Three New Coordination Compounds with Push-Pull Ligand p

International audienceFrom ethanolic solutions containing p-aminobenzonitrile (4ABN) and the respective metal salt three new coordination compounds were obtained and their crystal structures solved and refined from X-ray single-crystal diffraction data: [Ag(4ABN)4/2]BF4 (P 21/n, Z = 4) (1), [Cu(4ABN)4/2(H2O)2](NO3)2 x 2 H2O (P -1, Z = 2) (2) and [Co(4ABN)2(H2O)2Cl2] (P 21/n, Z = 2) (3). 1 is a coordination polymer with a distorted tetrahedral AgN4 coordination and layered polymeric [Ag(4ABN)4] cations, which are held together by van der Waals interactions. It represents the first homoleptic complex of 4ABN. In 2 Jahn-Teller distorted CuN4O2 octahedra are connected to polymeric chain-like [Cu(4ABN)4/2(H2O)2] cations, which are interconnected by hydrogen bonds including further water molecules and NO3- anions. 3 is a complex with an octahedral CoCl2N2O2 coordination. In the solid state structure, they are held together by N-H...Cl hydrogen bonds

Apoptosis at Inflection Point in Liquid Culture of Budding Yeasts

Budding yeasts are highly suitable for aging studies, because the number of bud scars (stage) proportionally correlates with age. Its maximum stages are known to reach at 20–30 stages on an isolated agar medium. However, their stage dynamics in a liquid culture is virtually unknown. We investigate the population dynamics by counting scars in each cell. Here one cell division produces one new cell and one bud scar. This simple rule leads to a conservation law: “The total number of bud scars is equal to the total number of cells.” We find a large discrepancy: extremely fewer cells with over 5 scars than expected. Almost all cells with 6 or more scars disappear within a short period of time in the late log phase (corresponds to the inflection point). This discrepancy is confirmed directly by the microscopic observations of broken cells. This finding implies apoptosis in older cells (6 scars or more)

Preswitt EIF Rainscreen System

CCMC Evaluation Report 12973-RPeer reviewed: NoNRC publication: Ye