The present paper analyzed actualities and shortages of traditional comfortable air-conditioning system(ACS) in utilizing fresh air, airflow organise, air purge and maintenance to assure indoor environment healthy, and presented a valid ways to improve ACS. Elaborated that in order to assure indoor environment healthy, reasonable, effective use of fresh air, airflow organise, air purge and maintenance will be the key of change from comfortable ACS to healthy comfortable ACS.

0.05).Conclusion Among the DM patients,the incidence rate of PC is obviously increasing,and with the course of DM elongating,the risk of PC is increasing.There is no obvious difference between sexes.Compared with common people,the incidence rate of PC in DM patients is higher.Type 2 diabetes mellitus might be initial symptom of PC.

Objective To investigate the effect of radiation on the mitochondrion in adenocarcinoma A549 cells.Methods After A549 cells were irradiated with 0,0.5,3 or 8 Gy of 60Co γrays,mitochondrion membrane potential of A549 cells was detected by JC-1 probe,and ATP activity was measured by ATP kit in a chemiluminescence apparatus.The mitochondria DNA copy numbers was detected by real-time PCR assay.Results At 24 h after radiation,the mitochondrion membrane potential of A549 cells in all the irradiated groups changed significantly (F =243.44,P ＜ 0.05),among which 0.5 or 3 Gy of radiation resulted in a significant increase of mitochondrion membrane potential of A549 cells (t =-10.12,-5.59,P ＜ 0.05).However,the mitochondrion membrane potential of A549 cells exposed to 8 Gy of radiation decreased significantly 24 h after radiation (t =15.22,P ＜ 0.05).The mitochondrion membrane potential of A549 cells in all radiation groups returned to the normal level 48 h after radiation (F =10.36,P ＜ 0.05).24 h after radiation,the level of ATP in A549 cells significantly changed respectively(F =97.08,P ＜ 0.05),similar to the mitochondrion membrane potential.The ATP level in 0.5 and 3 Gy groups increased significantly (t =1.66,7.27,P ＜ 0.05),and the level of ATP in 8 Gy group decreased significantly (t =-8.24,P ＜ 0.05).Furthermore,48 h after both 0.5 and 3 Gy of radiation,the ATP content in A549 cells was still higher than that in untreated A549 cells (t =4.60,8.53,P ＜0.05).The mitochondria DNA copy numbers in A549 cells increased significantly in all the radiation groups (F =118.00,P ＜ 0.05).Compared with untreated A549 cells the mitochondria DNA copy numbers in A549 cells increased at 0.5 Gy by 12 times(t =0.02,P ＜0.05),and increased at 3 and 8 Gy by 7 and 10 times,respectively (t =9.68,15.10,P ＜ 0.05).Conclusions High dose of radiation resulted in the decrease of mitochondrion membrane potential of A549 cells,which subsequently affected the production of ATP.However,radiation with moderate and lower dose could lead to the compensatory increase of mitochondrion membrane potential of A549 cells,which promoted the production of ATP.The mitochondria DNA copy numbers compensatory would increase after A549 cells were exposed to radiation within 8 Gy.

Objective To explore the expressions of Topo-Ⅱ,GST-π in gastric cancer tissues and normal gastric mucosa tissues,to reveal its relationship with clinical pathological features and significance.Methods Immunohistochemical method was used to detect Topo-Ⅱ,GST-π expressions in 100 cases of gastric carcinoma and 20 cases of normal gastric mucosa,make a comprehensive analysis combined with clinical pathology data.Results There were significant difference of expression of Topo-Ⅱ,GST-π between the normal gastric mucosa tissues and gastric cancer of different degree of differentiation.Topo-Ⅱ positive expression rate of 5.0 ％ (1/20),100 ％ (30/30),96.7 ％ (29/30) and 87.5 ％ (35/40) respectively; GST-π positive expression rate were 60.0 ％ (12/20),83.3 ％ (24/30),96.7 ％ (29/30) and 100.0 ％ (40/40) respectively (P ＜ 0.05).The expressions of Topo-Ⅱ,GST-π in gastric cancer tissue were not relevant to patient' s sex,age,tumor location,infiltration depth (P ＞ 0.05).Topo-Ⅱ associated with the differentiation degree and lymph node metastasis of tumors,with the decreasing degree of tumor differentiation,lymph node metastasis,Topo-Ⅱ expression also decreased.GST-π was associated with tumor diameter,degree of differentiation and lymph node metastasis,the lower the degree of differentiation,lymph node metastasis,tumor diameter the more,GST-π expression increased (P ＜ 0.05).GST-π and Topo-Ⅱ were negative correlation and both expressed in gastric cancer tissue (P ＜ 0.01).Conclusions The expressions of Topo-Ⅱ in gastric cancer tissue is associated with the differentiation degree and lymph node metastasis of the tumor.GST-π is associated with tumor diameter,the degree of differentiation and lymph node metastasis.GST-π and Topo-Ⅱ in gastric cancer tissues are negatively correlated.

