• Elimination Reactions and Alkyl Halides

    Updated: 2009-08-21 18:39:27
    What is the product when 1-iodo-1,1-dimethylbutane is heated in H2O?a. no reactionb. an alcoholc. an alkened. a mixture of an alcohol and alkeneWill elimination occur, and an alkene will form?I am a bit confused because water is a weak nucleophile. From knowing general synthesis reactions, a base and heat added to an alky halide will form an alkene while an acid and heat added to an alcohol will form an alkene.Thank you.

  • Re: Problem with zinc determination

    Updated: 2009-08-21 18:14:46
    Thanky Marquise for that info. I had previously perused the USP and saw that they used ''ashing' process which was a bit out of my range of capability as we have many organic solvents and no muffle furnace. But the approach is similar chemically, and I appreciate your advice on how the interference from hydrocarbons would be alleviated after combustion. I will aim to implement it and compare with my observations. Thanky Marquise

  • Re: Preparation of Cl2 (exam question)

    Updated: 2009-08-21 18:06:49
    Alright, thanks for the help.Exam's over, so you can just close/delete the thread.

  • Re: Conversion factor question

    Updated: 2009-08-21 17:49:51
    can you post how you are doing the problem so we can see where it is you are going wrong?

  • Conversion factor question

    Updated: 2009-08-21 17:42:09
    This seems like a pretty basic question and I've tried to do it a thousand times and keep getting the strangest answers that just... make no sense. So I was hoping someone would be able to explain to me how to do it. It seems simple enough but I guess I am missing some very basic principle behind it. It was a homework problem I faced this week and a quiz question later, so I think my teacher is particularly fond of it and I should understand how to do it for future tests.Mercury poisoning is a debilitating disease that is often fatal. If the amount of mercury in a polluted lake is 0.4 micrograms Hg/mL. What is the total mass in kilograms of mercury in the lake? (The lake has a suurface area of 100mi2 and an average depth of 20 ft)Simple right? I cannot understand why my answers do not seem to work.

  • Witnessing transition at a crystal/liquid interface

    Updated: 2009-08-20 15:00:00
    Microscope could make spectral imaging more accessible.

  • SCODA for DNA extraction from challenging samples

    Updated: 2009-08-20 15:00:00
    Microscope could make spectral imaging more accessible.

  • The Periodic Table Of Videos

    Updated: 2009-08-18 14:53:13
    Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one.The Periodic Table Of Videos is an experiment by Professor Martyn Poliakoff of the University of Nottingham, UK.

  • Extreme makeover chemistry style

    Updated: 2009-08-18 14:53:13
    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: 2009-08-18 14:53:13
    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........

  • Leaving the Lab

    Updated: 2009-08-18 07:15:39
    After 3+ years of manual labour (not counting undergrad studies) it is time to leave the hood and write up the thesis. I must say, it’s been a very good time, with good colleagues in the lab and also some reasonable results. I now have about two weeks left to finish the stuff that I’m [...]

  • O Level Chemistry Questions: Acids, Bases & Salts

    Updated: 2009-08-18 01:45:48
    Acids, Bases & Salts are very important chapter in GCE O Levels Chemistry (IB Chemistry and IP Chemistry). In fact, there are considered heavy-weightage topics (in terms of marks as well as content) that are related to many other chemistry topics. Many students lost their interest in Chemistry as early as Sec 3 / Year 3 [...]

  • Wolfram|Alpha as a resource for chemistry basics

    Updated: 2009-08-17 20:52:49
    In honor of the ACS national meeting in DC, the WolframAlpha blog featured how to use their engine for chemistry. I won’t steal all their thunder so link is below. Link: Wolfram|Alpha Chemistry 101 Mitch

  • Major ChemFeeds Upgrade

    Updated: 2009-08-17 07:10:18
    I added a crowdsourcing component to ChemFeeds that allows users to vote-up chemistry papers they enjoy. For those uninitiated to ChemFeeds, the website displays the latest graphical abstracts from ACS, RSC, and Wiley. As all things involving crowdsourcing and chemists are unpopular, I doubt it’ll be used much. But enjoy anyways. The upgrade of [...]

  • O Levels Organic Chemistry: Common Conceptual Mistakes by Students

    Updated: 2009-08-15 01:00:43
    During the Organic Chemistry Mastery Workshop 2009 in July, we noticed several misconceptions by students that surfaced again for this current batch of GCE O Levels students, just like the previous years’ batches. Just a quick note on 2 common errors (mentioned in Up Your Chemistry Grades Now) that you would need to be aware of, [...]

