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More and more electronic equipments are revealed in the market, such as the electric derailleur controller, electric shock absorber controller and the add-on assistance motors. Their fixation parts suffer from continuous as well as shock vibrations during their whole life cycles. Developers usually implement the vibration test rig for their own products or components, which occupy significant human resources within their design departments. This study proposes a vibration test and reliability evaluation system for bicycle electronic systems and components, the VibroTester, composed of a motor with multiple centrifugal weights in a relatively small space. VibroTester collects the accelerations on itself, the lower fork and the upper fork against various vibration frequencies by using distributed microcontrollers through CAN-compatible communication protocols, and transmits data to LabVIEW interface on a PC. Three different settings of vibration test toward an electronic shock absorber controller are delivered and discussed in this study.

Poly-ε-lysine (ε-PL) is a natural biologicalagent, it is water soluble, biodegradable, and non-toxic, so it can be used as food preservatives. Through sensory evaluation, pH, total volatile basic nitrogen (TVB-N), total bacteria count (TBC) and K-values analyses, the effect of poly-ε-lysine (ε-PL) on tilapia fillets stored at 4°C was investigated. The results showed that each indicator correlated well with the storage time, and ε-PL could extend the shelf-life of tilapia fillets under refrigerated condition for at least4 days in comparison with the control group. Comparison tests indicated that 0.6% solution of ε-PL has better preservation effect than 0.2% and 0.4% ε-PL solutions.

Hainanmycin is a new veterinary polyether antibiotic and has few sensitive analytical method in present days. In this study, a liquid chromatography-tandem mass spectrometry (LC–MS/MS) relying on multiple reaction monitoring (MRM) detection was developed for analysis of hainanmycin in animal feed. Feed samples were extracted with ethyl acetate and purified by two steps of liquid-liquid extraction (LLE) to get rid of water solvable matrix and lipids one by one. The final simple was analyzed by LC–MS/MS. The LC mobile phase was composed of 0.1% aqueous formic acid and 0.1% formic acidified acetonitrile by gradient elution. Average recoveries ranged from 74.22% to 87.85%, as determined by spiking with 2.0 (LOQ) ∼2500 μg kg −1 of hainanmycin. The inter-day and intra-day coefficient of variation was 9.21% to 11.77% and 7.67% to 13.49%, respectively. The limit of detection (LOD) and the limit of quantitation (LOQ) were 0.36 μg kg −1 and 2.0 μg kg −1 , respectively.

Changes in the arterial ketone body ratio during oral glucose loading were observed preoperatively in 134 patients with liver disease, and these data were correlated with the pathology findings of liver tissue and the postoperative clinical course. It was found that the redox tolerance index (RTI) could serve as a quantitive indicator of the severity of the underlying chronic hepatic disease in patients with liver disease, and as a reliable indicator of preoperative hepatic functional reserve. When the RTI was 0.70 or more, the underlying hepatic disease was slight and there was good hepatic functional reserve; these patients could tolerate any type of hepatic resection. When the RTI was less than 0.70 and more than 0.5, the underlying hepatic disease was moderate and hepatic functional reserve was poor; if the RTI was less than 0.50, major hepatic resection could not be tolerated.