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Nazan Karsavuran Mohammad Charehsaz Hayati Celik Bayram Murat Asma Cengiz Yakıncı 《毒物与环境化学》2013,95(10):1564-1570
Hydrogen cyanide (HCN) poisoning due to amygdalin (AMY) in apricot seeds is one of the public health issues in Turkey. The aim of this study was to investigate the AMY content of 13 different apricot seeds including bitter and sweet ones, and which are either sulfurized or roasted. The AMY content was determined by a high-performance liquid chromatography. Release of HCN was predicted and total amount of seeds which can cause poisoning was calculated. The mean AMY content of bitter seeds was 26 ± 14 mg g?1 and that of sweet seeds was 0.16 ± 0.09 mg g?1. The consumption of small amounts of bitter seeds may cause cyanide poisoning. 相似文献
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Patrick Gautier Kurtulus Olgun Nazan Uzum Claude Miaud 《Behavioral ecology and sociobiology》2006,59(6):836-841
Gregarious behaviour (i.e. living in groups in contrast to a solitary life) is commonly observed in mammals, but rarely documented
in amphibians. Environmental features and/or animal mutual attractions can promote the formation of aggregations that may
both reduce the risks of dehydration and predation and increase mate access and fitness. Luschan’s salamander (Mertensiella luschani) lives in permanently arid Mediterranean environments; individuals shelter in cracks and crevices and leave only during favourable
periods. In this study we examined the role of chemical tracks, in self and conspecific recognition (i.e. gregarious/solitary
behaviour), on the social structure of this species. Our results show that juveniles and adults of both sexes use chemical
scents deposited on substrate to relocate their shelter. In contrast to numerous other salamander species, Luschan’s salamanders
also use social information, conveyed by conspecific scents, to identify a safe shelter. Furthermore, this scent marking does
not play a role in sexual attraction but allows sex discrimination. This species exhibits gregarious behaviour (i.e. conspecific
attraction) as a possible adaptation to dry environments. We discuss both ultimate and proximate factors in the evolution
from a solitary to a gregarious life. 相似文献
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Aytac S Bozkurt V Bayram N Yildiz S Aytac M Akinci FS Bilgel N 《International journal of occupational safety and ergonomics》2011,17(4):385-402
This research was conducted to address the experience of workplace violence of Turkish workers from different sectors and to investigate the impact of the exposed violence on their psychological well-being. Data were collected anonymously with printed questionnaires from the volunteer participants and depended on self-reporting. The response rate was 79.0% (1708/2161). The prevalence of workplace violence was found to be 44.8%. The most common type was verbal violence together with mobbing (bullying). Victims of physical violence were mostly males, whereas females were found to be victims of verbal, psychological and sexual violence. Most cases did not result in legal action and the victims remained silent. Psychological well-being of exposed workers in terms of depression, anxiety and stress seemed to deteriorate. Workplace violence remains a silent epidemic in Turkey. Preventive measures against workplace violence and social support for violated workers do not exist. 相似文献
4.
Kucuksezgin F Kayatekin BM Uluturhan E Uysal N Acikgoz O Gonenc S 《Environmental monitoring and assessment》2008,141(1-3):339-345
The aim of this study was to identify possible relationships between biochemical- superoxide dismutase (SOD), glutathione
peroxidase (GPx), thiobarbituric acid reactive substances (TBARS) of mussels (Mytilus galloprovincialis) and chemical (Hg, Cd, Pb, Cr, Cu, Zn, Mn and Fe) contaminants from relatively clean area (Middle Bay) and heavily polluted
area (Inner Bay) of the Izmir Bay. Sampling of mussels was performed in the beginning of May 2004. Mussel digestive glands
have been used for biochemical assays. Trace metal content was determined by atomic absorption spectrophotometer using standard
procedures. Metal contents in mussels collected at polluted site increased compared to the middle part of the bay. While there
was a positive correlation between metals and SOD enzyme activity, there was a negative correlation between metals and GPx
enzyme activity. An increase was observed in SOD enzyme activity and a decrease of GPx enzyme activity at the inner part of
the bay. 相似文献
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Vedat Uyak Senay Soylu Tufan Topal Nazan Karapinar Kadir Ozdemir Sahin Ozaydin 《Environmental Forensics》2014,15(2):190-205
This study presents the seasonal and spatial variations of trihalomethanes (THMs) and haloacetic acids (HAAs) in 30 sampling points within three water distribution systems of Istanbul City, Turkey. The effects of surface water quality, seasonal variation, and species differences were examined. The occurrence of chlorinated THMs and HAAs levels was considerably lower in the system in which raw water is subjected to pre-ozonation versus pre-chlorination. Seasonal analysis of the data indicated that the median concentration of four THMs (THM4) was higher than nine HAAs (HAA9) concentrations in all three distribution systems sampling points. For all distribution systems monitored, the highest median THM4 and HAA9 concentrations were observed in the spring and summer season, while the lowest concentrations of these disinfection byproduct (DBP) compounds were obtained in the fall and winter period. Due to the higher level of bromide in supplying waters of these two systems, moderate levels of brominated DBP species have been observed in the Kagithane and Buyukcekmece distribution systems districts. In fact, Spearman partial correlations (Spearman rank correlation coefficients [rs]) tend to be higher among analogues in terms of number and types of substituent, especially TCAA with TCM (rs 0.91), and DBAA with DBCM (rs 0.90). In contrast, the hydraulic (residence time and flow rate) and chemical mechanisms (hydrolysis, volatilization, and adsorption) affect the fate and transport of DBPs in distribution systems. Seasonal and spatial variations of DBPs presented in this study have important implications on regulatory issues and from an epidemiological point of view. 相似文献
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