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Degradation of acetamiprid in wastewater was studied in a dielectric barrier discharge (DBD) reactor. This reactor produces ultraviolet light and reactive species like ozone (O3) can be used for the treatment of wastewater. We examined the factors that could affect the degradation process, including the discharge power, and the initial concentrations of acetamiprid, and O3 which is generated by the DBD reactor. We also investigated the effect of adding Na2B4O7 as a radical scavenger to probe the role of hydroxyl radical in the reaction. The results indicated that acetamiprid could be removed from aqueous solution effectively and hydroxyl radicals played an important role during the degradation by the low temperature plasma. The degradation process of acetamiprid fits the first-order kinetics. The degradation efficiency was 83.48 percent at 200min when the discharge power was 170W and the initial acetamiprid concentration was 50mg/L. The removal efficiency of acetamiprid decreased with the increasing concentration of Na2B4O7 because B4O7 2− is an excellent radical scavenger that inhibited the generation of OH during the DBD process. The removal efficiency of acetamiprid improved in the presence of O3. The main reason was that O3 can oxidize certain organic compounds directly or indirectly by generating hydroxyl radicals. The degradation products of acetamiprid were characterized qualitatively and quantitatively using high performance liquid chromatography, mass spectrometry and UV–vis spectroscopy. [Copyright &y& Elsevier]

Abstract: A Hilbert space operator T has the single valued extension property if the only analytic function f which satisfies is . Clearly the point spectrum of any operator which has empty interior must have the single valued extension property. Using the induced spectrum of “consistent in Fredholm and index”, we investigate the stability of single valued extension property under compact perturbations, and we characterize those operators for which the single valued extension property is stable under compact perturbations. [Copyright &y& Elsevier]

Abstract: A Banach space operator may be said to be “consistent in invertibility” provided that for each , TS and ST are either both or neither invertible. The induced spectrum contributes the conditions equivalent to various forms of “Weyl''s theorem”. [Copyright &y& Elsevier]

Abstract: In this note we define the property , a variant of Weyl''s theorem, and establish for a bounded linear operator defined on a Banach space the sufficient and necessary conditions for which property holds by means of the variant of the essential approximate point spectrum . In addition, the relation between property and hypercyclicity (or supercyclicity) is discussed. [Copyright &y& Elsevier]

Abstract: Proteins in brown rice (BR), white rice (WR) and rice bran (RB) were extracted from the same paddy rice and investigated for their components, functional properties and chemical characteristics by SDS-PAGE methodology. BR and WR proteins possessed a poor solubility under weak acid conditions due to a high content of glutenin and richness in higher molecular-weight (MW) protein fractions. Rice bran protein contained significantly lower molecular-weight components (MWs<50kDa) than those in WR and BR. Nitrogen solubility, foaming and emulsification properties of their rice protein preparations were affected not only by pH (3–11), but also by the concentrations of NaCl (0.4–2.0%) and sucrose (4.0–20.0%). All of them, particularly rice bran protein, had favorable functional properties in the medium with a high salt or sugar concentration. Therefore, they have a good potential for development in the food industry. [Copyright &y& Elsevier]

Abstract: An amphiphilic star block copolymer comprised of a hydrophobic PMMA block and a hydrophilic tri-arm poly(NIPAAm-co-DMAEMA) block was synthesized by copolymerization of NIPAAm and DMAEMA, with Ce4+ ions and tris(hydroxymethyl)methylamine as a redox initiatory system. The star copolymer undergoes self-assembly to the micellar nanoparticles with a core–shell structure and the thermo/pH dual-response, originated from the thermo-sensitivity of PNIPAAm and the pH-sensitivity of PDMAEMA. A fluorescence probe study showed the pH-dependent low CMCs (7.5 to 11.2 mg/L) of the micelles, confirming the formation of stable micelles. Morphological investigations showed that the blank and drug-loaded micelles both had spherical and uniform shapes. The sizes of the blank and drug-loaded nanoparticles were between 80 and 120 nm, depending on the given pH. The LCSTs of the star copolymer were determined to be 32 °C, 36.6 °C and 39.5 °C, corresponding to pH 5, pH 7.4 and pH 9, respectively, demonstrating a pH-dependent thermo-response. As a drug delivery, the micellar nanoparticles showed the dual-responsive release profiles in vitro, which were confirmed by the drug release studies. The obtained results showed the thermo-triggered accelerated release at pH 7.4, and the pH-triggered accelerated release at 37 °C, indicating the micelles nanoparticles would be a promising site-specific drug delivery for enhancing the accumulation of drug in targeting pathological areas. [Copyright &y& Elsevier]

