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全部话题 - 话题: nitrogen
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p********e
发帖数: 6030
1
来自主题: Automobile版 - what is nitrogen tire
it's tire pumped with nitrogen instead of air. It IS normal.
u****q
发帖数: 24345
2
来自主题: Automobile版 - what is nitrogen tire
The tire is light coz it is made of air -- nitrogen.
e***z
发帖数: 7126
3
来自主题: Automobile版 - what is nitrogen tire
对。我老的dealer 说给我老冲的是oxygen entriched nitrogen
j******y
发帖数: 185
4
来自主题: Automobile版 - 去哪里fill nitrogen
刚买的车的轮胎冲的是nitrogen,我在想万一以后车胎需要打气什么的,我还要开回
dealer那里充气?能自己找个加油站直接冲air吗?
y*******d
发帖数: 1674
5
来自主题: Automobile版 - Door edge guard和Nitrogen有必要么
买odyssey 本来只要splash guard,只要100多
结果dealer说除了splash给每个车都加了nitrogen和door edge guard,一下子就到了
499
这有必要么
d********4
发帖数: 860
6
来自主题: Automobile版 - Nitrogen的车胎有什么好处吗?
刚买了新车,dealer说可以免费车胎加nitrogen。请问这个好处是什么?以后如果车胎
需要加气,可以加空气吗?氮气和空气混合没有事情吧?
k**o
发帖数: 15334
7
来自主题: Automobile版 - Nitrogen的车胎有什么好处吗?
没有什么用,最烦的是去换油,以前免费检查胎压,胎压低了会给免费
打气。现在去了之后,人家一看是绿色的气门帽,就拒绝打气,说你这
是nitrogen的,打不了。其实根本不是,我自己打的空气进去。结果
还是得回家拿我自己的空压机补充胎压。
h**********r
发帖数: 671
8
Global Proteomics Reveal an Atypical Strategy for Carbon/Nitrogen
Assimilation by a Cyanobacterium Under Diverse Environmental Perturbations
Mol Cell Proteomics 2010 9: 2678-2689. First Published on September 21, 2010
, doi:10.1074/mcp.M110.000109
Abstract Full Text Full Text (PDF) Supplemental Data
You may send it to m******[email protected]
Thanks and have a nice weekend!
c*****r
发帖数: 529
9
来自主题: Stock版 - This Could Be The End For Big Oil???
http://truthcdm.com/this-could-be-the-end-for-big-oil/
This Could be the End for Big Oil
stunning breakthrough in chemical engineering has unleashed a massive supply
of fuel…
Enough fuel, in fact, to power the entire globe for over 36,000 years.
It’s poised to decimate Big Oil’s obscene profits, make OPEC obsolete, and
hand the United States 100% energy independence.
In fact, the U.S. Department of Defense just invested $7 billion in a single
day…
Apple, Google, and Facebook are spending billion... 阅读全帖
W*****B
发帖数: 4796
10
Preface
If any of the following events should occur:
a peak oil crisis or a World War that results in a significant reduction in
the transportation of food, or
commercial fertilizer becomes scarce or extremely expensive, or
unemployment increases significantly and many families are forced to grow
their own vegetables, or
there is a local, national, or worldwide famine,
then the following information would be extremely valuable to everyone who
has a vegetable garden. The following information wou... 阅读全帖
H********g
发帖数: 43926
11
来自主题: Joke版 - 大气中的氮气是怎么来的
因为氮气和氮的很多化合物都容易以气态逃逸,地球上的氮气含量比宇宙平均值低。
Nitrogen is a common element in the universe, and is estimated to be
approximately the seventh most abundant chemical element by mass in the
universe, the Milky Way, and the Solar System. In these places it was
originally created by fusion processes from carbon and hydrogen in
supernovas.[31] Molecular nitrogen and nitrogen compounds have been detected
in interstellar space by astronomers using the Far Ultraviolet
Spectroscopic Explorer.[32]
Due to the volat... 阅读全帖
H********g
发帖数: 43926
12
来自主题: Joke版 - 大气中的氮气是怎么来的
https://www.soest.hawaii.edu/GG/ASK/atmo-nitrogen.html
简单回答为什么大气里最多:
Reply to ASK-AN-EARTH-SCIENTIST
Subject: Abundance of Nitrogen in Earth's Atmosphere
Why is nitrogen the most common element in the earths atmosphere?
