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https://www.readbyqxmd.com/read/27914342/cu3-btc-2-catalyzed-dehydrogenative-coupling-of-dimethylphenylsilane-with-phenol-and-homocoupling-of-dimethylphenylsilane-to-disiloxane
#1
Nagaraj Anbu, Amarajothi Dhakshinamoorthy
Cu3(BTC)2 (BTC: 1,3,5-benzenetricarboxylic acid) showed to be an efficient and reusable heterogeneous solid catalyst for the formation of SiO bond through dehydrogenative coupling of dimethylphenylsilane (1) with phenol under mild reaction conditions. It is observed that Fe(BTC), MIL-101(Cr) and UiO-66(Zr) are not able to promote this cross coupling between 1 and phenol. Cu3(BTC)2 exhibits higher stability and activity compared to other MOFs studied here. Furthermore, Cu3(BTC)2 is reused for three consecutive cycles with a slight decay in its activity...
November 24, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27912071/classical-and-alternative-macrophages-have-impaired-function-during-acute-and-chronic-hiv-1-infection
#2
Leonardo J Galvão-Lima, Milena S Espíndola, Luana S Soares, Fabiana A Zambuzi, Maira Cacemiro, Caroline Fontanari, Valdes R Bollela, Fabiani G Frantz
OBJECTIVES: Three decades after HIV recognition and its association with AIDS development, many advances have emerged - especially related to prevention and treatment. Undoubtedly, the development of Highly Active Antiretroviral Therapy (HAART) dramatically changed the future of the syndrome that we know today. In the present study, we evaluate the impact of HAART on macrophage function and its relevance to HIV pathogenesis. METHODS: PBMCs were isolated from blood samples and monocytes (CD14+ cells) were purified...
November 29, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27906045/smoking-is-associated-with-the-concurrent-presence-of-multiple-autoantibodies-in-rheumatoid-arthritis-rather-than-with-anti-citrullinated-protein-antibodies-per-se-a-multicenter-cohort-study
#3
Tineke J van Wesemael, Sofia Ajeganova, Jennifer Humphreys, Chikashi Terao, Ammar Muhammad, Deborah P M Symmons, Alex J MacGregor, Ingiäld Hafström, Leendert A Trouw, Annette H M van der Helm-van Mil, Tom W J Huizinga, Tsuneyo Mimori, René E M Toes, Fumihiko Matsuda, Björn Svensson, Suzanne M M Verstappen, Diane van der Woude
BACKGROUND: The contribution of smoking to rheumatoid arthritis (RA) is hypothesized to be mediated through formation of anti-citrullinated protein antibodies (ACPA). In RA, however, autoantibodies such as ACPA, rheumatoid factor (RF), and anti-carbamylated protein antibodies (anti-CarP) often occur together, and it is thus unclear whether smoking is specifically associated with some autoantibodies rather than others. We therefore investigated whether smoking is only associated with ACPA or with the presence of multiple RA-related autoantibodies...
December 1, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27896898/assembling-polyoxo-titanium-clusters-and-cds-nanoparticles-to-a-porous-matrix-for-efficient-and-tunable-h2-evolution-activities-with-visible-light
#4
Zhiqiang Jiang, Jinxiu Liu, Meiyan Gao, Xi Fan, Lei Zhang, Jian Zhang
Polyoxo-titanium clusters (PTCs) are applied to construct highly efficient ternary PTC/CdS/MIL-101 visible-light-range H2 -evolution photocatalysts. The application of PTCs not only increases the photocatalytic activities but also provides a molecular tool to tune them.
November 29, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27895255/flue-gas-and-direct-air-capture-of-co2-by-porous-metal-organic-materials
#5
David G Madden, Hayley S Scott, Amrit Kumar, Kai-Jie Chen, Rana Sanii, Alankriti Bajpai, Matteo Lusi, Teresa Curtin, John J Perry, Michael J Zaworotko
Sequestration of CO2, either from gas mixtures or directly from air (direct air capture), is a technological goal important to large-scale industrial processes such as gas purification and the mitigation of carbon emissions. Previously, we investigated five porous materials, three porous metal-organic materials (MOMs), a benchmark inorganic material, ZEOLITE 13X: and a chemisorbent, TEPA-SBA-15: , for their ability to adsorb CO2 directly from air and from simulated flue-gas. In this contribution, a further 10 physisorbent materials that exhibit strong interactions with CO2 have been evaluated by temperature-programmed desorption for their potential utility in carbon capture applications: four hybrid ultramicroporous materials, SIFSIX-3-CU: , DICRO-3-NI-I: , SIFSIX-2-CU-I: and MOOFOUR-1-NI: ; five microporous MOMs, DMOF-1: , ZIF-8: , MIL-101: , UIO-66: and UIO-66-NH2: ; an ultramicroporous MOM, NI-4-PYC: The performance of these MOMs was found to be negatively impacted by moisture...
