Ionizing radiation can induce DNA damage and cell death by generating reactive oxygen species (ROS). The objective of this study was to investigate the radio-protective effect of catalpol (a main bioactive component in the traditional Chinese Rehmannia) on irradiated cells and mice. We found that treating cells with catalpol (25-100 μg/ml) before irradiation could significantly inhibit ionizing...

In this study, several factors affecting Tetragenococcus halophilus CH6-2 cell survival rate in spray drying process including growth conditions, protective agents, and stress adaption were investigated. T. CH6-2, which was grown different media, mixed with agents or at ratios of concentration to subjected before drying. The after storage determined. results showed that skim milk had the strong...

To improve the performance of 802.11 WLAN systems under congestion conditions, an agent-based radio resource management system is proposed that can dynamically change an Access Point’s radio coverage pattern. A low-cost four sector semi-smart antenna array is used for access points. With a distributed simulation system using Multi-Agent Platform, we present statistical results showing system pe...

Emerging infections caused by fungi have become a widely recognized global phenomenon. Their notoriety stems from their causing plagues and famines, driving species extinctions, and the difficulty in treating human mycoses alongside the increase of their resistance to antifungal drugs. This special issue comprises a collection of articles resulting from a Royal Society discussion meeting examin...

UNLABELLED This descriptive, qualitative study aims to describe risk factors, in the work environment, for the consumption of alcohol and other drugs, and also to confirm the importance of protective factors. Interview technique was used with 51 nursing students at the Rio de Janeiro State University, who work in the city's health services. RESULTS students related work as a risk factor for t...

Despite more than 200 yr of recognition that some microscopic metazoans survive environmental conditions far beyond those experienced in nature while in a cryptobiotic state, this phenomenon has received little attention from evolutionary biologists. The excess environmental resistance exhibited by cryptobiotic organisms cannot be viewed as an adaptation within current evolutionary biology. Rat...