Cyclic voltammetry shows that, in a supporting ele ctrolyte of NaOH,riboflavine tetrabutyrate（RT）has a pair of cathodic and anodi c peaks at Hg electrode. The peak potentials Epc=Epa=-0.64　 V（vs.Ag/Agcl）.　The adsorptive characteristics of RT are explored in detai ls with various methods.　The adsorbed species is most probably neutral molecule of RT.The saturated adsorption amount of RT at Hg electrode is 5.42×10-11 　mol/cm2 and every RT molecule occupied 3.06　nm2. On the surface of HMDE ，the adsorption of RT obeys Frumkin dasorption isotherm. The adsorptive coeffic ient β，the attractive factor γ are 4.60×105，1.10 and the adsorption free energy ΔG, is　－32.30　kJ/mol, respectively. The electrode proc ess kinetic behavior has also been studied by using cyclic voltammetry. Under th e experimental conditions the rate constants for electron transfer are determine d. The values of ks are in good agreement with literature′s results.

Objective To investigate radiological diagnosis of ossifying fibroma of long bone.Methods The imaging features in 16 patients with ossifying fibroma of long bone confirmed by pathology and surgery were analysed.All 16 patients underwent radiographic examinations,of them,CT was performed in 8 patients,MR was performed in 3 patients.Results In 16 cases,ossifying fibroma was accurately diagnosed by X-ray in 11/16 cases,by CT in 7/8 cases.MR imaging was commonly superior to CT in showing the relationship between the lesions and isthmus.Conclusion CT scan can improve the diagnosis of ossifying fibroma of long bone,and is better in demonstrating the extension of fesions than X-ray plain film,which is important for guiding clinical treatment,and MRI can be used as an important supplemental method.

Objective To investigate the relationship of resting heart rate (RHR)and dyslipidemia in the elderly.Methods 3 919 cases of cerebrovascular disease risk factor screening in Renqiu permanent residents aged 60 -70 years were selected,excepted cases of atrial fibrillation and hyperthyreosis and received lipid -lowering and slowing the heart rate drugs as the research subjects,mean age 64(62,67)years,the rates of male and femal were 44.0% and 56.0% respectively.They underwent face -to -face health questionnaire,blood pressure and RHR meas-urement,anthropometric and laboratory tests.According to the RHR,they were divided into four groups:RHR1:<60 times/min,RHR2:>60 times/min and <70 times/min,RHR3:>70 times/min and <80 times/min,RHR4:>80 times/min.The effect of RHR on dyslipidemia was analyzed by multivariate logistic regression analysis.Results The high TC,TG,and the prevalence of high LDL -C increased gradually with heart rate,the differences were statisti-cally significant (all P <0.001).The prevalence low HDL -C and HDL -C levels had no obvious statistically differ-ences.TC,TG,and LDL -C and RHR were positively correlated.RHR1:<60 times/min was set as control group,the correction of gender,age,smoking,drinking,lack of physical activities,hypertension,diabetes,coronary heart disease, stroke or TIA,overweight,abdominal obesity,systolic pressure,diastolic blood pressure,fasting plasma glucose,insu-lin,uric acid,high TC in 60 -70 times/min,70 -80 times/min,and the risk of more than 80 times/min,respectively (OR =1.304,95%CI:0.983 -1.73),(OR =1.579,95%CI:1.195 -2.088),(OR =1.677,95%CI:1.258 -2.237).Conclusion The RHR and the prevalence of dyslipidemia is related,medical workers need to know the rela-tionship between RHR and dyslipidemia,increase the focus on RHR and intervention,in order to effectively control the occurrence of dyslipidemia and cardio -cerebrovascular disease,especially cholesterol heighten.

Objective To investigate the hyperuricemia(HUA)and the correlation of blood lipids of the 60 -70years peple in Renqiu area,and to provide the basis for guiding prevention and treatment of the elderly disease the region.Methods According to the cluster random sampling method,Renqiu permanent residents with the age of 60 to 70 years were selected as a screening object.In the total 5 010 cases screened object,2 163 were male(43.2%),2 847 were female(56.8%),with an average age of(64.29 ±3.05)years.The data of blood uric acid and total cholesterol(TC), triglyceride(TG),high -density lipoprotein(HDL -C),low -density lipoprotein(LDL -C)were collected.The rela-tionship between blood uric acid and blood lipids were analyzed.Logistic regression method was used to analysis the relationship between the hyperuricemia and lipids components.Results The overall prevalence of hyperuricemia in Renqiu was 6.1%(9.8% in male,3.2% in female).In men HUA group,the levels of blood uric acid,TG and LDL-L were 464.10(438.00 -508.65)μmol/L,1.54(1.00 -2.19)mmol/Land 2.66(2.25 -3.22)mmol/L,which were higher than those of normal uric acid group of 294.00(249.90 -338.08)μmol/L,1.13(0.84 -1.65)mmol/L and 2.57(2.12 -3.01)mmol/L(P <0.05).In women HUA group,the levels of blood uric acid,TG and LDL -L were 454.15(434.15 -480.78)μmol/L,2.14(1.47 -3.18)mmol/L and 2.96(2.52 -3.76)mmol/L,which were higher than those of normal uric acid group of 250.80(209.00 -299.80)μmol/L,1.53(1.10 -2.20)mmol/L and 2.87(2.40 -3.33)mmol/L(P <0.05).Logistic multi -factor regression analysis showed that TG was an independ-ent risk factor for hyperuricemia,and that HDL -L and gender were protective factors.Conclusion Hyperuricemia is closely associated with blood lipid,especially with TG and HDL -L,so we could screening HUA by blood lipid,which can reduce the occurrence of cardiovascular disease effectively.

