Objective: To build the relationship model of job burnout, insecurity psychology, and insecurity behavior for miners. Methods: The valid random samples included 1229 miners from national and private coal mines, who were investigated with the revised Job-Burnout Inventory for Miners, Insecurity Psychology Inventory, and Insecurity Behavior Inventory. The data was analyzed through SPSS15.0 and AMOS7.0. Results: The three dimensions of job burnout had significant direct effect on insecurity behavior [β =0.008, 0.047, 0.019) .The three dimensions of job burnout had significant direct effect on psychological paralysis (β =0.031, 0.203, 0.374) and helplessness on security (β =0.206, 0.374, 0.472) . Emotional exhaustion and disengagement from work had significant effect on temporary psychology (β =0. 192, 0.411) and antagonistic psychology (β =0.079, 0.596) . Four dimensions of insecurity psychology had significant effect on insecurity behavior (β = 0.092, 0.023, 0.093, 0.097) and it was a mediator in the model. Conclusion: Miners'job burnout have significant direct effects on insecurity behavior, but also have indirect effects through the insecurity psychology mediator.

Objective To investigate the clinical characteristics and management of congenital hypertrophic pyloric stenosis (CHPS) associated with intestinal malrotation (IM) in infants.Methods The clinical data of 6 cases with CHPS and IM admitted in our hospital from Jan 2003 to Dec 2009 were reviewed,including clinical presentation,symptoms and information of imageology.Results Through barium meal examination and sonography,4 cases were diagnosed CHPS and IM,pyloromyotomy and Ladd's procedure were performed;two cases were diagnosed CHPS,only pyloromyotomy was done,secondary operation was performed for recrudescence of vomiting.All the cases were followed up for 1 to 3 years with good prognosis.Conclusion The etiology of CHPS with IM isn't clear.The diagnosis of IM may be delayed because the symptoms of IM can be masked by that of CHPS.It is helpful for diagnosis of this disease to have barium meal and sonography examination.Good prognosis will be achieved if prompt preoperative diagnosis and operation can be done.

Objective To investigate the effect and significance of salidroside on Eag1 expression in mouse cervical cancer xenograft.Methods The mouse subcutaneous xenograft model of cervical cancer U14 cells was established.Forty female Kunming mice were divided into 4 groups according to the random principle,the xenograft group,cisplatinum group,salidroside group and cisplatinum combined salidroside group.Then the mass size was measured by using the vemier caliper everyday.The xenograft tumor weight was measured by using the electronic scale and the tumor inhibiting rate was calculated.The immunohistochemistry method was adopted to verify that the xenograft tumor was undifferentiated squamous cell carcinoma.The tumor surrounding tissue in the xenograft group was taken as the control group.RT-PCR and Western blot were adopted to detect the expression levels of Eag1 mRNA and protein in mouse cervical cancer xenografts in each group.Results Kunming mice renograft tumor model was established by subcutaneous injection of cervical cancer U14 cells,the tumor formation rate was 100％.The tumor volume and tumor weight in the cisplatinum group,salidroside group and combined group were lower than those in the senograft group,the xenograft tumor volume and tumor weight in the combined xenograft group were significantly lower than those in the cisplatinum group and salidroside group (P＜0.05);the expressions of Eag1 mRNA and protein in the xenograft group,cisplatinum group and combined group were significantly higher than those in the control group,while which in the cisplatinum group,salidroside group and cisplatinum combined salidroside group were significantly lower than those in the xenograft group,the Eag1 expression level in the combined group was lower than that in the cisplatinum group and salidroside group,the difference was statistically significant(P＜ 0.05).Conclusion Salidroside can inhibit the growth of cervical cancer xenograft and Eag1 expression,and the effect in the combined use with cisplatinum is more significant.

Aim To investigate the phytoestrogenic effects and mechanism on ER?,ER? expression levels at the protein of quercetin and psoralen in T47D cells.Methods T47D cells were treated with 10 ?mol?L-1 quercetin and 10 ?mol?L-1 psoralen for 48h respectively,total cell extracts examined for the levels of ER? and ER? protein by RT-PCR and Western blot analysis.The estrogen-like effect of quercetin and psoralen and their relations with the estrogen-receptor were evaluated by pure estrogen receptor antagonist ICI182,780 as a tool.Results Psoralen(10 ?mol?L-1) and quercetin(10 ?mol?L-1) up-regulated the expression of ER? mRNA and protein,without any effect on ER? mRNA and protein levels.The above up-regulation on ER? protein could be inhibited by adding estrogen receptor antagonism ICI182,780.Conclusion Psoralen and quercetin exerts estrogenic activity to ER-positive cells proliferation through interaction with ER? expression.

