Objective To study CEREC Bluecam digital impressions in tooth preparation of fixed bridge.Methods Totally 80 patients of tooth preparation of 3 units fixed bridge were divided into experiment group (with CEREC Bluecam digital impressions system) and control group (with traditional method) randomly,and then captured the CEREC Bluecam digital impressions and made the dental models after the tooth preparation.Shoulders width,smooth and continuation of shoulders,paleness of shoulders edge,axial chamfers,axial converge degree,occlusal space and common path of insertion were analyzed.Results In the digital impressions in the equality of shoulders width,smooth and continuation of shoulders,paleness of shoulders edge,axial chamfers,axial converge degree,occlusal space and common path of insertion,the experiment group was better than control group:95.0％ (38 cases) vs.62.5％ (25 cases),92.5％ (37 cases) vs.77.5％ (31 cases),97.5％ (39 cases) vs.75.0％ (30 cases),95.0％ (38 cases) vs.72.5％ (29 cases),90.0％ (36 cases) vs.65.0％ (26 cases),100.0％ (40 cases) vs.52.5％ (21 cases),and 97.5％ (39 cases)vs.75.0％ (30 cases),respectively,all (P＜0.05).In the dental models,the experiment group was better than control group:87.5％ (35 cases) vs.60.0％ (24 cases),97.5％ (39 cases) vs.75.0％ (30 cases),90.0％ (36 cases) vs 62.5％ (25 cases),95.0％ (38 cases) vs 75.0％(30 cases),92.5％ (37 cases) vs 70.0％ (28 cases),100.0％ (40 cases) vs.72.5％ (29 cases),and 100.0％ (40 cases) vs.65.0％ (26 cases),respectively,(all P＜0.05).Conclusions The tooth preparation quality with the CEREC Bluecam digital impressions is better than that of the traditional method.

OBJECTIVE To inspect and analyze the cleaning efficacy on surgical instrument after cleaning cycle and maintenance procedures.METHODS The medical instrument was collected from each department based on the weekly usages.Focus on the timing of the cleaning after use and the efficacy of the cleaning methods.Use naked eyes to inspect the cleanness of the medical instrument after each cleaning cycle.RESULTS The combination of the machine washing and manual washing immediately after the surgical procedures provided better cleaning efficacy.It was more difficult to clean the instrument once the dried bio-burden on it or after soaking in the chlorine disinfectant.CONCLUSIONS The correct cleaning methods and instrument care procedures guarantee the cleaning efficacy,disinfections,and the sterilization for the medical instrument.

Objective To analysis the progress in prevention and control of iodine deficiency disorders (IDD) in Dalian and to provide a scientific basis for further prevention and control of the disease.Methods From 2006 to 2010,5 or 9 townships were randomly sampled from each county in Dalian,4 villages were sampled from each selected townships and 15 or 8 households were sampled from each selected villages for collecting salt samples and salt iodine level was determined by direct titration method.Sixty daytime urine samples from pregnant women,breast feeding women,infants and young children were collected,respectively,every year to detect urinary iodine level.From 2007 to 2009,2 to 11 counties were sampled and from each selected county one school was sampled to collect 100 daytime urine samples of children aged 8-10 and iodine content was determined.From 2006 to 2009,2 to 5 counties were sampled,from each selected county 2 to 5 schools were sampled and 100 children aged 8 to 10 in each selected school were sampled to detect intelligence quotient level and the thyroid volume.Results From 2006 to 2010,16 012 copies of households' edible salt samples were monitored; the average iodine content was ranged 29.68-31.51 mg/kg,the rate of qualified iodized salt in household ranged from 97.24％ to 98.42％.A total of 1398 copies of urine samples of pregnant women,486 breast feeding women,473 infants and 502 young children were monitored,and the median value of urinary iodine was 129.3-189.6,114.6-190.6,148.5-298.5 and 144.4-187.3 μg/L,respectively.A total of 1657 urine samples were monitored,1264 intelligence quotient level and 1197 thyroid volume of school-age children were determined,the median urinary iodine,thyroid goiter rate and intelligence quotient level was 217.9-266.7 μg/L,0-3.29％ and 110.4-117.2 μg/L,respectively.Conclusions From 2006 to 2010,the city's households qualified iodized salt coverage rate has reached the national standard for elimination of iodine deficiency disorders.The iodine nutrition of key population and school-age children has reached adequate level,the thyroid goiter rate is less than 5％,and the level of intelligence quotient has increased every year.But the iodine nutrition of breast feeding women in 2009 and 2010,pregnant women in 2010 is inadequate,so iodine nutrition surveillance and health education in pregnant and breast feeding women need to be strengthened in the future.

Objective: To study the extraction process of the total flavones of Pollen Typhae ( Typha angustifolia L.). Methods: The optimum extraction process was selected with the orthogonal design. The content of total flavones was determined by UV spectrophotometry. Results: The significant effects of alcohol concentration, extraction time and extraction times on the extraction of total flavones were discovered. Conclusion: The optimum extraction process was as follows: Pollen Typhae was extracted with 70% alcohol for 3 times, with the solvent volume 8, 6, 6 times amount and extraction time 60, 60, 30 minutes in turn.

