, Brijesh Tiwari
Summary: This study investigated the extraction of phenolics from wheat and oat bran using ultrasound technology. The kinetics of ultrasound-assisted extraction and subsequent stirring of total phenolic compounds were analyzed using Peleg's mathematical model. SEM analysis was used to study the surface morphology of cereal brans after extraction. The results showed that the TPC extraction kinetics was dependent on the K1/2 constant, indicating differences in bran composition and the influence of US pretreatment on the samples.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Food Science & Technology
Iman Golpour, Ana Cristina Ferrao, Fernando Goncalves, Paula M. R. Correia, Ana M. Blanco-Marigorta, Raquel P. F. Guine
Summary: This research study focused on evaluating the total phenolic compounds and antioxidant activity of strawberries under different experimental extraction conditions using Artificial Neural Networks (ANNs). The results indicated that ANN is a potential method for estimating the targeted compounds and activity of strawberries, showcasing its effectiveness in predicting health benefits.
Review
Polymer Science
Pieter Gijsman, Rudinei Fiorio
Summary: This study focuses on the degradation and stabilization of pristine polypropylene (PP) and its significance in recycling. Post-consumer PP has different chemical structures due to degradation, which affects its thermo-oxidative stability. The review outlines the chemical reactions causing PP degradation and the mechanisms of action of important stabilizers to support mechanical recycling. The heterogeneous degradation of PP, its infectious spreading, and the influence of stabilizers are emphasized, as they are crucial for proper stabilization and recyclability of PP in its first lifetime cycle.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Biochemistry & Molecular Biology
Alyne Lizane Cardoso, Luciane de Lira Teixeira, Neuza Mariko Aymoto Hassimotto, Sheyla de Liz Baptista, Candice Lais Knoner Copetti, Debora Kurrler Rieger, Francilene Gracieli Kunradi Vieira, Gustavo Amadeu Micke, Luciano Vitali, Maria Alice Altenburg de Assis, Mayara Schulz, Roseane Fett, Edson Luiz da Silva, Patricia Faria Di Pietro
Summary: This clinical trial evaluated the absorption and excretion of bioactive compounds in jucara juice and its antioxidant capacity in human serum. The study found that several phenolic acids and conjugated phenolic acids were excreted in urine, and jucara juice decreased the total oxidant status of serum. These findings suggest a relationship between the production of metabolites and the antioxidant capacity of jucara juice.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Food Science & Technology
Yaosheng Lin, Daobang Tang, Xueming Liu, Jingrong Cheng, Xuping Wang, Dongliang Guo, Jinhao Zou, Huaigu Yang
Summary: This study evaluated the phenolic content and antioxidant capacity of ten Chinese longan cultivars, and found that 'Dingyuan' had the highest phenolic content and exhibited strong antioxidant activity. There was a strong correlation between polyphenol abundance and antioxidant activity.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Lucrezia Angeli, Sebastian Imperiale, Yubin Ding, Matteo Scampicchio, Ksenia Morozova
Summary: A novel stoichio-kinetic model was applied in this study to monitor the consumption of DPPH center dot by common antioxidants, yielding rate constants k(1) and k(2) to describe the main and side reactions. This approach was used to evaluate the antioxidant activity of various compounds and herbal extracts, providing insights into the kinetics of the reactions. The study suggests a new kinetic approach to standardize the common DPPH center dot assay for the determination of antioxidant activity.
Article
Biochemistry & Molecular Biology
Lara Franco dos Santos, Barbara Biduski, Samuel Teixeira Lopes, Telma Elita Bertolin, Luciana Ruschel dos Santos
Summary: The extraction of bioactive compounds from fruit pomace is an environmentally friendly solution for the disposal of abundant and low-value by-products. This study evaluated the antimicrobial potential of pomace extracts from Brazilian native fruits and their effect on film properties and the release of antioxidants and phenolic compounds. The films with butia extract showed the lowest mechanical resistance but the highest elongation. The extracts and films exhibited antimicrobial activity against several bacteria, with varying levels of inhibition. The phenolic compounds were released from the film matrix, and the fatty-food simulator demonstrated controlled release of antioxidant compounds.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Food Science & Technology
Virendra K. Rathod
Summary: This study demonstrates the extraction of total phenolic compounds from waste Syzygium cumini leaves using the ultrasound-assisted aqueous extraction technique. The optimized parameters for extraction resulted in high yields of total phenolic contents and total flavonoid contents. Compared to the traditional Soxhlet technique, the ultrasound-assisted aqueous extraction process has significantly lower cost and energy requirement. The extracted compounds show antioxidant, enzyme inhibition, and anticancer activities, suggesting their potential applications in treating oxidative stress, diabetes, and cancer.
Review
Biochemistry & Molecular Biology
Yoko Matsumura, Masahiro Kitabatake, Shin-ichi Kayano, Toshihiro Ito
Summary: Oxidative stress can cause diseases, but antioxidants in foods can prevent diseases and delay aging. Phenolic compounds, such as flavonoids, are present in plants and contribute to the bitterness and color of foods. Dietary phenolic compounds exhibit antioxidant activity and can prevent cell aging and diseases. The structures of these compounds can be changed by intestinal bacteria metabolism, and the resulting metabolites exert effects in vivo.
