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The

Periodic News Online

THE WESTERN CAROLINAS SECTION
AMERICAN CHEMICAL SOCIETY

Tuesday September 4, 2007

Clemson University
Hendrix Center, Meeting Room A
Clemson, SC

Host: Melanie Cooper

Hydrogen-Powered Fuel Cells: History, Materials, a Clemson connection, and the Future

Stephen Creager
Clemson University


Meeting Schedule

5:30 p.m.      Executive Committee Meeting

6:30 p.m.     Dinner

Buffet includes:
Mixed greens salad which choice of 2 dressings
Fresh cut fruit salad
Grilled marinated chicken breasts
Vegetable lasagna
Honey glazed carrots
Garlic & chive mashed potatoes
White and wheat dinner rolls
Chocolate and butterscotch brownies

Cost: Members: $ 15.00 Students $ 7.00

7:30 p.m.     Lecture

Stephen Creager, Clemson University

Reservations: Reply to Dave Matthews at (864) 656-3089 or email DMATTHE@exchange.clemson.edu. Please give your full name. Deadline for reservations is Friday, August 31st, 2007 at 3:00 PM

Please Honor Your Reservations!


ABSTRACT

Hydrogen-Powered Fuel Cells:
History, Materials, a Clemson connection, and the Future

Hydrogen-powered fuel cells offer the prospect of clean and efficient electrical energy production from hydrogen fuels. They are being aggressively developed as part of a global effort aimed at reducing reliance on fossil fuels and increasing energy usage from renewable sources, with hydrogen as the principal energy carrier. This lecture will present a brief introduction to worldwide energy usage, followed by a brief overview and history of hydrogen fuel cells. This material will be followed by a brief overview of some relevant research from Clemson on new materials for hydrogen fuel cells.


This Month's Speaker

Stephen Creager, Clemson University

Dr. Stephen Creager is Professor of Chemistry and Chairman of the Chemistry Department at Clemson University in Clemson, SC. He earned a B.S. degree in chemistry from Rensselaer Polytechnic Institute in Troy NY, and a Ph.D. degree in analytical chemistry from the University of North Carolina at Chapel Hill. He worked for two years as an NIH postdoctoral fellow at the University of Texas before he accepted his first academic appointment at Indiana University. He has been a member of the Clemson chemistry faculty since 1995. Dr. Creager directs an academic research group focusing on interfacial electron transfer at electrode-solution interfaces, electrochemical biosensors, and especially electrochemistry of new materials for use in advanced batteries and fuel cells. He has taught undergraduate-level analytical chemistry and graduate-level electrochemistry classes since 1990, and he has taught specialized versions of a course in electrochemical science to audiences in private industry and at other universities since 1999. He is a frequent lecturer at universities, national laboratories, and professional scientific meetings, and he is author of over 60 scientific publications and conference proceedings in the area of electrochemical science.


The Western Carolinas Section of the American Chemical Society invites you to make plans to attend the 2007 Southeast Regional Meeting in Greenville, SC, October 24-27. Online abstract submission and meeting registration is now open at the meeting website:

http://www.sermacs2007.org/

The meeting will feature an outstanding technical program, as well as a variety of educational, cultural and recreational events. There are special programs for all aspects of the ACS membership, including industrial and government scientists, educators, and students. Please see the website for complete details.


Western Carolinas Meeting and Speaker Itinerary
Fall 2007

Date Speaker Title Host
Site
Tuesday, September 4 Steve Creager Fuel Cells Melanie Cooper
Clemson
Tuesday October 9 Wolfgang Bersch Chemical Analysis of Fire Debris Howard Thomas
Erskine
Monday November 27 Helene Dickel Molecules in Interstellar Space Herman Holt
UNC Asheville