The answer lies mostly in three facts:
1. nitrogen is volatile in most of its forms
2. it is unreactive with materials that make up the solid earth
3. it is very stable in the presence of solar radiation.
To understand the abundance of N in the atmosphere, it is useful to... 阅读全帖

发帖数: 1
13
来自主题: Military版 - 罪恶之城
罪恶之城
我,最近沉默了很多。倒不是我有什么忌讳或者胆怯,只是有一些倦了。我,没有很强
的功利心,这世界上也没有什么我放不下或者必须要得到的东西。我唯一牵挂的就是我
的先生和孩子,他们每天被换来换去,所有的记忆都已走远,我,不能确认他们中任何
一个人,所以,我的心一直就漂浮在空中。因为我不能确认,所以,所有的人,我都是
远远的看着。我,也没有很强的报复心。人,总是要死的。人的一生不过是一种经历。
我相信,伤害我和我家人的人一定会得到报应的。不需要我亲自出手,他们一生也不会
善终,会受尽折磨和痛苦。
我,知道有不同势力在搏斗,但我不属于其中任何一种势力,所以我并不太清楚这些人
出出进进,忙忙碌碌在干什么。虽然我的悟性很高,但我很单纯,想必那种势力也不敢
在我面前曝露身份。因为我是没有秘密的人,自然也存不住秘密。谁在我面前曝露身份
,估计很快就被我出卖了,当然不是有意出卖的那种,而是我心里存不住秘密。你说,
我悟性又高,又存不住秘密,对于那些有秘密的人,实在应该离我远一些。你说,天下
如此之大,幅员广阔,人数众多,你害谁不好害,偏偏对我纠缠不放。我是看淡生死的
人,又无欲无求,又不受威胁,... 阅读全帖
w*****1
发帖数: 220
14
Dear Readers,
We are happy to present the first five papers that are published in our
new, open access journal, Physical Review X. These papers, together with
others that are to be published in the coming weeks into September, will
constitute the first issue of the journal. Under PRX's open access
publishing model, they are free for you to read and use.
We are very encouraged by the breadth of their topical spread. It ranges
from the well-established field of atomic, molecular and optica... 阅读全帖
x**x
发帖数: 92
15
我是在下面的网页看到的
http://www.bodybuilding.com/fun/ammonia.htm
quote:
our body uses amino acids for energy every day. There is no way to avoid
this. Your body constantly goes into catabolic (tissue breakdown) and
anabolic (tissue building) phases. When you accumulate mass (lean or fat),
your anabolic phases exceed your catabolic phases, but you still experience
both phases. When your body uses an amino acid for energy, it must convert
the amino acid to a useable form of energy.
It does this by strippin... 阅读全帖
g****r
发帖数: 306
16
来自主题: gardening版 - Fertilizer upon planting
果树用那种肥比较好。这是网上的一段:
Most people don't know that fruit trees need different fertilizer than other
types of trees. Most trees get a fertilizer with a 4-1-1 ratio of nitrogen,
phosphorus, potash. But giving that much nitrogen to a fruit tree will
encourage it to put out a tremendous flush of vegetative growth with very
few flowers and not much fruit.
A low nitrogen 1-1-1 or 1-2-1 ratio is better. Ideally, the nitrogen
component should be half water insoluble, or slow release, and half water
soluble.... 阅读全帖
l****z
发帖数: 29846
17
来自主题: USANews版 - Wood-Fired Plants Generate Violations
By JUSTIN SCHECK and IANTHE JEANNE DUGAN
BLUE LAKE, Calif.—Malodorous brown smoke from a power plant enveloped this
logging town on April 29, 2010, and several hundred residents fled until it
passed.
Six months later, the plant got $5.4 million from a federal program to
promote environmentally preferable alternatives to fossil fuel.
The plant, Blue Lake Power LLC, burns biomass, which is organic material
that can range from construction debris and wood chips to cornstalks and
animal waste. It is... 阅读全帖
z*****e
发帖数: 14786
18
来自主题: gardening版 - 跪求指点!
