融入思政元素的无机化学实验教学探索

无机化学实验基础化学实验重要的组成部分,但是传统的无机化学实验教学仍然存不足.本文将思政因素融入该课程,从课程设计、课程讲授和课程评价方面进行反思和分析,并提出相应的改进意见和建议.目的是为了提高本校无机化学实验的教学质量,并提高学生的实验操作技能、化学科学素养和创新创造能力,从而达到"立德树人"的教学目的.     

应用型本科院校生物化学课程思政教学模式研究

课程思政是应用型本科院校落实立德树人的重要途径。生物化学是生物技术、生物化工、化学工程、农学类专业的一门专业基础课。本文从课程思政的理念、生物化学课程思政教案设计、课程思政实施、教学方法和考核方式等方面出发,对生物化学课程思政教学进行探索和实践,并将爱国主义、民族自豪感、法律意识、职业道德和科学素养等五方面思政教育融入教学内容。创新生物化学课程思政教学模式、评价方式。通过课程思政教学模式研究有助于实现生物化学课程的思政育人功能。     

基于应用型城市大学建设的制药工程专业分析化学教学改革的探索

以“应用型城市大学”为办学定位,着力“校城融合、开放协同、区域应用”的人才培养特色,因而培养高素质应用型人才是成都大学教育教学改革的重中之重。结合地方优势产业,本文针对应用型城市大学制药工程专业大学生的培养目标以及分析化学的学科特点,在认真践行党的教育方针及政策的基础上,结合自身的教学实践,提出新形势下适合应用型城市大学建设的制药工程专业分析化学教育教学改革的新思路和新方法。     

气化炉磨煤系统提效优化探索

分析煤气化装置磨煤系统在运行中遇到的问题,通过持续改进,降低了系统能耗,提高了装置运行效率,减少了有害气体排放,为保障气化炉高负荷长周期稳定运行提供了保障.     

Fabrication and Characterization of Electrospun Dopants/PS Composite Fibers with Porous and Hollow‐Porous Structures

Three different dopants are used to fabricate electrospun dopants/polystyrene (dopants/PS) composite fibers from PS solution and PS sol. The relative humidity and the influence of the dopants on the morphologies, diameter, porous structures, and dopant distribution of electrospun PS fibers are investigated. Compared to those obtained from PS solution, electrospun dopants/PS composite fibers from PS sol with hollow‐porous and multichannel hollow‐porous structures present significant advantages due to the multi‐stage degree of interfacial structure and diversity of the internal environment. In comparison to coaxial electrospun PS fibers, the electrospun dopants/PS composite fibers from PS sol obtained in one step have an improved yield and a simplified technological process simultaneously, leading to significant competitiveness in fields such as catalysis, fluidics gas storage, and sensing.

     

Acid–base transport model depicting the dynamic pH response of interfacial reactions

Acid–base transport is integral to many important interfacial reactions in various fields of chemistry, but its theoretical foundation is lacked. Herein, a common acid–base transport model is established owing to the success in deriving buffer transport equations. This model is applicable to most buffer systems by flexibly integrating the transport equations in terms of buffer components, and is verified through the model relationships of buffer transport limiting current by using hydrogen evolution reaction experiments. Based on model calculations, two diagram approaches are proposed to depict the dynamic pH response and aid buffer operation optimizations. The model and methods allow us to quantify the rate-limiting effect of acid–base transport on interfacial reactions and to precisely control the effect through medium regulations. Furthermore, the model has laid the foundation of dynamic pH effect on species transformation and process mechanism, which can be of wide interest in the chemistry encompassing interfacial reactions.     

A high-throughput chaotic advection microreactor for preparation of uniform and aggregated barium sulfate nanoparticles

A high-throughput (105.5 g/h) passive four-stage asymmetric oscillating feedback microreactor using chaotic mixing mechanism was developed to prepare aggregated Barium sulfate (BaSO₄) particles of high primary nanoparticle size uniformity. Three-dimensional unsteady simulations showed that chaotic mixing could be induced by three unique secondary flows (i.e., vortex, recirculation, and oscillation), and the fluid oscillation mechanism was examined in detail. Simulations and Villermaux–Dushman experiments indicate that almost complete mixing down to molecular level can be achieved and the prepared BaSO₄ nanoparticles were with narrow primary particle size distribution (PSD) having geometric standard deviation, σ_g, less than 1.43 when the total volumetric flow rate Q_total was larger than 10 ml/min. By selecting Q_total and reactant concentrations, average primary particle size can be controlled from 23 to 109 nm as determined by microscopy. An average size of 26 nm with narrow primary PSD (σ_g = 1.22) could be achieved at Q_total of 160 ml/min.     

Densification of Yttria Transparent Ceramics: The Utilization of Activated Sintering

Highly transparent 0.5 at.% Tm:Y₂O₃ ceramics were prepared by using solid‐state reaction combined with vacuum sintering method, with ZrO₂ and Al₂O₃ as sintering aids. Doping amount of ZrO₂ was fixed at 1 at.%, while the effect of Al₂O₃ on densification, microstructure evolution, and transmittance of the Y₂O₃ ceramics was carefully studied. It was found that the addition of Al₂O₃ was very effective in improving densification of Y₂O₃, due to the formation of an Al‐rich eutectic phase Y₄Al₂O₉ (YAM) during the sintering process. As the content of Al₂O₃ was increased from 0 to 81.8 wt ppm, porosity of the ceramics was decreased and transmittance was increased. However, when the content of Al₂O₃ was increased to 137 wt ppm, a secondary phase began to segregate at grain junctions. Further increase in the amount of Al₂O₃ led to an increase in both amount and size of the secondary phase. At the optimized content of Al₂O₃ with 81.8 wt ppm, the Tm:Y₂O₃ ceramics sintered at 1860°C for 13 h exhibited an in‐line transmittance of 83.0% at 2000 nm and 76.5% at 600 nm. It is expected that this finding can be readily applied to other transparent ceramics.