chemical valence
2.The results showed that the chemical score (CS), essential amino acid index (EAAI), biological valence (BV) and nutritional index (NI) in the protein of ?P. tuber-regium ?sclerotium cultivated with corn starch as its carbon source were 11.63, 69.80, 64.40 and 9.98 resp, all held the first place in 4 carbon sources tested;
3.The relation between the crystal formula and bonding formula-bonding formula equation, was established. The effective charge of a valence electron was given. The theoretical calculation of chemical bonds on complex crystals was solved systematically and it is applied to calculate Y_3Al-5O_(12), YAlO_3, Y_2O_3, YVO_4 and YPO_4 crystals.

