n.丁烯

Its main components include propane, butane and butylene. 主要成份是丙烷、丁烷、丁烯等。

Its main components include propane, butane and butylene . 主要成份是丙烷、丁烷、丁烯等。

By means of a micro-twin-screw blender,the blending of lignin with poly(butylene terephathalate)(PBT) was studied. 利用微型雙螺桿共混儀研究了木質(zhì)素與聚對苯二甲酸丁二酯的共混過程。

There is a point of optimum temperature in the curve, at which the yields of propylene and butylene are the largest. 丙烯及丁烯的收率隨著反應溫度的升高呈現(xiàn)先增加后降低的趨勢,分別存在一個最佳溫度點,且丙烯收率的最佳溫度高于丁烯的。

Decreasing sunlight or reducing the precursors of 3 methyl 2 butylene 1 thiol (MBT) was the useful method to avoid lightstruck. 減少光照或減少其前驅(qū)物質(zhì)的產(chǎn)生是降低啤酒日光嗅味的有效途徑。