When lipid free hydrogen peroxide solutions were determined, the determined cholesterol and triglyceride concentrations decreased with dilutions of hydrogen peroxide.

当测定不含血脂的过氧化氢溶液时，胆固醇和甘油三酯的实测浓度均随着过氧化氢的稀释而降低；

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Activated carbon (AC), carbon black (CB) and carbon nanotube (CNT) was employed to catalyze methane decomposition to produce COx-free hydrogen and solid carbon in a fluidized-bed reactor.

本文在流化床中对活性炭、炭黑和碳纳米管等固体碳在甲烷裂解反应中的催化活性进行了研究。

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Until now, experiments have produced anti-atoms, namely of hydrogen, but only in a free state.

直到现在以前，实验中已经制造出了反原子，即反氢原子，但是只是在自由态下。

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One hydrogen atom pairs with other free hydrogen atoms to create hydrogen gas, which is also captured and sold.

FORBES: Magazine Article

President BUSH: We will increase our research in better batteries for hybrid and electric cars and in pollution-free cars that run on hydrogen.

NPR: Slate's Politics: State of the Union Specifics

So by building up the concentration of ammonium ions inside its retaining membrane, H. pylori is able to fend off the destructive attentions of the hydrogen ions in stomach acid and thus live free from competition by less hardy germs.

ECONOMIST: Stomach turning | The