Evidence map›Paper›PMID 35223940›Full record

ArticleFrontiers in nutrition2022

Extraction of Squalene From Tea Leaves (

Yue Yue Sheng, Jing Xiang, Kai Rong Wang, Ze Yu Li, Kai Li, Jian Liang Lu, Jian Hui Ye, Yue Rong Liang, Xin Qiang Zheng

Open access · goldAbstract read
In one paragraph

Article in Frontiers in nutrition, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
2.1field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed, 16 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Enhancing Centelloside Production inPlants (Basel, Switzerland) · 2023
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

Yue Yue ShengTea Research Institute, Zhejiang University, Hangzhou, China.
Jing XiangTea Research Institute, Zhejiang University, Hangzhou, China.
Kai Rong WangForest Technology Extension Center, Ningbo Agricultural and Rural Affairs Bureau, Ningbo, China.
Ze Yu LiTea Research Institute, Zhejiang University, Hangzhou, China.
Kai LiTea Research Institute, Zhejiang University, Hangzhou, China.
Jian Liang LuTea Research Institute, Zhejiang University, Hangzhou, China.
Jian Hui YeTea Research Institute, Zhejiang University, Hangzhou, China.
Yue Rong LiangTea Research Institute, Zhejiang University, Hangzhou, China.
Xin Qiang ZhengTea Research Institute, Zhejiang University, Hangzhou, China.
Tea Research Institute · CNZhejiang University · CNNingbo Science and Technology Bureau · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Squalene is a precursor of steroids with diverse bioactivities. Tea was previously found to contain squalene, but its variation between tea cultivars remains unknown. In this study, tea leaf squalene sample preparation was optimized and the squalene variation among 30 tea cultivars was investigated. It shows that squalene in the unsaponified tea leaf extracts was well separated on gas chromatography profile. Saponification led to a partial loss of squalene in tea leaf extract and so it is not an essential step for preparing squalene samples from tea leaves. The tea leaf squalene content increased with the maturity of tea leaf and the old leaves grown in the previous year had the highest level of squalene among the tested samples. The squalene levels in the old leaves of the 30 tested cultivars differentiated greatly, ranging from 0.289 to 3.682 mg/g, in which cultivar "Pingyun" had the highest level of squalene. The old tea leaves and pruned littering, which are not used in tea production, are an alternative source for natural squalene extraction.

Indexed as

Camellia sinensisGC-MSleaf maturitysaponificationsqualene

Identifiers

PMID35223940
PMCPMC8866563
OpenAlexW4210962965

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.