Just Chromatography Just Chromatography Chromatography and Analytical Chemistry - from history and basic principles to the latest research news. Articles
Forensic Application of Gas Chromatography
2007-08-24 21:02:00 Gas Chromatography (GC) is one of the primary analytical techniques used in every CSI laboratory. More About: Application , Fore , Graph , Forensic
Heat Flow through Hydrocarbon Chains
2007-08-09 20:00:00 Researchers understand heat transfer on the scales of individual molecules and in solids, but there is still much to learn about the physics of heat transfer in just a few molecules that will be used in nanometer-scale electronics. Zhaohui Wang and coauthors used a laser pulse to heat a gold substrate onto which a self-assembled monolayer of long-chain hydrocarbon molecules had been formed. More About: Heat , Chain , Chai , Flow , Hain
Nano LC Sensitivity
2007-08-05 23:34:00 In theory, the analyte sensitivity increases on decreasing the column inner diameter. More About: Nano
?Fast? HPLC better than UHPLC
2007-07-31 08:25:00 Research scientists from Schering-Plough Research Institute developed a rapid high-performance liquid chromatography (HPLC) technique that allows for efficient separation and analysis of pharmaceutical compounds. The method uses a short column packed with 2.7?m “fused-core” silica particles that are made by fusing a 0.5?m layer of porous silica onto a solid silica particle[1]. These unique ... More About: Fast
Fishy Chromatography
2007-07-25 20:01:00 Folks from India extracted 99.6% pure eicosapentaenoic acid (EPA) using silver ion (argentation) column chromatography from hydrolyzed sardine oil. The individual fatty acids were determined as fatty acid methyl esters (FAME) by gas-liquid chromatography and gas chromatography-mass spectroscopy as FAME and N-acyl pyrrolidides. More About: Graph
Columns for Gas Chromatography: Performance and Selection
2007-07-23 03:07:00 Choosing the right column is key in Gas Chromatography. “Columns for Gas Chromatography: Performance and Sele ct ion” is a new hands-on reference for scientists and technicians working with packed column and capillary column gas chromatography. The authors Eugene F. Barry (University of Massachusetts Lowell) and Robert L. Grob (Villanova University) discuss the development, performance, selection, and ... More About: Graph
Motor Proteins in Nanotechnology
2007-07-19 20:00:00 The biological cell is basically a miniature factory, which contains a large collection of dedicated protein machines. In a Review, Martin van den Heuvel and Cees Dekker look at recent progress in using some of these proteins to move, manipulate or power artificial, nanoscale devices. nano, nanogenerator, nanoscale, protein More About: Nanotechnology , Motor , Ology , Prot , Nanotech
The Little Botanists
2007-07-19 02:24:00 135th BirthdayHappy Birthday Professor Tsvet!Chromatogram on the ceilingColorgramFrom Switzerland to RussiaThe Litt le Botanists I am continuing the series dedicated to the chromatography?s founder Mikhail Tsvet. So, in 1897 he moves to Russia from Switzerland, and here is his first impression of Russia: “…during the first six months that I have been in Russia, in vain, I ...
Unanswered Questions
2007-07-16 17:41:00 Today I studied my blog’s statistics to see what keywords people use to search in Google and Yahoo! to get to the pages of my site. Here is what I found based on the last 60 days of statistics: People used 1966 various search terms The top 20 keywords are: Top 20 Term Perc chromatography 20.04% witricity 3.76% response factor 3.15% wireless power transfer via strongly coupled ... More About: Questions
Polymer Solar Cells Build for Two
2007-07-12 20:00:00 Researchers have developed a new method for producing tandem solar cells, in which two solar cells working together to use a wider range of the solar spectrum. The physical properties of the semiconductor materials in each cell allow one to absorb light at longer wavelengths and the other to absorb light at shorter wavelengths. Researchers ... More About: Solar , Build , Solar cell , Poly , Solar cells
Asparagusic Acid, Anyone?
