Results 61 to 70 of about 10,828 (166)
Fushe yanjiu yu fushe gongyi xuebao本研究以沅江芦笋加工副产物笋壳为原料，探讨了脱盐处理、辐照处理和有机酸催化对其水热制备低聚木糖的影响，并以低聚木糖转化率为指标、浸泡脱盐3次沅江芦笋笋壳为原料、乙酸浓度（v/v）、吸收剂量、水热处理温度和时间为因素，开展四因素三水平的正交实验优化低聚木糖的制备工艺。实验结果表明：浸泡脱盐3次能够将沅江芦笋笋壳食盐含量降低至1.48%，木聚糖含量提高至17.34%，经180 ℃水热处理30 min，低聚木糖转化率达55.18%。正交试验优化获得低聚木糖的制备工艺为：乙酸浓度0.2%（v/v ...
吴 颂娜 +9 more
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Studies on Preparation and Properties of Lu3Al5O12: Ce3+, Er3+ Green Phosphors for White Light Emitting Diode [PDF]
, 2015 随着科学的进步，白光发光二极管（lightemittingdiode，简称LED）因其环保、节能、体积小、寿命长等优点被公认为第4代固体光源，广泛应用于屏幕显示、电子产品背光源和普通照明等领域。荧光粉转换法制备白光LED是一种成本低、综合性能好、易于实现的方法。目前，已商业化的白光LED是由蓝光氮化镓（GaN:In）芯片组合YAG:Ce3+黄色荧光粉所实现的，因其缺少红色成分致使显色指数不高。因此考虑用蓝光芯片配合红色和绿色荧光粉来得到需要的白光。为提高白光LED的显色指数和发光效率 ...
余艳平
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian +7 more
wiley +1 more source
Rheological Properties of Polycarbosilane at Molten State [PDF]
, 2014 聚碳硅烷（PCS）是制备碳化硅基陶瓷及纤维的重要先驱体，熔融纺丝是制备碳化硅陶瓷纤维的关键步骤，掌握PCS在加工温度（熔融状态）下的流变性能至关重要。但是，PCS具有分子量低、分子结构复杂和对外界环境敏感等特点，其熔融状态下的流变性能至今仍不清楚，目前主要是通过经验性的方法来选择PCS熔融纺丝的工艺条件，缺乏理论依据和科学基础。因此，本论文着重研究加工温度（熔融状态）下PCS的流变性能，结合分子结构的分析，探讨微结构和流变性能的关系。 通过热处理PCS原料，得到一系列PCS样品 ...
陈惠贞
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Platinum (Pt)‐based catalysts are crucial for the commercialization of hydrogen/metal air batteries, but they suffer from Pt scarcity, high cost, and nanoparticle dissolution/agglomeration, mainly leading to performance degradation. We address this by synthesizing a PtFe alloy catalyst (PtFe–PA–NC) via a phytic acid (PA) assisted pyrolysis ...
Chenyang Shu +9 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2002 【目的】热刺激预处理诱导热休克蛋白表达, 观察它对复极化诱导的小脑颗粒神经元凋亡是否具有保护作用。 【方法】热刺激处理诱导热休克蛋白产生, 复极化诱导体外培养的小脑颗粒神经元凋亡, FDA 荧光染色计算细胞存活率, 相差 显微镜分析细胞形态, Hoechst 33258 染色分析核形态, 琼脂糖凝胶电泳分析DNA 片段, Western blo tting 检测HSP70表达。【结 果】小脑颗粒神经元在去极化条件(25 mmol/ L KCl)下生长良好, 复极化(5 mmol/ L KCl ...
陈丽君 +5 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang +5 more
wiley +1 more source
Gaoya dianqi, 2007 金属化膜电容器的优点是储能密度高、可靠性高及成本低,其自愈特性和端部通流能力与层间压强有关。笔者用理论方法计算了层间压强,并根据液体表面产生附加压强原理,分析和计算了金属化膜电容器热处理前后层间压强的变化。计算结果表明,电容器的层间压强是由里向外是递减的,经热处理后的压强是热处理前压强的3倍以上。
孔中华 +4 more
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Shuitu Baochi Xuebao, 2021 为明确秋耕对季节性冻融土壤热状况的调控作用，对比分析了翻耕（FG）、免耕（MG）、垄沟（LG）、翻耕活性炭覆盖（FH）和翻耕秸秆覆盖（FJ）5种处理对土壤温度、冻融循环以及土壤温度梯度等影响的差异。结果表明：与传统FG处理相比，MG、LG、FH、FJ处理均减弱了土壤温度与气温的相关性，降低了整个冻融期土壤温度的升、降温幅度和不同冻融阶段土壤温度昼夜变化的变异性程度，维持土壤温度序列稳定的能力FJ>FH>LG>MG。FG处理最先冻结和融化，其余处理延缓土壤冻结和融化速度的效果为FJ>FH>LG>MG ...
孙开, 王春霞, 蓝明菊, 梁飞
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