Carbon-doped boron nitride nanosheets as an efficient metal-free catalyst for the selective oxidation of HS.

We report the first use of carbon-doped boron nitride (BCN) for HS-selective catalytic oxidation. The obtained carbon-doped BN with an ultrathin layer structure exhibits outstanding HS elimination and high S yield. In particular, BN doped carbon nanosheets display better catalytic performance than traditional catalysts, such as iron- and carbon-based catalysts.

Estimation of appropriate dietary intake of iodine among lactating women in China based on iodine loss in breast milk.

Objective: Data on iodine loss in breast milk, which are critical for establishing the appropriate dietary iodine intake for lactating women, is currently limited. A study was conducted to assess iodine loss in breast milk among Chinese lactating women to estimate the appropriate dietary intake of iodine.

Methods: A total of 54 pairs of healthy, lactating women and their infants aged 0-6 months were recruited from Tianjin and Luoyang cities in China.

Influence of Crowdsourcing Innovation Community Reference on Creative Territory Behavior.

Crowdsourcing innovation community has become an important platform for enterprises to gather group wisdom. However, how the crowdsourcing innovation community plays a reference role in creative crowdsourcing participation is unclear. Based on the reference group theory, taking online impression management as the explanatory framework, this study explores the impact of crowdsourcing innovation community reference on the creative territory behavior, and the differences in the crowdsourcing innovation community reference effect among members of different community age groups.

Efficiently Integrated Desulfurization from Natural Gas over Zn-ZIF-Derived Hierarchical Lamellar Carbon Frameworks.

Selective removal of carbonyl sulfide (COS) and hydrogen sulfide (HS) is the key step for natural gas desulfurization due to the highly toxic and corrosive features of these gaseous sulfides, and efficient and stable desulfurizers are urgently needed in the industry. Herein, we report a class of nitrogen-functionalized, hierarchically lamellar carbon frameworks (N-HLCF-xs), which are obtained from the structural transformation of Zn zeolitic imidazolate frameworks via controllable carbonization. The N-HLCF-xs possess the desirable characteristics of large Brunauer-Emmett-Teller surface areas (645-923 m/g), combined primary three-dimensional microporosity and secondary two-dimensional lamellar microstructure, and high density of nitrogen base sites with enhanced pyridine ratio (17.

Sustainable synthesis of ordered mesoporous materials without additional solvents.

Micelles with well-defined nanostructures were generally formed in the presence of a suitable solvent. We report herein the accelerated construction of micelles with ordered nanostructures without assistance of additional solvents. The micelles were employed for ultrafast fabrication of ordered mesoporous silicas (OMS) using tetramethyl orthosilicate (TMOS) as silica source.

Highly Poison-Resistant Single-Atom Co-N Active Sites with Superior Operational Stability over 460 h for H S Catalytic Oxidation.

Efficient catalytic elimination of hydrogen sulfide (H S) with high activity and durability in nature gas and blast-furnace gas is very critical for both fundamental catalytic research and applied environmental chemistry. Herein, atomically dispersed Co atom catalysts with Co-N sites that can transform H S into S with conversion rate of ≈100% are designed and prepared. The representative 4Co-N/NC achieves a sulfur yield of nearly 100% and TOF of 869 h at 180 °C.

Engineering of crystal phase over porous MnO with 3D morphology for highly efficient elimination of HS.

In the present work, we report a facile oxalate-derived hydrothermal method to fabricate α-, β- and δ-MnO catalysts with hierarchically porous structure and study the phase-dependent behavior for selective oxidation of HS over MnO catalysts. It was disclosed that the oxygen vacancy, reducibility and acid property of MnO are essentially determined by the crystalline phase. Systematic experiments demonstrate that δ-MnO is superior in active oxygen species, activation energy and HS adsorption capacity among the prepared catalysts.

Design of Efficient, Hierarchical Porous Polymers Endowed with Tunable Structural Base Sites for Direct Catalytic Elimination of COS and HS.

Hydrogen sulfide (HS) is malodorous and highly toxic, and its selective removal from industrial feedstock is highly recommended for safety and environment protection. We report here a class of nitrogen-functionalized, hierarchical porous polymers (N-HPPs) synthesized from one-step alkylation-induced cross-linking without any involvement of templates. The as-engineered N-HPPs are large in BET surface area (792-1397 m/g) and endowed with hierarchical porosity.

Efficient low-temperature soot combustion by bimetallic Ag-Cu/SBA-15 catalysts.

In this study, the effects of copper (Cu) additive on the catalytic performance of Ag/SBA-15 in complete soot combustion were investigated. The soot combustion performance of bimetallic Ag-Cu/SBA-15 catalysts was higher than that of monometallic Ag and Cu catalysts. The optimum catalytic performance was acquired with the 5Ag-Cu/SBA-15 catalyst, on which the soot combustion starts at T=225°C with a T=285°C.

Intercalation of nanostructured CeO in MgAlO spinel illustrates the critical interaction between metal oxides and oxides.

Heterogeneous catalytic oxidation arises from the prerequisite oxygen activation and transfer ability of metal oxide catalysts. Thus, engineering intercalated nanounits and heterophase metal oxide structures, and forming interstitial catalyst supports at the nanoscale level can drastically alter the catalytic performances of metal oxides. This is particularly important for ceria-based nanomaterial catalysts, where the interactions of reducible ceria (CeO) and nonreducible oxides are fundamental for the preparation of enhanced catalysts for oxygen-involved reactions.

