Friday, March 6, 2009


Currently the United States is in the midst of one of the largest food recalls in American history. As Americans dig through their cabinets and refrigerators to remove potentially contaminated food associated with the recent peanut recall, we would like to also remind citizens to open and check their Emergency Preparedness Kits to remove any potentially harmful items from these also.

Because peanut products are often recommended as staples in Emergency Preparedness Kits due to their long shell life and because they are a good source of protein, we encourage all kit owners to look at their kits to ensure food products are not on the peanut recall list. Please keep in mind that the peanut product recall extends beyond peanut-flavored products. The following are some examples of foods also included in the recall that may contain peanuts:
Snack bars
Trail Mix
Dog treats

A full list of recalled peanut products and what individuals should do with recalled items can be found on the Food and Drug Administration’s Web site,

In addition to checking for peanut-related items, please be sure to check for other items in your kit that may have expired, including medications, food and pet food, water, and other recalled items. The U.S. government provides information on unsafe, hazardous, or defective products ranging from consumer products, food, medicine, and cosmetics at

Ensuring family and neighbors are prepared is an essential step in helping communities during and after an emergency. Families should have an Emergency Preparedness Kit in all locations that are frequented often, including homes, offices, schools, cars and day care facilities. These kits should hold a variety of essential items that are needed during a disaster, such as a flashlight, radio, cash, clothing, protective equipment, medicines, and of course food and water. For a complete list of Emergency Preparedness Kit recommended items, please visit

Citizen Corps Councils and Partners: Councils and partners should remind their communities about the importance of maintaining and constructing an Emergency Preparedness Kit and consider hosting public preparedness training sessions to ensure that information about kits is reaching the community. In addition, Councils and partners should consider adding a link to the FDA Web sites along with information on the recall on peanut products to any Web pages or documents that refer to community preparedness or Emergency Preparedness Kit preparation.

This news story and other Community Preparedness news, including Citizen Corps Bulletins, can be found on our website at


The National Office of Citizen Corps
FEMA Community Preparedness Division

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FEMA · U.S. Department of Homeland Security · Washington, DC 20472 · 1 (800) 621-FEMA (3362)

Information Technology Specialist (INFOSEC), GS-2210-12
Fri, 06 Mar 2009 06:28:36 -0600

MW/DH-09-FA-0087-KJD1 (Closing Date: Fri, 20 Mar 2009 00:00:00 EDT)

News Release

U.S. Environmental Protection Agency

New England Regional Office

For Release: March 6, 2009

Contact: Paula Ballentine (617) 918-1027

(Boston, Mass. – March 6, 2009) – Staples, Inc., based in Framingham, Mass., has recently been recognized by EPA as one of the nations leading organizations taking voluntary steps to use and purchase green power, being named to EPA’s national Top 50 list.

Staples purchases more than 127 million kilowatt-hours (kWh) of green power annually, which is enough green power to meet more than 20 percent of the organization’s purchased electricity use. The company is also a member of the Green Power Leadership Club, a distinction given to organizations that have significantly exceeded EPA’s minimum purchase requirements.

"Staples is honored to be recognized by EPA in their national Green Power Top 50 list," said Mark Buckley, vice president of environmental affairs, Staples, Inc. "Using renewable power is a key part of Staples’ company-wide commitment to sustainable business practices."

EPA’s Green Power Partnership is a voluntary program helping to increase the use of green power among U.S. organizations. There are currently hundreds of partners utilizing green power to reduce the environmental impacts from conventional electricity generation, including Fortune 500 companies, local, state and federal governments, trade associations as well as colleges and universities. Each of the award winners are EPA Green Power Partners who must meet or exceed EPA purchase requirements for green power.

The majority of Staples’ green power consists of renewable energy certificates, but they also purchase direct green power through various utility programs. Staples now has twenty-four active solar power systems on distribution centers and retail stores and is investigating future projects involving fuel cells and wind power. Additionally, there are environmentally preferable products and in-store recycling options in its North American stores. An active participant in EPA’s Fortune 500 Green Power Challenge, Staples not only ranks as one of the largest purchasers and Green Power on the National Top 50 list, but also ranks among the Top 10 Retail list of green power purchasers, serving as a great example for other businesses to follow.

