Place of work: Laboratory of Experimental Plant Cytology Arboretumlaan 4‚ 6703 BD WAGENINGEN The Netherlands * H. Van As Wageningen NMR Centre and Lab of Molecular Physics Dreijenlaan 3‚ 6703 HA WAGENINGEN The Netherlands • Requested support - Variable field machine (Maran). Period of measurements: 10 days - NMR imager. Period of measurements: 10 days • Length of fellowship one months • Project description 1. Introduction Mature pollen of different
Premium Pollen
mixture of a neutral (ester‚ alcohol‚ ketone‚ aldehyde or ether) and an acidic compound (phenol or carboxylic acid) or a neutral and a basic compound (amine)‚ and to identify the unknown mixture by physical (M.P. or B.P.) and spectroscopic methods (NMR‚ IR and MS). Method The mixture (sample number: 27) was dissolved in 200 mL of CH2Cl2 and then extracted with 10% NaOH. The acid was removed by adding 3 x 50 mL of 10% NaOH. The neutral component in CH2Cl2 solution was set aside. The NaOH extracts
Premium Chemistry Molecule Chemical compound
of chemically active extraction‚ vacuum filtration‚ simple distillation‚ and recrystallization. Then identifying information was compiled about these unknowns by obtaining experimental melting/boiling point ranges‚ and analyzing IR and proton/carbon NMR spectrums It was determined that the unknown solid’s identity was m-nitrobenzoic acid and the unknown liquid’s identity was 4‚4-dimethyl-2-pentanone. The calculated percent recovery for the purified crystals was 20.75% INTRODUCTION: 2 The goal of this
Premium Distillation Nuclear magnetic resonance
Abstract Chemically active extraction was used to separate two unknown compounds from each other and to determine what compound class each compound belongs. The solid unknown was purified by recrystallization and its melting point range was determined to be 109-111°C. The liquid unknown was purified by simple distillation and its boiling point was determined to be 95°C. An IR spectrum was collected for each of the purified compounds; the solid was determined to be 3-toluic acid and the liquid was
Premium Nuclear magnetic resonance
in Boston by Edward Mills Purcell and in Stanford by Felix Bloch. Nuclear magnetic resonance was sometimes called nuclear induction or paramagnetic nuclear resonance. It is generally abbreviated to NMR. So as not to scare prospective patients in medicine‚ reference to the "nuclear" character of NMR is dropped and the magnetic resonance based imaging systems (scanner) found in hospitals are simply referred to as "magnetic resonance imaging" (MRI). 4.1 The Nuclear Resonance Effect Many
Premium Nuclear magnetic resonance
Report’s Newmont that no contamination of the fish or the water was happened. In 2004‚ Newmont Minahasa Raya (NMR) began closing down its operations in North Sulawesi‚ leaving local communities in Buyat Bay and Ratatatok with a dubious legacy. NMR use a submarine tailings disposal (STD) system which a method of waste due to its harmful environmental and health impacts. From 1996 until its closure‚ NMR dumped more than four million tons of mine waste into the bay. Forum the Environment (WALHI) found that
Premium Pollution Newmont Mining Corporation United States
In the13C NMR‚ there were 5 peaks‚ which meant that there were five different non-equivalent carbons. With this information‚ it can be deduced that the compound does not have a methyl group attached to a four-carbon chain because the methyl carbon and the first carbon on the chain would be equivalent. This would result in an 13C NMR with 4 peaks‚ so the compound would need to have a five-carbon chain. With the assumption
Premium Chemistry Oxygen Molecule
this experiment is to efficiently perform a fischer esterification of 1-Hexanol to form water and hexyl acetate‚ and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR‚ IR‚ and boiling point confirmation. Backround: A Fischer Esterification is the formation of an ester and water from alcohol and an acid. More specifically it is a nucleophillic
Free Alcohol Acetic acid Oxygen
graduate courses at the University of Pittsburgh for free where he later received his PhD degree in 1962. During his studies‚ he learned about nuclear magnetic resonance (NMR). Then he was drafted into the Army from 1954-1955 then left to work at the State University of New York at Stony Brook. He realized new images could be made from NMR. Lauterbur’s breakthrough idea was to vary the strength of the magnetic field over the object which in turn emitted various radio waves that could be turned into images
Premium Nobel Prize Nuclear magnetic resonance Magnetic resonance imaging
electronegative‚ therefore it has a higher partial negative charge. This indicates that the reaction with the oxygen nucleophile should occur at a faster rate. The final product is determined by using proton nuclear magnetic resonance (H NMR). Oxygen appears farther downfield on an NMR because of its ability to deshield protons (4.7 ppm). Nitrogen will appear around 3.9 ppm and methlylene protons which
Premium Nuclear magnetic resonance Nucleophile Chemical reaction