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https://www.readbyqxmd.com/read/28527298/enhanced-adsorption-performance-of-mos2-nanosheet-coated-mil-101-hybrids-for-the-removal-of-aqueous-rhodamine-b
#1
Cao Yang, Jianhua Cheng, Yuancai Chen, Yongyou Hu
A MoS2 nanosheet-coated chromium terephthalate MIL-101 octahedron hybrid (denoted as MoS2/MIL-101) was prepared via a simple hydrothermal reaction. The obtained MoS2/MIL-101 hybrid exhibited a significantly enhanced adsorption ability toward rhodamine B (RhB) as compared with pure MoS2, MIL-101, and the physical mixture of the two. The results demonstrate that the MoS2/MIL-101 hybrid had a high uptake capacity (Qm ≈ 344.8mgg(-1)) and fast adsorption rate for the removal of aqueous RhB. The excellent adsorption performance is likely related to the synergism of hydrogen bonding, π-π stacking interactions, and direct coordination between the MIL-101 substrate and RhB, as well as electrostatic interactions between MoS2 nanosheets and RhB...
May 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28513762/water-fluoridation-in-brazilian-cities-at-the-first-decade-of-the-21st-century
#2
Paulo Frazão, Paulo Capel Narvai
OBJECTIVE: To assess the coverage of the fluoridation of the public water supply in Brazilian municipalities at the first decade of the 21st century, according to population size and municipal human development index (MHDI). METHODS: We have used data produced by national information agencies and the United Nations Development Programme. Population size was separated into < 10,000, 10,000-50,000, and > 50,000 inhabitants. The MHDI was classified into < 0...
May 15, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28499376/benefits-of-preparing-for-childbirth-with-mindfulness-training-a-randomized-controlled-trial-with-active-comparison
#3
Larissa G Duncan, Michael A Cohn, Maria T Chao, Joseph G Cook, Jane Riccobono, Nancy Bardacke
BACKGROUND: Childbirth fear is linked with lower labor pain tolerance and worse postpartum adjustment. Empirically validated childbirth preparation options are lacking for pregnant women facing this problem. Mindfulness approaches, now widely disseminated, can alleviate symptoms of both chronic and acute pain and improve psychological adjustment, suggesting potential benefit when applied to childbirth education. METHODS: This study, the Prenatal Education About Reducing Labor Stress (PEARLS) study, is a randomized controlled trial (RCT; n = 30) of a short, time-intensive, 2...
May 12, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28497824/photochemical-synthesis-of-cds-mil-125-ti-with-enhanced-visible-light-photocatalytic-performance-for-the-selective-oxidation-of-benzyl-alcohol-to-benzaldehyde
#4
Rui Zhang, Gang Li, Yue Zhang
In this study, we decorated CdS on the surface of MIL-125(Ti) using a photochemical method to prepare the CdS-MIL-125(Ti) nanocomposites. The obtained samples were characterized by a series of techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra, electrochemical measurements and UV-Vis diffuse reflectance spectra (DRS). The results show that the CdS nanoparticles were highly dispersed on surface of MIL-125(Ti). The combination will promote the separation of electron-hole pairs and increase the dispersity of CdS...
May 12, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28485957/carbamoylmethylphosphine-oxide-functionalized-mil-101-cr-as-highly-selective-uranium-adsorbent
#5
Jeroen De Decker, Julie Rochette, Jeriffa De Clercq, Justyna Florek, Pascal Van Der Voort
The carbamoylmethylphosphine oxide (CMPO) functionalized MIL-101(Cr) was investigated as a potential uranium scavenger. This metal-organic framework-based adsorbent shows very high selectivity toward uranium, as well as thorium, in competition with various rare earth metals. Furthermore, it showed rapid adsorption kinetics, in both batch conditions and a dynamic (column) setup. The adsorbent is fully regenerable, using oxalate solution. Fast elution kinetics in the column setup were observed during the regeneration...
May 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28481003/mof-templated-synthesis-of-ultrasmall-photoluminescent-carbon-nanodot-arrays-for-optical-applications
#6
Zhi-Gang Gu, De-Jing Li, Chan Zheng, Yao Kang, Christof Wöll, Jian Zhang
Arrays of ultrasmall and uniform carbon nanodots (CDs) are of pronounced interest for applications in optical devices. Herein, we describe a low-temperature calcination approach with rather inexpensive reactants. After glucose molecules had been loaded into the pores of metal-organic frameworks (MOFs), well-defined CD arrays were produced by heating to 200 °C. The size and spacing of the CDs could be controlled by the choice of templating MOF: HKUST-1, ZIF-8, or MIL-101. The sizes of the obtained CDs were approximately 1...