AIM: To explore the relationship between caspase activation and the evasion of Legionella from macrophage elimination through a Legionella-infected macrophage model. METHODS: After infected by Legionella, the activity of caspase 3 in macrophages was analyzed by confocal microscopy as well as fluorescence reader. Growth and replication of Legionella in macrophage was assayed. Replication of Legionella was analyzed again to see the effect of caspase 3 inhibition on the growth of Legionella after use of caspase 3 inhibitor. RESULTS: Both confocal microscopy and caspase 3 fluorescent substrate analysis showed that Legionella virulent strain had powerful capability of activating caspase 3 while the mutant non-virulent strain did not have this capability. The virulent strain highly replicated in macrophages and the replication was significantly inhibited by caspase 3 inhibitor. CONCLUSION: Our results indicate that the intracellular caspase 3 is activated shortly after infection by Legionella virulent strain. The evasion of Legionella from the elimination of macrophages may be mediated by caspase 3 activation to a great degree.

Objective To study the relationship between metabolic syndrome (MS) and anterior circulation infarction (ACI). Methods 271 ACI patients (166 men and 105 women) who fulfilled the diagnostic criteria of China Guideline for Cerebrovascular Disease Prevention and Treatment were enrolled. 147 control subjects (67 men and 80 women) without the clinical signs of cerebral infarction but with detailed case history, physical examination and CT or MRI were also selected. The prevalence and risk of MS were observed in the ACI and control group. MS was defined with the modified criteria in Chinese. Results The prevalence of MS in the ACI group and control subjects was respectively 43.17% and 19.05%. The prevalence of MS was significantly higher in the ACI group as compared with the control subjects (P<0.01). The component level of MS were significandy different between the two groups (P< 0.05). MS was associated with a 3.7 fold higher risk of ACI (P<0.01). Conclusions There is a close relationship between MS and ACI. MS is an important risk factor of ACI.

Objective To investigate the potential relationship between the characteristics of atherosclerotic plaque of carotid artery and cardiovascular events in a senior cohort of Renqiu region,Hebei.Methods A random cluster sampling method was used to identify study population among 60 -70 years old residence in Renqiu region, Hebei.In the face of health questionnaire survey,neck vascular ultrasound examination,a total of 4 413 cases,inclu-ding 1 876 males and 2 537 females,the occurrence of carotid artery plaque and stenosis were detected by ultrasound. Carotid ultrasound was used to identify the characteristic of atherosclerotic plaque of bilateral carotid arteries,which were categorized as with and without plaque,single and multiple plaque,homogenous and heterogeneous plaque,and with and without stenosis.Cardiovascular events were defined as composite events of myocardial infarction,cardiovas-cular death,fatal or non -fatal stroke during the subsequent 2 years follow -up after initial evaluation.Multiple Logis-tic regression was performed to identify the association between the characteristics of bilateral carotid arteries and cardiovascular events.Results A total of 4 413 case enrolled in the study.With carotid ultrasound,2 438 cases (55.2%)were found to be with atherosclerotic plaque formation and 235(5.3%)were with carotid artery stenosis. The proportion of single,multiple,homogeneous and heterogeneous plaques were 1 024cases(23.2%),1 114cases (32.0%),1 106cases(25.1%)and 1 333cases(30.2%),respectively.Among them,the single plaque and new cardiovascular and cerebrovascular events occured in 83 cases(P =0.168),the multiple plaques and new cardiovascular and cerebrovascular events occured in 161 cases(P <0.001 ),the homogeneous patch and new cerebral vascular events occured in 98 cases(P =0.032),the non -homogeneous patch and new cerebral vascular events occured in 146 cases(P <0.001),the stenosis and cerebral vascular events occured in 42 cases(P <0.001).Taken the new onset cardiovascular and cerebrovascular events as dependent variable,the single factor analysis showed that the carotid plaques(χ2 =14.969,P <0.001 ),and the multiple plaque(χ2 =22.509,P <0.001 ),the carotid artery stenosis (χ2 =27.561,P <0.001),the homogeneous plaque(χ2 =4.606,P <0.050),the non -homogeneous plaque(χ2 =18.301,P <0.001),the history of hypertension(χ2 =33.709,P <0.001),the high blood fat disease(χ2 =11.262, P <0.001),and the history of diabetes(χ2 =5.525,P <0.050),the coronary heart disease history(χ2 =10.440, P <0.001),the gender(χ2 =5.606,P <0.050),the smoking(χ2 =4.823,P <0.050)and the systolic blood pressure value,were all associated with the new cardio cerebral vascular events.Multivariate analysis showed that,the heterogeneous plaque(β=0.371,P <0.050),the carotid artery stenosis(β=0.621,P <0.050),the history of hypertension(β=0.517,P <0.001)and smoking(β=0.264,P <0.050)were shown to be significantly associates with new onset cardiovascular events.Conclusion The characteristics of atherosclerotic plaque of carotid artery were significantly associated with the subsequent cardiovascular events among 60 -70 years old residence in Renqiu region,Hebei.Routine carotid ultrasound screening might be useful for identify those people with high risk of develo-ping cardiovascular events.

