Abstract ▼ AI-Helper

This study lied its purpose in examining the overall experiments on the detection of the photoassimilate and finding out its problems, and suggesting the way of dealing with the experimental material, and the method which could be learned with safety and ease in the real classroom. The textbooks now...

This study lied its purpose in examining the overall experiments on the detection of the photoassimilate and finding out its problems, and suggesting the way of dealing with the experimental material, and the method which could be learned with safety and ease in the real classroom. The textbooks now in use were not to give proper explanations on the process of the detection of the photoassimilate. Results of these studies are expected to show how to conduct an easy experiment as follows; 1. Put around the part of the leaves of clover (Trifolim repens), dayflower (Commelina communis), snow-on-the-mountain (Euphorbia marginata), and a rose of Sharon (Hibiscus syriacus) with the aluminum foil to avoid the sunshine around 4 to 5 p.m. on the previous day, and picked up the leaves after 10 p.m. on the day of the experiment. In another way, it was also good to cover the leaves with the aluminum foil after some letters being carved on them. 2. Took off the aluminum foil from the picked leaves and boiled them for 3 minutes in a seething water. 3. Put the boiled leaves into 100㎖ beaker which contains 60㎖ ethanol, and transfered this 100 ㎖ beaker into 200㎖ beaker again with 50 ㎖ water in it, and warmed it up in this double boiler system with an alcohol lamp to decolorize the leaves. 4. After taking the decolorized leaves out and washing them in the water, and then put them on the Petri dish which contains 10% Lugol's solution. Washed them off 2 to 3 minutes after the iodine-starch reaction appears, and compared the part of the leaves which were covered with the aluminum foil with the other part. 5. Use the boiled rice and the cooked glutinous rice, potatoes ,bread and so on as a control group of iodine-starch reaction.