• 1,3-dimethyluracil

    Updated: 2010-01-31 15:21:25
    Hi,I am trying to search for the information on the properties and the use of 1,3-dimethyl-uracil but couldn't find much info. Can someone please help me? Thanks.

  • Re: Calculate the percent by mass? using molality

    Updated: 2010-01-31 14:10:54
    I still dont understand 

  • Re: Chem Lab conclusion help...

    Updated: 2010-01-31 14:03:36
    The copper and zinc alloy is brass. Bronze consists of copper and tin.Although, it seems in English the terms are sometimes used interchangeably.

  • Re: plz .. help me i have some problems !

    Updated: 2010-01-31 11:10:05
    Quote from: Schrödinger on Yesterday at 10:13:07 PMYes that's fine. 14 and 15 are simple now, i guess.Now try Qn. no 16.yup .. i tried 3 time before but i don't now how the way to answer it !  nd after 1 day i will do exam in bioChemistry ..  lz again .. can you help me for this question 16!

  • O Level Chemistry: Periodic Table & Group Trends

    Updated: 2010-01-30 19:31:08
    More Chemistry Tips & Exam Strategies (Photo by ma-kasu) In Chemistry, Periodic Table has long been regarded by students, educators and chemists as the “Bible” of Chemistry. We need to have a good grasp of the General Features & the important Patterns (Group Trends) in order to appreciate many other topics and to score in exams. General Features of [...]

  • O Level Chemistry: Particulate Nature of Matter / Kinetic Particle Theory 2

    Updated: 2010-01-29 05:10:29
    (Photo Courtesy Loupe Clean) In the previous post, i have discussed on the overview checklist that students need to know about this topic of Particulate Nature of Matter (commonly known as Kinetic Particle Theory). Besides the “connection between relative molecular mass of a gas & its rate of diffusion” which is listed as very important, students should [...]

  • Naked-eye colorimetric analysis of heparin and its derivatives

    Updated: 2010-01-28 14:00:00
    A new colorimetric technique could provide a rapid, naked-eye assay of heparin levels in serum.

  • NanoPropulsion

    Updated: 2010-01-17 07:42:45
    Stephen J. Ebbens Jonathan Howse The current state of the art in nanopropulsion devices was recently reviewed by Ebbens and Howse in an article last Friday.[SoftMatter] A short summary of the nano- systems is presented below with video action shots when I could find them. The Whitesides Catalyst: Pt Fuel: H2O2 Propulsion: Bubble propulsion Terrain: Aqueous meniscus Max Speed: 2 cm/s Mitch’s Name: The [...]

  • O Level Chemistry: Particulate Nature of Matter / Kinetic Particle Theory

    Updated: 2010-01-15 11:46:19
    Last Sunday, i met the new group of students for the 2010 Sun Sec 3 Chemistry Class under Ultimate Leap Programme. Since it was the 1st session, i decided to start with a very basic topic known as Particulate Nature of Matter, otherwise known as Kinetic Particle Theory to many. This should be something that most [...]

  • Raman microscopy maps of drug-delivery vehicles

    Updated: 2010-01-14 14:00:00
    A Raman mapping technique provides spatial information on the chemical makeup of microspheres.

  • Sodium Chloride

    Updated: 2010-01-11 17:15:42
    (for other entries in the Chemistry in Space series, click here) The below picture is of sodium chloride crystals.  I’ve made them dozens of times in left over aqueous layers that have been in my hood so long that all the water evaporated. Crystalline sodium chloride is one of my favorite crystals to grow.  Very easy (although [...]

  • Speedy Surface Explorations with Principal Component Analysis

    Updated: 2010-01-07 14:00:00
    A new technique using PCA for nonlinear optical Stokes ellipsometry data brings the speed of surface analysis up to the pace of data collection.

  • Diagnostics for the Developing World: Microfluidic Paper-Based Analytical Devices

    Updated: 2010-01-07 14:00:00
    Microfluidic paper-based analytical devices (μPADs) are a new class of point-of-care diagnostic devices that are inexpensive, easy to use, and designed specifically for use in developing countries.

