This is the idea that a patentshould be given to a machine or something that creates a material change, like a chemical process.
VOA: special.2010.07.16
I can take an insulated box, and I can have a chemical reaction in that insulated box.
里面进行着化学反应,比如说把一个药店。
I figured Chemical Engineering would be the best way to get into it because it's a really broad major.
我发现化学工程应该是接触新能源的最好方式,因为这个专业覆盖面也很广。
The National Institutes of Health says levodopa is a chemical found naturally in plants and animals.
VOA: special.2009.04.07
To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.
当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。
The chemicals form when amino acids react with creatine, a chemical found in muscles.
VOA: special.2010.06.01
These are actually all examples that we'll talk about in freshman chemistry at some point, as an example of a connection between a chemical principle we learn, and what we can know about how it functions.
作为联系一个我们,所学的化学原理,和我们能知道它,如何工作的例子。
Cholinesterase inhibitors may work by protecting a chemical messenger needed for brain activities.
VOA: special.2009.09.15
All of them could potentially be receiving signals from a ligand or a chemical.
它们全都能接收,由配体或某种化学物质传递的信号
The cells slowly lose their ability to produce a chemical called dopamine.
VOA: special.2009.04.07
You could be a chemical engineer.
你就可能成为一个化学工程师。
The polymer was a chemical product that formed the basis for Kevlar.
VOA: special.2010.02.09
Is it a chemical?
还是化学制品呢
Glyphosate is a chemical used in Round-Up and other weed killing products.
VOA: special.2010.04.27
Generally, there are a couple of elements that one might set down as in a Petri dish, and wait to see if some chemical reaction might take place, but not at all sure of what it might be.
一般来说,都有几个元素,作者会把它们像放入培养基中一样培养,等待某种化学反应的产生,但对可能的结果却一无所知。
The inside is treated with urea, a chemical commonly used as fertilizer.
VOA: special.2010.03.15
So recently we also set up a meeting with the new director of undergraduate studies in chemical engineering and
最近我们还和化学工程本科部的新主任开了一次会,
In the study, researchers tested curcumin, a chemical compound taken from turmeric.
VOA: special.2010.06.01
This conversion from a mechanical energy into a chemical energy can be nicely visualized when one fills a hair cell with a sensitive die that responds to the calcium ions that influx into the cell.
如果在毛细胞中注入,对钙离子敏感的物质,可以精确地模拟,这一机械能到化学能的转化过程。
Here is her opinion on why people like chocolate so much: "Well,scientists tell us that we all love chocolate because there's a chemical response that takes place in our brains.
VOA: special.2010.02.17
So, in talking about covalent bonds, we should be able to still apply a more general definition of a chemical bond, which should tell us that the h 2 molecule is going to be lower in energy than if we looked at 2 separate hydrogen atom molecules.
那么,既然提到了共价键,我们应该还可以,给化学键下一个更普遍的定义,那就是告诉我们氢分子能量应该更低,与两个分开的氢的单原子分子相比。
Soap is made from a chemical reaction called saponification.
VOA: special.2011.03.09
Now, if you're an engineer, and you use the ideal gas law to design a chemical plant or a boiler or an electrical plant, you know, a steam plant, you're going to be in big trouble.
比如说锅炉,蒸汽机,我们会遇到一个大问题:,我们设计的机器将无法运作,因为对大部分实际气体。
Next,the stone is covered with a chemical mixture.
VOA: special.2009.09.02
Some proteins can be switched from an 'off' position where they don't do anything to an 'on' position where they now do something by only a chemical reaction like this where a phosphorous is added.
一些蛋白质可以从关闭状态的,无所作为,到成为开启状态后,执行某种功能,中间只发生了一个引入磷酸基的化学反应
Dopamine is a chemical that produces pleasure.
VOA: special.2010.03.09
Don't worry about how they work in the immune system, but what if you could manufacture antibodies then you could make a chemical, an antibody, that is capable of binding to a specific other chemical and you could use that for things.
别管它们在免疫系统内是怎么工作的,只要考虑能不能制造抗体,那么假设你能制造这种化学物质 抗体,抗体又能够同其他特别的化学物质结合,你就可以让抗体为我所用
She is a chemical engineer, a medical doctor,a college professor, and in 1992, was the first African-American woman astronaut to go into space.
VOA: standard.2010.03.26
This is a mechanism by which an electrical signal comes here, it gets translated into a chemical signal, the chemical diffuses across the gap and reinitiates a - an electrical signal in the next cell and that's one way that it happens.
这就是电信号产生的机理,电信号翻译成化学信号,化学物质扩散过突触间隙,重新激起下个细胞中的电信号,这是一种方式
It performs a chemical reaction on the protein, taking a phosphorous from ATP and moving that phosphorous onto the protein.
它能够催化蛋白参与如下反应,即将ATP上的一个磷酸基团,转移到蛋白质上
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