Medical Library

Individualized growth assessment of fetal thigh circumference using three-dimensional ultrasonography.
OBJECTIVES: To develop individualized growth assessment (IGA) standards for upper (ThC(u)) and middle (ThC(m)) fetal thigh circumferences using three-dimensional ultrasonography. METHODS: A prospective, longitudinal sonographic study of 30 fetuses was performed beginning at 18 weeks’ menstrual age. Second-trimester sonographic parameters were measured from three-dimensional volume data […]

Theoretical Study on the Complexes of Benzene with Isoelectronic Nitrogen-Containing Heterocycles
The pi-pi interactions between benzene and the aromatic nitrogen heterocycles pyridine, pyrimidine, 1,3,5-triazine, 1,2,3-triazine, 1,2,4,5-tetrazine, and 1,2,3,4,5-pentazine are systematically investigated. The T-shaped structures of all complexes studied exhibit a contraction of the C–H bond accompanied by a rather large blue shift (40-52 cm(-1)) of its […]