Study on n-type PbTe material doped with In and PbI_2 掺杂In和PbI2的n-PbTe材料的研究
The number of the first polar body ( PbI) were checked, and morphological classes of PbI were counted. 了解卵子第一极体形态与胚胎形态和临床妊娠的关系。
Analysis on the Phase Change of Pb-I System and PbI_2 Crystal Growth Pb-I系统的相变分析与PbI2晶体生长
Growth of Lead Iodide ( PbI_2) Single Crystals 碘化铅(PbI2)单晶体生长研究
Objective To investigate the application and diagnosis value of MRI measurement methods in PBI. 目的探讨原发性颅底凹陷症的MRI测量方法及其应用与诊断价值。
The present work is not only a solid base for further exploration on high quality PbI_2 film, but also an active endeavor in the application process as a room temperature nuclear detector and X-ray image detector. 这些工作不仅为进一步探索高质量PbI2薄膜的制备打下了基础,而且也为PbI2薄膜在室温核辐射探测器及X射线成像探测器方面的应用提供了有价值的参考。
Lead iodide ( PbI_2) crystal is one of the most promising room nuclear radiation detector materials. 碘化铅(PbI2)晶体是一种极有前途的室温核辐射探测器材料,可用于探测1keV-1MeV范围内的γ射线和α射线,在制作大面积X射线成像阵列方面也具有诱人的前景。
But PbI_2 detectors have not been studied in detail because of the lack of high quality PbI_2 single crystals and suitable fabricating technology of the devices. 但由于没有制备出高质量的PbI2单晶体,加上没有成熟的半导体材料加工技术与器件制作工艺,人们对PbI2探测器没有进行深入的研究。
In crystal growth experiment, PbI_2 single crystal was grown by Vertical Bridgman Method ( VBM) in the two-temperature zone vertical growth furnace. 晶体生长实验中,我们自行设计了双温区管式电阻生长炉,采用垂直布里奇曼法(VBM),以合成的PbI2多晶为原料进行晶体生长。
Review on PBI Model of Teaching in American Primary and Middle Schools 美国中小学教学中的PBI模式研究
Using WAXD method, the crystalline behaviours of poly ( butadiene-co-isoprene) ( Ln& PBI) at low temperature were studied. 本工作用WAXD法对以环烷酸稀土盐为主的催化剂合成的丁二烯和异戊二烯共聚物(Ln-PBI)在低温下的结晶行为进行了研究。
After 16 days in culture, one parthenogenetic egg which released pbI had been obtained. 培养16d得到1枚排出pbI的孤雌激活卵;
Problem based instruction ( PBI) model plays a great role in the activity capacity of American primary and middle school students. 美国中小学教学中的以问题为基础的教学模式&PBI模式对美国中小学生的动手实践能力具有很大作用。
Preparation and properties of polybenzimidazole ( PBI) were discussed. The advance in modification, doping, and proton transport of polybenzimidazole are reviewed. The application in fuel cells of polybenzimidazole and modified polybenzimidazole is commented. 讨论了聚苯并咪唑(PBI)的制备、种类及其性能,综述了围绕PBI用作质子导电材料的改性、掺杂及质子输送机理的研究进展,评述了PBI在质子交换膜中应用的进展。
There is a positive relationship between protein-bound iodine ( PBI) and maximum uptake by the thyroid. 38例血清蛋白结合碘表明,它们与甲状腺最大蓄~(131)I率呈正相关关系。
Thermogravimetric analysis indicated that the composite membranes were thermal stable up to 400 ℃ for the PBI/ ZrP/ PSF system and 230 ℃ for the PBI/ SPSF ( H) system, respectively. 热失重分析表明,复合膜PBI/ZrP/PSF和PBI/SPSF(H)的热稳定性可分别达400和230℃。
Objective: To study the effects of endothelin-1 ( ET-1) on mouse oocyte germinal vesicle breakdown ( GVBD) and extrusion of the first polar body ( PBI). 目的研究内皮素-1(ET-1)对小鼠未成熟卵母细胞生发泡破裂(GVBD)、第一极体(PBⅠ)排出的影响。
Performance expectation on PBI/ H_3PO_4 system high temperature PEMFC PBI/H3PO4体系高温PEMFC的性能预测
Phosphoric acid doped PBI composite membranes exhibited a high conductivity at temperatures up to 200 ℃ under low humidity. 磷酸掺杂的PBI复合膜在温度高达200℃的低湿度条件下,呈现出高质子电导率。
Formation and Crystallization Behavior of the Ternary PbI_2-PbCl_2-KCl Glass PbI2-PbCl2-KCl系统玻璃的形成及其析晶行为研究
In the four synthesis technologies of PBI, solution polymerization and melt polymerization were relatively mature synthesis process. 其中溶液聚合法和熔融聚合法是相对成熟的合成工艺。
Doping the conductor into PBI membranes to get the inorganic-organic hybrid membrane. 将选定的无机质子导体与聚苯并咪唑膜基体,通过物理掺杂的方法进行处理,得到有机无机复合膜。
The elaboration of relevant theory research home and abroad provides further proof of the value of this research. Next, the author is able to gradually construct a tailor-made PBI Model for primary school through constant research and practice. 国内外的相关理论研究的阐述进一步证实了本研究的价值。其次,在作者不断的研究和实践过程中逐步构建了适合小学的项目探究性学习的一般模式。
Based on the fact that the proton conductivity of the pure PBI is as low as about 10-7 S/ cm at room temperature, PBI can be modified by doping with acid and alkali, sulfonation, and blending with other polymer electrolytes and inorganic materials. PBI本身的质子传导率很低,室温下仅为10-7S/cm,可通过掺酸、掺碱、磺化以及与其他聚合物电解质和无机材料复合等方式改性。
In case of no effects on the mechanical strength, the obtained composite membrane had higher conductivity than the PBI membrane with the same phosphoric acid doping level. 在不影响机械性能的前提下,与相同磷酸掺杂水平的PBI膜相比,PBI/ABPBI复合膜的电导率有一定程度的提高。
In this dissertation, polybenzimidazole resins,( PBI) history of development, the current state of development, synthetic methodology, type, performance, application and the synthesis of monomer is first briefed introduced. 本文首先介绍了聚苯并咪唑树脂(PBI)的发展由来,目前的发展状况,单体的合成,聚合物合成工艺、种类、性能以及推广应用。
A series of Polybenzimidazole based PEM was prepared by grafting, post-sulfonation, direct polycondensation, and blending. 人们相继采用接枝、后磺化、直接缩聚和共混等方法来制备PBI基质子交换膜。