06/04/2015 Final Exams II
06/15/2014 End of Year Activity – Lab Clean-Up
06/08/2014 Final Exams – End of Year Preparation
O6/01/2014 High School Lab Activity –Tie Dyeing
The book Chemistry on a Budget contains inexpensive chemistry labs that are useful with easy to obtain materials.
There are two versions of each lab, one with a ten-question conclusion and one with directions for a full lab report. This way the teacher has the option! Each lab is two pages to allow for one two-sided handout.
You can buy this lab book for $23 at amazon.com or lulu.com. It will take 1-2 weeks to get to you -- Order Now. It’s a great resource, especially with the 2016-2017 science budget being used up!
*Some of you have already purchased my lab book – be sure to check out Page 141 !
“The 1986 Chernobyl nuclear disaster in Ukraine released substantial quantities of radioactive particles, especially caesium-137 (137Cs). Transported by winds and deposited by heavy rainfall, the caesium polluted large swaths of the European continent. ‘Much of the continent's topsoil layers are still radioactively contaminated,’ says Ulf Buentgen, Head of the Dendroecology Group at the Swiss Federal Research Institute (WSL) and lead author of the study.”
“This result is surprising because many types of fungi, including truffles, grow underground in -- and draw nutrients from -- soil prone to accumulating radioactive pollution. Deer truffles, for example, a type of 'false' truffles (not of the Tuber genus) more appealing to deer or wild boar than to humans, range among the most contaminated fungi. The team says that in regions where the radioactive fallout after Chernobyl was most intense, not only mushrooms but also higher components in the food chain, including game meat of red deer and wild boar, still have excess values of 137Cs.”
“The researchers focused on Burgundy truffles (aka summer truffles), one of three main species of economic value. While white and black truffles only grow in limited corners of Italy and the Mediterranean, Burgundies have a relatively wide geographic distribution, occurring throughout many parts of Europe that were affected by the nuclear fallout. …
The researchers took to the forest in search of their own samples, truffle-sniffing dogs in tow. In the end they managed to assemble 82 specimens from across Switzerland and Germany, along with a few from France, Italy and Hungary. Many of the truffles they collected personally, while others came from more open-minded collaborators. Back in the lab, they used a gamma-ray spectrometer to measure cesium levels in each sample.”
“The researchers are unsure how their results would change if they had collected samples in areas with even higher 137Cs deposition, such as parts of Belarus or central Austria. ‘We really don't know,’ Büntgen acknowledges. ‘We will, however, continue to spatially expand our search to include truffles from regions that were so far not considered - the more the better.’
Another unsolved issue is why Burgundy truffles are far less susceptible to radioactivity contamination than other fungi. The researchers speculate a reason could be the way Tuber aestivum uptakes nutrients from the soil compared to other types of mushrooms. However, they say they need to do more research to know exactly why summer truffles are not radioactive.”
Previous posts about Nuclear power issues include:
2/11/2015 Introduction to Nuclear Chemistry
02/18/2015 Nuclear Chemistry – Part II (Fission,
Fusion & Half-Life)
08/06/2015 Post-Fukushima Restarts
10/30/2015 Current Event – Radioactive Waste
10/22/2015 The Future of Nuclear Fusion
02/20/2016 Nuclear Waste and Lake Huron
03/26/2016 Nuclear Waste Storage
07/31/2016 Cost of Nuclear Shutdown in Germany
08/07/2016 Debate about Nuclear Power
11/18/2016 Chernobyl New Safe Confinement
*This Blog contains several entries that would be helpful to your chemistry classroom. Check out the Topic List to help you to find past Blog entries.
Also, Write To Me about your successes, challenges, or questions in the Chemistry Classroom.
Remember, buying a copy of the lab book Chemistry on a Budget can be very useful to your Chemistry classroom with labs and class article ideas.
Have a great weekend!