7,950 research outputs found
Non-strange partner of strangeonium-like state Y(2175)
Inspired by the observed Y(2175) state, we predict its non-strange partner
Y(1915), which has a resonance structure with mass around 1915 MeV and width
about MeV. Experimental search for Y(1915) is proposed by
analyzing the or invariant mass spectrum of
the and processes, which are accessible at Belle, BaBar, BESIII and
forthcoming BelleII. Considering similarity between two families, the
comparison of the mass spectra of and families can provide
important information on the 1D state of family, , which has
a very broad resonance structure with mass around 1910 MeV regarded as the
strangeonium partner of . This also answers the question why the
1D state is still missing in experiment. This is supported by our
former study on the properties of Y(2175), which explains Y(2175) as the 2D
strangeonium because our theoretical total width is comparable with the Belle
data.Comment: 5 pages, 5 figures. More discussions and numerical results added.
Typos correcte
Hemicellulose-g-PAAc/TiO2 Nanocomposite Hydrogel for Dye Removal
Dyes pollution on urban environment is of great concern because of the human health hazards associated with this kind of contaminants, and the use of low-cost photocatalytic composite material is an efficient treatment method to minimize the environmental impact. A novel hemicellulose-g-PAAc/TiO2 composite hydrogel was prepared as a promising alternative material for dye removal. Wheat straw hemicellulose and TiO2 nanoparticles were first modified and then incorporated into hydrogel via covalent bonds. Effects of gel dosage, pH, initial concentration and contact time on the adsorption amount of methylene blue were systematically studied using the prepared hydrogel. The equilibrium adsorption data was fitted well to the Freundlich isotherm model, and Langmuir isotherm analysis indicated that the adsorption capacity of the hemicellulose-g-PAAc/TiO2 composite hydrogel was 389.1 mg/g, and adsorption kinetic study showed that the adsorption process can be described by the pseudo second-order kinetic model. The prepared composite hydrogel exhibited high photodegradation ability for methylene blue under alkaline conditions, and all results indicated that the hemicellulose-g-PAAc/TiO2 composite hydrogel had excellent photocatalytic degradability for dyes, which can be used in practical process
Recommended from our members
Difluoroalkylative carbonylation of alkenes to access carbonyl difluoro-containing heterocycles: convenient synthesis of gemigliptin
Fluorinated heterocycles play a vital role in pharmaceutical and agrochemical industries. Hence, rapid and efficient construction of fluorinated heterocycles remains highly demanded. Herein, a difluoroalkylative carbonylative cyclization of unactivated alkenes and ethylene gas enabled by palladium catalysis has been developed for the first time toward the synthesis of α-carbonyl difluoro-modified glutarimides. This procedure can also be applied to the synthesis of GeMigliptin which is a medicine approved for the treatment of type 2 diabetes mellitus. [Figure not available: see fulltext.
Magnetic surface on nonmagnetic bulk of electride Hf2S
Recent experiment reported the self-passivated electride Hf2S with excellent
stability and continuous electrocatalytic ability [S. H. Kang et al., Sci. Adv.
6, eaba7416 (2020)]. Starting from its 2H-type layered structure, we have
studied the electronic, magnetic, and transport properties of the electride
Hf2S in the monolayer and multilayer forms by combining first-principles
electronic structure calculations and Kubo formula approach. Our calculations
indicate that these thin films of Hf2S electride are both dynamically and
thermodynamically stable. Astonishingly, the calculations further show that the
outmost Hf atoms and the surface electron gas of the Hf2S multilayers are spin
polarized, while the inner Hf atoms and the electron gas in the interlayer
regions remain nonmagnetic. Due to the magnetic surface, the multilayer Hf2S
exhibits many unusual transport properties such as the surface anomalous Hall
effect and the electric-field-induced layer Hall effect. Our theoretical
predictions on Hf2S call for future experimental verification.Comment: 5 pages, 5 figures, 34 reference
Molluscicidal efficacies of different formulations of niclosamide: result of meta-analysis of Chinese literature
The control efforts on Oncomelania hupensis, the intermediate snail host of Schistosoma japonicum, cannot be easily excluded from the integrated approach of schistosomiasis control in China. Application of chemical compounds, molluscicides, in snail habitats is a common method for snail control in addition to environmental modification. We conducted a systematic review and meta-analysis to assess the molluscicidal effects of the currently recommended 50% niclosamide ethanolamine salt wettable powder and a new 4% niclosamide ethanolamine salt powder developed by Chinese researchers. Literature was searched from three Chinese databases, i.e. Chinese Biomedical Database, VIP Database and Wanfang Database, on field mollusciciding trials of niclosamide in China (from January 1, 1990 to April 1, 2010). Molluscicidal effects on reduction of snail population