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https://www.readbyqxmd.com/read/30121557/novel-controllable-hydrophilic-thermo-responsive-molecularly-imprinted-resin-adsorbent-prepared-in-water-for-selective-recognition-of-alkaloids-by-thermal-assisted-dispersive-solid-phase-extraction
#1
Weiyang Tang, Kyung Ho Row
A novel controllable hydrophilic thermo-responsive molecularly imprinted resin (T-MIR) with a switchable zipper-like architecture was synthesized in the aqueous phase and applied to the selective recognition and extraction of alkaloids by positive temperature regulation. In this synthesis process of T-MIR, 2-acrylamide-2- methylpropanesulfonic acid (AMPS) and acrylamide (AAm) were coupled as zipper-like thermo-responsive monomers, resorcinol, and melamine as hydrophilic monomers, formaldehyde as a cross-linker, and berberine chloride (BerbC) as the template...
August 10, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/30120571/cellulose-exopolysaccharide-from-sugarcane-molasses-as-a-suitable-substrate-for-2d-and-3d-neuron-and-astrocyte-primary-cultures
#2
Catarina Gonçalves-Pimentel, Giselle Machado Magalhães Moreno, Bruna Soares Trindade, Alinny Rosendo Isaac, Claudio Gabriel Rodrigues, Mythili Savariradjane, Amanda Vasconcelos de Albuquerque, José Lamartine de Andrade Aguiar, Belmira Lara da Silveira Andrade-da-Costa
Bacteria-synthesized polysaccharides have attracted interest for biomedical applications as promising biomaterials to be used as implants and scaffolds. The present study tested the hypothesis that cellulose exopolysaccharide (CEC) produced from sugarcane molasses of low cost and adequate purity would be suitable as a template for 2D and 3D neuron and/or astrocyte primary cultures, considering its low toxicity. CEC biocompatibility in these primary cultures was evaluated with respect to cell viability, adhesion, growth and cell function (calcium imaging)...
August 17, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/30119731/a-class-specific-artificial-receptor-based-on-molecularly-imprinted-polymer-coated-quantum-dot-centers-for-the-detection-of-signaling-molecules-n-acyl-homoserine-lactones-present-in-gram-negative-bacteria
#3
Jean de Dieu Habimana, Jian Ji, Fuwei Pi, Eric Karangwa, Jiadi Sun, Wei Guo, Fangchao Cui, Jingdong Shao, Claudine Ntakirutimana, Xiulan Sun
Herein, a novel class-specific artificial receptor-based on molecularly imprinted polymer (MIP)-coated quantum dots (QDs@MIP) was synthesized, characterized, and used for the detection and quantification of the bacterial quorum signaling molecules N-acyl-homoserine lactones (AHLs), a class of autoinducers from Gram-negative bacteria. The QDs@MIP was prepared by surface imprinting technique under controlled conditions using CdSe/ZnS QDs as the signal transducing material. The synthesis of the QDs@MIP was characterized by transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction analysis, and fluorescence spectroscopy...
November 15, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/30117677/licl-salts-as-phase-transfer-catalysts-to-synthesize-ultrathin-co2p-nanosheets-for-water-splitting
#4
Zhiming Pan, Pingping Niu, Yidong Hou, Yuanxing Fang, Minghui Liu, Xinchen Wang
Inorganic salts have been widely studied as template for the synthesis of 2D layer structure. However, these salts normally can only serve as templates without any catalytic property. Here, we report that the using LiCl salts for the synthesis of ultrathin nanosheets, such salts not only serve as templates to synthesize the ultrathin Co2P nanosheets with thickness of 0.7nm, but also act as phase-transfer catalysts to induce phase-transfer from CoP to Co2P. The Co2P nanosheets present a high electrochemical performance for oxygen evolution reaction...
August 17, 2018: ChemSusChem
https://www.readbyqxmd.com/read/30114647/roles-of-cobalt-and-cerium-species-in-three-dimensionally-ordered-macroporous-co-x-ce-1-x-o-%C3%AE-catalysts-for-the-catalytic-oxidation-of-diesel-soot
#5
Baofang Jin, Xiaodong Wu, Duan Weng, Shuang Liu, Tingting Yu, Zhen Zhao, Yuechang Wei
Three-dimensionally ordered macroporous (3DOM) Cox Ce1- x Oδ oxides with different Co/Ce atomic ratios were synthesized by a colloidal crystal template (CCT) method. They show higher activity for soot combustion in O2 than single CeO2 and Co3 O4 under loose contact conditions. XRD, Raman, XPS, H2 -TPR and soot-TPR characterizations were carried out to study the surface and bulk oxygen vacancies and to correlate them to the activity. There exists electron transfer from Ce to Co in the matrix. Both Ce3+ and Co2+ species contribute importantly to the creation of surface and bulk oxygen vacancies, which determine the ignition and burnout temperatures of the catalysts, respectively...
