pHi regulatory ion transporters: an update on structure, regulation and cell function

Intracellular pH (pH_i) is a major regulator of various and critical cellular functions. A close regulation of pH_i is thus mandatory to maintain normal cellular activity. To this end, all cells express ion transporters that carry across their plasma membrane H⁺ or equivalent H⁺ into and out of the cell. Besides pH_i, these ion transporters are under the regulation of neurohormonal stimuli. This review summarises the molecular identity, regulation and function of the main membrane pH-regulatory ion transporters. Received 30 December 1998; received after revision 4 February 1999; accepted 9 February 1999     

微量铈离子在酸性电镀锡过程中沉积机理的探讨

本文根据实验结果分析、讨论了微量稀土金属铈离子在酸性电镀锡过程中的沉积机理。初步认为是：吸附欠电电位沉积机理。     

利用离子阱制备与测量量子态

介绍了利用离子阱制备与测量量子态,实现量子计算机系统的基本工作原理,讨论离子阱量子计算机的优缺点,及面临的挑战.     

谷氨酸离子交换过程动态穿透曲线的分析

介绍了一种新的分析离子交换过程穿透曲线的方法，该方法采用特定的函数来描述穿透曲线以求出在不同实验条件下的离子交换过程的传质参数。该特定函数建立在吸附区传质概率的基础上，因此传质机制可以用函数的常数来表示，无需识别传质机理。采用该方法建立了ＮＨ４＋型阳离子交换树脂吸附谷氨酸的穿透曲线模型，以得到离子交换过程的传质参数。     

尼古丁-FET传感器的研制

尼古丁是烟草中最重要的生物碱。本文报导以四苯硼酸尼古丁缔合物为活性材料,研制了尼古丁场效应管传感器,测试了器件的性能参数,获得满意的结果。其线性范围在10~(-1)～10~(-4)mol/l,斜率为56±1mV/pc,适用的 pH 范围在5.5～7.5之间。     

球形闪电的形成及运行机理初探

指出了闪电时形成的离子管形层流,其间歇流动产生涡环,提出了由若干导电离子流形成的涡环组合,它们间的相互作用构成稳定的球形闪电,该假设能解释球形闪电的形成、构造及其长寿命等基本性质.     

Morphology of polar ionospheric O^＋ ion upflow： FAST observations during quiet time

With energetic ion measurements on FAST satellite, the morphologic features of quiet-time ionospheric O ion upflowing at altitudes of 2000 to 4000 km are drawn out for the first time. The pre-noon cusp/cleft is the predominant region of upflowing occurrence for O with lower energy. Meanwhile the pre-dawn sector near the equatorward edge of the plasma convection dominates the occurrence for the higher energy O ions. No matter whether the energy is lower or higher, the upflows occur often over a wide MLT range of lower latitudes outside the auroral oval. The upflowing within the pre-midnight (21:00― 22:00 MLT) auroral oval carrys larger energy fluxes, with extremely large fluxes for higher energy O appearing near the polar cap boundary. For altitudes of 2000―4200 km under observation, the ion conics occur much more frequently than ion beams. Ion beams are rarely found below 3000 km, while the conics occur uniformly over the observed altitudes.