精华区看了一遍,还是云里雾里 T_T
成分是这样的:
Total Nitrogen 6%
0.63% Nitrate Nitrogen
2.38% Ammoniacal Nitrogen
0.59% Other/ Water Soluble
0.08% Urea Nitrogen
2.32% Water Insoluble Nitrogen
Available Phosphate (P205) 6%
Soluble Potassium as (K20) 6%
Chlorine, not more than 2%
这样能看出门道吗?
s********n
发帖数: 2939
19
来自主题: Military版 - 普鲁士蓝解毒机理
为什么一帮人就喜欢动嘴皮子不喜欢动手狗一下?明明说了是Fe4[Fe(CN)6]3,哪来的
钾?
https://en.wikipedia.org/wiki/Prussian_blue
Prussian blue
From Wikipedia, the free encyclopedia
This article is about the pigment. For the musical duo, see Prussian Blue.
See also: Midnight blue
Prussian blue
IUPAC name[hide]
Iron(II,III) hexacyanoferrate(II,III)
Other names[hide]
Berlin blue
Ferric ferrocyanide
Ferric hexacyanoferrate
Iron(III) ferrocyanide
Iron(III) hexacyanoferrate(II)
Parisian blue
Identifiers
CAS number 14038-43-8
PubChem ... 阅读全帖
f**********r
发帖数: 18251
20
来自主题: WaterWorld版 - Re: 普鲁士蓝解毒机理 (转载)
【 以下文字转载自 Military 讨论区 】
发信人: smartkevin (PE), 信区: Military
标 题: Re: 普鲁士蓝解毒机理
发信站: BBS 未名空间站 (Wed May 1 11:49:11 2013, 美东)
为什么一帮人就喜欢动嘴皮子不喜欢动手狗一下?明明说了是Fe4[Fe(CN)6]3,哪来的
钾?
https://en.wikipedia.org/wiki/Prussian_blue
Prussian blue
From Wikipedia, the free encyclopedia
This article is about the pigment. For the musical duo, see Prussian Blue.
See also: Midnight blue
Prussian blue
IUPAC name[hide]
Iron(II,III) hexacyanoferrate(II,III)
Other names[hide]
Berlin blue
Ferric ferrocyanide
Ferric hexacy... 阅读全帖
s*********t
发帖数: 4253
21
有一点你误会了,我们这班人(Neohorizon,Jason,jmsma2007 等等人)不是教堂请
来做福音的。我们互相都不认识对方更何况我们的文章从来不提起某个教会。
基督教会如此多派系就算是你信主了(或到那家教会)都与我们完全无关,
我们真的也不想知道!
我教会甚至不知道常常在教堂打瞌睡孤僻的我,原来是如此热心的。Surprise!
(其实主要原因是我的牧师证道太差劲了重复又重复,他说了等于白说!)
当然就算你接受主,我们也没什么好处(~其实我更期望上帝会扔个金砖给我)
我们在这里就纯粹中肯的讨论圣经而已。对就是对,错就是错。
就简单讨论下氮气(nitrogen),氮气变成液体起码也要在超低温-195.8 C( -320.44°
F)而地球最低温记录是-68C,试问如果正常情况(任何仪器都无)
或在300年前有人类能验证液体氮气么?答案是NO。
你想见到液体的氮气是必需要有所行动或更细腻的行动(比如靠仪器)对吧?
同样你想知道上帝是否存在也必需有细腻的行动!
其实上帝所留下的证据多不胜数,关键是你察觉了没有? 《== 这点很重要 importance
就简单聊几个:
1)自古以来... 阅读全帖
s*********t
发帖数: 4253
22
有一点你误会了,我们这班人(Neohorizon,Jason,jmsma2007 等等人)不是教堂请
来做福音的。我们互相都不认识对方更何况我们的文章从来不提起某个教会。
基督教会如此多派系就算是你信主了(或到那家教会)都与我们完全无关,
我们真的也不想知道!
我教会甚至不知道常常在教堂打瞌睡孤僻的我,原来是如此热心的。Surprise!
(其实主要原因是我的牧师证道太差劲了重复又重复,他说了等于白说!)
当然就算你接受主,我们也没什么好处(~其实我更期望上帝会扔个金砖给我)
我们在这里就纯粹中肯的讨论圣经而已。对就是对,错就是错。
就简单讨论下氮气(nitrogen),氮气变成液体起码也要在超低温-195.8 C( -320.44°
F)而地球最低温记录是-68C,试问如果正常情况(任何仪器都无)
或在300年前有人类能验证液体氮气么?答案是NO。
你想见到液体的氮气是必需要有所行动或更细腻的行动(比如靠仪器)对吧?
同样你想知道上帝是否存在也必需有细腻的行动!
