The unique study of TiO 2 sol-gel modified carbon paste electrode (CPE) nanocomposites have been developed for electrochemical sensor detecting fipronil pesticide compound. We develop the easy synthesized TiO 2 via a sol-gel method and modified in CPE which applied electrochemical system as cyclic voltammetry (CV) because the concentration is proportional with current peaks. We discover the TiO 2 optimal mass used of 0.1 g which is compared with 0.7 g carbon and 0.3 mL paraffin. It has high-current anodic (Ip a) of 1.13×10 3 μA and high-current cathodic (Ip c)-0.96×10 3 μA in scan rate of 0.5 V/s. The limit of detection (LOD) of fipronil has been determined of 34.0×10-5 μM in percent recovery of 0.8%. Its high-stability for lifetime TiO 2-CPE nanocomposites was expressed for 13 days which mean that can be used for detecting fipronil pesticide.

Kata kunci: Acar rebung, Aktivitas antimikroba, bakteri asam laktat, suhu fermentasi

No abstract

Yellow bamboo shoot is a popular food material especially in Semarang because it is used as filling for lumpia (authentic food of Semarang). Beside used as filling, yellow bamboo shoot commonly known by Indonesian people. Considering bamboo shoot often processed into fermented traditional food, yellow bamboo shoot also potential to be examined as source of fermented food producing lactic acid bacteria. Lactic acid bacteria still become the most beneficial microorganisms associated with gastrointestinal system and moreover for obesity diet. The aim of this research is to study the probiotic potential of lactic acid bacteria produced from yellow bamboo shoot fermentation in 2.5% and 5% brine under room temperature (30 °C). From isolation, 22 single colonies obtained from 2.5% brine and 27 isolates obtained from 5% brine. The morphology and physiology analysis resulted in Lactobacillus and Streptococcus genus. All isolates were tested subsequently for probiotic potential. Based on the result, more than 50% identified isolates have probiotic potential.

This study investigates the relationship between job satisfaction and employee performance. To collect the data, this quantitative research distributed the survey to the 58 employees of PT. Chang Shin Reksa Jaya. The data was then statistically tested for linearity using SPSS 20. The result of the study showed the relationship between job satisfaction and employee performance and there was a linear relationship between job satisfaction and employee performance. This indicates that when employees are satisfied with the job, their job performance will improve. This study gives benefits in the development of applied theory that claims there is a linear relationship between job satisfaction and employee performance. Another practical benefit of this study is that the company needs to improve employee performance by evaluating the level of employee satisfaction.