| 词汇 | tannin |
| 释义 | tannin noun[ C or U ] uk /ˈtæn.ɪn/ us /ˈtæn.ɪn/(alsotannic acid, uk /ˌtæn.ɪkˈæs.ɪd/us) (one of) a group of chemicals that are found in plant cells, especially in leaves, bark (= a tree's outer covering), and fruit that is not yet ready to eat丹宁（酸），鞣酸 Biochemistry adipose adrenalin albumin aldosterone amino acid endonuclease endorphin enzymatic enzymatically enzyme messenger RNA mRNA mycoprotein non-enzymatic nuclease serotonin spike protein T level testosterone trace element You can also find related words, phrases, and synonyms in the topics: Chemicals, chemical compounds & gases Examples of tannintannin However, condensed tannins can also lower palatability, voluntary feed intake and digestibility. Secondly, the question of the physiological significance of concentrations of tannins tested in vitro is also relevant. Apart from their strong affinity for proteins, condensed tannins can form complexes with metal ions and have radical scavenging properties10. There is a wealth of evidence suggesting that condensed tannins in plants influence the voluntary feed intake, palatability and digestibility of the fodder2,4,5. Within plants, condensed tannins are concentrated in cell vacuoles12 and usually occur in higher concentrations in leaves and reproductive organs than in stems and roots14. Goats fed tannin-containing leaves do not exhibit toxic syndromes. What are their concentrations of condensed tannins and what are the most important drivers of fluctuations in tannin concentrations under field conditions? Such variability in activity has previously been reported for tanniferous plants or condensed tannins both from in vitro and in vivo studies. Furthermore, it was observed that ensiling reduced tannin concentrations of sorghum38. Determination of extractable and bound condensed tannin concentrations in forage plants, protein-concentrate meals and cereal-grains. Results are given in mg of phenolics and tannins per g dry weight for each species. In addition to the likely impact of condensed tannins on nitrogen metabolism, tannins may also affect the mineral supply of the animal35,36. Condensed tannins exist as water-soluble oligomers and as insoluble polymers10. This is a very expensive operation as different variables need to be measured (including, for example, starch, amylose, minerals, proteins, sugars, tannins). The amount of condensed tannin was relatively uniformly distributed between life-form categories than condensed-tannin-free total phenolics. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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