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https://www.readbyqxmd.com/read/29161467/continuous-flow-synthesis-of-supported-magnetic-iron-oxide-nanoparticles-for-efficient-isoeugenol-conversion-to-vanillin
#1
María Dolores Marquez, Pepijn Prinsen, Hangkong Li, Kaimin Shih, Antiono Ángel Romero Reyes, Rafael Luque
This work presents the synthesis of iron oxide nanocatalysts supported on mesoporous Al-SBA-15 using a continuous flow set-up. The magnetic solid nanoparticles were tested as catalysts for the oxidative disruption of isoeugenol using hydrogen peroxide as the oxidant, showing all high activity (63-88 % conversion) and fare selectivity to vanillin (44-68 %). The nanoparticles exhibited good magnetic properties, whensynthesized at continuous flow temperatures not exceeding 190 °C, which is important to enable their efficient separation from reaction mixtures...
November 21, 2017: ChemSusChem
https://www.readbyqxmd.com/read/29160627/native-and-microwave-modified-terminalia-mantaly-gums-as-sustained-release-and-bioadhesive-excipients-in-naproxen-matrix-tablet-formulations
#2
Michael Ayodele Odeniyi, Babatunde Mukhtar Oyedokun, Oluyemisi Adebowale Bamiro
BACKGROUND: Hydrophilic polymers provide a means of sustaining drug delivery. Native gums may be limited in function, but modification may improve their activity. OBJECTIVES: The aim of the study was to evaluate native and modified forms of Terminalia mantaly gum for their sustained-release and bioadhesive properties. MATERIAL AND METHODS: The native gum (NTM) was modified by microwave irradiation for 20 seconds (MTM20) and 60 seconds (MTM60) and characterized using microscopy, Fourier transform infrared spectroscopy (FTIR) and packing properties...
January 2017: Polimery W Medycynie
https://www.readbyqxmd.com/read/29160605/1-5-disubstituted-1-2-3-triazole-containing-peptidotriazolamers-design-principles-for-a-class-of-versatile-peptidomimetics
#3
Oliver Kracker, Jerzy Góra, Joanna Krzciuk-Gula, Antoine Marion, Beate Neumann, Hans-Georg Stammler, Anke Nieß, Iris Antes, Rafal Latajka, Norbert Sewald
Peptidotriazolamers are hybrid foldamers combining features of peptides and triazolamers - repetitive peptidomimetic structures with triazoles replacing peptide bonds. We report on the synthesis of a new class of peptidomimetics, containing 1,5-disubstituted 1,2,3-triazoles in an alternating fashion with amide bonds and the analysis of their conformation in solid state and solution. Homo- or heterochiral peptidotriazolamers were obtained from enantiomerically pure propargylamines with stereogenic centers in the propargylic position and alpha-azido esters by ruthenium-catalyzed azide-alkyne cycloaddition (RuAAC) under microwave conditions in high yields...
November 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29158566/graphene-quantum-dots-for-cell-proliferation-nucleus-imaging-and-photoluminescent-sensing-applications
#4
Mukesh Kumar Kumawat, Mukeshchand Thakur, Raju B Gurung, Rohit Srivastava
We report a simple one-pot microwave assisted "green synthesis" of Graphene Quantum Dots (GQDs) using grape seed extract as a green therapeutic carbon source. These GQDs readily self-assemble, hereafter referred to as "self-assembled" GQDs (sGQDs) in the aqueous medium. The sGQDs enter via caveolae and clathrin-mediated endocytosis and target themselves into cell nucleus within 6-8 h without additional assistance of external capping/targeting agent. The tendency to self-localize themselves into cell nucleus also remains consistent in different cell lines such as L929, HT-1080, MIA PaCa-2, HeLa, and MG-63 cells, thereby serving as a nucleus labelling agent...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158559/carbon-spheres-mno2-core-shell-nanocomposites-with-enhanced-dielectric-properties-for-electromagnetic-shielding
#5
Huiya Wang, Zhifan Zhang, Chengjun Dong, Gang Chen, Yude Wang, Hongtao Guan
Carbon spheres (CS)@MnO2 core-shell nanocomposites, with MnO2 nanoflakes uniformly coating at the surface of CS cores, were successfully synthesized by a facile water-bathing method. MnO2 amounts is estimated to be 24.7 wt% in CS@MnO2 nanocomposites. A high dielectric loss value and an electromagnetic shielding effectiveness of 16‒23 dB were observed for the CS@MnO2 in the frequency range of 8‒18 GHz, which is mainly attributed to the enhanced absorption loss. The incorporation of the CS with MnO2 improves the electrical conductivity...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29155073/dynamics-of-hpv-viral-loads-reflect-the-treatment-effect-of-photodynamic-therapy-in-genital-warts
#6
Zhili Hu, Lishi Liu, Wenjing Zhang, Hui Liu, Junpeng Li, Lifen Jiang, Kang Zeng
BACKGROUND: Photodynamic therapy (PDT) has demonstrated good clinical cure rates and low recurrence rates in the treatment of genital warts. Human papillomavirus (HPV) genotypes and viral load assays can reflect the status of persistent or latent infection and serve as a predictor of infection clearance. METHODS: Specimens from 41 patients with HPV infection were obtained, and the HPV genotypes and viral load were analyzed using real-time polymerase chain reaction (PCR) assays...