of the 50% or 4% niclosamide formulations in field trial were evaluated 3 days, 7 days or 15 days post-application. Out of 90 publications, 20 papers were eventually selected for analysis. Publication bias and heterogeneity tests indicated that no publication bias existed but heterogeneity between studies was present. Meta-analysis in a random effect model showed that the snail mortality of 3, 7 and 15 days after spraying the 50% niclosamide ethanolamine salt wettable powder were 77% [95%CI: 0.68-0.86], 83% [95%CI: 0.77-0.89], and 88% [95%CI: 0.82-0.92], respectively. For the 4% niclosamide ethanolamine salt powder, the snail mortality after 3, 7 and 15 days were 81% [95%CI: 0.65-0.93], 90% [95%CI: 0.83-0.95] and 94% [95%CI: 0.91-0.97], respectively. Both are good enough to be used as molluscicides integrated with a schistosomiasis control programme. The 4% niclosamide ethanolamine salt powder can be applied in the field without water supply as the surrogate of the current widely used 50% niclosamide ethanolamine salt wettable powder. However, to consolidate the schistosomiasis control achievement gained, it is necessary to continuously perform mollusciciding more than twice annually in the field
Development of an Early Prediction Model for Subarachnoid Hemorrhage With Genetic and Signaling Pathway Analysis
Distributed quantum computing over 7.0 km
Distributed quantum computing provides a viable approach towards scalable
quantum computation, which relies on nonlocal quantum gates to connect distant
quantum nodes, to overcome the limitation of a single device. However, such an
approach has only been realized within single nodes or between nodes separated
by a few tens of meters, preventing the target of harnessing computing
resources in large-scale quantum networks. Here, we demonstrate distributed
quantum computing between two nodes spatially separated by 7.0 km, using
stationary qubits based on multiplexed quantum memories, flying qubits at
telecom wavelengths, and active feedforward control based on field-deployed
fiber. Specifically, we illustrate quantum parallelism by implementing
Deutsch-Jozsa algorithm and quantum phase estimation algorithm between the two
remote nodes. These results represent the first demonstration of distributed
quantum computing over metropolitan-scale distances and lay the foundation for
the construction of large-scale quantum computing networks relying on existing
fiber channels.Comment: 6 pages, 3 figure
Recommended from our members
A Comparison of Computational Methods for Identifying Virulence Factors
Bacterial pathogens continue to threaten public health worldwide today. Identification of bacterial virulence factors can help to find novel drug/vaccine targets against pathogenicity. It can also help to reveal the mechanisms of the related diseases at the molecular level. With the explosive growth in protein sequences generated in the postgenomic age, it is highly desired to develop computational methods for rapidly and effectively identifying virulence factors according to their sequence information alone. In this study, based on the protein-protein interaction networks from the STRING database, a novel network-based method was proposed for identifying the virulence factors in the proteomes of UPEC 536, UPEC CFT073, P. aeruginosa PAO1, L. pneumophila Philadelphia 1, C. jejuni NCTC 11168 and M. tuberculosis H37Rv. Evaluated on the same benchmark datasets derived from the aforementioned species, the identification accuracies achieved by the network-based method were around 0.9, significantly higher than those by the sequence-based methods such as BLAST, feature selection and VirulentPred. Further analysis showed that the functional associations such as the gene neighborhood and co-occurrence were the primary associations between these virulence factors in the STRING database. The high success rates indicate that the network-based method is quite promising. The novel approach holds high potential for identifying virulence factors in many other various organisms as well because it can be easily extended to identify the virulence factors in many other bacterial species, as long as the relevant significant statistical data are available for them
MAGeCK enables robust identification of essential genes from genome-scale CRISPR/Cas9 knockout screens
We propose the Model-based Analysis of Genome-wide CRISPR/Cas9 Knockout (MAGeCK) method for prioritizing single-guide RNAs, genes and pathways in genome-scale CRISPR/Cas9 knockout screens. MAGeCK demonstrates better performance compared with existing methods, identifies both positively and negatively selected genes simultaneously, and reports robust results across different experimental conditions. Using public datasets, MAGeCK identified novel essential genes and pathways, including EGFR in vemurafenib-treated A375 cells harboring a BRAF mutation. MAGeCK also detected cell type-specific essential genes, including BCR and ABL1, in KBM7 cells bearing a BCR-ABL fusion, and IGF1R in HL-60 cells, which depends on the insulin signaling pathway for proliferation. Electronic supplementary material The online version of this article (doi:10.1186/s13059-014-0554-4) contains supplementary material, which is available to authorized users
- …