Qingzhuan tea (QZT) with longer aging year is usually believed to have higher quality and commercial value. In this study, a 20 years sequence of aged QZT were subjected to an electronic tongue and liquid chromatography-mass spectrometry to investigate the effect of storage age on its metabolic profile and taste quality. The changes in both taste quality and metabolic profile exhibited a parabolic trend in the 20 years of QZT aging and reached the maximum at the 10th year. A total of 47 compounds were identified as critical metabolites responsible for the age variation of QZT quality, with the methylation of catechins, glycosylation of flavonoids, degradation of flavoalkaloids, biosynthesis of triterpenoids, and formation of theabrownins. These results suggested that the taste of QZT was improved after 10 years of storage, with the reduction of bitterness and astringency and a general increase of key quality-related compounds.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2021.129953 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Different expression of circulating microRNA profile in tibetan OSAHS with metabolic syndrome patients.
Sci Rep
January 2025
Department of Respiratory medicine, Taian 88 Hospital, Taian, 271000, People's Republic of China.
Recent empirical investigations reinforce the understanding of a profound interconnection between metabolic functions and Obstructive Sleep Apnea-hypopnea Syndrome (OSAHS). This study identifies distinctive miRNA signatures in OSAHS with Metabolic Syndrome (Mets) patients from healthy subjects, that could serve as diagnostic biomarkers or describe differential molecular mechanisms with potential therapeutic implications. In this study, OSAHS with MetS patients showed significantly higher Apnea Hyponea Index(AHI), but lower oxygen desaturation index(ODI 4/h) and minimum pulse oxygen saturation(SpO).
View Article and Find Full Text PDFImpact of cuproptosis in gliomas pathogenesis with targeting options.
Chem Biol Interact
January 2025
Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece. Electronic address:
Gliomas constitute the most prevalent primary central nervous system tumors, often characterized by complex metabolic profile, genomic instability, and aggressiveness, leading to frequent relapse and high mortality rates. Traditional treatments are commonly ineffective because of gliomas increased heterogeneity, invasive characteristics and resistance to chemotherapy. Among several pathways affecting cellular homeostasis, cuproptosis has recently emerged as a novel type of programmed cell death, triggered by accumulation of copper ions.
View Article and Find Full Text PDFMetabolic Dysfunction-Associated Steatotic Liver Disease and the Cardiovascular System.
Trends Cardiovasc Med
January 2025
Department of Cardiology, Euroclinic Hospital, Athens, Greece; First Department of Cardiology, Athens University School of Medicine, Athens, Greece. Electronic address:
Metabolic dysfunction-associated steatotic liver disease (MASLD), previously termed nonalcoholic fatty-liver disease, is an important and rising health issue with a link with atherosclerotic cardiovascular (CV) disease (CVD), affecting ∼25-30% of the adults in the general population; in patients with diabetes, its prevalence culminates to ∼70%; its evolutive form, nonalcoholic steatohepatitis, is estimated to be the main cause of liver transplantation in the future. MASLD is a multisystem disease that affects, besides the liver, extra-hepatic organs and regulatory pathways; it raises the risk of type 2 diabetes mellitus (T2D), CVD, and chronic kidney disease; the disease may also progress to hepatocellular carcinoma. Its diagnosis requires hepatic steatosis and at least one cardiometabolic risk factor and the exclusion of both significant alcohol consumption and other competing causes of chronic liver disease.
View Article and Find Full Text PDFChanges in the intestinal microbiota induced by the postnatal environment and their association with hypertension.
Pharmacol Res
January 2025
Laboratory of Vascular Physiology, Department of Physiology and Biophysics, Institute of Biomedical Science, University of Sao Paulo, Sao Paulo, Brazil. Electronic address:
It has been established that cross-fostering impacts the development of hypertension in spontaneously hypertensive rats (SHR). However, the ability of the cross-fostering protocol to shape gut microbiota profile in SHR and impact hypertension is not known. In this sense, the current study explored the influence of normotensive and hypertensive postnatal environments on the intestinal microbiota structure, composition, and functional capacity of SHR and Wistar rats.
View Article and Find Full Text PDFIntroduction of acetyl-phosphate bypass and increased culture temperatures enhanced growth-coupled poly-hydroxybutyrate production in the marine cyanobacterium Synechococcus sp. PCC7002.
Metab Eng
January 2025
Engineering Biology Research Center, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; Graduate School of Science, Technology, and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan; Research Center for Sustainable Resource Science, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan. Electronic address:
Polyhydroxyalkanoate (PHA) is an attractive bio-degradable plastic alternative to petrochemical plastics. Photosynthetic cyanobacteria accumulate biomass by fixing atmospheric CO, making them promising hosts for sustainable PHA production. Conventional PHA production in cyanobacteria requires prolonged cultivation under nutrient limitation to accumulate cellular PHA.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!