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73 results for “DPPH”
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Research ArticleOpen accessIn the abstractThermodynamic Inference of the Antioxidant Process of Malic Acid and Its Structural AnalogsHan Wu, Wenhao Dong et al.Two structural analogs of Malic Acid (MA), 2-isopropylmalic Acid (2-IPMA), and 3-isopropylmalic Acid (3-IPMA) were recently identified and separated from wine. Although they have been shown to have antioxidant activity, the mechanism of their actions is still unclear. Antioxidant activities of 2-IPMA and MA were tested through DPPH, ABTS, and PTIO methods and the antioxidant-related thermodynamic properties were evaluated using … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 4 · 30 Oct 2024 · 4,824 accessesView PDFCite
Research ArticleOpen accessIn the abstractCultivation of Antioxidant-Producing Endophytic Fungus in Rhizophora apiculata Mangrove PlantsAnthoni Agustien, Putra Santoso, Siti Zaharani Zalamah et al.West Sumatra is known as one of the largest areas of mangrove forests in Indonesia, dominated by Rhizophora. Therefore, there will be huge opportunities to discover new types or strains of endophytes and antioxidant compounds, which play an important role in protecting cells caused by free radicals, preventing oxidation, and protecting the human body from ROS. This study aims to … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 4 Aug 2024 · 4,991 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntioxidant and Antibacterial Properties of Essential Oils from Citrus reticulata cv. Shatangju Peel for the Preservation of Chilled PorkYao Dong, Xintong Zou, Hongli Zhou et al.Citrus reticulata cv. Shatangju peel essential oil (CrspEo), with three major components D-limonene (88.15%), γ-terpinene (4.59%) and β-myrcene (2.62%), possessed antioxidant activities with DPPH and ABTS+ radical scavenging with the IC50 (concentration of CrspEo scavenging 50% of radical) of 9.87±0.12% and 0.48±0.02%, respectively. Meanwhile, CrspEo showed antimicrobial activity in suppressing the growth of Bacillus pumilus, Bacillus subtilis, Candida albicans, Escherichia … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 3 · 31 Jul 2024 · 4,748 accessesView PDFCite
Research ArticleOpen accessIn the abstractPreparation of Rose Vinegar Rich in Gamma-Linolenic Acid and Analysis of its Nutritional Composition and Antioxidant ActivityYao Zhang, Qing Liu et al.Despite the rapid development of various types of fruit vinegar or nutrient-fortified vinegar, the weakened functions or high cost is still the main limiting factor for healthy vinegar. In the present study, a new type of rose vinegar was obtained from raw grain supplemented with natural extract of roses through the cooperative fermentation of multiple microorganisms by adding Mucor circinelloides … …American Journal of Biochemistry and Biotechnology, Vol. 19, Issue 3 · 8 Aug 2023 · 6,388 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Ultra-High Pressure Technology on Isomerization and Antioxidant Activity of Lycopene in Solanum LycopersicumSiqun Jing, Zainixi Lasheng, Saisai Wang, Hui ShiTo evaluate the influence of the Ultra-High Pressure processing (UHP) on the isomerization and antioxidant activity of lycopene in tomatoes (Solanum lycopersicum), High Performance Liquid Chromatography (HPLC) and Ultraviolet-Visible Spectroscopy (UV-Vis) were used to separate and identify the isomer of lycopene. The scavenging activities against DPPH∙and∙OH present samples with and without UHP treatment were tested with ascorbic acid as positive … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 2 · 21 Jun 2020 · 7,225 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Oak Chip Treatments on Quality of Dry White Wines During AgingRongbin Li, Xiaofang Liang, Chunhua Song et al.The objective of the research was to evaluate the effect of different oak chip treatments on quality of Longyan dry white wine during aging. Phenolic substances, antioxidant activity and Cu2+ reduction force were measured. The results showed that wines treated with French oak chips (6 g/L) had significantly higher contents of total phenols (0.083 mg/mL) and flavonoids (0.063 mg/mL), also … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 1 · 26 Feb 2020 · 7,235 accessesView PDFCite
Research ArticleOpen accessIn the abstractTo Optimize the Brewing Process of Leaf Tea from Hippophae Rhamnoides Linn by the Antioxidant Activity and to Explore its Anticoagulant ActivityYunwen Zhu, Limei Ran, Hongli ZhouToimprove the edible value of Hippophae RhamnoidesLinn. Leaf (HRLL), investigates the optimal brewing conditions and changespeople's brewing habits, and makes better use of resources. The effects ofdifferent parameters (brewing times, brewing time, temperature, andsolid-liquid ratio) on the brewing process of HRLL tea were optimized byresponse surface methodology with antioxidant activity as an indicator.The optimal process was as follows: The brewing … …American Journal of Biochemistry and Biotechnology, Vol. 18, Issue 4 · 14 Nov 2022 · 5,612 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Antioxidant and Antibacterial Activities of the Polysaccharides from Mycelium and the Culture Medium of Pleurotus Eryngii Strain UN-1Qing Liu, Haodong Wu, Ying Wu et al.Pleurotus eryngii was one of the most precious and ordinary edible mushrooms, and its polysaccharides were the major active substances. In this study, P. eryngii strain UN-1 was cultured in a liquid medium at 25℃ under a shaking of 80 rpm for 7 days. Two crude polysaccharides named CPN and CPNM were obtained from the mycelium of P. eryngii UN-1 … …American Journal of Biochemistry and Biotechnology, Vol. 18, Issue 3 · 19 Jul 2022 · 6,176 accessesView PDFCite
Research ArticleOpen accessIn the abstractCrude Extract of Blue-Green Pigment Derived from the Marine Bacterium Pseudomonas aeruginosa P1.S9 has Antibacterial, Antioxidant, and Cytotoxic ActivitiesAris Tri Wahyudi, Rahmah Nursari, Widya Esti Purwaningtyas et al.Pigment derived from marine bacteria is one of the alternative sources of natural products characterized by beneficial functions for pharmaceutical purposes. This study aimed to evaluate the antimicrobial, antioxidant and cytotoxic activities of the marine bacterium Pseudomonas aeruginosa P1. S9 crude pigment extract and identify its chemical content. Crude pigment extract of this bacterium showed promising antibacterial activities against Pseudomonas … …OnLine Journal of Biological Sciences, Vol. 22, Issue 1 · 4 Mar 2022 · 6,994 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntioxidant, Analgesic and Anti-inflammatory Effects of Ethanolic Extract of Moroccan Lavandula stoechas L.Hind Ferehan, Mehdi Ait Laaradia, Sara Oufquir et al.Lavandula stoechas L. is a widely used medicinal plant. In Moroccan traditional medicine, it is employed for the treatment of different illness and as an anxiolytic, analgesic or anti-inflammatory remedy. The purpose of this investigation was to assess the antioxidant, antinociceptive and anti-inflammatory effects of the ethanolic extract of Moroccan Lavandula stoechas L. in animal models. Therefore, in vitro anti-oxidant … …OnLine Journal of Biological Sciences, Vol. 21, Issue 4 · 15 Feb 2022 · 5,889 accessesView PDFCite