scholarly journals Synthesis and antioxidant activity of two novel tetraphenolic compounds derived from toluhydroquinone and tertiary butylhydroquinone

2014 ◽  
Vol 65 (2) ◽  
pp. e016 ◽  
Author(s):  
X. C. Weng ◽  
Z. W. Jiang ◽  
Y. Huang ◽  
J. P. Hou ◽  
X. Y. Liao
Keyword(s):  
Antioxidant Activity ◽  
Tertiary Butylhydroquinone

Characterization and antioxidant activity of the complexes of tertiary butylhydroquinone with β-cyclodextrin and its derivatives

2018 ◽  
Vol 260 ◽  
pp. 183-192 ◽  
Author(s):  
Hongyu Pu ◽  
Qiaomei Sun ◽  
Peixiao Tang ◽  
Ludan Zhao ◽  
Qi Li ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Tertiary Butylhydroquinone

scholarly journals Ekstraksi senyawa fenolik dari limbah kulit kacang tanah (Arachis Hypogea L) sebagai antioksidan alami

2018 ◽  
Vol 10 (3) ◽  
pp. 112 ◽  
Author(s):  
Yosophine Sulistyani ◽  
Steven Andrianto ◽  
Nani Indraswati ◽  
Aning Ayucitra
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Extraction Temperature ◽  
Peanut Shell ◽  
Tertiary Butylhydroquinone ◽  
Synthetic Antioxidant ◽  
Arachis Hypogea

Phenolic compound extraction from peanut shell for natural anti-oxidant Peanut shell contains phenolic compounds which may be used as natural antioxidants. The content of polyphenols in peanut shells is around 3.34-7.13%. Antioxidants may inhibit the process of food damage caused by oxidation since they can counteract the free radicals. The purpose of this research was to study the effect of extraction temperature and extraction time on the yield, total phenolic content (TPC), and antioxidant activity of extracts. Antioxidant activity of extracts were compared to those of synthetic antioxidant TBHQ (tertiary butylhydroquinone). The results showed that the higher the temperature and the longer time of extraction results in the higher yield of extract, phenolic content, and also yield of phenolic. The yield increased to a certain level and then decreased. The highest yield of phenolic (0.6534 g GAE/100 g peanut shell) was obtained at extraction temperature of 70 oC for 105 minutes. The antioxidant activity of extract also comparable to those of synthetic antioxidant TBHQ which was 97.98%. Keywords: peanut shell, antioxidants, phenolic compounds AbstrakKulit kacang mengandung senyawa fenolik yang bersifat antioksidan. Kandungan polifenol dalam kulit kacang sekitar 3,34-7,13%, oleh sebab itu kulit kacang tanah dapat diolah lebih lanjut sebagai sumber antioksidan alami. Antioksidan dapat menghambat proses kerusakan bahan pangan yang disebabkan oleh proses oksidasi dan mampu menangkal radikal bebas. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh suhu dan waktu ekstraksi terhadap perolehan, kadar senyawa fenolik dan aktivitas antioksidan dalam proses ekstraksi senyawa fenolik dari kulit kacang tanah. Suhu dan waktu ekstraksi yang optimum ditentukan dari perolehan senyawa fenolik yang terbesar. Dalam penelitian ini, aktivitas antioksidan dari ekstrak dibandingkan terhadap aktivitas antioksidan sintetis TBHQ (tertiary butylhydroquinone). Berdasarkan hasil penelitian didapatkan bahwa semakin tinggi suhu dan semakin lama waktu ekstraksi maka dihasilkan perolehan ekstrak, kadar senyawa fenolik, dan perolehan fenolik yang semakin tinggi. Perolehan akan meningkat sampai batas tertentu kemudian mengalami penurunan. Ekstrak kulit kacang dengan perolehan fenolik terbesar (0,6534 g GAE/100 g kulit kacang) diperoleh pada proses ekstraksi dengan kondisi suhu ekstraksi 70 oC dan waktu ekstraksi 105 menit. Aktivitas antioksidan dari ekstrak tersebut hampir menyamai aktivitas antioksidan sintetis TBHQ yaitu sebesar 97,98%.Kata kunci: kulit kacang tanah, antioksidan, senyawa fenolik

scholarly journals Diverse cellular actions of tert-butylhydroquinone, a food additive, on rat thymocytes

2017 ◽  
Vol 6 (6) ◽  
pp. 922-929 ◽  
Author(s):  
Norio Kamemura ◽  
Keisuke Oyama ◽  
Kaori Kanemaru ◽  
Kumio Yokoigawa ◽  
Yasuo Oyama
Keyword(s):  
Antioxidant Activity ◽  
Food Additive ◽  
Tertiary Butylhydroquinone

Tertiary butylhydroquinone (TBHQ) is a food additive that possesses antioxidant activity.

