Heterogeneous element doping carbon-coated transition metal oxides has been reported as an effective way to increase conductivity and accommodate volume changes during the charge/discharge of ...lithium-ion batteries thereby improving structural stability and cycle performance. Herein, we have successfully synthesized Co/CoO@N-C nanocomposites using polydopamine as a source of carbon and nitrogen via a simple one-step method. Owing to its desirable structural features, the as-synthesized Co/CoO@N-C nanocomposite anode manifests a greatly improved initial capacity of 1541 mAh g−1 and retains a high reversible value of 1115 mAh g−1 at a current density of 200 mA g−1 after 125 cycles. The morphology and physicochemical properties of the Co/CoO@N-C nanocomposites were characterized to provide insights into the promotional roles of nitrogen-doped carbon matrix and CoO loaded nanoparticles. The results demonstrate the potential of the Co/CoO@N-C nanocomposite as a promising anode material for lithium-ion batteries.
•The synthetic method we applied is effective and simple.•The Co/CoO is embedded into N-C layers to synthesize Co/CoO@N-C materials.•The anode materials exhibit excellent reversible capacities and rate performances.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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•A new Sm(Co,Fe,Cu)4B/Sm2(Co,Fe,Cu)7 cell structure was obtained.•The microstructural models of the as-spun and annealed ribbons were drawn.•The change in atomic structure before and ...after annealing was analyzed by EXAFS.•The coercivity was quantitatively analyzed by domain wall pinning mechanism.•The coercivity at 0 K is estimated by low temperature magnetic hardening effect.
A new Sm(Co,Fe,Cu)4B/Sm2(Co,Fe,Cu)7 cell structure is found, and its phase composition, microstructure and magnetic properties are investigated. Particularly, the atom structure of main phase is analyzed by extended X-ray absorption fine structure. It was found that as-spun SmCo2.94FeCu0.06B ribbons were composed of amorphous phase and approximate equiaxed Sm(Co,Fe,Cu)4B nanocrystallines. The high disorder of the nanocrystallines leads to the low magnetic anisotropy. After the as-spun ribbons were annealed at 800 °C for 30 min, the amorphous phase disappeared completely. The short rod-shaped Sm(Co,Fe,Cu)4B grains have a staggered distribution accompanied by ∼8 vol% lamellar Sm2(Co,Fe,Cu)7 phase at grain boundaries, and the new cell/cell-wall-type Sm(Co,Fe,Cu)4B/Sm2(Co,Fe,Cu)7 microstructure is produced. The annealed ribbons show an ultra-high coercivity of up to 5.01 T at room temperature, 40.64 T at 5 K (obtained by extrapolating), and estimated to be ∼ 41.96 T at 0 K. The microstructureal models of both ribbons are created and the coercivity mechanism is discussed in detail.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
Four Cd(ii) coordination polymers formulated as {Cd sub(3)(tpcb) sub(2))( eta , eta - mu -SO sub(4)) sub(2)(H sub(2)O) sub(6)SO sub(4). 16H sub(2)O} sub(n) (1), {Cd(tpcb) sub(0.75)(OH)(H sub(2) O) ...sub(2)(NO sub(3))} sub(n) (2), {Cd sub(2)(tpcb)(SO sub(4)) sub(2)(H sub(2)O) sub(6).2MeOH.3H sub(2)O} sub(n) (3), and {Cd(tpcb)(NO sub(3))(H sub(2)O) sub(2)(NO sub(3))} sub(n) (4) were synthesized by reactions of CdSO sub(4) or Cd(NO sub(3)) sub(2) with tetrakis(4-pyridyl)cyclobutane (tpcb) under solvothermal conditions or at ambient temperature. Compounds 1-4 were characterized by elemental analysis, IR spectroscopy, thermal analysis, powder X-ray diffraction analysis and single crystal X-ray diffraction. Compounds 1, 2, and 4 possess three different complicated 3D frameworks with the Schlaefli symbols of (4 super(6))(4 super(12).5 super(4).6 super(4).8 super(8)), (6 super(3)) sub(4)(6 super(2).8 super(4)) sub(3 ) and (8 super(3))(8 super(6)), respectively, while 3 presents a 1D chain structure. Compounds 1-4 exhibited relatively good photocatalytic activity towards the degradation of methyl orange (MO), methyl blue (MB) and rhodamine B (RhB) in aqueous solution. These results offered a good insight into the temperature effects on the assembly of Cd(ii) coordination polymers and their photocatalytic applications.
