ObjectiveTo assess the value of simulation craniotomy (SC) technique in evaluation of superficial cerebral veins(SCVs)and its relationship with convexity,parasagittal and falcine meningiomas.MethodsForty-nineconsecutivepatientswithconvexity,parasagittal,andfalcine meningiomas performed SC technique and three-dimensional contrast enhanced MR venography (3D CE MRV) in a prospective study.The number of SCVs ( diameter ＞ 1 mm) within 2 cm around the margin of tumors detected by two techniques were compared with the paired t test.Furthermore,49 cases were divided into groups according to the tumor largest diameter,position,and dural enhancement.The image quality of SC technique in different groups were analyzed by Wilcoxon test in order to find influence factors.Results The number of SCVs within 2 cm around the margin of tumor in SC was 4.4 ± 1.9,which was significantly less than that on 3D CE MRV (5.1 ± 2.7) ( t =3.131,P ＜ 0.05 ).The relationship between meningiomas and the SCVs was demonstrated well on SC in majority of cases with the score of image quality was 2.5 ±0.7.The score of image quality of 12 patients with obvious dural enhancement was 1.5 ± 0.5,which was significantly lower than that of 37 patients without dural enhancement ( 2.8 ± 0.3 )( Z =- 3.093,P ＜ 0.05 ).The score of image quality of 18 patients with tumor larger than 4 cm in diameter ( 2.2 ± 0.9 )was significantly lowed than that of 31 patients with small tumors (2.7 ± 0.5 ) ( Z =- 2.057,P ＜ 0.05 ).The score of image quality of convexity group ( n =10) and parasagittal and falcine group ( n =39 ) was 2.2 ± 0.9 and 2.6 ± 0.6,and there was no significant difference between different location group ( Z =- 0.604,P ＞ 0.05).ConclusionsSimulation craniotomy can exactly display SCVs avoiding the influence of deep cerebral veins and skull veins.This simple technique can provide useful information about the SCVs and their relationships with cortical structures and tumors for preoperative surgical planning.

Based on the development requirements of medical model, This paper introduces the capacity, features and application to portable medical instrument of USB (universal serial bus). The developing trend of USB is also discussed.

Objective To study the protective mechanism of S-adenosylmethionine ( SAM) underlying liver injury induced by lipopolysaccharides ( LPS). Methods One hundred BABL/c mice were randomly divided into LPS group and SAM group. Mice in LPS group were intraperitoneally injected with 10 mg/kg LPS,and the mice in SAM group were injected with 100 mg/kg SAM 2 h before receiving the same dose of LPS. The survival rate of mice in 2 groups was recorded in 24,48,72 and 120 h after LPS injection. Histopathological changes in liver of mice were examined in 0,1,3,6,12 and 24 h after LPS injection. Tumor necrosis factor-? ( TNF-?) and interleukin-10 ( IL-10) levels in serum were measured by ELISA analysis at above time points. Expression of Toll-like receptor 4 ( TLR4) and liver X receptor ? ( LXR?) in hepatic tissues was detected by immunohistochemistry and Western blotting. Results SAM increased the survival rate of mice from 50. 0% ,40. 0% ,30. 0% ,and 30. 0% before LPS injection to 80. 0% ,70. 0% ,60. 0% ,and 50. 0% after its injection ( P

S-adenosylmethionine(SAM) is a physiologically active molecule in all the organizations and the human body fluids, and it is important to participate in a variety of biochemical reactions, the regulation of liver regeneration, liver cells differentiation and various sensitivity of the injury. The SAM affects the liver through a variety of ways. It is confirmed that the SAM and MTA can block the LPS-induced TNF-α of Kupffer cells to protect the liver. In a word, S-adenosylmethionine may be beneficial to LPS-induced liver in-jury in clinical treatment.

Objective To identify the frontiers and hotspots in studies on lung cancer therapy by text mining. Methods PubMed-covered papers on lung cancer therapy were retrieved from 2013 to 2014 . The terms with a broa-der meaning were excluded by mapping the UMLS concept with MetaMap and by limiting their semantic types. A LDA model was established to identify the topics. Results The LDA model could identify the frontiers and hotspots in studies on lung cancer therapy from 2013 to 2014 . Conclusion Frontiers and hotspots in studies on lung cancer therapy can be identified by analyzing the topics and reading the related literature, which can thus provide reference for related medical researchers and managers.

〔Abstract〕 The paper summarizes identification methods for research fronts , including the method based on bibliometrics and the au-tomatic and semi-automatic methods based on computers .Their respective advantages and disadvantages are noted and it is suggested that such tools as semantic network should be utilized to identify research fronts in a deeper and more accurate manner .

SO2 is one of the main pollutants in the air. Tradational disposal methods are limited in the industrial application owing to their high cost. Some foreign scholars began to research in microbial treatment of SO2 both in laboratory test and in full-scale test in recent years and good results were achieved. This method can significantly lowering costs and acquire sulfur product and microbial biomass protein of high quality. The microbial method which is simple, effect and of low costs can satisfy needs of industry and give attention to environmental, economical and social benefits, therefore, it will have amplitude and well application prospects.

A co-word matrix was constructed with PubMed-covered papers on breast cancer-related enzyme from 2009 to 2011 and from 2012 to 2014 as its data source.The papers were double clustered by gCULTO to generate class groups and identify the breast cancer-related enzyme research frontiers and the evolution of different class groups.

To obtain an ideal recombinant C-terminal fragment of the merozoite surface protein of Plasmodium falciparum in the Pichia pastoris expression system, the major surface protein-119 (MSP-119) gene sequence bearing the 6-his gene was inserted into expression vector pPIC9k and the target gene was transformed to the susceptible yeast cells GS115 by using electroporation. The multiple inserts were screened and the successfully expressed MSP-119 protein with the relative molecular weight of 12kDa in the supernatants of cell cultures could be detected by SDS-PAGE. Meanwhile, Western blot analysis also demonstrated that this protein reacted with mouse anti-MSP-119 monoclonal antibody, and the expression level of MSP-119 was more than 1.0 g/L. It is concluded that this recombinant protein expressed in the Pichia pastoris expression system resembles the native proteins existed.

The paper gives a comparative analysis of retrieval function among PubMed, Google Scholar and Scims mainly form the following aspects: retrieval methods, retrieval results and output formats. Effects of retrieval are compared through 10 retrieval tests, and respective characteristics of three retrieval tools are analyzed. Google Scholar has the largest scope;PubMed has better retrieval function than the other two;in the aspect of result output, three retrieval tools have their own characteristics.