The efficient conversion of plastic wastes into high-value carbon materials is promising to turn wastes into treasures, and alleviate the environmental and energy crisis. Herein, the high-entropy oxide of AlMnFeCoNiO was prepared by the co-precipitation method with the calcination temperature of 450-850 degrees C, and used for carbon nanotubes (CNTs) synthesis from polyethylene (PE), polypropylene (PP), polystyrene (PS) and real plastic wastes (RPW). It was found AlMnFeCoNiO with a calcination temperature of 850 degrees C exhibited the best activity and wide applicability in the synthesis of CNTs, and the yield of CNTs per gram of catalyst was 889.3 mg/g, 561.8 mg/g, 788.6 mg/g, and 650.5 mg/g for PE, PP, PS and RPW, respectively. The specific capacitance of AlMnFeCoNiO/CNTs composite (77 F/g) was higher than that of pristine AlMnFeCoNiO (33 F/g), and the charge transfer resistance of AlMnFeCoNiO/CNTs was lower than that of pristine AlMnFeCoNiO. It was concluded that the obtained CNTs had excellent electrical conductivity and enhanced the charge transfer and energy storage capability of AlMnFeCoNiO/CNTs.

The key challenge for the use of polymer electrolytes is to realize a high ionic conductivity without scarifying their mechanical performance. Herein, we re- port a facile strategy to prepare a nanostructured polymer electrolyte with both high proton conductivity and high modulus, based on the electrostatic self-assembly of polyoxometalate cluster H3PW12O40 (PW) and comb copolymer poly(ether-ether-ketone)-grafted-poly(vinyl pyrrolidone) (PEEK-g-PVP). The incorporation of protonic acid PW can enable the PEEK-g-PVP to be highly proton conductive and create flexible composite electrolyte membranes. Moreover, nanoscale phase separation between PEEK domains and PVP/PW domains spontaneously occurs in these membranes, forming a bicontinuous structure with three-dimensional (3D)-connected PW networks. Due to the dual role of PW networks as both proton transport pathways and mechanical enhancers, these membranes exhibit proton conductivities higher than 30 mS cm(-1) and modulus over 4 GPa. Notably, the direct methanol fuel cells equipped with these membranes show good cell performance. Given the wide tunability of comb copolymers and polyoxometalates, this system can be extended to develop a variety of functional electrolyte materials, for example, the lithium-ion conductive electrolytes by using polyoxometalate- based lithium salts, which provides a promising plat- form to explore versatile electrolyte materials for energy and electronic applications.

3D confined assembly in emulsion droplets is an effective way to prepare block copolymer particles with tunable nanostructures. In this process, the multi-component interaction at the droplet interface plays a crucial role, which is mainly dominated by surfactants. Here, we report the utilization of a polymer surfactant, ammonium-terminated polystyrene chains (N–PSn), to control the 3D confined assembly of poly(styrene-block-2-vinylpyridine) (PS-b-P2VP). N–PSn shows a different interfacial tuning ability from small molecular surfactants, which can not only stabilize the emulsion droplets but also increase the volume fraction of PS components through fusing its PS chains with PS-b-P2VP. Consequently, unusual nanostructured PS-b-P2VP particles were obtained based on a binary surfactant system of N–PSn and poly(vinyl alcohol), e.g., the rarely reported toroid-stacked ellipsoidal particles. The morphological formation mechanism was systemically studied by regulating the molecular weight of N–PSn. These results provide a new surfactant platform to tune the confined assembly of block copolymers.

目的:探讨每日唤醒加音乐疗法对重症肺炎机械通气患者谵妄的影响.方法:选取130例在吉林大学第一医院从2016年1月至2018年1月期间诊治的重症肺炎机械通气患者作研究对象,依据摸球法随机分组:对照组(n=65)采取常规护理模式,研究组(n=65)则在常规护理基础上加用每日唤醒、音乐疗法,比较2组患者谵妄发生率、睡眠质量以及免疫功能变化差异.结果:研究组患者谵妄发生率、护理后PSQI量表评分均低于对照组,该组CD4+ CD25+ Treg指标高于对照组(均P＜0.05).结论:每日唤醒加音乐疗法用于重症肺炎机械通气患者临床护理中效果突出,可有效降低谵妄发生率,并提高其睡眠质量,增强其免疫功能.