Objective The population -based study was conducted in Hebei Renqiu 60 -70 years old resi-dents to evaluate cardiovascular disease morbidity risk in next 10 years,to analyze the related risk factors and provide an objective basis for the prevention and control of cardiovascular diseases in the local areas.Methods Cluster sam-pling method was used to select elderly residents (aged from 60 to 70 years)in Renqiu city as the research subjects. A total of 5 010 cases,2 163 males,2 847 females were included in this study.Investigation contents included health questionnaire,anthropometric and laboratory detection.According to the Framingham Risk Score (FRS),10 -year risk probability of cardiovascular disease was calculated.Research subjects were divided into low risk group (<10%),medium risk group (≥10% and <20%),high -risk group (≥20%),and logistic regression was used to analyze the risk degree of the related risk factors.Results The 10 -year cardiovascular risk median value of 60 -70 years elderly residents was 8.0 (4.0 -16.0),among them male was 16.0 (12.0 -20.0),female was 4.0 (2.0 -6.0).Low risk group had 2 784 cases,accounted for 55.7%;medium risk group had 1 452 cases,accounted for 29.0%,high-risk group had 774 cases,accounted for 15.3%.The most important risk factors were smoking and cholesterol increasing,who contributes elderly residents aged 60 to 70 years in Renqiu cardiovascular 10 -year risk.The history of stroke,excessive drinking,waist circumference,diastolic blood pressure,elevated uric acid level and HOMA -IR were the independent risk factors in moderately high risk 10 -year probability of cardiovascular.Conclusion The elderly residents aged 60 to 70 years in Renqiu has higher cardiovascular risk of 10 years.Quitting smoking,limitting alcohol,controlling of blood pressure,blood lipids,uric acid,waist circumference and HOMA -IR are important to improve cardiovascular 10 -year risk.Among them,quit smoking and alcohol limit are the most effective measures.

AIM: To explore the effect of TNF-related apoptosis inducing ligand (TRAIL), a new apoptotic inducing molecule on the biological activity of hepatocarcinoma cell line. METHODS: The expression of membrane binding TRAIL on HepG2 cells was detected by immuno-cytochemistry. Quantity of secretory TRAIL was assayed by ELISA method. The cytotoxicity and apoptosis induced by TRAIL was detected by MTT and TUNEL method, respectively. The telomerase activity of HepG2 cells was detected by TRAP-PCR assay kit. The expression of hTERT, the catalytic subunit of telomerase, was detected by FCM. RESULTS: TRAIL was constitutively expressed on the membrane of HepG2 cell line. Soluble TRAIL was also expressed to a certain degree. Cytotoxicity assay showed that TRAIL significantly inhibited the growth of hepatocarcinoma cells. TUNEL assay indicated that TRAIL induced apoptosis in hepatocarcinoma cells. Detection of telomerase activity showed that TRAIL inhibited telomerase activity and the expression of telomerase catalytic subunit. CONCLUSION: TRAIL is an effective molecule to inhibit the growth of hepatocarcinoma through multiple pathways, such as inducing apoptosis and inhibiting the activity of telomerase.

Objective To investigate the potential relationship between neck circumference and obesity related indexes and metabolic disorders associated with insulin resistance.Methods A random cluster sampling method was used to identify study population among the 4 412 60 -70 years old permanent residents in Renqiu region.Face to face health questionnaire,physical examination,laboratory tests were used.According to the gender group,the correlation between neck circumference and obesity related indexes and metabolic disorders associated with insulin resistance were analyzed.Results Comparing neck circumference and waist circumference,waist height ratio, and body mass index(BMI) of man and woman respondents,the differences were statistically significant.Neck circum-ference and waist circumference,waist height ratio,and BMI had positive correlation(male:r =0.752,0.695 and 0.761.W:r =0.707,0.655,0.721,all P <0.01).Increased trends of neck circumference,waist circumference,waist height ratio and BMI coincided with increased trend of thypertension,diabetes,hyperlipidemia and hyperinsulinemia and hyperlipidemia,and no gender differences.With the increase of the neck circumference,the incidence of above mentioned diseases also increased accordingly.Conclusion Neck circumference was associated with obesity related indexes and metabolic disorders associated with insulin resistance.Neck circumference measurement can be used as an effective indicator of central obesity,and had great significance for early prediction and prevention of metabolic disorders associated with clinical insulin resistance.