Staples’ green power purchase of more than 127 million kilowatt-hours (kWh) is equivalent to avoiding the carbon dioxide (CO2) emissions of more than 16,000 passenger vehicles per year, or is the equivalent amount of electricity needed to power 12,000 average American homes every year.

More information:

EPA's Green Power Partnership (

The nation’s Top 50 Partners in 2009 (

EPA information on energy and New England’s environment (

Connecticut Tips on protecting our environment (

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Sent by the U.S. Environmental Protection Agency · 1200 Pennsylvania Avenue NW · Washington DC 20460 · 202-564-4355News Release

U.S. Environmental Protection Agency

New England Regional Office

For Release: March 5, 2009

Contact Information: Paula Ballentine (617) 918-1027

(Boston, Mass. – March 5, 2009) – EPA has begun the first five-year review of the remedial actions previously implemented at the former Nutmeg Valley Road Superfund Site, in west-central Connecticut near the Wolcott/Waterbury town line since its removal from the National Priorities List (NPL) in 2005. Five-year reviews are mandated under the Comprehensive Environmental Response, Compensation and Liability Act (commonly known as "Superfund").

The Site remains eligible for remedial actions in the unlikely event that conditions at the site change and warrant such action in the future. This five-year review will be limited in scope to evaluating whether legal mechanisms that serve to prevent human exposure to contaminated groundwater and that were in place at the time the remedy was selected in 2004 remain in place, and, whether these mechanisms continue to function sufficiently to prevent human exposure to contaminated groundwater. Should this review indicate that exposure is occurring, EPA may take additional action to determine if such exposure presents an unacceptable risk to public health and the environment.

The Nutmeg Valley Road Site consists of a dozen small manufacturing facilities, light industrial facilities and repair shops over a 28-acre area in the southern section of Wolcott, along the border with Waterbury. Private wells contaminated with volatile organic compounds were first discovered by state and local health officials in 1979. In 1986, the Town of Wolcott extended a public water supply line into the area.

EPA placed the Site on the NPL in March 1989. Early investigations focused on two machine shops on Nutmeg Valley Road with a known history of dumping waste oil and solvents onto the ground. The study area was expanded to 155 acres to include similar companies on Swiss Lane, Tosun Road, Wolcott Road and Town Line Road which were also seen as potential sources of groundwater contamination.

In 1992, EPA removed 1,150 tons of sludge waste and contaminated soil from two unlined lagoons on Tosun Road. This action addressed the threats posed by the electroplating wastes in surface soils, and removed a potential source of groundwater contamination.

Based on further studies completed by EPA and the U.S. Geological Survey from 1995 through 2002, EPA concluded that although some contaminants were detected in groundwater, there was no evidence of a wide-spread plume of contamination and levels of contaminants in much of the study area were decreasing over time through natural degradation processes. As a result, the study area was reduced in size to its current 28 acres. EPA has determined that existing state law and a local ordinance adopted in 2004 prohibiting the use of groundwater in the remaining area of groundwater contamination, when considered together, will ensure that human exposure is prevented.

EPA will be conducting one-on-one interviews with local officials and property owners in April 2009. If you would like to schedule a meeting with EPA, please contact Karen Lumino, the Remedial Project Manager, at 617-918-1348. Alternatively, you may direct comments or thoughts on the remedy via email to EPA will be collecting comments through May 2009.

For more information, please visit:

Nutmeg Valley Road Site (!OpenDocument)

Superfund in New England (

Note: If a link above doesn't work, please copy and paste the URL into a browser.

