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X Demographics
Mendeley readers
Attention Score in Context
| Title |
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 | |
| Authors |
Chamira Dilanka Fernando, Preethi Soysa |
| Abstract |
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. |
X Demographics
The data shown below were collected from the profiles of 8 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Australia | 1 | 13% |
| United States | 1 | 13% |
| Costa Rica | 1 | 13% |
| Unknown | 5 | 63% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 4 | 50% |
| Practitioners (doctors, other healthcare professionals) | 2 | 25% |
| Scientists | 2 | 25% |
Mendeley readers
The data shown below were compiled from readership statistics for 166 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Indonesia | 1 | <1% |
| Unknown | 165 | 99% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 35 | 21% |
| Student > Master | 16 | 10% |
| Researcher | 13 | 8% |
| Student > Ph. D. Student | 12 | 7% |
| Student > Postgraduate | 8 | 5% |
| Other | 23 | 14% |
| Unknown | 59 | 36% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 25 | 15% |
| Biochemistry, Genetics and Molecular Biology | 14 | 8% |
| Engineering | 11 | 7% |
| Chemical Engineering | 11 | 7% |
| Chemistry | 8 | 5% |
| Other | 25 | 15% |
| Unknown | 72 | 43% |
Attention Score in Context
This research output has an Altmetric Attention Score of 27. 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 14 June 2022.
All research outputs
#1,302,717
of 23,973,980 outputs
Outputs from Nutrition Journal
#350
of 1,456 outputs
Outputs of similar age
#17,248
of 265,964 outputs
Outputs of similar age from Nutrition Journal
#10
of 37 outputs
Altmetric has tracked 23,973,980 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 94th percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,456 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 37.6. This one has done well, scoring higher than 76% 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 265,964 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 93% of its contemporaries.
We're also able to compare this research output to 37 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 75% of its contemporaries.