November 15, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29153770/rats-exposed-to-2-45ghz-of-non-ionizing-radiation-exhibit-behavioral-changes-with-increased-brain-expression-of-apoptotic-caspase-3
#7
Rini Varghese, Anuradha Majumdar, Girish Kumar, Amit Shukla
In recent years there has been a tremendous increase in use of Wi-Fi devices along with mobile phones, globally. Wi-Fi devices make use of 2.4GHz frequency. The present study evaluated the impact of 2.45GHz radiation exposure for 4h/day for 45days on behavioral and oxidative stress parameters in female Sprague Dawley rats. Behavioral tests of anxiety, learning and memory were started from day 38. Oxidative stress parameters were estimated in brain homogenates after sacrificing the rats on day 45. In morris water maze, elevated plus maze and light dark box test, the 2...
November 14, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/29152968/natural-carbonized-sugar-as-a-low-temperature-ammonia-sensor-material-experimental-theoretical-and-computational-studies
#8
Balaji Ghule, Shoyebmohamad F Shaikh, Satish Ekar, Umesh Tukaram Nakate, Krishna Chaitanya Gunturu, Nanasaheb Shinde, Mu Naushad, Kwang Ho Kim, Colm O'Dwyer, Rajaram Mane
Bearing in mind the advantages of useful, cost-effective and eco-friendly synthesis, carbonized sugar (CS) has been synthesized via microwave-assisted carbonization of market quality table-top sugar. The as-prepared CS has been characterized for its morphology, phase purity, type of porosity and pore-size distribution. The gas sensing properties of CS for various oxidizing and reducing gases are demonstrated at ambient temperature where we observe good selectivity towards liquid ammonia amongst other gases...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29152914/self-assembled-3d-helical-hollow-superstructures-with-enhanced-microwave-absorption-properties
#9
Yang Yang, Jianqi Zhang, Wenjun Zou, Sai Wu, Fan Wu, Aming Xie, Zhixiang Wei
Helical structures at different scales endow functional materials with special optical, electrical, and magnetic properties. However, methods for constructing and regulating single-handed helicity, particularly complex 3D hierarchical structures, remain limited. In this study, co-self-assembly process combined with emulsion droplets is used to produce the various well-defined 3D hollow superstructures of conducting polyaniline (PANI) with single-handed helicity. The chirality of PANI is induced using enantiomeric r- or s-camphorsulfonic acid as a dopant; the chirality of the dopant is then transferred to the supramolecular chirality of PANI assemblies and consequently to the helicity of 3D superstructures by incorporating emulsion droplets to serve collectively as soft templates...
November 20, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29152740/microwave-as-a-rapid-cooking-method-for-beef-tenderness-evaluation
#10
Douglas R G Silva, Ludimila C Fernandez, Robledo A Torres Filho, Paulo R Fontes, Alcinéia L S Ramos, Eduardo M Ramos
M. Semitendinosus steaks were grouped according to three locations (proximal, middle and distal end), grilled to endpoint temperature of 71°C or cooked for 20, 30, 40, 50 or 60 s in a microwave oven (Mw). The location did not affect (P > 0.05) the cooking loss (CL) or shear force (SF) values. The CL increased (P < 0.05) with longer microwave cooking times, but only the Mw40 samples did not differ (P > 0.05) from the grill samples. None of the microwaves' SF values were different (P > 0...