Abstract: When and are given, we denote by the operator acting on the infinite dimensional separable Hilbert space of the form . In this paper, we prove that where , , , and denote the Browder spectrum, Browder essential approximate point spectrum, nullity, deficiency and conjugate of T, respectively. Some related results are obtained. [Copyright &y& Elsevier]

Abstract: A ratio-dependent Leslie system with feedback controls is studied. By using a comparison theorem and constructing a suitable Lyapunov function, some sufficient conditions for the existence of a unique almost periodic solution (periodic solution) and the global attractivity of the solutions are obtained. Examples show that the obtained criteria are new, general, and easily verifiable. [Copyright &y& Elsevier]

Abstract: Using a variant of the essential approximate point spectrum, we give the necessary and sufficient conditions for T for which the a-Browder''s theorem or the a-Weyl''s theorem holds. Also, the relation between hypercyclic operators (or supercyclic operators) and the operators which satisfy Weyl type theorem is discussed. [Copyright &y& Elsevier]

Abstract: Using the new spectrum set defined in this note, we give the necessary and sufficient condition for T which the Weyl''s theorem holds. We also consider how the Weyl''s theorem survives for analytically Class A operators. [Copyright &y& Elsevier]

Abstract: When and are given, we denote by the operator acting on the infinite dimensional separable Hilbert space of the form . In this paper, it is shown that a operator matrix is upper semi-Fredholm and for some if and only if A is upper semi-Fredholm and We also give the necessary and sufficient conditions for which is Weyl or is lower semi-Fredholm with nonnegative index for some . In addition, we explore how Weyl''s theorem, Browder''s theorem, a-Weyl''s theorem, and a-Browder''s theorem survive for upper triangular operator matrices on the Hilbert space. [Copyright &y& Elsevier]

Two variants of the Weyl spectrum are discussed. We find, for example, that if one of them coincides with the Browder spectrum then Weyl''s theorem holds, and conversely for isoloid operators. [Copyright &y& Elsevier]

Hydroxyapatite samples doped with different metal ions (HAP-M, M ​= ​Cu, Sr, Al, Ce, and Ti) were successfully prepared by a simple co-precipitation method for effective U(VI) uptake. The applications of HAP-M in capturing U(VI) were investigated. Besides, numerous characterizations were taken to study the chemical and physical properties of HAP-M. The critical factors affecting U(VI) adsorption were examined, such as pH, contact time, initial concentration of U(VI) and solution temperature. The present study revealed that the adsorption effect of HAP for U(VI) can be affected by doping metal cations with different ionic radii, and HAP doping with Ti4+ ions increased its adsorption selectivity to U(VI). With the increase of the molar ratio of doped Ti4+ ions (5%–20%), the adsorption selection of U(VI) on HAP-Ti is also gradually increasing. HAP-Ti is a potentially efficient adsorbent in removing U(VI) from radioactive solutions. Hydroxyapatite samples doped with different metal ions (HAP-M, M ​= ​Cu, Sr, Al, Ce, and Ti) were successfully prepared by a simple co-precipitation method for effective U(VI) uptake. The applications of HAP-M in capturing U(VI) were investigated. Besides, numerous characterizations were taken to study the chemical and physical properties of HAP-M. [Display omitted] • In this paper, we systematically investigated the effect of direct doping of cations with different ionic radii into HAP on its structure and physicochemical properties, and explored their effects on U(VI) adsorption. • The as-synthesized novel metal cation-doped hydroxyapatite (HAP-Ti) exhibited better adsorption selectivity for U(VI) than other prepared hydroxyapatites. [ABSTRACT FROM AUTHOR]

