Results 11 to 20 of about 75,689 (262)
The Chemistry of DPPH· Free Radical and Congeners [PDF]
International Journal of Molecular Sciences, 2021 Since the discovery in 1922 of 2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydrazyl stable free radical (DPPH·), the chemistry of such open-shell compounds has developed continuously, allowing for both theoretical and practical advances in the free radical chemistry area.
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A kinetic-based stopped-flow DPPH• method
Scientific Reports, 2023 AbstractThe reaction kinetics of antioxidants with free radicals is crucial to screen their functionality. However, studying antioxidant-radical interactions is very challenging for fast electron-donor substances, such as ascorbic acid, because the reaction ends in a few seconds.
Lucrezia Angeli +2 more
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Magnetic Interaction in Solvent-free DPPH and DPPH–Solvent Complexes [PDF]
Bulletin of the Chemical Society of Japan, 1981 Abstract Magnetic interaction in solvent-free DPPH and DPPH–solvent complexes has been studied by means of measurements of the magnetic susceptibility, the proton magnetic resonance, and the low-field ESR at very low temperatures. The susceptibility of solvent-free DPPH shows a round maximum at 11 K, and then it decreases with a lowering
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Potensi Antioksidan Rumput Laut Gracilaria verrucosa Dari Pantai Gunung Kidul, Yogyakarta
Jurnal Kelautan Tropis, 2019 Gracilaria verrucosa is red algae that has been widely used as an antioxidant. This research was conducted to test antioxidant activity, total phenolic content and bioactive compound of Gracilaria verrucosa obtained from Pok Tunggal Beach and Ngandong ...
Wahyu Febrianto +4 more
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Infusiones de plantas medicinales: Actividad antioxidante y fenoles totales
Agroindustrial Science, 2020 Las infusiones son consumidas como bebidas sociales para aliviar dolencias y como parte de la cultura por siglos. El objetivo de la investigación es evaluar la capacidad antioxidante (DPPH y ABTS°+) y fenoles totales de infusiones preparadas con plantas ...
Elizabeth Ordoñez +2 more
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Jurnal Kimia Sains dan Aplikasi, 2020 Curcuma xanthorrhiza Roxb (temulawak) is a native Indonesian plant; ethnobotanically, it can facilitate breast milk, body fresheners, stomach lozenges, and seizure medications.
Sari Purbaya +2 more
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Aktivitas Penangkapan Radikal Bebas DPPH dan Daya Reduksi Ekstrak Gracilaria verrucosa
JRST: Jurnal Riset Sains dan Teknologi, 2020 Gracilaria verrucosa adalah salah satu jenis rumput laut merah yang memiliki kandungan bioaktif untuk antioksidan alami. Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan yang terkandung di dalam Gracilaria verrucosa dengan menggunakan dua ...
Anggi Setiabudi +2 more
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Phytochemical constituents of Centotheca lappacea (L.) Desv. determined with online DPPH assay coupled to LC-ESI-QTOF-MS and headspace GC-MS [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2021 Centotheca lappacea (L.) Desv. or “hee yum” grass has been used in Thailand for postpartum care. This study focused on analyses of elements, antioxidants and volatile compounds from C. lappacea.
Genet Minale +7 more
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Bioscience Journal, 2019 This study evaluated the total polyphenols content and the antioxidant activity of the infusion prepared with leaves from Achillea millefolium L. plants treated with salicylic acid (SA).
Pedro Henrique Gorni +5 more
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Jurnal Kimia Riset, 2020 Turi (Sesbania grandiflora (L.) Pers.) merupakan jenis tanaman yang tersebar luas di wilayah Indonesia dan termasuk dalam famili Fabaceae serta memiliki potensi sebagai antioksidan alami.
Jamilatur Rohmah +6 more
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