Dental educations in China and USA have different histories and systems even if they are similar in some respects.In this paper,by taking school of dental medicine in Harvard university as an example,dental educations in China and USA were compared with each other concerning the enrollment requirement,school system,course arrangement,teaching methods,clinical practice,elc.Based on the comparison,advices on how to improve and reform our dental education system were provided by learning from the advantages of dental education in USA.

Animals ; Dementia, Vascular ; blood ; psychology ; Erythrocyte Count ; Learning ; drug effects ; Male ; Memory ; drug effects ; Peptides ; pharmacology ; Rats ; Rats, Sprague-Dawley

Adolescent ; Adult ; Benzene ; toxicity ; China ; Female ; Humans ; Leukemia ; chemically induced ; diagnosis ; Male ; Middle Aged ; Occupational Exposure ; Young Adult

Animals ; Ear Canal ; surgery ; Female ; Gene Expression ; Hypothalamus ; metabolism ; Nerve Block ; Pregnancy ; RNA, Messenger ; genetics ; Rats ; Rats, Sprague-Dawley ; Receptors, N-Methyl-D-Aspartate ; genetics ; metabolism

Animals ; Female ; Gene Expression Regulation, Developmental ; Inferior Colliculi ; metabolism ; N-Methylaspartate ; genetics ; metabolism ; RNA, Messenger ; genetics ; Rats ; Rats, Sprague-Dawley ; Receptors, N-Methyl-D-Aspartate ; genetics ; metabolism

Acupuncture Therapy ; Adult ; Combined Modality Therapy ; Female ; Humans ; Male ; Musculoskeletal Manipulations ; Osteitis ; pathology ; therapy ; Sacroiliac Joint ; pathology ; Sclerosis ; therapy ; Young Adult

[Objective] To explore the effects of mycocide and insecticide on indoor air quality in archives.[Methocls] The levels of camphor, formaldehyde and 2, 2-dichlorovinyldimethyl phosphate (DDVP) in indoor airwere determined in 17 archives. [Results] The average concentration of camphor in indoor air was 1.00mg/L inarchives applying synthetic camphor, 0.74 mg/m3 in archives applying commercialized mycocide (the main compo-nents were synthetic camphor and pyrethrin ), and 0.14 mg/m3, applying natural camphor. The concentrations offormaldehyde reached 0.297 mg/m3 at the 10th day after the co-fumigation by formaldehyde and DDVP. At thesametime, DDVP was not found in indoor air of archives.[Conclusion]The pollution of formaldehyde and camphorin indoor air of archives should be paid more attention to.

Objective To investigate the volatile organic compounds (VOCs) contamination in the water sources of city drinking water in Heilongjiang Province. Methods Fifteen water samples were collected from 6 water sources in May to June in 2006. The method in EPA524.2 of the United States was referred and the gas chromatography-mass spectrometry was used to determine VOCs. Results The precision and accuracy of this method could meet the determination. The rates of recovery were 63%-118%, RSD was ≤26%. Five kinds of VOCs in the water samples were detected, they were 1,2-dichloroethane, chloroform, toluene, styrene and isopropylbenzene. Conclusion The investigation shows that the volatile organic compounds are detected in the water sources of city drinking water in Heilongjiang Province.

Objective To study the changes of pulmonary function in patients with active rheumatoid arthritis(RA).Methods Sixty patients with active RA were divided into low lung function group and normal lung function group by detecting their pulmonary function.The clinical symptoms and signs,laboratory indicators,health index(HAQ) score,disease activity score(DAS-28) and regulate T-cells(Treg) were observed.Results In 60 patients with active RA,42 cases(70%) were lower lung function and 18 cases(30%) were normal lung function.Compared with normal lung function group,Hb of low lung function group significantly lowered(P

Objective To establish a laboratorial test method of soaking the sample of hygienic protection beaded paint contacted with drinking water. Methods The samples of hygienic protection beaded paint were chosen to conduct the soak experiment, incontinuous soak of 4 times for 96 hours(exchange the soaking aqua every 24 hours), continuous soak of 4 times for 96 hours were conducted respectively, and then compared these experimental results with that which was obtained with the standard soak method(30 d,6 times) stipulated by The Examination Norm of Life Drinking Water (2001). Results The results of standard soak method(30 d,6 times)showed that chroma, smell, visible objects, volatility hydroxybenzene, arsenic, chromium, cademium, aluminium, lead, carbon tetrachloride, formaldehyde and etc. were all under the determination limit. Along with the increment of days of soak, the mean values of changed quantity of turbid degree, deliquescent total solid, pH value, mercury,and chlorpicrin concentration all showed a downtrend. When the incontinuous and the continuous soak of 4 times for 96 hours were finished, the results showed that chroma, smell, visible objects, volatility hydroxybenzene, arsenic, chromium, cademium, aluminium, lead, carbon tetrachloride, formaldehyde, and etc. were all under the detection limit. Along with the increment of days of soak,the mean values of changed quantity of turbid degree, deliquescent total solid, pH value, mercury, and chlorpicrin concentration all presented an decreasing trend, oxygen consuming content, pH value presented a fluctuant trend. The 4 times and 96 hours incontinuous soak procedure dissolved slightly more objects than the 4 times and 96 hours continuous soak procedure did. Conclusion The method of 4 times and 96 hours incontinuous soak should be recommended as the standard laboratorial method for soaking the hygienic protection beaded paint which will be contacted with drinking water.