Droplet-confined assembly is a powerful tool to fabricate functional nanostructures of block copolymers (BCPs), where the interfacial interaction plays a crucial role. Here, we report an unconventional strategy of using interfacial phase separation to control this assembly. The key lies in the use of an elaborately designed binary surfactant system to tune the interfacial configuration of droplets and realize an asymmetrically directed assembly of BCPs inside droplets, which finally creates unprecedented Janus onion particles with solid surfactantlike properties, e.g., as stabilizers for Pickering emulsions. The formation of Janus onions is due to the strong longitudinal selective interaction and the strong lateral phase separation at the droplet interfaces, provided by our surfactant system. This concept of interfacial phase separation directed assembly not only enriches the routes to controllable assembly of BCPs, but also offers an innovative paradigm to construct distinct regions on droplet surfaces, illuminating potential functions such as smart encapsulation and delivery.

目的:分析心理护理联合特殊护理在老年冠心病合并焦虑症患者中的应用价值.方法:分层抽样法抽取我院近两年收治的110例老年冠心病合并焦虑症患者进行前瞻性对照研究,摸球法分为对照组(n=55,接受常规治疗与护理)、研究组(在对照组基础上实施心理护理及特殊护理),比较患者干预前后疼痛、情绪、心率变异性以及生活质量变化情况.结果:干预前,两组西雅图心绞痛量表(SAQ)评分、焦虑自评量表(SAS)以及心血管病人生活质量评定问卷(CQQC)评分比较,差异无统计学意义(P＞0.05);干预后,研究组SAQ、CQQC评分高于对照组,SAS评分低于对照组且护理前后差值有统计学意义(P＜0.05);干预前,两组心率变异性指标(SDNN、rMSSD、PNN50)比较无统计学意义(P＞0.05),干预后,研究组各指标明显优于对照组,差异有统计学意义,两组护理前后差值有统计学意义(P＜0.05).结论:心理护理联合特殊护理能够疏导老年冠心病合并焦虑症患者负性情绪,纠正偏执人格,减轻疼痛,提高患者生活质量,预防心脏意外事件的发生.

该文首先简述微课和图式理论视域下的教学模式的基本情况,深入分析这两者的基本特征,以两者相互深度交叉与融合为目标,适应互联网时代的新需求,构建以“微课”为主要载体,以“图式理论”为指导,以减少语言磨蚀为目的,以促进“语言习得”为目标的新微课教学模式.通过理论解读、教学对策研究,以及教学实践与实验,发现英语微课教学能够强化语言学习,能够达到抗语言磨蚀效果,并能提高英语学习成绩.教学模式的提出与实践将进一步推进图式认知理论、语言磨蚀、信息技术、互联网技术与大学英语教学改革的深度融合,顺应互联网时代的需要,为深化大学英语教学模式创新提供借鉴.

In this paper, long afterglow luminescent materials CaAl2O4:Eu2+, Nd3+ and SrAl2O4:Eu2+, Dy3+ were successfully synthesized by high temperature solid state reaction using the alumina extracted from oil shale ash. The properties of samples were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF) photoluminescence (PL) spectra, thermoluminescent (TL) curve, long afterglow material optical test system. CaAl2O4:Eu2+, Nd3+ and SrAl2O4:Eu2+, Dy3+ prepared with alumina extracted from oil shale ash showed persistent phosphorescence in blue (440 nm) and green (515 nm) with persistence time over 10 h for the blue and 8 h for the green. This result indicates that the alumina extracted from oil shale ash can be used to prepare fluorescent materials. This reuse can not only utilize the oil shale ash rationally but also substantially increased the added-value of oil shale ash. (C) 2017 Elsevier B.V. All rights reserved.

Different morphologies of LuVO4 have been synthesized using tartaric acid, and phosphors with colorful emissions were obtained by Ln3+ doping.

This study used a consensual qualitative research method to explore academic adaptation experiences of international students (N = 13) from East Asia countries at a U.S. university. The analysis yielded five domains from the data (challenges, feelings, strategies, suggestions, and self-reflections). Implications for college counselors, university administrators, and future research are discussed.