其实上帝所留下的证据多不胜数,关键是你察觉了没有? 《== 这点很重要 importance
就简单聊几个:
1)自古以来... 阅读全帖
g*********5
发帖数: 2533
23
来自主题: Biology版 - 核蛋白的Co-IP的 Protocol
Isolation of nuclei for the co-IP and whole ChIP protocols is based on the
methods of Gendrel et al. (2002, 2005), Johnson et al. (2002), and Nelson et
al. (2006).
METHOD
For extraction and co-IP of nuclear proteins, see Steps 1-39 (Fig. 1). For
the ChIP procedure, see Steps 40-69 (Fig. 2).
Figure 1.
View larger version:
In this page
In a new window
Figure 1.
Flowchart for the timeline and organization for co-IP of nuclear proteins
from Arabidopsis seedlings.
Figure 2.
View larger versio... 阅读全帖
a**e
发帖数: 8800
24
Net: 为了所谓的绿色能源,2007,在左派推动下,立法要求在汽油里加入ethanol。
O8大力推动种植玉米生产ethanol。仅仅6年,后果已经在那里了。
大面积的原始植被/湿地变成玉米地,水土流失,被化肥污染的水进入水系,甚至影响
到饮用水,流入的污染水在墨西哥湾造成大面积的死亡区,水体生物灭绝。
最有意思的地方在于,生产ethanol的前期后期要花费的能量比生产出的ethanol能产生
的能量多。
AP Investigation: Obama's green energy drive comes with an unadvertised
environmental cost
http://news.yahoo.com/secret-dirty-cost-obamas-green-051200204.
CORYDON, Iowa (AP) -- The hills of southern Iowa bear the scars of America's
push for green energy: The brown gashes where rain has washed ... 阅读全帖
g*******1
发帖数: 2799
25
网上找了点资料
Yes, you can fill ’em up with ordinary air, which is cheaper and more
widely available. Air is 78 percent nitrogen, so by refilling the tires with
regular air you’re just diluting the nitrogen content, which was
originally probably around 95 percent. The key benefit of nitrogen is that
it permeates out of tires at a slower rate than oxygen, which is 21 percent
of air, so in theory you shouldn’t have to check or fill your tires more
often
M********8
发帖数: 3837
26
关于储存后能再用的时间,下面是一个cord blood bank自己的说法,现有的资料数据
只能支持15年的保存使用期。理论上的无限期,跟临床上的数据,其中还是有一定距离
的。
7. How long can cord blood stem cells be stored in liquid nitrogen?
“There is no evidence at present that [cord blood stem] cells stored at
minus 196 degrees Celsius (in liquid nitrogen) in an undisturbed manner lose
either in vitro-determined viability or biological activity. Therefore, at
the current time, no expiration date need be assigned to cord blood stored
continuously under liquid nitrogen.”1
Stem c
S*********g
发帖数: 24893
27
来自主题: Stock版 - 推荐铂金,platinum (转载)
超老的文章了
但是我觉得只要中国人,印度人,巴西人还要发展,就要铂金做汽车,搞化工
Catalytic-converter production in Shanghai: global demand for the units is
surging.Catalytic-converter production in Shanghai: global demand for the
units is surging.JOHNSON MATTHEY PLATINUM 2004
Lovers may adore platinum's silvery sheen in their favourite jewellery —
but at least they can switch to gold or silver if the price isn't right.
Chemical engineers wish they had the same option.
Thanks to their role in catalytic converters, platinum, palladium ... 阅读全帖
s*****i
发帖数: 5548
28
☆─────────────────────────────────────☆
xie91 (bob) 于 (Mon Mar 4 19:12:18 2013, 美东) 提到:
发信人: kylin1996 (kylin), 信区: SanFrancisco
标 题: Re: 再谈德州经验 (转载)
发信站: BBS 未名空间站 (Mon Mar 4 17:16:16 2013, 美东)
看见有人说湾区收入高就笑了,给你们科普一下,猴子屯,13-15w年薪非常普通,20w
以上的一大把,加上公司100% match 6-12% 401k, 公司服务到退休有一次性上百万的
pension,还有一周工作四天一周工作五天,每年5周vacation,加州风景再美,这些能
比吗?