May 8, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28480581/automatic-quantification-of-bone-marrow-edema-on-mri-of-the-wrist-in-patients-with-early-arthritis-a-feasibility-study
#7
Evgeni Aizenberg, Edgar A H Roex, Wouter P Nieuwenhuis, Lukas Mangnus, Annette H M van der Helm-van Mil, Monique Reijnierse, Johan L Bloem, Boudewijn P F Lelieveldt, Berend C Stoel
PURPOSE: To investigate the feasibility of automatic quantification of bone marrow edema (BME) on MRI of the wrist in patients with early arthritis. METHODS: For 485 early arthritis patients (clinically confirmed arthritis of one or more joints, symptoms for less than 2 years), MR scans of the wrist were processed in three automatic stages. First, super-resolution reconstruction was applied to fuse coronal and axial scans into a single high-resolution 3D image. Next, the carpal bones were located and delineated using atlas-based segmentation...
May 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28466636/a-versatile-molecular-silver-ink-platform-for-printed-flexible-electronics
#8
Arnold Jason Kell, Chantal Paquet, Olga Mozenson, Iden Djavani-Tabrizi, Bhavana Deore, Xiangyang Liu, Gregory P Lopinski, Robert James, Khelifa Hettak, Jafar Shaker, Adrian Momciu, Julie Ferrigno, Olivier Ferrand, Jianxiong Hu, Sylvie Lafreniere, Patrick R L Malenfant
A silver molecular ink platform formulated for screen, inkjet and aerosol printing is presented. A simple formulation comprising silver neodecanoate, ethyl cellulose and solvent provides improved performance vs established inks yet with improved economics. Thin, screen printed traces with exceptional electrical (< 10 mΩ/□/mil or 12 μΩ·cm)) and mechanical properties are achieved following thermal or photonic sintering, the latter having never been demonstrated for silver salt based inks. Low surface roughness, sub-micron thicknesses and linewidths as narrow as 41 μm outperform commercial ink benchmarks based on flakes or nanoparticles...
May 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28466296/t-independent-response-mediated-by-oncolytic-tanapoxvirus-recombinants-expressing-interleukin-2-and-monocyte-chemoattractant-protein-1-suppresses-human-triple-negative-breast-tumors
#9
Yogesh R Suryawanashi, Tiantian Zhang, Helene M Woyczesczyk, John Christie, Emily Byers, Steven Kohler, Robert Eversole, Charles Mackenzie, Karim Essani
Human triple negative breast cancer (TNBC) is an aggressive disease, associated with a high rate of recurrence and metastasis. Current therapeutics for TNBC are limited, highly toxic and show inconsistent efficacy due to a high degree of intra-tumoral and inter-tumoral heterogeneity. Oncolytic viruses (OVs) are an emerging treatment option for cancers. Several OVs are currently under investigation in preclinical and clinical settings. Here, we examine the oncolytic potential of two tanapoxvirus (TPV) recombinants expressing mouse monocyte chemoattractant protein (mMCP)-1 [also known as mCCL2] and mouse interleukin (mIL)-2, in human TNBC, in vitro and in vivo...
June 2017: Medical Oncology
https://www.readbyqxmd.com/read/28460018/evaluation-of-the-diagnostic-accuracy-of-hand-and-foot-mri-for-early-rheumatoid-arthritis
#10
Wouter P Nieuwenhuis, Hanna W van Steenbergen, Lukas Mangnus, Elize C Newsum, Johan L Bloem, Tom W J Huizinga, Saskia le Cessie, Monique Reijnierse, Annette H M van der Helm-van Mil
Objectives.: To assess the diagnostic value of MRI for early RA. In some RA patients, a classifiable diagnosis cannot be made at first presentation; these patients present with unclassified arthritis (UA). The use of MRI for early diagnosis of RA is recommended, yet the evidence for its reliability is limited. Methods.: MRI of hand and foot was performed in 589 early arthritis patients included in the Leiden Early Arthritis Clinic (229 presented with RA, 159 with other arthritides and 201 with UA)...
