Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
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79 巻 , 6 号
選択された号の論文の21件中1~21を表示しています
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  • Masaki YAMAGUCHI, Vivek SHETTY
    79 巻 (2011) 6 号 p. 442-446
    公開日: 2012/03/30
    ジャーナル フリー
    Interest in the salivary indices of the individual psychosomatic stress response has focused on various components of the salivary proteome including α-amylase, cortisol, dehydroepiandrosterone-sulphate (DHEA-S), testosterone, chromogranin A, and secretory immunoglobulin A (SIgA). The nonintrusive nature of saliva collection and the minimal processing required renders saliva an attractive alternate to blood and urine. The ease of saliva collection greatly facilitates subject compliance and allows repeat, self-administered sampling in naturalistic settings without the need for specialized personnel or equipment. Correspondingly, saliva is increasingly utilized in psychobiological studies. Recent developments in technology platforms allow near real-time detection and quantification of salivary stress response indicators. This review focuses on the current status of these developments in salivary biosensing technology and future technological advances that will render biomarkers more field-practical and accessible to end-users in a cost-effective manner. The maturation salivary biosensor prototypes into commercial devices will happen as the functionality, performance and production costs improve. In the long term, the growing convergence of proteomic and genomic profiling, biosensing technology and bioinformatics will allow salivary biomarker-based strategies to become ingrained in experimental studies and eventually, lead to better risk assessment, diagnosis and a patient-centric management of stress-related diseases.
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  • Katsuhiko TSUNASHIMA, Fumihiro YONEKAWA, Masahiro KIKUCHI, Masashi SUG ...
    79 巻 (2011) 6 号 p. 453-457
    公開日: 2012/03/30
    ジャーナル フリー
    Additive behaviors of several bis (trifluoromethylsulfonyl) amide-based phosphonium salts in an organic electrolyte used for lithium secondary batteries are reported. Electrolytic properties of a lithium hexafluorophosphatebased organic electrolyte mixed with the phosphonium salts were examined. It was found that the mixed electrolytes containing the phosphonium salts showed lower conductivities and higher viscosities than the organic electrolyte. However, in the case of the mixed phosphonium electrolytes based on asymmetrical cations, the charge-discharge cyclabilities of the lithium battery cells were superior to that of the cell containing the organic electrolyte. Furthermore, the thermal stability of LiCoO2 cathodes charged in the mixed phosphonium electrolytes was considerably improved. These results suggest that the phosphonium salts are regarded as effective electrolyte additives for lithium secondary batteries.
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  • Chuen-Chang LIN, Peng-Yu LIN
    79 巻 (2011) 6 号 p. 458-463
    公開日: 2012/03/30
    ジャーナル フリー
    Manganese oxide thin films are deposited on graphite foils by a dry process, one step reactive radio frequency (RF) magnetron sputtering with different volume flow rates of oxygen and sputtering time. Maximum mass specific capacitance of 320.26 F g−1 is obtained in 0.5 M LiCl as well as with optimum sputtering conditions [volume flow rate of oxygen=10 sccm (cm3 min−1) and sputtering time=60 min], and this demonstrates its good mass specific capacitance at a sweep rate of 100 mV s−1. Furthermore, the mass specific capacitance and the geometric specific capacitance increase at lower volume flow rates of oxygen, but decrease at higher volume flow rates of oxygen. Moreover, the electrochemical stability of the electrode increases with increasing sputtering time.
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