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Based on the characteristics of biomass fuel, this article summarizes the sources of alkali metals in biomass and the elutriation and migration.

摘要在明确了生物质燃料特点的基础上,对生物质中碱金属元素的来源和析出迁移规律进行了概述。

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Methods and recent development of isolation of structurally characterizable alkali, alkaline earth and lanthanide metal ketyl radical complexes were reviewed in the paper.

介绍了利用金属离子的配位作用分离要有中间体——自由基中间体的研究方法和最新进展。

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Using dolomite and sinter magnesia clinker as a main material and added with alkali metal phosphate binder and additives,amagnesia-calcia coating material has been developed.

采用白云石配以适量的镁砂熟料和磷酸盐结合剂及复合外加剂研制出了具有较好性能的镁钙质中间包涂料。

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This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

离子交换剂在萃取色谱中得到了广泛的用,本文详细总结了离子交换剂在分析化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等的分离与测定。

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可汗学院:生物化学

These alkali metals are very, very reactive.

这些碱金属非常非常活泼。

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可汗学院:生物化学

And hydrogen is not considered an alkali metal.

氢不被认为是碱金属。

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趣味化学实验:Periodic Videos

You have an alkali metal tie? It's a new tie I just got.

你有碱金属领带吗? 这是我刚买的一条新领带。

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可汗学院:生物化学

Group one, if you put hydrogen aside, these are referred to as the alkali metals.

第一组,如果你把氢放在一边,这些被称为碱金属。

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Crash Course 综合篇

Alkali metals want nothing more than to dump off an electron and form a positive ion, or cation.

碱金属只想释放正离或阳离

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可汗学院:生物化学

In fact, they especially love to react with the alkali metals over here.

事实上,他们特别喜欢与这里的碱金属发生反应。

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Crash Course 综合篇

The first two columns on the left are your alkali metals, and your alkaline earth metals.

左边的前两列是碱金属和碱土金属。

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经济学人-科技

It took decades to tease out the truth of Debereiner's conjecture, and thus to construct the periodic table-in which the alkali metals form the first column.

科学家们证实Debereiner猜想的正确性用了数十年的时间,也因此建立了元素周期表——碱金属组了第一族。

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VOA常速英语_亚洲

India used to import the alkali metal from Australia and Argentina, but the first discovery of lithium deposits in the country will make India self-reliant in battery manufacturing.

印度过去常常从澳大利亚和阿根廷进口碱金属,但该国首次发现锂矿藏将使印度在池制造方面实现自力更生。

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经济学人-科技

ONE of the first inklings that chemistry has an underlying pattern was the discovery, early in the 19th century, of lithium, sodium and potassium-known collectively as the alkali metals.

早在19世纪,人们对化学潜在规律已有模糊认知之时,锂、钠、钾被发现,它们同被称为碱金属。

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趣味化学实验:Periodic Videos

This one's a Dutch one. I was given it on Saturday So here you can see we have the alkali metals (And where are they? ) Here.

这个是荷兰的。我是星期六收到的所以在这里你可以看到我们有碱金属(它们在哪里?)在这里。

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Crash Course 综合篇

Next, you have the alkaline earth metals - reactive metals, but not as reactive as the alkali metals, forming cations with two positive charges instead of just one.

接下来,你有碱土金属 - 活泼金属, 但不像碱金属那样活泼,带有两个正荷而不是一个正荷的阳离

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可汗学院:生物化学

Well if you look at the period table, the people who want to give really badly-- and we've talked about this a good bit-- are the alkali metals.

好吧,如果你看一下周期表,那些非常想给予的人——我们已经谈了很多——是碱金属。

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Scishow 精选系列

You got your noble gases over here, and hydrogen, the building block of everything in the universe over here, you got your alkali metals and gold and other lovely regular metals in the middle here.

这里有稀有气体和氢,氢是宇宙万物的组部分,而中间是碱金属、金和其他可爱的规则金属。

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