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March Newsletter Available
Posted by nfackler on Friday, March 05 @ 14:47:44 CST (134 reads)
The March Newsletter is now available here.
(comments? | Score: 0)


Coming soon!!
Posted by nfackler on Wednesday, February 03 @ 14:04:39 CST (159 reads)
March Speaker (See the March 2010 Newsletter for more detail)

When: Monday, March 15, 2010

“Chemistry of Coffee ”

Venue: 548 Hamilton Hall, University of Nebraska-Lincoln Campus

Time: 6:30 pm
The seminar will present a brief history of coffee, the physical process from cherry to brewed coffee and espressos. The final product of the harvest is the green "bean", which has a characteristic odor (green coffee beans will be passed around during the presentation). The roasting of the beans is dominated by the Maillard reaction and Strecker degradation. Some of the compounds that have been identified as important flavor and aroma compounds are β-damascenone (cooked apple), 2-furfurylthiol (the dominant "coffee" smell of freshly brewed coffee),  2-isobutyl-3-methoxypyrazine (earthy), guaiacol (spicy), 2,3-butanedione (artificial butter), and 4-hydroxy-2,5-dimethyl-3(2H)-furanone (caramel). The stage at which roasting is stopped has traditionally been done by color (after roasting test batches). The whole roasting process takes place 8-12 minutes, followed by rapid cooling to slow further reactions. Coffee roasted by the speaker (in his office!) will be sampled. All coffee drinkers know that leaving coffee on a burner rapidly ruins the brew. This chemistry will be discussed, as will "staling" - the degradation of roasted coffee by exposure to air.The final part of the talk will be a discussion of the health issues surrounding coffee. The compounds cafestol and kahweol can raise cholesterol slightly, but are absorbed by paper filters.


Biographical Sketch: Tracy P. Hamilton is the Associate Professor in Department of Chemistry at University of Alabama. He received his B.S. Degree from the University of Arkansas at Little Rock in 1980. After two years of graduate study and one year in a consulting laboratory, he worked with Peter Pulay in quantum chemistry at the University of Arkansas in Fayetteville, obtaining his Ph.D. in 1987. He then enjoyed a four-year stint doing further research in quantum chemistry with Henry F. Schaefer III at the University of Georgia. Dr. Hamilton joined the Department of Chemistry at UAB in 1991. Dr. Hamilton is also a member of the Center for Free Radical Biology. Dr. Hamilton’s research involves the development of theoretical methods to study chemical systems by quantum mechanics, with an emphasis on techniques for studying larger molecules. His research also includes the application of these methods to chemical systems. Dr. Hamilton did not drink coffee until after he obtained a faculty position at UAB. He expanded his personal interest in home made beverages to include coffee roasting in 2006.

For questions, please contact the host: James Takacs, jtakacs1@unl.edu (402) 472-3634


(comments? | Score: 0)


Past News: October-November Newsletter
Posted by nfackler on Monday, November 02 @ 13:55:52 CST (214 reads)
The October-November Newsletter is now available here.
(comments? | Past News | Score: 0)


Past News: November Speaker
Posted by nfackler on Monday, November 02 @ 13:52:43 CST (186 reads)
Environmental Forensics and Analytical Atomic Spectroscopy

Speaker: Dr. Ramon Barnes
When: Tuesday, November 10, 2009
Venue: Ockinga Conference Center, UNK Campus

Time: 6:00 pm social, 6:30 pm dinner (Italian buffet-style), 7:00 pm talk

Cost: $8 for ACS Members/ $12 for Non-members/ $4 for students (RSVP November 4)

Environmental forensics is a new subject area relating to courtroom or litigation proceedings and the fact basis for mediated or negotiated transactions involving environmental matters. Environmental forensic investigations often deal with historical release of contaminants and attempt to establish who caused the contamination, when and how the contamination occurred, how extensive the contamination was, what levels of contamination exposure existed, and how valid the test results were. Plasma spectrochemical analysis has been applied to a large variety of environmental and forensic materials to identify and quantify their elemental concentrations, isotopic compositions, and metal compound forms. Specifically, inductively coupled plasma (ICP) atomic emission (ICP-AES) and mass spectrometry (ICP-MS) provide powerful elemental analysis tools for air monitoring, biota analysis, soil and sediment analysis, radionuclide determinations, and water and ecological monitoring. The features of plasma spectrochemistry will be described, and ICP analyses of environmental and forensic materials will be reviewed with emphasis on chemometric data interpretation for source identification. The unique applications of laser ablation (LA-ICP-MS) for microsamples and especially crime scene samples will be demonstrated. Elemental speciation with combined separation and ICP-MS tools also will be introduced.