Aim To investigate the effects of quercetin and psoralen on the proliferation of human breast carcinoma cells in vitro.Methods Effects of quercetin and psoralen on the cell proliferation was tested in ER-positive MCF-7 cells by flow cytometer and Western blot.And the estrogen-like effect of psoralen and its relation with the estrogen-receptor were evaluated by pure estrogen receptor antagonist ICI182,780 as a tool.Results ① Psoralen(10 ?mol?L-1) and quercetin(10 ?mol?L-1) stimulated proliferation of MCF-7 cells compared with vehicle control,and the cell cycle was impulsed from G1 to S,DNA synthesizing was enhanced.It was also found the above function on boosting MCF-7 cell proliferation could be inhibited by adding estrogen receptor antagonism ICI182,780.② Psoralen(10 ?mol?L-1) and quercetin(10 ?mol?L-1) up-regulated ER? protein levels without altering ER? levels.The above up-regulation on ER? protein could be inhibited by adding estrogen receptor antagonism ICI182,780.Conclusions Psoralen and quercetin have the estrogen-like activities through the estrogen response pathway.And they exert estrogenic activity to MCF-7 cell proliferation through interaction with ER? expression.

Bletilla striata has been used as traditional Chinese medicine for several centuries. In recent years, the quality and quantity of wild B. striata plants have declined sharply due to habitat deterioration and human over-exploitation. Therefore, it is of great urgency to evaluate and protect B. striata wild plant resource. In this study, sequence-related amplified polymorphism (SRAP) markers were applied to assess the level and pattern of genetic diversity in twelve populations of B. striata. The results showed a high level of genetic diversity (PPB = 90.48%, H = 0.349 4, I = 0.509 6) and moderate genetic differentiation among populations (G(st) = 0.260 9). Based on the unweighted pair-group method with arithmetic average (UPGMA), twelve populations gathered in three clusters. The cluster 1 included four populations. There are Nanjing, Zhenjiang, Xuancheng and Hangzhou. The seven populations which come from Hubei Province, Hunan Province, Jiangxi Province and Guizhou Province belonged to the cluster 2. The cluster 3 only contained Wenshan population. Moreover, Mantel test revealed significant positive correlation between genetic distances and geographic distances (r = 0.632 9; P < 0.000 1). According to the results, we proposed a series of conservation consideration for B. striata.

In this study, 17 kinds of Dendrobium species of Fengdous including 39 individuals were collected from 4 provinces. Mitochondrial gene sequences co I, nad 5, nad 1-intron 2 and chloroplast gene sequences rbcL, matK amd psbA-trnH were amplified from these materials, as well as nrDNA ITS. Furthermore, suitable sequences for identification of Dendrobium species of Fengdous were screened by K-2-P and P-distance. The results showed that during the mentioned 7 sequences, nrDNA ITS, nad 1-intron 2 and psbA-trnH which had a high degree of variability could be used to identify Dendrobium species of Fengdous. However, single fragment could not be used to distinguish D. moniliforme and D. huoshanense. Moreover, compared to other combined fragments, new type combined fragments nrDNA ITS+nad 1-intron 2 was more effective in identifying the original plants of Dendrobium species and could be used to identify D. huoshanense and D. moniliforme. Besides, according to the UPGMA tree constructed with nrDNA ITS+nad 1-intron 2, 3 inspected Dendrobium plants were identified as D. huoshanense, D. moniliforme and D. officinale, respectively. This study identified Dendrobium species of Fengdous by combined fragments nrDNA ITS+nad 1-intron 2 for the first time, which provided a more effective basis for identification of Dendrobium species. And this study will be helpful for regulating the market of Fengdous.