August 9, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30110421/effect-of-hf-doping-on-electrochemical-performance-of-anatase-tio-2-as-an-anode-material-for-lithium-storage
#6
Sergey V Gnedenkov, Sergey L Sinebryukhov, Veniamin V Zheleznov, Denis P Opra, Elena I Voit, Evgeny B Modin, Alexander A Sokolov, Alexander Yu Ustinov, Valentin I Sergienko
Hafnium-doped titania (Hf/Ti = 0.01; 0.03; 0.05) had been facilely synthesized via a template sol-gel method on carbon fibre. Physico-chemical properties of the as-synthesized materials were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis, scanning transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry analysis and Brunauer-Emmett-Teller measurements. It was confirmed that Hf4+ substitute in the Ti4+ sites, forming Ti1- x Hf x O2 ( x  = 0...
June 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/30109313/evolving-mechanism-of-organotemplate-free-hierarchical-fau-zeolites-with-house-of-card-like-structures
#7
Lijia Liu, Hongbin Wang, Ziqi Wang, Liangkui Zhu, Lin Huang, Liang Yu, Jinya Fan, Yuechao Yao, Shiyu Liu, Jizhao Zou, Xierong Zeng
Hierarchical FAU zeolites with house-of-card-like (HCL) structures were synthesized through a one-pot organotemplate-free route in the Na2O-Al2O3-SiO2-H2O system. The structure details and formation mechanism of HCL zeolites were determined by the combination of electron crystallography and synthesis chemistry. The results revealed that the unique HCL morphology was attributed to large solution viscosity, and the evolution process obeyed a skeleton crystal growth model due to the limited vortexing effect, which was different from those of the HCL zeolites obtained using organic templates...
August 15, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30108989/effect-of-n-1-arylation-of-monastrol-on-kinesin-eg5-inhibition-in-glioma-cell-lines
#8
Itamar Luís Gonçalves, Liliana Rockenbach, Gustavo Machado das Neves, Gabriela Göethel, Fabiana Nascimento, Luciano Porto Kagami, Fabrício Figueiró, Gabriel Oliveira de Azambuja, Amanda de Fraga Dias, Andressa Amaro, Lauro Mera de Souza, Ivan da Rocha Pitta, Daiana Silva Avila, Daniel Fábio Kawano, Solange Cristina Garcia, Ana Maria Oliveira Battastini, Vera Lucia Eifler-Lima
An original and focused library of two sets of dihydropyrimidin-2-thiones (DHPMs) substituted with N-1 aryl groups derived from monastrol was designed and synthesized in order to discover a more effective Eg5 ligand than the template. Based on molecular docking studies, four ligands were selected to perform pharmacological investigations against two glioma cell lines. The results led to the discovery of two original compounds, called 20h and 20e , with an anti-proliferative effects, achieving IC50 values of about half that of the IC50 of monastrol in both cell lines...
June 1, 2018: MedChemComm
https://www.readbyqxmd.com/read/30108146/generating-carbon-schwarzites-via-zeolite-templating
#9
Efrem Braun, Yongjin Lee, Seyed Mohamad Moosavi, Senja Barthel, Rocio Mercado, Igor A Baburin, Davide M Proserpio, Berend Smit
Zeolite-templated carbons (ZTCs) comprise a relatively recent material class synthesized via the chemical vapor deposition of a carbon-containing precursor on a zeolite template, followed by the removal of the template. We have developed a theoretical framework to generate a ZTC model from any given zeolite structure, which we show can successfully predict the structure of known ZTCs. We use our method to generate a library of ZTCs from all known zeolites, to establish criteria for which zeolites can produce experimentally accessible ZTCs, and to identify over 10 ZTCs that have never before been synthesized...
