Porous Graphene-Like MoS2/Carbon Hierarchies for High-Performance Pseudocapacitive Sodium Storage

Layered MoS2 has been considered as a promising anode material for sodium-ion batteries (SIBs), but which suffers from low electric/ionic conductivity as well as severe volume variation upon ion insertion/extraction,...

Oxygen-tailoring in SiOX/C with a covalent interface for high-performance lithium storage

The oxygen-tailoring projects of silicon suboxide (SiOX) can relieve its volume variation for highly structural integrity and construct a stable solid interface electrolyte (SEI) layer. Herein, we propose and prepare...

Insight on the Sodium Storage Mechanism of Bi2Te3 Nanosheets as a Superior Anode for Sodium-ion Batteries

Although bismuth-based anode materials for sodium-ion batteries (SIBs) are widely attracted, however, the large volume variation hinders the actual applications, especially in the Bi2Te3 system. In this study, the Bi2Te3...

Stroke Volume Variation-Guided Goal-Directed Fluid Therapy Did Not Significantly Reduce the Incidence of Early Postoperative Complications in Elderly Patients Undergoing Minimally Invasive Esophagectomy: A Randomized Controlled Trial

Study Objective: This study aimed to investigate whether stroke volume variation (SVV)-guided goal-directed therapy (GDT) can improve postoperative outcomes in elderly patients undergoing minimally invasive esophagectomy (MIE) compared with conventional care.Design: A prospective, randomized, controlled study.Setting: A single tertiary care center with a study period from November 2017 to December 2018.Patients: Patients over 65 years old who were scheduled for elective MIE.Interventions: The GDT protocol included a baseline fluid supplement of 7 ml/kg/h Ringer's lactate solution and SVV optimization using colloid boluses assessed by pulse-contour analysis (PiCCO™). When SVV exceeded 11%, colloid was infused at a rate of 50 ml per minute; if SVV returned below 9% for at least 2 minutes, then colloid was stopped.Measurements: The primary outcome was the incidence of postoperative complications before discharge, as assessed using a predefined list, including postoperative anastomotic leakage, postoperative hoarseness, postoperative pulmonary complications, chylothorax, myocardial injury, and all-cause mortality.Main Results: Sixty-five patients were included in the analysis. The incidence of postoperative complications between groups was similar (GDT 36.4% vs. control 37.5%, P = 0.92). The total fluid volume was not significantly different between the two groups (2,192 ± 469 vs. 2,201 ± 337 ml, P = 0.92). Compared with those in the control group (n = 32), patients in the GDT group (n = 33) received more colloids intraoperatively (874 ± 369 vs. 270 ± 67 ml, P <0.05) and less crystalloid fluid (1,318 ± 386 vs. 1,937 ± 334 ml, P <0.05).Conclusion: The colloid-based SVV optimization during GDT did not significantly reduce the incidence of early postoperative complications after minimally invasive esophagectomy in elderly patients.Clinical Trial Number and Registry URL: ChiCTR-INR-17013352; http://www.chictr.org.cn/showproj.aspx?proj=22883

Water Resource Management through Understanding of the Water Balance Components: A Case Study of a Sub-Alpine Shallow Lake

Water availability is a crucial factor for the hydrological balance of sub-alpine shallow lakes and for their ecosystems. This is the first study on water balance and water management of Lake Candia, a small sub-alpine, shallow morainic lake. The aims of this paper are to better understand the link between surface water and groundwater. The analyses carried out included: (i) evaluation of water balance, (ii) identification of trends for each component of water balance, (iii) detection of the presence of a break point or change in the behavior of each component, and (iv) regression analyses of the terms of hydrological balance and their relative importance. The analyses revealed a high variability mainly regarding the groundwater component, and very good correlation between rainfall and volume variation, between rainfall and the water inflow, and between groundwater source and outflow. Volume variation is linked with rainfall, outflow, groundwater source, and surface water inflow. Despite the fact that the groundwater component does not seem to have a great importance relative to direct rainfall on the lake, it is necessary to study the component with careful resource management policies that point toward the protection of the water resource, sustainable uses, and protection of the Lake Candia ecosystem.

Assessment of the shaping ability of three systems used in long oval canals

The aim of this study was to analyze volume variation, untouched walls, transportation, and centralization in long oval canals prepared with ProTaper Next (PTN), X File (XF) and X Gray (XG) by microcomputed tomography (micro-CT). Forty-five lower incisors were divided into three groups (PTN, XF and XG) with 15 specimens each, according to the micro-CT pre-instrumentation (PI) analysis. After the use of each instrument new exams were performed. Volume variation and untouched walls data were analyzed by two-way ANOVA, and for the first one, Tukey HSD or Games-Howell tests were applied in the sequence; data of transportation and centralization were compared by Kruskal-Wallis and Mann-Whitney test. The statistical significance was set at p < 0.05. Between thirds, higher wear values were found in the cervical (p <0.001). PI and the instrument X3 (30/.07) differed in all systems (p < 0.05). No significant difference concerning the percentage of untouched walls between the systems occurred (p = 0.836), while the degree of transportation and centralization was similar between then, with p values of 0.531 and 0.155, respectively. However, between thirds, significant difference was found (pc = 0.029), with the middle third presenting superior centralization than the apical (p = 0.010). In conclusion, PTN, XF and XG had similar results in the shaping ability, transportation, and centralization of long oval canals.