April 27, 2017: Rheumatology
https://www.readbyqxmd.com/read/28448879/adsorption-of-organic-arsenic-acids-from-water-over-functionalized-metal-organic-frameworks
#11
Mithun Sarker, Ji Yoon Song, Sung Hwa Jhung
Organic arsenic acids (OAAs) are regarded as water pollutants because of their toxicity and considerable solubility in water. Adsorption of OAAs such as phenylarsonic acid (PAA) and p-arsanilic acid (ASA) from water was investigated over functionalized (with OH groups) metal-organic framework (MOF, MIL-101), as well as over pristine MIL-101 and commercial activated carbon. The highly porous MIL-101 bearing three hydroxyl groups (MIL-101(OH)3) exhibited remarkable PAA and ASA adsorption capacities. Based on the effects of pH on PAA and ASA adsorption, hydrogen bonding was suggested as a plausible mechanism of OAA adsorption...
April 19, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28443865/simultaneous-use-of-mofs-mil-101-cr-and-zif-11-in-thin-film-nanocomposite-membranes-for-organic-solvent-nanofiltration
#12
Carlos Echaide-Górriz, Marta Navarro, Carlos Téllez, Joaquín Coronas
The MOFs Cr carboxylate MIL-101(Cr) and Zn imidazolate ZIF-11 have different chemical and textural properties. These properties have been combined to prepare thin film nanocomposite (TFN) membranes for organic solvent nanofiltration (OSN) with the two MOFs simultaneously embedded in the same membrane. The TFN membrane containing only ZIF-11 permeated faster than that with only MIL-101(Cr) when filtering sunset yellow (SY) (4.9 L m(-2) h(-1) bar(-1)) and acridine orange (AO) (3.2 L m(-2) h(-1) bar(-1)), although MIL-101(Cr) alone gave rise in both cases to better rejections (above 90%)...
May 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28440621/gas-phase-sensing-of-alcohols-by-metal-organic-framework-polymer-composite-materials
#13
Sumit Sachdeva, Sander J H Koper, Anahid Sabetghadam, Dimitri Soccol, Dirk J Gravesteijn, Freek Kapteijn, Ernst J R Sudhölter, Jorge Gascon, Louis C P M de Smet
Affinity layers play a crucial role in chemical sensors for the selective and sensitive detection of analytes. Here, we report the use of composite affinity layers containing Metal Organic Frameworks (MOFs) in a polymeric matrix for sensing purposes. Nanoparticles of NH2-MIL-53(Al) were dispersed in a Matrimid polymer matrix with different weight ratios (0-100 wt %) and drop-casted on planar capacitive transducer devices. These coated devices were electrically analyzed using impedance spectroscopy and investigated for their sensing properties toward the detection of a series of alcohols and water in the gas phase...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28437639/a-novel-biosensor-based-on-boronic-acid-functionalized-metal-organic-frameworks-for-the-determination-of-hydrogen-peroxide-released-from-living-cells
#14
Hongxia Dai, Wenjuan Lü, Xianwei Zuo, Qian Zhu, Congjie Pan, Xiaoying Niu, Juanjuan Liu, HongLi Chen, Xingguo Chen
In this work, we report a durable and sensitive H2O2 biosensor based on boronic acid functionalized metal-organic frameworks (denoted as MIL-100(Cr)-B) as an efficient immobilization matrix of horseradish peroxidase (HRP). MIL-100(Cr)-B features a hierarchical porous structure, extremely high surface area, and sufficient recognition sites, which can significantly increase HRP loading and prevent them from leakage and deactivation. The H2O2 biosensor can be easily achieved without any complex processing. Meanwhile, the immobilized HRP exhibited enhanced stability and remarkable catalytic activity towards H2O2 reduction...
