Particulates or particulate matter in the Air in Freiburg

This is an english summary of my page about my little air quality sensor.

The story behind it is explained very simply: One day I decided to visit the people of in Stuttgart and have a look at their project. They have cleverly designes a particular matter sensor for both PM10 and PM2.5 that costs less then 30 Euros.

Because of their small size, particles on the order of 10 micrometers or less (PM10) can penetrate the deepest part of the lungs such as the bronchioles or alveoli. Similarly, so called fine PM, (often referred to as PM2.5), tend to penetrate into the gas exchange regions of the lung (alveolus), and very small particles (< 100 nanometers) may pass through the lungs to affect other organs. So these particles are not something you should take lightly. And these particulates are a good indicator for other Air polutants such as NOx. Both are caused by burning stuff, either to heat your house or when you drive around in a car.

The effects of inhaling particulate matter that have been widely studied in humans and animals include asthma, lung cancer, cardiovascular disease, respiratory diseases, premature delivery, birth defects, and premature death.


In Europe PM10 particulates should not exceed 50 µg/m3 on a Daily average for more then 35 days. The worst air in Germany is often found in Stuttgart, but Freiburg beeing in a valley also has problems. Thats why I decided to put upt he first sensor from this citizen science network.

The graphics you see are taken from my sensor outside on my balcony. The grey thing next to my little polar pear houses the sensor. You can build these fairly easy yourself.

These graphics should be refreshed every 15 min. This one shows the measurement over one week. Note 50 µg/m3  are the limit:

To see if the 50 µg/m3 for PM10 has been broken, see this chart:

„Particulates or particulate matter in the Air in Freiburg“ weiterlesen


Ich fahre heute nach Köln um Knochenmark zu spenden.

Als guter Lehrer verwurstet man so eine Aktion natürlich auch gleich im Unterricht. In diesem Fall im Englisch Unterricht. So ein Artikel über Kochenmarkspende hat viele schöne Fremdwörter, die man als Schüler nachschlagen kann. Für die Stunde war also der Plan, dass die Schüler den Text von der Website des National Health Service des Vereinigten Königreich lesen, den wir ihnen als Arbeitsblatt zur Verfügung gestellt hatten. Interessant war das meine Mentorin auch noch Fehler in dem Text fand.

Dann sollten sie dann erst überlegen, was die einzelnen Worte heißen könnten, dies notieren und dann nachschlagen in Online Diensten wie Leo, Wikipedia oder Merriam-Webster um herauszufinden was es heißt. Bewußt haben wir uns gegen google Translate entschieden. Dazu auch mehr Infos auf dem Arbeitsblatt.

Das Arbeitsblatt zu der Stunde, habe ich hier als PDF hochgeladen:(PDF) worksheet_bone_marrow_donation

Wahrscheinlich werden wir das Thema nach den Ferien nochmal aufgreifen um dann auch meine Erfahrungen zu verarbeiten.

Weitere Informationen zu dem Thema gibt es auf der Website der DKMS.


Learning for the exams

Yesterday we had the first meeting of our english state exams learning group. I already started learning and reading the books but of course there is a lot to do and some of the others are even writing their thesis right now! Luckily I wrote my thesis already and now can concentrate on studying.

The topic for the English exam will be:

Cultural Studies: From Churchill to Cameron – Politics in Britain since WW II

And keywords are:

  • Political developments in the UK
  • Britain’s position in the world (wars, in the EU, Commonwealth)
  • Foreign Policy
  • Immigration and Multicultural society
  • Role in the classroom (e.g. ICC, multiculturalism, Britain in the Classroom)

He gave us quite a reading list and some I already studied, thats because I want to present some of the juiciest quotes here:

From Patriots – National identity in Britain 1940 -2000 by Richard Weight, p 300: “ Tory MP Bob Bothby, who was then sleeping with Harold Macmillan’s wife, Dorothy, observed: ‚In 1935 we were on top of the world: by 1956 it had all gone. It took the Roman Empire three hundred years of of most enjoyable decadence to achieve that end: all we can do is seek a fraction of that decadence in what we call our permissive society“

At least there is still very pleasant old English tunes, that you get to know when studying about, like Greensleves:

And on the Decline of the Empire and the Profumo affair (p. 269): „Nancy Mitford compared 1960s Britain to Venice in the sevententh century: ‚Perhaps‘, she suggested, ‚masked naked men, orgies and unlimited spying are an accompaniment of maritime powers in decline. Certainly the whole Ward affair comes straight out of Casanova'“

At least learning for the exams with the topic „Britain from Churchill to Cameron“ is at least entertaining.

Much less spicy but easier to read is Andrew Marr’s „A History of Modern Britain„. He is a BBC journalist and produced a TV series on the same topic as well:

„Learning for the exams“ weiterlesen