Prospective observational study about perioperative hemodynamic management and postoperative myocardial and kidney injury in patients undergoing abdominal surgery - Perioperative hemodynamics and postoperative organ dysfunction
Evaluation of effect on the postprandial glucose elevation and glycemic variability of Imeglimin - IMAGINEIMeglimin Amplifies Glucose-stimulated INsulin secretion and modifies glycemic Elevation in type 2 diabetes
We investigated the magnetoresistance and the Hall effect in an organic massless Dirac fermion system α-(BETS)2I3 under pressure. The Fermi energy of this system is slightly far away from the Dirac points, and thus the ν= 1 quantum Hall state is realized in a low magnetic field at low temperatures Moreover, the exptl. formula for chem. potential as a function of temperature is clarified. We succeeded in detecting the inter-band effects of the magnetic field on the Hall conductivity when the chem. potential passes the Dirac points.
2023·Nettowaku Porima Ronbunshu
Modified polyimides for use in flexible printed circuit boards for high-speed data communication
作者: Hasegawa, Masatoshi
As the core technologies to support recent high-capacity and high-speed data communication systems, the importance of flexible printed circuit boards (FPCs) used in mobile communication devices has significantly increased. To obtain FPCs compatible to 5G-communication technologies, novel high-temperature dielec. substrate materials with low dissipation factors (tan δ) at high operating frequencies (≥ 3.6 GHz) are strongly required. This review paper proposes the mol. design for novel heat-resistant dielecs. consisting of modified polyimides, poly(ester imide)s, and exhibits their excellent combined properties, including significantly reduced tan δ values at 10 GHz, extremely low linear coefficients of thermal expansion, suppressed water uptake, and very high glass transition temperatures
Simultaneous quantitative determination of six triterpenoid saponins in Ardisia japonica collected from different regions of China through LC-ESI-MS
Background: The whole plants of Ardisia japonica (Myrsinaceae) are used in traditional Chinese medicine for the treatment of phlegm, cough, jaundice, edema, and bruise, and triterpenoid saponins are the main bioactive components. However, triterpenoid saponins from this plant have not yet been simultaneously quant. determined and reported. Objectives: The present study aimed to establish a fast, simple, and reliable LC-ESI-MS anal. method for simultaneous quantization of the major triterpenoid saponins in A. japonica for the first time. Materials and Methods: Six major triterpenoid saponins from the plant species of Ardisia were selected as the reference compounds Five batches of A. japonica were gathered from five distinct regions of P. R. China. Quant. anal. was developed and validated by LC-ESI-MS in SIM mode. The separation conditions were optimized on a RP C18 Column with ACN and 0.1% FA (volume/volume) at a flow rate of 0.2 mL/min and column temperature of 35°C. Results: The validation investigation found that the anal. method was accurate, recoverable, and sensitive for quantification of the six triterpenoid saponins. All of the calibration curves revealed acceptable linear regression (R2>0.9975). The contents of six triterpenoid saponins in A. japonica from five regions varied considerably. Conclusion: The present study established a highly efficient anal. technique to quantify the triterpenoid saponins in A. japonica, and it could be further applied in the quality control of A. japonica.
Japanese researchers have created a catheter that can navigate by itself through some of the thinnest branches of the bronchi.
Pulmonary lesions are biopsied to diagnose or treat respiratory illnesses like lung cancer. Bronchoscopy is the standard method for manual biopsies.
The bronchi branches into different directions and progressively gets thinner and more difficult to navigate. The propelling movement for catheters and endoscopes during traditional bronchoscopy makes it harder for doctors to reach troublesome lesions with biopsy forceps, which can result in false diagnostics.
Yuichiro Takai, professor in the department of respiratory medicine at Omori Medical Center at Toho University, and Hideyuki Tsukagoshi, a member of the department of system and control engineering at Tokyo Tech, developed a self-propelling catheter that creates traveling waves in multiple chambers by adding and reducing pressure inside a tube.
The catheter moves forward in a peristaltic motion that is similar to the way an earthworm moves. It can move through the small structures of the bronchi and can curve to choose the direction of propulsion. The researchers tested the catheter on a bronchus model.
The researchers hope to increase the accuracy of which way the catheter can be propelled. They also want to fit the catheter with a camera to be able to get information on the inside of the bronchi, create functions used for biopsies and treatment and give instruments a practical use.