More details will be available soon


CURRENT ELECTED OFFICIALS
OF
WESTERN CAROLINAS SECTION ACS

        2007 CHAIR - MELANIE COOPER

        2007 IMMEDIATE PAST CHAIR - HERMAN HOLT

        2007 CHAIR - ELECT - VICKI AUDIA (to be CHAIR in 2008)

        2005 - 2007 SECRETARY - KEN BARTON

        2007 - 2009 TREASURER - JULIA BRUMAGHIM

        2005 - 2007 COUNCILOR - ROYCE WOOSLEY

        2006 - 2008 COUNCILOR - HENRY RAMSEY

        2005 - 2007 ALTERNATE COUNCILOR - LUCY EUBANKS

        2006 - 2008 ALTERNATE COUNCIL - GEORGE HEARD

FUTURE DEADLINES FOR THE PERIODIC NEWS

Deadlines for 2007

Issue
Deadline
October 2007
September 15, 2007
November 2007
October 15, 2007

Please honor these deadlines.
---The Editors

Editor's Note:All requests for address changes should be sent directly to National ACS headquarters in Washington, DC and not to the Editors of The Periodic News. Address labels are supplied to the Editors on a monthly basis by the American Chemical Society and are determined by the current active membership. The Editors cannot be held responsible for incorrect mailing labels.


IMPORTANT NOTICE!

Bylaws Revision Approved

March 4, 2004

After several years of negotiating with the ACS Committee on Constitution and Bylaws, our Local Section has finally won their approval for new bylaws. On February 19, 2004, during our regular meeting, the revisions as proposed were approved by the members present. The revised bylaws were certified on 4 March, 2004.

Approved Bylaws in MS Word

Approved Bylaws in Adobe Acrobat


THE SECTION NEEDS YOUR HELP!!!

The Western Carolinas Section of the American Chemical Society urgently needs the help of each of its members in helping us recruit new Section Affiliate members. We would like to request that each member print out or copy the following invitation and present it to as many persons as possible who have an interest in chemistry:

AN INVITATION

Adobe Acrobat format
MS Word Windows format


The Chair's Corner.........
Section Bylaws
Officers and Committees
High School Chemistry Olympiad Page

Local Middle Schooler Wins Second Prize in Haiku Contest.

Kameron Williams, who was a student in Mrs. Margaret Dacko's 8th grade class at Sever Middle School, Greenville, SC won second prize in the ACS Earth Day Illustrated Haiku contest in the 5th to 8th grade category. Kameron received a prize from Amazon.com, and a certificate. His teacher Mrs. Dacko received a periodic table of the elephants! As the ACS letter to Mrs. Dacko states "Science literacy is very important to our student's and our country's future. The contributions and support of teachers like (Mrs. Dacko) make a significant difference."

Here's the announcement from ACS Headquarters:

    The Committee on Community Activities (CCA) and the Office of Community Activities (OCA) are pleased to announce that the list of Chemists Celebrate Earth Day (CCED) illustrated haiku winners found at:

    http://www.chemistry.org/portal/a/c/s/1/acsdisplay.html?DOC=oca%5cearthday%5ccced_past_celebrations.html

    now links to a page with photos of the entries and the haiku text:

    http://www.chemistry.org/portal/a/c/s/1/acsdisplay.html?DOC=oca%5cearthday%5chaikus06.html .

    Congratulations again to our 2006 winners!

    We would also like you to know that there will again be an illustrated haiku contest for CCED 2007, and the information is attached. Please note that the decision was made to shift the contest deadlines and to change selection of the winners so that they may be announced on or before April 22, 2007.

    We all think that this will be a major plus for publicity and for the participants. They will now know if they received an award within a month or so of their area-contest deadline.

    Thank you for your participation in and interest for OCA programs!

    We hope to hear from you again in 2007!

    Regards,

    Michael Mautino, Chair CCA
    Judith Jankowski, Marisa Burgener and Tiffany Williams, OCA


    American Chemical Society
    1155 Sixteenth Street, NW
    Washington, DC 20036
    earthday@acs.org
    Toll Free 1-800-227-5558
    http://chemistry.org/oca

Click for Acrobat file for information on the 2007 Haiku contest.


Local Section Activities Committee (LSAC)

Mission Statement

LSAC will work with local sections to enhance their success, to promote the well-being of their members, to foster the spirit of volunteerism, and to carry out the mission of the American Chemical Society at the professional and community level.