View all Region 1 News Releases

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Sent by the U.S. Environmental Protection Agency · 1200 Pennsylvania Avenue NW · Washington DC 20460 · 202-564-4355

Begin forwarded message:

From: "U.S. EPA"
Date: March 6, 2009 9:53:38 AM EST
Subject: Hazardous Waste News (Region 5): EPA, General Latex sign DOW Legacy site corrective action agreement

CONTACT: Karen Thompson, 312-353-8547,
Rafael Gonzalez, 312-886-0269,

No. 09-OPA027

EPA, General Latex sign DOW Legacy site corrective action agreement

CHICAGO (March 5, 2009) - U.S. Environmental Protection Agency Region 5 has signed a voluntary agreement with General Latex Chemical Co. to investigate and clean up if necessary a 7-acre vacant property at 1526 Cleveland Ave., Ashland, Ohio. General Latex is a subsidiary of Dow Chemical Co., and this location is one of three "legacy sites" in the region where Dow has agreed to investigate and clean up possible contamination.

In what is called a "corrective action" agreement, Dow will investigate, stabilize and clean up historic releases of hazardous waste at the rural site. Latex and polyurethane products were manufactured there from 1954 to 2001. Pollutants of concern include a family of chemicals called volatile organic compounds and semi-volatile organic compounds.

The Ashland agreement requires a full environmental investigation currently underway be completed by Dec. 31. A proposed cleanup plan is due one year later. A site condition report will be submitted to EPA by May 11.

Under the legacy site program, Dow voluntarily identified three locations where hazardous waste was handled and contamination possibly occurred. The three areas were not previously on EPA's list of known regulated places.

Official documents about the General Latex site can be viewed in a file to be set up at the Ashland Public Library. EPA will give the public an opportunity to review and comment on the proposed cleanup plan when it is eventually released.

EPA regulates hazardous waste from production to final disposal under the Resource Conservation Recovery Act.

# # #

Note: If a link above doesn't work, please copy and paste the URL into a browser.

View all Region 5 News Releases

You can view or update your subscriptions or e-mail address at any time on your Subscriber Preferences Page. All you will need is your e-mail address. If you have any questions or problems e-mail for assistance.

This service is provided to you at no charge by U.S. Environmental Protection Agency.

Sent by the U.S. Environmental Protection Agency · 1200 Pennsylvania Avenue NW · Washington DC 20460 · 202-564-4355

Shuttle Launch Date Expected Today
Fri, 06 Mar 2009 09:13:24 -0600

NASA managers are back at the Kennedy Space Center in Florida today, conducting another Flight Readiness Review for space shuttle Discovery's STS-119 mission to the International Space Station. Managers are expected to set a launch date at the conclusion of today's meeting. During the review, the Program Requirements Control Board is expected to recommend a launch date of March 11. While technicians at Kennedy continue preparation for launch countdown, at NASA's Johnson Space Center, shuttle Discovery's crew has been quarantined in preparation for flight.

Subject: Amendment to Two Joint NIEHS/EPA RFAs Posted
Date: March 6, 2009 11:12:58 AM EST

NIEHS has posted an Amendment to two joint NIEHS/EPA RFAs (NOT-ES-09-003)
Revisions and Clarifications to RFA-ES-08-002 and RFA-ES-08-004:

- Children's Environmental Health and Disease Prevention Research
Centers (with NIEHS) - Open: January 21, 2009 - Closing: April 30, 2009
- Children's Environmental Health and Disease Prevention Research
Centers: Formative Centers (with NIEHS) - Open: January 21, 2009 -
Closing: April 30, 2009.

The Amendment adds information about page limitations, and applications with
multiple PDs/PIs to Section IV Application and Submission Information. This
Amendment is viewable at:

Another Amendment modifying these RFAs is expected in the near future. Please
check back with this site for details.

Follow NCER News and New Funding Opportunities on Twitter:

Members of this list are encouraged to use the Web interface at: to unsubscribe to this list or
subscribe to other lists available on NCER.

Begin forwarded message:

Date: March 6, 2009 11:03:34 AM EST
To: "Flo"
Subject: FW: Paid Email from InboxDollars

From: InboxDollars []
Sent: Friday, March 06, 2009 10:02 AM
Subject: Paid Email from InboxDollars

Can't read this E-Mail? Please Click Here.

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Wednesday, March 4, 2009


Department of Environmental Quality

DEQ Seeks Comments on Draft List Of Priority Persistent Pollutants Through March 27, 2009

This list, mandated by 2007 Legislature, identifies pollutants affecting human health, wildlife, aquatic habitat. The DEQ will hold information sessions statewide in March.

