Now showing items 61-70 of 400
An evaluation of the rotational barrier about the B---N bond of 1-aminoborepins
(Elsevier, 1994-04-05)
13C NMR spectroscopy has been used to determined the barriers to rotation about the B---N bonds of 1-(N-benzyl-N-methylamino)borepin and 1-(N-benzyl-N-methylamino)-4,5-dihydroborepin as 18 and 19.8 kcal mol-1, respectively. ...
Homogeneous enzyme-linked competitive binding assay for biotin based on the avidin-biotin interaction
(Elsevier, 1988)
A homogeneous enzyme-linked competitive-binding assay for biotin with glucose-6-phosphate dehydrogenase (G6PDH), is described. This assay is based on the interaction between a G6PDH/biotin conjugate with avidin, a natural ...
Critical analysis of the graphical determination of hansen's solubility parameters for lightly crosslinked polymers
(Wiley Subscription Services, Inc., A Wiley Company, 1996-12-19)
The most widely accepted method for determining Hansen's three-dimensional solubility parameters (3DSP) for crosslinked polymers entails graphically estimating the center of a spherical region in 3DSP-coordinate space whose ...
Hydrogen-induced low temperature CO displacement from the Pt(111) surface
(Elsevier, 1990-10-02)
A new low temperature displacement mechanism for CO on the Pt(111) surface has been observed in the presence of high pressures of hydrogen (0.001 to 0.1 Torr H2). Temperature-programmed fluorescence yield near-edge ...
Understanding surfaces and buried interfaces of polymer materials at the molecular level using sum frequency generation vibrational spectroscopy
(John Wiley & Sons, Ltd., 2007-05)
This paper reviews recent progress in the studies on polymer surfaces/interfaces using sum frequency generation (SFG) vibrational spectroscopy. SFG theory, technique, and some experimental details have been presented. The ...
A total synthesis of the naturally occurring pyrrolo[2,3-]pyrimidine nucleoside, mycalisine A
(Elsevier, 1988)
The first total synthesis of mycalisine A, a pyrrolo[2,3-]pyrimidine nucleoside, was accomplished by a multi-step synthesis from toyocamycin.
Excited state spectroscopy of para di-substituted benzenes in a supersonic beam using resonant two photon ionization
(Elsevier, 1986)
Excited state vibronic spectra of p-aminophenol, p-cresol, p-fluoroaniline, p-fluorophenol, hydroquinone and p-toluidine have been obtained using resonant two photon ionization supersonic beam mass spectrometry. Despite ...
Molecular structure of F2POPF2: an electron diffraction study
(Elsevier, 1975-09)
The most important geometric parameters and associated uncertainties (2[sigma]) determined for F2POPF2 are the distances (rg) P-O = 1.631 +/- 0.010 A, P-F = 1.568 +/- 0.004 A, and angles POP = 135.2 +/- 1.8[deg], OPF = ...
Editorial: Day 2-to-40. Proceedings from a Chemical Education Workshop Symposium
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
This issue of The Chemical Educator is devoted to the Proceedings from a workshop symposium that I organized for the weekend of May 10–11, 1997. The two-day event was held in the Willard H. Dow Chemical Sciences laboratory ...