Vision Statement

The Local Section Activities Committee will continue to focus on ACS members at the local section level so that local sections will

      * Access tailored ACS services delivered by various means that include transitioning toward electronic delivery via the Internet
      * Effectively partner with Divisions and other units
      * Increase member participation in local section events and programs
      * Be infused with leaders having acquired leadership skills for developing sustainable activities and programs that foster member volunteerism and ensure value and satisfaction
      * Receive customized feedback and recognition that focuses on the development of each local section to realize its full unique potential
      * Clearly identify and value the Local Section Activities Committee as a key peer resource

Guiding Principles/Core Values:

      * ACS's strength lies in its local sections and divisions
      * Local Sections are our customers
      * LSAC will be a peer resource to local sections
      * LSAC will emphasize direct input and dialog with sections
      * LSAC is responsible to be the point of contact with other ACS entities on behalf of local sections

For more information, see the ACS Office of Local Section Activities home page on the ACS Web or address correspondence to:

American Chemical Society, Office of Local Section Activities, 1155 16th St, NW, Washington, DC 20036; (202) 872-4610; (202) 872-435; E-mail: olsa@acs.org


ACS Launches Social Networking Site

In late 2006, the American Chemical Society launched a new social networking site targeted to professionals, students, and researchers interested in and working in biotechnology.

BiotechExchange.org provides individuals the opportunity to meet, dialogue, discuss, debate, and interact with other researchers and professionals involved in discovery and process development for the pharmaceutical and bio-based materials industries. BiotechExchange.org provides a forum to share information, identify opportunities, and seek collaborations with fellow scientists and industry professionals.

Features on the site include:

      * Pre-meeting information from event organizers
      * On-site blogs from event attendees
      * Virtual poster sessions (including peer-review)
      * Audio casts, news feeds, and journal article summaries

In addition, the site will permit the creation of special interest groups. These enable smaller collections of individuals to gather and share specialized information of interest. More information regarding the creation of groups may be found at www.biotechexchange.org.


New Online Safety Publication Announced

¡Ahora en español! Spanish Edition of "Safety in Academic Chemistry Laboratories"

The ACS Committee on Chemical Safety (CCS) is pleased to announce the publication (online) of the translation of the top seller of all ACS safety publications, (http://membership.acs.org/c/ccs/pubs/SACL_Spanish.htm).

CCS has as its prime responsibility the encouragement of safe practices in chemical activities. The committee serves as a resource to the chemical professional in providing advice and counsel on the handling of chemicals, and seeks to ensure safe facilities, designs, and operations by calling attention to potential hazards and stimulating education in safe chemical practices. CCS also provides advice to other ACS units on matters related to chemical safety and health.


Where Have the Chemistry Sets Gone?

R.W. Von Korff

(Reprinted with permission of R. Von Korff and Ann Birch, Editor, The Midland Chemist Local Section Newsletter)

Chemical Heritage has published several articles on chemistry sets and how they fit into the legacy of chemistry.1-4 From these articles, two phases are evident in the history of these chemistry teaching tools. In the 1930s–1950s, chemistry sets played an important role in stimulating young people to become chemists or to at least become familiar with chemicals. They provided small wooden or glass containers with solid chemicals as seen in the cover illustration of Chemical Heritage, Spring 2001. The physical form of an element or compound, whether solid or liquid, crystalline or amorphous, and the color were evident. However, from the 1980s on, a different picture emerges, with dilute solutions replacing the vivid materials of years past. Schmidt suggests that ?Liability concerns have forced most of what is ?dangerous? out of the sets, no doubt also forcing out some of their mystery and appeal.?1 Sacks? initial sentence, ?There has been an increasing restriction on the availability of many chemicals in the past 40 years,?2 is followed by the citation of the Columbine High School incident as an example of how easily obtained chemicals can be deadly when misused.

With these thoughts in mind, I?d like to illustrate how important an exciting chemistry set was in initiating my research career, and reflect a bit on chemistry sets as they are used today.

My first chemistry set was obtained at the age of 11 in Portland, Oregon, while the family was touring the west. It led to my desire and determination, encouraged by my Dad, to become a chemist. The picture shown below, taken 5 years later, is of my first lab in what had been the sewing room of my grandmother?s home. By this time, I was taking a correspondence course in chemistry. The texts are shown in the upper right of the photo and the chemicals on the shelves to the left. (My experiences in obtaining chemicals from the drug store were nearly identical to those given by Sacks, Linus Pauling as cited by Sacks, and Talkin3.) The experiment in progress involved the preparation of ethyl ether from alcohol (denatured, I?m sure). The source of heat was an open flame fed from a portable acetylene tank; cooling of the distillate was via gravity-fed ice water—definitely a dangerous way to do this experiment as an explosion could have resulted!

