And it'll also make your cells fizz, because your cells also have catalase in them.

它也会让你的胞产生嘶嘶声，因为你的胞中也含有过化氢酶。

And it'll also make your cells fizz, because your cells also have catalase in them. Why?

还会让你的胞嘶嘶作响，因为其中也含有过化氢酶。为什么？

But, when peroxide comes at your cells from the outside, the catalase can't protect them.

但，当过化从体外进入到你的胞内部时，过化氢酶并无法起到保护作用。

Staph saprophyticus is catalase positive, so it makes an enzyme called catalase.

腐生葡萄球菌过化氢酶阳性的，它能产生一种称为过化氢酶的酶。

That's mostly the peroxide reacting with an enzyme inside the bacteria, called catalase, forming water and oxygen gas.

过化菌内部称作过化氢酶的一种酶正在进行反应，形成水和气。

To test for this, a few drops of hydrogen peroxide are added to the colony of the suspected bacteria.

将几滴过化氢添加到待测菌的菌落中，可以对过化氢酶进行测试。

Anaerobes, clostridia included, tend to lack the enzymes catalase or superoxide dismutase, so oxygen is actually toxic to them.

厌菌（包括梭菌）一般都缺乏过化氢酶或超化歧化酶；因此气对他们有毒害。

So, if catalase is present, like in staph saprophyticus, it makes hydrogen peroxide dissociate into water and oxygen, making the mixture foam.

如果存在过化氢酶（如腐生葡萄球菌），它会使过化氢分解成水和气，使混合出现泡沫。

We can use this to differentiate Staph saprophyticus from other gram positive cocci, like streptococci and enterococci, which are catalase negative.

我们可以利用这一特性来区分腐生葡萄球菌和其他革兰氏阳性球菌，如链球菌和肠球菌这一类过化氢酶阴性的菌。

So your cells are stocked with catalase to help turn that hydrogen peroxide into water and oxygen before it can do any harm.

所以你的胞中存有过化氢酶，以帮助这些过化氢转换成水和气，以免产生任何危害。

And it’ll also make your cells fizz, because your cells also have catalase in them.

而且它还会让你的胞起泡，因为你的胞中也含有过化氢酶。

But, when peroxide comes at your cells from the outside, the catalase can’t protect them.

但当过化氢从外部接触到胞时，过化氢酶就无法保护它们了。

That’s mostly the peroxide reacting with an enzyme inside the bacteria, called catalase, forming water and oxygen gas.

那过化氢菌内的一种酶——过化氢酶——反应，生成水和气。

It affects a protein called NRF2, which moves into the DNA, binds to the DNA, and then the DNA spits out the instructions for catalase, superoxide dismutase, and glutathione.

它影响了一种名为NRF2的蛋白质，这种蛋白质会进入DNA，DNA结合，然后DNA就会释放出过化氢酶、超化歧化酶和谷胱甘肽的生成指令。

It's a non-spore forming, aerobic, facultative intracellular, catalase and oxidase positive bacteria that is best visualized with silver stain and grows well on BCYE agar with cysteine and iron into grey-white colonies with a cut-glass appearance.

它非芽孢、需、兼性胞内寄生、化酶和过化氢酶阳性的菌；最佳观察方式银染色；在BCYE培养基供给半胱氨酸和铁的情况下生长良好，可形成雕花玻璃样的灰白色菌落。

They could also identify distinct peroxisomes, small organelles involved in a metabolism, by staining for a protein called catalase, and it could map the precise subcellular localization of key functional proteins.

他们还能通过标记一种名为过化氢酶的蛋白质，识别出不同的过化酶体，这些小型胞器参代谢过程，并能绘制出关键功能蛋白在亚胞水平的精确定位图。

The cells in our hair bulb produce a little bit of hydrogen peroxide, which is a metabolic byproduct, and typically there's an enzyme called catalase that breaks this down to water and oxygen.

我们头发毛球中的胞会产生一点过化氢，这一种代谢副产品， 通常有一种叫做过化氢酶的酶会将其分解为水和气。

Legionella pneumophila is non-spore forming, aerobic, which means it needs oxygen to survive, facultative intracellular, which means it can survive both inside and outside the cell, and oxidase and catalase positive, which means it produces both of these enzymes.

嗜肺军团菌一种非芽孢好菌，需气才能存活，也兼性胞内寄生菌，即它在胞内外均可生存，化酶和过化氢酶阳性，即它可以产生这两种酶。

But as we age, there's declining levels of catalase, and this allows the build-up of hydrogen peroxide in the hair bulb, which damages and destroys the melanocytes, or the pigment producing cells, of our hair.

但随着年龄的增长，过化氢酶的水平会下降，这使得氢过化在毛囊中积累，从而损害并破坏产生色素的黑素胞。

Alright, as a quick recap: Staphylococcus saprophyticus is round, gram-positive, facultative anaerobic, non-motile, non-spore forming, catalase positive, coagulase negative, urease positive, and novobiocin resistant bacterium, which is known to be part of the normal flora of the perineum.

得！来快速回顾一下：腐生葡萄球菌一种圆形的、革兰染色阳性的、兼性厌菌，无运动能力、不形成孢子，且过化氢酶阳性、凝固酶阴性、脲酶阳性，对新生霉素耐药，它已知的会阴正常菌群的一部分。