Abstract: We introduce the notion of operator-valued free Fisher information with respect to a positive map of a random variable in an operator-valued noncommutative probability space and point out its close relations to the modular frames arising from conditional expectations. Then we can apply this notion on the study of frame theory, especially on the disjointness problem of modular frames arising from conditional expectations. [Copyright &y& Elsevier]

A simple hydrothermal method was adopted to synthesize different inorganic-organic hybrid materials (Zr -x), including zirconium ethylenediamine tetramethylene phosphine (Zr-EDTMP), 2-phosphobutane-1,2,4-zirconium tricarboxylate (Zr-PBTC), odium creatine phosphate zirconium phosphate (Zr-CP), and creatinol zirconium phosphate (Zr–COP). Various characterizations were utilized to explore the physical and chemical properties of materials. The applications of Zr -x in removing U(Ⅵ) were studied comprehensively. The effects of solution's pH value, contact time, initial concentration of U(Ⅵ), and temperature on adsorption were examined. Besides, the desorption, reusability, as well as adsorptive selectivity were investigated. The present study revealed that the U(Ⅵ) adsorption on Zr-EDTMP was in accordance with Sips isothermal model with the greatest adsorption capacity (317.4 ​mg/g) and the superior adsorptive selectivity for U(Ⅵ). Zr-EDTMP is a potentially high-efficient adsorbent for extracting U(Ⅵ) from radioactive wastewater. A simple hydrothermal method was adopted to synthesize different Zr(IV) organophosphate hybrids Zr- x (including zirconium ethylenediamine tetramethylene phosphine (Zr-EDTMP), 2-phosphobutane-1,2,4-zirconium tricarboxylate (Zr-PBTC), odium creatine phosphate zirconium phosphate (Zr-CP), and creatinol zirconium phosphate (Zr–COP)). And, the Zr- x hybrids were applied in removal of U(VI). [Display omitted] ∙Four Zr(Ⅳ) organophosphate hybrids have been prepared by a hydrothemal method. ∙The adsorptive kinetics and isothems of Zr(Ⅳ) organophosphate hybrids were investigated. ∙Zr-EDTMP displayed superior adsorption capacity (317.43 ​mg/g) and selectivity. [ABSTRACT FROM AUTHOR]

Using photocatalysis to extract uranium from aqueous solution is a promising technique for the remediation of radioactive wastewater. This article reports the synthesis of hollow spherical g-C 3 N 4 (HCN) via a template method, and its subsequent modification by PEDOT:PSS (PTPS) to form a donor-acceptor (D-A) heterojunction photocatalyst (PTPS@HCN). The well-designed hollow structure and the incorporation of PTPS enhanced the visible light absorption, effectively driving the separation and transfer of photogenerated charge carriers. Moreover, the theoretical calculation reveals that the electronic excitation model of PTPS@HCN exhibits a distinct charge-transfer excitation characteristic. As a result, PTPS@HCN could efficiently remove 98.6 % of U(VI) after 90 min irradiation, which was 6.4 times higher than that of the pristine HCN. This study offers a new perspective for designing D-A organic photocatalysts for the photocatalytic separation of uranium. A hollow spherical type II heterostructure, x% PTPS@HCN (PEDOT:PSS@HCN), was successfully constructed. Compared to the original HCN, it has excellent photoelectric and photocatalytic properties, which the photocatalytic efficiency during the removal of U(VI) is 6.4 times that of pristine HCN. It has been experimentally confirmed that O 2 − plays important roles in the photocatalytic process. [Display omitted] • 1 % PTPS@HCN has the best photocatalytic performance, which could efficiently remove 98.6 % of U(VI) after 90 min irradiation. • Excellent anti-interference ability, stability and reusability. • The donor-acceptor (D-A) characteristics of the compound for charge transfer. • Photogenerated electrons and superoxide radicals.•O2− plays the dominant role in reducing U(VI) to (UO 2)O 2 ·2H 2 O. [ABSTRACT FROM AUTHOR]