Objective To provide data for reference on the impact of cyclosporin A (CsA) on the proliferation of the bone marrow mesenchymal stem cells in MDS patients through the investigation of the impact of cyclosporin A on human bone marrow mesenchymal stem cell proliferation. Methods The absorption rates of the bone marrow mesenchymal stem cells in the control group and the MDS patient group were determined by using the tetrazolinm salt (MTT) micro-colorimetric enzyme reaction. The concentrations of cyclosporine A are 2.5×10~4 ng/μl, 2.5×10~3 ng/μl, 2.5×10~2 ng/μl and 2.5×10ng/μl respectively. Results There is no significant difference between the each result by using different concentrations of CsA., which indicates the impact of CsA on the growth of mesenchymal stem cells is not significant(P >0.05). In the serial of concentrations mentioned, no cytotoxicity of CsA is observed. However, there is difference between the selected indicators of the control group and the patient group (P <0.01), and the value of the MDS patient group is higher than that of the control group. There is no statistic difference between the concentration of CsA and the data obtained from interactions between different groups (P >0.05). There is no significant difference between the absorption rates of the group treated by CsA of every concentration and the corresponding control group. Conclusion The impact of CsA on the bone marrow mesenchymal stem cell proliferation is significant in neither healthy people nor MDS patients.

Objective:To analyze the situation of free cervical cancer screening from 2018 to 2020 in Lucheng District of Changzhi City, Shanxi Province.Methods:The cervical liquid-based thin-layer cytology (TCT) results of 13 043 women who underwent free cervical cancer screening at the Lucheng District Maternal and Child Health Family Planning Service Center of Changzhi City in Shanxi Province from 2018 to 2020 were retrospectively analyzed. The women with positive TCT results underwent colposcopy and biopsy.Results:Among 13 043 women, 800 women were positive for TCT, with a positive rate of 61.3/100 000. The positive rates of cervical cancer screening TCT in 2018, 2019 and 2020 were 4.82% (145/3 006), 5.63% (170/3 017) and 6.91% (485/7 020), which showed an upward trend year by year (contingency coefficient = 0.037). In 2018, 2019 and 2020, the positive rates of TCT among women aged 35-44 years old were 2.95% (31/1 052), 3.78% (42/1 112) and 4.22% (82/1 969), among women aged 45-54 years old were 5.48% (68/1 241), 6.50% (90/1 385) and 7.72% (2 258/3 341), and among women aged 55-64 years old were 6.45% (46/713), 7.31% (38/520) and 8.42% (144/1 710); the positive rates of cervical cancer screening TCT among different age groups in the same year, same age group in different years and overall different age groups in 3 years were statistically significant (all P < 0.05), and the positive rates of cervical cancer screening TCT in women aged 45-54 and 55-64 years old were higher than those in women aged 35-44 years old (all P < 0.05). Among 800 cases of positive cervical cancer screening TCT, 615 cases (76.9%) were diagnosed with cervical intraepithelial neoplasia (CIN), and the incidence rate of CIN was 4.72% (615/13 043); there was statistical differences in the incidence of CIN among different years ( P < 0.05). Conclusions:The positive rates of cervical cancer screening increase year by year from 2018 to 2020 in Lucheng District of Changzhi City, Shanxi Province. Early cervical cancer screening can detect cervical lesions in time.

OBJECTIVE To identify and evaluate the risk factors in the operation process of the vaccine supply chain ，clarify the importance of each process risk in the overall risk of the vaccine supply chain ，and provide reference for stakeholders in the vaccine supply chain to formulate risk management and control strategies. METHODS In the supply chain operation reference model，the risk factors existing in the operation of vaccine supply chain were identified ，and the vaccine supply chain risk evaluation index system was constructed. The best-worst method and entropy weight method were used to determine the subjective and objective weight of the index ，and the Lagrange multiplier method was used to solve the optimal combination weight value of the index. RESULTS & CONCLUSIONS A vaccine supply chain risk evaluation index system with 18 indexes was established. Only 67％ of the indexes reflected 85％ of the vaccine supply chain risk information. The construction of the system was reasonable. The results showed that the risk weight of production process was 0.607，which accounts for the highest weight in the overall risk of vaccine supply chain ，followed by procurement （0.234），distribution（0.102），planning（0.053）and return （0.004） process risk . When managing and controlling risks ，enterprises should attach great importance to the risk factors in vaccine production；at the same time ，enterprises should also focus on other risks such as unqualified materials for products ，mixed use of materials and so on.