Optimizing concentration of bioactive glass that promotes early enamel caries remineralization / 天津医药

Objective To explore the optimum concentration of bioactive glass that promotes early enamel caries remineralization. Methods Fresh bovine incisors were selected and used for enamel specimen preparation. All specimens were randomly divided into two groups:micro hardness group and fluorescence group. Both groups were further divided into 3%, 6%and 9%groups. These specimens were placed in containers with demineralization liquid at 37℃for 72 hours. Then they were treat with 3%, 6%and 9%bioactive glass solution respectively twice a day for 5 minutes each. Samples in all three groups were dipped circularly into an artificial demineralization solution and an artificial saliva solution for 15 days. The mi?crohardness of enamel surface was measured before and after demineralization and remineralization. The different value of microhardness before and after remineralization was calculated. The thickness of fluorescence beneath the surface of early enamel caries was observed to evaluate the extend of remineralization effect. Results The difference in value of micro hard?ness in 6%group was the highest while that in 3%group was the lowest. The differences were significant. The difference in value of demineralization depth in 6%group was greater than those in 3%and 9%groups (P<0.05). There was no statistical?ly significance between those in 3%group and 9%group. Conclution The optimum concentration of bioactive glass solu?tion that promotes the remineralization of early enamel caries is 6%, which is ideal for remineralization of early enamel caries.

Impact of intervention on tobacco related knowledge, attitudes and practice of smokers / 中华流行病学杂志

<p><b>OBJECTIVE</b>To evaluate the impact of intervention on tobacco related knowledge, attitudes and practice of smokers.</p><p><b>METHODS</b>An observational study was conducted among the smokers seeking counsel at smoking cessation clinic in our hospital from October 2008 to August 2013. First, a face to face counsel and mental intervention for more than 30 minutes was given to smoker, then 4 interventions through telephone call for 15-20 minutes for each time were conducted 1 week later, 1 month later, 3 months later and 6 months later, respectively. The controls were smokers receiving health examination in our hospital. No interventions were conducted among them. The tobacco related knowledge, attitudes and practice at baseline survey and follow up 1 year later were compared between intervention group and control group.</p><p><b>RESULTS</b>The intervention group included 414 smokers and the control group included 213 smokers. Intentional analysis indicated that the awareness/acceptance rates of 5 items about tobacco related knowledge and attitudes at follow up 1 year later was higher than those at baseline survey in intervention group. The smoking cessation rate was 27.3% in intervention group and 4.7% in control group. Multivariate logistic regression analysis indicated that the smoking cessation rate was positively correlated with intervention, female, highly nicotine dependence and positive change of tobacco related knowledge and attitudes (smoking can cause heart disease, all kinds of tobacco advertisements should be prohibited, smoking waste money and restaurant should be smoking free) with OR (95% CI): 2.85 (2.00-4.07), 3.34 (1.23-9.07), 2.78 (1.64-4.72), 2.30 (1.03-5.15), 5.33 (1.47-19.32), 6.32 (1.56-25.62) and 10.47 (2.25-48.84), respectively.</p><p><b>CONCLUSION</b>The awareness rate of tobacco related harm was high among the smokers seeking counsel at smoking cessation clinic. Systematic smoking cessation intervention can improve smokers' tobacco related knowledge and attitudes and increase smoking cessation rate.</p>

Effectiveness of Varenicline with counseling programs on smoking cessation in a targeted clinical setting in China / 中华流行病学杂志

<p><b>OBJECTIVE</b>To evaluate the effectiveness of Varenicline for smoking cessation in a community-based smoking-cessation-clinic (SCC) in Chinese smokers.</p><p><b>METHODS</b>A prospective observational study was conducted in Beijing, China. 799 smokers (762 men and 37 women) were assessed on data gathered from structured questionnaires at baseline and follow up programs at 1, 3 and 6 months. Trained physician counselors provided free individual counseling and follow-up interviews with brief counseling for all the subjects. 272 subjects were additionally prescribed Varenicline according to their own choice and reported data were compared to those without Varenicline. Outcomes were self-reported, regarding the 7-day point prevalence on abstinence rate and continuous abstinence rates at 1, 3 and 6 month follow-up periods.</p><p><b>RESULTS</b>At 6-month and by intention-to-treat, the 7-day point prevalence on abstinence rate with Varenicline and counseling, was significantly higher than the group with counseling only (34.6% versus 23.1%; OR = 1.75, 95% CI: 1.27-2.42;P < 0.001). The 3-month continuous abstinence rate at 6 month was higher in the group with Varenicline(31.3% versus 18.2% ;OR = 2.04, 95% CI:1.46-2.86;P < 0.001). Varenicline also showed better outcomes at 1 and 3 month follow-up.</p><p><b>CONCLUSION</b>Varenicline prescription in the smoking cessation clinic appeared to be effective that doubled the rates of quitting among Chinese smokers in the practice at a community-based SCC.</p>

