Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Van Krevelen diagrams constructed on FTICR MS data of the 9 humic materials and 1 shilajit sample under study. Colors correspond to aromaticity of molecules: black – condensed aromatics (AImod≥0,67); blue – aromatics (AImod≥0,5); red – non-aromatics (AImod<0,5). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