Polymeric carbon nitride nanomesh as an efficient and durable metal-free catalyst for oxidative desulfurization.

We report the first use of polymeric carbon nitride (CN) for the catalytic selective oxidation of HS. The as-prepared CN with unique ultrathin "nanomeshes" structure exhibits excellent HS conversion and high S selectivity. In particular, the CN nanomesh also displays better durability in the desulfurization reaction than traditional catalysts, such as carbon- and iron-based materials.

Effect of siRNA-silencing of SALL2 gene on growth, migration and invasion of human ovarian carcinoma A2780 cells.

Background: The role of Spalt-like gene-2 (SALL2) in tumorigenesis remains incompletely elucidated. This study investigated the effects of SALL2 on human ovarian carcinoma (OC) A2780 cells and the probable mechanism.

Methods: Expression of SALL2 in human OC cell lines were detected by reverse transcription PCR (RT-PCR) and Western blot analysis.

Increased CCL19 expression is associated with progression in cervical cancer.

Cervical cancer is the third most common cancer and the fourth leading cause of malignancy related mortality in women worldwide. CCL19 is highly expressed in human cancer cells, and ligand CCL19 binding to CCR7 induces actin polymerization and pseudopodia formation. However, whether or not CCL19 is involved in EMT of human cervical cancer needs further investigation.

Clinical significance of leukocyte-associated immunoglobulin-like receptor-1 expression in human cervical cancer.

Leukocyte-associated immunoglobulin-like receptor-1 (LAIR-1) is broadly expressed on the majority of immune cells; however, the biological role of LAIR in solid tumors has yet to be elucidated. In the present study, using immunohistochemical staining analysis, the expression of LAIR-1 in human cervical cancer (HCC) and nontumor-adjacent tissue specimens was determined, and the results indicated that the expression of LAIR-1 in HCC tissue was higher compared with that in noncancerous tissue. The χ test was used to analyze the correlation between the expression of LAIR-1 in tumor tissues with clinicopathological parameters.

Highly efficient CuxO/TiO2 catalysts: controllable dispersion and isolation of metal active species.

Porous Cu(x)O/TiO2 architectures with enhanced dispersion of the active phase are synthesized by a facile MOF-templated method. Such a unique composite would furnish excellent catalytic activity for CO oxidation under relatively mild conditions.

Leukocyte-associated immunoglobulin-like receptor-1 is expressed on human megakaryocytes and negatively regulates the maturation of primary megakaryocytic progenitors and cell line.

Leukocyte-associated immunoglobulin-like receptor-1 (LAIR-1) is an inhibitory collagen receptor which belongs to the immunoglobulin (Ig) superfamily. Although the inhibitory function of LAIR-1 has been extensively described in multiple leukocytes, its role in megakaryocyte (MK) has not been explored so far. Here, we show that LAIR-1 is expressed on human bone marrow CD34(+)CD41a(+) and CD41a(+)CD42b(+) cells.

[Synthesis, spectral analysis and photocatalysis of Ag/K4Nb6,O17 heterojunction catalysts].

K4Nb6O17 photocatalyst was successfully synthesized by low-temperature hydrothermal method with layer structure. Considering that a large number of hydroxyl (Nb-OH) and oxygen species (Nb==O, Nb--O-) exist on the surface of K4Nb6O17 synthesized by hydrothermal method, Ag(en)2+ precursors were employed to synthesize Ag/K4Nb6O17 heterostructure photo-catalysts with highly dispersed Ag. Photocatalytic performance evaluation results show that the photodegradation rate of MO for K4Nb6O17 was remarkably improved when a small amont of Ag was loaded.

[Syntheses and spectral study of novel metal zinc organic phosphonate].

Two novel Zn2+ organic phosphonate Zn(4,4'-bipy)(HBCP) 1 and [Zn2 (phen)2 (BCP)(H2 BCP)].H2O2 were hydrothermally synthesized. The compound 1 is with two-dimensional layer framework whereas the compound 2 is zero-dimensional structure.

[2D correlation spectral study of a coordination polymer [Eu(PCPOA)3 (H2O)]n].

A novel two dimensional coordination polymer [Eu(PCPOA)3 (H2O)], was synthesized under hydrothermal condition. Based on the determination of the structure, the 2D correlation FTIR spectra with the perturbation of magnetism and the 2D correlation fluorescence spectra with the perturbation of temperature were investigated. The energy bonds were calculated using CASTEP Program of Material studio.

Synthesis and two-dimensional correlation infrared spectroscopy study of an organic-inorganic hybrid compound constructed by [Mo(5)P(2)O(23)] and Cu-imidazole components.

A novel compound, (Himi)(H(3)O) [Cu(imi)(2)](2)[P(2)Mo(5)O(23)].H(2)O 1 (imi=imidazole), was synthesized by hydrothermal method and characterized by X-ray single analysis, ESR spectrum, one-dimensional (1D) infrared spectroscopy and two-dimensional (2D) correlation infrared spectroscopy under thermal and magnetism perturbation. Crystal data for the compound 1: orthorhombic system, space group Pnma, a = 14.

[Spectral study of some polyoxovanadium borates].

Four novel polyoxovanadium borates with [(VO)12O6B18O42], namely (enH2)6 H3 [(VO)12O6B18O42].13H2O(1), [Ni (en)2]6 H3 [(VO)12 O6B18O42].8H2O(2), [Cu(en)2]5 H3 [(VO)12 O6B18 O42] [B(OH)3]2.