Review
Food Science & Technology
Zilanir Carvalho Pereira, Josias Martins dos Anjos Cruz, Renilto Frota Correa, Edgar Aparecido Sanches, Pedro Henrique Campelo, Jaqueline de Araujo Bezerra
Summary: This review focuses on the chemical composition, health benefits, and products derived from the pulps of Passiflora spp. over the last 5 years. Phenolic acids and polyphenols were among the major organic compounds found in the pulps of Passiflora spp. The fruits demonstrated antioxidant properties as well as inhibition of alpha-amylase and alpha-glucosidase enzymes. These findings indicate the potential use of Passiflora spp. in developing a variety of products, especially non-dairy beverages, to meet consumer demand for alternatives. Sensory analysis and in vivo tests are encouraged to further explore the development of pharmaceutical and food products with high value. Patents also show considerable interest in research and product development in various food technology areas, as well as biotechnology, pharmacy, and materials engineering.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Food Science & Technology
Tawanda Tayengwa, Obert C. Chikwanha, Jeannine Neethling, Michael E. R. Dugan, Timothy Mutsvangwa, Cletos Mapiye
Summary: Feeding dried grape pomace (DGP) or citrus pulp (DCP) increased CLA, n-3 and n-6 PUFA, and reduced concentrations of aldehydes, ketones, and alcohols in beef, while also resulting in less tender meat compared to control diet.
FOOD RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Applied
Haitian Fang, Xiuxiu Yin, Jiequn He, Shihua Xin, Huiling Zhang, Xingqian Ye, Yunyun Yang, Jinhu Tian
Summary: The study investigated the effects of different cooking methods on the phytochemicals and antioxidant activities of potatoes from different varieties. The results showed that frying, roasting, and air-drying had a more significant negative impact on the nutrients and antioxidant activities of potatoes compared to steaming or microwaving. Zhongshubahao variety may be an ideal potato sample in terms of retaining phytochemicals and antioxidant activities.
Article
Food Science & Technology
Wellington Mamoro Umeda, Neuza Jorge
Summary: The study found that the combination of purple onion peel extract with synthetic antioxidants can delay the oxidation reaction during the storage of soybean oil, potentially reducing the concentration of synthetic antioxidants used.
Article
Materials Science, Characterization & Testing
Eeva Mofakhami, Sylvie Tence-Girault, Jonathan Perrin, Mario Scheel, Laurent Gervat, Cristian Ovalle, Lucien Laiarinandrasana, Bruno Fayolle, Guillaume Miquelard-Garnier
Article
Polymer Science
Octavie Okamba-Diogo, Francois Fernagut, Jean Guilment, Frederique Pery, Bruno Fayolle, Emmanuel Richaud
POLYMER DEGRADATION AND STABILITY
(2020)
Article
Polymer Science
Pierre-Yves Le Gac, Pierre-Antoine Albouy, Bruno Fayolle, Jacques Verdu
Summary: The study investigates the fatigue life of unfilled polychloroprene rubber under different conditions and network structures, revealing that an increase in crosslink density leads to a decrease in fatigue life in unfilled elastomers. A theoretical energetic approach can predict fatigue lifetime in fully relaxing conditions, while an empirical relationship is proposed for non-relaxing conditions to link fatigue life to the crosslink density of rubber.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Mechanics
R. Kadri, M. Nait Abdelaziz, B. Fayolle, M. Ben Hassine, J. F. Witz
Summary: This study examines the impact of aging on mechanical properties of rubber materials, with modifications to the rubber network structure through crosslinking and chain scission mechanisms. A predictive mechanical tool based on an hyperelastic constitutive model coupled with physical-chemical parameters was proposed to estimate mechanical properties. Relevant indicators of damage for crosslinking or chain scission processes, such as elastically active chains concentrations and swelling rate, were introduced as damage parameters in the mechanical modeling, leading to satisfactory predictions of mechanical behavior and stress-strain estimates at break.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Characterization & Testing
Clement Freymond, Alain Guinault, Carole Charbuillet, Bruno Fayolle
Summary: The thermal degradation of post-consumed ABS/HIPS and PP/PE blends from waste electrical and electronic equipment was investigated by multiple extrusions for recycling purposes. The molar mass, melt flow index, and ultimate elongation of the recycled blends were evaluated as a function of extrusion cycles. The results revealed a similar degradation mechanism for both ABS/HIPS and PP/PE blends, with ABS/HIPS exhibiting higher thermomechanical resistance. An innovative embrittlement criterion based on MFI measurements was proposed for the analysis of post-consumed polymer blends.
