Spin-label electron spin resonance (ESR) spectroscopy and auxiliary optical density measurements are used to study lipid dispersions of N-poly(ethylene glycol)-dipalmitoyl phosphatidylethanolamine (PEG:5000-DPPE) mixed with dipalmitoyl phosphatidylcholine (DPPC). PEG:5000-DPPE bears a large hydrophilic polymer headgroup (with approximately 114 oxyethylene monomers) and is commonly used for ster...

The selectivity of interaction between bovine spinal cord myelin basic protein (MBP) and eight different spin-labeled lipid species in complexes with dimyristoylphosphatidylglycerol (DMPG) and between spin-labeled phosphatidylglycerol and spin-labeled phosphatidylcholine in complexes of MBP with various mixtures of DMPG and dimyristoylphosphatidylcholine (DMPC) has been studied by electron spin...

Perfluorinated compounds ~PFCs!, gases which have large global warming potentials, are widely used in plasma processing for etching and chamber cleaning. Due to underutilization of the feedstock gases or by-product generation, the effluents from plasma tools using these gases typically have large mole fractions of PFCs. The use of plasma burn-boxes located downstream of the plasma chamber has b...

We observed Pluto and Triton with the CSHELL echelle spectrograph on the Infrared Telescope Facility in April and July 1996, in an effort to detect the R(2), R(3), and R(4) rotational lines of the 2-0 vibrational transition of gaseous CO. As no lines were detected, we derived 3-σ upper limits on the average widths of these three lines of 0.040 cm−1 for Pluto and 0.028 cm−1 for Triton. The corre...

Diode-laser-based sum-frequency generation of ultraviolet (UV) radiation at 313.5 nm was utilized for high-speed absorption measurements of OH mole fraction and temperature at rates up to 20 kHz. Sensor performance was characterized over a wide range of operating conditions in a 25.4 mm path-length, steady, C2H4-air diffusion flame through comparisons with coherent anti-Stokes Raman spectroscop...

This paper reports a study of the adsorption of four proteins-fibrinogen, lysozyme, pyruvate kinase, and RNAse A-to self-assembled monolayers (SAMs) on gold. The SAMs examined were derived from thiols of the structure HS(CH2)loR, where R was CH3, CHzOH, and oligo(ethy1eneoxide). Monolayers that contained a sufficiently large mole fraction of alkanethiolate groups terminated in oligo(ethy1eneoxi...

Langmuir monolayers of semi-fluorinated nonadecylphosphonic acid (F8H11PO3), hexadecylphosphonic acid (H16PO3), and their mixtures were investigated by Brewster angle microscopy (BAM), atomic force microscopy (AFM) and surface-pressure measurements. Nanometre-scale two-dimensional clusters were observed by AFM in a spread monolayer of pure F8H11PO3 transferred to mica. Two different organized a...

The NAD+-specific isocitrate dehydrogenase from pea stems is shown to respond to the mole fraction of NADH when total NAD (NAD+ plus NADH) is kept constant. Fifty per cent inhibition occurs when the mole fraction of NADH is 0.1. In this region the enzyme is extremely sensitive to NADH concentration and it is suggested that this acts in a similar manner to energy charge in other systems. In an a...

The mixed micellization of adiphenine hydrochloride (ADP) with 1-decyl-3-methylimidazolium chloride (C10mim.Cl), was investigated at different mole fractions and temperatures by surface tension measurements. The synergistic behavior (i.e., non-ideal behavior) for binary mixtures was explained by the deviation of critical micelle concentration (cmc) from ideal critical micelle concentration (cmc...