In my late teens I was fortunate in having a much larger lab built by my Dad with a fume hood, Kipp generator, analytical balance, gas and water connections, etc. I worked methodically through the chemistry of as many elements as possible using Treadwell and Hall?s text on qualitative analysis as my guide.

In the late 1940s my thesis research at the University of Minnesota required trapping of C13O2 and N15H3. I frequently transported a five-gallon container of several gallons of liquid nitrogen about six blocks by bicycle to the university lab for my experiments. In various analytical and synthesis projects during my career I worked with perchloric acid in the determination of silicon in iron, perchloric–nitric acid mixtures for wet ashing of agricultural products, or blood to determine silicon from silane-coated plastic tubing used in heart perfusions in the early days of heart surgeries. Similarly, I used diazomethane for methylation, and phosgene and liquid ammonia for various syntheses, all accomplished without problems. In later years I was amazed that some of my biochemist friends refused to have perchloric acid in the lab or were fearful of using diazomethane. I learned that proper planning and care would prevent disasters.

Some 15 years later, while on a National Heart Institute post-doctorate under David E. Green5 I was able to break several log jams holding up the publication of a couple of important papers. One involved a coenzyme Green thought to be to be different than Coenzyme A (CoA) while others in the field were sure it was CoA. As he left for vacation, Green assigned me the task of comparing two analytical procedures, one that required what he termed Co-reductase and the other a classical method for the determination of CoA. When he returned from vacation he looked at the data, which showed identical results for the two assays on the same samples. This resulted in a boost to my reputation for the year.

A couple of months later we made a surprising discovery of how Coenzyme A could be isolated in large amounts by a relatively simple process. However, the manuscript could not be released because of the appearance of glutamic acid and glycine, not components of CoA. It was found, by questioning the analysts, that they were using an acid hydrolysis prior to microbiological analysis. This resulted in the release of glutamic acid and glycine, the latter from decomposition of the adenine moiety of CoA and the former from glutathione, an agent used in the isolation of CoA. This finding allowed release of the manuscript6 for publication. Later I was involved in the removal of another log jam that involved an answer to the mechanism by which acetate ion is converted to a high energy form (acetyl CoA) for further utilization. Much of the approach that I took to these and other problems can be attributed to those early days in my home lab.

Experiments with chemistry sets in the 1980s were a disappointment to me and failed to interest my oldest grandson in chemistry. (A Harvard graduate, he is now a graduate student with a major in math and physics at the University of California, Berkeley.) To perform an experiment one withdrew a few drops of dilute chemical solution by means of a plastic pipette bulb and added it to a test tube or beaker with other constituents—not exciting or particularly educational. My first reaction was to write letters to the ACS and to the manufacturers of the sets. However, living 700 miles away from my grandchildren and procrastination overcame my first reaction. But reading about the experiences of others as described in Chemical Heritage rekindled my interest in recounting my own experiences.

It is interesting to speculate on the factors that may be responsible for the decline in the availability and usefulness of chemistry sets. They are probably numerous, including an increase in fear of chemicals due to misuse of tremendous quantities of certain chemicals e.g., ammonium nitrate; fears promoted by increased publicity of environmentally toxic chemicals; changes in the nature of chemical research and teaching methods; and exponential growth in the availability of computers, leading to some attempts at the use of virtual labs employing computer software experiments. One such case I explored was very misleading in regard to safety aspects. Also, experimentation online is a bit like reading hundreds of pages from a good book on a computer screen instead of turning pages by hand in an easy chair'not nearly as rewarding!

I owe an undying debt of gratitude to my wife Jane whom I lost to an amelanotic melanoma after 47 years of marriage. Her everlasting support and encouragement was a priceless gift of love.

