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Nikola Tesla vs. Thomas Edison: Who Was the Better Inventor?
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Nikola Tesla vs. Thomas Edison: Who Was the Better Inventor?# EE - 电子工程
t*i
1
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T*k
2
无尽武装更了
avatar
g*a
3
想给老爸买
所以不能用2年的合同
有什么办法么?
如果我买了一个月就cancel合同
大概要罚款多少?
avatar
s*n
4
最近做的一个六肽意外的自组装成 纤维了。初步作了 SEM。(说意外是因为我们不做
自组装,而且这个肽上有四个大的芳香环,位阻很大,不利于自组装)
现在我们想知道这个东西到底怎么自组装的,试了 CD, 没有观察到任何 白塔(B,
这个字母打不出来) sheet的信号。
我怀疑可能因为我不懂CD, 所以做的不对了。我在 二氯甲烷,甲醇里面 各种浓度都
试了试,都不行。我看文献里面有做几十个 mM 浓度的,可是为什么那个搞CD的小白告
诉我这么高浓度的时候看不到任何有用的信号。要我做很低的浓度,我自己也偷偷的试
了试高浓度,的确是不行。
请问各位大哥大姐,这个自组装如果不是组装成白塔(B, 这个字母打不出来) sheet
, 还有什么机理?
我做合成的,以前没接触过自组装的东西,希望大家给我点一下机理可能都有哪些?
先拜谢了
avatar
z*7
5
Tesla on Edison: "If he had a needle to find in a haystack he would not stop
to reason where it was most likely to be, but would proceed at once, with
the feverish diligence of a bee, to examine straw after straw until he found
the object of his search. ... I was almost a sorry witness of such doings,
knowing that a little theory and calculation would have saved him ninety per
cent of his labor."
—New York Times, October 19, 1931 (the day after Edison died)
Nikola Tesla would have celebrated his 158th birthday today (July 10).
The Serbian-American scientist was a brilliant and eccentric genius whose
inventions enabled modern-day power and mass communication systems.
His nemesis and former boss, Thomas Edison, was the iconic American inventor
of the light bulb, the phonograph and the moving picture. The two feuding
geniuses waged a "War of Currents" in the 1880s over whose electrical system
would power the world — Tesla's alternating-current (AC) system or Edison'
s rival direct-current (DC) electric power.
Advertisement
00:1001:51
Amongst science nerds, few debates get more heated than the ones that
compare Nikola Tesla and Thomas Edison. So, who was the better inventor?
"They're different inventors, but you can't really say one is greater,
because American society needs some Edisons and it needs some Teslas" said W
. Bernard Carlson, the author of "Tesla: Inventor of the Electrical Age" (
Princeton Press, 2013).
From their starkly different personalities to their lasting legacies, here's
how the two dueling inventors stack up. [Vote: Tesla vs. Edison - Who Was
the Greatest Inventor of All Time?]
Most brilliant
Tesla had an eidetic memory, which meant he could very precisely recall
images and objects. This enabled him to accurately visualize intricate 3D
objects, and as a result, he could build working prototypes using few
preliminary drawings.
"He really worked out his inventions in his imagination," Carlson told Live
Science.
In contrast, Edison was more of a sketcher and a tinkerer.
"If you were going to [the] laboratory and watch him at work, you'd find he'
d have stuff all over the bench: wires and coils and various parts of
inventions," Carlson said.
In the end, however, Edison held 1,093 patents, according to the Thomas
Edison National Historic Park. Tesla garnered less than 300 worldwide,
according to a study published in 2006 at the Sixth International Symposium
of Nikola Tesla. (Of course, Edison had scores more assistants helping him
devise inventions, and also bought some of his patents.)
Most forward thinking
Though the light bulb, the phonograph and moving pictures are touted as
Edison's most important inventions, other people were already working on
similar technologies, said Leonard DeGraaf, an archivist at Thomas Edison
National Historical Park in New Jersey, and the author of "Edison and the
Rise of Innovation" (Signature Press, 2013).
"If Edison hadn't invented those things, other people would have," DeGraaf
told Live Science.
In a shortsighted move, Edison dismissed Tesla's "impractical" idea of an
alternating-current (AC) system of electric power transmission, instead
promoting his simpler, but less efficient, direct-current (DC) system.
By contrast, Tesla's ideas were often more disruptive technologies that didn
't have a built-in market demand. And his alternating-current motor and
hydroelectric plant at Niagara Falls— a first-of-its-kind power plant —
truly electrified the world.
Tesla also spent years working on a system designed to wirelessly transmit
voices, images and moving pictures — making him a futurist, and the true
father of radio, telephone, cell phones and television. [Creative Genius:
The World's Greatest Minds]
"Our entire mass communication system is based on Tesla's system," said Marc
Seifer, author of "Wizard: The Life and Times of Nikola Tesla," (Citadel
Press, 2001).
Unfortunately, Tesla's grand scheme failed when his financial backer, J.P.
Morgan, became fed up with years of failure.
Biggest impact
Edison's enduring legacy isn't a specific patent or technology, but his
invention factories, which divided the innovation process into small tasks
that were carried out by legions of workers, DeGraaf said. For instance,
Edison got the idea for a moving picture camera, or kinetoscope from a talk
by photographer Edward Muybridge, but then left most of the experimentation
and prototyping to his assistant William Dickson and others. By having
multiple patents and inventions developing in parallel, Edison, in turn,
ensured that his assistants had a stable financial situation to continue
running experiments and fleshing out more designs.
"He invents modern innovation as we know it," DeGraaf said.
Tesla's inventions are the backbone of modern power and communication
systems, but he faded into obscurity later in the 20th century, when most of
his inventions were lost to history. And despite his many patents and
innovations, Tesla was destitute when he died in 1943.
Best dinner party guest
At the height of his career, Tesla was charismatic, urbane and witty. He
spoke several languages and counted writers Mark Twain and Rudyard Kipling,
and naturalist John Muir as friends, according to Seifer.
"He moved in very high circles," Seifer said.
But Tesla could also be haughty and was known to be a hygiene freak. In his
later years, his obsessive tics (such as his fear of women's earrings) grew
stronger, and he died penniless and alone in a hotel in New York City,
Seifer said.
Edison, meanwhile, was hard of hearing and introverted, with few close
friends.
Edison also had a mean streak, which he amply displayed in his vicious
attacks against Tesla during the War of Currents. He also gave advice on how
to build the first electric chair using direct current (DC), going into
gory detail about the techniques needed to do the deed, Seifer said.
Most fashionable
Tesla was tall, slender and imposing, with a dashing moustache and an
impeccable sense of style, Carlson said. His top hat and tails are even on
display in a museum in Serbia.
By contrast, Edison was known to be a bit of a slob.
"We're not really interested in seeing what Edison wore, because it was
pretty forgettable," Carlson said.
Edison even wore shoes two sizes too large so that he could slip into and
out of them without stooping down to untie them, Carlson said.
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b*a
6
这都是啥啊