  • How ethical are organic chemists?

    Updated: 2009-08-13 22:21:36
    In a recent commentary in the Journal of Organic Chemistry the editor-in-chief, C. Dale Poulter, frets about the shenanigans of some authors.[JOC] In 2008, 15 manuscripts were deactivated because the authors were unable to provide original copies of reports for high-resolution mass spectra or combustion analyses. By June of 2009, 13 of these manuscripts had been [...]

  • SERS enters the art scene

    Updated: 2009-08-13 15:00:00
    Microscope could make spectral imaging more accessible.

  • Microfluidic device performs 1024 click-chemistry reactions in parallel

    Updated: 2009-08-13 15:00:00
    Microscope could make spectral imaging more accessible.

  • Kinase activity assay gets microfluidic platform

    Updated: 2009-08-13 15:00:00
    Microscope could make spectral imaging more accessible.

  • Molecule counting made easy

    Updated: 2009-08-13 15:00:00
    Microscope could make spectral imaging more accessible.

  • Finding the Training You Need Shouldn't Be Hard

    Updated: 2009-08-11 19:30:00
    The ACS Office of Professional Education has dramatically revamped its website and registration system, so you can find the courses you're looking for in no time. Bookmark this link today: http://www.proed.acs.org. You can now search our short courses, webcast courses, and ProSpectives Conferences by topic area, date, or location, and even browse our full instructor list. We are continuously investing in new course development, so if you don't see what you're looking for, just drop us a line at shortcourses@acs.org, and we'll do our best to serve your technical training needs.

  • FEATURE: ACS Now More Than Ever

    Updated: 2009-08-11 19:30:00
    Terms of Use Security Privacy Copyright 2009 American Chemical Society

  • Successful Completion: O Level Organic Chemistry Mastery Workshop 2009

    Updated: 2009-08-11 16:50:53
    Just a quick note for those that are following us closely and would like to find out how their friends / relatives / students are doing in our weekly coaching classes (Ultimate Leap Programme) as well as Topical Mastery Workshops. We have just successfully completed the annual O Levels Organic Chemistry Mastery Workshops 2009 where a [...]

  • “Coaching the Not-So-Interested” at Association of Professional Trainers

    Updated: 2009-08-09 18:00:39
    From my previous blogpost, you would have realised that i have presented my talk on “Coaching the Not-So-Interested” to a group of professional trainers/speakers by now. It was an awesome event where i get to know professional trainers / speakers from all walks of life, each a master in their own field / industry. We share [...]

  • A CLASSY method for the analysis of NMR spectral data

    Updated: 2009-08-06 15:00:00
    This Toolbox item describes an algorithm, database, or computational method for proteomics analyses.

  • A simple grating-based instrument for spectral microscopy

    Updated: 2009-08-06 15:00:00
    Microscope could make spectral imaging more accessible. <img src="http://feeds.feedburner.com/~ff/AnalyticalChemistryA-pages?d=yIl2AUoC8zA" border="0"

  • 2009–2010 DAC Graduate Fellowship Awards

    Updated: 2009-07-30 15:00:00
    DAC Graduate Fellowship Committee selects analytical chemistry graduate students for fellowships

  • MAYU estimates false discovery rates for protein IDs in large data sets

    Updated: 2009-07-30 15:00:00
    A new method determines the reliabilities of protein IDs.

  • MRM verification assays for candidate cardiac biomarkers

    Updated: 2009-07-30 15:00:00
    MRM assays hold promise as alternatives to immunoassays for biomarker verification.

  • A proteome-wide technology for absolute quantification

    Updated: 2009-07-23 15:00:00
    The new MS-based strategy measures the absolute number of protein copies in genetically unmodified cells.

  • The mercury mystery of South America

    Updated: 2009-07-23 15:00:00
    Mercury sulfide, known as cinnabar, was mined in the Peruvian Andes as far back as 1400 BC, causing major atmospheric mercury pollution. <img src="http://feeds.feedburner.com/~r/AnalyticalChemistryA-pages/~4/b2ADIMChGxM" height="1" width="1"/

  • NEMS papers spark debate about MS

    Updated: 2009-07-23 15:00:00
    If a nanofabricated device can measure the masses of individual molecules and atoms, is it a mass spectrometer?

