Validation of Rapid Assimilation of PCBs Following IP Dosing in the Round Goby (Neogobius melanostomus)

The assimilation of polychlorinated biphenyls (PCBs) in round gobies (Neogobius melanostomus) after intraperitoneal (IP) injection was compared to PCBs bioaccumulated by the same fish through natural exposure (“native” PCBs). Lipid equivalent corrected dorsal muscle: whole body concentration ratios for native PCB 153 averaged 1.16 ± 0.77 and ranged from 1.19 to 1.24 for three IP dosed non-native PCBs within 6 h after dosing. Variation in tissue distribution of IP-dosed congeners was reduced after benchmarking to PCB 153, reinforcing that assimilation of the IP dose occurred into muscle rapidly after injection. Despite the use of small oil volumes during injection (<10 μL per fish), coefficients of variation of IP-dosed PCBs were equivalent to those observed for native PCBs. The results suggest that IP dosing provides a precise method to achieve target concentrations of hydrophobic chemicals in small fish and does not require several days to achieve assimilation into highly perfused tissues.     

食物及根周土含氟量测定

本文报告了1986～1989年没有氟污染的长丰、滨湖,逐丰、永丰、三工村(饮水含氟平均为0.21、0.54、1.12、2.47、3.72μg/L),采集食物及根周土各1220份。用保护性灰化、标准添加、电极法测定食物氟;电极法测定土壤溶解性氟。结果表明:食物含氟与根周土含氟没有显著的相关关系。当地产粮食、蔬菜不致成为地方性氟中毒的高氟来源。     

Prediction of Mercury Elimination Rate Coefficients of Fish is Improved by Incorporating Fish Temperature Classification into Models

Bulletin of Environmental Contamination and Toxicology - This study evaluated the dependence of mercury (Hg) elimination by fish on species specific fish metabolic rate in order to generate...     

火焰原子吸收法测定果汁中钠的影响因素及消除

目的探讨火焰原子吸收法测定果汁钠的方法。方法果汁经硝酸-硫酸消化，加入保护剂、消电离剂等，选择钠元素次灵敏线火焰原子吸收法测定。结果本方法的线性范围为0～16ng／ml，检出限为0．22ng／ml，加标回收率为98．2％～103．3％，RSD〈3％。结论火焰原子吸收法选择次灵敏线，适用于果汁产品中钠离子测定。     

Discovery and epidemiology of PCB poisoning in Taiwan

An outbreak of PCB poisoning through consumption of the contaminated rice oil in Central Taiwan was investigated. It covered four counties and there were 1,843 cases by the end of 1980. The highest frequency of incidence occurred during the period from March to July 1979. Severity of clinical manifestations was graded, most patients exhibiting mild or moderate severity. The major age group of the outbreak was between 11 to 20 years old. Most of the victims were students and factory workers. The amount of PCB intake in each victim was estimated to be 0.7 to 1.84 gm and the latent period from the time of intake to the onset of clinical manifestations was approximately three to four months. The patients' blood PCB concentrations ranged from 3 to 1,156 ppb. In 613 patients, 44.37% (272 patients) had PCB levels of 51-100 ppb, and 27.57% (169 patients) had levels over 100 ppb.     

常规护理查房和晨间床边护理查房效果的对比分析

目的对比分析常规护理查房和晨间床边护理查房的效果,以供参考。方法我院自2012年5月起实施晨间床边护理查房,以实施晨间床边护理查房前一年内住院患者178例为对照组,以实施晨间床边护理查房后一年内住院患者192例为观察组,对比两组医护满意率、护患满意率的差异性。结果对比两组医护满意率发现,观察组明显高于对照组,差异具有统计学意义(P<0.05)。对比两组护患满意率发现,观察组明显高于对照组,差异具有统计学意义(P<0.05)。结论晨间床边护理查房有助于医生和护理人员之间的沟通协作,增进患者和护理人员的理解和体谅,对各项护理工作的顺利开展有益。