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为什么湿哒哒的狗很臭 – 译学馆
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为什么湿哒哒的狗很臭

Why Do Wet Dogs Stink? + Other Canine Chemistry

好的 一起来看真相
Okay folks, just going to keep it real on this one,
我们现在要去看狗狗的全天影像
we wanted an excuse to look at dog videos
这是得到的结果
all day and this is the result.
现在看一些K9chem视频
It’s time for some K9 chem.
开始播放
(Reactions Splash)
正如你们中的一些人已经知道的
As some of you out there have already learned,
狗有着灵敏的嗅觉和
dogs have an outstanding sense of smell and
嗅觉器官 能绕着我们一圈圈的跑
an olfactory system that runs laps around ours.
有超过2亿2千万嗅觉感受器
With over 220 million olfactory receptors
借着鼻子 狗不仅仅
On their noses, dogs can do more than
能闻邻居狗的屁股
just sniff their neighbor’s butt.
事实上 狗鼻子很厉害
In fact, a dog’s nose is so strong that
狗鼻子能探测人体疾病
it can detect diseases in people.
一个临床试验发现狗通过人的尿液可以
One clinical trial had dogs sniffing out prostate
嗅出前列腺癌 准确率高达98%
cancer in the urine of patients with 98% accuracy.
不仅如此 一些服务犬
That’s not all, some service dogs are
还被训练来嗅出爆炸物 毒品
trained to sniff out explosives, drugs,
还有各种昆虫
and even different species of insects.
搜寻炸弹的时候 你会很累
Now finding a bomb ought to make you
同样 狗狗为了搜寻炸弹
sweat dogs on the other hand start sweating
也会很累
in order to find the bomb.
狗狗热的时候 不会像人一样出汗
When dogs get hot, they don’t sweat like humans.
相反 狗狗的汗腺
Instead, they have glands on the bottoms
在爪子下面和鼻子上
of their paws and their noses that keep
它们保持狗狗体温平衡
their body temperatures regulated.
但是狗狗鼻子上的粘液也帮
But the mucus on a dog’s nose also helps
狗狗筛选 处理气味
them sift through and process smells.
狗狗闻到气味后
When a dog smells something, molecules
气体分子会进入到狗狗的嗅觉系统中
enter into their olfactory system and bind to
与受体细胞结合 受体细胞会给大脑发送类似
receptor cells that send a signal to the brain like,
“这是粪便””或“这就是要找的东西”
“hey this is poop” or “hey it’s that thing
“我该得到奖励了”
I’m supposed to smell to get a treat!
鼻子里的粘液根据特定分子类型减慢或加速
Nose mucus slows down or speeds up specific types
这样有助于狗狗的嗅觉系统
of molecules, helping a dog’s olfactory system
更有效地鉴别 处理气味
process and identify smells more efficiently.
既然谈到气味 那我们就来说说
Speaking of smells, why is it that dogs reek
为什么狗狗洗澡后身上会散发恶臭
immediately after they’ve had a bath?
这时的臭味是寄生在狗狗毛皮上的微生物散发出的
That wet dog smell is from the microorganisms
比如酵母菌 还有细菌
that live in dog fur like yeasts and bacteria.
这些生物会分泌出臭的 易挥发的化合物
These organisms excrete stinky, volatile compounds.
如果说你的宠物一直在产生这些化合物
So if these compounds are always being produced
那为什么洗澡后才会出现呢?
on your pet, why does a bath make them stand out?
狗狗身上湿了后
When your dog gets wet, the water displaces and
它身上的水会释放出
liberates these organic volatile molecules from
它皮毛上的有机易挥发分子
the surface of the dogs fur, allowing them
而这些分子又恰好进入到你的鼻子里
to find their way right into your nose.
另一个经常令宠物主人不舒服的气味是狗食的味道
Another smell that often offends dog owners is kibble.
狗食是由多种动物脂肪
Kibble is made up of a cocktail of animal fats,
维生素 还有和大豆或谷物混在一起的矿物质
vitamins, and minerals bulked together
所制成的
by a soy or wheat grain.
现在的狗狗并不喜欢谷物
Now, dogs aren’t big time grain lovers,
所以需要药剂师们找出
so chemists were called in to figure out
吸引狗狗吃饭的方法
how to attract them to the food.
结果发现 让狗狗吃东西最好的方式是
Turns out the best way to make dogs eat something
让食物很难闻
is make that something smell disgusting.
下面我们来举个例子看一下狗狗有趣的嗅觉和味觉
To give you an example of their interesting taste
狗狗喜欢腐胺和尸胺的气味
and smell, dogs are attracted to aromas like
也就是法医
putrescine and cadaverine; molecules that forensic
说的死人的气味
scientists know as “the dead body smell.”
你可以看出我们的味觉有些不同
So you can see we’ve got a little bit of a difference in taste.
对药剂师来说
So the challenge for chemists is finding
在有吸引力的食物和讨厌的气味之中找到平衡
the right balance between attractive
是一个挑战
eats and offensive odors.
狗狗的主人要呆在实验室外面
You dog owners are being thought
的某处
of in a lab out there somewhere.
这样狗狗就安心了
How comforting.
最后 给狗狗主人们提个醒 捡起狗狗的排泄物
Finally, folks, a reminder: pick up your dog’s poop.
不然排泄物进入到我们用的水里就会传染疾病
Here’s why: dogs add to zoonotic transfer
这是经过科学家认证的
in public water– that’s how a scientists says that
动物可以通过人们用的水给人传染疾病
animals can get people sick with the water we use.
最近一项研究发现 有一种方法能够追踪狗狗的排泄物
A study recently found a way to track dog poop
在水源中的运动轨迹 最后发现
in the water supply, and found exactly what
它要找的恰恰是水源中狗狗排泄物的残渣
they were looking for, dog poop residue in the water supply.
这有些麻烦 因为狗狗身上携带很多
This is trouble because dogs can carry
不同的寄生虫 其中还包括大肠杆菌
many different parasites including e-coli
而大肠杆菌能污染水源
which can contaminate water sources.
因此对于捡起狗狗排泄物这个问题 人们要严肃对待
So seriously people, pick up your dog crap!
如果大家喜欢看狗狗视频 请加入我们的社团
If you love watching dog videos, join the club.
这样你们就可以看到”为什么狗狗要互相闻对方的屁股”
And Hey! You can watch this one about
这个视频了
why Dogs smell each other’s butts.
不是爱狗之人吗?我为你感到遗憾
Not a dog person? Shame on you.
不过这也没关系 你可以看这些视频
But, It’s okay though, you can watch this
它们讲述了猫咪行为的化学原理
other video about the chemistry of cats.
要是有关于宠物的问题呢?
Got a pet question?
我们很愿意为你解答
We will more than likely have an answer
所以请在评论中提出
for you so post it down in the comments.
订阅该视频
Subscribe on the way out, and
我们很快会再见的
we’ll see you again soon.

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视频概述

狗狗身上沾水后很臭的化学原理

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视频来源

https://www.youtube.com/watch?v=X9AozZLZnCU

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