September 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28427624/ultrasound-assisted-biodiesel-production-by-a-novel-composite-of-fe-iii-based-mof-and-phosphotangestic-acid-as-efficient-and-reusable-catalyst
#15
Ahmad Nikseresht, Asra Daniyali, Mahdi Ali-Mohammadi, Ahmad Afzalinia, Abbas Mirzaie
In this work, esterification of oleic acid by various alcohols is achieved with high yields under ultrasonic irradiation. This reaction performed with a novel heterogeneous catalyst that fabricated by heteropoly acid and Fe(III)-based MOF, namely MIL-53 (Fe). Syntheses of MIL-53 and encapsulation process carry out by ultrasound irradiation at ambient temperature and atmospheric pressure. The prepared composite was characterized by various techniques such as XRD, FT-IR, SEM, BET and ICP that demonstrate excellent catalytic activities, while being highly convenient to synthesize...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28426035/hierarchical-bioi-nanostructures-supported-on-a-metal-organic-framework-as-efficient-photocatalysts-for-degradation-of-organic-pollutants-in-water
#16
M Jahurul Islam, Hyun Kook Kim, D Amaranatha Reddy, Yujin Kim, Rory Ma, Heehyun Baek, Joonghan Kim, Tae Kyu Kim
Semiconductor-based photocatalysis is a green method for the removal of toxic organic pollutants by decomposition into harmless products. However, traditional single-component semiconductors are unable to reach high degradation efficiencies due to excessive photo charge carrier recombination. The use of hybrid nanocomposite photocatalysts is a promising strategy for overcoming this problem by reducing recombination as well as ensuring that large amounts of solar energy are harvested. Herein, a novel visible-light-active hybrid nanocomposite, BiOI/MIL-88B(Fe), was successfully synthesized through a simple precipitation method...
May 9, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28425122/mean-intercept-anisotropy-analysis-of-porous-media-ii-conceptual-shortcomings-of-the-mil-tensor-definition-and-minkowski-tensors-as-an-alternative
#17
Michael A Klatt, Gerd E Schröder-Turk, Klaus Mecke
PURPOSE: Structure-property relations, which relate the shape of the microstructure to physical properties such as transport or mechanical properties, need sensitive measures of structure. What are suitable fabric tensors to quantify the shape of anisotropic heterogeneous materials? The mean intercept length is among the most commonly used characteristics of anisotropy in porous media, e. g., of trabecular bone in medical physics. Yet, in this series of two papers we demonstrate that it has conceptual shortcomings that limit the validity of its results...
April 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28423139/trend-of-leprosy-in-individuals-under-the-age-of-15-in-mato-grosso-brazil-2001-2013
#18
Bruna Hinnah Borges Martins de Freitas, Denise da Costa Boamorte Cortela, Silvana Margarida Benevides Ferreira
OBJECTIVE: To identify the historical trend of leprosy epidemiological indicators in individuals under the age of 15 in the state of Mato Grosso. METHODS: Descriptive study with trend analysis of leprosy indicators in individuals under the age of fifteen registered in the Mato Grosso's System for Notifiable Diseases between 2001 and 2013. We used the Prais-Winsten procedure for analyzing generalized linear regression at a significance level of 5%. We considered as increasing time series when the annual percent change was positive, decreasing when negative and stationary when there was no significant difference between its value and zero...
April 10, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28414943/ship-in-a-bottle-cmpo-in-mil-101-cr-for-selective-uranium-recovery-from-aqueous-streams-through-adsorption
#19
Jeroen De Decker, Karel Folens, Jeriffa De Clercq, Maria Meledina, Gustaaf Van Tendeloo, Gijs Du Laing, Pascal Van Der Voort
Mesoporous MIL-101(Cr) is used as host for a ship-in-a-bottle type adsorbent for selective U(VI) recovery from aqueous environments. The acid-resistant cage-type MOF is built in-situ around N,N-Diisobutyl-2-(octylphenylphosphoryl)acetamide (CMPO), a sterically demanding ligand with high U(VI) affinity. This one-step procedure yields an adsorbent which is an ideal compromise between homogeneous and heterogeneous systems, where the ligand can act freely within the pores of MIL-101, without leaching, while the adsorbent is easy separable and reusable...
April 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28411816/a-novel-metal-organic-framework-composite-mil-101-cr-go-as-an-efficient-sorbent-in-dispersive-micro-solid-phase-extraction-coupling-with-uhplc-ms-ms-for-the-determination-of-sulfonamides-in-milk-samples
#20
Xiuna Jia, Pan Zhao, Xiu Ye, Lianjun Zhang, Ting Wang, Qinyu Chen, Xiaohong Hou
As a novel material, metal-organic framework/graphite oxide (MIL-101(Cr)@GO) has great potential for the pretreatment of trace analytes. In the present study, MIL-101(Cr)@GO was synthesized using a solvothermal synthesis method at the nanoscale and was applied as sorbent in the dispersive micro-solid phase extraction (DMSPE) for the enrichment of the trace sulfonamides (SAs) from milk samples for the first time. Several experimental parameters including kinds of sorbents, the effect of pH, the amount of MIL-101(Cr)@GO, ionic strength, adsorption time, desorption solvent and desorption time were investigated...
July 1, 2017: Talanta
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