The residue fraction was analyzed following digestion with 72% sulphuric acid.
Depending on the results we also used combinations of dry heat, wet heat and sulphuric acid.
Seeds scarified by soaking in sulphuric acid (amount of time not given) germinated to 48%.
One could hypothesize the existence of microorganisms that can tolerate this level of sulphuric acid that have not yet been discovered.
This method uses a mixture of anhydrous acetic acid and sulphuric acid, which is heated to prepare pollen for examination under a light microscope.
There are a number of ways around the sulphuric acid problem.
A useful summary of the new topic of sulphuric acid cave genesis is included.
The residue fraction was analyzed following digestion with (72%) sulphuric acid.
