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Pu-erh tea, SEM

Pu-erh tea, SEM

C028/2824

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Credit

SCIMAT / SCIENCE PHOTO LIBRARY SCIMAT / SCIENCE PHOTO LIBRARY

Caption

Dark Pu-erh (also spelled Pu'er) tea is produced in China using Aspergillus foetidus var. Unlike Aspergillus niger, which it resembles, A. acidus does not contain mycotoxins ochratoxin A and fumonisins B2 and B4. The production is a lengthy process: e.g. a ripened Pu'er produced in early 2004 was pressed in the winter of 2004/2005, and appeared on the market between late 2005 and early 2006. The tea has in vitro antimicrobial properties against many microorganisms. Enhanced SEM shows a stoma in a darkened tea leaf as well as fungal hyphae in the form of a web on the top of the tea leaf. Image width: 71.1 micrometers. Magnification 1405x if the image is printed 10 cm wide.

Release details

Model release not required. Property release not required.

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