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Topic Area: Biological Physics
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Displaying records 11 to 18.
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11. Conformational Effects on Excitonic Interactions in a Prototypical H-bonded Bichromophore: Bis(2-hydroxyphenyl)methane
Topic: Biological Physics
Published: 4/30/2009
Authors: David F Plusquellic, Nathan Pillsbury, Christian Mueller, Timothy Zwier
Abstract: Laser induced fluorescence (LIF), single vibronic level fluorescence, UV holeburning, and fluorescence-dip infrared (FDIR) spectroscopy have been carried out on bis-(2-hydroxyphenyl)methane (2HDPM) in order to characterize the ground and first excite ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901215

12. Pb(II) Adsorption on Isostructural Hydrated Alumina and Hematite (0001) Sur faces: A DFT Study
Topic: Biological Physics
Published: 1/20/2009
Authors: Sara E. Mason, Christopher R. Iceman, Kunaljeet Tanwar, Thomas P. Trainor, Anne Marie Chaka
Abstract: The persistence of lead (Pb) in contaminated topsoil is ranked as one of the most serious environmental issues in the U.S. and other countries. Adsorption of Pb at the aqueous interface of nanoscale metal oxide and metal (oxy)hydroxide particles is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842585

13. Terahertz Spectra and Normal Mode Analysis of the Crystalline VA Class Dipeptide Nanotubes
Topic: Biological Physics
Published: 12/31/2008
Authors: David F Plusquellic, Weimin Zhang, Karen M. Siegrist, Susan K. Gregurick
Abstract: Terahertz (THz) spectra of the crystalline VA class dipeptide nanotubes were calculated at both the harmonic and Vibrational Self-consistent Field (VSCF) level using the CHARMM22 force field with periodic boundary conditions. Comparison of the calcul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842523

14. Terahertz spectroscopy of aqueous L-Proline in reverse micelles
Topic: Biological Physics
Published: 11/21/2008
Authors: Catherine C Cooksey, Edwin J Heilweil, Benjamin Greer
Abstract: A new method for obtaining room temperature terahertz (THz) absorption spectra of aqueous-phase biomolecules in the frequency range 1 THz to 21 THz (35 cm-1 to 700 cm-1) is reported. The spectrum for L-Proline was acquired by solvating the amino ac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842526

15. THz Investigations of Condensed Phase Biomolecular Systems
Topic: Biological Physics
Published: 10/8/2008
Authors: Kevin O Douglass, Hailiang Zhang, Susan K. Gregurick, Karen M. Siegrist, David F Plusquellic
Abstract: Terahertz (THz) spectroscopic investigations of crystalline dipeptide nanotubes are discussed in the frequency region from 0.6 THz (2 cm-1) to 3 THz (100 cm-1). The THz region provides access to collective modes of biomolecular systems and is theref ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842603

16. Cholesterol/Phospholipid Interactions in Hybrid Bilayer Membranes
Topic: Biological Physics
Published: 5/25/2007
Authors: Dustin Levy, Kimberly A Briggman
Abstract: The interactions between cholesterol and saturated phospholipids in hybrid bilayer membranes (HBMs) were investigated using the interface-sensitive technique of vibrational sum frequency spectroscopy (VSFS). The unique sensitivity of VSFS to order/di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841051

17. Characterization and Control of Lipid Layer Fluidity in Hybrid Bilayer Membranes
Topic: Biological Physics
Published: 1/31/2007
Authors: Neil A. Anderson, Lee J Richter, John C. Stephenson, Kimberly A Briggman
Abstract: The main gel-to-liquid-crystal (LC) phase transition temperature, Tm, of the distal lipid layer in hybrid bilayer membranes (HBMs) under water was investigated using vibrational sum frequency spectroscopy (VSFS). VSFS has unique sensitivity to order ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100963

18. Determination of Lipid Phase Transition Temperatures in Hybrid Bilayer Membranes
Topic: Biological Physics
Published: 9/9/2006
Authors: Neil A. Anderson, Lee J Richter, John C. Stephenson, Kimberly A Briggman
Abstract: The main gel to liquid crystal (LC) phase transition temperature, Tm, of the lipid monolayers in hybrid bilayer membranes (HBMs) was investigated using vibrational sum frequency spectroscopy (VSFS). The unique sensitivity of VSFS to probe order/diso ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841012



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