☆─────────────────────────────────────☆
delubo (I shall be your eyes!) 于 (Mon Mar 4 19:13:42 2013, 美东) 提到:
求介绍工作,我要跳槽
☆────────────────────────────... 阅读全帖
f*1
发帖数: 837
29
来自主题: gardening版 - 新人请教草坪
总算知道legender是男是女了:-)
自从膝盖受伤后,就几乎不打球了。
It is good that what you have is Bermudagrass, as sometimes people say it is
virtually indestructable. I highly recommend that you follow what's
described here in the "Bermuda Bible". If you don't understand some terms
or procedures, feel free to ask here.
http://aroundtheyard.com/the-news/71-bermuda-bible.html
I don't know anything about lawn service companies, as I have never used
them so I can't judge. But it wouldn't hurt to hear what others say about... 阅读全帖
f******s
发帖数: 178
30
来自主题: gardening版 - 请问草地施肥多长时间一次?
肥料的袋子上面有N/P/K的百分比, 比如说16-4-8, 16%的氮, 4%的磷, 8%的钾,
Nitrogen-向上长,长叶
P-向横长,分支
K-向下长,长根
如果16-4-8, 16%的氮, 六磅的肥是1磅的氮,6 lbsx16%=0.96 lb. of Nitrogen,5
磅氮需要30磅的肥.
有机肥的有效成分低, 缓慢释放,不会烧死草地。价高, 要用很多量。
合成的化肥, 有效成分%高, 便宜, 可能会烧死草。肥是从根子/土壤吸收的, 如果
残留在叶子上, 草叶子会变盐咸菜。
算肥料, 都是面积来算。需要知道自己的草地面积。
Lawn Fertilization: Maintaining the bluegrass lawn will require
approximately 3 to 5 lbs. of Nitrogen per 1000 square feet yearly. The
actual amount needed is usually spread over 3 to 4 applications during the
year and amounts... 阅读全帖
d********f
发帖数: 43471
31
来自主题: Joke版 - 二次无机气溶胶
这是那个文科傻妞自己加的把,根本没有任何直接关联,英文原文是这样的
Photochemical smog[edit]
Photochemical smog was first described in the 1950s. It is the chemical
reaction of sunlight, nitrogen oxides and volatile organic compounds in the
atmosphere, which leaves airborne particles and ground-level ozone.[14] This
noxious mixture of air pollutants can include the following:
Aldehydes
Nitrogen oxides, such as nitrogen dioxide
Peroxyacyl nitrates
Tropospheric ozone
Volatile organic compounds
All of these harsh chemicals are usua... 阅读全帖
c**i
发帖数: 6973
32
Well. I learn something from you. I did not know cats in US get to receive
dialysis or kidney transplantation in US.
You should stop blaming yourself. Like humans which I am familiar with,
there are many causes for an animal to get chronic renal failure (CRF),
including kidney infection. Judging from the age of your cat, it is unlikely
that the CRF is derived from eating pet food that was imported from China
and laced with wheat gluten. See
2007 pet food recalls
http://en.wikipedia.org/wiki/2007... 阅读全帖
m********n
发帖数: 953
33
where can i buy it?
弟媳妇的原信再此,要我帮着买,但是偶一窍不通啊
原信在此:
我们需要购买美国或日本制造的微生物肥料,在日本可能称为微生物土壤改良材料或微
生物肥料。在美国可能称为接种剂,微生物肥料或生物肥料。
微生物肥料英文名称Microbial fertilizer
微生物肥料主要有效成分为一些促进植物生长的细菌,简称促生菌(Plant growth
promoting rhizobacteria)
包括以下一种或几种菌种均可:
1)固氮菌(nitrogen-fixing bacteria)
①自生固氮菌(Self-nitrogen-fixing bacteria):代表菌是圆褐固氮菌Azotobacter
chroococcum,此外还有棕色自生固氮菌(A. vinelanii) 敏捷氮单胞菌(A. agilis)
印度拜耶林克氏菌(Beijerinckia indica),在研究固氮作用时经常使用自生固氮菌
②联合固氮菌(Combined nitrogen-fixing bacteria):固氮螺菌属是被研究得最多
的一类。常用的菌种是巴西固氮螺菌Az
b*****n
发帖数: 75
34
吴平自称是国际水稻研究所(IRRI)(菲律宾)博士 (看浙大网页).http://mypage.zju.edu.cn/personnelCard/wuping
学 历
1978.9-1982.8 浙江农业大学土化系,本科
1985.9-1988.8 浙江农业大学土化系,硕士
1989.10-1993.3 国际水稻研究所(IRRI)(菲律宾)博士
其实这样的研究所是没学位授予权的.下面一段来自IRRI.