Objective To evaluate a somatostaitn analogue (Octreotide) in the treatment of hepatocellular carcinoma (HCC). Methods In this study 62 HCC patients were divided into therapy group (30 cases) and control group (32 cases) based on patients' own will. Patients in treatment group were assigned to receive an average dosage of 339.43±165.53 mg of octreotide. Treatment results and patients' life quality were evaluated on 3rd and 6th month. Result (1) The average live time of the treatment group was (12.89±6.21) months much longer than that of the control group (5.36±6.36) months (P < 0.05). The 6 month, 12 month survival rate of treatment group (73.3% ,50.0% ) was better than that of the control group(40.6% ,9.37% ) (χ2 =4.02 ,χ2 =9.67,all P <0.05). (2) Appetite was improved in 21 patients, body weight increased in 12 patients. Debility ameliorated in 17 patients in therapy group. (3) Tumor grew larger in 8 cases in control group on the sixth month based on liver CT and 6 of them had extrahepatic metastasis. While in therapy group tumor size decreased in 6 cases; did not change in 9 cases; 3 grew larger, and 1 had extrahepatic metastasis. (4) As for side-effects of octreotide therapy, 6 patients had diarrhea at the beginning, as the treatments continued, the symptoms disappeared within one month. Conclusion Octreotide prolongs the surviving time of patients with hepatocellular carcinoma, increases the 6 and 12 months survival rate, causing mild side-effects, and improves the life quality of patients with hepatocellular carcinoma.

Objective To investigate the prevalence of Helicobacter pylori (H .pylori)infection in type 2 diabetic patients and its effects on diabetic gastroparesis.Methods Prospective clinical case-control study was applied.From January 2011 to December 2013,125 hospitalized patients with type 2 diabetes and 142 healthy controls without dyspeptic symptoms were enrolled.The prevalence of H .pylori infection and the incidence of gastroparesis in 125 patients with diabetes were investigated in both two groups.The patients with type 2 diabetes were divided into groups according to the course of the disease,and the prevalence of gastroparesis and H .pylori infection of each group were analyzed.The patients with type 2 diabetes and healthy controls confirmed with H .pylori infection were treated with eradication therapy,the rate of eradication of two groups was compared.The improved symptoms of gastroparesis before and after eradication therapy of patients with type 2 diabetes were compared.The chi-square test was performed for statistical analysis.Results The prevalence of H .pylori infection in type 2 diabetic patients was 66.4%(83/125),which was significantly higher than that of healthy control group (51 .4%,73/142 )(χ2 =5 .549,P <0.05).The prevalence of gastroparesis in diabetic patients with the disease course less than 10 years,10 to 20 years and more than 20 years was 33.8% (27/80 ),47.1 % (16/34 )and 8/11 , respectively.The difference was statistically significant (χ2 = 6.554,P < 0.05).The prevalence of H .pylori infection in patients with gastroparesis was 78.4% (40/51 ),which was significantly higher than that of patients without gastroparesis (58.1 %,43/74)(χ2 =4.716,P <0.05).The eradication rate of H .pylori infection in patients with type 2 diabetes was 68.7% (57/83),which was lower than that of healthy control group (87.8%,36/41),and the difference was statistically significant (χ2 =4.385 ,P <0.05).The incidence of epigastric pain and distension,early satiety and apocleisis before H .pylori eradication in type 2 diabetes patients was 75 .9% (63/83 ),66.3% (55/83 )and 67.5 % (56/83 ), respectively,while after eradication which was 44.6%(37/83),37.3%(31/83)and 39.8%(33/83)after eradication,respectively.The differences were statistically significant (χ2 =15 .720,12.764 and 11 .724;all P <0.01).Conclusions The prevalence of H .pylori infection is significantly higher in type 2 diabetic patients,and gastroparesis in type 2 diabetic patients may be correlated with H .pylori infection.The eradication rate in type 2 diabetic patients was lower,and H .pylori eradication therapy can efficiently improve the symptoms of dyspepsia in diabetic patients with gastroparesis.