BaLuF5:Ce,Tb,Eu(Sm) submicrospheres were synthesized via an ILs/ethylene glycol(EG) two-phase system. The crystalline phase, size, morphology, and luminescence properties were characterized using powder X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra. The results show that 1-methyl-3-octylimidazolium hexafluorophosphate ([Omim]PF6) was used as fluoride source and capping agent to tune morphology and size of the crystals. The formation mechanism has been supposed. Under the excitation of ultraviolet, the BaLuF5:5%Ce3+,5%Tb3+, BaLuF5:Eu3+, and BaLuF5:5%Ce3+,5%Sm3+ exhibit green and red emission, which was derived from Tb3+, Eu3+, and Sm3+ emission. When codoping Ce3+, Tb3+, Sm3+ or Eu3+ together, multi-color emission can be realized. Furthermore, this synthetic route may have potential applications for fabricating other lanthanide fluorides.

A facile and electrostatically driven approach has been developed to prepare bicontinuous polymer nanocomposites that is based on the polyoxometalate (POM) macroion induced phase transition of PS-b-P2VP from an initial lamellar phase to a stable bicontinuous phase. The multi-charged POMs can electrostatically cross-link P2VP blocks and give rise to bicontinuous phases in which the POM hybrid conductive domains occupy a large volume fraction of more than 50 %. Furthermore, the POMs can give rise to high proton conductivity and serve as nanoenhancers, endowing the bicontinuous nanocomposites with a conductivity of 0.1 mS cm-1 and a Young's modulus of 7.4 GPa at room temperature; these values are greater than those of pristine PS-b-P2VP by two orders of magnitude and a factor of 1.8, respectively. This approach can provide a new concept based on electrostatic control to design functional bicontinuous polymer materials.

LuVO4:Eu3+ nano/microcrystals with different morphologies/sizes including nanoparticles, nanosheets, nanodisks, nanoquadrangles, sub-microflakes, microspheres, and bulks were successfully synthesized by a mild solvothermal process using tartaric acid (TA) as the template. The amount of tartaric acid (TA) and the initial pH value play vital roles in controlling the morphologies of LuVO4 products. Besides, the reaction temperature was responsible for the generation of pure LuVO4 crystals in the presence of TA. Based on this, the possible formation mechanism of multi-morphologies was proposed. Furthermore, the dependence of luminescence performance on morphology has been discussed in detail. The LuVO4:Ln(3+) (Ln = Tm3+, Er3+, Sm3+, Eu3+) nanoparticles show the characterized transition of Ln(3+) and give bright blue, green, orange-red and red emission. Moreover, blue-green, green-yellow, pink, yellow-pink and white light can be obtained by adjusting the amount of doped Ln(3+) ions and the corresponding concentrations of the LuVO4 host. This general and simple method may be of much significance in the synthesis of many other rare earth inorganic materials.

A series of color-tunable emitting LuVO4:Tm3+,Dy3+,Eu3+ microspheres were successfully synthesized by a solvothermal process. The structure was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results revealed that the sample is pure tetragonal phase of LuVO4 and consists of 3D-hierachical microspheres with the diameter about 2 mu m. Additionally, the possible formation mechanism of microspheres was proposed. Furthermore, the photoluminescence properties of LuVO4:Dy3+,Eu3+ samples were investigated in detail. Both blue and yellow emissions corresponding to the F-4(9/2)-H-6(15/2), F-4(9/2) -H-6(13/2) transition of Dy3+ ions and red emission corresponding to the D-5(0)-F-7(J) (J = 1, 2, 3, 4) transition of Eu3+ ions can be observed in LuVO4:Dy3+,Eu3+ phosphors under 366 nm near-ultraviole tradiation. The energy transfer process between Dy3+ and Eu3+ was demonstrated to be resonant type via dipole-quadrupole mechanism. Additionally, when co-doping Dy3+ with Tm3+ or Eu3+ or tri-doping Tm3+,Dy3+,Eu3+ ions in the single component, the colorful emitting can be obtained by giving abundant blue, green, red, yellow, orange, especially white-light-emission. This type of color-tunable luminescence phosphors may have promising application in solid state lighting application. (C) 2016 Elsevier B.V. All rights reserved.