A Borenium-Borane Composite for Exhaustive Reduction of Oxo-Chemicals.

Borenium ions have attracted significant attention in organic transformations due to their strong Lewis acidity. The reported borenium ions are often stabilized by sterically demanding substituents and strong coordination bonds. Herein, we have synthesized a small steric borenium-equivalent NHBHOTf and subjected it to the exhaustive reduction of a carboxylic functional group to a methyl group, which shows broad functional group tolerance.

Novel fast FFR derived from coronary CT angiography based on static first-pass algorithm: a comparison study.

Background: Fractional flow reserve (FFR) is the invasive gold standard for evaluating coronary arterial stenosis. However, there have been a few non-invasive methods such as computational fluid dynamics FFR (CFD-FFR) with coronary CT angiography (CCTA) images that can perform FFR assessment. This study aims to develop a new method based on the principle of static first-pass of CT perfusion imaging technique (SF-FFR) and evaluate the efficacy in direct comparisons between CFD-FFR and the invasive FFR.

Study on the cephalopelvic relationship with cephalic presentation in nulliparous full-term Chinese pregnant women by MRI with three-dimensional reconstruction.

Purpose: To analyze the relationship between fetal head size and maternal pelvis size using magnetic resonance imaging (MRI) with a 3-D reconstruction technique.

Methods: A total of 301 nulliparous full-term Chinese pregnant women with cephalic presentation were enrolled and received MRI examinations before labor onset. Data were collected and imported into Mimics software to reconstruct the maternal pelvis and fetus.

[Association of the CYP1B1 gene polymorphism with susceptibility to endometriosis].

Objective: To study the association between gene polymorphisms of cytochrome P450 1B1 (CYP1B1) in exon 2 codon 119 (G-T) and exon 3 codon 432 (C-G) and the susceptibility to endometriosis.

Methods: Allele-specific polymerase chain reaction was used to analyze the gene polymorphisms in 55 cases of endometriosis and 45 cases of normal controls.

Results: The frequencies of alleles G and T in codon 119 G/T of CYP1B1 gene showed a significant difference between the endometriosis group and the control group (P<0.