Eicosapentaenoic acid (EPA), a well-known dietary n −3 PUFAS, has been considered to inhibit proliferation of tumor cells. However, the molecular mechanism related to EPA-induced liver cancer cells apoptosis has not been reported. In this study, we investigated the effect of EPA on HepG2 cells proliferation and apoptosis mechanism through mitochondrial pathways. EPA inhibited proliferation of HepG2 cells in a dose-dependent manner and had no significant effect on the cell viability of humor normal liver L-02 cells. It was found that EPA initially evoked ROS formation, leading to [Ca 2+ ] c accumulation and the mitochondrial permeability transition pore (MPTP) opening; EPA-induced HepG2 cells apoptosis was inhibited by N-acetylcysteine (NAC, an inhibitor of ROS), 1,2-bis (2-aminophenoxy) ethane-N,N,N′,N′-tetraacetic acid (BAPTA-AM, a chelator of calcium) and CsA (inhibitor of MPTP). The relationship between ROS production, the increase of cytoplasmic Ca and MPTP opening was detected. It seems that ROS may act as an upstream regulator of EPA-induced [Ca 2+ ] c generation, moreover, generation of ROS, overload of mitochondrial [Ca 2+ ] c , and JNK activated cause the opening of MPTP. Western blotting results showed that EPA elevated the phosphorylation status of JNK, processes associated with the ROS generation. Simultaneously, the apoptosis induced by EPA was related to release of cytochrome C from mitochondria to cytoplasm through the MPTP and activation of caspase-9 and caspase-3. These results suggest that EPA induces apoptosis through ROS–Ca 2+ –JNK mitochondrial pathways. [ABSTRACT FROM AUTHOR]

Autosomal dominant polycystic kidney disease (ADPKD) is caused by mutations in the PKD1 or PKD2 gene, but cellular mechanisms of cystogenesis remain unclear. In an attempt to display the array of cyst-specific molecules and to elucidate the disease pathway, we have performed comprehensive high-throughput expression analysis of normal and ADPKD epithelia in a two-step fashion. First, we generated expression profiles of normal and cystic epithelia derived from kidney and liver using serial analysis of gene expression (SAGE). We found 472 and 499 differentially expressed genes with fivefold difference in liver and kidney libraries, respectively. These genes encode growth factors, transcription factors, proteases, apoptotic factors, molecules involved in cell–extracellular matrix interactions, and ion channels. As a second step, we constructed a custom cDNA microarray using a subset of the differentially regulated genes identified by SAGE and interrogated ADPKD patient samples. Subsequently, a set of differentially expressed genes was refined to 26 up-regulated and 48 down-regulated genes with a p value of <0.01. This study may provide valuable insights into the pathophysiology of ADPKD and suggest potential therapeutic targets. [Copyright &y& Elsevier]