2007-07-10 20:22:00 Thank God for Greg’s post “Odeur d’Asperge” over at Carbon Tet! The mystery is solved, and I thought my kidneys were failing and I would have to spend the rest of my life on dialysis. This spring I had become an avid admirer of the young asparagus shoots. And practically everyday for breakfast I had ... More About: Acid , Spar
Nanogenerators Powered By Heartbeat
2007-07-07 19:07:00 Scientists from Georgian Institute of Technology created a prototype nanogenerator that can generate electricity inside a human body. Tiny little devices traveling in our bloodstream while performing complete blood analysis and monitoring our well-being is the future of implantable biosensors. However, these nanorobots will need to be self-powered and there are two ways for ... More About: Generators
High Reactivity at Very Low Temperatures
2007-07-05 20:00:00 New research examines a class of reactions between neutral free radicals and neutral molecules that, unlike most reactions, happen rapidly at very low temperatures. Chemical reactions generally accelerate when temperature increase. However, in today’s issue of Science Magazine [1] a research group from France revealed a class of gas-phase reaction between oxygen atoms and alkenes ... More About: High , Ratu , React , Temp
Cocaine Pollution
2007-07-02 22:10:00 Cocaine is presently the most abused substance in Americas; however, the stimulant is gaining new advocates at an alarming rate in western Europe as well. In 2005, a group of researches from Italy analyzed water samples from the Po River in northern Italy for the presence of cocaine and its main urinary metabolite - benzoylecgonine ... More About: Pollution , Cocaine , Caine
Columns in Nano LC
2007-06-27 22:22:00 Nano Liquid ChromatographyNano Liquid Chromatography - ReloadedDefinition of Nano Liquid ChromatographyColumns in Nano LC As I mentioned in the last post from this series, capillary columns of 10–100 μm inner diameter are commonly used in nano-liquid chromatography setups. They are typically made either from fused silica or PEEK materials currently found in your everyday Gas ... More About: Nano
Carbon Nanoscrolls to Store Hydrogen
2007-06-24 22:02:00 As our planet is running out of petroleum resources, a new energy source must be found. Hydrogen is regarded as an ideal alternative to fossil fuel because of its abundance in environment, renewability, and zero emission. However, the most challenging and important aspect for the successful transition to a hydrogen economy is the ... More About: Freedom , Store , Carbon , Drogen
Translational vs Vibrational
2007-06-21 20:00:00 Has anyone seen today’s issue of Science? There is a research paper by Shannon Yan and colleagues “Do Vibration al Excitations of CHD3 Preferentially Promote Reactivity Toward the Chlorine Atom?” I had a difficult time following the authors - physical-molecular chemistry is not my strongest field, but nevertheless … The study shows the energy of the ... More About: Brat , Translation , Tran
What is the response factor in chromatography?
2007-06-21 14:10:00 “What is the response factor in chromatography?” is a question on Yahoo Answers. So far there has been two answers: 1) A wordy and a bit confusing text book reply tailored more towards Gas Chromatography. Response Factor The size of a spectral peak is proportional to the amount of the substance that reaches the detector in the ... More About: Graph , Actor
HPLC for Pharmaceutical Scientists
2007-06-20 17:37:00 “HPLC for Pharmaceutical Scientists ” is a new hardcover book edited by Yuri V. Kazakevich and Rosario LoBrutto with a price tag of $159 at Amazon. This is an excellent book for both novice and experienced pharmaceutical chemists that provides a unified approach to HPLC with a balanced treatment of the theory and practice of ... More About: Harm , Mace , Arma
Chinese Meds Are Safe
2007-06-18 15:00:00 Well, the prescription ones at least. With Chinese manufacturers considering to increase exports of drug ingredients and perhaps even begin shipping finished drug products to the United States, an article “Trusting medicine from China: Close FDA scrutiny of Chinese pharmaceutical ingredients extends only to those for prescription drugs” in Chemical & Engineering News ... More About: Safe , Meds