As part of the state’s continuing efforts to address toxic pollutants in the environment, the Oregon Department of Environmental Quality has released a draft list of priority persistent pollutants that have a documented affect on human health, wildlife and aquatic habitats. The draft list of pollutants, organized by chemical class as well as by degree of persistency in the environment, is available on DEQ’s Web site at A draft scientific report describing DEQ’s development of the list is available on the Web site as well.

DEQ compiled the list of 175 pollutants with the help of a science workgroup and is holding information sessions throughout the state to get comments on the list. Based on input and other information it receives, DEQ will revise the list over the next several months before finalizing it. It will then present the final list to the Oregon Legislature by June 1, 2009. By June 1, 2010, DEQ will submit to the Legislature a final report identifying sources of pollutants on the list and opportunities to reduce their discharge to water.

DEQ will use the list to help gain a better understanding of which pollutants to focus on as it examines ways to identify and reduce discharges of persistent pollutants that pose a threat to state waters. The 2007 Oregon Legislature, through passage of Senate Bill 737, directed DEQ to develop the list with the aid of “interested parties” in order to address toxics reduction statewide. DEQ has held monthly science workgroup meetings with toxics experts to narrow the list from a potential 2,100 pollutants to 175. DEQ expects to narrow down the list further after receiving additional comments from the scientific community, from sources such as municipal wastewater treatment facilities, and others.

“I’m very concerned, as most Oregonians are, about toxic pollutants in Oregon’s waterways,” said DEQ Director Dick Pedersen. “This is an incremental process, and we welcome comment on our progress so far. The final list will help us focus our efforts on pollutants that are likely to be in Oregon’s waters and present the most potential for harm.”

The draft list includes pesticides, industrial chemicals, pharmaceuticals and personal care products, flame retardants, PCBs and metals. Many of these pollutants are present in common consumer products. They are slow to break down in the environment and thus have a long-term impact on humans and wildlife that may ingest or absorb them. Many of the “personal care” toxic pollutants come from such commonly-used items as anti-bacterial hand soaps, insect repellents, shampoos and deodorants. Flame retardants used in the manufacture of electronic products can break down and leach into the environment. The list also includes several “legacy” persistent pollutants, such as DDT, that may now be banned but still linger in the environment years after they were used. These pollutants filter into rivers and streams through soil erosion, runoff from lawns, driveways and streets, and the simple act of flushing down the shower drain or toilet.

As part of Senate Bill 737, Oregon’s largest municipalities will develop plans to reduce toxics in wastewater treatment plant effluent and stormwater runoff. Those plans will include letting consumers know how to safely dispose of pharmaceuticals without flushing them down toilets, how to find alternatives to pesticides for yards and gardens, and other effective pollution prevention programs.

“The process DEQ developed to identify and prioritize this draft list was thorough and rigorous,” said David Stone, science workgroup chair and assistant professor of Oregon State University’s Department of Environmental Molecular Toxicology. “DEQ took great pains to document the decision process and the criteria used to rank each pollutant.”

Information sessions to be held

As a first step in narrowing the draft list of toxic pollutants, DEQ is holding information sessions throughout the state. DEQ will accept written and verbal comments at each session.

• North Bend, Tuesday, March 10, 5:30 to 8 p.m., North Bend Library, large meeting room, 1800 Sherman Avenue

• Klamath Falls, Wednesday, March 11, 5:30 to 8 p.m., Klamath County Courthouse, Commission Hearing Room, 305 Main Street

• Portland, Thursday, March 19, 5:30 to 8 p.m., DEQ Headquarters, 811 SW Sixth Ave., Room EQC-A (10th floor), at corner of SW Sixth Avenue and Yamhill Street. This meeting will also be accessible via conference call [call-in number: 877-214-5010, participant number 898168].

DEQ is accepting comments on the draft list of persistent, priority pollutants through 5 p.m. Friday, March 27. DEQ is particularly seeking comments based on scientific and technical information and views.

