<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><!--StartFragment--><p class="MsoTitle" style="margin-right:-.5in"><span style="font-family:"Times New Roman""><b><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><span class="Apple-tab-span" style="white-space:pre"> </span>Seminar
on</span></font></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1.5pt; "><b><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Modern Optics and Spectroscopy</span></font></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="font-family: Arial; letter-spacing: 1pt; "><b><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Vibrational
analysis of macromolecules and reaction intermediates for the masses: New developments in cryogenic ion
spectroscopy</span></font></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><b><br></b></p><p class="MsoNormal" align="center" style="text-align:center"><b><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Mark Johnson</span></font></b><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">, Yale University</span></font><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></span></p>
<div class="MsoNormal"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"> </span></font><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></span></div><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Tuesday, November 2, 2010</span></font></span><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"> </span></font><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"> 12:00 – 1:00 p.m.<span class="Apple-style-span" style="letter-spacing: normal; color: rgb(0, 0, 128); font-family: Arial; "> </span></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><span class="Apple-style-span" style="letter-spacing: normal; color: rgb(0, 0, 128); font-family: Arial; "> </span></span></font></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-family: Calibri; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">We describe a new instrument in which highly resolved
vibrational spectra are obtained for a wide variety of singly and doubly
charged cations and anions using H</span></font></span><span style="font-family: Calibri; "><sub><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">2</span></font></sub></span><span style="font-family: Calibri; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"> tagging in the single photon regime. The hydrogen is
attached to electrospray-generated ions in a 10K RF quadrupole (Paul) trap
using a pulsed mixture of helium and hydrogen. Spectra are obtained using a
double-focusing time-of-flight photogragmentation mass spectrometer, and are
surveyed over the 600 - 4400 cm</span></font></span><span style="font-family: Calibri; "><sup><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">-1</span></font></sup></span><span style="font-family: Calibri; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">
range. The individual contributions of C=O oscillators in peptide oligomers are
clearly resolved.</span></font></span><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"> </span></font></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Grier Room, MIT Bldg 34-401</span></font><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;"><o:p></o:p></span></font></p><p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">Refreshments served after the lecture</span></font><o:p></o:p></p>
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