基于LabVIEW的DAP单元安全生产仿真系统

磷酸氢二铵（DAP）生产实物操作与实验具有相当的危险性,文中将危险性与可操作性分析（HAZOP）方法与虚拟仪器设计相结合,开发基于LabVIEW的DAP安全生产单元仿真系统,通过生产中关键参数偏差超限的监测报警,显示该超限的原因分析、后果预测、预防应对措施,实现单元安全生产仿真、为DAP的安全生产与设备维护提供指导。     

ZASP玻璃荧光体的激发波长依赖性及Dy3＋掺杂的荧光色彩调谐

采用熔融法制备了锌铝锑磷酸盐(ZASP)玻璃荧光 体,研究了其荧光色彩对激发波长的依赖性和Dy³⁺掺杂的色彩调谐作用。短波紫外(U VC)和中波紫外(UVB)激发下,ZASP基质玻璃 呈现Sb³⁺的宽谱带发射,色彩位于蓝白光和蓝光区域。差异性光谱行为表明,玻璃中 存在异质 性的Sb³⁺发光中心,导致玻璃荧光对激发波长产生依赖行为。Dy³⁺引入ZASP玻 璃后,产生归属 于Dy³⁺的约484nm波长窄带发 射,其在UVC和UVB激发下的发光有效性相当程度上归因于Sb ³⁺到Dy³⁺的能量传递。Dy³⁺的暖色成分使ZASP玻璃荧光总体上从蓝白区 向白光区移动,同时 也对荧光的激发波长依赖趋势产生显著影响,丰富了荧光发射色彩的多样性,为高质量荧光 器件的研发提供了可能。     

钕磷酸盐激光玻璃中金属铂颗粒的产生与迁移

给出了钕磷酸盐激光玻璃中可能存在的铂磷酸盐、偏磷酸盐化合物的热力学参数.利用这些参数,研究了激光玻璃熔制过程中可能发生的液-固、气-固、气-液等化学反应的方向和限度,分析了玻璃中金属铂颗粒的可能来源、存在方式及迁移过程.结合实验讨论了铂的产生及迁移、最佳除铂工艺途径和钕磷酸盐激光玻璃的除铂机理.     

Insights into the In Vitro Formation of Apatite from Mg-Stabilized Amorphous Calcium Carbonate

A protein-free formation of bone-like apatite from amorphous precursors through ball-milling is reported. Mg²⁺ ions are crucial to achieve full amorphization of CaCO₃. Mg²⁺ incorporation generates defects which strongly retard a recrystallization of ball-milled Mg-doped amorphous calcium carbonate (BM-aMCC), which promotes the growth of osteoblastic and endothelial cells in simulated body fluid and has no effect on endothelial cell gene expression. Ex situ snapshots of the processes revealed the reaction mechanisms. For low Mg contents (<30%) a two phase system consisting of Mg-doped amorphous calcium carbonate (ACC) and calcite “impurities” was formed. For high (>40%) Mg²⁺ contents, BM-aMCC follows a different crystallization path via magnesian calcite and monohydrocalcite to aragonite. While pure ACC crystallizes rapidly to calcite in aqueous media, Mg-doped ACC forms in the presence of phosphate ions bone-like hydroxycarbonate apatite (dahllite), a carbonate apatite with carbonate substitution in both type A (OH⁻) and type B (PO₄³⁻) sites, which grows on calcite “impurities” via heterogeneous nucleation. This process produces an endotoxin-free material and makes BM-aMCC an excellent “ion storage buffer” that promotes cell growth by stimulating cell viability and metabolism with promising applications in the treatment of bone defects and bone degenerative diseases.     

通信系统磷酸铁锂电池规模应用可行性分析

本实验在基站实际工作环境下的测试,通过本次试验数据的对比分析,研究磷酸铁锂电池在通信行业中应用的可行性、适应性,并找到在通信行业中使用的最佳控制方案。     

对NpHR光敏感蛋白具有刺激作用的光电极研制

光电极是研究光遗传学不可或缺的工具之一。波长为460nm的蓝光可以对ChR2神经蛋白产生刺激,而波长为580nm的黄光可以刺激NpHR神经蛋白,对生物体的反应产生抑制。目前,蓝光波段的光电极具有很高的功率密度,可以满足光遗传学的研究,而黄光波段半导体发光器件的发光效率较低,因此对黄光波段的光电极研究较少。在蓝宝石衬底蓝光光电极研制的基础上,通过激发黄色荧光粉和量子点两种形式获得黄光,并通过沉积SiO2/TiO2分布式布拉格反射镜（DBR）有效滤除了蓝光波段的激发光,最后通过沉积Ag金属反射镜增强黄光信号,制备出荧光粉基和量子点基黄光光电极。与荧光粉基黄光光电极相比,量子点基黄光光电极具有更高的功率密度、更窄的光谱半宽和更薄的厚度。在1～10mA的注入电流下,量子点基黄光光电极的功率密度为4.46～15.37mW/mm2,满足刺激NpHR神经蛋白的要求。     