http://training.irri.org/scholars-program/degree-program
IRRI Research Scholar - “These are students from the public or private
sector, developing and developed countries that come to IRRI to work on
their MS or PhD degree research. All Scholars are registered with a
univers... 阅读全帖
r*******1
发帖数: 28
35
浙江大学副校长吴平学历
吴平自称是国际水稻研究所(IRRI)(菲律宾)博士 (看浙大网页).http://mypage.zju.edu.cn/personnelCard/wuping
学 历
1978.9-1982.8 浙江农业大学土化系,本科
1985.9-1988.8 浙江农业大学土化系,硕士
1989.10-1993.3 国际水稻研究所(IRRI)(菲律宾)博士
其实这样的研究所是没学位授予权的.下面一段来自IRRI.
http://training.irri.org/scholars-program/degree-program
IRRI Research Scholar - “These are students from the public or private
sector, developing and developed countries that come to IRRI to work on
their MS or PhD degree research. All Scholars are registered wi... 阅读全帖
c*******e
发帖数: 170
36
来自主题: Chemistry版 - 求教:氮气能解离成氮原子吗?
From my experience, I dont think it is possible that the jet will induce the
dissociation of N2. You said there is resonant ionization by laser. I
would ask what kind of you are using, especially for the pulse duration and
wavelength.
Let's consider this problem in two ways:
1. Suppose what you have seen is really Nitrogen atomic ion. The most
likely mechanism should be Nitrogen molecule absorbs the photon(s) to
dissociation, and Nitrogen atom is ionized by other photons. However, the
highe
l***o
发帖数: 7937
37
尼玛,虽然没死,胃切除了一半,八周才恢复也算没事?
I subsequently learned a few things about liquid nitrogen. While you can
safely hold it in your mouth and blow neat smoke patterns, you should never,
ever swallow. The closed epiglottis prevents the gas from escaping, so
expanding gas is forced into your body. And your esophagus naturally
constricts around anything inside it, so even though there is a thin
protective gas layer, the esophagus will manage to make contact with the
liquid nitrogen. (解释了为什么不能咽下去,尼玛咽下去是找死)
I ... 阅读全帖
T**********e
发帖数: 29576
38
SpaceX的实用F9火箭一千米回收实验

SpaceX plans to recover stages when customers allow
BY STEPHEN CLARK
Encouraged by the soft landing of a Falcon 9 rocket's first stage in the
Atlantic Ocean after liftoff April 18, SpaceX plans a series of stage
retrieval tests over the next few months, but only on missions where the
launcher has enough leftover fuel to accomplish the complicated re-entry
maneuvers required to safely return a rocket to Earth.
SpaceX hopes the experiments will lead to returning a rocket i... 阅读全帖
W*****B
发帖数: 4796
39
You Can Compost Human Waste!
More and more people are discovering the water- and money-saving benefits of
fertilizing their gardens with human waste. It’s not just for homesteaders
anymore!
By Carol Steinfeld
April/May 2011
Oceans of sewage. Tapped-out water sources. Ever-costlier fertilizers. A
flurry of recent studies warn of resource scarcity for the world’s cities.
Fortunately, a growing legion of urban dwellers think the nutrients and
water in their toilets are too valuable to flush away. F... 阅读全帖
c*****g
发帖数: 21627
40
来自主题: USANews版 - 美国下一次繁荣的宠儿
Excellent article
英文原文:
Barron's Cover | MONDAY, JANUARY 28, 2013
The Next Boom
By KOPIN TAN
Cheap natural gas and increasingly competitive labor costs are bringing
factories and jobs back to the U.S. Eight ways to win.
As the only industrialized superpower not decimated by World War II, the
United States once made nearly 40% of the planet's goods. These days, that
number has shrunk to 18%. We make American Girl dolls in China, Levi's jeans
in Mexico, and enough movies in Vancouver to nickname ... 阅读全帖
f*****y
发帖数: 142
41
来自主题: Automobile版 - Emission Controls - Demystifying NOx
very good article on emission control.
