Page 215 - Journal of Library Science in China, Vol.47, 2021
P. 215

214   Journal of Library Science in China, Vol.13, 2021
































                             Figure 2. Absolutely Essential diagram: the tricarboxylic acid cycle


              Furthermore, the periodic table is fundamental to the core knowledge of chemistry and is
            indispensable, making it an absolutely essential diagram. In contrast, something similar, like the
            amino acid cycle diagram, falls into the “better to have than not” category, making it a relatively
            essential diagram, as shown in Figure 3.






























                                Figure 3. Relatively Essential Diagram: Amino Acid Table
   210   211   212   213   214   215   216   217   218   219   220