AIM： To investigate the effects of 6， 7－ dimethoxycoumarins on the proliferation and the cell cycle of human lung carcinoma cell（ PA） in vitro METHODS： The effects of 6， 7－ dimethoxycoumarins on the cytomorphology， growth and cell cycle of PA cells were evaluated by MTT assay and flow cytometry in vitro RESULTS： 6， 7－ dimethoxycoumarins could inhibit the proliferation of PA cells in a dose－ dependent manner The inhibition action of 6， 7－ dimethoxycoumarins plateaued at 160μ g/ml(52 4％ inhibition) The agent in dose of 80μ g/ml led to a decline in the proportion of cells to those in G2/M phase， made the cells remain in G0/G1 phase and reduced the proliferation index(PI) of PA cells CONCLUSION： In vitro， 6， 7－ dimethoxycoumarins can inhibit the proliferation of PA cells， which leads to arrest of the cells in G0/G1 phase by way of inhibiting DNA synthesis

Objective To explore the relationship among professional commitment, learning burnout and academic self-efficacy of undergraduate nursing students. Methods 506 undergraduate nursing students were investigated with the three Questionnaires of college students: professional commitment questionnaire, learning burnout inventory and academic self-efficacy scale. Results The scores of affective commitment, ideal commitment, normative commitment and continued commitment of the undergraduate nursing students were (28.229 ± 5.327), (20.348 ±4. 507), (19. 405 ± 3. 730), (18. 148 ± 2. 954) and( 86. 130 ± 13. 421), respectively. And the scores of depression, misconduct, low sense of accomplishment, total bumrnut of the undergraduate nursing students were(21.733 ±5.338), (18.459 ±3. 918) , (17.083 ±3. 596)and(57. 275 ±9. 766) , respectively. As well as the scores of learning ability of self-efficacy, learning behavior of self-efficacy and total self-efficacy were(35.765 ±5.835), (35.247 ±4.840)and (71.012 ±9.659), respectively. The affective commitment,ideal commitment and normative commitment of professional commitment were negatively correlated with the dimensions of learning bumout. And the continued commitment was significant correlated with the low sense of accomplishment. Otherwise, the dimensions of professional commitment were positive correlated with the dimensions of academic self-efficacy. However, the dimensions of academic self-efficacy were significant negative correlated with the dimensions of learning burnout (P＜ 0. 01). Conclusions The professional commitment, learning bumout of undergraduate nursing students are closely related with the academic self-efficacy of undergraduate nursing students. The higher the levels of professional commitment and academic self-efficacy are, the lower the level of learning bumout is.

Objective To evaluate the effect of live frog skin in the treatment of deep partial thickness and full thickness burn. Methods 159 burned patients were randomly divided into two groups: wounds treated with frog skin or suckling pig skin. Wounds were covered by frog skin(35 cases) or by suckling pig skin(31 cases) after surgical debridement or when the crust began to dissolve for patients with deep partial thickness burns, and by frog skin (49 cases) or by sucking pig skin(44 cases) after surgical debridment or autologous skin grafting and escharetomy for patients with full thickness burns. There was no significant difference between the two groups in mean age, burn area and burn type. Results Compared with the suckling pig skin, frog skin could remarkably decrease days of wound recovery and antibiotics administration, and reduced incidence of wound infections and rejection in patients with full thickness burns. Conclusions Frog skin possessed more powerful anti-infection ability, and rare rejection phenomenon in the treatment of burn wounds. It may be a suitable biological dressing for burn wounds.

[Objective]To assess the efficacy of one-stage anterior radical debridement,decompression,and fusion with anterior and/or posterior spinal instrumentation in the treatment of multisegments spinal tuberculosis.[Method]From 2001 and 2005,a total of 15 patients included thoracic,thoracolumbar and lumbar spinal tuberculosis underwent anterior debridement,allograft bone fusion,and stabilization with anterior and posterior instrumentation.The mini-invasive technique including thoracoscope and X-tube were applied in the later 8 cases.[Result]An average of 2.1 years' follow-up was achieved in 16 patients.The overall fusion rate was 100% in the dynamic lateral views.There was no graft problems.The kyphosis angles that were corrected postoperatively averaged 19.9?.All patients' neurological function were improved except that there was no change in 1 patient with Frankel grade B preoperatively.[Conclusion]Reconstructing the stability of spine is very important for the treatment of spinal tuberculosis.The application of internal instrument and allograft,choosing appropriate surgery can greatly improve the clinical results.Mini-invasive technique reduced blood lost and made the operation easier.

AIM:To investigate the effects of 6,7-dimethoxycoumarins on the proliferation and the cell cycle of human lung carcinoma cell(PA)in vitro METHODS:The effects of 6,7-dimethoxycoumarins on the cytomorphology,growth and cell cycle of PA cells were evaluated by MTT assay and flow cytometry in vitro RESULTS:6,7-dimethoxycoumarins could inhibit the proliferation of PA cells in a dose-dependent manner The inhibition action of 6,7-dimethoxycoumarins plateaued at 160?g/ml(52 4% inhibition) The agent in dose of 80?g/ml led to a decline in the proportion of cells to those in G2/M phase,made the cells remain in G0/G1 phase and reduced the proliferation index(PI) of PA cells CONCLUSION:In vitro,6,7-dimethoxycoumarins can inhibit the proliferation of PA cells,which leads to arrest of the cells in G0/G1 phase by way of inhibiting DNA synthesis

