氨基磷酸树脂负载镧化合物杂化吸附剂的制备与性能

制备了水合氧化镧(LaH)并将水合氧化镧负载于氨基磷酸树脂(APAR)上制得杂化吸附剂LaH-APAR,用红外光谱(FT-IR)、热重(TGA)对LaH-APAR的结构和热学性能进行了测试,并研究了pH值、温度对LaH及LaH-APAR吸附氟离子性能的影响。结果表明,La3+与APAR以配位键结合,LaH-APAR吸附剂在300℃以下比较稳定,它与LaH吸附性能基本相同,受pH值影响不大,可以在较宽的pH范围内使用;在pH不变的情况下,LaH-APAR随着温度的升高吸附速率也相应提高,属于温度控制吸附,且为化学吸附。     

高岭土的活化及其地质聚合物的性能研究

研究了4种高岭土在不同煅烧条件下的活化及其地质聚合物的抗压强度和H4 交换容量的变化趋势.试验结果表明:产地相同的高岭土在800℃煅烧6 h后,所合成的地质聚合物的抗压强度和NH4 交换容量达到最大值;产地不同的高蛉土经相同条件煅烧后,所合成的地质聚合物的抗压强度和NH4 交换容量差异很大,这与高岭土的化学成分没有相关性,而与煅烧高岭土在碱溶液中的硅铝溶出率有相关性.     

Improvement of the Energy Stability of the Single Ion Microbeam

Energy instability strongly affects the state and the beam size of the single ion microbeam. A facility based on the Generating Voltmeter was developed to improve the energy stability of the CAS-LIBB （Chinese Academy of Sciences, key laboratory of ion beam bioengineering） single ion microbeam. This paper presents the analysis of the energy＇ instability of the single ion microbeam. A simplified theoretical model is set up to calculate the relationship between the energy instability and the beam spot size. By using this technique, the energy instability is adjusted to about 1%. Stable run-time is over 6 hours. The radius of the single ion beam is reduced by 10% compared to the previous olin.     

Experimental Study of Diagnosis Neutral Beam for HT-7 Tokamak

Parametrical effect on plasma discharge and beam extraction in the diagnosis neutral beam （DNB） system for HT-7 tokamak was studied experimentally. Useful results with an improved beam quality were obtained.     

Ion Channels in Multiple Myeloma: Pathogenic Role and Therapeutic Perspectives

Ion channels are pore-forming proteins that allow ions to flow across plasma membranes and intracellular organelles in both excitable and non-excitable cells. They are involved in the regulation of several biological processes (i.e., proliferation, cell volume and shape, differentiation, migration, and apoptosis). Recently, the aberrant expression of ion channels has emerged as an important step of malignant transformation, tumor progression, and drug resistance, leading to the idea of “onco-channelopathy”. Here, we review the contribution of ion channels and transporters in multiple myeloma (MM), a hematological neoplasia characterized by the expansion of tumor plasma cells (MM cells) in the bone marrow (BM). Deregulation of ion channels sustains MM progression by modulating intracellular pathways that promote MM cells’ survival, proliferation, and drug resistance. Finally, we focus on the promising role of ion channels as therapeutic targets for the treatment of MM patients in a combination strategy with currently used anti-MM drugs to improve their cytotoxic activity and reduce adverse effects.     

Al4B2O9纳米棒改性制备优异综合性能的固体聚合物电解质

随着储能设备和电力驱动产品的激增,特别是电动汽车的大规模推广应用,全固态电池被认为是最有可能解决电动设备日益严峻的安全问题和高能量密度需求的策略之一.本文报道了一种Al4B2O9纳米棒改性的聚环氧乙烷(PEO)基固体聚合物电解质(ASPE),其具有高离子电导率、宽电化学窗口、良好的机械性能和阻燃性能.具体来说,因为Al...     

四苯硼钠比浊界限分析法测钾

试样经掩蔽铁杂质后,在微酸性条件下用四苯硼钠沉淀钾离子再与钾标准进行比浊,该方法便捷,测定范围为≥0．4≤1．2g／1KClO3。     

强电场作用下早龄期混凝土的氯离子迁移特征

电化学除氯技术能有效降低混凝土结构中的有害氯离子,降低混凝土结构失效风险。采用强电场方式对混凝土结构进行电化学除氯,并在不同的早龄期时间介入40、80、120 min的强电场作用,测试了内部氯离子含量变化和分布特征,并对通电后养护28 d试件进行回弹强度试验。研究结果表明：早龄期介入强电场作用能显著提高除氯效率,达到相同除氯效果时的作业时间约为传统电化学方法的1/300;氯离子分布特征表明,自由氯离子分布较传统电化学参数作用时更均匀,结合氯离子仍然存在保护层中间堆积现象;强电场作用后进行标准养护,回弹测试结果表明,强电场对混凝土的保护层宏观强度无明显影响。     

Stopping power of Mylar for heavy ions up to copper

The stopping powers of Mylar for several heavy ions covering Z=11 to 29 in the energy range 0.3 to 2.3 MeV/n have been measured using the elastic recoil detection technique and twin detector system. The technique provided a unique method to generate a variety of variable energy ion species utilizing a fixed energy 140 MeV Ag¹³⁺ primary beam from the Pelletron accelerator facility at Nuclear Science Center, New Delhi, India. Most of these measurements are new. The experimentally measured stopping power values have been compared with those calculated using LSS theory, Ziegler et al. formulation and Northcliffe and Schilling tabulations. Merits and demerits of these formulations are highlighted. Stopping power calculations using the Hubert et al. formulation have been extended successfully beyond its recommended range of validity, i.e. 2.5–500 MeV/n down to energies as low as 0.5 MeV/n.