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BACKGROUND Inorganic arsenic (iAs) is a well-known human carcinogen recognized by the World Health Organization and the International Agency for Research on Cancer. Currently, most iAs studies in populations are concerned with drinking water and occupational arsenicosis. In Guizhou province, arsenicosis caused by the burning of coal in unventilated indoor(More)
This clinical study was designed to evaluate the efficacy and safety of this therapy in the treatment of respiratory and urinary infections caused by ceftriaxone-resistant bacteria in comparison with the effect of cefoperazone/sulbactam on cefoperazone-resistant bacteria. A total of 285 patients aged from 18 to 65 years old, with a respiratory or urinary(More)
People can obtain information from heterogeneous data resources by semantic querying based on ontology. The difficult problem is how to reformulate a global query into multiple sub-queries over those local data bases. This paper presents a kind of uniform expression for queries of concept instances and a method in dividing the query expression into the(More)
The presence of neutralising antibodies (NAbs) against adenovirus in the population is a major hurdle preventing the effective use of replication-defective adenoviruses (Ads) as candidates for gene therapy and vaccine vectors for many diseases. Only a few studies have described the epidemiology of pre-existing immunity to chimpanzee Ads in China. To assess(More)
A collaborative filtering algorithm is designed and improved in this paper, which can optimize and improve the sparsity and extention of data in systems. We can Use the user's implicit information in the web log to cluster analysis on user set and by using the dual K-means algorithm, and we can use the K-means algorithm in each clustering set to further(More)
BACKGROUND Calycosin-7-O-β-D-glucopyranoside (CG) is a natural isoflavone found in traditional Chinese medicines Astragali Radix (AR). OBJECTIVE Calycosin-7-O-β-D-glucopyranoside, an isoflavone isolated from AR, has been found to have potent antioxidantive effects. This study was designed to investigate whether CG prevents oxidative stress induced by(More)