Results 21 to 30 of about 135,838 (246)

Kinetic behaviour of DPPH radical scavenging activity of tomato waste extracts [PDF]

Journal of the Serbian Chemical Society, 2012
The kinetic behaviour of tomato waste extracts (obtained from six genotypes) and standard antioxidant compounds (ascorbic and caffeic acid) were investigated using 2,2-diphenyl-1-picrylhydrazyl radical test.
Ćetković Gordana S., Čanadanović-Brunet Jasna M., Đilas Sonja M., Savatović Slađana M.   +3 more
doaj   +1 more source

Aktivitas Penangkapan Radikal DPPH (1,1-Diphenyl-2-picrylhydrazyl) Ekstrak Madu Sebelum dan Sesudah Pemanasan

JRST: Jurnal Riset Sains dan Teknologi, 2023
Pemanasan pada suhu dan waktu optimum dapat meningkatkan aktivitas antioksidan pada madu apis dan trigona karena meningkatnya total fenolik, total flavonoid dan pigmen coklat.
La Ode Sumarlin, Anna Muawanah, Amalia Istiqomah, Nurul Amilia, Tarso Rudiana, Sri Yadial Chalid, Hajar Hajar   +6 more
doaj   +1 more source

Aktivitas Peredaman Radikal Bebas Dpph Ekstrak Air dan Ekstrak Etanol Biji Kopi Ateng Karo

, 2022
Background: Ateng Karo coffee beans (Coffea arabica L.) was a coffee plant that belongs to the Rubiaceae family. This coffee beans has various benefits, one of them as an antioxidant.
Febriyana, Sri Eka
core  

DPPH-Scavenging Activities and Structure-Activity Relationships of Phenolic Compounds

Natural Product Communications, 2010
Thirty-eight phenolic compounds (including 31 flavonoids) were examined for their DPPH radical-scavenging activities, and structure-activity relationships were evaluated.
Cheng-Dong Zheng, Gang Li, Hu-Qiang Li, Xiao-Jing Xu, Jin-Ming Gao, An-Ling Zhang   +5 more
doaj   +1 more source

ANTIOXIDANT ACTIVITY LEAVES KATIMAHA (Kleinhovia hospita L.)

Biovalentia: Biological Research Journal, 2022
The free radicals that people face in their daily activities require humans to get additional antioxidants from the outside. To overcome this problem, it is necessary to look for many sources of natural antioxidants considering the need for antioxidants ...
Nova Elda Utami, Salni Salni, Marieska Verawaty   +2 more
doaj   +1 more source

Kinetics of DPPH• scavenging by bacterioruberin from Haloferax alexandrinus GUSF-1 (KF796625)

Journal of Analytical Science and Technology, 2021
This is the first account of the kinetics of free radical scavenging by bacterioruberin obtained from cells of Haloferax alexandrinus GUSF-1(KF796625), grown at optimum conditions of 25% NaCl, pH 7, 42 °C, 150 rpm in NaCl Tryptone yeast extract medium ...
Jyothi Judith Alvares, Irene Jeronimo Furtado   +1 more
doaj   +1 more source

Antioxidant Test and Flavonoids Determination of Tuber Pakis Kinca (Nephrolepis cordifolia (L) C. Presl)

Indonesian Journal of Chemical Analysis, 2023
One of the things that causes cell damage in the body is the formation of unpaired electrons, also known as free radicals, which can cause oxidative stress.
Samsul Hadi, Arif Subekti, Amalia Khairunnisa   +2 more
doaj   +1 more source

Jenis Pelarut Metanol Dan N-Heksana Terhadap Aktivitas Antioksidan Ekstrak Rumput Laut Gelidium sp. Dari Pantai Drini Gunungkidul – Yogyakarta

, 2018
Gelidium sp. the one of red seaweed which has potential as naturalantioxidant. The researh was to know the activity of methanol extract, n-hexane Gelidium sp., and determined totalphenolic compound of pigments (chlorophyll a and carotenoid ...
Gunawan Widi Santosa, Pramesti, Rini, Wilis Ari Setyati, Leksono, Wahyu Bagio, Setyati, Wilis Ari, Santosa, Gunawan Widi, Wahyu Bagio Leksono, Rini Pramesti   +7 more
core   +1 more source

Uji Aktivitas Antioksidan Ekstrak Kayu Bayur Sulawesi (Pterospermum celebicum Miq.) dengan Metode Penangkapan Radikal Bebas DPPH (2,2-diphenyl-1-picryl-hydrazyl)

Journal of Tropical Pharmacy and Chemistry, 2011
An antioxidant activity test of Bayur Sulawesi (Pterospermum celebicum Miq.) wood ekstract by method of the scavenging free radical DPPH (2,2-diphenyl-1-picryl-hydrazyl) had been performed.
Sapri Sapri
doaj   +1 more source

Antioxidant Activity and Phenolic Compound Identification and Quantification in Western Australian Honeys

Antioxidants, 2023
This study reports on the total phenolic content and antioxidant activity as well as the phenolic compounds that are present in Calothamnus spp. (Red Bell), Agonis flexuosa (Coastal Peppermint), Corymbia calophylla (Marri) and Eucalyptus marginata ...
Ivan Lozada Lawag, Md Khairul Islam, Tomislav Sostaric, Lee Yong Lim, Katherine Hammer, Cornelia Locher   +5 more
doaj   +1 more source