Comments may be mailed to Project Manager Cheryl Grabham, Oregon DEQ, 811 SW Sixth Avenue, Portland, OR 97204. They may also be e-mailed to, or faxed to Cheryl Grabham at (503) 229-6037.

To unsubscribe or edit your account click here.

This e-mail was sent to you by the Oregon Department of Environmental Quality in partnership with GovDelivery · 811 SW 6th Avenue · Portland OR 97204 · 503-229-5696

Enviro Q & A

EPA Email Subscription Service

EPA on Bioremediation

EPA on Phytoremediation

EPA Nanotechnology


New Process to Remove Cyanide

Facts About Cyanide

Wednesday, February 25, 2009

More Lessons 2/25/09

1. USDA's National Organic Program

2. ORIVAL Automatic Self-Cleaning Water Filters

3. terbutyl lithium explodes when it comes in contqct with air

4. Small Chemical Businesses and NanoScience-3/24/09- 1:30-5:30 pm
Salt Palace Convention Cneter, Ballroom A

5. ACS Careers, C & EN, and Pittcon
Sunday, 3/8/09 10 am - noon, rm S402, McCormick Place Convention Center

Monday, February 23, 2009

Carbon Sequestration

Sunday, February 15, 2009

National Geographic

Thursday, February 12, 2009

FTCua Science Lessons 13


































Sunday, February 8, 2009

Human Immunodeficiency Virus(HIV)/Acquired Immunodeficiency Syndrome(AIDS)

Solution: do not have multiple partners, do not have anal intercourse, go have medical exam before marriage, make sure your spouse do not have HIV/AIDS or other gonorrheal disease.

check blood before transfusion for HIV/AIDS virus...

Bloodborne Pathogen Protection Program(BPPP)

Sunday, February 1, 2009


Tuesday, January 20, 2009

Solid State Technology

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Nanophotonics - Wikipedia, the free encyclopedia
Nanophotonics is the study of the behavior of light on the nanometre scale. The ability to fabricate devices in nanoscale that has been developed recently ... - 24k - Cached - Similar pages -
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Oct 27, 2008 ... Silicon Integrated Nanophotonics. Development of on-chip optical interconnects for future multi-core processors ... .html - 13k - Cached - Similar pages -
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Nanophotonics - by Paras N Prasad - 433 pages
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Monday, January 19, 2009



24-29 JANUARY 2009

Web Watch from the Physics Today and Inhalants (a otra topico)

compiled and edited by Charles Day

Solve Puzzles for Science

An open-source nanotechnology recipe for magnetite nanocrystals requires only such simple ingredients as olive oil, lye, olive oil soap, vinegar, oleic acid, crystal drain opener, and rust.

is this called nanoremediation?


Women in Higher Education

you know how i "killed" the stench fromdead insects, molds forming in stagnant water that my branch of Zamio Zamiifolia was in (a coconut aluminum can)? by using Glade btterfly garden spray-fragrant flowers;

question: what is in it?

couldn't they use compressed air instead of butane or propane in spray cans like canola oil spray or glade mists or scented sprays...

Assignments for 1/19/09--More on Radon


follow up on carbon sequestration

filtration, dilution, spread, spatial distribution

sequestration underground and into the sea,

compaction, concentration,

from gas to liquid to solid


entropy-from order to disorder

opposite of entropy-from disorder to order


statistical mechanics



quantum physics and chemistry

National Oceanographic and Atmospheric Administration(NOAA)


humidity, temperature, pressure

instrumentations for humidity, temperature, pressure

polymerization-radiation, chemical,


Rutgers University has a Plastic Institute that I visited 25 years ago.




Begin forwarded message:

From: "Field, R W"
Date: January 18, 2009 10:39:10 PM EST
Subject: [RNPROF] The Environment, Health and the Future - 2009 Policy Summit
Reply-To: "Field, R W"

If in the Midwest, please urge your state legislators to attend

The Environment, Health and the Future - 2009 Policy Summit
January 29-31 – Blackstone Hotel in Chicago

Superfund Basic Research Program
National Conference of State Legislatures

The overarching goal of the workshop is to translate research into knowledge that is important to legislators in the center of the country. The University of Iowa and the National Conference of State Legislatures (NCSL) are co-sponsoring this workshop, primarily through the Iowa Superfund Basic Research Program (isbrp). The goal is to bring science to the process of creating state environmental policy on the following issues: 1. Polychlorinated biphenyl (PCB) in the Great Lakes region and new chemicals; 2. Healthy Homes and Buildings-lead, radon, energy efficiency and regulations. 3. Adaptation to climate change through flood preparation and renewable energy production.