In this study, a 10%Fe-ZIF-8-300-PO 4 adsorbent was synthesized and its adsorption performance for U(VI) was investigated comprehensively. It was found that after a series of operations such as Fe doping, thermal activation and phosphorylation, the adsorption performance for U(VI) can be significantly improved on the basis of maintaining the skeleton characteristics of ZIF-8. The results showed that the optimal Fe-doping amount and thermal activation temperature was 10% and 300°C, respectively. The adsorption of U(VI) on 10%Fe-ZIF-8-300-PO 4 reached equilibrium within 60 ​min, and conformed to pseudo-second-order kinetic equation. Furthermore, a maximum saturated adsorption capacity of 691.83 ​mg/g was achieved. The above results demonstrated that 10%Fe-ZIF-8-300-PO 4 may be used to efficiently remove U(VI) from uranium-containing radioactive waste water. The 10%Fe-ZIF-8-300-PO 4 showed good adsorption performance for U(VI). After the thermal activation process, the Fe(II) active site was exposed, and the part of U(VI) was converted to U(IV) by redox reaction while the U(VI) was absorbed. Phosphate group can complexe with UO 2 2+, which increased the adsorption capacity and selectivity of the 10%Fe-ZIF-8-300-PO 4 by some extent. [Display omitted] • A new adsorbent was obtained by Fe doping, thermal activation and phosphorylation. • Their synergistic effects obviously improve the adsorption performance for U(VI). • 10%Fe-ZIF-8-PO 4 -300 has a higher adsorption capacity and faster adsorption rate. • Redox reaction and complexation constitute the main adsorption mechanism. [ABSTRACT FROM AUTHOR]

The separation of uranium U(VI) through photoreduction approach has attracted substantial attention. Sulfide-based materials have revealed excellent performance for reducing U(VI) and there is no record of CuS based materials. Herein, we synthesized CuS/TNTAs heterostructured nanocomposites (CUTN) with varied CuS contents via successive ionic layer adsorption and reaction (SILAR) method. After SILAR deposition for 10 times, CUTN-10 showed the best photocatalytic performance, and 92.6 ​% of U(VI) can be removed within 180 ​min. The CuS could provide sufficient photoelectrons and TNTAs can transport these photoelectrons to the adsorbed U(VI) on its surface, the reduced uranium sediment was proved to be (UO 2) O 2 ·2H 2 O. More important, the combination of TNTAs could effective inhibit photocorrosion of CuS and the leaching of Cu2+ was relatively low. We also unconsciously found that CUTN-10 can photoreduce U(VI) without any sacrificial agent which caused by the oxidation of S2−. This work expands the application of sulfide-based materials and provides basic data for bracing the expansion of sulfide-based materials in the field of U(VI) photoreduction. The CUTN-10 exhibited excellent photocatalytic reduction activity for U(VI) in the air atmosphere. The light absorption region could be expanded, and the recombination of charges could be effectively suppressed by combining with CuS. In addition, methanol and S2− consumed holes to separate photogenerated electron-hole pairs, the reduction products were confirmed as (UO 2) O 2 ·2H 2 O species, which activated by both photoinduced electrons and •O 2 − radicals. [Display omitted] ● CUN-10 exhibited excellent photocatalytic reduction activity for U(VI). ● TNTAs can effectively inhibit the photocorrosion of CuS. ● CUN-10 could photoreduce U(VI) without adding sacrificial agent. ● The photo-reduced sediments were confirmed to (UO 2) O 2 ·2H 2 O species. [ABSTRACT FROM AUTHOR]

The photocatalytic is a safe, efficient, and environmentally friendly technology for uranium (VI) removal. In this study, MoS 2 and P doped g-C 3 N 4 nanocomposites (MPCN) were obtained by ultrasonic chemical method, and further characterized by XRD, SEM, TEM, XPS and several photoelectrochemical techniques. The introduction of MoS 2 and incorporation of P atoms could increase visible light absorption and accelerate the interfacial charge transfer of MPCN. The MPCN containing 3% MoS 2 (3% MPCN) exhibited the highest photocatalytic performance, resulting in a reduction rate of 0.1265 ​min−1, which is 5.6 times higher than that of pure g-C 3 N 4. Furthermore, the reduction of U(VI) was activated by both photoinduced electrons and •O 2 - radicals, and the reduction products was confirmed as (UO 2) O 2 ·2H 2 O species. This element doped heterojunction photocatalyst and the mechanism of uranium photoreduction under air condition may bring new insight for radionuclides treatment. The 3% MPCN exhibited excellent photocatalytic reduction activity for U(VI) in the air atmosphere. The light absorption region could be expanded, and the recombination of charges could be effectively suppressed by doping element P and combining with MoS 2. In addition, the reduction products were confirmed as (UO 2) O 2 ·2H 2 O species, which activated by both photoinduced electrons and •O 2 - radicals. [Display omitted] • MPCN was modified by element doping and heterostructure constructing. • Both P element doping and MoS 2 constructing could alter the electronic property of g-C 3 N 4. • MPCN could highly reduce U(VI) under background electrolytes. • The photo-reduced sediments were confirmed to (UO 2) O 2 ·2H 2 O species. [ABSTRACT FROM AUTHOR]

