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Chong Chen, Nengjie Feng, Qirui Guo, Zhong Li, Xue Li, Jing Ding, Lei Wang, Hui Wan, Guofeng Guan
A novel hybrid material constituted of MIL-101(Cr) and mesoporous silica was successfully assembled through an in-situ hydrothermal method. The MCM-41 with well-ordered mesopores acted as the structure-directing agent, which regulated the growth of MIL-101(Cr) crystals along a certain direction and restricted the expansion of framework. Meanwhile, the hydroxyl groups existed in MCM-41 preferentially coordinated with the Cr3+ centers in MOF, followed by the layer-packed arrangement of MIL-101(Cr) nanocrystals on the surface of matrix...
December 5, 2017: Journal of Colloid and Interface Science
T M Koutsos, T Chatzistathis, E I Balampekou
The disposal of olive mill wastewater (OMW) is a serious environmental issue for the Mediterranean countries. However, there is still no common European legislation on the management and the re-use of OMW in agriculture, in the frame of sustainable crop management and the standards for the safe OMW disposal and re-use are left to be set by each EU country, individually. This review paper presents the most effective and sustainable practices for OMW, (treatment, application and management), which can maximize the benefits of OMW on crops and soils, while minimizing the potential hazards for public health, thus promoting environmental sustainability...
December 8, 2017: Science of the Total Environment
Helge Reinsch, Thomas Homburg, Niclas Heidenreich, Dominik Froehlich, Stefan Henninger, Michael Wark, Norbert Stock
A new aluminium MOF based on the short aliphatic linker molecule mesaconic acid (H2Mes; methylfumaric acid) is reported. Al-MIL-68-Mes with composition [Al(OH)(O2C-C3H4-CO2)]·nH2O is obtained after short reaction times of 45 minutes under mild, aqueous synthesis conditions (95 °C). It exhibits a kagome-like framework structure with large hexagonal and small trigonal channels (diameters of ~ 6 and ~2 Å, respectively) and a specific surface area of SBET ≈ 1040 m2/g (VMIC = 0.42 cm3/g). A sigmoidal vapour sorption isotherm for water and uptakes of water and methanol above 30 wt% were observed...
December 11, 2017: Chemistry: a European Journal
Yan-Feng Huang, Qiao-Huan Liu, Kang Li, Ying Li, Na Chang
We adopted a facile hydrofluoric acid-free hydro-/solvothermal method for the preparation of four magnetic iron(III)-based framework composites (MIL-101@Fe3 O4 -COOH, MIL-101-NH2 @Fe3 O4 -COOH, MIL-53@Fe3 O4 -COOH and MIL-53-NH2 @Fe3 O4 -COOH). The obtained four magnetic iron(III)-based framework composites were applied to magnetic separation and enrichment of the fungicides (prochloraz, myclobutanil, tebuconazole and iprodione) from environmental samples before high-performance liquid chromatographic analysis...
December 11, 2017: Journal of Separation Science
Luca Aldrighetti, Francesca Ratti, Umberto Cillo, Alessandro Ferrero, Giuseppe Maria Ettorre, Alfredo Guglielmi, Felice Giuliante, Fulvio Calise
A technical error led to incorrect rendering of the author group in this article. The correct authorship is as follows.
December 11, 2017: Updates in Surgery
Yang An, Benyan Xu, Yuanyuan Liu, Zeyan Wang, Peng Wang, Ying Dai, Xiaoyan Qin, Xiaoyang Zhang, Baibiao Huang
Photocatalytic overall water splitting is realized by taking advantage of the semiconductive and porous properties of MIL-125(Ti). CoPi and Pt are deposited into MIL-125(Ti) in two steps. The co-catalysts CoPi and Pt not only act as reactive sites for oxygen and hydrogen evolution, respectively, but also improve the photogenerated charge separation efficiency. The above conclusions are supported by the photoelectrical and photophysical results.
December 2017: ChemistryOpen
S Senthilkumar, Minaxi S Maru, R S Somani, H C Bajaj, Subhadip Neogi
Amine-functionalised framework NH2-MIL-101(Al) was synthesized using a solvothermal and microwave method and characterized by PXRD, FT-IR, TGA, SEM-EDX, and BET surface area analysis. The desolvated framework, in the presence of co-catalyst tetrabutylammonium bromide (TBAB), acted as an excellent heterogeneous catalyst for the solvent-free cycloaddition of carbon dioxide (CO2) with epoxides, affording five-membered cyclic carbonates. Using styrene oxide, the NH2-MIL-101(Al)/TBAB system showed more than 99% conversion, affording 96% yield and 99% selectivity with a turn over frequency of 23...
December 8, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Shuai Luo, Jianlong Wang
The metal-organic frameworks (MOFs) MIL-100(Fe) and graphene oxide (GO) composites were prepared by hydrothermal method and characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption, thermal-gravimetric (TG) analysis, the Fourier Transform Infrared Spectroscopy (FTIR), and scanning electron microscopy (SEM). The composites were used for the adsorption of methylene blue (MB) and methyl orange (MO) in aqueous solution. The results indicated that MIL-100(Fe) and GO formed a sandwich-like structure, and the crystal structure of MIL-100(Fe) was reserved in the composites...