Objective To explore the independent risk factors and distribution of intracranial arterial stenosis in young pa‐tients with acute lacunar infarction .Methods We retrospectively reviewed the clinical data of 30-45 year‐old young patients with lacunar infarction who were admitted to the Third Affiliated Hospital of Xinxiang Medical University .The patients were divided in‐to two groups according to their skull blood vessel examination :intracranial arterial stenosis group and intracranial arterial stenosis group .Results There were 28 cases of intracranial large artery stenosis and 17 cases without stenosis in 45 young patients ,it was found that the levels of triglyceride ,low density lipoprotein cholesterol and carotid artery plaque in the intracranial arterial stenosis were significantly less than those of the intracranial artery stenosis (P<0 .05) .In the intracranial artery stenosis group ,15 cases were single vessel stenosis ,13 cases were multiple stenosis ,the difference was not statistically significance (P>0 .05) .Simple ante‐rior circulation stenosis in 12 cases ,simple posterior circulation stenosis in 8 cases ,only the anterior and posterior circulation in‐tracranial artery stenosis ,vascular risk factors were not statistically significant ( P> 0 .05 ) .Binary Logistic regression analysis showed that LDL cholesterol was an independent risk factor of intracranial arterial stenosis .Conclusion With intracranial artery stenosis in young patients with lacunar cerebral infarction prone to progressive stroke ,young patients with cerebrovascular infarc‐tion should be examined .

Mature animal models of rabbit ear scars were made from formation to maturation. Tissue oxygen partial pressure was determined by percutaneous oxygen monitoring at 14,30,60 and 90 days,and then pathology examination was performed. Fourteen days after surgery,bright red granulation tissues had a large number of inflammatory cells and angiogenesis; oxygen partial pressure was (0.81?0.25) kPa. Thirty days after surgery,the scars were significantly higher than the normal skin,bright red,made up of a large number of fibroblasts and capillary in the organizations; the partial pressure of oxygen was (1.98? 0.26) kPa. At 60 days after surgery,the scars were shrinking; color was light; the organization fibroblast cells and microvessel decreased; partial pressure oxygen was (1.86?0.60) kPa. Ninety days after surgery,the scars were flat; color was white; organizational structure was closed to normal skin; oxygen partial pressure was (13.70?1.16) kPa (P

Objective To explore the effect and mechanisms of intense pulsed light (IPL) in treating hypertrophic scars on rabbit ear.Methods Thirty New Zealand white rabbits were incruited in this study.Two hypertrophic scar models were made in the ventral surface of the rabbit ears with two lesions on each ear.The rabbits were divided randomly into two groups:the treatment group and the control group.Rabbits in the treatment groups were treated by IPL at the 3rd,5th,7th week after operation.Rabbits in the control groups were untreated.Morphological appearances of the hypertrophic scar were observed,and biopsies of scar were taken for HE stain and immunohistochemistry for the expression of vascular endothelial growth factor (VEGF),proliferating cell nuclear antigen (PCNA) and α-SMA,microvessel density was calculated by the expression of α-SMA at the 3rd,5th,7th,9th week after operation.At the 9th week after the operation,the ventral surface skin from two normally-fed rabbits were collected to undergo the same examination above.Results Comparing with the control group,the height of scars was reduced significantly in the IPL treatment group.The scars becaming soften and completely flat needed less time in the IPL treatment group.Comparing with the control group,the level of α-SMA,MVD,VEGF and PCNA expression in the treatment group obviously decreased over the same period (P＜0.05).Conclusions IPL is of great therapeutic effect on treating hypertrophic scar of rabbit ear.

A method for the determination of 9 phenoxy acid herbicides in soil by solid phase extraction and LC/MS/MS with matrix correction was developed. The sample was treated by ultrasonic extraction twice with 1. 5% formic acid in acetonitrile. The extract was cleaned up with NH2 solid phase extraction column. A C18 column with formic acid in pure water/methanol mixture as the mobile phase was used under gradient elution. Mass spectral acquisition was done in negative ion mode by multiple reactions monitoring ( MRM ) . Two transitions per compound were used to provide qualitative and quantitative analysis. There were good linear relationships in the range of 2-250 μg/L for 9 phenoxy acid herbicides. The correlation coefficients were in the range of 0 . 9927-0 . 9972 . The method detection limits were in the range of 1 . 66-3 . 82 μg/kg . The average recoveries at three spiked levels ( 10 , 40 , 200 μg/kg ) ranged from 85 . 3% to 110 . 0% with the relative standard deviations (RSD) of 3. 2%-12%.

Objective To investigate the effects of intervention of information literacy education on the feeling of uncertainty of patients with percutaneous coronary intervention.Methods A total of 228 cases of patients with percutaneous coronary intervention who were hospitalized during July 2010 to June 2012 were selected.The patients were divided into two groups by means of random numbers table:the experimental group (including 119 cases) and the control group (including 109 cases).The patients of the control group received traditional nursing intervention,while the patients of the experimental group received additional information literacy education intervention besides the traditional nursing.The change of feeling of uncertainty and state anxiety level of patients under two kinds of nursing interventions was analyzed and compared.Results The patients of the experimental group had high uncertainty level on the day of admission,(99.17-4.46) points.It was obviously higher than the total score (80) by 50％.Compared with that on the day of admission,the uncertainty level on the night before surgery and on the day of patient discharge significantly declined.The state anxiety level of the patients of the experimental group was (52.97±5.91) points,higher than the normative level of Chinese normal people.Compared with that on the day of admission,the state anxiety level on the night before surgery and on the day of patient discharge significantly declined,and it was lower than the normative level.Compared with those of the control group,the MUIS and SAI assessment of the experimental group on the night before surgery and the day of patient discharge obviously declined.Conclusions The information literacy education intervention was able to reduce the uncertainty level and state anxiety level of patients with percutaneous coronary intervention.Therefore,the nursing quality of patients was enhanced.