1. James Schmidt, "The Chemistry Set: Chemistry's Legacy of the Home Laboratory," Chemical Heritage, Spring 2001, p. 12.
2. Oliver Sacks, "Hard Times for Curious Minds," Chemical Heritage, Spring 2001, p. 27.
3. Phillip S. Talkin, "A Nostalgia Cocktail," Chemical Heritage, Fall 2001, p. 22.
4. Rosie DiVernieri, "The Chemistry Set: From Toy to Icon," Chemical Heritage, Spring 2006, p. 22.
5. Institute for Enzyme Research, University of Wisconsin, Madison, WI.
6. Helmut Beinert, R.W. Von Korff, D. E. Green, D.A. Buyaske, R.E. Handschumacher, Harvey Higgins, and F.M Strong, "A Method for the Purification of Coenzyme A from Yeast," J. Biol. Chem., 200, 385. (1953).

Editor's Note: Dick has been a member of the American Chemical Society since 1939 and has had a rich and varied career. He obtained his Ph.D. in 1951 from the University of Minnesota and began working with Dr. Lewis Thomas. After six months, he went to the University of Wisconsin at Madison on a National Institute of Health fellowship, working with Dr. David Green, a famous enzymologist. In six months they made three important discoveries involving CoA and fatty acid oxidation. After a year, Dick returned to the University of Minnesota as an associate professor in biochemistry, working again with Dr. Thomas. According to Dick, Dr. Thomas was not only a great medical research investigator, he was also the author of a number of well-read books and was a frequent contributor to the New Yorker magazine. After Dr. Thomas left, Dick worked with Dr. Robert Good, who did the first human bone marrow transplant, then with Dr. John Anderson, head of pediatrics in the medical school. In 1966, he moved to Maryland to become director of biochemical research, initially for Friends of Psychiatric Research, Inc., and then for the state of Maryland's new Maryland Psychiatric Research Center in Catonsville, Maryland. In 1977 he came to Midland as a research professor in biochemistry at what is now the Michigan Molecular Institute, retiring in 1985 at the age of 68.


Planning for Graduate Work in Chemistry: A Resource for the Students Considering Advanced Study.

www.chemistry.org/education/cpt/graduatework

The ACS Committee on Professional Training (CPT) has revised its printed brochure, Planning for Graduate Work in Chemistry. Now in its 8th edition, this publication has been transformed into an interactive website with updated content and format that allow rapid navigation through suggestions on how to plan for graduate school. This online resource is designed to guide both domestic and international undergraduate students who are considering graduate work in chemical sciences in selecting a program that best meets their needs and aspirations. It provides advice on how to prepare for successful work in graduate school, how and when to apply for admission, and to some extent, what to expect once enrolled in graduate school. The online format provides an opportunity for more regular revisions, so CPT would like to hear comments from both students and their advisers on the content, functionality, and ease of use of this new resource.

To submit comments or to get more information about this online publication, please contact Marta Gmurczyk at m_gmurczyk@acs.org or 202-872-4599.


SciFinder® Provides Drug and Biotech Researchers Efficient Access to Information on Biotransformations

Chemical Abstracts Service (CAS) is addressing the growing interest in biology-based synthesis by making access to information on enzymatic reactions and other biotransformations easy to find through its SciFinder research tool. A new audience of researchers eager to go beyond traditional synthetic processes has found a wealth of information in the literature and patent records in CAS databases. CAS has demonstrated SciFinder and its biotech applications during recent American Chemical Society national meetings and found substantial interest among researchers in the biotech and pharmaceutical industries.

"CAS has processed decades worth of journal literature and patents containing information on biotransformations--reactions mediated by biological species-- including enzymatic reactions, which our scientists have been analyzing and adding to CAS databases," said CAS Vice President, Editorial Operations, Matthew J. Toussant. "An explosion of interest in using enzymes to synthesize substances more efficiently has made CAS databases and search tools such as SciFinder useful in many hot research areas of industrial biotech."

CAS reaction information extends back to 1840 and among the 11 million reaction records are thousands for biotransformations. Applying such biotransformations to industrial processes can improve cost efficiency and environmental safety, via greener methods. In addition CAS literature databases reference a wealth of research on biological processes relating to drugs, food, materials and energy, among other applications.