Predictors for 'successful quitting smoking' among males carried out in a smoking cessation clinic / 中华流行病学杂志

<p><b>OBJECTIVE</b>To investigate the predictors for 'quitting' among male smokers in a smoking cessation clinic.</p><p><b>METHODS</b>The target population consisted of smokers who volunteered to seek treatment for cessation at our clinic in Beijing. Smokers received face-to-face counseling and psychological intervention at the first visit by trained physicians and standardized telephone discussion, was carried out with counselors at 1 week, 1/3/6 months a follow-up study. The main outcomes would involve 'successful quitting' at the 7-day point, continuous quit rates at 3 and 6 months as well as the predictors of 'quitting'.</p><p><b>RESULTS</b>From October 2008 to December 2012, we collected 355 eligible male smokers among whom 255 had completed the 6-month follow-up program. Results from the analysis (n = 255) showed that the quitting rates at the 7-day point and 3 months were 34.9% and 25.5%, while the rates were 25.1% and 18.3% among the 355 smokers who had the intention for treatment. Data from the stepwise logistic regression model analysis showed that lower exhaled CO level at the first visit, higher perceived confidence in quitting, lower expenditure on cigarettes and had diagnosed tobacco-related chronic diseases by physicians, were important predictors for quitting smoking. The main reasons of failure to quit were addiction of tobacco cigarette, craving for cigarettes to relieve pressure from work, peer influence from other smokers, lack of mental preparation and perseverance to quit, etc.</p><p><b>CONCLUSION</b>Smokers who smoked less cigarettes, had higher perceived confidence in quitting and had physician-diagnosed tobacco-related chronic diseases seemed easier to quit. Regular follow-up intervention services for smokers should be established to enhance the motivation for quitting so as to create a favorable environment for the smokers.</p>

Predictive equations of lung function for adults in north China urban areas / 南方医科大学学报

<p><b>OBJECTIVE</b>To establish predictive equations of lung function for adults in urban areas in north China.</p><p><b>METHODS</b>A survey was conducted in 600 male and 600 female healthy adults in the urban areas in north China. Five flow-volume test parameters were measured including forced vital capacity (FVC) and forced expiratory volume in one second (FEV1). Stepwise multiple regression was carried out to establish the predicative equations for the parameters for male and female adults separately. The predicted values from these equations and those from other commonly used equations (such as ECCS equation and Knudson equation) were compared with the actual measurements in pulmonary function tests.</p><p><b>RESULTS</b>Four flow-volume test parameters, namely FVC, FEV1, 25% forced expiratory flow (FEF25%), and FEF75%, showed obvious differences between the male and female adults, while FEV1/FVC was not correlated with gender. Multiple regression analysis showed that FVC, FEV1, FEF25% and FEF75% were positively correlated with height and negatively with age, and FEV1/FVC was negatively correlated with both height and age. The parameters were not affected by body weight. The predicted values from our equations were closer to the actual measurements than those calculated from other equations.</p><p><b>CONCLUSION</b>The equations we established are more appropriate than the generally used equations for predicting lung functions in adults in north China urban areas.</p>

Effect of radix salviae miliorrhizae on acute lung injury caused by inhalation of rocket liquid propellant / 中华急诊医学杂志