December 7, 2017: Environmental Science and Pollution Research International
M Levcikova, J Breza, J Luha, J Dubravicky, E Kovacova, J Fillo
INTRODUCTION: TRT in men with testosterone deficiency syndrome (TDS) had multiple positive effects and restore a quality of life of affected men. Polyglobulia is the most common dose-limiting adverse effect of TRT, but the mechanisms of TRT-mediated erythropoesis remain unclear. In this study, we evaluated long term haematological side effects of TRT: polyglobulia, elevated hemoglobin (Hb) and haematocrit (Ht). METHODS: In a cross-sectional descriptive study, the authors treated 69 men with TDS and the average age 59 years and the follow-up period 81...
2017: Bratislavské Lekárske Listy
Jinlin Yang, Zhicheng Ju, Yong Jiang, Zheng Xing, Baojuan Xi, Jinkui Feng, Shenglin Xiong
The intercalation of potassium ions into graphite is demonstrated to be feasible, while the electrochemical performance of potassium-ion batteries (KIBs) remains unsatisfying. More effort is needed to improve the specific capacity while maintaining a superior rate capability. As an attempt, nitrogen/oxygen dual-doped hierarchical porous hard carbon (NOHPHC) is introduced as the anode in KIBs by carbonizing and acidizing the NH2 -MIL-101(Al) precursor. Specifically, the NOHPHC electrode delivers high reversible capacities of 365 and 118 mA h g-1 at 25 and 3000 mA g-1 , respectively...
December 7, 2017: Advanced Materials
Sunitha R Pangala, Alex Enrich-Prast, Luana S Basso, Roberta Bittencourt Peixoto, David Bastviken, Edward R C Hornibrook, Luciana V Gatti, Humberto Ribeiro, Luana Silva Braucks Calazans, Cassia Mônica Sakuragui, Wanderley Rodrigues Bastos, Olaf Malm, Emanuel Gloor, John Bharat Miller, Vincent Gauci
Wetlands are the largest global source of atmospheric methane (CH4), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH4 in the tropics, consistently underestimate the atmospheric burden of CH4 determined via remote sensing and inversion modelling, pointing to a major gap in our understanding of the contribution of these ecosystems to CH4 emissions. Here we report CH4 fluxes from the stems of 2,357 individual Amazonian floodplain trees from 13 locations across the central Amazon basin...
December 4, 2017: Nature
Pengfei Ji, Yang Song, Tasha Drake, Samuel S Veroneau, Zekai Lin, Xiandao Pan, Wenbin Lin
Titania (TiO2) is widely used in the chemical industry as an efficacious catalyst support, benefiting from its unique strong metal-support interaction. Many proposals have been made to rationalize this effect at the macroscopic level, yet the under-lying molecular mechanism is not understood due to the presence of multiple catalytic species on TiO2 surface. This chal-lenge can be addressed with metal-organic frameworks featuring well-defined metal oxo/hydroxo clusters for supporting single-site catalysts. Herein we report that the Ti8(μ2-O)8(μ2-OH)4 node of the Ti-BDC MOF (MIL-125) provides a single-site model of the classical TiO2 support to enable CoII-hydride catalyzed arene hydrogenation...
December 6, 2017: Journal of the American Chemical Society
Adam H Metherel, Raphaël Chouinard-Watkins, Marc-Olivier Trépanier, R J Scott Lacombe, Richard P Bazinet
Dietary docosahexaenoic acid (DHA, 22:6n-3) not only increases blood and tissue levels of DHA, but also eicosapentaenoic acid (EPA, 20:5n-3). It is generally believed that this increase is due to DHA retroconversion to EPA, however, a slower conversion of α-linolenic acid (ALA, 18:3n-3) derived EPA to downstream metabolic products (i.e. slower turnover of EPA) is equally plausible. In this study, 21-day old Long Evans rats were weaned onto an ALA only or DHA + ALA diet for 12 weeks. Afterwards, livers were collected and the natural abundance 13C-enrichment was determined by compound specific isotope analysis (CSIA) of liver EPA by isotope ratio mass-spectrometry and compared to dietary ALA and DHA 13C-enrichment...
2017: Nutrition & Metabolism
Matthew W Logan, Jeremy D Adamson, Duy Le, Fernando Uribe-Romo
We demonstrate that the highly photoredox active metal-organic framework MIL-125-NHCyp exhibits crystalline and porosity stability to humid environments for more than 30 days, as well as increased hydrophobicity compared to the unfunctionalized framework. This improved stability, in synergy with its high photocatalytic activity, makes this MOF a very promising candidate for large-scale application in CO2 photoreduction.
