助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[12344]条 当前为第1条到20条[由于搜索限制,当前仅支持显示前5页数据]
 

相关语句
melting
Ultraviolet (UV) melting curves of the DNA at 260 nm as well as the calorimetric measurements were used to estimate the binding constants (K), melting enthalpy (ΔH°m) and binding enthalpy (ΔH°b).
      
Both infrared spectra and melting point of the compound were consistent with those reported earlier.
      
It was found by DSC measurements that the melting point of samples gradually shifted to lower temperatures with the decrease of the solution concentration used for sample preparation.
      
The yield of the final product was 78%, and the melting point was 231-233°C.
      
The thermotropic properties, the melting point (Tm) and the isotropization temperature (Ti) of the synthesized polyurethanes were characterized by DSC, IR and POM.
      
The melt droplets with a height of 50-100 nm and a lateral size of 2-3 μm were obtained by melting the PEO ultra-thin films on a mica surface.
      
Direct melting polycondensation and characterization of poly(?-caprolactone-co-lactic acid)
      
A kind of biodegradable material, poly(?-caprolactone-co-lactic acid) [P(CL-co-LA)] was synthesized via the direct melting polycondensation of lactic acid (LA) and ?-caprolactone (CL).
      
Compared with lactide ring-opening polycondensation (ROP), the direct melting polycondensation of LA and CL is more practicable and simple.
      
The results of characterization show that: (1) Compound A has a chiral carbon next to the carbonyl group, so the formation of the ring structure is not sterospecific; (2) the melting point is about 254.5°C.
      
The process easily controls the porosity, the pore size, the pore orientation, and the pore morphology when the melting and solidifying conditions are varied in a wide range.
      
The materials of emitters should have good electronic conductivity, high melting points, good chemical inertness, and high mechanical stiffness.
      
All noble metal clusters have negative heat capacity around the solid-liquid phase transition temperature, and hysteresis in the melting/freezing circle is derived in noble metal clusters.
      
This method is based on the Lindemann criterion for melting, Mott's expression for the vibrational melting entropy, and the Shi model for the size-dependent melting temperature.
      
As the temperature increases, a sharp electrochemical signal change in the melting curve of wild-type dsDNA appears.
      
Investigation on multiple-melting behavior of nano-CaCO3/polypropylene composites
      
The multiple melting-peak behavior of polypropylene (PP) in nano-CaCO3/PP composites and modified nano-CaCO3/PP composites were investigated under the condition of isothermal crystallization and nonisothermal crystallization.
      
The crystallization temperatures of nano-CaCO3/PP composites modified by reactive monomers were further increased, but the melting-peak intensity of the β-crystal of PP was not greatly influenced.
      
While in the presence of dicumyl peroxide, nano-CaCO3/PP composites modified by reactive monomers led to the significant increase in the melting-peak intensity of the β-crystal of PP.
      
The double melting-peak of PP was observed, which was attributed to the formation of two kinds of different crystallization forms of α-crystal or β-crystal during the crystallization of PP.
      
 

首页上一页12345下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社