Pairing symmetry and properties of iron-based high temperature superconductors

Pairing symmetry is important to indentify the pairing mechanism. The analysis becomes particularly timely and important for the newly discovered iron-based multi-orbital superconductors. From group theory point of view we classified all pairing matrices (in the orbital space) that carry irreducible representations of the system. The quasiparticle gap falls into three categories: full, nodal and gapless. The nodal-gap states show conventional Volovik effect even for on-site pairing. The gapless states are odd in orbital space, have a negative superfluid density and are therefore unstable. In connection to experiments we proposed possible pairing states and implications for the pairing mechanism.Comment: 4 pages, 1 table, 2 figures, polished versio

Simple Combustion Production and Characterization of Octahydro[60]fullerene with a Non-IPR C-60 Cage

1. Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 3. Xiamen Univ, Sch Life Sci, Xiamen 361005, Peoples R ChinaFor the first time an easier, operable combustion method is employed for the synthesis of non-IPR fullerene, and an octahydro[60)fullerene with a non-IPA C-60 cage (C-60 isomer C-#1809(60)) produced by combustion is isolated and characterized by MS, UV vis, IR, and NMR spectroscopies in combination with DFT calculations. This finding shows that, in addition to chlorine, hydrogen can be an ample cataloreactant for the production of non-IPR fullerene derivatives under such conditions as arc-burning and diffusion combustion.NSFC 20525103 20673088 20973137 20721001 20423002 21031004 973 projects 2007CB815301 2007CB81530

An open science resource for establishing reliability and reproducibility in functional connectomics

Efforts to identify meaningful functional imaging-based biomarkers are limited by the ability to reliably characterize inter-individual differences in human brain function. Although a growing number of connectomics-based measures are reported to have moderate to high test-retest reliability, the variability in data acquisition, experimental designs, and analytic methods precludes the ability to generalize results. The Consortium for Reliability and Reproducibility (CoRR) is working to address this challenge and establish test-retest reliability as a minimum standard for methods development in functional connectomics. Specifically, CoRR has aggregated 1,629 typical individuals’ resting state fMRI (rfMRI) data (5,093 rfMRI scans) from 18 international sites, and is openly sharing them via the International Data-sharing Neuroimaging Initiative (INDI). To allow researchers to generate various estimates of reliability and reproducibility, a variety of data acquisition procedures and experimental designs are included. Similarly, to enable users to assess the impact of commonly encountered artifacts (for example, motion) on characterizations of inter-individual variation, datasets of varying quality are included

Proteomic analysis of Zhangzagu3 (Setaria italica) and its parents based on iTRAQ technique

Zhangzagu3, derived from Zhangzagu3fu and A2 (photoperiod- and thermo-sensitive genic male-sterile line) is well-known for its strong adaptability, good stability, disease, and lodging resistance. To evaluate the parental contributions to its elite traits, isobaric tags for relative and absolute quantitation (iTRAQ) and mass spectrometry (MS) were used to analyze the protein expression profile of these three lines. Enrichment analysis of differentially expressed proteins (DEPs) was performed through GO term and KEGG pathway. A total of 4015 proteins were detected, among which 504/390 DEPs between Zhangzagu3 and the female/male parent, respectively. The cluster analysis using Cluster 3.0 showed that the DEP expression profiles of Zhangzagu3 were closer to those of the male parent. GO functional classification divided the DEPs into three functional categories (cellular component, biological process and molecular function) and 71 subfamilies, among which three subfamilies had 100% difference between Zhangzagu3 and its parents. KEGG metabolic pathway exhibited significant enrichment of differentially expressed genes (DEGs) in Carbon metabolism (mainly Carbon fixation, Glycolysis and Gluconeogenesis), Photosynthesis and Oxidative phosphorylation. qRT-PCR verification confirmed the differential expression data and revealed that the expression level of 17 selected genes (such as putative receptor-like protein kinase, copper chaperone for superoxide dismutase etc.) was higher in Zhangzagu3 than that in its male parent, but significantly lower than that in A2. Thus, A2 can potentially optimize the agricultural qualities of Zhangzagu3. Taken together, we hope that this study provides valuable information for the further utilization and study on the molecular mechanisms of heterosis in hybrid millet. Abbreviations iTRAQisobaric tags for relative and absolute quantitation DEPsdifferentially expressed proteins DEGsdifferentially expressed genes PMSFphenylmethanesulfonyl fluoride HEPES4-(2-hydroxyethyl)-1-piperazine ethanesulfonic acid DTTdithiothreitol EDTAethylene diamine tetraacetic acid GOgene ontology IAMiodoacetamide MSmass spectrometry KEGGKyoto Encyclopedia of Genes and Genomes PVPPpolyvinylpolypyrrolidone HPLChigh performance liquid chromatography TCAtrichloroacetic acid TEABtetraethylammonium bicarbonate ACNacetonitrile HCDhigher collision energy dissociation FDRfalse discovery rate SDSsodium dodecyl sulphate qRT-PCRquantitative real-time polymerase chain reactio

