Antioxidant activity of some non-conventional green leafy vegetables of North-East India

2015 ◽  
Vol 8 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Pankaj Saikia ◽  
Dibakar Chandra Deka
Keyword(s):  
Antioxidant Activity ◽  
Leafy Vegetables ◽  
Green Leafy Vegetables ◽  
North East India ◽  
North East

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%.

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.

Higher Intakes of Vegetables, Vitamin E, Manganese and Zinc Are Associated with a Lower Risk of Non-Hodgkin Lymphoma (NHL): Results from a Case-Control Study

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 3771-3771
Author(s):  
Shernan G. Holtan ◽  
Timothy G. Call ◽  
Zachary S. Fredericksen ◽  
Helen M. O’Connor ◽  
Mark Liebow ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin E ◽  
Vitamin A ◽  
Lower Risk ◽  
Beta Carotene ◽  
Case Control ◽  
Leafy Vegetables ◽  
Inverse Association ◽  
Green Leafy Vegetables ◽  
The Mean

Abstract Background: Reactive oxygen species cause DNA damage and altered immunologic responses, and have been linked to the development of NHL. Diets rich in fruits and vegetables are excellent sources of antioxidants, and vitamins C, E, polyphenols, and carotenoids, along with selected micronutrients such as zinc are thought to be responsible for most of the antioxidant activity in foods. We evaluated the hypothesis that vegetables, fruits and nutrients involved in antioxidant activity would protect against developing NHL. In a secondary analysis, we also assessed heterogeneity of this hypothesis for the most common subtypes of NHL: chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), follicular lymphoma, and diffuse large B cell lymphoma (DLBCL). Methods: We evaluated dietary antioxidant intake and NHL risk in a clinic-based study of 416 newly diagnosed NHL cases and 926 frequency-matched controls enrolled at the Mayo Clinic from 2002–2007. Usual diet two years before diagnosis/enrollment was assessed using a self-administered, 128-item food frequency questionnaire. Dietary intake of antioxidants was estimated using the Food Processor SQL system, further supplemented with data from US Department of Agriculture nutrient databases. Unconditional logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CI), adjusted for age, sex, residence, and total energy. NHL subtypes were centrally reviewed, and subtype-specific risks were estimated using polychotomous logistic regression. Results: The mean age at diagnosis was 60.8 years for cases and 57% were male; for controls, the mean age at enrollment was 60.8 years and 54% were men. NHL risk was inversely associated with intake of total vegetables (OR for highest compared to lowest quartile, 0.46; 95% CI 0.32–0.68; p-trend<0.001), and specifically green leafy (OR=0.54; 95% CI 0.39–0.76; p-trend<0.001) and cruciferous (OR=0.62; 95% CI 0.43–0.88; p-trend=0.02) vegetables, but not legumes or red/yellow/orange vegetables. There was no association with total fruit intake or intake of citrus fruits in particular. When modeled together, the association for green leafy vegetables was unchanged while the association for cruciferous vegetables attenuated (OR=0.75; 95% CI 0.50–1.13; p-trend=0.3). Higher intake of total vitamin A (OR=0.60; 95% CI 0.41–0.88; p-trend<0.001) and vitamin E (OR=0.53; 95% CI 0.34–0.82; p-trend<0.001), but not vitamin C, were associated with lower NHL risk. For vitamin A, there was no association with preformed Vitamin A, but there was an inverse association with beta-carotene (OR=0.56; 95% CI 0.39–0.81; p-trend<0.001); only weak inverse associations were observed for other carotenoids (lutein/zeaxanthin, lycopene, and cryptoxanthin). When modeled together, the inverse association for vitamin E was unchanged while the association for beta-carotene attenuated. For micronutrients, there were inverse associations for manganese (OR=0.60; 95% CI 0.40–0.90; p-trend=0.02), selenium (OR=0.47; 95% CI 0.27–0.80; p-trend=0.01), and zinc (OR=0.46; 95% CI 0.27–0.80; p-trend<0.001) but not copper; when modeled simultaneously, both manganese (p-trend=0.03) and zinc (p-trend=0.02) remained significantly and inversely associated with NHL risk. Further adjustment for education, family history of NHL, smoking, alcohol use, and body mass index did not alter these results. There was no NHL subtype heterogeneity for the associations with total vegetables, green leafy vegetables or vitamin E, while inverse associations were not observed for manganese and follicular lymphoma or zinc and CLL/SLL. Conclusion: Higher intakes of vegetables, particularly green leafy vegetables, vitamin E, manganese, and zinc were associated with lower risk of NHL. These finding extend a growing literature from case-control and cohort studies that support a protective role of foods and nutrients that function in antioxidant related pathways against development of NHL, and therefore may represent one of the few known modifiable risk factors for this cancer.

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.

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
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