In 1961, IUPAC announced that the standard atomic mass is changing from oxygen=16. to carbon-12=12.
1. For physicists, carbon-12 has been used as one of the standards in mass spectroscopy.
2. For chemists, if change the standard from the average mass of oxygen to oxygen-16, the atomic mass has to change 275ppm. However, using carbon-12 as 12., it only has to change 42 ppm.
3. There are many organic compound in the nature, such as hydrocarbon compounds and protein.
4. Carbon-12 is abundant and stable.
5. The atomic mass of hydrogen, the lightest atom, is still large than 1.
1. 碳12為質譜儀測量時的其中一個標準
2. 若以O-16為16，則化學家的平均原子量必須改變275ppm；而以C-12為12，則只要改變42ppm
3. 許多有機化合物中含有碳而沒有氧
4. 含量多且穩定：同位素:含量 = C-12：98.93% = O-16：99.76%；同位素:半生期 = C-14：5700年 = O-15 : 122秒
5. 質量最小的氫仍大於1
ref:
http://www.sizes.com/units/atomic_mass_unit.htm
https://www.scienceforums.net/forum/showthread.php?p=395022
http://www.iupac.org/publications/ci/2004/2601/1_holden.html
http://zhidao.baidu.com/question/22147666.html?si=6
http://chntlb.chshs.tpc.edu.tw/science/content/1984/00030171/0008.htm
http://presolar.wustl.edu/ref/IsotopeAbundanceTable.pdf
http://en.wikipedia.org/wiki/Oxygen-16
http://en.wikipedia.org/wiki/Isotopes_of_carbon
2008年9月14日 星期日
2008年1月13日 星期日
low EQ
National Cheng Kung University
Department of Political Science
Today, the Professor from NCKU took some invited scholars came to visit ewkee.
I was, at the beginning, very honor to introduce the tea manufacturing process for them.
As usual, we ask them which language should we use.
They chose English, since I cannot speak any Japanese.
Actually, I found that they have no idea what i was talking about, except one madam.
All I can do is showing them more things and the character of Japanese rather than I keep speaking.
Allow me to say that, the Taiwanese is so rude and look down upon me.
Not to mention that they don't understand English, they were totally out of control.
They were so discourteous.
Even when I invited them to enjoy the tea, no one paid attention to me.
The feeling is awful and unpleasant.
The story is not over yet.
Finally, after they sat down and started to drink the tea.
I asked them what kind of tea they want to test.
The Taiwanese women is so impatient, probably its because of me.
She said that they don't have much time and told me to hurry up.
I said that the Aged Tea should be drank last because it's very strong.
She said that why not I take some tea arbitrarily.
She even didn't translate my word to them.
She came here without any idea.
We are not the place only hold the introduction for the tourist.
We have culture and we want to promote the tea culture of Taiwan to foreigners.
At that time, I think I had enough.
We don't have the same frequency.
Why force us together.
Department of Political Science
Today, the Professor from NCKU took some invited scholars came to visit ewkee.
I was, at the beginning, very honor to introduce the tea manufacturing process for them.
As usual, we ask them which language should we use.
They chose English, since I cannot speak any Japanese.
Actually, I found that they have no idea what i was talking about, except one madam.
All I can do is showing them more things and the character of Japanese rather than I keep speaking.
Allow me to say that, the Taiwanese is so rude and look down upon me.
Not to mention that they don't understand English, they were totally out of control.
They were so discourteous.
Even when I invited them to enjoy the tea, no one paid attention to me.
The feeling is awful and unpleasant.
The story is not over yet.
Finally, after they sat down and started to drink the tea.
I asked them what kind of tea they want to test.
The Taiwanese women is so impatient, probably its because of me.
She said that they don't have much time and told me to hurry up.
I said that the Aged Tea should be drank last because it's very strong.
She said that why not I take some tea arbitrarily.
She even didn't translate my word to them.
She came here without any idea.
We are not the place only hold the introduction for the tourist.
We have culture and we want to promote the tea culture of Taiwan to foreigners.
At that time, I think I had enough.
We don't have the same frequency.
Why force us together.
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