Objective To investigate the blood glucose changes in critically ill patients taken continuous renal replacement therapy(CRRT)before treatment and at different time points after treatment. Methods Sixtyseven critically ill patients were enrolled in the study,of whom 13 cases were treated conventionally and assigned as pre-treatment control group,while the other 54 cases undertook CRRT were assigned as CRRT group. The CRRT group were further sub-divided into four groups according to CRRT time((CRRT time ＜6 h group(n = 18),CRRT time of 6 - 12 h group(n = 18),CRRT time ＞ 12 h group(n = 18);or sub-divided into two groups according to circulating blood temperature(≤ 36. 5 ℃ group(n =27)and ＞ 36. 5 ℃ group(n =27));or sub-divided into two groups by sugar substitute fluid replacement solution as the formula group(the standard level of sugar content was 6. 9 mmol/L(n = 27)and sugar-free replacement fluid group(n = 27);or sub-divided into two groups according to the Glasgow Coma score(GCS)(GCS ≤ 8 points group(n = 24)and GCS ＞ 8 group(n = 30). Blood glucose level at different time points were measured. Results The longer CRRT cycle time,lower temperature,sugar substitute fluid replacement fluid worse GCS score corresponded to more dramatic blood glucose fluctuation at different time points in CRRT group,and it took longer time for them to recover to normal blood sugar level Conclusions During the CRRT process insulin secretion was suppressed and led to increase of blood sugar. In most cases the blood glucose returns to normal after CRRT treatment over time,but a small number of cases require clinical intervention.

Objective To investigate the relationship of TCM constitution and syndrome elements based on patients with hyperhomocysteinemia. Methods A survey was conducted among 1316 patients with diabetes, coronary disease, hypertension and cerebral infarction. Totally 326 patients with hyperhomocysteinemia were incorporated in diagnostic data and their constitutions were determined. At the same time, syndrome elements identification method for syndrome elements was applied for judgment, and consistency of the constitution and syndrome elements was analyzed. Results The survey showed that prevalence rate of population with hyperhomocysteinemia was 24.77%;there were 6 cases with mild nature, and 320 cases with biased constitution;phlegm dampness, blood stasis, qi deficiency of constitutions 110 cases, 73 cases and 59 cases, respectively;blood stasis, phlegm, qi deficiency, and dampness were the main syndrome elements of hyperhomocysteinemia, of 100 cases, 98 cases, 73 cases and 59 cases, respectively;the consistency of phlegm dampness constitution and syndromes of phlegm was the most obvious (Kappa=0.89, P<0.05). Conclusion Phlegm dampness, blood stasis, and qi deficiency were the most common constitutions of hyperhomocysteinemia;blood stasis, phlegm, qi deficiency and dampness were the main syndrome elements of hyperhomocysteinemia patients. The two results were consistent, and the consistency of phlegm syndrome and phlegm dampness constitution was the most obvious.

Objective To study the chemical constituents in the leaves of Nelumbo nucifera. MethodsCompounds were repeatedly purified by chromatography and structures were elucidated by physicochemical properties and spectroscopic analyses. Results Nine alkaloids were isolated and identified as 2-hydroxy-1-methoxy-6-methyl-6a,7-dehydroaporphine (1),armepavine (2),dehydroroemerine (3),dehydronuciferine (4),2-hydroxy-1-methoxyaporphine (5),liriodenine (6),pronuciferine (7),roemerine (8),and nuciferine (9). Conclusion compound 1 is a new aporphine alkaloid named nelumnucine.

Objective To prepare the single chain antibody against N protein of SARS-CoV. Methods With N protein of SARS-CoV expressed in E.coli as antigen, we obtained the single chain antibody against N protein by screening the phage display library of human single chain antibodies. Results The anti-N protein antibody didn’t cross-interacte with BSA and the short peptide containing 6 histidines. The specific interaction between the antibody and N protein was inhibited by the anti-N protein monoclone antibody from immunized mice. ConclusionThe single chain antibody we got is specific to N protein of SARS-CoV,it can be a candidate antibody for fast detection of N protein of SARS-CoV and SARS virus particles in clinical trial study of SARS pathogenesis.

Objective: To study the adscription of plasma effective constituents of rat after oral administration of alkaloid fraction of Nelumbo nucifera.Methods: Based on the established HPLC analytical method of plasma effective constituents,analysis and comparison were carried out among HPLC profi les of plasma samples obtained after oral administration of alkaloid fraction of Nelumbo nucifera,blank plasma,alkaloid fraction of Nelumbo nucifera.Results: Sixteen compounds were detected under the method,three of them were architypes of compound contained in alkaloid fraction of Nelumbo nucifera,and the others were metabolites.Through the comparison of the UV spectra,seven metabolites remain essential structure because the max wavelength was same to the architypes’,the other six metabolites’ structure changed greatly.Conclusion: Through the study of the adscription of plasma effective constituents of rat after oral administration of alkaloid fraction of Nelumbo nucifera,the structure of metabolites can be conjectured,which may be helpful to study the ADME and mechanism of action.

Objective:To establish a method for controlling the quality of the stilbene fraction of Polygonum multiflorum T hunb. Methods: The contents of total stilbene and 2,3,5,4,-tetrahydroxy-stilbene-2-O-?-D-glucoside were determined by UV and HPLC respectively. Results: As a reference, 2,3,5,4,-tetrahydroxy-stilbene-2-O-?-D-glucoside had a good linear relationship in the range of 3.04-15.20?g/ml and 0.1032-0.6192?g, the linear regression equation was Y=0.0588X+0.0026(r=0.9998) and Y=3614089.84X+14475.21(r=0.9997), the average recovery was 99.95% with RSD=2.11%(n=6)and 100.08% with RSD=2.83%(n=6)for the determination of total stilbene and 2,3,5,4,-tetrahydroxy-stilbene-2-O-?-D-glucoside respectively. Conclusion: The determination results of 3 batches of sample showed that the method was simple, convenient and accurate, and could be used for the quality control of the stilbene fraction of Polygonum multiflorum Thunb.