danaleeling

Floral litmus solutions laboratory. A demonstration of the use of local flowers to generate litmus solutions for sorting out acids and bases. DeBrum works on boiling flowers Rebecca, Marcyliza, and Gloria testing a floral litmus solution to determine whether the solution will change color (not luminosity nor brightness) when a known acid (lime fruit) and a known base (baking soda) are added. Trinia and Heroleen testing a floral litmus solution Nancy and Gibson testing unknowns using their working floral litmus solution Nancy shows her results Marcyliza with her results Jade, Myreesha, and Rebecca boiling flowers This is phase I on the right, phase II on the left I reversed the board layout, right to left, to match the table layout in the room Detail view of phase II directions Phase III directions Nancy shows the color changes against a white background Darleen watches the color change in her solution Andy  ...

At the start of the term I promised the class that they would get wet in the rain outdoors. The El Niño drought almost made a liar out of me. On the last outdoor ethnogarden working day the sky opened up and blessed the class with rain. Cherlylinda, Sage, Angela clean around the Senna alata Randy sorting out Senna alata from Ischaemum polystachyum Sandra and Stewart Kerat to the left of Gardenia jasminoides, Jeanie, Cherlylinda, Sage. Chance in the background Angela hand pulling under the Senna alata Rebseen Merremia peltata buds Merremia peltata flowers, late afternoon. Iohl is a morning glory! Randy, Stewart Sandra in front of the Jasminum sambac Angela, Helen, Sunet Ravelyn Helen, Sunet Sage Dukay pulling reh padil Sweena, Dukay Sweena Michelle with a machete Cleaning around Senna alata Sweena Documenting late arrivals Darren, AL, and Rogan Michelle, Ravelyn, Stewart, ...

I worked to get two Ohm's law rigs up and running with multi-decade old Decade Resistance boxes. Ultimately I was limited by a lack of additional battery holders - the source of varying the voltage. Jansper resourcefully manually holds a seventh battery to produce a series voltage of 10.5 volts DC in the circuit. Nancy pointing out another holder at the other set up. Two rigs cannot be run without cannibalizing battery holders. Some of the data is seen below.

The invasive species walk also doubled as a chance to review the ethnobotanically useful plants around the east end of the campus. A single sheet had the potentially invasive plants on one side , and the the final exam flora list on the other . Note the while OSX Safari will display the columnar layout, Safari will not print that layout. FireFox was deployed to print the back side final exam flora list. The walk started out at the Terminalia catappa. I used the dirt around the heavily shading tree to note the concept of shade tolerance. Then I walked over to the Falcataria moluccana, covering also Sphagneticola trilobata. Then we headed north across the road to look at Mimosa pudica, Ischaemum polystachum, Clerodendrum inerme (not an invasive here, medicinal), and the toxic Ipomoea carnea. Near the Ipomea was Pennisetum purpureum. On my way across the main road to the Clerodendrum quadriloculare I noticed Hippobroma longiflora. There I covered allelopathy. I headed back wes...