January 13, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/27888150/coenzyme-q10-intake-from-foods-and-semen-parameters-in-a-subfertile-population
#6
Bruno C Tiseo, Audrey J Gaskins, Russ Hauser, Jorge E Chavarro, Cigdem Tanrikut
OBJECTIVE: To assess the association between coenzyme Q10 (CoQ10) intake from food sources and semen quality. We assessed this association in a prospective cohort of men attending a fertility clinic. CoQ10 supplementation has been associated with improvements in semen parameters. However, impact of CoQ10 intake from food sources on semen quality has not been investigated. METHODS: Subfertile couples seeking fertility evaluation at the Massachusetts General Hospital Fertility Center were invited to participate in an ongoing study of environmental factors and fertility...
November 22, 2016: Urology
https://www.readbyqxmd.com/read/27876480/noise-dosimetry-for-tactical-environments
#7
Christopher J Smalt, Joe Lacirignola, Shakti K Davis, Paul T Calamia, Paula P Collins
Noise exposure and the subsequent hearing loss are well documented aspects of military life. Numerous studies have indicated high rates of noise-induced hearing injury (NIHI) in active-duty service men and women, and recent statistics from the U.S. Department of Veterans Affairs indicate a population of veterans with hearing loss that is growing at an increasing rate. In an effort to minimize hearing loss, the U.S. Department of Defense (DoD) updated its Hearing Conservation Program in 2010, and also has recently revised the DoD Design Criteria Standard Noise Limits (MIL-STD-1474E) which defines allowable noise levels in the design of all military acquisitions including weapons and vehicles...
November 20, 2016: Hearing Research
https://www.readbyqxmd.com/read/27876243/quinone-modified-nh2-mil-101-fe-composite-as-a-redox-mediator-for-improved-degradation-of-bisphenol-a
#8
Xianghui Li, Weilin Guo, Zhonghua Liu, Ruiqin Wang, Hua Liu
A novel quinone-modified metal-organic frameworks NH2-MIL-101(Fe) was synthesized using a simple chemical method under mild condition. The introduced 2-anthraquinone sulfonate (AQS) can be covalently modified with NH2-MIL-101(Fe) and acts as a redox mediator to enhance the degradation of bisphenol A (BPA) via persulfate activation. The obtained AQS-NH-MIL-101(Fe) was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectra, cyclic voltammetry and electrochemical impedance spectroscopy...
November 15, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27873229/subclinical-kidney-damage-in-hypertensive-patients-a-renal-window-opened-on-the-cardiovascular-system-focus-on-microalbuminuria
#9
Giuseppe Mulè, Antonella Castiglia, Claudia Cusumano, Emilia Scaduto, Giulio Geraci, Dario Altieri, Epifanio Di Natale, Onofrio Cacciatore, Giovanni Cerasola, Santina Cottone
The kidney is one of the major target organs of hypertension.Kidney damage represents a frequent event in the course of hypertension and arterial hypertension is one of the leading causes of end-stage renal disease (ESRD).ESRD has long been recognized as a strong predictor of cardiovascular (CV) morbidity and mortality. However, over the past 20 years a large and consistent body of evidence has been produced suggesting that CV risk progressively increases as the estimated glomerular filtration rate (eGFR) declines and is already significantly elevated even in the earliest stages of renal damage...
November 22, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27866478/evaluating-drug-resistance-in-visceral-leishmaniasis-the-challenges
#10
S Hendrickx, P J Guerin, G Caljon, S L Croft, L Maes
For decades antimonials were the drugs of choice for the treatment of visceral leishmaniasis (VL), but the recent emergence of resistance has made them redundant as first-line therapy in the endemic VL region in the Indian subcontinent. The application of other drugs has been limited due to adverse effects, perceived high cost, need for parenteral administration and increasing rate of treatment failures. Liposomal amphotericin B (AmB) and miltefosine (MIL) have been positioned as the effective first-line treatments; however, the number of monotherapy MIL-failures has increased after a decade of use...