对扫描电镜观察微生物样品出现磷酸盐结晶现象的改良

制备常规扫描电镜生物样品时,通常使用磷酸缓冲液来进行漂洗,其结果是容易产生结晶,沉积在样品表面.针对微生物具有坚韧的细胞壁的特性,作者使用去离子水替代磷酸缓冲液来漂洗固定液.结果显示,扫描电镜下样品形态完好,无磷酸盐结晶,提高了样品制备的成功率.     

A Dilute Fluorinated Phosphate Electrolyte Enables 4.9 V-Class Potassium Ion Full Batteries

Potassium ion batteries using graphite anode and high-voltage cathodes are considered to be optimizing candidates for large-scale energy storage. However, the lack of suitable electrolytes significantly hinders the development of high-voltage potassium ion batteries. Herein, a dilute (0.8 m ) fluorinated phosphate electrolyte is proposed, which exhibits extraordinary compatibility with both graphite anode and high-voltage cathodes. The phosphate solvent, tris(2,2,2-trifluoroethyl) phosphate (TFP), has weak solvating ability, which not only allows the formation of robust anion-derived solid electrolyte interphase on graphite anode but also effectively suppresses the corrosion of Al current collector at high voltage. Meanwhile, the high oxidative stability of fluorinated TFP solvent enables stable ultrahigh-voltage (4.95 V) cycling of a potassium vanadium fluorophosphate (KVPO₄F) cathode. Using TFP-based electrolyte, the 4.9 V-class potassium ion full cell based on graphite anode and KVPO₄F cathode shows rather remarkable cycling performance with a high capacity retention of 87.2% after 200 cycles. This study provides a route to develop dilute electrolytes for high-voltage potassium ion batteries, by utilizing solvents with both weak solvating ability and high oxidative stability.     

Elevating Biomedical Performance of ZnO/SiO2@Amorphous Calcium Phosphate ‐ Bioinspiration Making Possible the Impossible

Here a biomimetic approach is presented to fabricate nanodragon fruits featured by a multitude of tiny quantum dot ZnO seeds embedded in mesosilica (SiO₂) flesh then enclosed in amorphous calcium phosphate (ACP) shell. The nanodragon fruits give rise to a new class of hybrid ZnO/SiO₂@ACP nanocomplex with multimoidal capability: cellular delivering, intracellular targeting, and subcellular imaging. With this particular design, the unusual fluorescent stability of ZnO quantum dots (QDs) in aqueous solution, the specific color selection of the functional ZnO QD seeds, and the stability of transient ACP over a long period of time are made possible. In addition, the nanodragon fruits, capable of targeting mitochondria, have elevated biocompatibility, thus can be of enormous potential applications in treating mitochondrial diseases including inflammation, neurodegeneration, obesity, diabetes, cardiovascular diseases, and cancer. As numerous human disorders are often associated with cellular dysfunctions, this biocompatible carrying platform, capable of delivering, targeting, and imaging subcellular organelles, is therefore highly desirable for efficacious therapeutic and diagnostic treatment.     

灾后混凝土工程快速修补材料的研究

为了确定磷酸盐胶凝材料(MPB)的最佳配合比,研究调凝组份、磷酸盐/MgO(w(P)/w(M))、灰砂比、掺粉煤灰对MPB胶凝材料凝结时间和强度发展等的影响规律,并分析它与传统水泥混凝土间的兼容性及其硬化机理.结果表明:当调凝组份掺量为10%左右时,可使MPB水泥凝结时间控制在15～30 min内.当w(P):w(M)为1:2时,MPB水泥浆体的强度达到最高值,3 h抗压强度可达到40 MPa以上,1 d时强度超过50 MPa.灰砂比(w(MPB):w(S))为1:1.5时,砂浆强度达到最高值,3 h抗压强度达到50 MPa,抗折强度达到9.1 MPa.在保持流动度不变情况下,掺粉煤灰并不降低MPB胶凝材料强度,并可使其颜色与普通水泥混凝土接近.MPB遇水后生成以MgNH_4PO_4·6H_2O为主的反应产物,它与传统水泥混凝土间具有很好兼容性,因而适合于灾后混凝土工程的快速修复.