Abstract: Certain populations of small cells present in adult human tissue can undergo activation/development to form human pluripotent stem cell populations. These small cells are generally less than six micrometers in diameter and are CD49f-positive, and are referred to herein as human early stage precursors or CD49f+ cells. Accordingly, provided are cell populations and compositions with enriched CD49f+ cells from adult human tissue samples and methods and compositions for promoting activation/development of these CD49f+ cells. Upon differentiation, the activated stem cells can be used for various therapeutic purposes.

Abstract: A novel complex capable of fixing dinitrogen and use thereof are provided. A complex represented by formula (1A) or (1B) or a cationic or anionic complex from the complex: wherein M1 to M4 (M1 to M3 in the case of formula (1A)) are each independently Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W, and L1 to L4 (L1 to L3 in the case of formula (1A)) are each independently a ligand selected from among a ligand (Cp) including a substituted or unsubstituted cyclopentadienyl derivative, a diphenylamine ligand, a diphenylphosphine ligand, and a carboimideamide ligand.

Abstract: A novel complex capable of fixing dinitrogen and use thereof are provided. A complex represented by formula (1A) or (1B) or a cationic or anionic complex from the complex: wherein M1 to M4 (M1 to M3 in the case of formula (1A)) are each independently Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W, and L1 to L4 (L1 to L3 in the case of formula (1A)) are each independently a ligand selected from among a ligand (Cp) including a substituted or unsubstituted cyclopentadienyl derivative, a diphenylamine ligand, a diphenylphosphine ligand, and a carboimideamide ligand.