【在 T*******k 的大作中提到】
: 无尽武装更了
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m*s
7
香港有卖的
价钱比美国还便宜一点点
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M*d
8
自组装不一定要成b sheet呀,要成b sheet的话六个肽有点太短了
CD看不出来就用NMR看,NMR看不出来就用MS看
因为氢键自组装的话,就在低极性溶剂里面做
hydrophobic interaction导致自组装的话,就在极性溶剂里面做
CD 几十个mM必然是不行的了,透过率太低了仪器误差超高

sheet

【在 s*****n 的大作中提到】
: 最近做的一个六肽意外的自组装成 纤维了。初步作了 SEM。(说意外是因为我们不做
: 自组装,而且这个肽上有四个大的芳香环,位阻很大,不利于自组装)
: 现在我们想知道这个东西到底怎么自组装的,试了 CD, 没有观察到任何 白塔(B,
: 这个字母打不出来) sheet的信号。
: 我怀疑可能因为我不懂CD, 所以做的不对了。我在 二氯甲烷,甲醇里面 各种浓度都
: 试了试,都不行。我看文献里面有做几十个 mM 浓度的,可是为什么那个搞CD的小白告
: 诉我这么高浓度的时候看不到任何有用的信号。要我做很低的浓度,我自己也偷偷的试
: 了试高浓度,的确是不行。
: 请问各位大哥大姐,这个自组装如果不是组装成白塔(B, 这个字母打不出来) sheet
: , 还有什么机理?

avatar
x*8
9
小白问题,拿回去国内可以用作手机吗?不是3G还不行的吗?
avatar
s*n
10
Thanks
How MS works on self-assembly?

【在 M****d 的大作中提到】
: 自组装不一定要成b sheet呀,要成b sheet的话六个肽有点太短了
: CD看不出来就用NMR看,NMR看不出来就用MS看
: 因为氢键自组装的话,就在低极性溶剂里面做
: hydrophobic interaction导致自组装的话,就在极性溶剂里面做
: CD 几十个mM必然是不行的了,透过率太低了仪器误差超高
:
: sheet

avatar
c*g
11
2楼正解,去香港买是最好的方法。
avatar
K*N
12
可以试试IR
如果结构很稳定,可以加银离子,测ESI,即使可以,但没有结构信息
avatar
c*r
13
为啥不能缩短光程?

【在 M****d 的大作中提到】
: 自组装不一定要成b sheet呀,要成b sheet的话六个肽有点太短了
: CD看不出来就用NMR看,NMR看不出来就用MS看
: 因为氢键自组装的话,就在低极性溶剂里面做
: hydrophobic interaction导致自组装的话,就在极性溶剂里面做
: CD 几十个mM必然是不行的了,透过率太低了仪器误差超高
:
: sheet

avatar
g*r
14
自组装有几个level的,要看你的组装到了什么level. 初级level, 只有几个分子胡乱
粘在一起,你可能什么都看不到。到了later level, 二级和三级结构都出来了,你大
概就能看见beta sheet的形状了。不过六肽自组装的几率比较小啊。
另外,你这个小分子要用100-200 uM 的浓度。要看自组装的产物,是不是要先配高浓
度的,确信有自组装产物了再稀释。

sheet

【在 s*****n 的大作中提到】
: 最近做的一个六肽意外的自组装成 纤维了。初步作了 SEM。(说意外是因为我们不做
: 自组装,而且这个肽上有四个大的芳香环,位阻很大,不利于自组装)
: 现在我们想知道这个东西到底怎么自组装的,试了 CD, 没有观察到任何 白塔(B,
: 这个字母打不出来) sheet的信号。
: 我怀疑可能因为我不懂CD, 所以做的不对了。我在 二氯甲烷,甲醇里面 各种浓度都
: 试了试,都不行。我看文献里面有做几十个 mM 浓度的,可是为什么那个搞CD的小白告
: 诉我这么高浓度的时候看不到任何有用的信号。要我做很低的浓度,我自己也偷偷的试
: 了试高浓度,的确是不行。
: 请问各位大哥大姐,这个自组装如果不是组装成白塔(B, 这个字母打不出来) sheet
: , 还有什么机理?

avatar
o*o
15
恭喜你要发文章了
avatar
d*n
16
配D2O溶液,测FTIR, beta sheet 在有特征吸收峰(e.g. 1610~1635),
短的多肽,就判断2nd 结构而言, CD 有可能不如FTIR 有效。
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