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The aim of this study is to understand the prevalence and molecular characterization of 16S rRNA methylase gene, rmtB, among Escherichia coli strains isolated from bovine mastitis in China. A total of 245 E. coli isolates were collected from bovine mastitis in China between 2013 and 2014 and were screened for 16S rRNA methylase genes (armA, rmtA, rmtB,(More)
In this paper, a quantum chemistry method was used to investigate the effect of different sizes of substituted phenanthrolines on absorption, energy transfer, and the electroluminescent performance of a series of Eu(TTA)(3)L (L = [1,10] phenanthroline (Phen), Pyrazino[2,3-f][1,10]phenanthroline (PyPhen), 2-methylprrazino[2,3-f][1,10]phenanthroline(MPP),(More)
Adjuvant therapies for breast cancer have achieved great success in recent years and early breast cancer is now a curable or chronic disease. Targeted therapies, including endocrine therapy and human epidermal growth factor receptor-2 targeted therapy, marked a new era of breast cancer treatment. However, except for chemotherapy, an efficient drug treatment(More)
Glyphosate resistance is tightly related to the cotton industry. Glyphosate treatments of plants always result in high levels of shikimate accumulation and a sharp reduction in the relative dry weight, severely affecting normal growth. In this study, a broad range of variations were observed for the shikimate contents and relative dry weights in three(More)
Based on bioactive screening results, two new iridoid glycosides, named rotunduside G (1) and rotunduside H (2), were isolated from the rhizomes of Cyperus rotundus, together with four known ones, negundoside (3), nishindaside (4), isooleuropein (5) and neonuezhenide (6). Their structures were elucidated on the basis of spectroscopic methods and from(More)
OBJECTIVE To investigate stress distribution of different material restored post-cores in dentine and provide a theoretical guidance for clinical use. METHODS A three-dimensional finite element model of maxillary central incisor restored with post-core and PFM crown was constructed by SCT scan technology. Based on this model, stress distribution in(More)
The single gold atom doped aluminum oxide clusters AuAl3O3(+), AuAl3O4(+), and AuAl3O5(+) have been prepared and mass-selected to react with CO, O2, and mixtures of CO and O2 in an ion trap reactor under thermal collision conditions. The reactions have been characterized by mass spectrometry with isotopic substitution ((16)O2 → (18)O2) and density(More)
A study was conducted to identify the differences in the decompositions of leaf litter, lignin and carbohydrate between coniferous forest and broadleaf forest at 20°C and 30°C in Huangshan Mountain, Anhui Province, China. Results showed that at 20°C mass loss of leaf litter driven by microbial decomposers was higher in broadleaf forest than that in(More)
Lanthanum oxide cluster anions are prepared by laser ablation and reacted with n-C(4)H(10) in a fast flow reactor. A time-of-flight mass spectrometer is used to detect the cluster distribution before and after the reactions. (La(2)O(3))(m=1-3)OH(-) and La(3)O(7)H(-) are observed as products, which suggests the occurrence of hydrogen atom abstraction(More)
Aluminum oxide cluster anions are produced by laser ablation and reacted with n-butane in a fast flow reactor. A reflectron time-of-flight mass spectrometer is used to detect the cluster distribution before and after the reactions. Aluminum oxide clusters Al₂O4,6⁻ and Al₃O₇⁻ can react with n-C₄H₁₀ to produce Al₂O4,6H⁻ and Al₃O₇⁻, respectively, while cluster(More)