November 20, 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/29152693/synthesis-of-2-ethylhexyl-palmitate-catalyzed-by-enzyme-under-microwave
#11
Lei Wang, Yang Zhang, Yuxin Zhang, Lu Zheng, He Huang, Zhi Wang
2-Ethylhexyl palmitate has been prepared in organic solvents catalyzed by an immobilized lipase QLM. Microwave irradiation was used to improve the enzyme activity and shorten the reaction time. The reaction conditions under microwave have been optimized. Compared with that of the free QLM under classical heating, the immobilized QLM under microwave exhibited higher enzyme activity and the conversion could achieve 99% in about 3.0 h. Furthermore, the immobilized QLM displayed excellent reusability under microwave irradiation...
November 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29152624/preparation-of-fe-mofs-by-microwave-assisted-ball-milling-for-reducing-cr-vi-in-wastewater
#12
Fu-Hua Wei, Ding Chen, Zhao Liang, Shuai-Qi Zhao, Yun Luo
Fe-Based metal-organic frameworks (Fe-MOFs) were prepared with trimesic acid and FeSO4·7H2O via a microwave-assisted ball milling approach. The structure and thermal stability of the as-prepared Fe-MOFs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). When used to degrade 20 mg L(-1) hexavalent chromium in aqueous solution, the Fe-MOFs were found to completely reduce a 100 mL solution within 120 min under natural light and a 400 mL solution within 90 min under Xe lamp irradiation...
November 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29152370/unusual-thermolysis-of-aza-cyclic-allene-under-microwave-conditions-crystal-structure-of-3rs-3asr-8rs-8ars-methyl-5-6-dimeth-oxy-3a-10-dimethyl-1-phenyl-3-3a-8-8a-tetra-hydro-3-8-epimino-methano-cyclo-penta-a-indene-2-carboxyl-ate-from-synchrotron-x-ray-diffraction
#13
Le Tuan Anh, Alexander A Titov, Maxim S Kobzev, Leonid G Voskressensky, Alexey V Varlamov, Pavel V Dorovatovskii, Victor N Khrustalev
The title compound, C25H27NO4 (I), the product of the unusual thermolysis of aza-cyclic allene methyl 10,11-dimeth-oxy-3,8-dimethyl-6-phenyl-3-aza-benzo[d]cyclo-deca-4,6,7-triene-5-carboxyl-ate, represents a bicyclic heterosystem and crystallizes in the monoclinic space group P21/c with three crystallographically independent mol-ecules in the unit cell. These independent mol-ecules adopt very similar geometries and differ only in the conformations of the two meth-oxy substituents on the benzene ring. In two of the three independent mol-ecules, both meth-oxy groups are almost coplanar with the benzene ring [the C-C-O-Me torsion angles are 10...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29152342/green-synthesis-and-crystal-structure-of-3-benzo-thia-zol-2-yl-thio-phene
#14
Linh Nguyen Ngoc, Trung Vu Quoc, Hoan Duong Quoc, Manh Vu Quoc, Luong Truong Minh, Chien Thang Pham, Luc Van Meervelt
The title compound, C11H7NS2, was prepared in high yield (87%) using a solvent-free microwave-assisted synthesis. The structure shows whole-mol-ecule disorder with occupancies for two orientations (A and B) of 0.4884 (10) and 0.5116 (10), respectively. The thio-phene and benzo-thia-zole rings are almost planar and make dihedral angles of 10.02 (18) and 12.54 (19)° for orientations A and B, respectively. Slipped π-π stacking between the aromatic rings, together with C-H⋯π, C-H⋯S and C-H⋯N inter-actions, result in a herringbone motif in the crystal packing...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29151677/uniform-field-re-entrant-cylindrical-te-formula-see-text-cavity-for-pulse-electron-paramagnetic-resonance-spectroscopy-at-q-band
#15
Jason W Sidabras, Edward J Reijerse, Wolfgang Lubitz
Uniform field (UF) resonators create a region-of-interest, where the sample volume receives a homogeneous microwave magnetic field ([Formula: see text]) excitation. However, as the region-of-interest is increased, resonator efficiency is reduced. In this work, a new class of uniform field resonators is introduced: the uniform field re-entrant cylindrical TE[Formula: see text] cavity. Here, a UF cylindrical TE[Formula: see text] cavity is designed with re-entrant fins to increase the overall resonator efficiency to match the resonator efficiency maximum of a typical cylindrical TE[Formula: see text] cavity...
