添加化肥和覆膜提高土温对土壤中香蕉穿孔线虫的灭除效果

【目的】研究化肥和阳光照射作用对土壤中香蕉穿孔线虫的灭除效果。【方法】利用在感染香蕉穿孔线虫的病土中添加化肥并覆盖塑料薄膜的方法。【结果】采用添加石灰氮或尿素并覆盖白膜或黑膜的处理方法均促使了土壤温度升高;在当地晴日平均气温最高值达到38.8℃以上,并保证晴日数在31 d以上,采用添加石灰氮或尿素并覆膜处理5周以上的时间,可有效灭除土壤中香蕉穿孔线虫;在当地晴日平均气温最高值达到37.6℃以上,并保证晴日数在38 d以上,采用添加石灰氮或尿素并覆膜处理6周以上的时间,同样可灭除土壤中香蕉穿孔线虫;在各处理方法中,1 L土壤加石灰氮10 g并覆盖白色薄膜处理的土壤温度提升效果最好。【结论】在高温季节,在土壤中添加石灰氮或尿素并覆盖塑料薄膜的方法均能灭除病土中的香蕉穿孔线虫。

Surface Modification of Cu-Cr Complex by NIR and MIR Laser

Irradiated by infrared laser, the surface reducibility and adsorbability of Cu-Cr complex could be improved, owing to the interaction of photo-fragmentation and laser texturing. Analyzed by the binding energy spectra and the auger spectra, the valence states of chromium ion and copper ion were+3 and+1 after radiation respectively, which still had the reducibility to release electrons. In contrast with the near-infrared(NIR)1 064 nm and mid-infrared(MIR) 10 600 nm laser at the same average output power of 15 W, the reduced metal percentage in the Cu-Cr complex was obviously distinguished at the depth from nanometer to micron. After chemical plating, the average coating thickness and mean-square deviation of the NIR sample were 11.61 μm and 0.30 for copper layer, and 2.69 μm and 0.08 for nickel layer. The results were much better than those of the MIR sample.

The influence of ultraviolet blood irradiation and oxygenation on oxygen free radicals metabolism in rabbits with soman intoxication

Objective: To investigate the effect of ultraviolet blood irradiation and oxygenation (UBIO) on the metabolism of oxygen free radicals in rabbits with acute soman intoxication. Methods: One hundred rabbits were randomly divided into 5 groups: normal control group, intoxication group, routine therapy group. UBIO therapy group and combined therapy group. After 14 d, the concentration of malondiadehyde(MDA) and activity of superoxide dismutase(SOD), glutathionperoxidase(GSH-Px), catalase (CAT) and total antioxidative capacity (T-AOC) in serum were determined respectively. Results: Compared with the normal control group, the concentration of MDA and activity of CAT in the intoxication group were significantly higher (P < 0. 05). but SOD. GSH-Px activity and T-AOC were significantly lower (P<0. 05). After UBIO or combined therapy, serum MDA level was significantly lower in comparison with intoxication group (P<0. 05). but the activity of SOD. GSH-Px, CAT and T-AOC were higher than intoxication group(P<0. 05). Conclusion: There is an obvious oxygen free radical injury in rabbits with a-cute soman intoxication. UBIO can improve the antioxidation ability of rabbits and may be applied to treat acute soman intoxication as adjunctive therapy.

Role of intravenously administered hyoscine butyl bromide in retrograde terminal ileoscopy: A randomized, double-blinded, placebo-controlled trial

AIM： To evaluated the role of hyoscine butyl bromide in facilitating retrograde ileoscopy. METHODS： Retrograde terminal ileoscopy was attempted in 200 consecutive patients undergoing colonoscopy. After intubation of the cecum and visualization of the ileocecal valve, butyl bromide injection or normal saline was given intravenously to the patients in a double blind random fashion. The pulse rate and oxygen saturation were measured continuously. After completion of the procedure, endoscopists were then asked to score the ease of intubation and the ease of visualization of the terminal ileum on a visual scale of 1 to 10. The patients were also asked to score the pain after receiving hyoscine butyl bromide injection on a score of 1 to 10. RESULTS： Terminal ileoscopy could be performed in 188 patients. The mean （SD） visual analogue score for the ease of intubation of the cecum was 7.4 （0.65） in the injection group and 5.9 （0.8） in the placebo group （P 〈 0.001）. The mean （SD） length of ileum visualized in the injection group was 14.4 （3.3） cm and 10.4 （2.7） cm in the placebo group （P 〈 0.001）. The mean （SD） visual analogue score for ease of visualization of the terminal ileum was 7.5 （0.69） in the injection group and 5.9 （0.7） in the placebo group （P 〈 0.001）. The pain score experienced by the patients was 6.5 （0.7） in the injection group and 6.7 （0.69） in the placebo group （P 〈 0.008）. Although the pulse rate increased significantly in patients receiving the drug, no statistically significant difference was noted in the oxygen saturation between the two groups either before or after administration of the drug. No complications were observed in either of the groups. CONCLUSION： Hyoscine butyl bromide injection is a useful adjunct in helping the intubation and visualization of terminal ileum during colonoscopy.

Synthesis of 3-Alkyl-5-Benzylidene-2,4-Thiazolidinedione Under Microwave Irradiation

Microwave irradiation of aromatic aldehyde and 2,4-thiazolidinedione provides a fast and high-yield access to 5-benzylidene-2,4-thiazolidinedione. Seven 3-alkyl-5-benzylidene-2,4-thiazolidinedione compounds were produced with high yield by reacting 5-benzylidene-2,4-thiazolidinedione with different alkylating agents under microwave irradiation.

Role of VEGF-A/C and CCR-7 in the enhanced metastasis of A549 cells induced by 2 and 4 Gy X-rays in vitro and in vivo

Radiotherapy is a common strategy in treating lung cancer.Accumulating evidence suggested that radiotherapy has the potential to promote the metastasis and invasion of carcinoma cells.In this study,we aimed to testify the role of vascular endothelial growth factor(VEGF)and C-C chemokine receptor-7(CCR-7)in the metastasis of human adenocarcinoma A549 cells in vivo and in vitro.Nude mice were injected with A549 cells irradiated by 0,2 and 4 Gy X-rays,respectively.Quantitative detections of VEGF-A/C and CCR-7 mRNA from lung sample were performed by real-time RT-PCR.Small interfering RNA(siRNA)transfection technology was further used to testify the role of the genes in the metastasis of A549 cells.VEGF and CCR-7mRNA could only be detected 10 weeks post injection in vivo when visible tumor foci scattered in lung.In addition,VEGF-A/C mRNA expressed significantly higher in mice injected with A549 cells irradiated by 2 and 4 X-rays than those with 0 Gy X-rays irradiation.On the other hand,A549 cells with or without X-rays irradiation transfected with VEGF siRAN and CCR-7 siRNA showed a dramatic decrease of invasiveness compared to normal A549 cells with or without irradiation.The migration indexes were?0.7,?0.48,?0.34 and?0.32 for A549 cells with CCR-7 siRNA,VEGF siRNA,X-rays combined CCR-7 siRNA and X-rays combined VEGF-siRNA respectively.These results demonstrated that X-rays could promote the metastasis of A549 cells,and VEGF-A/C and CCR-7 mRNA were closely related to the metastasis of A549 cells in vivo and in vitro.