Terahertz parametric detection using a lithium tantalate.

Terahertz (THz) parametric detection is a highly sensitive method that upconverts a THz wave into a near-infrared beam for detection. Lithium niobate has primarily been used as the nonlinear optical crystal in this approach. However, the frequency band with high parametric gain is limited, leading to increasing interest in other nonlinear optical crystals.

Temporal changes of tibial eminence after bi-cruciate retaining total knee arthroplasty.

Background: Bicruciate-retaining (BCR) prostheses have been introduced to recreate normal knee movements by preserving both the anterior and posterior cruciate ligaments. One of the surgical procedures essential to the success of BCR total knee arthroplasty (TKA) is preservation of the tibial eminence. However, in our clinical experience, we found that a well-preserved tibial eminence changed its shape chronologically after the operation.

Safety and Efficacy of Selexipag for Pediatric Pulmonary Arterial Hypertension in Japanese Patients - An Open-Label Phase 2 Study.

Background: Selexipag, an oral prostacyclin (PGI) receptor agonist, is approved for adult patients with pulmonary arterial hypertension (PAH). This study evaluated the efficacy and safety of selexipag for Japanese pediatric patients with PAH.

Methods And Results: The study enrolled 6 patients who received selexipag twice daily at an individualized dose based on body weight; maintenance doses were determined for each patient by 12 weeks after starting administration.

Surface Oxygen Vacancies on Copper-Doped Titanium Dioxide for Photocatalytic Nitrate-to-Ammonia Reduction.

Photocatalytic transformation of nitrate (NO) in wastewater into ammonia (NH) is a challenge in the detoxification and recycling of limited nitrogen resources. In particular, previously reported photocatalysts cannot promote the reaction using water as an electron donor. Herein, we report that copper-doped titanium dioxide (Cu-TiO) powders, prepared via the sol-gel method and subsequent calcination, promote NO-to-NH reduction in water.

Influence of Axial Rotation Between the Femoral Neck and Ankle Joint on Kinematics in Normal Knees: A Cross-Sectional Study.

Background: The effect of axial rotation between the femoral neck and ankle joint (total rotation [TR]) on normal knees is unknown. Therefore, this study aimed to investigate the TR effect on normal knee kinematics.

Methods: Volunteers were divided into groups large (L), intermediate (I), and small (S), using hierarchical cluster analysis based on TR in the standing position.