  • Sample Journal of Chemical Education Now Available Online

    Updated: 2010-01-06 16:30:00
    The January 2010 sample issue of the Journal of Chemical Education (JCE) is now available for viewing on the ACS Web Editions Platform. This issue marks the official beginning of the partnership between ACS Publications and the ACS Division of Chemical Education in the co-publication of the premier journal for chemical education. You can view a video interview with Editor-in-Chief Norbert J. Pienta, in which he affirms his commitment to continue publication of "all of the high value, quality material that people have expected all these years," and notes the addition of Associate Editors to help assign reviewers and adjudicate manuscripts as well an Editorial Advisory Board to help shape the vision for the journal of the future.

  • Official: Release of 2009 GCE ‘O’ Level Results on 11th January 2010

    Updated: 2010-01-06 16:11:56
    It’s official! School candidates may collect their results from their schools at 2.00 pm on 11 January 2010. Private candidates will be informed of their results by post. They may also access their results through the Singapore Examinations and Assessment Board (SEAB) website from 2.00 pm on 11 January 2010. More details here: http://www.moe.gov.sg/media/press/2010/01/o-level-results-jae-jpsae-2010.php All the best to your [...]

  • How to Present Effectively with PowerPoints

    Updated: 2010-01-04 09:16:52
    (Image by barbara_nixon) How to Design & Deliver Your Presentations using PowerPoints That Sizzles! I have been presenting for many years (formally and informally), and have gone into coaching for quite awhile. Many people ask me what is the best form of presenting to grab the audience’s attention and to achieve the end results that we aim [...]

  • Extreme makeover chemistry style

    Updated: 2009-12-29 14:46:50
    In revisiting a chemical reaction that's been in the literature for several decades and adding a new wrinkle of their own, scientists with Berkeley Lab and the University of California (UC) Berkeley have discovered a mild and relatively inexpensive procedure for removing oxygen from biomass. This procedure, if it can be effectively industrialized, could allow a number of of today's petrochemical products, including plastics, to instead be made from biomass........

  • Chemists synthesize herbal alkaloid

    Updated: 2009-12-29 14:46:50
    The club moss Lycopodium serratum is a creeping, flowerless plant used in homeopathic medicine to treat a wide variety of ailments. It contains a potent brew of alkaloids that have attracted considerable scientific and medical interest. However, the plant makes a number of of these compounds in extremely low amounts, hindering efforts to test their therapeutic value........

  • New perspective on periodic table

    Updated: 2009-12-29 14:46:50
    Transforming lead into gold is an impossible feat, but a similar type of "alchemy" is not only possible, but cost-effective too. Three Penn State scientists have shown that certain combinations of elemental atoms have electronic signatures that mimic the electronic signatures of other elements. As per the team's leader A. Welford Castleman Jr., Eberly Distinguished Chair in Science and Evan Pugh Professor in the Departments of Chemistry and Physics, "the findings could lead to much cheaper materials for widespread applications such as new sources of energy, methods of pollution abatement, and catalysts on which industrial nations depend heavily for chemical processing"........

  • Learning from Snowflake chemistry

    Updated: 2009-12-29 14:46:50
    There is more to the snowflake than its ability to delight schoolchildren and snarl traffic. The structure of the frosty flakes also fascinate ice chemists like Purdue University's Travis Knepp, a doctoral candidate in analytical chemistry who studies the basics of snowflake structure to gain more insight into the dynamics of ground-level, or "tropospheric," ozone depletion in the Arctic........

  • memorise all 112 elements of periodic table

    Updated: 2009-12-29 14:46:50
    Is there an easy way to memorise all 112 elements? Yes, there is. You could make up a melody, and sing them. Melody is a great mnemonic device. The idea was used by Carleton... .......

  • Multitasking Micro-rings

    Updated: 2009-12-24 14:00:00
    Arrays of tiny functionalized silicon rings could streamline detection of disease indicators.

  • Electrodes spy serotonin in vivo

    Updated: 2009-12-24 14:00:00
    Measuring the neurotransmitter in vivo has remained an elusive research goal, until now.

  • Older is Better

    Updated: 2009-12-24 14:00:00
    Protein Analysis: Microarray performance is degraded with newer glass slides.

