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Messages 8371 - 8400 of 13930   Oldest  |  < Older  |  Newer >  |  Newest
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8371
Elise <cuixl1@...> wrote:Normally I use Excel or Origin to get titration curves for several kind of titration. For example, UV, CV, NMR and so on. ...
محمدحافظ
mido_2180891
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Jul 1, 2005
3:57 pm
8372
What about trying different concentrations of your proteinic solution? Sometimes, an acute use of the experimental curves provides very interesting...
breizh_cymru
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Jul 1, 2005
9:08 pm
8373
I was told that the device in the movie "blow" with johny Dep was real. I didn't think so, does anyone know the name of the device that was used to test the...
misterdreadman
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Jul 3, 2005
1:31 pm
8374
thanks for the answer about the question is not from a joke my clasmate taking up material science and has given a research project about this element i told...
Marco de Leon
mharcoh75
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Jul 3, 2005
2:16 pm
8375
I answered your question in message No. 8314. I haven't seen "Blow." No one here has seen "Blow." Please give a detailed description of the story. What was the...
Steve
steve_geo1
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Jul 3, 2005
4:05 pm
8376
I didn't see the movie, but if you have solution and you want to measure the sodium or potassium concentration, there is a device I am vaguely familiar with...
brianejensen
brianedwardj...
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Jul 3, 2005
5:04 pm
8377
hello I hope you be well. I want know whats mining of 1 ppm in the gases? 1 ppm O2 is 1 mgr/litre O2 in backgroud gas or not? could you please help me. BEST...
m_ayaz2005
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Jul 4, 2005
9:25 am
8378
HELLO I HOPE YOU BE VERY WELL ppm means the number of milligrams of a matter in one litre of solvent. so it is true when you say that 1 ppm O2 is 1 mgr/litre...
ALI NASSER
free3hyder
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Jul 4, 2005
9:41 am
8379
I see it differente 1 ppm is 1 mililiter of a gas in one cubic meter of air. In gases ppm is measuring volume of a gas in 1 million volume of air...
galopus
Offline
Jul 4, 2005
9:59 pm
8380
I think ppm always is a weight ratio, grams per million grams total or milligrams per kilogram total or grams per metric ton total regards, Brian ...
brianejensen
brianedwardj...
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Jul 5, 2005
5:16 am
8381
brian is correct. sometimes mass/volume is used commonly when one is dealing with water such as in environmrntal labs, where the density of the medium is...
artfullwill
Offline
Jul 5, 2005
9:45 pm
8382
... //////////////////////////////////////////////////// I be well. The mining of the term "PPM" can be esoteric, so mining students have to DIG for it....
rogersieloff
Offline
Jul 6, 2005
3:04 pm
8383
Hi all, I just found this group and I'm hoping you guys and girls can help me. I'm trying to analyze a few steroids using a Beckman Coulter Pace/MDQ CE, I'm...
draconis1us
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Jul 6, 2005
4:36 pm
8384
no peaks? as a gas chromatographer i think; 1 detector problem 2 no resolution, seperation ... Coulter...
artfullwill
Offline
Jul 6, 2005
5:11 pm
8385
... 1.) well, maybe not. I believe you ran the standards without any problem, no? Have you run the standards again after you failed to get sample results? ... ...
rogersieloff
Offline
Jul 6, 2005
7:11 pm
8386
The test standard works consistantly, the detector shouldn't be a problem as we have used the same basic detector hooked to an HPLC and we see peaks on it. As...
draconis1us
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Jul 6, 2005
7:26 pm
8387
I'm a engineering major student taking General Chemistry II class. I have started that class two years ago and dropped it. At that time I purchased "Chemistry...
bigusk
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Jul 7, 2005
3:32 am
8388
CHEMISTRY,BIOLOGY,HEALTH AND AGRICULTURAL SCIENCE TEACHERS NEEDED A CONSORTIUM OF GOVERNMENT SCHOOL IN NIGERIA IS LOOKING FOR CHEMISTRY,BIOLOGY,HEALTH AND...
greelink_recruitment
greelink_rec...
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Jul 7, 2005
9:29 pm
8389
I've been playing around with an organic modeling kit, making the various breakdown products of ethanol for fun. I've noticed that my textbook for chem only...
vincemo22
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Jul 8, 2005
2:37 pm
8390
... ever ... Vinyl alcohol is used quite alot in adhesives. It is polymerized into polyvinyl alcohol which is what white glue is composed of. Geraniol is known...
rogersieloff
Offline
Jul 8, 2005
7:38 pm
8391
Yes, alcohols which are also alkenes or alkynes also exist. Where the -OH is attached to one of the unsaturated double- or triple-bonded carbons, the compound...
JohnWW
johnwwxtraconz
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Jul 8, 2005
8:02 pm
8392
Hi Vince! In a sense, ethenol, CH2=CH-OH, also called vinyl alcohol, does not exist. If it were formed in a reaction, it would "tautomerize" into acetaldehyde,...
Steve
steve_geo1
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Jul 8, 2005
8:54 pm
8393
Does anyone know the IR stretches or bends of SiOCH3? How about Si-C stretching?...
betterlivingthruchemi...
betterliving...
Offline
Jul 11, 2005
3:48 am
8394
A good place to find information like this is at the NIST Chemistry Webbook at http://webbook.nist.gov/ You can search molecules and get spectra of many of...
Timothy V. Duncan
corribus
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Jul 11, 2005
4:50 am
8395
Dear all, I had some problem would like to ask for help. Is there any one know about the water treatment for the cooling tower, especially for the bacteria ...
Kevin Lee
kevin77_jb
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Jul 12, 2005
9:36 am
8396
Bacteria should not be a problem in the water used in cooling towers, as the water is not intended for human or animal consumption, unless fecal coliform is...
JohnWW
johnwwxtraconz
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Jul 12, 2005
10:21 am
8397
I would not use copper in a cooling tower system. It can cause serious corrosion issues if it plates out on any matal in the system. We typically use solid...
jkoers
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Jul 12, 2005
1:48 pm
8398
Kevin, You can find various sources on the web for waste water treatment. The water is ultimately returned to the local resource, for example, a river. The...
Nathan Haese
nathanhaese
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Jul 12, 2005
3:17 pm
8399
Bacteria CAN be a problem with cooling tower water. Remember Legionnaire's Disease? The mist from the tower was drawn into fresh air intakes for the building...
Timothy McGovern
tdm0963
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Jul 12, 2005
5:01 pm
8400
Dear Kevin, There are many people knowledgeable in this field. They will have many questions: 1. What is the total volume in your system? 2. Maybe you are a...
brianejensen
brianedwardj...
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Jul 12, 2005
8:57 pm
Messages 8371 - 8400 of 13930   Oldest  |  < Older  |  Newer >  |  Newest
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