Density functional theory methods(DFT) and natural bond orbital (NBO) analysis were used to investigate the effects of isomerism and side chain mutation at a microscopic level on the stability, binding energy and NMR/NQR tensors of structural isomers, L- methionylasparagine (Met-Asn) and L- asparagylmethionine (Asn-Met) in the gas phase. The results represented that the isomerism and side chain...

We report the case of a 37-year-old man who suffered from biventricular failure due to left isomerism, inferior vena cava interruption with azygos vein continuation, bilateral superior vena cava, double outlet of right ventricle, complete atrioventricular septal defect, pulmonary stenosis, and isolated dextrocardia. Heart transplantation in patients with systemic venous anomalies often requires...

Revealing structural isomerism in nanoparticles using single-crystal X-ray crystallography remains a largely unresolved task, although it has been theoretically predicted with some experimental clues. Here we report a pair of structural isomers, Au38T and Au38Q, as evidenced using electrospray ionization mass spectrometry, X-ray photoelectron spectroscopy, thermogravimetric analysis and indispu...

A 22 month old male infant with isomerism of the right atrial appendages (associated with a complete atrioventricular septal defect, double outlet right ventricle, and pulmonary valve stenosis) died from pneumococcal septicaemia after a 36 hour illness. He had not been given penicillin prophylaxis. Asplenia was confirmed at necropsy. In a survey of 50 paediatric cardiologists in the United King...

We present an isomerism strategy to study the substitution position of perylene diimides on performances aggregation-induced emission (AIE) and two-photon absorption (2PA). Interestingly, enhanced AIE 2PA have been achieved.

Status Last revised 1993 Previous titles/other references Clinical Investigation of Chiral Active Substances/ III/3501/91 Additional Notes This note for guidance considers active substances with one or more stereogenic centres which display chirality but not constitutional isomerism or cis/trans isomerism. It should be read in conjunction with Directive 65/65/EEC as amended and Directive 75/318...