December 1, 2017: ACS Applied Materials & Interfaces
Pedro Brito, Ricardo Prego, Mário Mil-Homens, Isabel Caçador, Miguel Caetano
The distribution and sources of yttrium and rare-earth elements (YREE) in surface sediments were studied on 78 samples collected in the Tagus estuary (SW Portugal, SW Europe). Yttrium and total REE contents ranged from 2.4 to 32mg·kg-1 and 18 to 210mg·kg-1, respectively, and exhibited significant correlations with sediment grain-size, Al, Fe, Mg and Mn, suggesting a preferential association to fine-grained material (e.g. aluminosilicates but also Al hydroxides and Fe oxyhydroxides). The PAAS (Post-Archean Australian Shale) normalized patterns display three distinct YREE fractionation pattern groups along the Tagus estuary: a first group, characterized by medium to coarse-grained material, a depleted and almost flat PAAS-normalized pattern, with a positive anomaly of Eu, representing one of the lithogenic components; a second group, characterized mainly by fine-grained sediment, with higher shale-normalized ratios and an enrichment of LREE relative to HREE, associated with waste water treatment plant (WWTP) outfalls, located in the northern margin; and, a third group, of fine-grained material, marked by a significant enrichment of Y, a depletion of Ce and an enrichment of HREE over LREE, located near an inactive chemical-industrial complex (e...
November 27, 2017: Science of the Total Environment
Daniela Romão, Mafalda Cavalheiro, Dalila Mil-Homens, Rui Santos, Pedro Pais, Catarina Costa, Azusa Takahashi-Nakaguchi, Arsénio M Fialho, Hiroji Chibana, Miguel C Teixeira
Persistence and virulence of Candida glabrata infections are multifactorial phenomena, whose understanding is crucial to design more suitable therapeutic strategies. In this study, the putative multidrug transporter CgDtr1, encoded by ORF CAGL0M06281g, is identified as a determinant of C. glabrata virulence in the infection model Galleria mellonella. CgDTR1 deletion is shown to decrease the ability to kill G. mellonella larvae by decreasing C. glabrata ability to proliferate in G. mellonella hemolymph, and to tolerate the action of hemocytes...
2017: Frontiers in Cellular and Infection Microbiology
Yu-Te Liao, Yu-Yuan Huang, Hao Ming Chen, Kenji Komaguchi, Chia-Hung Hou, Joel Henzie, Yusuke Yamauchi, Yusuke Ide, Kevin C-W Wu
Mixed metal oxide nanoparticles have interesting physical and chemical properties, but synthesizing them with colloidal methods is still challenging and often results in very heterogeneous structures. Here we describe a simple method to synthesize mesoporous titania nanoparticles implanted with a uniform distribution of copper oxide nanocrystals (CuO@MTs). By calcining a titanium-based metal-organic framework (MIL-125) in the presence of Cu ions we can trap the Cu in the TiO2 matrix. Removal of the organic ligand creates mesoporosity and limits phase separation so that tiny CuO nanocrystals form in the interstices of the TiO2...
November 28, 2017: ACS Applied Materials & Interfaces
Pascal Freund, Irena Senkovska, Stefan Kaskel
Switchable MOFs showing pronounced and step-wise volume changes as a response towards external stimuli such as partial pressure changes are integrated into electron conductive composites to generate novel threshold sensors with pronounced resistivity changes when approaching a critical partial pressure. Two "gate pressure" MOFs (DUT-8(Ni), ELM-11: DUT = Dresden University of Technology, ELM = Elastic Layer-structured MOF) and one "breathing" MOF (MIL-53(Al): MIL = Material Institute Lavoisier) are shown to cover a wide range of detectable gas concentrations ( 20-80 %) using this concept...
November 28, 2017: ACS Applied Materials & Interfaces
Xue-Ping Gao, Yang Zhou, Xin-Chun Zheng, Xuan Yi, Li-Bo Tang, Jin-Lin Hou, Yong-Yin Li
OBJECTIVE: To investigate the effect of an adenovirus vector containing murine interleukin-21 gene (Ad-GFP-mIL-21) in virus clearance and on the production of HBV-specific antibodies in mice with persistent HBV infection. METHODS: ELISA and Western blot analysis were used to detect the expression of mIL-21 in the supernatant and cytoplasm of cultured HepG2.2.15 cells after infection by Ad-GFP-mIL-21. Mouse models of chronic HBV infection established by in vivo transduction with rAAV8-1...
November 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
Jin Yeong Kim, Linda Zhang, Rafael Balderas-Xicohtencatl, Jaewoo Park, Michael Hirscher, Hoi Ri Moon, Hyunchul Oh
Breathing of MIL-53(Al), a flexible metal-organic framework (MOF), leads to dynamic changes as narrow pore (np) transition to large pore (lp). During the flexible and reversible transition, the pore apertures are continuously adjusted, thus providing the tremendous opportunity to separate mixtures of similar-sized- and similar-shaped molecules that require precise pore tuning. Herein, for the first time, we report a strategy for effectively separating hydrogen isotopes through the dynamic pore change during the breathing of MIL-53(Al), representative of flexible MOF...
November 27, 2017: Journal of the American Chemical Society
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