R. William Field, PHD, MS


Department of Occupational and Environmental Health

Department of Epidemiology

College of Public Health

N222 Oakdale Hall

University of Iowa

Iowa City, IA 52242


RN PROF (subscription changes) - RN LEADERS -

National Environmental Health Association(NEHA)

The National Environmental Health Association (NEHA) is
sponsoring a 2½ day (all expenses paid) training in Washington,
DC. The training is designed to enhance your efforts to implement
radon-resistant new construction (RRNC). You will work with
EPA staff, NEHA field partners who have successfully implemented
RRNC in their communities, local code officials and builders, other
national affiliate partners, and nationally recognized instructors.
You will see specific examples of how to develop an effective, results oriented
program. And, you will develop your own comprehensive
strategy to guide you in your efforts in promoting RRNC as part
of your radon risk reduction strategy. The training will include an
extensive overview of RRNC techniques and presentations on radon
health effects, including recent research.

Applications must be received by the close of business on
Monday, January 19.

For details

R. William Field, PHD, MS

RN PROF (subscription changes) - RN LEADERS -

Saturday, January 17, 2009

More on Radon

RNPRO (subscription changes) -


And don’t forget Radar Action Month!

Quick action needed to counter serious indoor-air pollution

Friday, January 16, 2009


Niton, Aribex, Bruker AXS, Metorex,

My second book, Element Concentration in Teeth reviewed many elemental analysis methods also.

Material Characterization

Feature: H-M-Analytical

Some Common Abbreviations for Analytical Techniques Used in Material Characterization

AAS Atomic Absorption Spectroscopy
AEM Analytical Electron Microscopy
AES Auger Electron Spectrometry
AFM Atomic Force Microscopy
AMS Accelerator Mass Spectrometry
APCI Atmospheric Pressure Chemical Ionization
CE Capillary Electrophoresis
CI Chemical Ionization
DSC Differential Scanning Calorimetry
DMTA Differential Mechanical Thermal Analysis
DTA Differential Thermal Analysis
ECD Electron Capture Detection
EDS Energy Dispersive Spectrometry
EDXA Energy Dispersive X-ray Analysis
EI Electron Ionization
EM Electron Microscopy
EPMA Electron Probe Microanalysis
ESCA Electron Spectroscopy for Chemical Analysis
ESI Electrospray Ionization
FAB Fast Atom Bombardment
FID Flame Ionization Detection
FT-IR Fourier Transform Infra-red Spectrometry
FT-NMR Fourier Transform Nuclear Magnetic Resonance Spectroscopy
GC Gas Chromatography
GPC Gel Permeation Chromatography
HPLC High Performance Liquid Chromatography
IC Ion Chromatography
ICP Inductively Coupled Plasma
IR Infra-red Spectroscopy/Reflectography
LC Liquid Column Chromatography
LSC Liquid Scintillating Spectrometry
MALDI Matrix Assisted Laser Desorption Ionization
MS Mass Spectrometry
NMR Nuclear Magnetic Resonance Spectroscopy
PID Photo Ionization Detection
PIXE Particle Induced X-Ray Emission
PLM Polarized Light Microscopy
PyGC Pyrolysis Gas Chromatography
PyMS Pyrolysis Mass Chromatography
RBS Rutherford Backscattering Spectrometry
SAM Scanning Auger Microscopy
SEM Scanning Electron Microscopy
SIMS Secondary Ion Mass Spectrometry
STM Scanning Tunneling Microscopy
TEM Transmission Electron Microscopy
TG Thermal Gravimetry
TGA Thermo-Gravimetric Analysis
TLC Thin Layer Chromatography
TMA Thermo-Mechanical Analysis
UV-VIS Ultraviolet-Visible Range Spectroscopy
WDS Wavelength Dispersive Spectrometry
XPS X-Ray Photoelectron Spectroscopy
XRD X-Ray Diffraction
XRF X-Ray Fluorescence

Wednesday, January 14, 2009

Nanotechnology Now

From: Nanotechnology Now
Date: January 14, 2009 6:25:19 PM EST
Subject: Top Government Officials Will Explain Nanotechnology Regulatory Plans at FDLI Conference Feb. 18-19 in D.C.