November 21, 2016: Parasitology
https://www.readbyqxmd.com/read/27862430/hydroxyapatite-nanowires-metal-organic-framework-core-shell-nanofibers-templated-synthesis-peroxidase-like-activity-and-their-derived-flexible-recyclable-test-paper
#11
Fei-Fei Chen, Ying-Jie Zhu, Zhi-Chao Xiong, Tuan-Wei Sun
The templated synthesis of metal-organic framework (MOF) nanofibers has been demonstrated herein. The ultralong hydroxyapatite (HAP) nanowires are chosen as the hard template to induce the nucleation and growth of MIL-100(Fe) (one of the typical MOFs) using the layer-by-layer method. The coulomb and chelation interactions between Ca2+ ions on the surface of HAP nanowires and organic linkers (COO-) of MIL-100(Fe) play key roles in the formation process. The as-prepared water-stable hydroxyapatite nanowires@MIL-100(Fe) nanofibers show peroxidase-like activity towards the oxidation of different peroxidase substrates in the presence of H2O2 accompanied with obvious color change of the solution...
November 14, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27859713/core-shell-gold-nanorod-metal-organic-framework-nanoprobes-for-multimodality-diagnosis-of-glioma
#12
Wenting Shang, Chaoting Zeng, Yang Du, Hui Hui, Xiao Liang, Chongwei Chi, Kun Wang, Zhongliang Wang, Jie Tian
One of the most significant challenges in the diagnosis of brain cancer is efficient in vivo imaging using nontoxic nanoprobes. Herein, core-shell gold nanorod@MIL-88(Fe) nanostars are successfully constructed as triple-modality imaging (computed tomography/magnetic-resonance imaging/photoacoustic imaging) nanoprobes that show low cytotoxicity, high contrast, high penetration depth, and high spatial resolution for accurate and noninvasive imaging and diagnosis of gliomas.
November 18, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27835816/modified-bi2wo6-with-metal-organic-frameworks-for-enhanced-photocatalytic-activity-under-visible-light
#13
Jingjing Zheng, Zhengbo Jiao
Bi2WO6/MIL-100(Fe) heterostructures with visible light response have been synthesized for the first time through a facile hydrothermal method. The as-synthesized Bi2WO6/MIL-100(Fe) nanocomposites were characterized using the powder X-ray diffraction, high resolution transmission electron microscopy, scanning electron microscopy, UV-vis diffuse reflectance spectra, and N2 adsorption-desorption techniques, respectively. The composition of Bi2WO6/MIL-100(Fe) nanocomposites has been varied and the performance was evaluated by photodegrading salicylic acid under visible-light irradiation...
November 3, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27830222/a-postsynthetically-modified-mof-hybrid-as-a-ratiometric-fluorescent-sensor-for-anion-recognition-and-detection
#14
Xiao Lian, Bing Yan
A metal-organic framework (MOF), MIL-125(Ti)-NH2, and its derivatives MIL-125(Ti)-AM and MIL-125(Ti)-AM-Eu are synthesized. The structure and morphology of the obtained-samples are characterized by some characterization methods such as XRD, SEM, IR and XPS. Under solvothermal conditions, MIL-125(Ti)-NH2 shows typical truncated bipyramid morphology, and the terminal amino group can be further modified by covalent postsynthetic modification (PSM). The functional MOFs exhibit excellent photoluminescence features, and they have been designed to be a ratiometric fluorescent sensor (IL/IEu) for sensitively detecting phosphate and oxalate, which are important substances in an organism...
November 10, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27819712/direct-synthesis-of-non-breathing-mil-53-al-ht-from-a-terephthalate-based-ionic-liquid-as-linker-precursor
#15
Marcus Fischer, Johannes Schwegler, Carolin Paula, Peter S Schulz, Martin Hartmann
An organic imidazolium salt of terephthalic acid has been utilized as a linker precursor for the synthesis of an aluminum-based metal organic framework (MOF) with MIL-53(ht) structure. This material shows the predicted porosity in terms of nitrogen and hydrogen sorption without exhibiting the breathing effect typical for MIL-53(Al) materials.