Biographical Sketch
Ramon Barnes is director of the University Research Institute for Analytical Chemistry, Professor Emeritus of Chemistry at the University of Massachusetts, editor of the ICP Information Newsletter (1975-), and chairman of the Winter Conference on Plasma Spectrochemistry (1980-). He received a Ph.D. in  analytical chemistry from the University of Illinois, Champaign/Urbana, in 1966, an A.M. in chemistry from Columbia University, New York, in 1963, and was a post doctoral research fellow at Iowa State University, Ames, in 1968 and 1969. He served as an Army Captain at NASA Lewis Research Center, Cleveland, from 1966 to 1968. From 1969 to 2000 he taught analytical chemistry and maintained an international research program at the University of Massachusetts, Amherst. He has published more than 300 papers, edited four books, and continues an active research interest in fundamentals and applications of inductively coupled plasma (ICP) discharges for spectrochemical analysis.

For questions and RSVP (by November 4), contact:

Mike Mosher, mosherm@unk.edu (308) 865-8385 or

Scott Darveau, darveausa@unk.edu (308) 865-8491.

(comments? | Past News | Score: 0)


Past News: Molecules to Mozzarella: The Chemistry of Cheese
Posted by nfackler on Monday, September 28 @ 12:33:21 CDT (222 reads)
Title: Molecules to Mozzarella: The Chemistry of Cheese

Monday, October 12, 2009

Venue: Valentinos at 35th and Holdredge in Lincoln, NE (hosted by NWU Chem Department)

Time: Gather downstairs at Valentino's at 5:30 pm, the presentation will begin around 5:45.  Drinks should be available at this time.

Dinner: Enjoy the full buffet for only $1 for students and $5 for ACS members!  The buffet (and general discussion) will follow the presentation.


Coagulation of milk, removal of whey, and ripening are all required when making cheese, and chemistry is involved every step of the way. This non-technical talk describes the procedure from raw milk to final product, and illustrates the differences between cheese types, including the development of the many flavors in cheese.


Biographical Sketch: Michael H. Tunick received a B.S. in Chemistry from Drexel University in 1977. He was astudent trainee at the Eastern Regional Research Center of the U.S. Department ofAgriculture in Wyndmoor, PA, and was hired as a chemist upon graduation. He performed research on treatment of tannery waste with the Hides and Leather Laboratory until 1983, when he was transferred to what is now the Dairy Processing & Products Research Unit. He pursued a Ph.D. in Physical-Analytical Chemistry on a part-time basis during this period, receiving the degree from Temple University in 1985. He also became a research chemist in that year and was involved in a number of projects, including detection of mislabeled cheese and development of low-fat Mozzarella for the National School Lunch Program. He currently relates the effects of processing to changes in composition, texture, and microstructure of cheese and extruded whey proteins. He is the Secretary and a Past Chair of the ACS Division of Agricultural and Food Chemistry, and is Councilor and Past President of the Thermal Analysis Forum of Delaware Valley.

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Past News: September Newsletter
Posted by nfackler on Monday, September 28 @ 12:22:09 CDT (219 reads)
The September Newsletter is now available here.
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Past News: September Speaker: Judith Giordan
Posted by nfackler on Friday, September 11 @ 14:11:20 CDT (241 reads)
“Know Yourself – A self-assessment on how you behave and how it impacts others”


Friday, September 18, 2009

Venue: 152 Lied Math and Science Building, Doane College

Time: 5:45 pm refreshments, 6:00 pm talk

See the latest Newsletter for driving directions.

This interactive workshop will ask important questions such as: Are you a Driver, an Expressive, an Amiable or an Analytical? What behavior style do you prefer? Do you tend to be more people or task oriented? More tell or ask assertive? What do you do when backed into a corner? While there’s no right or wrong to these questions, in today’s team based work environment, if you know how you come across and can assess how others prefer to interact, you and the team have a higher chance of achieving your goals. Find out about yourself and how to maximize your interactions with others to help ensure personal and project success!

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Past News: August Newsletter
Posted by nfackler on Wednesday, August 26 @ 11:27:17 CDT (259 reads)
The August Newsletter is now available here.
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Past News: Updates
Posted by nfackler on Tuesday, July 07 @ 13:25:39 CDT (300 reads)
The latest Newsletter is now available here. My apologies for the late posting
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Past News: Leadership Development Workshop
Posted by nfackler on Tuesday, July 07 @ 13:11:50 CDT (330 reads)
You are encouraged to participate in a Workshop on Fostering Innovation, one of a series of Workshops provided by the ACS.  There is no charge to the first 20 participants!

See the Following Links for more details:

Flyer detailing date, time, and location
Directions to Doane College  
(Read More... | Past News | Score: 0)


  
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