  • Approaches to element 120 (unbinilium)

    Updated: 2009-12-17 20:37:41
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Lead Approaches to element 120 unbinilium Approaches to element 120 unbinilium Attempts have been made at GSI to make element 120 unbinilium Several new elements have been made at GSI in the last few years . However after 120 days no decay chain of element 120 was found . With the total number of 2.6 10 19 projectiles which impinged upon the target , it deduced that the stability in the region around Z=120, N=184 is not exceptionally high with

  • Nanowiring for neurons

    Updated: 2009-12-17 14:00:00
    Gold nanowires electrochemically detect dopamine.

  • How Thiols Photoswitch Cyanine Dyes

    Updated: 2009-12-17 14:00:00
    Mechanism will aid design of dyes for imaging biological systems with super-resolution fluorescence microscopy.

  • WebElements chemistry nexus

    Updated: 2009-12-16 00:21:18
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Periodic Table WebElements chemistry nexus WebElements chemistry nexus 16 December , 2009 12:21 by WebElements OK started reorganisation of one WebElements area , the chemistry nexus The nexus will now bring together news , articles , the WebElements blog , and eventually the Webelements bibliography , and more . It will also contain chemistry content related to WebElements , for instance , sections on the chemistry of the various groups or

  • Depletion of the Ozone Layer in the 21st Century

    Updated: 2009-12-16 00:16:45
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Environmental chemistry Atmospheric chemistry Depletion of the Ozone Layer in the 21st Century Depletion of the Ozone Layer in the 21st Century A paper in Angewandte Chemie suggests that models predict that climate change will lead to an accelerated recovery of the ozone layer . However , reliable predictions are complicated by the ozone-depleting effect of N 2 O . If emissions of this greenhouse gas remain at current levels , by 2050 they

  • Independent Verification of Element 114 (ununquadium)

    Updated: 2009-12-15 09:33:38
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Nuclear chemistry Independent Verification of Element 114 ununquadium Independent Verification of Element 114 ununquadium Workers in the USA verify the production of element 114 in the reaction of 244-MeV 48 Ca with 242 Pu . Two chains of time- and position-correlated decays were assigned to 286 114 and 287 114. The observed decay modes , half-lives , and decay energies agree with the original claims of researchers at the Joint Institute for

  • Silly Find from the Internets

    Updated: 2009-12-15 08:21:00
    Not much today. I saw this earlier and remembered having one of these moments back in G-chem that made me want to break the stupid buret. Actually, that happened on the last day of the semester, during checkout, after I washed it and was walking to the stockroom to return it. I forgot how long [...]

  • Royal Society Digital Journal Archive Free from 23 Nov to 28 Feb 2010

    Updated: 2009-12-15 00:50:58
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Chemical education Royal Society Digital Journal Archive Free from 23 Nov to 28 Feb 2010 Royal Society Digital Journal Archive Free from 23 Nov to 28 Feb 2010 Royal Society Digital Journal Archive Free from 23 Nov to 28 Feb 2010 The year 2010 is going to be a very special year at the Royal Society . As the worlds oldest science academy , we are looking forward to celebrating our 350th anniversary and to mark this special occasion we are making

  • IAEA Analysis of Uranium Supply to 2050

    Updated: 2009-12-14 20:00:43
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry International IAEA Analysis of Uranium Supply to 2050 IAEA Analysis of Uranium Supply to 2050 The IAEA is the world's centre of cooperation in the nuclear field . It was set up as the world's Atoms for Peace organization in 1957 within the United Nations family . The Agency works with its Member States and multiple partners worldwide to promote safe , secure and peaceful nuclear . technologies The IAEA has published Analysis of Uranium Supply

  • Might future fuel cells be nickel based?

    Updated: 2009-12-10 08:59:36
    You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Catalysis Might future fuel cells be nickel based Might future fuel cells be nickel based There seems to be a possibility that nickel compounds might help in the electrolysis of water , the reaction at the centre of hydrogen fuel cells . Researchers at the Joseph Fourier University in Grenoble , and at the French Atomic Energy Commission in Gif-sur-Yvette and attached a nickel compound that mimics hydrogenase enzymes catalysts and attached it

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