Definition of Nano Liquid Chromatography
2007-06-18 06:09:00 Series: Nano Liquid ChromatographyNano Liquid Chromatography - ReloadedDefinition of Nano Liquid Chromatography It is interesting to note that 20 years later there is still no clear definition of nano-LC. Due to a relatively large size of the columns used in nano-HPLC (10-140 ?m), the method does not fall within the realm of the conventional definition ... More About: Graph
Nano Liquid Chromatography - Reloaded
2007-06-17 21:08:00 Series: Nano Liquid ChromatographyNano Liquid Chromatography - ReloadedDefinition of Nano Liquid Chromatography Thanks to one of the readers of this blog - Farooq, I now have the full text of an excellent, 21-page review by the researches from Rome and Spain entitled “Recent applications in nanoliquid chromatography” (DOI 10.1002/jssc.200700061). Two months ago, I did a small ... More About: Graph , Loaded
From Switzerland to Russia
2007-06-15 06:01:00 Series: 135th BirthdayHappy Birthday Professor Tsvet!Chromatogram on the ceilingColorgramFrom Switzerland to Russia This is the next post from the series dedicated to 135th birthday anniversary of Prof. Tsvet, the chromatography’s founder. Today, the application of the principle of a chromatographic substance separation is the foundation of many breakthroughs in science and technology. The analysis of the ... More About: Witz
Toxic Waste Eating Bacteria
2007-06-14 20:00:00 New research on sulfate-reducing bacteria may offer good news for bioremediation efforts to clean up acid mine drainages and other environments with high levels of harmful metals. Sulfate-reducing bacteria is known to extract metal dissolved in anoxic waters and by isolating it into nanoscale particles. But, the tiny size of these particles (2-6 ... More About: Bacteria , Waste , Teri , Eating , Toxic
Plastic that grows in the field
2007-06-14 19:59:00 A chromium catalyst is the key to efficiently converting glucose to a chemical feedstock with potential to replace many uses of crude oil including pharmaceuticals, cosmetics and plastics, scientists from Pacific Northwest National Laboratory report. As the world tries to emancipate itself from its oil addiction, researchers are seeking a clean, efficient and cost ... More About: Plastic , Field , Grow , E field
Organic Oxygen
2007-06-12 14:29:00 A simple, cheap treatment using just oxygen could allow organic produce growers to store their crops for longer and go a long way towards reducing the price of organic fruit and vegetables. I admit that I am into organic produce but mostly because it tastes better and fresher than the conventionally grown fruits and vegetables ... More About: Organic , Oxygen , Organ
Non-Radiative Wireless Power - WiTricity
2007-06-07 19:59:00 A month ago I wrote a post “World Without Wires” about the unique material developed by Japanese scientists that can transmit electrical energy to nearby devices without the need for direct contact. Now in today’s issue of Science magazine, an MIT research team led by Prof. Marin Soljacic reported its version of the ... More About: Power , Wireless , Tricity , Less , Itri
Corundum on Rails
2007-06-06 23:14:00 Ruby is a relatively rare, red colored gemstone and a variety of corundum (Al2O3) with traces of hexavalent chromium that’s responsible for ruby’s rich red color. The best, dark colored rubies are from West Mogok, Myanmar (Mandalay Division). However, that’s not ruby that I would like to write about. Today I’ve embarked on a new ... More About: Rails
Touchy Silicon
2007-06-04 17:55:00 The first systematic study of a new group of explosives has concluded that the materials are so shock sensitive ? apt to detonate if struck or heated ? that the legendarily touchy nitroglycerin seems a pillar of stability by comparison. Conducted by Thomas M. Klapötke and colleagues in Germany. More About: Ouch , Silicon
Traditional Chinese Meds on GC/MS
More articles from this author:2007-06-03 02:18:00 A few years back during my 3 month trip to China I remember noticing enormous number of pharmacies that sold traditional Chinese medicine. Everywhere I went in China they looked more or less the same just like an old-fashion pharmacy of the 1920s here in the West with its wooden drawers and cabinets full ... More About: Meds , Traditional 1, 2, 3 |
|
 |
|
 |
