Results 21 to 30 of about 7,402 (142)
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
Volumetric properties of ions in DMF-water mixtures(离子在DMF-水混合溶剂中的体积性质)
Zhejiang Daxue xuebao. Lixue ban, 2003 利用精密数字密度计测定了298.15 K氯化钾及氯化铵在N,N-二甲基甲酰胺(DMF)-水混合溶剂中的密度,计算了氯化钾及氯化铵的表观摩尔体积和极限偏摩尔体积,得到了相关离子的极限偏摩尔体积和迁移偏摩尔体积.结果表明,当DMF浓度为15%~45%时,K+和的极限偏摩尔体积均表现增加趋势;而Cl的极限偏摩尔体积在同一DMF浓度范围内则表现为逐渐减小.利用溶质溶剂和溶剂-溶剂相互作用对结果进行了讨论.
XULi(许莉), LINRui-sen(林瑞森)
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT NiFe‐based MIL‐55 metal‐organic frameworks (MOFs) face challenges in achieving atomically precise composition and reliable methods for uniform growth. This study addresses these challenges by applying a slow evaporation crystallization technique to crude colloidal MIL‐55 products from hydrothermal synthesis, resulting in highly uniform ...
H. R. Haris +10 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2003 目的 分析精液量、密度、活动率和活力与精浆抗精子抗体 （AsAb）的关系。方法 :间接血凝法测定AsAb。结果 :32 5 3例男性不育就诊者精浆AsAb阳性率为 9.81%。随着精液量、密度、活动率、活力降低 ,AsAb阳性率均明显增加 （P
刘睿智 +6 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2005 近年来人们在激光冷却和捕获原子方面取得了辉煌的成就，对捕获的冷原子团温度、密度的精确测量也成为一个重要的研究课题.在冷原子温度测量中需要在较短时间内（最长不超过几个毫秒）迅速关断俘获冷原子的磁光阱（包括磁场和光场）.作者针对时间飞行法测量冷原子温度对光场和磁场的关断要求，设计并制作了一种简单、实用的可调脉冲延时和脉宽的脉冲发生器，应用其产生的脉冲在较短时间内有效地关断磁场和光场，达到冷原子温度测量的要求.
WUYan(吴艳) +3 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional electrocatalysts is a key challenge for the industrialization of hydrogen production by water electrolysis. In this work, Co‐doped NiS/Ni3S2 heterostructured nanowire arrays (Co–NiS/Ni3S2 NA) were successfully constructed by precisely modulating the phase‐selective behavior of nickel ...
Xing‐Hang Liu +2 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2007 目的探讨季节变化与精子参数、精浆果糖、中性α-糖苷酶的关系。方法采用精子形态检测系统下人工修正方法进行精子形态分析。采用精子质量检测系统进行精子密度、活力分析。精浆果糖含量、中性α-糖苷酶采用分光光度比色法测定。根据季节变化,结合本地实际情况分为四组:3-5月组,6-8月组,9-11月组,12-2月组。结果平均精子密度在3-5月组最高,9-11月组最低,9-11月组精子密度显著低于3-5月组 ...
李付彪 +5 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT A major challenge in fabricating eutectic NiTiNb alloys is the incomplete melting of Nb due to its much higher melting point than the NiTi matrix. In this work, a novel electron‐beam freeform additive manufacturing strategy is developed to eliminate unmelted Nb particles and achieve a fully eutectic structure through independent dual‐wire ...
Qing‐Da Zhang +9 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的探讨久坐时间与IT男性不育患者精液参数异常变化的关系。方法按照《人类精液及精子一宫颈黏液相互作用实验室检验手册》中的标准,将200例IT男性不育患者的精液参数变化与正常对照组进行比较。并根据久坐时间长短,将患者分为4-8小时组和大于8小时组,对精液异常参数进行比较,以进一步探讨久坐时间与精液参数异常指标的相关性。结果与正常对照组比较,200例IT男性不育患者的精液参数发生明显变化 ...
刘福鼎, 卫元璋, 杨曦明
doaj
Giant Tunability of Individual Magnetic Skyrmion Size via an Oscillating Local Magnetic Field
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Magnetic skyrmions hold great promise as memory and computing elements in future spintronic devices. Despite the demonstration of various devices, techniques for addressable and high‐precision manipulation of individual skyrmions remain scarce.
Cai‐Hong Xie +13 more
wiley +1 more source