The shrimp NF-κB pathway is activated by white spot syndrome virus (WSSV) 449 to facilitate the expression of WSSV069 (ie1), WSSV303 and WSSV371.

The Toll-like receptor (TLR)-mediated NF-κB pathway is essential for defending against viruses in insects and mammals. Viruses also develop strategies to utilize this pathway to benefit their infection and replication in mammal hosts. In invertebrates, the TLR-mediated NF-κB pathway has only been well-studied in insects and has been demonstrated to be important in antiviral responses. However, there are few reports of interactions between viruses and the TLR-mediated NF-κB pathway in invertebrate hosts. Here, we studied Litopenaeus vannamei Pelle, which is the central regulator of the Toll pathway, and proposed that a similar TLR/MyD88/Tube/Pelle/TRAF6/NF-κB cascade may exist in shrimp for immune gene regulation. After performing genome-wild analysis of white spot syndrome virus (WSSV) encoded proteins, we found that WSSV449 shows 15.7-19.4% identity to Tube, which is an important component of the insect Toll pathway. We further found that WSSV449 activated promoters of Toll pathway-controlled antimicrobial peptide genes, indicating WSSV449 has a similar function to host Tube in activating the NF-κB pathway. We suspected that WSSV449 activated the Toll-mediated NF-κB pathway for regulating viral gene expression. To test this hypothesis, we analyzed the promoters of viral genes and found 40 promoters that possess NF-κB binding sites. A promoter screen showed that the promoter activities of WSSV069 (ie1), WSSV303 and WSSV371 can be highly induced by the shrimp NF-κB family protein LvDorsal. WSSV449 also induced these three viral promoter activities by activating the NF-κB pathway. To our knowledge, this is the first report of a virus that encodes a protein similar to the Toll pathway component Tube to upregulate gene expression in the invertebrate host

Copper(I) and Copper(II) Uranyl Heterometallic Hybrid Materials

Two copper–uranium heterometallic compounds, [(UO₂)₃Cu^IIO₂(C₆NO₂)₅] (<b>1</b>) and [(UO₂)­Cu^I(C₆NO₂)₃] (<b>2</b>), have been synthesized by the reaction of uranyl acetate with copper salts in the presence of isonicotinic acid. Both compounds have been characterized by single-crystal X-ray diffraction, IR, Raman, and UV–vis spectroscopy. In compound <b>1</b>, interactions between copper and uranium centers occur and result in a three-dimensional pillar layered structure. Compound <b>1</b> is also the first example of a heterometallic uranyl organic framework with a trinuclear U₃O₁₈ building block. Compound <b>2</b> is the first uranyl organic framework that contains monovalent copper, which arises from the reaction of Cu­(II) chloride and is assumed to be due to the oxidation of chloride at low pH