August 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/30107736/controlled-synthesis-of-carbon-nanospheres-via-the-modulation-of-the-hydrophilic-length-of-the-assembled-surfactant-micelles
#10
Zhitian Liu, Zekun Zhou, Wei Xiong, Qi Zhang
A co-polymerization-carbonization method was employed to synthesize porous carbon nanospheres (PCNS) by using pyrrole-aniline polymers as a carbon source and alkyl phenol non-ionic surfactants as templates. The effect of the hydrophilic length on the carbon-nanosphere size was systematically investigated. The so-prepared PCNS were characterized via high-magnification scanning electron microscope, dynamic light scattering (DLS) analysis, and N2-adsorption and desorption analysis. The results indicate that the obtained nanosphere diameter can be tuned by changing the length of the hydrophilic groups...
August 14, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/30107543/capping-race-a-simple-accurate-and-sensitive-5-race-method-for-use-in-prokaryotes
#11
Fang Liu, Ke Zheng, Huan-Chun Chen, Zheng-Fei Liu
Rapid amplification of cDNA ends (RACE) is a prevalent technique used to obtain the 5' ends of transcripts. Several different 5' RACE methods have been developed, and one particularly simple and efficient approach called CapFinder relies on the 5' cap-dependent template-switching that occurs in eukaryotes. However, most prokaryotic transcripts lack a 5' cap structure. Here, we report a procedure to capture primary transcripts based on capping the 5' triphosphorylated RNA in prokaryotes. Primary transcripts were first treated with vaccinia capping enzyme to add a 5' cap structure...
August 10, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/30106561/janus-nanoparticle-structural-motif-control-via-asymmetric-cation-exchange-in-edge-protected-cu-1-81-s-ir-x-s-y-hexagonal-nanoplates
#12
Jongsik Park, Jisol Park, Jaeyoung Lee, Aram Oh, Hionsuck Baik, Kwangyeol Lee
Post-synthetic transformation of nanoparticles has received great attention, because this approach can provide an unusual route to elaborately composition-controlled nanostructures while maintaining the overall structure of the template. In principle, anisotropic hetero-nanoparticles of semiconductor materials can be synthesized via localized, i.e., single site, cation exchange in symmetric nanoparticles. However, the differentiation of multiple identical cation exchange sites in symmetric nanoparticles can be difficult to achieve, especially for semiconductor systems with very fast cation exchange kinetics...
August 14, 2018: ACS Nano
https://www.readbyqxmd.com/read/30105533/chemotion-eln-part-2-adaption-of-an-embedded-ketcher-editor-to-advanced-research-applications
#13
Serhii Kotov, Pierre Tremouilhac, Nicole Jung, Stefan Bräse
The Ketcher editor, available as an Open Source software package for drawing chemical structures, has been expanded to include several features that allow storage, management and application of templates, as well as the use of symbols for a planning and processing of solid phase synthesis. In addition, tools for the drawing of coordinative bonds to represent e.g. organometallic compounds were added. The editor has been implemented into an Electronic Lab Notebook (ELN) application which enables the use of the Ketcher editor for advanced operations in chemistry research...
August 13, 2018: Journal of Cheminformatics
https://www.readbyqxmd.com/read/30105328/metal-organic-framework-templated-synthesis-of-sulfur-doped-core-sheath-nanoarrays-and-nanoporous-carbon-for-flexible-all-solid-state-asymmetric-supercapacitors
#14
Simeng Dai, Yan Yuan, Jiangsheng Yu, Jian Tang, Jie Zhou, Weihua Tang
Metal-organic frameworks (MOFs) provide great opportunities for synthesizing advanced electrode materials with hierarchical hollow architectures for energy storage. Herein, we report the facile fabrication of core-sheath nanoarrays (NAs) on carbon cloth (CC@CoO@S-Co3O4) for binder-free electrode materials with MOFs as versatile scaffolds. The hollow S-doped Co3O4 sheath has been facilely prepared using a two-step synthetic protocol, which includes the surface etching of CoO nanowires for synchronous in situ growth of well-aligned ZIF-67 and its following hydrothermal process...
August 14, 2018: Nanoscale
https://www.readbyqxmd.com/read/30105316/silicoaluminophosphate-11-sapo-11-molecular-sieves-synthesized-via-a-grinding-synthesis-method
#15
Yuxiang Liu, Yuchao Lyu, Xinxin Zhao, Lu Xu, Svetlana Mintova, Zifeng Yan, Xinmei Liu
Aluminophosphate molecular sieves with an AEL-type structure and various framework compositions were prepared via a grinding synthesis method (GSM). The rapid crystal growth rate was due to the enhanced interactions between the templates and aluminum species and abundant low-polymerized phosphorus species. The amount of template and water used was substantially reduced, which has a great economic and environment impact for large-scale synthesis.
