Objective To compare the clinical effect of VATS and thoracotomy pulmonary wedge resection in treatment of pulmonary inflammatory pseudotumor. Methods 46 patients with pulmonary inflammatory pseudotumor were randomly divided into the observation group(24 cases) and the control group(22 cases) ,the control group were treated by thoracotomy pulmonary wedge resection and the observation group were treated by VATS wedge resection,the intraoperative blood loss,hospital stay, prognosis and complications were compared. Results All patients of two groups were cured and discharged. The intraoperative blood loss of observation group[(46. 0±12. 3 ) ml] was significantly less than the control group [(95.2 ± 18. 6) ml] ( t = 3. 19, P ＜ 0. 05 ), and the hospital stay was significantly shorter than the control group( t = 3.01,P ＜ 0. 05 ), the difference of the incidence of complications of two groups was not statistically significant( P ＞ 0. 05 ). Conclusion VATS wedge resection of pulmonary inflammatory pseudotumor had features of less bleeding and quicker healing characteristics,could be worthy of clinical application.

Objective To evaluate the molluscicidal effect of black plastic mulching in mountainous areas of Yunnan Prov-ince. Methods In Leqiu Village,Nanjian County,Yunnan Province,the terraced fields with Oncomelania hupensis snails were divided into A,B,C,D,E groups,and of which,A,B,C,D groups,as the experimental groups,were administered with sim-ple black plastic mulching for 30 days,60 days,90 days and 120 days respectively;Group E,as the control group,was adminis-tered with 50%niclosamide ethanolamine salt wettable powder spraying. Results In Group C and D(simple black film mulching for 90 days and 120 days),no snails were found after the administration,the average density of living snails decreased by 100%, and the cost of one year was similar to that of the control group. Conclusion The molluscicidal effect of black plastic mulching is good in mountainous areas.

A new approach based on online coupled liquid chromatography-gas chromatography-mass spectrometry ( LC-GC / MS ) was developed for the rapid determination of 4-( methylnitrosamino )-1-( 3-pyridyl)-1-butanone (NNK) in mainstream cigarette smoke, in which a switching valve was employed to online switching between two-dimensional chromatography. The online LC-GC / MS system used in this study was built by using online gel permeation chromatography-gas chromatography-mass spectrometry except that the micro gel column was replaced by micro alkaline alumina column which was prepared by ourselves before. The NNK in mainstream cigarette smoke was collected by a Cambridge filter pad, then the pad was extracted with dichloromethane, and the extract was quantitatively analyzed by online LC-GC / MS with D4-NNK as an internal standard. Online LC-GC / MS allowed online pretreatment purification, and the sample was subjected to online LC-GC / MS without any prior purification, which reduced human error in analysis process. The injection volume of the present online LC-GC / MS could reach 40 μL, which was 20 times of that of the conventional GC / MS (2. 0 μL of injection volume), and thus significantly improved the sensitivity. Under the optimum conditions, good linearity ( r = 0. 9998) was obtained over the range of 1. 2 - 120 ng / mL. The recoveries at three spiked levels ranged from 93. 9% to 96. 0% , and the limits of detection for qualitative and quantitative detection were 0. 25 ng / mL and 0. 9 ng / mL, respectively. All the results obtained by the present method are comparable to those of standard method recommend by China National Tobacco Company.