OBJECTIVE Toillustratethepharmacokineticsandpharmacodynamicsofdifferentdos-agesofsustained-releaseimplantofgoserelininrats.METHODS Theratsreceivedasingledoseof sustaineed-release i mplant of goserelin 0.3,0.6 and 1 .2 mg per rat by subcutaneous injection,respec-tively.Concentrations of goserelin and testosterone in plas ma were determined by HPLC-MS/MS.The pharmacokineticparameterswerecalculatedbyWinNonlin6.3.RESULTS Themainpharmacokinetic parameters of the 0.3,0.6 and 1 .2 mg per rat were as fowllows:the area under the concentration-time curve(AUC0-t)was 770 ±96,1534 ±299 and (3233 ±777)μg·L-1·h,and the maximum plasma con-centration(cmax)was 3.7 ±0.3,6.8 ±2.2 and (1 7.6 ±5.4)μg·L-1 ,respectively.Regression analysis was applied to analyze the relationship between AUC0-t and cmax at different doses and those relative coefficients were 0.942 and 0.923 respectively.AUC0-t and cmax increased with the dose in the range of 0.3-1 .2 mg per rat.As for other main pharmacokinetic parameters (peak time,half life,mean resi-dence time,clearance and apparent volume of distribution),there was no significant difference between the three groups.Testosterone plasma concentration reached the highest level following administration and then kept decreasing to low concentrations.Between 28 d and 35 d,testosterone plas ma concentra-tionslowlyincreasedtothenormallevel.CONCLUSION Pharmacokineticcharacteristicsofsustained-release implant of goserelin in rats show a linear relationship,within the dose range of 0.3-1 .2 mg per rat.The results from pharmacodynamic data show that testosterone does not change in a dose-depend-ent manner at a dose ranging from 0.3 to 1 .2 mg per rat.Testosterone plasma concentration decreases to theoretical castrate level (0.5 μg·L-1 )after 4 d following a dose of 0.6-1 .2 mg per rat.

Objective To explore the changes of human mitochondrial COXI,ND1 and ND6 genes expression induced by ionizing irradiation.Methods Changes of human COXI,ND1 and ND6 gene expression were detected by RT-PCR and Real-time PCR 8 h after the irradiation in human lymphoblastoid cell lines,which were exposed to 1-10 Gy 60Co γ-rays.And the dose-effect relationships between expression changes of the genes and the doses were analyzed.The changes of these three genes expression were also analyzed at different post-radiation time-points between 0.5 h and 72 h after irradiation of 5 Gy in order to explore the time-effect.Results The expression of three genes COXI,ND1 and ND6,showed either the dose-effect or the time-effect after irradiation.The gene expression levels of three genes up-regulated generally and the peak change time-point was 4 h after irradiation.Conclusion Ionizing radiation,msht induce the changes of mitochondrial gene expression,and the gene expression level is up-regulated.

Objective To establish rat models with pulmonary artery hypertension induced by monocrotaline(MCT) and to observe the pathological changes of lung tissue.Methods Seventy male Wistar rats were randomly devided into three group:control group(n=10),50 mg?kg-1 MCT group(n=30),60 mg?kg-1 MCT group(n=30).At two weeks and four weeks after injected intraperitoneally with MCT(injected intraperitoneally with equal normal saline in control group),the right ventricular systolic pressure(RVSP)and right ventricle weight/left ventricle+septum weight [RV/(LV+S)] ratio were measured.Hematoxylin-eosin staining and orcein technique were used to observe the pathological changes of lung tissue and pulmonary arterioles'medial thickness.Results Two weeks or four weeks after MCT administration,RVSP in 50 mg?kg-1 MCT group was higher than that in control group(respectively 36.6 mmHg?5.1 mmHg,39.1 mmHg?7.0 mmHg versus 26.1 mmHg?3.8 mmHg,both P

Objective To explore if the occupational exposure to low dose thorium could induce adaptive response in peripheral lymphocytes.Methods 40 individuals.who exposed to thorium and rare earth mixed dust(exposure group) or control in Baotou Steel Plant, were selected, and chromosome aberrations were analyzed.Then the peripheral blood samples were irradiated in vitro with 2 Gy60Co γ-rays,and unstable chromosome aberration or DNA stand breakage analysis using single cell gel electrophoresis was performed. Results The dicentrics before 2 Gy exposure in exposure group was higher than that in control(P>0.05). But the dicentries after 2 Gy exposure in exposure group was lower than that in control,but not significantly (P>0.05).The tricentrics in exposure group was significantly lower than that in control(U=3.1622, 0.0ol