Design a solution to a complex real-world problem, based on scientific knowledge, student-generated sources of evidence, prioritized criteria, and tradeoff considerations. Though ultraviolet (UV) light can be detected with electronic devices, a simple and colorful way to detect ultraviolet (UV) light is with UV-sensitive beads. UV beads change color when they are exposed to sunlight or to another ultraviolet (UV) light source, but they remain white or off-white when indoors. Because lightbulbs in homes and businesses do not produce ultraviolet light, the UV beads are colorless when kept indoors. But if you take them outside on a sunny day, UV light from the Sun turns them a variety of colors, including red, orange, yellow, blue, and purple. Some people even make bracelets from the beads so they know when they are exposed to UV light.

UV Beads - Steve Spangler Science Teach Sun Safety with UV Beads - Steve Spangler Science

Review and Revise: Have students re-read their initial journal entries from the first lesson in this unit, Electromagnetic Radiation, and correct any misconceptions. Have them share with the class the corrections they made. Zilionis, R. et al. Single-cell barcoding and sequencing using droplet microfluidics. Nat. Protoc. 12, 44–73 (2016).Syringe pumps (NE-500 Programmable OEM Syringe Pump, New Era Pump Systems) were controlled with a custom python script (see data availability) and the operation monitored on an inverted microscope. The syringes were connected to the microfluidic device with PE tubing (Scicominc, #BB31695-PE/2). To generate an electric filed for droplet merging a DC power supply (HY3003D) was used and set to 1.6 V output. DC current was converted to AC with a Elevam P-878 power inverter. Droplet merging was achieved using 1 M NaCl as electrode 35. Cell encapsulation and barcoding

How effective is your sunscreen? – Science in School

Qin, D., Xia, Y. & Whitesides, G. M. Soft lithography for micro- and nanoscale patterning. Nat. Protoc. 5, 491–502 (2010).Explain how biomedical engineers can begin to design solutions that prevent skin cancer if they know more about the causes. I've taken the beads to doctors' offices (especially the dermatologist's and the optometrist's), with some spares for the doctors to share with their staff and patients. I've also made over a hundred for a friend who opened a spa recently, so that she could give them out at her grand opening and during Spa Week, to make her clients aware of how much UV there can be even on a cloudy day or in the shade. Most recently I've made 90 (with white beads and connectors) for a family wedding (informal, in a garden), to be used as favors during the reception; we made little kits with beads and pipe cleaners for the attending children to make bracelets.