BEGIN:VCALENDAR
METHOD:PUBLISH
CALSCALE:GREGORIAN
PRODID:-//EVDB//www.eventful.com//EN
VERSION:2.0
X-WR-CALNAME:Fast Scanning Calorimetry Studies of Amorphous Solid Wate
	r in Washington DC at The George Washington University - Eventful
BEGIN:VEVENT
DTSTART:20081205T160000
DTEND:20081205T170000
DTSTAMP:20081208T013328Z
SUMMARY:Fast Scanning Calorimetry Studies of Amorphous Solid Water
DESCRIPTION: By: Chemistry\, Department of\n  Cost: Free Location: Cor
	coran 101 The fast scanning calorimetry (FSC) apparatus was employed t
	o investigate glass transition phenomena in vapor deposited amorphous 
	solid water (ASW) films doped with acetic acid\, pentanol\, and carbon
	 tetrachloride. In all three cases\, FSC thermograms of doped ASW film
	s show well pronounced glass transitions at temperatures near 177 K. S
	ystematic FSC measurements of the glass transition temperature and the
	 excess heat capacity dependence on the concentration of impurities in
	dicate the possible existence of two distinct non-crystalline phases o
	f H2O in binary aqueous solutions. According to our conjecture\, bulk 
	pure ASW is a glass at temperatures up to its crystallization at tempe
	ratures near 205 K. However\, a guest molecule in the ASW matrix may b
	e enveloped in ultraviscous liquid water at temperatures as low as 136
	 K. In the case of CH3COOH\, we estimate that such a viscous shell con
	tains approximately 25 H2O molecules. This seminar will discuss the im
	plications of these findings for past studies of molecular kinetics in
	 pure vitreous water and in binary aqueous solutions. \n
LOCATION:The George Washington University @ 2121 Eye Street, Washingto
	n, District of Columbia 20052 United States
SEQUENCE:1228700008
UID:E0-001-015661056-3
URL:http://eventful.com/E0-001-015661056-3
END:VEVENT
END:VCALENDAR