Article
Polymer Science
Antoine Bardin, Pierre-Yves Le Gac, Pierre-Antoine Albouy, Herve Bindi, Bruno Fayolle
Summary: By tuning the hydrolysis duration of PEBA, specimens with different macromolecular structures were produced. The impact of phase interconnection changes on strain-induced crystallization (SIC) was studied for a given hard phase structure. The correlation between stress and crystallinity induced under strain was highlighted regardless of the number of chain scissions.
Article
Polymer Science
Sabrina Taourit, Pierre-Yves Le Gac, Bruno Fayolle
Summary: In this study, the impact of chain scission on the tensile properties of elastomers was investigated by aging a polyester-based polyurethane in seawater at different temperatures. The results showed that hydrolysis caused chain scission within the polymer network, leading to changes in the tensile properties. During aging, the stress at break decreased gradually, while the strain at break initially increased and then decreased when the crosslink density was below a critical value. The relationships between the average crosslink density and the ultimate properties were proposed based on the experimental findings.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
S. Lottier, S. Tence-Girault, L. Gervat, N. Saintier, G. Miquelard-Garnier, B. Fayolle
Summary: This study systematically investigates for the first time the effect of hydrolysis and oxidation on the fatigue life of Polyamide 6,6 reinforced with 30 wt% glass fibers. It is found that hydrolysis causes chemical changes throughout the sample, while oxidation effects are localized in a near-surface layer. The fatigue life is significantly decreased with ageing in both cases. The decrease in fatigue life for oxidized samples can be explained by the existence of a brittle layer that does not sustain any stress.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Polymer Science
Clement Freymond, Xavier Mackre-Delannoy, Alain Guinault, Carole Charbuillet, Bruno Fayolle
Summary: The accelerated thermal ageing of ABS films was investigated to determine the cause of their ductile/brittle transition during exposure. Chain scission occurring in the SAN phase was found to be the main process responsible for ABS embrittlement.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Materials Science, Multidisciplinary
Gwladys Lesimple, Ilias Iliopoulos, Jean-Baptiste Marijon, Bruno Fayolle
Summary: PEKK is gaining attention for composites in the aeronautical field. This study provides water transport parameters for PEKK in amorphous and semicrystalline states, including water diffusivity and solubility. Comparisons with PEEK suggest that PEKK absorbs more water due to its polarity.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Applied
Caroline Vibert, Bruno Fayolle, Denise Ricard, Anne-Laurence Dupont
Summary: In order to investigate the combined effects of water and oxygen on the degradation of permanent paper in specific climate conditions, accelerated aging experiments were conducted under three different conditions: humid air, humid nitrogen, and dry air. The degradation state of the paper was evaluated using various techniques, revealing that the cellulose scission rate of the Canson (R) permanent paper was reduced compared to the Whatman No. 40 acidic cotton paper used as a reference. This reduction was attributed to a lower acidification and inhibiting acid-catalyzed hydrolysis due to the presence of alkaline reserve.
CARBOHYDRATE POLYMERS
(2023)
Article
Optics
M. Ayad, S. Uenaldi, M. Scius-Bertrand, C. Le Bras, B. Fayolle, L. Berthe
Summary: This study investigates the behavior of Aluminium tape under high strain rate using laser shock. High power laser is used to create laser shock on the tape, and material models are used to simulate the response. The study also examines the effect of adhesive thickness on the transmitted pressure and the location of maximum tensile stress within the tape. It is found that increasing the adhesive thickness can result in the maximum tensile zone appearing close to the front face.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
C. Le Bras, C. Fosse, L. Delbreilh, M. Gervais, M. Ayad, A. Soumaila Sounakoye, L. Berthe, S. Valadon, B. Fayolle
Summary: This study investigates the mechanical behavior of polycarbonate and polydimethylsiloxane (Sylgard184) under laser shock conditions. The results show that Sylgard184 exhibits glassy behavior under laser shock conditions, while polycarbonate does not show significant changes in behavior. Dielectric relaxation spectroscopy (DRS) measurements further characterize the flow behavior of the polymer chains under extreme conditions.
Article
Materials Science, Multidisciplinary
Sylvie Tence-Girault, Jonathan Quibel, Alexis Cherri, Sebastien Roland, Bruno Fayolle, Stephane Bizet, Ilias Iliopoulos
Summary: PEKK, a semicrystalline polymer, is crucial for applications in aerospace, transportation, electronics, and oil & gas industries due to its properties like thermomechanical and chemical stability linked to its crystalline state. This study proposes a methodology to control and quantify the crystalline state of PEKK by analyzing small-angle X-ray scattering, wide-angle X-ray scattering, and differential scanning calorimetry data. The evolution of crystalline forms and total crystallinity with different crystallization temperatures were discussed, and the melting enthalpy of a 100% crystallized PEKK copolymer was estimated.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Sebastien Roland, Mahdi Moghaddam, Sylvie Tence-Girault, Bruno Fayolle
Summary: The thermo-oxidative behavior and structural changes of PEKK films in solid state were investigated in this study. Long-term aging affects the mechanical properties of PEKK samples, potentially leading to embrittlement and modifications in the crystalline morphology.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)