Day: December 24, 2022

雷春杂文：mRNA疫苗科普 写于2020年感恩节前夕 前言 人体的防御系统，是一个有条有理、精确细致的复杂体系。...

Mrs. Pfahnl’s Bio A Lab DNA Extraction Purpose: Extract DNA from fruits at home. Materials: 1. Dish wash detergent 1 tablespoon 2. Salt 1 tablespoon 3. Water 1 cup 4. One new ziplock bag (sandwich...

Mrs. Pfahnl’s BioA Lab: Fermentation 2 Yeast Dough Yeast is an eukaryote. It is a single cell fungi. Bacteria is a prokaryote. The products from yeast fermentation are carbon dioxide and ethanol....

Mrs. Pfahnl’s Bio A Lab: Fermentation 1 Yogurt Fermentation does not require Oxygen. There are two types of fermentation: Lactic acid and alcohol. Yogurt making is similar to our muscle during...

Mrs. Pfahnl’s Bio A Lab: Osmosis Osmosis is a passive transportation of water molecules through semipermeable cell membrane. The purpose of the experiment is to investigate the different salt...

Mrs. Pfahnl’s Bio A Lab: Catalase September 29, 2020 Purpose: Investigate catalase activities in different fruits or vegetables. Materials: 1. Hydrogen peroxide 3% from any drug store2. Dish...

雷春杂文：疫情里美国高中开学历险记 写于2020年8月28日 星期五 终于感到可以透一口气了。 第一周 预备教学、一片混沌...

雷春杂文：疫情中开学的点滴 2020年8月9日 第一部分 宾夕法尼亚大学工程学院父母欢迎网络会记录 学校主持人 Rachel Shearon...

Physical Science 2020 Fall Syllabus Physical Science with Lab Basic Course Information Course Name: Physical Science with Lab Semester: Fall 2020 Location: CECFC High School Room 222 and or online...