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Vijay S. Bhat S. Lokeshwarappa Amit Kumar Mandal 《Indian journal of clinical biochemistry : IJCB》2015,30(2):238-242
The present case report describes the molecular and proteomic based study of Hb variant HbE associated with β+ thalassemia IVS 1-1 G>T, in a juvenile diabetic patient. Given the ethnic origin and mobility of the variant hemoglobin at alkaline pH, HbE would be suspected. But hematologically and clinically abnormality being detected, HPLC and Electrophoresis not being able to characterize due to retention time and band being in region of HbA2, respectively, further characterization of hemoglobinopathy was made using MALDI and IVS 1-1 G>T being validated by reverse dot blot hybridization. Capillary electrophoresis was also employed in order to separate HbE and HbA2 bands. This case report being first of its kind, wherein a HbE/β+ thalassemia has been characterized using multiple techniques. 相似文献
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通过对模具顶杆与排气阀两类零件在离子渗氮中设置合适的辅助阴极，渗氮后作渗层深度、显微硬度和金相分析，结果表明，长度与直径比例很大且富含Cr和Ni的模具顶杆与双金属排气阀的均匀渗氮问题由于利用设置合适的阴极产生的空心阴极效应(HCE)而得到有效的解决，讨论了因HCE引起的等离子体振荡对离子渗氮过程及其硬化作用的影响。 相似文献
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Ionization quantum efficiency is one of the important parameters in studying the gas discharge.In the present paper, we report a spectral technique to determine the relative ionization quantum efficiency of CO generated by discharging its parent molecule CO to CO2. 相似文献
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若干氢键团簇的纳秒和飞秒激光光电离及从头计算研究 总被引：1，自引：0，他引：1
利用纳秒和飞秒激光及飞行时间质谱仪对氮化苯 溶剂分子团簇的多光子电离和离解进行了研究。通过解决实验中的技术难题,实现了在气相条件下实验研究嘧啶与水团簇的多光子电离。首次观测到该团簇的多光子电离质谱,发现电离后形成了质子化团簇系列,通过团簇浓度随激光强度的变化以及理论计算,阐明了团簇内质子转移过程,以及电荷分布和质子转移过程随着团簇尺寸的变化;首次观测到吡啶团簇在飞秒光电离过程中的质子化和非质子化团簇离子共存的现象。非质子化吡啶二聚体离子的存在及高水平下理论计算表明,吡啶分子之间可以形成C -H N氢键,对文献中报道的结果给予了纠正,提供了弱氢键团簇中质子转移的一个极佳范例;首次研究并获得了嘧啶 甲醇以及哒嗪 甲醇氢键团簇的多光子实验研究结果.实验发现团簇经激光电离后只产生质子化产物,并从理论计算得到各种团簇的稳定构型,阐明了团簇发生电离后质子转移反应的过程和机理 相似文献
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ZHANG Guochang 《商丘师范学院学报》2009,25(12):36-38
The frequency-tunable light, which was produced by using YAG laser to pump the dye rhodamine 590/610, was used to measure the ions number in ionization of the benzene molecules Rydberg state 5Rg|10 as a function of the light intensity. Fitting themeasured data by using the deduced equation from the method of spatial integration, the ionization cross section of single photon of molecule benzene 5Rg|10 was obtained to be 2.1×10-19,cm2 approximately. 相似文献
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Tannins from Canarium album with potent antioxidant activity 总被引：1，自引：0，他引：1
The contents of total phenolics and extractable condensed tannins in the leaves,twigs and stem bark of Canarium album were determined.The structural heterogeneity of condensed tannins from stem bark was characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and nuclear magnetic resonance (NMR) analyses.The results show the predominance of signals representative of procyanidins and prodelphinidins.In addition,epicatechin and epigallocatechin polymers with galloylated procyanidin or prodelphinidin were also observed.The tannins were screened for their potential antioxidant activities using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric reducing/antioxidant power (FRAP) model systems.Tannins extracted from leaves,twigs and stem bark all showed a very good DPPH radical scavenging activity and ferric reducing power. 相似文献
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杨桂玲 《河北北方学院学报(社会科学版)》2003,19(6):46-48
一般的,同周期元素的金属活泼性,从左至右减弱.锰的金属活泼性却比相邻元素来得高.从热力学和原子结构两个方面,讨论了金属锰特别活泼的必然性. 相似文献
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王晓丽 《雁北师范学院学报》2000,(6)
溶液理论是电化学中重要的基础理论 ,而且还有许多目前无法定论的有争议的地方 .虽然在一般教科书中所占篇幅不大 ,但有一定的难度 ,为了使学生更好地掌握它 ,有必要对它的发展进程做一番详细的论述 .1 电离学说的提出和被认同瑞典青年 S· A·阿累尼乌斯于 1 883年在进行其博士学位答辨时提出了电离学说 ,其主要论点是“电解质溶解后立即离解 ,不管是否有电流通过 ,溶液永远有离子存在 .”当时化学家们认为这是难以接受的 ,因为当时他们未曾理解离子与原子之间的重要区别 .由于钠与氯化合形成氯化钠反应是如此激烈 ,因此很难相信仅将盐溶… 相似文献