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Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing

Overview of attention for article published in Nutrition Journal, July 2015
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (82nd percentile)

Mentioned by

9 tweeters
5 Facebook pages
1 Google+ user


27 Dimensions

Readers on

71 Mendeley
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Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing
Published in
Nutrition Journal, July 2015
DOI 10.1186/s12937-015-0060-x
Pubmed ID

Chamira Dilanka Fernando, Preethi Soysa


Tea is the most consumed beverage in the world which is second only to water. Tea contains a broad spectrum of active ingredients which are responsible for its health benefits. The composition of constituents extracted to the tea brew depends on the method of preparation for its consumption. The objective of this study was to investigate the extraction kinetics of phenolic compounds, gallic acid, caffeine and catechins and the variation of antioxidant activity with time after tea brew is made. CTC (Crush, Tear, Curl) tea manufactured in Sri Lanka was used in this study. Tea brew was prepared according to the traditional method by adding boiling water to tea leaves. The samples were collected at different time intervals. Total phenolic and flavonoid contents were determined using Folin ciocalteu and aluminium chloride methods respectively. Gallic acid, caffeine, epicatechin, epigallocatechin gallate were quantified by HPLC/UV method. Antioxidant activity was evaluated by DPPH radical scavenging and Ferric Reducing Antioxidant Power (FRAP) assays. Gallic acid, caffeine and catechins were extracted within a very short period. The maximum extractable polyphenols and flavanoids were achieved at 6-8 min after the tea brew is prepared. Polyphenols, flavanoids and epigallocatechin gallate showed a significant correlation (p < 0.001) with the antioxidant activity of tea. The optimum time needed to release tea constituents from CTC tea leaves is 2-8 min after tea is made.

Twitter Demographics

The data shown below were collected from the profiles of 9 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 71 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Indonesia 1 1%
Unknown 70 99%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 18 25%
Student > Master 11 15%
Researcher 7 10%
Student > Ph. D. Student 5 7%
Student > Doctoral Student 4 6%
Other 11 15%
Unknown 15 21%
Readers by discipline Count As %
Agricultural and Biological Sciences 15 21%
Biochemistry, Genetics and Molecular Biology 8 11%
Engineering 6 8%
Chemical Engineering 5 7%
Pharmacology, Toxicology and Pharmaceutical Science 4 6%
Other 12 17%
Unknown 21 30%

Attention Score in Context

This research output has an Altmetric Attention Score of 9. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 15 October 2016.
All research outputs
of 15,549,387 outputs
Outputs from Nutrition Journal
of 1,177 outputs
Outputs of similar age
of 235,590 outputs
Outputs of similar age from Nutrition Journal
of 1 outputs
Altmetric has tracked 15,549,387 research outputs across all sources so far. Compared to these this one has done well and is in the 84th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,177 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 29.9. This one has gotten more attention than average, scoring higher than 57% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 235,590 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 82% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them