The synthesis of hydrocarbons from CO2 and H2O using electricity derived from renewable energy sources has attracted considerable attention. However, there is currently no direct electrochemical method capable of selectively producing specific hydrocarbons from CO2 reduction at low overpotentials. By employing an electrochemical membrane reactor that combines water electrolysis with thermocatalytic methanation, methane can be selectively produced at a cell voltage comparable to that of conventional water electrolysis. In this study, methane synthesis from CO2 and H2O was investigated using an electrochemical membrane reactor equipped with a 30 wt%-Ru/C catalyst, Pd-based alloy membrane, and a NaOH-KOH eutectic electrolyte operating at approximately 250 degrees C. At 250 mA cm-2 based on cathode geometric area and 250 degrees C, the methane and hydrogen production rate was 290 and 120 nmol s-1 cm-2, corresponding to a current efficiency of 91 and 9%, respectively. However, when the current density exceeded 250 mA cm-2, the total current efficiency suddenly deviated significantly from 100%, indicating a decrease in current efficiency due to product cross-leak. At 300 mA cm-2, significant evolution of H2 was detected in the anode-side exhaust gas. This cross-leak was also pronounced during operation below 200 degrees C. Impedance measurements determined that the specific resistance of the electrolyte at 250 degrees C was 0.50 S cm-1. The current efficiency and related characteristics of this methane synthesis method were discussed in detail.
Anticancer therapy for patients with gastric cancer on hemodialysis is challenging owing to varying pharmacokinetics and a lack of clinical trial data. This study aimed to evaluate the efficacy and safety of the capecitabine plus oxaliplatin (CapeOX) regimen in a 73-year-old male Japanese patient with stage IV gastric cancer (human epidermal growth factor receptor 2 negative) undergoing hemodialysis. The selected chemotherapy regimen was approximately 50
Reducing the concentration of carbon dioxide (CO2) in the atmosphere to combat climate change is a global challenge. Direct air capture (DAC) incorporates a new set of technologies that directly remove CO2 from the air; therefore, DAC can address emissions from any source. This paper begins by reviewing the literature on negative emission technologies (NET) to summarize the most recent technological developments. Further, a life cycle assessment (LCA) on one of the most recently developed technologies, the direct air capture and utilization (DAC-U) system is undertaken. DAC-U systems, like photovoltaic systems, can be installed in various locations, including homes, offices, and industrial settings, resulting in a compact, on-site system that may be suitable for modular and distributed deployment. Based on the LCA results, this article presents the CO2 capture and reduction potential of the DAC-U system, with a focus on installations in households, and examines the willingness to adopt the system in Japan. Results demonstrate that DAC-U functions as a NET and, when deployed at the household scale, offers a non-trivial capture and reduction potential within the residential sector.
Minimally invasive liver surgery requires a precise understanding of complex liver anatomy. Extended reality (XR) technologies, including virtual reality and mixed reality, offer promising solutions for enhancing preoperative planning and intraoperative guidance. This study aimed to investigate the effectiveness of XR technology in minimally invasive hepatectomy and compare the outcomes of laparoscopic and robotic approaches. We retrospectively reviewed the clinical records of 102 patients who underwent minimally invasive hepatectomy. Patients were categorized into XR-assisted (n = 47) and without XR (n = 55) groups. The XR group had significantly higher IWATE difficulty scores (median 6 vs. 4, P < 0.001) and a greater proportion of anatomical resections (57.4
This study aimed to identify urinary microRNAs (miRNAs) as non-invasive biomarkers for pure detrusor underactivity (DU) without bladder outlet obstruction (BOO). Based on urodynamic study (UDS), patients were classified into non-BOO DU (n = 4), BOO (n = 4), young healthy control (n = 4), and older healthy control (n = 4) groups. Urinary miRNA profiles were analyzed by microarray to identify non-BOO DU-specific candidates. To validate the non-BOO DU-specific miRNA, RT-qPCR was performed in a validation cohort classified into non-BOO DU (n = 16) and BOO (n = 15, BOO or DU + BOO) groups. Diagnostic performance was assessed by receiver-operating characteristic (ROC) curve analysis, and cutoff values were determined. Clinical parameters were compared between groups stratified by the cutoff value. Microarray analysis identified 28 urinary miRNAs with non-BOO DU-specific patterns in the exploratory cohort; hsa-miR-1273g-3p and hsa-miR-3940-5p were consistently downregulated in the non-BOO DU group in the validation cohort. ROC curve analysis showed an area under the curve (AUC) of 0.804 (95