Heterostructured CdS/TiO 2 nanotube arrays composites (CdS/TNTAs) were synthesized by the successive ionic layer adsorption (SILAR) reaction with vacuum freeze-drying-assisted method. The CdS nanoparticles were anchored on the inner wall of the anodic TNTAs via strong electronic interaction rather than occupied the nanotubes. The CdS/TNTAs-10 with 27.28 ​wt% CdS exhibited shows the best photocatalytic activity for reduction of U(VI) (97% at 240 ​min) and the photocatalytic activity was still 83.6% after 5 cycles. These improvements probably stem from the porous tubular structure of TNTAs acts as the protective shell which can effectively inhibit the photocorrosion of CdS and promote the photoinduced interfacial electron-hole pairs separation. Furthermore, the possible the photocatalytic electron transfer path was proposed, and the photogenerated electrons (e-) and the superoxide radicals (·O 2 -) were the predominant active free radicals. This work highlighted a simple synthesis of CdS/TNTAs heterojunction with potential application in radioactive wastewater remediation. The CdS/TNTAs-10 exhibited excellent photocatalytic reduction activity for U(VI) was attributed to remarkably increase the separation efficiency of electron-hole pairs and electron transport capacity. In addition, the U(VI) and methanol acted as sacrificial agent of e− and h+, respectively. [Display omitted] • Heterostructured CdS/TiO 2 nanotube arrays composites were successfully synthesized. • The CdS nanoparticles were only anchored on the inner wall of TNTAs instead of blocking the tubes. • TNTAs shell can effectively prevent photocorrosion of CdS. • CdS/TNTAs exhibited excellent photocatalytic reduction activity towards U(VI). [ABSTRACT FROM AUTHOR]

Synthesizing highly efficient adsorbent materials to remove U(VI) from contaminated water remains a major challenge. Here, using UiO66-NH 2 as a sacrificial template, porous carbons (ZrO 2 @PCs) were prepared by high-temperature calcination, and then a simple strategy was used for phosphorylation modification to prepare the target product ZrO 2 @PCs-PO 4. The microscopic surface morphology and structure of ZrO 2 @PCs-PO 4 characterized by SEM, FT-IR and XRD reveals that phosphate groups has been successful introduced on the surface of ZrO2@PCs-PO 4. Batch experimentation showed that the phosphorylation process improves the adsorption behaviors, and the maximum monolayer adsorption capacity for U(VI) is 496.5 ​mg/g. The adsorption isotherms and kinetics were simulated to explore its adsorption mechanism. The excellent selectivity and reusability ensure this material could apply in selective removal of U(VI) ions. MOF-derived phosphorylated porous carbons (ZrO 2 @PCs-PO 4) were obtained by a simple method. ZrO 2 @PCs-PO 4 shows a higher adsorption capacity (496.5 ​mg/g) and a faster adsorption rate (<30 ​min) for U(VI) in aqueous solution. The results show that ZrO 2 @PCs-PO 4 can be used as a potential adsorbent for the recovery of U(VI) ions in radioactive wastewater. Image 1 • MOF-derived porous carbons were obtained by calcination and phosphorylation. • ZrO 2 @PCs-PO 4 has higher adsorption capacity and faster adsorption rate for U(VI). • Phosphate groups played an important role in the high adsorption performance. • Main removal mechanism included electrostatic attraction and surface complexation. [ABSTRACT FROM AUTHOR]