The Johnson Lab gave a CAICE demo at Yale Science Saturday for New Haven area students and the general public this weekend. They looked at ions in rainwater, detecting them with a salt-water circuit set-up. We had fun!
The Johnson Lab held demos for New Haven area students as part of the Yale Chemistry Pathways outreach program. They learned about atmospheric and oceanic chemistry and how that impacts the earths' climate. Mark also showed students around the lab to show them what a working pchem lab looks like!
Several Johnson Lab members also served as judges for the 22nd Annual New Haven Science fair for K-12 students in the New Haven area, where they saw some pretty interesting and promising projects from local 5th graders.
The Johnson Lab gave lab tours to New Haven area high school students participating in the Yale Pathways Summer Program as part of their spectroscopy class led by Prof. Ziad Ganim.
The Johnson Lab gave lab tours and held demos for New Haven area students as part of the Yale Chemistry Pathways outreach program. They learned about atmospheric and oceanic chemistry and how that impacts the earths' climate. The also participated as judges for the New Haven Science Fair for K-12 students.
May 18, 2013:
Professor Johnson gave a public lecture titled "The Wild World of Electrified Water" for the Tilde Cafe series of lectures. In it, he touches on the origins of electrospray ionization and the basic physical principals involved in bringing large molecular assemblies out of solution and into the gas phase.
May 11, 2013:
The Johnson Lab welcomed over fifty elementary through high school students for the Yale Pathways to Science event. We introduced the students to the basics of electrospray ionization, and how we utilize electricity to trap and manipulate ions.
Electrospray ionization is a technique developed to extract ions of interest directly from solution. It was developed by John Fenn (originally at Yale University, for which he won the Nobel Prize in Chemistry in 2002). The technique is used in countless mass spectrometers today to study a wide range of molecules, from metal centered catalysts to intact proteins. In the clip below, you can watch an electrospray plume, or "Taylor Cone" form by holding the tip of a syringe at high voltage (around 3000 Volts!).
This movie focuses on an ethanol droplet cloud chamber. By saturating a glass chamber with ethanol vapor and cooling it with dry ice, a visible cloud of ethanol droplets forms. The striking result is the visualization of thousands of streaks through the clouds in every direction. These streaks are induced by cosmic radiation penetrating the cloud from every direction and seeding the formation of a streak of droplets. We are being pummeled with these cosmic rays everywhere we go!
The Johnson Lab welcomed participants in the Yale Pathways to Science program in our research lab. We explored the way we use temperature to freeze chemical reactions in action, and discussed the range of temperatures we find on our planet.
Professor Johnson gives an interview with Chemistry World magazine on the current state of Physical Chemistry. The podcast and interview are available online.