The diagnosis of mediastinal space‐occupying lesions largely relies on X‐ray and computed tomography. However, thanks to technological progress, transthoracic echocardiography can clearly display the ...mediastinal structures surrounding the heart and great vessels, thereby improving the detection rate of mediastinal space‐occupying lesions. Primary mediastinal teratoma is relatively rare, and removal of giant mediastinal teratoma by thoracoscopic surgery has rarely been reported. Here, we report a case of giant mediastinal teratoma diagnosed by transthoracic echocardiography, which was treated by complete thoracoscopic resection and confirmed by histology.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Abstract Objective The goal of this study was to extend the known repertoire of microRNAs (miRNAs) expressed in urothelial bladder cancer (BCa) of the Chinese population and further understand the ...molecular events of miRNAs underlying urothelial bladder tumorigenesis at the global genome level. Materials and methods We separated well-characterized epithelial tumor cells from 20 moderately differentiated or poorly differentiated BCa specimens by laser capture microdissection (LCM) and pooled these cells of interest prior to RNA analysis. Ten normal bladder epithelia (NBE) samples were pooled as the control. After preparation of small RNAs library, the 2 samples were sequenced simultaneously by the next generation high through-put Solexa sequencing technology. Results We employed the next generation high through-put Solexa sequencing technology to clone and identify miRNAs in BCa and NBE, and generated 11,146,610, and 10,263,845 high quality sequence reads, respectively. According to the analysis of size distribution, 22 nt class was the most abundant group of small RNAs in the BCa. Likewise, the 20 and 22 nt sequences were significantly greater than shorter or longer sequences, and accounted for 59.55% of the total sequence number of NBE library. The whole-genome-scale data mining suggested that BCa and NBE libraries both contained multiple and heterogeneous small RNA species. On further analysis, the sequencing data revealed that different miRNAs showed clearly in-house differential expression levels in BCa and NBE and 74 miRNAs aberrantly expressed between BCa and NBE at the global genome level. We also predicted 13 novel miRNAs in both BCa and NBE libraries. Conclusions Our results suggest that BCa miRNAs include a large proportion of conserved miRNAs and a set of non-conserved miRNAs with low expression levels. These known and newly identified miRNAs at the population level significantly enhance our knowledge of BCa miRNAs expression profiling and provide insights into miRNAs oncogenesis and oncotherapy in BCa. Further studies are necessary to elucidate the roles of miRNAs in urothelial bladder tumorigenesis and determine the potential of miRNAs as diagnostic and prognostic tools or therapeutic targets for BCa in the future.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
A set of four metal-organic frameworks, namely, Zn(1,3-BDC)(bmimb) sub()n(1), Zn(1,4-BDC)(bmimb) sub()n(2), Cd(1,3-BDC)(bmimb) sub()n(3), and Cd(1,4-BDC)(bmimb) sub()n(4), have been prepared under ...solvothermal conditions (1,3-BDC = 1,3-benzenedicarboxylate; 1,4-BDC = 1,4-benzenedicarboxylate; bmimb = 4,4'-bis(4-methyl-1-imidazolyl)biphenyl). The long bmimb ligand (N...N separation of ca.14.1 Aa) induces interpenetration of 1, 2 and 4 to increase both the framework stability and the density of effective catalytic metal centers. Compounds 1, 2 and 4 are interpenetrated 3D structures while 3 features a 2D structure. Compound 1 exhibits a parallel 2D arrow right 3D polycatenation while 2 and 4 are isomorphous and feature 3D arrow right 3D interpenetration. Compounds 1-4 fluoresce in the range of 350-372 nm in the solid state, whereas compounds 2 and 3 catalyze the almost complete photodegradation of rhodamine B (RhB) in water within ca.4 h and can be recycled at least five times without loss in their crystallinity.
