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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Nucleobases in Supercritical Fluids

Nucleobases in Supercritical Fluids

Sarfraz, Adnan

Paperback

Chemistry

ISBN10: 3639182375
ISBN13: 9783639182378
Publisher: Blues Kids Of Amer
Published: Aug 26 2010
Pages: 112
Weight: 0.39
Height: 0.27 Width: 6.00 Depth: 9.00
Language: English
Supercritical fluids have found applications in a wide variety of fields, from solvents for reaction media to engineering of nanoparticles. They are also of interest in the analytical field for transferring non-volatile organic molecules into the gas phase for detection and deposition purposes. This book highlights the use of supercritical fluids as an analytical tool for the transfer of a group of non-volatile molecules, namely nucleobases, into the gas phase. Moreover, a new bracketing method is described for detecting the critical point of pure fluids and diluted mixtures of fluids. Five biologically relevant nucleobases i.e. adenine, guanine, cytosine, thymine and uracil were dissolved in supercritical ethylene and detected in the gas phase using molecular beam expansion mass spectrometry. Surface deposition of the nucleobases through rapid expansion of supercritical fluids (RESS) showed remarkable differences while comparing the morphology obtained after deposition using drop casting method. These differences are discussed in terms of diffusion, rate of evaporation of the solvent, degree of supersaturation, and the nucleation process.

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