380 research outputs found
USE OF THE STATE-TRAIT ANXIETY INVENTORY WITH CHILDREN AND ADOLESCENTS IN CHINA: ISSUES WITH REACTION TIMES
The State-Trait Anxiety Inventory (Form Y; STAI-Y) is a balanced scale with a complex factor structure. Using survey data from children and adolescents in Jiangxi Province, China (N = 1,275), we conducted confirmatory factor analysis to clarify the number of factors in this instrument and to investigate the relationship between reaction time (RT) and anxiety. Results revealed the following 3 dimensions for the STAI-Y: anxiety absent, anxiety present, and general anxiety. Compared with those who answered all the questions (58%), those who missed questions (42%) had a lower education level, a longer RT, and higher scores for items indicating the presence of state or trait anxiety. Our results could provide innovative directions for the improvement and expansion of research using the STAI-Y with children and adolescents
A MATHEMATICAL MODEL OF THE CORRUGATED PLATES PACKING OIL-WATER SEPARATOR
A new high-efficiency oil-water separator was developed by the authors and their coworkers
[1]. The device appears like a horizontal container. Except for the parts of intake
and outlet for water and the oil collecting chambers, the main body of this device is the
separation chamber, in which the inclined corrugated plates are used as the separation
medium
Symmetry classes of dissipative topological insulators with edge dark state
We classify the dissipative topological insulators (TIs) with edge dark
states (EDS) by using the 38-fold way of non-Hermitian systems in this paper.
The dissipative dynamics of these quadratic open fermionic systems is captured
by a non-Hermitian single-particle matrix which contains both the internal
dynamics and the dissipation, refereed to as damping matrix . And the dark
states in these systems are the eigenmodes of which the eigenvalues'
imaginary part vanishes. However, there is a constraint on , namely that the
modes in which the eigenvalues' imaginary parts are positive are forbidden. In
other words, the imaginary line-gap of is ill-defined, so the topological
band theory classifying the dark states can not be applied to . To reveal
the topological protection of EDS, we propose the double damping matrix
, where the imaginary line-gap is
well defined. Thus, the 38-fold way can be applied to , and the
topological protection of the EDS is uncovered. Different from previous studies
of EDS in purely dissipative dynamics, the EDS in the dissipative TIs are
robust against the inclusion of Hamiltonians. Furthermore, the topological
classification of not only reflects the topological protection of
EDS in dissipative TIs but also provides a paradigm to predict the appearance
of EDS in other open free fermionic systems.Comment: 8 pages, 4 figure
Draft Genome of the Leopard Gecko, \u3cem\u3eEublepharis Macularius\u3c/em\u3e
Background
Geckos are among the most species-rich reptile groups and the sister clade to all other lizards and snakes. Geckos possess a suite of distinctive characteristics, including adhesive digits, nocturnal activity, hard, calcareous eggshells, and a lack of eyelids. However, one gecko clade, the Eublepharidae, appears to be the exception to most of these ‘rules’ and lacks adhesive toe pads, has eyelids, and lays eggs with soft, leathery eggshells. These differences make eublepharids an important component of any investigation into the underlying genomic innovations contributing to the distinctive phenotypes in ‘typical’ geckos. Findings
We report high-depth genome sequencing, assembly, and annotation for a male leopard gecko, Eublepharis macularius (Eublepharidae). Illumina sequence data were generated from seven insert libraries (ranging from 170 to 20 kb), representing a raw sequencing depth of 136X from 303 Gb of data, reduced to 84X and 187 Gb after filtering. The assembled genome of 2.02 Gb was close to the 2.23 Gb estimated by k-mer analysis. Scaffold and contig N50 sizes of 664 and 20 kb, respectively, were compble to the previously published Gekko japonicus genome. Repetitive elements accounted for 42 % of the genome. Gene annotation yielded 24,755 protein-coding genes, of which 93 % were functionally annotated. CEGMA and BUSCO assessment showed that our assembly captured 91 % (225 of 248) of the core eukaryotic genes, and 76 % of vertebrate universal single-copy orthologs. Conclusions
Assembly of the leopard gecko genome provides a valuable resource for future comptive genomic studies of geckos and other squamate reptiles
Draft genome of the leopard gecko, <i>Eublepharis macularius</i>
