Synthesis, spectroscopic and magnetic properties of nickel(II) with N-protected amino acids: crystal and molecular structure of bis(N-acetylglycinato)tetraaquonickel(II)
Abstract Nickel(II) complexes of the general formula NiL2·nH2O have been prepared with various N-protected amino acids and characterized by thermogravimetric, magnetic susceptibility, IR and UV spectroscopy. The crystalstructure of bis(N-acetylglycinato) tetraaquonickel(II) has been determined. The coordination around nickel is octahedral with two acetylglycine ligands trans to each other. Acetylglycine
CROSSLINKED POLY-DEPSIPEPTIDE COPOLYMERS AND METHODS OF MAKING THEREOF
申请人:The Board of Trustees of the Leland Stanford Junior University
公开号:US20160083516A1
公开(公告)日:2016-03-24
Aspects of the present disclosure include methods for preparing crosslinked polydepsipeptide copolymers by stereolithography (e.g., 3-D printing). In practicing methods according to certain embodiments, a crosslinkable copolymer containing a depsipeptide having one or more hydrolysable crosslinkers is photocrosslinked by stereolithography to produce a crosslinked polydepsipeptide copolymer. In certain embodiments, methods include contacting the crosslinkable poly(depsipeptide-co-ε-caprolactone) copolymer precursor with one or more bioactive agents and photocrosslinking by 3-D printing to produce a crosslinked poly(depsipeptide-co-ε-caprolactone) copolymer with incorporated bioactive agent. Crosslinkable polydepsipeptide copolymer precursors and crosslinked polydepsipeptide copolymers are also described.
Age-Related Differences in Supervisory Attentional System Functions
作者:P. Andres、M. Van der Linden
DOI:10.1093/geronb/55.6.p373
日期:2000.11.1
The authors explored the effect of age on executive functions by using 3 tasks (Tower of London, Hayling, and Brixton tests) designed to assess specific executive processes (planning, inhibition, and abstraction of logical rules) that were also sensitive to frontal dysfunction. The performance of elderly participants (n = 48) was significantly poorer than that of young participants (n = 47) in all 3 tasks. Processing speed, measured by means of a color-naming task, explained some but not all of the age-related differences. These results are discussed in terms of general and specific factors in cognitive aging.
Fischer,E., Chemische Berichte, 1908, vol. 41, p. 2872
作者:Fischer,E.
DOI:——
日期:——
Fischer,E., Chemische Berichte, 1904, vol. 37, p. 2490