Results 41 to 50 of about 398,887 (216)
Separation of Sanggenon C from SANG-BAI-PI(从桑白皮中提取药物成分桑根酮C)
Zhejiang Daxue xuebao. Lixue ban, 2001 开发了从中药桑白皮中分离和精制桑根酮C的工艺路线.用紫外光谱、红外光谱、质谱以及核磁共振谱（13C-NMR与1H-NMR）进行结构鉴定，证实其为桑根酮C（Sanggenon C）.
LUXiang-hong(陆向红) +3 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Ti‐15Mo‐2.5Ag alloy exhibited a low modulus and strong antibacterial ability but poor bioactivity. To resolve this problem, sandblasting and anodization were used to create a hydrophilic and nano‐Ag2O‐containing TiO2 coating. Subsequently, the microstructure and physicochemical properties were investigated by scanning electron microscopy, X ...
Yanchun Xie +11 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal nanoclusters provide abundant catalytically active sites and unique electronic structures that are highly beneficial for enhancing photocatalytic performance; however, their practical application is often hindered by poor photostability.
Yiying Qin +6 more
wiley +1 more source
野生动物学报, 2019 利用衰减全反射红外光谱技术，对赛加羚羊等3个物种共49份相关样本进行检测、分析并计算其相关系数，结果：同支羚羊角壳不同取样部位红外光谱相关系数为96.69%—99.43%；不同羚羊角壳相同取样部位红外光谱相关系数为94.24%—99.43%；不同物种角质壳红外光谱相关系数为99.28%—99.47%；羚羊角壳与其骨质芯混合物红外光谱随角骨比例变化，骨质成分越多，其红外光谱与羚羊角壳红外光谱的相关系数越低。由此推断红外光谱因取样部位、个体及物种不同而产生差异，且个体间和取样部位差异甚至大于种间差异 ...
刘闯李超金煜
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Fast‐charging capability is one of the crucial factors determining the application prospects of sodium‐ion batteries (SIBs). Nevertheless, the mismatched sodium storage kinetics and Coulombic efficiency (CE) in hard carbon anodes are bottlenecks in the implementation of fast‐charging SIBs. Herein, we propose a facile pre‐carbonization strategy
Qixin Liu +8 more
wiley +1 more source
Guangtongxin yanjiu, 2012 文章建立了光纤激光频谱组束的体光栅参数优化模型。研究结果表明,随着体光栅空间频率和折射率调制量的增大,体光栅所允许的光束谱宽减小,光束发散角增大,得到空间频率和折射率调制量优化选择参数。文章还对所选取的体光栅参数进行频谱组束的效率进行了分析。研究表明,采用优化参数的体光栅的频谱组束效率可提高至95%以上。
郝粮宁 +3 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The electrocatalytic co‐reduction of CO2 and nitrate (NO3− ${\text{NO}}_{3}^{-}$) to synthesize urea presents a sustainable alternative to traditional industrial processes, yet its efficiency is fundamentally limited by the kinetically mismatched activation and coupling of CO2 and NO3− ${\text{NO}}_{3}^{-}$.
Jiayu Liu +9 more
wiley +1 more source
, 2014 本实用新型涉及一种透射式光栅光谱仪，可以将光分成光谱进行记录和输出。光谱仪包括入射狭缝，准直透镜，光栅，聚焦透镜，反射镜，光电转换装置。光谱仪准直透镜和聚焦透镜的使用采用共光轴光路方式，在较短波长范围内，色差和像差影响小，光谱分辨率高，通光效率高，杂散光少，调节方便，结构稳定。适用于固定激发波长的拉曼光谱测试 ...
黄保坤 +3 more
core
Guangtongxin yanjiu, 1996 介绍了傅立叶交换光萤光谱测试的基本原理；报道了用ＰＬ６１２０设备测得的一些典型的异质结构材料光萤光谱；分析和讨论了光萤光双峰结构、光萤光谱异常温度特性等问题；指出了异质界面上原子排列无序和内应力是造成这些异常现象的物理原因。
丁国庆
doaj
Dual‐Layer Solid Electrolyte Interphase Enables Effective Suppression of Lithium Dendrites
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The heterogeneous solid electrolyte interphase (SEI) at the Li metal anode often leads to slow and uneven Li+ flux, causing severe Li dendrite growth. Herein, we combine X‐ray photoelectron spectroscopy and cryogenic transmission electron microscopy to demonstrate that a dual‐layer SEI, consisting of an inorganic inner layer and an organic ...
Huaping Wang +4 more
wiley +1 more source