August 14, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30104542/sol-gel-silica-nanoparticles-in-medicine-a-natural-choice-design-synthesis-and-products
#16
REVIEW
M Clara Gonçalves
Silica is one of the most abundant minerals in the Earth's crust, and over time it has been introduced first into human life and later into engineering. Silica is present in the food chain and in the human body. As a biomaterial, silica is widely used in dentistry, orthopedics, and dermatology. Recently amorphous sol-gel SiO₂ nanoparticles (NPs) have appeared as nanocarriers in a wide range of medical applications, namely in drug/gene target delivery and imaging diagnosis , where they stand out for their high biocompatibility, hydrophilicity, enormous flexibility for surface modification with a high payload capacity, and prolonged blood circulation time...
August 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30096740/solution-growth-of-3d-mno-2-mesh-comprising-1d-nanofibres-as-a-novel-sensor-for-selective-and-sensitive-detection-of-biomolecules
#17
Bushra Tehseen, Asma Rehman, Muniba Rahmat, Haq Nawaz Bhatti, Aiguo Wu, Faheem K Butt, Gul Naz, Waheed S Khan, Sadia Z Bajwa
This work is the first report describing the solution grown 3D manganese oxide nanofibrous (MnO2 NFs) mesh and its potential for the simultaneous detection of biomolecules such as ascorbic acid and uric acid. The mesh is synthesized by a facile, one-pot, and cost-effective hydrothermal approach without using any template or structure directing compound. The morphology consists of randomly placed nanofibres possessing a diameter in the range of 10-25 nm, and length of several micron; constituting a highly porous and flexible material...
October 15, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30096735/well-designed-dopamine-imprinted-polymer-interface-for-selective-and-quantitative-dopamine-detection-among-catecholamines-using-a-potentiometric-biosensor
#18
Taira Kajisa, Wei Li, Tsuyoshi Michinobu, Toshiya Sakata
We report a well-designed biointerface enabling the selective and quantitative detection of dopamine (DA) using a potentiometric biosensor. To enhance the detection selectivity of DA, a DA-templated molecularly imprinted polymer (DA-MIP) was synthesized on the extended Au gate electrode of a field-effect transistor (FET) biosensor. For a quantitative DA analysis, the thickness of the DA-MIP was controlled to ca. 60 nm by surface-initiated atom transfer radical polymerization (SI-ATRP). In this process, the DA-MIP was copolymerized with vinylphenylboronic acid (vinyl-PBA), inducing molecular charges at the biointerface of the FET gate electrode...
October 15, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/30096531/bismuth-oxyfluoride-bismuth-oxyiodide-nanocomposites-enhance-visible-light-driven-photocatalytic-activity
#19
Chiing-Chang Chen, Jing-Ya Fu, Jia-Lin Chang, Shiuh-Tsuen Huang, Tsung-Wen Yeh, Jiun-Ting Hung, Peng-Hao Huang, Fu-Yu Liu, Li-Wen Chen
This is the first paper to report a series of bismuth oxyfluoride/bismuth oxyiodide (BiOp Fq /BiOx Iy ) nanocomposites with different F/I molar ratios, pH values, and reaction temperatures that were synthesized through a template-free and controlled hydrothermal method. These nanocomposites were characterized through scanning electron microscope energy dispersive microscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), and diffuse reflectance spectroscopy (DRS)...
August 3, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30094442/designed-formation-of-co-3-o-4-znco-2-o-4-cuo-hollow-polyhedral-nanocages-derived-from-zeolitic-imidazolate-framework-67-for-high-performance-supercapacitors
#20
Saisai Zhou, Zhaochun Ye, Sizhong Hu, Chen Hao, Xiaohong Wang, Chengxiang Huang, Fangsheng Wu
Zeolitic imidazolate frameworks have stimulated great attention due to their potential applications in energy storage, catalysis, gas sensing, drug delivery etc. In this paper, the three-dimensional porous nanomaterial Co3O4/ZnCo2O4/CuO with hollow polyhedral nanocage structures and highly enhanced electrochemical performances was synthesized successfully by a zeolitic imidazolate framework-67 route. The composites hold the shape of the ZIF-67 templates well and the shell has multiple compositions. In the process, we first synthesized the nanostructure hydroxide precursors and then transformed them into the corresponding metal oxide composites by thermal annealing in air...
August 10, 2018: Nanoscale
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