| 单词 | polenske number |
| 释义 | > as lemmasPolenske number attributive. Designating a number expressing the proportion of volatile water-insoluble fatty acids in a fat; esp. in Polenske number, Polenske value.The Polenske number is evaluated as the volume in millilitres of 0.1 n alkali required to neutralize the water-insoluble volatile fatty acids distilled from 5 g of fat under specified conditions. ΚΠ 1906 Analyst 31 259 When the Polenske number exceeded 2, the proof of the presence of cocoanut oil [in the butter] was fairly definite. 1928 E. R. Bolton Oils, Fats & Fatty Foods iv. 83 Although in general practice the Kirschner value is a measure of the amount of butter fat present, yet there are a few vegetable oils that give large Kirschner and Reichert-Meissl, and low Polenske values. 1973 D. Pearson Lab. Techniques Food Anal. vi. 153 The proportion of butter fat present is frequently assessed from the Reichert and Polenske values. 2001 Milchwissenschaft 56 675 No significant correlation was found between yogurt and cream butter in terms of refractive index, iodine value, and Reichert-Meissl, Polenske and saponification numbers. < as lemmas |
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