===========================================
http://www.gatewaycleanair.com/mechanic/air4_3/nox.htm
Emission Controls - Demystifying Oxides of Nitrogen
By Steve Zack
Oxides of Nitrogen (NOx) are one of the four pollutants emitted by internal combustion engines. The others are carbon monoxide (CO), hydrocarbons (HC), and sulfur dioxides (SO2). Like the other three gasses, excessive amounts of NOx are the by-product
of engines operating under something other t
s******2
发帖数: 282
42
来自主题: Automobile版 - 今天做完inspection
另外做了alignment和fill nitrogen for 4 tires
现在感觉比以前平稳很多,加速也比以前好,不知道是alignment还是nitrogen的作用
tire是半年前换的, 平衡和alignment都校准过
Lesson:趴车要注意千万不能趴到马路牙子上,Cost: $100
a*******a
发帖数: 825
43
来自主题: Automobile版 - 在线等~~熟悉accord的同学请进
已经准备去打气了。顺便问下,有个人说要打nitrogen,这种一般加油站能打吗?还是
需要去修车的地方打?还是其实不一定要打nitrogen?
s*****3
发帖数: 1673
44
来自主题: Automobile版 - Shell和Cheveron的油有啥区别么
This is what I got in shell website.
http://www.shell.us/products-services/on-the-road/fuels/v-power
"Shell V-Power Premium Gasoline is our best, most advanced gasoline that
contains the highest concentration of the New Shell Nitrogen Enriched
Cleaning System, a unique and patented formula exclusive to Shell. "
So shell has a so called "Nitrogen Enriched Cleaning System".
For Chevron
http://www.chevronwithtechron.com/products/gasoline.aspx
This is what is announded by Chevron
Benefits of Chevr... 阅读全帖
A*******m
发帖数: 2326
45
来自主题: Automobile版 - Base 2014 BMW x1
你们州税够低的
Accessories $783.87 (window tint, wheel locks, nitrogen, & trunk tray)
真牛逼居然还有nitrogen。。。
c*******a
发帖数: 30
46
来自主题: Automobile版 - 请问2014 Odyssey EXL quote 几个问题
是银行代理网上给的价格
2014 Odyssey EXL with RES and Pro Pack
MSRP-$39242
$Price -$35555
OTD - $38791
Pro Pack 包括Mud Guards, body side moulding, wheel locks and nitrogen filled
tires.
问题1:nitrogen filled tires有什么好?很贵么?
问题2:价钱是不是贵了些?
谢谢!
l******l
发帖数: 209
47
来自主题: Automobile版 - odyssey 2015 ex-l报价
恭喜,价格很好了。
请问floor mat, splash guard, nitrogen tire 是EXL 的标配么?
我买的时候没有 splash guard,tire怎么看是否是nitrogen的呢?我车的轮胎是
CONTINENTAL, 貌似不是什么好牌子
D***0
发帖数: 5214
48
来自主题: Automobile版 - 大众柴油车造假事件发现始末
好像另外一个帖子也提到这个NOx是哪儿来的问题。麻烦大家发言之前先google/wiki:
http://en.wikipedia.org/wiki/NOx#Industrial_sources_.28anthropo
sources.29
The three primary sources of NOx in combustion processes:
1 thermal NOx
2 fuel NOx
3 prompt NOx
Thermal NOx formation, which is highly temperature dependent, is recognized
as the most relevant source when combusting natural gas. Fuel NOx tends to
dominate during the combustion of fuels, such as coal, which have a
significant nitrogen content, particularly when burned in combus... 阅读全帖
n**********o
发帖数: 1016
49
看这位,就是一般的工科教授而已,完全没有所谓的两点啊。懂行的说说。
https://www.macfound.org/fellows/930/
Kartik Chandran
Environmental Engineer
Associate Professor, Department of Earth and Environmental Engineering
Columbia University
New York, New York
Age: 41
Published September 28, 2015
Kartik Chandran is an environmental engineer integrating microbial ecology,
molecular biology, and engineering to transform wastewater from a
troublesome pollutant to a valuable resource. Traditional facilities for
biologically treating waste... 阅读全帖
d**********0
发帖数: 13081
50
来自主题: Living版 - 草地入冬前洒肥料一问
http://realestate.msn.com/article.aspx?cp-documentid=13108324
1. Feed that lawn! "Right now, it's key to work on your lawn," says Jim
Welshans, regional turfgrass educator at Penn State University. In fact,
despite what many people might think, autumn, not spring, is perhaps the
most vital time in many parts of the country. Welshans explains: "In
Pennsylvania we grow cool-season grasses, and during the summer they're not
very active." Come autumn, however, they revive.
Lawns with these cool-weat... 阅读全帖
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