The foamy substances cover foam protein, polypeptide, isohumulone, melanoid, metal ions, amylase, alcohol and barm etc.
使啤酒形成泡沫的物质有泡沫蛋白和多肽、异葎草酮、类黑素、金属离子、多糖、酒精、二氧化碳及酵母等。
Metal ions
英语例句库
As shown by study the extracting powers of two extraction agents are changed with acidy of developer extracting power N,N-diphenyl glycine is stronger than N-n-butyl glycine for 5 metal ions.
N，N—二苯基甘氨酸对5种金属离子的萃取能力强于N—正丁基甘氨酸。
The results of research show that the impurity of infusibility and metal ion has been removed after the leaching of calcium carbide residue, and the transform rate of hydrated lime up to about 88%.
研究表明,电石渣经浸取后不溶性杂质与金属离子杂质都被除去,氢氧化钙转化率为88%左右。
原声例句
科学60秒 2017年4月合集
Leigh and his team did something similar, but used metal ions as the fingers to keep the knot tying organized.
利和他的团队做了类似的事情，不过他们用金属离子代替“手指”来打结。
科学60秒 2017年4月合集
And then mum pulls her finger out-we extract the metal ions out-and you're left with just the knot at the end.
“然后妈妈抽出手指，而我们提取出金属离子，最后只剩下打得结。”
化学 Crash Course
Electrolysis is used for lots of other things too, like coating jewelry or flatware with gold or silver, refining metals or separating mixtures of metal ions.
电解也用于许多其他用途，例如在珠宝或餐具上涂上金或银、精炼金属或分离金属离子混合物。
Crash Course 综合篇
Meanwhile, the opposite happens at the cathode rod, where metal ions from the solution gain electrons and precipitate on to the cathode as pure metal, gradually growing larger.
与此同时，相反的情况发生在阴极棒上，溶液中的金属离子获得电子并以纯金属的形式沉淀到阴极上，逐渐变大。
化学 Crash Course
The circuit is completed by the wire, but also by a salt bridge, which is also a U-shaped tube that contains a salt solution that allows the metal ions to go from the anode to the cathode.
电路由电线完成， 但也由盐桥完成，盐桥也是一个 U 形管， 内含盐溶液，可让金属离子从阳极流向阴极。
英语百科
Metal
A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. Metals are generally malleable — that is, they can be hammered or pressed permanently out of shape without breaking or cracking — as well as fusible (able to be fused or melted) and ductile (able to be drawn out into a thin wire). About 91 of the 118 elements in the periodic table are metals, the others are nonmetals or metalloids. Some elements appear in both metallic and non-metallic forms.