Workplace

Aldehydes ; chemistry ; pharmacology ; Chromatography, High Pressure Liquid ; DNA Adducts

Objective To make a passive personal sampler for the determination of the styrene in the air. Methods To make a passive personal sampler for the determination of the styrene in the air. Results Under the condition of wind velocity of 100-600 cm/s, relative humidity of 40%-80% and temperature of 10-40 ℃, the sampling flux of the passive sampler was 61.8 ml/min, the capacity was 5.95 mg, the shortest sampling time was 30 min, the self life was at least 30 days, the storage stability was at least 14 days, the RSDs were 8.07%-9.37%. Conclusion This new kind of passive personal sampler can be used as a new device for the determination of the styrene in the air.

Manganese(Mn) is one of the essential trace elements in biologic metabolism.With proper quantity,Mn acts as some enzymes’active groups,reactivators,and participates in the physiological functions of central nervous system.Overdose exposure to Mn in industry may result in occurrence of occupational manganism,which can cause damage of many aspects of the body such as nerve,immunity and reproduction.The aim of present essay is to review the current studies on nerval behavior function and biomarkers of manganism both in China and other countries.

The association between fasting plasma ghrelin levels and insulin resistance and blood pressure (BP) in octogenarians was investigated in this study. A total of 487 unrelated octogenarians (including 203 men and 284 women) were enrolled in this cross-sectional study at the Healthy Care Center of Shanghai East Hospital, Tongji University, China, from October 2008 to April 2009. Plasma ghrelin was determined by using the enzyme linked immunosorbent assay (ELISA). Insulin sensitivity was assessed using the homeostasis model of assessment-insulin resistance (HOMA-IR). The age of the participants ranged from 80 to 89 years (mean=83.9+/-4.8 years) with a body mass index (BMI) of 25.3+/-4.9 kg/m(2). Plasma ghrelin levels were 20.94+/-5.34 mug/L, being 20.89+/-5.53 mug/L in men and 21.38+/-3.73 mug/L in women respectively. Plasma ghrelin was not associated with systolic (P=0.981) or diastolic (P=0.724) BP, waist circumference (P=0.278), fasting insulin (P=0.246), fasting blood glucose (FBG) (P=0.693) and HOMA-IR (P=0.232). In the control cohort, no significant differences in plasma ghrelin were found between genders (P=0.489), and among subjects with hypertension (BP>140/90 mmHg) (P=0.284) and type 2 diabetes (P=0.776). In conclusion, fasting plasma ghrelin levels are not directly correlated with insulin resistance and BP among octogenarians.

Objective To observe differences between repeat and written response in speech recognition tests of short Mandarin monosyllable lists. Methods 12 normal-hearing subjects were tested by 6 short monosyllabic lists. The subjects should repeat and write down.the contents of the tests at the same time, the tester monitors au-rally and records the subjects' reactions. The speech recognition scoring error under different responses at different presentation levels could be obtained by comparing the records of the subjects with the tester. Results The speech recognition scoring of repeat and written response were highly correlated with each other (P<0.01). However, 19(26.4%) out of 72 pairs of test records were inconsistent. The error range of them was from -5% to 10%. When the presentation level was 5 dB HL, the difference among the speech recognition scoring was significant statistically, but not significant when the presentation level at 20, 15, 10 and 0 dB HL. Conclusion The test results of speech audiometry are impacted by different respond methods. In the open-set test, it's supposed that the subjects should make notes while repeating the contents of the tests, then compare with the aural monitoring records of the tester to keep the reliability of the test.

Child, Preschool ; Ear, External ; abnormalities ; Humans ; Male ; Nasopharynx ; abnormalities

Objective To study the value of magnetic resonance imaging(MRI) in the diagnosis and treatment of pelvic neoplasms. Methods The patients who were suspected of malignant pelvic neoplasms were performed MRI.The surgical approach was determined according to the MRI results.The MRI results were compared with operation findings and pathological reports. Results The MRI results were consistent with operation findings and pathological reports in 22 cases highly suspected of pelvic neoplasms and 15 cases with abnormal endometrial echo.Therapeutic regimen was designed for 5 cases with uterine cervix cancer according to MRI stages,and favourable surgical curative effects were obtained. Conclusion MRI provides a reliable guideline for surgical approach and may improve the outcomes.

Objective To analyze the clinical efficacy of endovenous laser treatment combined with transilluminated powered phlebectomy for great saphenous varicosity and summarize the experiencein order to achieve better results.Methods From January 2014 to June 2015,45 patients (52 limbs,including 17 males and 28 females,aged 36 to 68 years) diagnosed as great saphenous varicosity received endovenous laser treatment combined with transilluminated powered phlebectomy.Thirty-eight cases was unilateral great saphenous vafcose veins,7 cases was bilateral large saphenous varicose veins.The clinical efficacy was analyzed.Results All cases were performed successfully.The mean operation time was (68.4 ± 15.1) minutes,the average bleeding volume was (23.5 ± 10.7) ml,the number of mean operative incision quantity was (5.8 ± 1.9) and the average hospitalization time was (5.9 ± 1.6) days.All patients had no serious complications.During a mean follow-up time of 22 months (12 to 30 months),only one patient recurred.Conclusions Endovenous laser treatment combined with transilluminated powered phlebectomy for great saphenous varicosity is effective and safe.It also has the advantages of shorter operation time,less bleeding,shorter hospitalization time,small trauma and better cosmetic results.

Acute Disease ; Adenoviridae Infections ; epidemiology ; Adolescent ; Child ; Child, Preschool ; China ; epidemiology ; Humans ; Infant ; Infant, Newborn ; Respiratory Tract Infections ; epidemiology ; virology