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For exploring the electron emission's mechanism of nano-diamond under different temperature and vacuum degree, determine its limit working parameters, the nano-diamond coating's field emission cathode was experimentally studied. The results show that the temperature rise has an impact on the field emission of titanium-based nano-diamonds. When the temperature exceeds 120 °C, the titanium matrix will emit a large number of electrons to form a larger emission current and drown the field emission current. The degree of vacuum will decrease as the temperature increases. This achievement provides a certain foundation for the design and manufacture of nano-diamond field emission displays. [ABSTRACT FROM AUTHOR]

Phytochemical study on the aerial parts ofAnemone taipaiensisfor the first time led to the isolation of two new oleanane-type triterpenoid saponins1and2, together with four known saponins (3–6). Their structures were elucidated by extensive spectroscopic analysis and chemical evidences. Saponins2–4exhibited cytotoxicity against human glioblastoma U251MG cell line with IC50values ranging from 1.56 to 80.62 μM. [ABSTRACT FROM PUBLISHER]

Fourteen diaryl thioureas which are physiologically active have been synthesized in the solid state at room temperature. The reaction needs only simple equipment and gives excellent yields. [ABSTRACT FROM AUTHOR]

The Botia superciliaris is endemic to China and distributed mainly in the upper reaches of the Yangtze River. The complete mitochondrial genome was 16,597 bp in length, which contained 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and 1 displacement loop (D-loop) locus. Except for the ND6 gene and eight tRNA genes, all other mitochondrial genes were encoded on the heavy strand. The overall nucleotide composition was 31.6% A, 25.5% T, 27.2% C and 15.7% G, with an AT content of 57.1%. The gene composition and the structural arrangement of the B. superciliaris complete mtDNA were identical to most of the other vertebrates. The molecular data here we presented could play a useful role to study the evolutionary relationships and population genetics of Cobitidae fish. [ABSTRACT FROM AUTHOR]

The complete mitochondrial genome sequence of Coal Tit (Parus ater) consisted 16,783 bp, the genome harbored the same gene order with that of other birds, contained 13 protein-coding genes, 22 tRNAs, 2 rRNAs, and 1 non-coding control region. The all tRNAs can formed typical cloverleaf secondary structures (excluding tRNASer-AGY). A total of 38 base mismatches appeared, mainly 28 for G-U mismatch, 5 for A-C mismatch, 2 for U-U mismatch. The third loci of codon existed obvious base bias. The control region was between tRNAGluand tRNAPhe, consisted 1195 bp, no repetitive sequence. [ABSTRACT FROM PUBLISHER]

The complete mitochondrial genome of Shorthead catfish ( Pelteobagrus eupogon) was obtained by DNA sequencing based on the PCR fragments. The entire genome was 16,562 bp in length, with a gene content of 13 protein-coding, 2 ribosomal RNA, and 22 transfer RNA genes, and order identical to that observed in most other vertebrates. Those genes are arranged compactly with no introns and few intergenic nucleotides. Molecular data here presented provide a useful toll for evolutionary as well as population genetic studied. [ABSTRACT FROM AUTHOR]