The aim of presented study was to determine the behavioural response of precopulatory pairs of Gammarus tigrinus exposed to the 17α-ethinylestradiol （EE2）. It was hypothesized that 17α-ethinylestradiol would incre...The aim of presented study was to determine the behavioural response of precopulatory pairs of Gammarus tigrinus exposed to the 17α-ethinylestradiol （EE2）. It was hypothesized that 17α-ethinylestradiol would increase the time needed for a male to re-capture a female. Hypothesis was tested in a laboratory with 20 precopula pairs exposed to different treatment conditions. Paired animals were exposed to two different compound concentrations of 50 ng·L-1 and 500 ng·L-1. The control and solvent control was artificial sea water and artificial sea water with ethanol （the diluent for EE2）. The couples were tested several times under different experimental treatments. The obtained results indicate that EE2 affects the precopulatory mate guarding behaviour of Gammarus tigrinus. EE2 in concentration of 50 ng·L-1 and 500 ng·L-1 prolonged the time needed for re-pairing. However, relative to the controls only EE2 in concentration of 500 ng·L-1 significantly prolonged the time needed for male-female re-coupling. In summary, EE2 affects the reproductive behaviour of Gammarus tigrinus.展开更多
Objective:The main objective of this initiative was to present evaluation results from an inno-vative adaptation of the Advanced Life Support in Obstetrics(ALSO)training course.We modified the traditional ALSO curricu...Objective:The main objective of this initiative was to present evaluation results from an inno-vative adaptation of the Advanced Life Support in Obstetrics(ALSO)training course.We modified the traditional ALSO curriculum in our institution by adding hands-on training in laceration repairs and simulation scenarios on acute maternity care.Methods:The modified ALSO provider course was designed to enhance cognitive and proce-dural skills of health care professionals in managing obstetric emergencies.Forty-nine participants attended this course and completed a posttraining survey.Descriptive statistics were used to de-scribe the participant-reported assessment scores for the ALSO course on three domains(subject knowledge,organization and clarity,and teaching effectiveness)for each of 12 course topics.Results:Evaluation of the results showed a high rate of trainee satisfaction as evidenced by the mean assessment scores across all topics ranging from 4.80 to 4.98(out of 5.00).All trainees said they would refer others to the course.Our modified ALSO course effectively addressed the important needs of primary care physicians involved in maternity care,especially in underserved communities where specialized obstetric care is not readily available.Both simulation scenarios and workshops using simulated human tissue provide a better foundation before formal training.Conclusion:Given the changing legal and regulatory climate,we expect that learning to treat complex obstetric situations on the job will become increasingly risky.With this in mind,both simulation scenarios and workshops using simulated human tissue will provide a better foundation before formal training.展开更多
文摘The aim of presented study was to determine the behavioural response of precopulatory pairs of Gammarus tigrinus exposed to the 17α-ethinylestradiol （EE2）. It was hypothesized that 17α-ethinylestradiol would increase the time needed for a male to re-capture a female. Hypothesis was tested in a laboratory with 20 precopula pairs exposed to different treatment conditions. Paired animals were exposed to two different compound concentrations of 50 ng·L-1 and 500 ng·L-1. The control and solvent control was artificial sea water and artificial sea water with ethanol （the diluent for EE2）. The couples were tested several times under different experimental treatments. The obtained results indicate that EE2 affects the precopulatory mate guarding behaviour of Gammarus tigrinus. EE2 in concentration of 50 ng·L-1 and 500 ng·L-1 prolonged the time needed for re-pairing. However, relative to the controls only EE2 in concentration of 500 ng·L-1 significantly prolonged the time needed for male-female re-coupling. In summary, EE2 affects the reproductive behaviour of Gammarus tigrinus.
文摘Objective:The main objective of this initiative was to present evaluation results from an inno-vative adaptation of the Advanced Life Support in Obstetrics(ALSO)training course.We modified the traditional ALSO curriculum in our institution by adding hands-on training in laceration repairs and simulation scenarios on acute maternity care.Methods:The modified ALSO provider course was designed to enhance cognitive and proce-dural skills of health care professionals in managing obstetric emergencies.Forty-nine participants attended this course and completed a posttraining survey.Descriptive statistics were used to de-scribe the participant-reported assessment scores for the ALSO course on three domains(subject knowledge,organization and clarity,and teaching effectiveness)for each of 12 course topics.Results:Evaluation of the results showed a high rate of trainee satisfaction as evidenced by the mean assessment scores across all topics ranging from 4.80 to 4.98(out of 5.00).All trainees said they would refer others to the course.Our modified ALSO course effectively addressed the important needs of primary care physicians involved in maternity care,especially in underserved communities where specialized obstetric care is not readily available.Both simulation scenarios and workshops using simulated human tissue provide a better foundation before formal training.Conclusion:Given the changing legal and regulatory climate,we expect that learning to treat complex obstetric situations on the job will become increasingly risky.With this in mind,both simulation scenarios and workshops using simulated human tissue will provide a better foundation before formal training.