Objective To investigate the effect and mechanisms of radix salviae miliorrhizae (RSM)on acute lung injury (ALI)caused by inhalation of high concentration rocket liquid propellant unsymmetrical dimethylhydrazine (UDMH)and dinitrogen tetroxide (N_2O_4). Methods Forty-two rats were divided into three groups:the control group,the inhalation group and the inhalation plus treatment group (RSM group).The latter two groups were inhaled with UDMH 0.98 g/m3 for ten minutes and N_2O_4 0.19 g/m3 for ten minutes.After the inhalation,the rats in RSM group were treated with 9 g?kg -1 RSM intravenously immediately,and were injected into peritoneal cavity with RSM at a dose of 3 g?kg -1 at the 3 hours after the first injection.The rats in other group were treated with equivalent saline.All rats were killed after the observation for six hours.Lung wet to dry ratio (W/D),LDH and total protein in bronchoalveolar lavage fluid (BALF),the activities of superoxide dismutase (SOD)and glutathione peroxidase (GSH-Px)in lung tissue,and the malondialdehyde (MDA)of plasma were measured.Histopathology was observed.Results The lung W/D ratio,LDH and total protein in BALF,MDA of plasma were increased in the inhalation group,while the activities of SOD and GSH-Px in lung tissue were decreased.The histopathology of the inhalation groups rats showed that exudation within alveolar space and interstitial thicken of septa was prominent.In the RSM group,above index were improved,and the degree of lung injury in histopathology was relieved.The lung W/D were related to the activities of SOD and GSH-Px in lung tissue,correlation coefficient were-0.661(P

Protective effects of anisodamine on ventilator-induced lung injury in rats / 解放军医学杂志

Objective To study the protective effects of anisodamine (ADM) on ventilator-induced lung injury (VILI) in rats. Methods After anesthesia was induced and tracheostomy was performed, 36 healthy male Sprague-Dawley rats were randomly assigned into three groups: control group (group A, VT=8ml/kg); injury group (group B), in which the animals received mechanical ventilation with large tidal volume (VT=40ml/kg); and ADM protective group (group C), in which the animals received the same amount of tidal volume and same respiratory rate with mechanical ventilation as in group B, but were pre-treated with ADM (15mg/kg?iV) at 24h, 12h, 0h time points before ventilation. Arterial blood gases were measured every one hour, and neutrophils in bronchoalveolor lavage fluid (BALF) were counted. Wet to dry (W/D) weight ratio of left lung was determined, and the content of TNF-? and IL-1? in BALF and blood, malondialdehyde (MDA), superoxide dismutase (SOD) levels in the pulmonary tissue and blood were measured respectively. The histopathological changes in pulmonary tissues in the three groups were compared. Results The oxygenation index (PaO2/FiO2) of the animals in group B was significantly lower than that in group A and C, and the BALF neutrophil count was remarkably increased in group B. W/D value of group B was significantly higher than that of group A and C. The levels of TNF-?, IL-1? in BALF were remarkably increased in group B , but decreased in group C . MDA levels in pulmonary tissue and blood in group C were lower than that of group B, but SOD level in group C was significantly higher than that of group B. Histopathologic findings demonstrated there were more neutrophil infiltration and destructive change in the alveolar wall in group B than in other groups. Conclusion ADM appears to have obvious protective effects on VILI through anti-inflammation and antioxidation.

THE FATTY ACID COMPONENTS OF FISH OILS AND CHANGES DURING STORING / 中国海洋药物

In this paper,the fatty acid compositions of fish oils were analyzed and ox-idative property was evaluated. The result showed that the fatty acid composition varied greatly with fish. The content of PUFA(w3) of caplin oil,herring oil,mackeral oil menhaden oil was 11. 3%, 14. 3%, 21. 0%and 27. 6% respectively; the content of SFA was 17. 52%, 21.2%, 24. 12%and31. 15%; the content of MUFA was 62. 46%, 52. 9%, 40. 04%and 26. 26%. The content of EPA and DHA was about 15%-35%in anchovy oil,especially the DHA content (18- 44%)of anchovy oil in China was higher than EPAC13. 66%) and low content of C20,i and C22,1 But the DHA content of anchovy oil in South Africa,South Chile , North of Chile,Califor. US and Peru was lower than EPA. The content of SFA of fish oil increased with the storage and the content of PUFA in reverse. Temperature is an important factor affecting oxidation of fish oil.