  • Dynamic exclusion optimized for low-abundance proteins

    Updated: 2009-07-23 15:00:00
    Technique should aid spectral-count-based quantitative proteomics.

  • Invited as Professional Guest Speaker @ Association of Professional Trainers Singapore (APTSG)

    Updated: 2009-07-22 16:41:50
    Hi reader, I have received many emails from you asking me to share more about myself, beside the consistent sharing of Chemistry Tips, Phenomenons and Exam Strategies in this blog. Thank you for wanting to know more about me and my personal life besides Chemistry Coaching. I love sports (Soccer, Basketball, Long Distance Running, etc) and anything [...]

  • O Levels Chemistry Exams Revision - How to Revise Quickly & Effectively ?

    Updated: 2009-07-21 05:45:10
    For Singapore-based O Levels’ students (both Pure Chemistry and Combine Science Chemistry), you will be taking your GCE ‘O’ Levels Chemistry Examinations in approximately 3 months time, for both Paper 1(Multiple Choice Questions, MCQ) & Paper 2 (Written Exam on Chemistry Theory) . (Picture adapted from David Scarlett) With your school’s Preliminary Examinations (2 weeks - 1 month [...]

  • O Levels Organic Chemistry Mastery Workshop 2009 - 1 More Day

    Updated: 2009-07-17 07:48:24
    Last year in O Levels Organic Chemistry Mastery Workshop 2008, we had lots of fun and students were taught all the essential concepts on EVERYTHING on O Levels Organic Chemistry. Those concepts allow them to tackle and answer all the Organic Chemistry related questions in both their Preliminary and GCE O Level Chemistry Examinations. With flow [...]

  • A faster way to process samples in sexual assault cases

    Updated: 2009-07-16 15:00:00
    Acoustic differential extraction on a microfluidic platform simplifies and speeds up the sample preparation for forensic cases.

  • Element 112 (Uub) to become Copernicium, Cp

    Updated: 2009-07-15 08:40:48
    In honour of scientist and astronomer Nicolaus Copernicus (1473-1543), the discovering team around Professor Sigurd Hofmann suggested the name copernicium with the element symbol Cp for the new element 112, discovered at the GSI Helmholtzzentrum für Schwerionenforschung (Center for Heavy Ion Research) in Darmstadt. It was Copernicus who discovered that the Earth orbits the Sun, thus paving the way for our modern view of the world. Thirteen years ago, element 112 was discovered by an international team of scientists at the GSI accelerator facility. A few weeks ago, the International Union of Pure and Applied Chemistry, IUPAC, officially confirmed their discovery. In around six months, IUPAC will officially endorse the new element's name. This period is set to allow the scientific community to discuss the suggested name copernicium before the IUPAC naming. read more

  • Invited as Guest Speaker @ 2009 Motivation Forum for O Levels Graduating Classes

    Updated: 2009-07-15 03:13:55
    I am honoured to be invited by my former teacher to be one of the guest speaker at alma mater for 2009 Motivation Forum for O Levels Graduating Classes. In fact, this will be the 3rd time that i will be going back to share my experiences and thoughts on approaching their important qualifying exams in [...]

  • O Levels Chemistry 2008 Exam Question: Organic Chemistry in Paper 1 (MCQs)-Cont’d

    Updated: 2009-07-14 15:41:45
    In the previous blgopost we have discussed on 3 MCQ questions on Organic Chemistry that came out in 2008 GCE O Levels Chemistry Exams. Let’s continue with the rest of the MCQ questions that are related to Organic Chemistry. Question 1: under sub-topic “Carboxylic Acids” The reaction between a carboxylic acid, CxHyCO2H, and an alcohol, CnH2n+1OH, produces an [...]

  • O Levels Chemistry 2008 Exam Question: Organic Chemistry in Paper 1 (MCQs)

    Updated: 2009-07-12 07:46:26
    Hi Students (and parents), Thank you for all your email enquries on our annual Organic Chemistry Mastery Workshops 2009 for O Level students. As mentioned that in 2008 GCE O Levels Chemistry Exams, Organic Chemistry plays a large part of the questions that came out in Paper 1 (Multiple Choice Questions) and 2 (Written). Today i am going [...]

  • Going where the imagination goes

    Updated: 2009-07-09 15:00:00
    Creative thinking has guided Mitch Zakin’s career from conducting experiments at the dining room table to managing chemistry programs at the Defense Advanced Research Projects Agency.

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