| 词汇 | kaolin |
| 释义 | kaolin noun[ U ] uk /ˈkeɪə.lɪn/ us /ˈkeɪə.lɪn/ a white clay used in making porcelain and some medicines高岭土，瓷土 Ceramics & pottery amphora biscuit ware bisque bisqueware bone china chinoiserie crazed crazing earthen earthenware fire glaze porcelain potter potter's wheel pottery refire terracotta throw ware Examples of kaolinkaolin The featureless readings were interpreted as an indication of the presence of kaolin. Each dish was then sprayed, using a hand-held mister, with either water or the kaolin particle suspension. An additional experiment examined the effects of the kaolin particle film on the settling of second-instar nymphs over a shorter timeframe. The needle-like stylets may be able to penetrate between the particles, so that any disruption by the kaolin particle film is minimal or negligible. We conducted a series of laboratory experiments to investigate the mode of action of kaolin against aphids. There have been very few laboratory studies to investigate the mechanisms of action of kaolin against sap-feeding insects. The clay mineralogy of this soil is dominated by kaolin (65+80%) with sub-dominant illite (10+20%) and vermiculite (1+5%). The corporation expected eventually to extract 400 tons of kaolin per day, which would require 200 tons of firewood per day. The biggest impact came with the amount of firewood needed to dry the kaolin, one half ton of firewood for every ton of kaolin. Our small-scale leaf disc bioassay revealed that aphids show a clear avoidance of kaolin-treated leaf areas very rapidly, certainly within the first 20 min of plant contact. Dolomite crystals occur suspended within kaolin, but also encapsulate kaolinite crystals, indicating coeval precipitation. This compared to 20 of the 26 on the kaolin (upper surface only) treated plants and 14 of the 23 on the kaolin (both surfaces) treated plants. Rejection of kaolin-treated plant material occurred very rapidly (within 20 min) and this behavioural effect may be related to the efficacy of kaolin in controlling aphids under field conditions. Using a hand-held sprayer, two applications of the kaolin particle suspension were applied to the point of run-off to the plant material or other substrates used experimentally. The quality of the image of kaolin figurines varied, so that there is no direct correlation between paste and overall modeling or quality of the image. 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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