Improvement of cytoprotective and antioxidant activity of Rosa canina L. and Salix alba L. by controlled differential sieving process against H2O2-induced oxidative stress in mouse primary splenocytes

2017 ◽  
Vol 87 (3-4) ◽  
pp. 191-200 ◽  
Author(s):  
Nidhal Soualeh ◽  
Aliçia Stiévenard ◽  
Elie Baudelaire ◽  
Rachid Soulimani ◽  
Jaouad Bouayed
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Biological Activities ◽  
Good Alternative ◽  
Activity Levels ◽  
Salix Alba ◽  
Rosa Canina ◽  
Free Process ◽  
Plant Powders ◽  
Sieving Process

Abstract. In this study, cytoprotective and antioxidant activities of Rosa canina (RC) and Salix alba (SA), medicinal plants, were studied on mouse primary splenocytes by comparing Controlled Differential Sieving process (CDSp), which is a novel green solvent-free process, versus a conventional technique, employing hydroethanolic extraction (HEE). Thus, preventive antioxidant activity of three plant powders of homogeneous particle sizes, 50–100 µm, 100–180 µm and 180–315 µm, dissolved directly in the cellular buffer, were compared to those of hydroethanolic (HE) extract, at 2 concentrations (250 and 500 µg/mL) in H2O2-treated spleen cells. Overall, compared to HE extract, the superfine powders, i. e., fractions < 180 µm, at the lowest concentration, resulted in greater reactive oxygen species (ROS) elimination, increased glutathione peroxidase (GPx) activity and lower malondialdehyde (MDA) production. Better antioxidant and preventive effects in pre-treated cells were found with the superfine powders for SA (i. e., 50–100 µm and 100–180 µm, both p < 0.001), and with the intermediate powder for RC (i. e., 100–180 µm, p < 0.05) versus HE extract. The activity levels of catalase (CAT) and superoxide dismutase (SOD) in pretreated splenocytes exposed to H2O2, albeit reduced, were near to those in unexposed cells, suggesting that pretreatment with the fine powders has relatively restored the normal levels of antioxidant-related enzymes. These findings supported that CDSp improved the biological activities of plants, avoiding the use of organic solvents and thus it could be a good alternative to conventional extraction techniques.

Oxalate Content and Antioxidant Activity of Different Ethnic Foods

2021 ◽  
Vol 31 (1) ◽  
pp. 73-79
Author(s):  
Azalia Avila-Nava ◽  
Isabel Medina-Vera ◽  
Pamela Rodríguez-Hernández ◽  
Martha Guevara-Cruz ◽  
Pamela K. Heredia-G Canton ◽  
...  
Keyword(s):  
Antioxidant Activity

Synthesis and antioxidant activity of 3-(3,4-dihydroxyphenyl)glyceric acid. Monomer of a biologically active polyether isolated from Symphytum asperum and S. caucasicum

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
M Merlani ◽  
V Barbakadze ◽  
L Gogilashvili ◽  
L Amiranashvili ◽  
K Mulkijanyan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Biologically Active ◽  
Glyceric Acid

The effect of steaming on the free amino acid contents and antioxidant activity of ginseng

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
EJ Cho ◽  
XL Piao ◽  
MH Jang ◽  
SY Park ◽  
SW Kwon ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Amino Acid Contents

Antioxidant activity of three polyphenol-enriched cocoa products obtained on an industrial scale

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
JL Ríos ◽  
G Schinella ◽  
S Mosca ◽  
E Cienfuegos-Jovellanos ◽  
MA Pasamar ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Industrial Scale ◽  
Cocoa Products

Anticariogenic effects of extracts and fractions of Potentilla recta and their antioxidant activity

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
M Tomczyk ◽  
A Wiater ◽  
M Pleszczyńska
Keyword(s):  
Antioxidant Activity
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