• Re: flame aas method for glukoz and non-glukoz dialysşs solution

    Updated: 2010-09-07 07:58:16
    You cannot measure glucose in a direct way with AAS. You need an atom which you can excitate in the flame. Carbon and oxygen do not belong to these atoms. Besides this you use usually acetylene, air and/or nitrous oxide to feed the flame...

  • Re: Comparing the average distance of two atoms with the size of the atom alone

    Updated: 2010-09-07 07:47:51
    Atoms in gas are not touching their neighbors. In solids and liquids you may assume they do, but not in gases.Note that your approach will give size highly dependent on the temperature and pressure, that's not the case.

  • Re: XPS spectrum vs. Aufbau principle

    Updated: 2010-09-07 07:42:25
    Thanks a lot for the explanation.You say 4s electrons are more tightly bound. But then I would expect the signal of 4s electrons in higher regions of the spectrum. Isn't it then the other way around? 3d electrons are more tight than 4s?So this means if an orbital is on lower energy level the electrons are not necessarily bound more tightly? Is this right? It would be really weird for me.

  • HPLC problem

    Updated: 2010-09-07 07:35:04
    Hello everybody,I got one problem in Prep HPLC column. The single peak gets splitted into many. If anybody has idea about fixing this problem then please suggest me as soon as possible.

  • Re: solubility problem

    Updated: 2010-09-07 07:34:11
    UserInfo : September 06, 2010, 09:03:38 PM Welcome , Guest Please login or register Did you miss your activation email 1 Hour 1 Day 1 Week 1 Month Forever Login with username , password and session length Forum Rules Read This Before Posting Home Help Search Calendar Login Register Search Chemical Forums ChemicalForums , Google Chemistry-Blog Art from molecular models Chemistry-Blog.com Google Sponsors Content ChemBuddy ChemFeeds Chemical Forums Chemistry Blog Chem Reddit : Resources General Chem Word Dict . Periodic Table Chemical Forums Chemistry Forums for Students Undergraduate General Chemistry Forum Moderators : tamim83 Dan solubility problem Pages : 1 Go Down previous next Print Author Topic : solubility problem Read 226 times 0 Members and 2 Guests are viewing this topic . Danial

  • This week on Chemistry World…

    Updated: 2010-09-06 15:52:33
    6September 2010: Have something to say about an article you’ve read on Chemistry World this week? Leave your comments below… . Are you sure that structure is right? A new computer program can tell how likely a chemical structure is to be right or pick the right isomer from a range of possibilities Nanocoat for restoring historic paintings Historic wall [...]

  • ACS Feeds: Two Steps Forward and One Step Back

    Updated: 2010-09-05 06:58:21
    I know everyone hates rss posts, but the latest ACS feeds updates is causing havoc for chemists dependent on their graphical abstracts fix (3000 people have visited the JACS feed in the past 9 months through ChemFeeds). It was bad enough that it dragged me from experiments to patch ChemFeeds and make me write this [...]

  • New Edible Nanostructures Could be Used for Medical Applications

    Updated: 2010-09-03 17:30:19
    A research team Northwestern University has discovered a new class of nanostructures that could be used for medical technologies and a variety of other applications. The edible porous crystals are said to be the first known all-natural metal-organic frameworks (MOFs) that are simple to make. “They taste kind of bitter, like a Saltine cracker, starchy and [...]

  • Periodic Table of Google Elements

    Updated: 2010-09-03 17:00:46
    This Periodic Table has even less to do with chemistry than my PT of science bloggers. Regardless, it’s still worth a mention, just because it hints at chemistry however indirectly. More periodicity A Periodic Table of Google Elements Using the Periodic Table Blogging the Periodic Table: Rare earths Related Posts:Real chemistry at the periodic table [...]Periodic Table of Google Elements is a post from: Sciencebase Science Blog

  • September edition of the Chemistry World podcast is now online

    Updated: 2010-08-31 16:34:36
    Have a listen to this month’s Chemistry World podcast to hear Mike, Nina and Matt talking about edible chemistry, turning carbon dioxide into plastic and deciphering the structure of molecules just by looking at them (with an atomic force microscope, that is). We’ve also got interviews with Yale University’s Allison Carey on how mosquitoes sniff out [...]