As a material with good biocompatibility, hydroxyapatite (HAP) can have optical properties after doping with various rare earth ions. As a biocompatible fluorescent material, doped HAP could have ...broad applications in biological probes, drug delivery, optoelectronic materials, fluorescence anti-counterfeiting, and other aspects. In this paper, we put forward the preparation of HAP doped with terbium (III) ions (Tb
3+
) by hydrothermal co-precipitation. By controlling the Tb
3+
doping content in reaction and the reaction time, the changes in HAP’s structure, morphology, and luminescence properties under different conditions were studied. When the doping amount of Tb
3+
reached an optimal value, the dipole-quadrupole would occur and the concentration would be quenched. The control experiment showed that the optimal Tb
3+
content was 7.5 × 10
–5
mol, which showed the best fluorescence performance. HAP, a non-luminous material, was rarely used in the field of fluorescent anti-counterfeiting and photoelectric devices. We proposed to prepare a luminescent aramid/polyphenylene sulfide (ACFs/PPS) fiber paper and a new light-emitting diode (LED) using the Tb-doped HAP phosphor. The composite sample exhibited an excellent stability and fluorescence performance, which also demonstrated a possibility of HAP applications in anti-counterfeiting and photoelectric. The introduction of Tb
3+
dopant HAP was done to give HAP optical properties and broaden the application range of HAP.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Mitral valve myxoma is a very rare entity. Multiple myxomas with extensive involvement of the anterior and posterior leaflets of the mitral valve are exceedingly rare. We report a 58-year-old man who ...was admitted as sudden syncope. Thoracic echocardiography showed several masses adherent to the anterior and posterior leaflets and the mitral annulus with obvious mobility. Intraoperative probing revealed multiple tumors attached to the mitral annulus, valve leaflets, and tendinous cords. Mechanical mitral valve replacement was performed. Histopathological examination confirmed all tumors to be myxomas.
Bladder cancer is the most common malignancy of the urinary system. Compound Kushen Injection (CKI) is a Chinese medicinal preparation that has been widely used in the treatment of various types of ...cancers in the past two decades. However, the pharmacological effect of CKI on bladder cancer is not still completely understood. In the current study, network pharmacology combined with bioinformatics was used to elucidate the therapeutic mechanism and potential targets of CKI in bladder cancer. The mechanism by which CKI was effective against bladder cancer was further verified in vitro using human bladder cancer cell line T24. Network pharmacology analysis identified 35 active compounds and 268 target genes of CKI. Bioinformatics data indicated 5500 differentially expressed genes associated with bladder cancer. Common genes of CKI and bladder cancer suggested that CKI exerted anti-bladder cancer effects by regulating genes such as MMP-9, JUN, EGFR, and ERK1. Functional enrichment analysis indicated that CKI exerted therapeutic effects on bladder cancer by regulating certain biological processes, including cell proliferation, cell migration, and cell apoptosis. In addition, Kyoto Encyclopedia of Genes and Genomes enrichment analysis implicated pathways related to cancer, bladder cancer, and the PI3K-Akt signaling pathway. Consistently, cell experiments indicated that CKI inhibited the proliferation and migration of T24 cells, and induced their apoptosis. Moreover, RT-qPCR and Western blot results demonstrated that CKI was likely to treat bladder cancer by down-regulating the gene and protein expression of MMP-9, JUN, EGFR, and ERK1. CKI inhibited the proliferation and migration, and induced the apoptosis of T24 bladder cancer cells through multiple biological pathways and targets. CKI also exhibited significant effects on the regulation of key genes and proteins associated with bladder cancer. Overall, our findings provide solid evidence and deepen current understanding of the therapeutic effects of CKI for bladder cancer, and further support its clinical use.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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