ABSTRAKKereta merupakan sebuah alat transportasi umum yang sering digunakan oleh masyarakat untuk berpergian dari kota asal ke tujuan. Mereka membutuhkan akan sarana mempermudah aktifitas mereka. Namun kecelakaan di persimpangan jalan raya terlintasi kereta api memiliki angka cukup besar akibat kelalaian petugas menutup palang pintu api. Maka itu penelitian ini dibuat agar mengetahui keberadaan...

the aims of this study were to investigate the effect of photoperiod and light intensity on egg production and hatching rate in acartia clausi in laboratory conditions. this zooplankton was collected from caspian coastal waters of mazandaran province by the use of a 100µ net. all tests were performed in five light treatments (photoperiod) namely 24:00, 18:06, 12:12, 06:18, 00:24 (light / dark),...

On the quest of discovering novel local strains microalgal species that can be effectively cultured with industrial perspectives, two cyanobacterial Anabaena sp. and Cyanothece were isolated from lagoonal saltworks waters Messolonghi lagoon (W. Greece). They batch at 20–21.5 °C in six combinations three salinities (20, 40 60 ppt) light intensities (2000 8000 lux) resulting in: (a) grew best 20 ...

The preservative challenge test is a regulatory requirement specified in various pharmacopoeias to determine the efficacy of preservatives. However, such testing is a labour-intensive repetitive task and often requires days before results can be generated. Microbial biosensors have the potential to provide a rapid and automated alternative to the traditional viable counting currently in use. Ho...

In this study, the effects of different light regimes on the reproductive activity of a typical Indo- Pacific coral reef rabbitfish, Siganus sutor, were evaluated. Forty- five adult fish were exposed to nine different photoperiod (8L: 16D, 12L: 12D, 16L: 8D) and light intensity (1000, 2000, 3000 lux) combinations with three replicates and five other fishes reared under indoor light condition (C...

Here we provide a molecular description of a new psychrophilic strain, KCh11, of marine luminescent bacteria classified as Aliivibrio logei. We sequenced the entire lux operon of A. logei KCh1 and showed that it is substantially similar to the lux operon of Aliivibrio salmonicida. It was demonstrated that the reduced production of bioluminescence in A. salmonicida is most likely defined by a sp...

BACKGROUND: In a previous study, when adult subjects were exposed to a level of 400 lux light for more than 30 min or a level of 300 lux light for more than 2 hours, salivary melatonin concentration during the night dropped lower than when the subjects were exposed to dim illumination. It was suggested that such light exposure in adolescents or children during the first half of subjective night...