  • This week on Chemistry World…

    Updated: 2010-08-31 14:37:45
    31August 2010: Have something to say about an article you’ve read on Chemistry World this week? Leave your comments below… This week’s stories… Man charged in Dow trade secrets case A former Dow research scientist has been charged with stealing trade secrets First steps of water condensation observed Chemists watch as condensing water under ambient conditions forms as layers as [...]

  • 16th RSC-SCI Medicinal Chemistry Symposium at Churchill College in Cambridge

    Updated: 2010-08-30 16:57:07
    The first circular for the 16th RSC-SCI Medicinal Chemistry Symposium, 11-14 September 2011, Churchill College, Cambridge, UK is now available here. The Scientifc Program includes:- Strategies to success – H-PGDS inhibitors for the treatment of inflamatory disorders, Sukanthini Thurauratnam, Sanofi -Aventis Discovery on next generation glucokinase activators, Mike Waring, AstraZeneca Inhalation by design, Paul Glosson, Pfizer Bromodomains a new [...]

  • So, What’s the Deal With Iridium?

    Updated: 2010-08-28 04:08:04
    August 27, 2010.  The industrial Platinum Group Metal market during the summer of 2010 is for the most part as featureless and stagnant as a Nevada salt flat. Industrial PGM prices deflated late in the second quarter from a local price maximum in April of this year. Platinum, Palladium, Rhodium, and Ruthenium prices have since late [...]

  • Alan Simpson to Receive Honorary Degree

    Updated: 2010-08-26 19:54:21
    Guapo, Arizona.  University Chancellor Dr. Tina Grimstone issued a press release containing the annual list of Honorary Degrees to be conferred by Pultroon University at the spring 2011 commencement.   Notable are three awardees from the State of Wyoming, former US Senator Alan Simpson, former Sectretary of the Interior James Watt, and former Vice President Richard “Dick” [...]

  • The American gold rush and relativistic electrons

    Updated: 2010-08-25 06:49:44
    Exactly why do people value gold? Is all of the allure of gold due to its color? What if gold metal did not have the golden color? Instead, what if it had a silver luster like its neighbors on the periodic table of elements? Would we find it quite so appealing? There are many reasons why [...]

  • Professor claims Lincoln was wrong; southern states should have been let go.

    Updated: 2010-08-22 00:37:40
    Guapo, Arizona.  A political science conference held to reexamine the American Civil War has produced some surprising and controversial conclusions. At a news conference sponsored by Pultroon University, a spokesperson for the Office of University Affairs tried to assure reporters that the event was in fact a scholarly meetiong and not part of a political movement.  Meeting organizer and political science professor Udo Rotmensen spoke at [...]

  • Some Questions

    Updated: 2010-08-18 15:57:04
    What do farmers think of crop circles? Isn’t it just … vandalism? Is there such a thing as crop circle insurance? Many of the fellows who boarded the three ships at Griffins Wharf and pulled off the Boston Tea Party were disguised as Mohawk Indians. How patriotic or heroic is it to destroy property and attempt [...]

  • Daytripping in Gold Hill and Wall Street

    Updated: 2010-08-15 19:37:39
    The Gold Hill mining district northwest of Boulder, Colorado, is dotted with many signs of mining activity from an earlier time. This district is adjacent to the towns of Ward and Nederland and situated in the northeastern extreme of the Colorado Mineral Belt (CMB).  The first significant gold lode discovery of the 1859 Colorado Gold Rush [...]

  • Cogitations on the sunflower

    Updated: 2010-08-12 06:00:39
    My morning commute through the countryside takes me past more than a few fields of sunflowers. By late July the flowers are out and without exception, all nodding toward the east where a star appears every day. Many of the local farmers have taken to raising sunflowers rather than the usual corn and sugar beets.  I haven’t [...]

Previous Months Items

Aug 2010 | Jul 2010 | Jun 2010 | May 2010 | Apr 2010 | Mar 2010