Just as yeast has been used since ancient times to induce fermentation for making beer, biological entities and enzymes play a role in many chemical reactions. Applying such biotransformations to industrial processes can improve cost efficiency and environmental safety. For example, biologically important chemicals can exist in two molecular forms that are mirror images of each other, with a right-hand and left-hand version. But only one version (or stereoisomer) may be valuable for the intended purposes (medicinal, specialty chemical and others), and isolating it may be difficult and costly using classical organic synthesis. However, a biological entity may produce an enzyme that is naturally selective for the desired molecule. Using such enzymes in biocatalysis can produce high purity substances in the desired quantities. SciFinder can easily lead scientists to information on these innovative chemical processes.

CAS has continuously enhanced SciFinder since its inception and SciFinder 2007 introduces a slate of new options and features to add additional power to the exploration of CAS' extensive information resources. These improvements will allow users to:

Combine answer sets for substances, reactions and references – users will be able to combine a saved answer set with an 'active' set of answers in SciFinder, to arrive at a focused set of answers; for example, references for a given research topic can be combined with the results of a saved author search; options to 'combine', 'intersect' or 'remove' answer sets allow the user to include only the desired references from the saved and active sets;

Export commercial chemical records from CHEMCATS® into Excel - users can move catalog information for commercially available chemicals into spreadsheets for sorting and manipulation.

More information about these and other new features of SciFinder can be found on the CAS web site at http://www.cas.org.


The ACS Member-Get-A-Member Campaign Rolls On!

You have until December 31, 2006 to get your 2006 Periodic Table of the Elements throw and/or Professor Molennium Pillow. Make sure your membership information is included on the official MGM application when your nominee submits their paid membership application to the Society to ensure delivery of your gift(s).

And starting January 1, 2007 a new Periodic Table of the Elements Throw will be available to all current ACS members who nominate an eligible new member.

As an added bonus, at year's end, the ACS member who recruits the most new members in 2007 will win a trip in 2008 to an American Chemical Society National Meeting. You will receive:

      * roundtrip airfare (for one)
      * hotel for five nights
      * free registration

Just pick your meeting destination -- New Orleans, LA (April) or Philadelphia, PA (August)

For all the details and to download an official MGM application, go to chemistry.org/membership/mgm.html.


ChemShorts for Kids: Leafy Chromatography

An archive of all previously published ChemShorts is available online at http://membership.acs.org/C/Chicago/home.html.

Since 1992 Dr. Kathleen A. Carrado, a member of the Chicago Local Section and a chemist at Argonne National Laboratory, has submitted a regular column titled "ChemShorts" for the section's newsletter, The Chemical Bulletin. Each ChemShort describes a simple and interesting chemistry experiment that a young student (grades K-6) can do at home with adult supervision and common household items. A selected ChemShorts for Kids will be featured in future Cut & Paste publications.

Kids, did you ever wonder about the chemistry of autumn leaf colors? Most plants contain several pigment molecules. If you experiment with different leaves in this activity you will see the wide range of pigments.

You will need leaves, baby food jars with lids, rubbing alcohol, coffee filters (preferably the Melitta type), hot water, and a shallow pan. Take 2-3 large leaves (or the equivalent with smaller leaves), tear them into tiny pieces, and place them into small jars with lids. Add enough alcohol to just cover the leaves. Loosely cover the jars and set them into a shallow pan containing an inch or so of hot tap water. Let the jars sit in the hot water for at least a half hour. Replace the hot water as it cools and swirl the jars from time to time. The jars are 'done' when the alcohol has picked up color from the leaves. The darker the color, the brighter the chromatogram will be. Cut a long, thin (1/2?) strip of coffee filter paper for each jar. Place one strip of paper into each jar, with one end in the alcohol and the other outside of the jar. As the alcohol evaporates, it will pull the pigment up the paper, separating pigments according to their molecular size. Pigments with the largest size will move the shortest distance. After 30-90 minutes, remove the strips of paper and allow them to dry. From the information below, can you identify which pigments are present?

The color of a leaf results from the different pigments produced by the plant. The main pigment classes responsible for leaf color are porphyrins, carotenoids, and flavonoids. The color depends mostly on the amount and types of these pigments. The pigment porphyrin has a compound called chlorophyll that is green. The pigment carotenoid has compounds carotene and lycopene that are yellow, orange , and red, as well as xanthophyll which is yellow. The pigment flavonoid has compounds flavone and flavonol ( yellow ) and anthocyanin that can be red, blue , purple , or magenta.