November 7, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27815918/incidence-and-characteristics-of-chronic-renal-replacement-therapy-in-patients-with-cancer-data-from-kidney-and-cancer-registries-in-basse-normandie
#16
Clémence Béchade, Olivier Dejardin, Simona Bara, Véronique Bouvier, Anne-Valérie Guizard, Rémy De Mil, Xavier Troussard, Thierry Lobbedez, Guy Launoy
Aims To estimate the incidence of chronic dialysis in patients with a history of cancer and assess how renal replacement therapy is initiated in this population. Methods We merged data from cancer registries and hospital databases in one French region to identify patients with an incident cancer between 2001 and 2008 who started chronic dialysis. Results Mean participation time was 3.4 ± 2.7 years. Males comprised 58.5 % of participants. During the study period, 74 chronic dialysis treatments were initiated...
November 4, 2016: Journal of Nephrology
https://www.readbyqxmd.com/read/27811276/ocean-mixing-and-ice-sheet-control-of-seawater-234u-238u-during-the-last-deglaciation
#17
Tianyu Chen, Laura F Robinson, Matthew P Beasley, Louis M Claxton, Morten B Andersen, Lauren J Gregoire, Jemma Wadham, Daniel J Fornari, Karen S Harpp
Seawater (234)U/(238)U provides global-scale information about continental weathering and is vital for marine uranium-series geochronology. Existing evidence supports an increase in (234)U/(238)U since the last glacial period, but the timing and amplitude of its variability has been poorly constrained. Here we report two seawater (234)U/(238)U records based on well-preserved deep-sea corals from the low-latitude Atlantic and Pacific Oceans. The Atlantic (234)U/(238)U started to increase before major sea-level rise and overshot the modern value by 3 per mil during the early deglaciation...
November 4, 2016: Science
https://www.readbyqxmd.com/read/27810811/friend-or-foe-fine-grained-categorization-with-weak-supervision
#18
Zhe Xu, Dacheng Tao, Shaoli Huang, Ya Zhang
Multi-instance learning (MIL) is widely acknowledged as a fundamental method to solve weakly supervised problems. Whilst MIL is usually effective in standard weakly supervised object recognition tasks, in this paper, we investigate the applicability of MIL on an extreme case of weakly supervised learning on the task of fine-grained visual categorization, in which intra-class variance could be larger than inter-class due to the subtle differences between subordinate categories. For this challenging task, we propose a new method that generalizes the standard multi-instance learning framework, for which a novel multi-task co-localization algorithm is proposed to take advantage of the relationship among fine-grained categories and meanwhile performs as an effective initialization strategy for the non-convex multi-instance objective...
October 26, 2016: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/27805207/polystyrene-sulfonate-threaded-in-mil-101cr-iii-as-stable-and-efficient-acid-catalysts
#19
Tengfei Kong, Guoqiang Guo, Jiageng Pan, Liang Gao, Yanping Huo
A series of polystyrene sulfonate threaded in MIL-101Cr(iii) composites both with and without cross-linkers were synthesized. These composites demonstrated superior activity and durability for the acid catalyzed reaction, thus highlighting the importance of surface properties, mobility and accessibility of active sites in determining the catalytic performance.
November 2, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27797983/efficacy-of-various-types-of-laryngoscope-direct-pentax-airway-scope-and-glidescope-for-endotracheal-intubation-in-various-cervical-immobilisation-scenarios-a-randomised-cross-over-simulation-study
#20
Jong Won Kim, Kyeong Ryong Lee, Dae Young Hong, Kwang Je Baek, Young Hwan Lee, Sang O Park
OBJECTIVE: To compare the efficacy of direct laryngoscopy (DL), Pentax Airway Scope (PAWS) and GlideScope video laryngoscope (GVL) systems for endotracheal intubation (ETI) in various cervical immobilisation scenarios: manual in-line stabilisation (MILS), Philadelphia neck collar (PNC) (moderate limit of mouth opening) and Stifneck collar (SNC) (severe limit of mouth opening). DESIGN: Randomised cross-over simulation study. SETTING AND PARTICIPANTS: 35 physicians who had >30 successful ETI experiences at a tertiary hospital in Seoul, Korea...
October 24, 2016: BMJ Open
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