Polynuclear transition metal complexes such as the P-cluster and FeMo-cofactor of nitrogenase with eight centers represent a great challenge for current electronic structure methods. In this work, we initiated use comb tensor network states (CTNS), whose underlying topology has one-dimensional backbone several branches, many-body wavefunction ansatz to tackle these challenging systems. As an im...

Mesoporous MCM-41 silicas anchored with sulfonic acid (–SO3H) groups (denoted MSN-SA) via postsynthesis modification are very effective for the Beckman rearrangement. A simple and convenient procedure for conversion of a variety oximes to their corresponding amides and lactams has been developed. The reaction was carried out in the presence of MSN-SA as the catalyst. The best results for conver...

In a former publication 1 I have shown that the two types of cells which especially act as phagocytes, namely the polynuclear leucocytes with fine granulation and the large mononuclear phagocyte or macrophage of Metschnikoff, are each characterized by a distinct proteolytic enzyme. That enzyme which is contained in the polynuclear leucocytes and as I have previously shown 2 is manufactured in t...

BACKGROUND There is a continuing need for non-aluminium and non-calcium-containing oral phosphate binders. A novel product, i.e. stabilized polynuclear iron hydroxide, has experimentally been shown to be an effective phosphate binder. The purpose of the study was to test the efficacy and tolerability of the compound in hyperphosphataemic patients with stable preterminal renal failure. METHODS...