The nanotubes generate80 milliliters of hydrogen per hour per watt of ultraviolet light, a record for a photocatalyst-only system.

利用这种奈米管，每小时每瓦特紫外线可产生80毫升氢气，是纯光触媒系统中的最高纪录。

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The research team modeled a facility capable of producing the hydrogen equivalent of 1 GW of continuous output, or 610 tons of hydrogen per day.

该研究团队模拟出了一个能连续平均产出氢气1gw或者每天产出氢气610吨的设备。

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There are just two hydrogen atoms per cubic centimeter on average in space, which poses no threat to spaceships traveling at low speeds.

太空中平均每立方厘米只有两个氢原子，这对低速飞行的宇宙飞船不构成威胁。

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So if I tell you that the energy for single hydrogen atom is negative 13 12 kilojoules per mole.

如果我告诉大家单个氢原子的能量,是负的，1312，千焦每摩尔。

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So, what we get for the disassociation energy for a hydrogen atom is 424 kilojoules per mole.

因此，我们就得到了氢原子,离解能的大小为，424，千焦每摩尔。

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In contrast, the dissociation energy of a bond for hydrogen, and molecular hydrogen is everywhere around us, we see 432 kilojoules per mole.

相反，氢分子在我们周围到处都是，一个氢分子的离解能，是432千焦每摩尔。

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Natural gas contains only one carbon and four hydrogen atoms per molecule, making it the cleanest of fossil fuels.

FORBES: Magazine Article

And sure enough, Mathur found that among the nearly 800 participants she tested, those with higher levels of methane (three or more parts per million over 90 minutes) and hydrogen gases (20 or more parts per million) in their breath also tended to be heavier, with a BMI about 2.4 points greater than those with normal levels of the gases and about 6% more body fat on average.

CNN: Can you smell obesity?

Warren Zapol, of the Massachusetts General Hospital and a professor of anaesthesia at Harvard Medical School, along with his colleagues, monitored the vital signs of mice exposed to low-dosages (80 parts per million) of hydrogen sulphide for several hours.

ECONOMIST: Researchers find hydrogen sulphide can lower metabolism