2017: Applied Magnetic Resonance
https://www.readbyqxmd.com/read/29151676/jim-hyde-and-the-endor-connection-a-personal-account
#16
Klaus Möbius, Wolfgang Lubitz, Anton Savitsky
In this minireview, we report on our year-long EPR work, such as electron-nuclear double resonance (ENDOR), pulse electron double resonance (PELDOR) and ELDOR-detected NMR (EDNMR) at X-band and W-band microwave frequencies and magnetic fields. This report is dedicated to James S. Hyde and honors his pioneering contributions to the measurement of spin interactions in large (bio)molecules. From these interactions, detailed information is revealed on structure and dynamics of macromolecules embedded in liquid-solution or solid-state environments...
2017: Applied Magnetic Resonance
https://www.readbyqxmd.com/read/29151407/minerals-and-trace-elements-in-milk-milk-products-infant-formula-and-adult-pediatric-nutritional-formula-icp-ms-method-collaborative-study-aoac-final-action-2015-06-iso-dis-21424-idf-243
#17
Lawrence H Pacquette, Joseph J Thompson
AOAC Final Action Official Method(SM)2015.06 “Minerals and Trace Elements in Milk, Milk Products, Infant Formula and Adult/Pediatric Nutritional Formula, ICP-MS Method” was collaboratively studied. Note that “milk, milk products” has now been added to the title of the Final Action method because whole milk and several dairy ingredients were successfully incorporated into the collaborative study for the purpose of developing an International Organization for Standardization/International Dairy Federation standard (ISO/DIS 21424; in progress)...
November 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/29150668/publisher-correction-the-influence-of-liposomal-quercetin-on-liver-damage-induced-by-microwave-ablation
#18
Xuhua Duan, Pengfei Chen, Xinwei Han, Jianzhuang Ren, Zhaoyang Wang, Guorui Zhao, Hao Li
A correction to this article has been published and is linked from the HTML version of this paper. The error has been fixed in the paper.
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29149619/association-of-snps-in-genes-encoding-zinc-transporters-on-blood-zinc-levels-in-humans
#19
Junko Fujihara, Toshihiro Yasuda, Kaori Kimura-Kataoka, Yoshikazu Takinami, Masataka Nagao, Haruo Takeshita
Zinc homeostasis in cells depends on zinc transporters, which are divided into 2 families: ZnT (SLC30A) and ZIP (SLC39A). In this study, we examined the effect of 20 single nucleotide polymorphisms (SNPs) in 10 genes encoding zinc transporters on blood zinc concentration in Japanese subjects (n = 102). Blood zinc levels were determined by microwave plasma-atomic emission spectrometry, and SNPs were analyzed by polymerase chain reaction followed by restriction fragment length polymorphism analysis. Among the 20 SNPs examined, 3 SNPs (SLC30A3 rs11126936, SLC39A8 rs233804, and SLC39A14 rs4872479) were significantly associated with blood zinc concentration...
November 9, 2017: Legal Medicine
https://www.readbyqxmd.com/read/29147085/a-comparison-of-the-essential-amino-acid-content-and-the-retention-rate-by-chicken-part-according-to-different-cooking-methods
#20
Honggyun Kim, Hyun Wook Do, Heajung Chung
This study set out to identify the changes in the nutrient contents during the chicken cooking process as basic data for the establishment of a national health nutrition policy. Samples were produced using 3 chicken parts (wing, breast, and leg) and 7 cooking methods (boiling, pancooking, pan-frying, deep-frying, steaming, roasting, and microwaving), and the essential amino acid contents, principal components, and retention rates were analyzed. Weight loss was observed in all chicken parts with all cooking methods...
2017: Korean Journal for Food Science of Animal Resources
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