Results 101 to 110 of about 32,077 (249)
野生动物学报, 2020 为了确定从酒泉市某养殖场北极狐（Alopex lagopus）肠道分离蛔虫的种类，本次研究通过形态学和分子生物学方法对分离的虫株进行鉴定。在对6条分离于北极狐小肠蛔虫进行形态学鉴定的基础上，应用PCR技术对分离株的线粒体cox1基因部分序列进行扩增、测序与分析。形态学鉴定结果表明6条蛔虫与弓首蛔虫形态学特征基本一致；测序结果显示，6个虫株cox1基因序列大小为418 bp，其序列同源性为994%—1000%，与GenBank收录的狮弓蛔虫分离株同源性最高，为994%—997 ...
张建明
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Dispersive Behaviour of Dual-Petrov-Galerkin Methods for the One-way Wave Equation Comparing with High Order Finite Element Schemes [PDF]
, 2016 MarkAinsworth(2014)曾针对单向流方程，利用高阶有限元方法构造离散波，考察它对于同速情况下的物理波的估计效果。文章不仅给出了详细的分析过程，更是得到了估计相应Floquet因子的相对误差的显性表达式，同时，将其与间断Galerkin方法下的相对误差结果进行了对比。然而，事实证明，无论是高阶有限元方法，还是间断Galerkin方法，它们的估计效果都是具有奇偶特性的。即是说，在多项式阶数为奇数和为偶数时，Floquet因子的相对误差具有不同的表达式，进一步来说，当多项式阶数不断增大时 ...
居文瑜
core
Rare Metals, EarlyView.ABSTRACT High‐power piezoelectric ceramics which have a wide operating temperature range are essential for sensor and actuator applications in extreme conditions. However, their development is fundamentally hindered by the inherent trade‐off among key parameters (TC, d33, Qm).
Rui Yan +10 more
wiley +1 more source
General Formulae of MCF of Labor-Income Taxation [PDF]
, 2000 任意の税率の限界的上昇に伴う厚生損失の変化分を税収の増加額で割った値を，公共資金の限界費用(marginal cost of public funds :MCF)という。ここでは，労働所得税にかかるMCFを正確に導出し，その一般型を定義する。まず第1節では，労働所得にかかる限界税率の上昇がもたらすMCFを、Browning(1987)に基づき定式化する。第2節では， Snow-Warren (1996)のモデルにおいて労働所得税の限界税率の上昇が労働供給(余暇)を減ら(増や)し ...
Kamakari Kohji +3 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Photocatalytic hydrogen production from water splitting is a promising strategy for sustainable and clean energy generation. However, the design of low‐cost, highly active photocatalysts remains a critical challenge. In this study, covalent organic frameworks (COFs) were loaded onto the surface of Cd0.9Cu0.1S to fabricate COF/Cd0.9Cu0.1S ...
Yue Zhao +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2008 目的通过建立大鼠骨髓间充质干细胞（MSCs）的体外分离培养方法,探讨大鼠MSCs表型特征以及多向分化潜能。方法利用密度梯度离心法结合贴壁培养法分离纯化SD大鼠骨髓MSCs,传代扩增,进行形态学观察,测定生长曲线。免疫细胞组织化学及流式细胞分析检测细胞表面分子的表达。定向诱导MSCs向脂肪细胞、成骨细胞及软骨细胞分化。结果原代分离的MSCs在接种后48 h贴壁,细胞形态为椭圆形,多角形及短梭形,12天时细胞呈长梭形并达到90%单层融合。经传代扩增,细胞进一步纯化,细胞形态为均一的长梭形并呈漩涡状排列 ...
王刚, 吕同德, 马静, 常雅萍
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Rare Metals, EarlyView.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
Rare Metals, EarlyView.ABSTRACT The growing concern over human health issues, driven by increasingly severe electromagnetic pollution from 5G communication, has made the urgent development of high‐performance electromagnetic wave (EMW) absorbing materials. Although carbide‐based materials are promising because of their conductive and polarization losses, existing single ...
Chenqiang Duan +9 more
wiley +1 more source
Wildlife Letters, EarlyView.Eimeria saudiensis represents a genus of apicomplexan parasites capable of inducing coccidiosis in Arabian oryx. Our research concentrated on the morphological and molecular investigation of Eimeria spp. in the captive oryx herd in Oman. The therapeutic and management practices employed at the Mammals Breeding Center were reassessed to diminish ...
Khalid Al‐Habsi +7 more
wiley +1 more source
Gaoya dianqi, 2019 利用Ansys软件建立了高压开关设备用矩形槽O形密封圈模型,对该O形密封圈的变形和应力分布状况进行了数值模拟分析,研究了其工作时的受力、变形及密封效果。对该O形密封圈在不同压缩率、不同充气压力下的内应力及密封面接触应力分布进行了探讨,确定了仅考虑应力作用下O形密封圈材料容易失效的位置,并得出充气压力在1.6 MPa以下时O形密封圈没有被挤入上、下法兰间隙。
涂德华, 魏雅君, 张鑫
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