The Food and Drug Law Institute, in partnership with Burdock Group and Arizona State University, has assembled the top officials at the agencies responsible for the regulation of nanotechnology products—including the Food and Drug Administration and the Environmental Protection Agency--to discuss their plans for managing and monitoring these products at the 2nd Annual Conference on Nanotechnology, Law and Regulation.

FDA speakers include: Norris Alderson, FDA Nanotechnology Task Force; John Weimer, Office of Chief Counsel; Subhas Malghan, Center for Devices and Radiological Health; Linda Katz, Center for Food Safety and Applied Nutrition; Mitchell Cheeseman, Center for Food Safety and Applied Nutrition; and Douglas Throckmorton, Center for Drug Evaluation and Research. Jessica Barkas, Program Attorney in the Chemical Control Division of the Environmental Protection Agency, also will be speaking at the meeting.

Other featured speakers and moderators include: Scott Livingston, Capital Management/The Livingston Group; Andrew Maynard, Woodrow Wilson International Center for Scholars; Sean Murdock, NanoBusiness Alliance; Jay Ansell, Personal Care Products Council; John Howard, Public Health Law Program, Centers for Disease Control;Erli Chen, Nanotechnology Commercialization Group, NTI; and Steffi Friedrichs, Nanotechnology Industries Association.

To register for the conference, visit or call (800) 956-6293 or (202) 371-1420.

Nanotechnology Now is a media sponsor for this event.

Stochastic aspects of primary cellular consequences of radon inhalation.

Stochastic aspects of primary cellular consequences of radon inhalation.
Radiat Res. 2009 Jan;171(1):96-106.

The present calculations with our composite microdosimetric model confirm the assumption that the strong inhomogeneity of radon progeny deposition within the central respiratory passages results in non-uniform local distributions of radiation dose along the epithelium of the bronchi. The “hot spots” of nuclide deposition close to the carinal ridges are transformed into more widely dispersed high radiation dose areas around the bifurcation units of the airways, but dose is still distributed inhomogeneously among the cell nuclei of the epithelium. On a log-log scale, the number of hit cell nuclei decreases linearly as a function of the number of hits per cell nucleus. In the case of the exposure lengths analyzed in this study, the cell nuclei receiving multiple hits are located mainly in the neighborhoods of the carinas. In spite of the fact that maximum cell nucleus doses were found among these nuclei, the cells possessing high transformation probabilities were not restricted to the cells whose nuclei were hit more than once. This phenomenon can be explained with the help of our results obtained for cell inactivation probabilities, according to which a considerable number of the hit cells have high inactivation probabilities, independent of the number of hits. Only a very small percentage of the cell nuclei of our tracheobronchial geometry model were actually hit by α particles. As a consequence, orders of magnitude increases were observed in the mean nuclear dose and cell transformation probabilities if only the exposed cell nuclei were considered instead of all the cell nuclei. The maximum doses and transformation probabilities were close to the mean values if only the exposed cells were considered. On a log-log scale, the maximum dose increases as a function of the number of inhalations. The maximum transformation probability asymptotically approaches its maximum of 10−3. This phenomenon can be elucidated by the fact that high doses yield high inactivation probabilities that prevent cell transformation by killing the cell. The sum of the nuclear doses, the number of the killed cells and the number of the cell transformations vary in linear fashion as a function of the number of inhalations. Thus, based on the model applied in this work, an LNT relationship exists between the number of cell transformations and the length of exposure in case of radon inhalation.


It is in a pdf file. (1.1 MB)