scholarly journals Changes in major catechins, caffeine, and antioxidant activity during CTC processing of black tea from North East India

RSC Advances ◽  
2021 ◽  
Vol 11 (19) ◽  
pp. 11457-11467
Author(s):  
Himangshu Deka ◽  
Podma Pollov Sarmah ◽  
Arundhuti Devi ◽  
Pradip Tamuly ◽  
Tanmoy Karak
Keyword(s):  
Antioxidant Activity ◽  
Black Tea ◽  
Total Polyphenol ◽  
North East India ◽  
North East

Changes in catechins, caffeine, total polyphenol, theaflavins, and antioxidant activity during CTC processing of black tea from North East India cultivar were studied. Total polyphenol decreased up to 37% with the formation of theaflavins up to 1.8%.

Polyphenolic compounds and antioxidant activity of CTC black tea of North-East India

2013 ◽  
Vol 141 (4) ◽  
pp. 3744-3751 ◽  
Author(s):  
Lakshi Prasad Bhuyan ◽  
Santanu Sabhapondit ◽  
Binoti Devi Baruah ◽  
Cinmoy Bordoloi ◽  
Ramen Gogoi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Black Tea ◽  
Polyphenolic Compounds ◽  
North East India ◽  
North East

In vitro study on antioxidant activity and phenolic content of three Piper species from North East India

2013 ◽  
Vol 52 (1) ◽  
pp. 117-128 ◽  
Author(s):  
Chandan Tamuly ◽  
Moushumi Hazarika ◽  
Jayanta Bora ◽  
Manobjyoti Bordoloi ◽  
Manas P. Boruah ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
In Vitro Study ◽  
Vitro Study ◽  
North East India ◽  
North East

Capsaicinoid: A potential antioxidant with close interactions against human iNOS in docking study

2014 ◽  
Vol 4 (4) ◽  
pp. 207-214
Author(s):  
R. Hazarika ◽  
K. Sood ◽  
B. Neog
Keyword(s):  
Antioxidant Activity ◽  
Active Sites ◽  
Docking Study ◽  
Capsicum Chinense ◽  
Docking Analysis ◽  
North East India ◽  
North East ◽  
Oxide Synthase ◽  
Bhut Jolokia ◽  
Inducible Nitric Oxide

Capsicum chinense, popularly known as Bhut jolokia, was collected from three states of North-East India and was studied for variation in its pungency principal viz. capsaicinoid content and antioxidant activity as well as its inter-action affinity with human inducible nitric oxide synthase (iNOS) active sites. HPLC fingerprinting analysis showed capsaicin and dihydrocapsaicin as the major active compounds present in the capsaicinoid extract of C. chinense. In comparison to dihydrocapsaicin, capsaicin was found in high amount. The pungency range was observed between 3, 47,301 SHU to 8, 45,296 SHU in the collected samples. The capsaicinoid extract exhibited antioxidant activity with 46.24 ± 15.34% scavenging of DPPH free radical at 100 ppm. The dock-ing analysis showed that capsaicin interacted more with the active sites of iNOS compared to dihydrocapsaicin. Present investigation revealed considerable difference in capsaicinoid content among the samples collected from three states of North-East India. The capsaicinoid showed noticeable antioxidant activity with potent binding affinity to the active sites of iNOS in the molecular docking analysis.

scholarly journals A New Diphenyl Ether Glycoside from Xylosma longifolium Collected from North-East India

2017 ◽  
Vol 12 (8) ◽  
pp. 1934578X1701200
Author(s):  
Ningombam Swapana ◽  
Masaaki Noji ◽  
Rina Nishiuma ◽  
Masahiro Izumi ◽  
Hiroshi Imagawa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Heteronuclear Nmr ◽  
Diphenyl Ether ◽  
Data Interpretation ◽  
Meoh Extract ◽  
North East India ◽  
North East ◽  
Nmr Data

A new diphenyl ether glycoside, xylosmaloside (1), was isolated from the MeOH extract of Xylosma longifolium Clos. The structure of xylosmaloside (1) was elucidated using MS analyses, extensive 2D-homo and heteronuclear NMR data interpretation and the chemical conversions. Xylosmaloside (1) showed stronger antioxidant activity than ascorbic acid.

Assessment of Antioxidant Activity of SixFicusSpecies—Underutilized Fruits from Arunachal Pradesh in North East India

2014 ◽  
Vol 15 (1) ◽  
pp. 85-99 ◽  
Author(s):  
Chandan Tamuly ◽  
Rubul Buragohain ◽  
Moushumi Hazarika ◽  
Jayanta Bora ◽  
P. R. Gajurel
Keyword(s):  
Antioxidant Activity ◽  
Arunachal Pradesh ◽  
North East India ◽  
North East

scholarly journals Phytochemical screening of macrolichens Acroscyphus sphaerophoroides andDirinaria consimilis from North East India for antioxidant and antibacterial activities

2018 ◽  
Author(s):  
Rupam P. Debnath ◽  
Nripendranath Mandal ◽  
Jayashree Rout
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Iron Chelation ◽  
Antibacterial Activities ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
North East India ◽  
North East ◽  
Fruticose Lichen ◽  
Foliose Lichen

This report deals with studies related to phytochemical screening, antioxidant potential and antibacterial activity of two macrolichens Acroscyphus sphaerophoroides Lev., a fruticose lichen and Dirinaria consimilis (Stirton) D.D. Awasthi, a foliose lichen. Qualitative phytochemical analysis showed the presence of alkaloids, terpenoids, saponins, glycosides, tannins and phenols. Acroscyphus sphaerophoroides and Dirinaria consimilis showed relatively antioxidant activity as revealed by DPPH study. A moderate iron chelation has been noted. Both the species showed antibacterial activity against gram-positive bacterial strain Staphylococcus aureus.

Sign in / Sign up

Export Citation Format

Share Document