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Those aren't theoretical differences

The porous structure of biochar, which enables greater growth of these bacterial strains through appropriate airflow, ensuring greater accessibility and absorption of nutrients as well as greater strain tolerance against various adverse conditions, including drought stress, is the reason for the positive correlation between rhizobacteria that promote plant growth and biochar (Sangeetha 2012)

A curved arrow points upward from 5-methylTHF to THF, indicating that THF is regenerated after methyl-group donation to homocysteine

10.1016/j.heares.2004.10.011

Front Pharmacol 2022;13:876469