采用离子色谱法测定工作场所空气中六价铬的含量。采用碱性微孔滤膜采集工作场所空气样品,经4.0mmol·L^(-1)碳酸钠溶液超声洗脱后,选用Metrosep A Supp 4-250型阴离子色谱柱(250mm×4.0mm)进行色谱分离。以4.0mmol·L^(-1...采用离子色谱法测定工作场所空气中六价铬的含量。采用碱性微孔滤膜采集工作场所空气样品,经4.0mmol·L^(-1)碳酸钠溶液超声洗脱后,选用Metrosep A Supp 4-250型阴离子色谱柱(250mm×4.0mm)进行色谱分离。以4.0mmol·L^(-1)碳酸钠-1.0mmol·L^(-1)碳酸氢钠混合液为流动相,抑制型电导检测器测定。六价铬的质量浓度在0.01~10.0mg·L^(-1)内与其峰面积呈线性关系,方法的检出限(3S/N)为4×10-3 mg·L^(-1)。加标回收率在95.2%~97.6%之间,测定值的相对标准偏差(n=6)在2.2%~3.8%之间。展开更多
Background: Workplace violence (WV) towards psychiatric staff has commonly been associated with Posttraumatic Stress Disorder (PTSD). However, prospective studies have shown that not all psychiatric staff who experien...Background: Workplace violence (WV) towards psychiatric staff has commonly been associated with Posttraumatic Stress Disorder (PTSD). However, prospective studies have shown that not all psychiatric staff who experience workplace violence experience post-traumatic stress. Purpose: We want to examine the longitudinal trajectories of PTSD in this population to identify possible subgroups that might be more at risk. Furthermore, we need to investigate whether certain risk factors of PTSD might identify membership in the subgroups. Method: In a sample of psychiatric staff from 18 psychiatric wards in Denmark who had reported an incident of WV, we used Latent Growth Mixture Modelling (LGMM) and further logistic regression analysis to investigate this. Results: We found three separate PTSD trajectories: a recovering, a delayed-onset, and a moderate-stable trajectory. Higher social support and negative cognitive appraisals about oneself, the world and self-blame predicted membership in the delayed-onset trajectory, while higher social support and lower accept coping predicted membership in the delayed-onset trajectory. Conclusion: Although most psychiatric staff go through a natural recovery, it is important to be aware of and identify staff members who might be struggling long-term. More focus on the factors that might predict these groups should be an important task for psychiatric departments to prevent posttraumatic symptomatology from work.展开更多
Objective: The aim of this study was to examine the effects of a depression prevention program based on stress inoculation training (SIT) for workers of two private companies, by means of a randomized controlled trial...Objective: The aim of this study was to examine the effects of a depression prevention program based on stress inoculation training (SIT) for workers of two private companies, by means of a randomized controlled trial. Method: Ninety three workers of two private companies were assigned to intervention and control groups, and two sessions were conducted in the intervention group of each company at an interval of four weeks. The sessions included lectures on responses to stress and coping skills, problem-solving training, cognitive restructuring training, relaxation, group discussions and self-monitoring. After completing the sessions, two follow-up letters were sent to the participants at two-month intervals. Data from 38 intervention subjects and 39 control subjects were analyzed. Results: There were no major differences between the variables of intervention subjects and control subjects. After two sessions, there was a marginally significant increase of seeking social support in the intervention group (P = 0.052) and a significant decrease of avoidance in both groups (P < 0.05). Concerning the depression score changes, the “Improvement” group of the intervention subjects showed an adjusted OR of 6.83 that was higher compared to the control group, indicating a marginally significant difference (P = 0.083). Conclusion: The results suggest the possibility that the SIT-based program of this study was effective for improving coping and preventing depression. Further research is necessary to develop a depression prevention program adjusted to gender, individual, occupational and other differences of subjects.展开更多
文摘采用离子色谱法测定工作场所空气中六价铬的含量。采用碱性微孔滤膜采集工作场所空气样品,经4.0mmol·L^(-1)碳酸钠溶液超声洗脱后,选用Metrosep A Supp 4-250型阴离子色谱柱(250mm×4.0mm)进行色谱分离。以4.0mmol·L^(-1)碳酸钠-1.0mmol·L^(-1)碳酸氢钠混合液为流动相,抑制型电导检测器测定。六价铬的质量浓度在0.01~10.0mg·L^(-1)内与其峰面积呈线性关系,方法的检出限(3S/N)为4×10-3 mg·L^(-1)。加标回收率在95.2%~97.6%之间,测定值的相对标准偏差(n=6)在2.2%~3.8%之间。
文摘Background: Workplace violence (WV) towards psychiatric staff has commonly been associated with Posttraumatic Stress Disorder (PTSD). However, prospective studies have shown that not all psychiatric staff who experience workplace violence experience post-traumatic stress. Purpose: We want to examine the longitudinal trajectories of PTSD in this population to identify possible subgroups that might be more at risk. Furthermore, we need to investigate whether certain risk factors of PTSD might identify membership in the subgroups. Method: In a sample of psychiatric staff from 18 psychiatric wards in Denmark who had reported an incident of WV, we used Latent Growth Mixture Modelling (LGMM) and further logistic regression analysis to investigate this. Results: We found three separate PTSD trajectories: a recovering, a delayed-onset, and a moderate-stable trajectory. Higher social support and negative cognitive appraisals about oneself, the world and self-blame predicted membership in the delayed-onset trajectory, while higher social support and lower accept coping predicted membership in the delayed-onset trajectory. Conclusion: Although most psychiatric staff go through a natural recovery, it is important to be aware of and identify staff members who might be struggling long-term. More focus on the factors that might predict these groups should be an important task for psychiatric departments to prevent posttraumatic symptomatology from work.
文摘Objective: The aim of this study was to examine the effects of a depression prevention program based on stress inoculation training (SIT) for workers of two private companies, by means of a randomized controlled trial. Method: Ninety three workers of two private companies were assigned to intervention and control groups, and two sessions were conducted in the intervention group of each company at an interval of four weeks. The sessions included lectures on responses to stress and coping skills, problem-solving training, cognitive restructuring training, relaxation, group discussions and self-monitoring. After completing the sessions, two follow-up letters were sent to the participants at two-month intervals. Data from 38 intervention subjects and 39 control subjects were analyzed. Results: There were no major differences between the variables of intervention subjects and control subjects. After two sessions, there was a marginally significant increase of seeking social support in the intervention group (P = 0.052) and a significant decrease of avoidance in both groups (P < 0.05). Concerning the depression score changes, the “Improvement” group of the intervention subjects showed an adjusted OR of 6.83 that was higher compared to the control group, indicating a marginally significant difference (P = 0.083). Conclusion: The results suggest the possibility that the SIT-based program of this study was effective for improving coping and preventing depression. Further research is necessary to develop a depression prevention program adjusted to gender, individual, occupational and other differences of subjects.
