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Full-Text Articles in Physical Sciences and Mathematics
Biological, Clinical, And Forensic Analysis Using Comprehensive Two-Dimensional Gas Chromatography, Nicholas Snow
Biological, Clinical, And Forensic Analysis Using Comprehensive Two-Dimensional Gas Chromatography, Nicholas Snow
Nicholas A Snow
No abstract provided.
Modification Of A Capillary For Electrophoresis By Electrostatic Self-Assembly Of An Enzyme For Selective Determination Of The Enzyme Substrate, Stephanie Hooper, Mark Anderson
Modification Of A Capillary For Electrophoresis By Electrostatic Self-Assembly Of An Enzyme For Selective Determination Of The Enzyme Substrate, Stephanie Hooper, Mark Anderson
Mark R. Anderson
The integration of a separation capillary for capillary electrophoresis (CE) with an on-column enzyme reaction for selective determination of the enzyme substrate is described. Enzyme immobilization is achieved by electrostatic assembly of poly(diallydimethylammonium chloride) (PDDA) followed by adsorption of a mixture of the negatively charged enzyme glucose oxidase (GOx) and anionic poly(styrenesulfonate) (PSS). The reaction of glucose with the GOx produces hydrogen peroxide which migrates the length of the capillary and is detected amperometrically at the capillary outlet. The enzyme reaction occurs during a capillary separation, allowing selective determination of the substrate in complex samples without the need for pre- …
Review Of Kitchen Chemistry., Chrystal Bruce
Review Of Kitchen Chemistry., Chrystal Bruce
Chrystal D. Bruce
This book contains many modules emphasizing truly important concepts in chemistry: intermolecular forces, structure, reactivity, solubility. The experiments offered exemplify the recurring phrase, “familiar chemistry in an unfamiliar place.”
Well-Resolved Coherent Raman Spectra From Femtosecond Pulses, Sukhendu Nath, Diana Urbanek, Sean Kern, Mark Berg
Well-Resolved Coherent Raman Spectra From Femtosecond Pulses, Sukhendu Nath, Diana Urbanek, Sean Kern, Mark Berg
Sean J. Kern
This paper demonstrates a method for measuring coherent anti-Stokes Raman spectra with a resolution limited only by the inherent linewidth of the sample, even when using pulses of a width (60 fs, 300 cm−1) that is between the widths needed for a pure frequency- or time-domain measurement. Data are collected as a function of both delay and frequency and used to recover a standard Raman spectrum. The resulting time/frequency detected experiment represents a bridge between standard time- and frequency-domain approaches to spectroscopy.
Simultaneous Time And Frequency Detection In Femtosecond Coherent Raman Spectroscopy, Sukhendu Nath, Diana Urbanek, Sean Kern, Mark Berg
Simultaneous Time And Frequency Detection In Femtosecond Coherent Raman Spectroscopy, Sukhendu Nath, Diana Urbanek, Sean Kern, Mark Berg
Sean J. Kern
The preceding paper showed that, in principle, a high-resolution coherent Raman spectrum can be recovered using femtosecond probe pulses by combined detection in both time and frequency. This measurement is possible even when the pulses are too broad in frequency for conventional frequency-domain spectroscopy and too broad in time for conventional time-domain spectroscopy. In this paper, the method is tested on experimental coherent anti-stokes Raman spectroscopy data from acetonitrile. Compared to theoretical models, experimental data are complicated by noise and incomplete knowledge of the pulse structure. Despite these complications, most of the information in the Raman spectrum is recovered from …
Synthesis Of Homoallyl Ethers Via Allylation Of Acetals And Aldehydes In Ionic Liquids, Ram Mohan, Peter Anzalone
Synthesis Of Homoallyl Ethers Via Allylation Of Acetals And Aldehydes In Ionic Liquids, Ram Mohan, Peter Anzalone
Ram S. Mohan
The TMS triflate catalyzed allylation of acetals to yield homoallyl ethers proceeds smoothly at room temperature in ionic liquids. A one-pot method for the conversion of aldehydes to homoallyl ethers in an ionic liquid has also been developed. This methodology is attractive because it allows allylations to be carried out at room temperature. Ionic liquids offer a convenient replacement for CH2Cl2, the commonly used solvent for such reactions.