Visualization of torn anterior cruciate ligament using 3-dimensional computed tomography

Recently, a remnant-preserving anterior cruciate ligament (ACL) reconstruction technique has been developed. However, the pre-operative condition of remnant ACL is occasionally difficult to evaluate by magnetic resonance imaging. The purpose of this study is to evaluate the accuracy of pre-operative visualization of remnant ACL using three-dimensional computed tomography (3D-CT). The remnant ACL in 25 patients was examined by 3D-CT before ACL reconstruction surgery. Findings on 3D-CT images and arthroscopy were compared. The 3D-CT images were classified into 4 groups: Group A, remnant fibers attached to the posterior cruciate ligament (PCL); Group B, those located between the PCL and the lateral wall; Group C, those attached to the lateral wall; and Group D, no identifiable remnant fibers on the tibial side. These groups were made up of 4, 3, 9 and 9 patients, respectively. Findings on 3D-CT images were identical to those during arthroscopy in 20 of 25 cases (80%). Remnant ACL can be accurately evaluated using 3D-CT in 80% of cases of torn ACL. This novel method is a useful technique for pre-operative assessment of remnant ACL

Enhancement of the functions of the Japan Atomic Energy Agency Library’s Fukushima Nuclear Accident Archive using a novel data flagging system that improves the utilization of numerical data on the Internet

Related to the Fukushima Daiichi Nuclear Power Station Accident, the Japan Atomic Energy Agency Library has accumulated valuable information on Internet. In the Fifteenth International Conference on Grey Literature, we reported the development of the Fukushima Nuclear Accident Archive using the DSpace. We have encountered a new, challenging issue of grey literature. In many cases, Internet information contains valuable numerical data. However, identifying the existence of numerical data on Internet sites is difficult, and the metadata created for the Fukushima Nuclear Accident Archive cannot currently be used to distinguish whether such information contains numeric data. Therefore, we have considered a method to identify numerical data and have introduced a “data flagging” system that has been used in the International Atomic Energy Agency’s International Nuclear Information System. In this paper, we introduce the proposed data flagging system and discuss its application to the Fukushima Nuclear Accident Archive.Includes: Conference preprint, Powerpoint presentation, Abstract and Biographical notesXAInternationa

Direct enantio-convergent transformation of racemic substrates without racemization or symmetrization

Asymmetric reactions that transform racemic mixtures into enantio-enriched products are in high demand, however, classical kinetic resolution (KR) can afford enantiopure compounds in <50% yield even in an ideal case. Many deracemization processes thus have been developed including dynamic kinetic resolution (DKR) and dynamic kinetic asymmetric transformation (DYKAT), which can provide enantio-enriched products even after complete conversion of the racemic starting materials; however, these dynamic processes require racemization or symmetrization of the substrates or intermediates. We demonstrate a first chemical direct enantio-convergent transformation without racemization or symmetrization process. The copper(I)-catalysed asymmetric allylic substitution of a racemic allyl ethers afforded a single enantiomer of an α-chiral allylboronates with complete conversion and high enantioselectivity (up to 98% ee); one enantiomer of the substrate undergoes an anti-SN2'-type reaction whereas the other enantiomer reacts via a syn-SN2' pathway. The products, α-chiral allylboronates, cannot be prepared by dynamic procedures, were used in construction of all-carbon quaternary stereocentres