When leaves are green, it is because they contain a lot of chlorophyll. Chlorophyll masks all other pigment colors. The anthocyanins will mask carotenoids. As summer turns to autumn, decreasing light levels cause chlorophyll production to slow and the green color will fade. At the same time, anthocyanin production in leaves increases in response to increasing sugar concentrations. Leaves with a lot of anthocyanins will turn red. Leaves with good amounts of both anthocyanins and carotenoids will be orange, and leaves with carotenoids but little or no anthocyanins will turn yellow. In the absence of these pigments, other plant chemicals can affect leaf color. An example is tannins, which cause the brownish color of some oak leaves.

Options: Does the season in which the leaves are picked affect their colors? Also try using frozen chopped spinach leaves. If your chromatogram is pale, the next time use more leaves and/or smaller pieces.
-------------
Reference:

Dr. Anne Marie Helmenstine at
http://chemistry.about.com/cs/howtos/ht/paperchroma.htm
and
http://chemistry.about.com/library/weekly/aa082602a.htm


National Chemistry Week (NCW)

2007 is the 20th anniversary of the NCW program, so planning for the celebration will begin even earlier than usual. The theme is "The Many Faces of Chemistry" and it will be celebrated October 21-27, 2007.

Each ACS local section and division has been encouraged to highlight and celebrate their own 'faces' of chemistry. Please consider how this might happen within the Western Carolinas Section.

National Chemistry Week (NCW), a community-based outreach program, is designed to reach the public with positive messages about chemistry and to make a positive change in the public's impression of chemistry. Activities include chemical demonstrations, hands-on activities, lectures, open houses, displays, contests and games.

For more information on the NCW program visit chemistry.org/ncw.


Local Section Needs Community Outreach Volunteer

The Western Carolinas Section is looking for community outreach coordinators to lead community activities such as Chemists Celebrate Earth Day (CCED) and National Chemistry Week (NCW). If you are interested in heading up one of these outreach programs, contact the local section chair [insert contact information] and sign up with the ACS Office of Community Activities at:

http://fs12.formsite.com/ACS-OCA/IntenttoParticipate/index.html

For additional information on these or other community activity programs available through ACS, visit the Office of Community Activities' website at chemistry.org/oca, or email oca@acs.org.


STARTING WITH SAFETY NOW AVAILABLE ONLINE

The highly popular ACS Video Course, Starting with Safety, has been adapted for delivery via the Internet. The Internet version includes all of the materials from the original Video Course including the video scenes and the Teacher's Guide. As an added bonus, the complete ACS Video Course, Seeing the Light, Eye and Face Protection, is also included in this ACS Internet Course.

Now you and your students can access this valuable training program from any computer connected to the Internet at any time, day or night. (We do recommend a relatively high-speed connection, such as a DSL, cable modem or higher. And you will need to install the Flash 6 player to view the videos).

This program is designed to be used as part of a standard high school or introductory college chemistry curriculum that is taught by an experienced chemistry teacher. The program is NOT meant to be a stand-alone training course. Students should only use this program under the supervision of a qualified teacher.

For complete details about this program, visit the American Chemical Society website at http://chemistry.org/elearning and click on the link to Starting with Safety.


Local Section Officers Newsletter Launched!

In October, the Technology, Tools and Operations Subcommittee of the Local Section Activities Committee and the Office of Local Section Activities launched a new HTML newsletter for local section leaders! The quarterly newsletter is sent via email to all current local section officers. The goal of the newsletter is to provide officers with timely information, tools and tips for success, and innovative ideas and activities that local sections may find of interest. The newsletter is available online at http://membership.acs.org/l/localsections/leading_together. If you wish to subscribe to future issues of this newsletter please send an email to olsa@acs.org and indicate your subscription request.


Chemistry Links

Chemical Abstracts Service
Chemistry News Groups
Internet Chemistry Resources (Gary Wiggins)
ACS Local Sections
Go to the ACSWeb 


Last Updated Thursday, August 23, 2007

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