BACKGROUND: Geckos are among the most species-rich reptile groups and the sister clade to all other lizards and snakes. Geckos possess a suite of distinctive characteristics, including adhesive digits, nocturnal activity, hard, calcareous eggshells, and a lack of eyelids. However, one gecko clade, the Eublepharidae, appears to be the exception to most of these ‘rules’ and lacks adhesive toe pads, has eyelids, and lays eggs with soft, leathery eggshells. These differences make eublepharids an important component of any investigation into the underlying genomic innovations contributing to the distinctive phenotypes in ‘typical’ geckos. FINDINGS: We report high-depth genome sequencing, assembly, and annotation for a male leopard gecko, Eublepharis macularius (Eublepharidae). Illumina sequence data were generated from seven insert libraries (ranging from 170 to 20 kb), representing a raw sequencing depth of 136X from 303 Gb of data, reduced to 84X and 187 Gb after filtering. The assembled genome of 2.02 Gb was close to the 2.23 Gb estimated by k-mer analysis. Scaffold and contig N50 sizes of 664 and 20 kb, respectively, were comparable to the previously published Gekko japonicus genome. Repetitive elements accounted for 42 % of the genome. Gene annotation yielded 24,755 protein-coding genes, of which 93 % were functionally annotated. CEGMA and BUSCO assessment showed that our assembly captured 91 % (225 of 248) of the core eukaryotic genes, and 76 % of vertebrate universal single-copy orthologs. CONCLUSIONS: Assembly of the leopard gecko genome provides a valuable resource for future comparative genomic studies of geckos and other squamate reptiles. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s13742-016-0151-4) contains supplementary material, which is available to authorized users
Coexistence of Logarithmic and SdH Quantum Oscillations in Ferromagnetic Cr-doped Tellurium Single Crystals
We report the synthesis of transition-metal-doped ferromagnetic elemental
single-crystal semiconductors with quantum oscillations using the physical
vapor transport method. The 7.7 atom% Cr-doped Te crystals (Cr_Te) show
ferromagnetism, butterfly-like negative magnetoresistance in the low
temperature (< 3.8 K) and low field (< 0.15 T) region, and high Hall mobility,
e.g., 1320 cm2 V-1 s-1 at 30 K and 350 cm2 V-1 s-1 at 300 K, implying that
Cr_Te crystals are ferromagnetic elemental semiconductors. When B // c // I,
the maximum negative MR is -27% at T = 20 K and B = 8 T. In the low temperature
semiconducting region, Cr_Te crystals show strong discrete scale invariance
dominated logarithmic quantum oscillations when the direction of the magnetic
field B is parallel to the [100] crystallographic direction and show Landau
quantization dominated Shubnikov-de Haas (SdH) oscillations for B // [210]
direction, which suggests the broken rotation symmetry of the Fermi pockets in
the Cr_Te crystals. The findings of coexistence of multiple quantum
oscillations and ferromagnetism in such an elemental quantum material may
inspire more study of narrow bandgap semiconductors with ferromagnetism and
quantum phenomena.Comment: 25 pages, 25 figure
Effect of Corilagin on the Proliferation and NF- κ
Background. This study is to explore the effect of corilagin on the proliferation and NF-κB signaling pathway in U251 glioblastoma cells and U251 glioblastoma stem-like cells. Methods. CD133 positive U251 glioblastoma cells were separated by immunomagnetic beads to isolate glioblastoma stem-like cells. U251 cells and stem-like cells were intervened by different corilagin concentrations (0, 25, 50, and 100 μg/mL) for 48 h, respectively. Cell morphology, cell counting kit-8 assay, flow cytometry, dual luciferase reporter assay, and a western blot were used to detect and analyze the cell proliferation and cell cycle and investigate the expression of IKBα protein in cytoplasm and NF-κB/p65 in nucleus. Results. Corilagin inhibited the cell proliferation of U251 cells and their stem-like cells and the inhibition role was stronger in U251 stem-like cells (P<0.05). The cell cycle was arrested at G2/M phase in the U251 cells following corilagin intervention; the proportion of cells in G2/M phase increased as the concentration of corilagin increased (P<0.05). The U251 stem-like cells were arrested at the S phase following treatment with corilagin; the proportion of cells in the S phase increased as the concentration of corilagin increased (P<0.05). The ratio of dual luciferase activities of U251 stem-like cells was lower than that of U251 cells in the same corilagin concentration. With increasing concentrations of corilagin, the IKBα expression in cytoplasm of U251 cells and U251 stem-like cells was increased, but the p65 expression in nucleus of U251 cells and U251 stem-like cells was decreased (P<0.05). Conclusion. Corilagin can inhibit the proliferation of glioblastoma cells and glioblastoma stem-like cells; the inhibition on glioblastoma stem-like cell proliferation is stronger than glioblastoma cells. This different result indicates that the effect of corilagin on U251 cells and U251 stem-like cells may have close relationships with mechanism of cell cycle and NF-κB signaling pathway; however, the real antitumor mechanism of corilagin is not yet clear and requires further study
Prevalence and genotyping of Toxoplasma gondii in naturally-infected synanthropic rats (Rattus norvegicus) and mice (Mus musculus) in eastern China
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