Showing 1-30 of 155 results for "

131903

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Xiaoli Gu et al.
RSC advances, 5(52), 41377-41384 (2015-08-11)
Surface molecularly imprinted polymers (MIP@SBA-15) imprinted on the surface of hybrid nanostructured organic/inorganic materials (SBA-15) were prepared for the selective extraction and detection of baicalin (BA) from biological samples. The surface morphologies and characteristics of the imprinted and non-imprinted polymers...
Ángela A Beltrán-Osuna et al.
Langmuir : the ACS journal of surfaces and colloids, 28(25), 9700-9706 (2012-05-23)
In this work, a new antifouling silica hydrogel was developed for potential biomedical applications. A zwitterionic polymer, poly(carboxybetaine methacrylate) (pCBMA), was produced via atom-transfer radical polymerization and was appended to the hydrogel network in a two-step acid-base-catalyzed sol-gel process. The...
Yuan Liao et al.
ACS applied materials & interfaces, 6(18), 16035-16048 (2014-08-26)
With modest temperature demand, low operating pressure, and high solute rejection, membrane distillation (MD) is an attractive option for desalination, waste treatment, and food and pharmaceutical processing. However, large-scale practical applications of MD are still hindered by the absence of...
Lei Tan et al.
Journal of chromatography. A, 1411, 69-76 (2015-08-11)
The major challenges in measuring plasma renin activity (PRA) stem from the complexity of biological matrix, as well as from the instability and low circulating concentration of angiotensin. In this study, an ultra-high performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS) based...
Chao-Yan Zhang et al.
Journal of chromatography. A, 1383, 18-24 (2015-01-27)
Three Ag(I)-organic frameworks, [Ag5(pydc)2(CN)]n, {[Ag4(pydc)2]CH3CN}n, and [Ag(4,4'-bpy)NO3]n, were synthesized and embedded into silica gels to form metal-organic-framework (MOF)-embedded gels for the microextraction of polybrominated diphenyl ethers (PBDEs) in soils. Despite the great differences in the structures of the organic ligands...
O N Ponamoreva et al.
Biosensors & bioelectronics, 67, 321-326 (2014-09-10)
The methylotrophic Pichia angusta VKM Y-2559 and the oleaginous Cryptococcus curvatus VKM Y-3288 yeast cells were immobilized in a bimodal silica-organic sol-gel matrix comprised of tetraethoxysilane (TEOS), the hydrophobic additive methyltriethoxysilane (MTES) and the porogen polyethylene glycol (PEG). Under carefully...
Xuebin Ke et al.
Nanoscale research letters, 9(1), 2492-2492 (2015-06-20)
Metal-enhanced fluorescence (MEF) as a newly recognized technology has been attracting considerable attention and is widely used in fluorescence-based technology. In this paper, we reported a novel distance-dependent MEF and metal-enhanced singlet oxygen generation phenomenon based on silica-coated gold nanorods...
Xiao-Ming Zhu et al.
International journal of nanomedicine, 7, 953-964 (2012-03-07)
To compare the cellular uptake efficiency and cytotoxicity of aminosilane (SiO(2)-NH(2))-coated superparamagnetic iron oxide (SPIO@SiO(2)-NH(2)) nanoparticles with three other types of SPIO nanoparticles coated with SiO(2) (SPIO@SiO(2)), dextran (SPIO@dextran), or bare SPIO in mammalian cell lines. Four types of monodispersed...
Mamdoh R Mahmoud et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 91, 141-154 (2014-06-18)
A novel mesoporous silica-coated ferrocyanide (MSCFC) composite was successfully synthesized and evaluated as a dual-function material for simultaneous removal of (137)Cs(+) cations and (99)TcO4(-) anions from aqueous solutions. Sorption behavior of both radionuclides on MSCFC under different experimental conditions has...
Mehrdad Mohammadpour et al.
Cornea, 33(7), 738-743 (2014-06-03)
The aim of this study was to investigate transmission of topical silicate nanoparticles (SiNPs) through the corneal stroma, anterior chamber, and vitreous fluids by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and inductively coupled plasma atomic emission spectrometry (ICP-AES)...
Hayden Winter et al.
Nanomaterials (Basel, Switzerland), 10(8) (2020-07-30)
X-ray radiotherapy is a common method of treating cancerous tumors or other malignant lesions. The side effects of this treatment, however, can be deleterious to patient quality of life if critical tissues are affected. To potentially lower the effective doses...
Lei Zhou et al.
Nature communications, 6, 6938-6938 (2015-04-25)
The identification of potential diagnostic markers and target molecules among the plethora of tumour oncoproteins for cancer diagnosis requires facile technology that is capable of quantitatively analysing multiple biomarkers in tumour cells and tissues. Diagnostic and prognostic classifications of human...
Simonetta Rima et al.
Small (Weinheim an der Bergstrasse, Germany), 14(46), e1802854-e1802854 (2018-10-24)
In this work, amyloid fibrils are used as a template for the preparation of long silica fibers, with a variety of aspect ratios and surface roughness. Starting with β-lactoglobulin fibrils with typical diameters of about 20 nm and a length...
Lorenzo Fernandez et al.
Journal of molecular modeling, 18(7), 3301-3310 (2012-01-19)
Quantum chemical calculations using density functional theory have been carried out to investigate two chemical pathways for the last step of the hydrolysis of tetraethylorthosilicate (TEOS) in basic catalyzed environment. The two models that are introduced in this study depend...
Maofang He et al.
Talanta, 147, 437-444 (2015-11-26)
In this paper, iminodiacetic acid-Cu(II) functionalized Fe3O4@SiO2 magnetic nanoparticles were prepared and used as new adsorbents for magnetic solid phase extraction (MSPE) of six monoamine neurotransmitters (MNTs) from rabbit plasma. The selective enrichment of MNTs at pH 5.0 was motivated...
Juan F Illescas et al.
ACS applied materials & interfaces, 4(8), 4259-4269 (2012-07-19)
This article describes a sol-gel route for nanomaterials production, without volatile organic compounds (VOCs). These materials are simply obtained by mixing a silica oligomer with a non-ionic surfactant under ultrasonic agitation. The surfactant acts as sol-gel transition catalyst and also...
Jani Holopainen et al.
Nanotechnology, 26(2), 025301-025301 (2014-12-17)
A needleless electrospinning setup named 'Needleless Twisted Wire Electrospinning' was developed. The polymer solution is electrospun from the surface of a twisted wire set to a high voltage and collected on a cylindrical collector around the wire. Multiple Taylor cones...
Xiaole Zhang et al.
Journal of colloid and interface science, 448, 189-196 (2015-03-04)
In this work, a facile one-pot strategy was proposed for the synthesis of C18-functionalized core-shell magnetic mesoporous silica composite (Fe3O4/mSiO2-C18). The Fe3O4/mSiO2-C18 composite, with an average size of 80 nm and a functionalized mesoporous silica shell of about 30 nm...
Bhuvaneswari Koneru et al.
Molecules (Basel, Switzerland), 20(11), 19690-19698 (2015-11-04)
Tetracycline (TC) is a well-known broad spectrum antibiotic, which is effective against many Gram positive and Gram negative bacteria. Controlled release nanoparticle formulations of TC have been reported, and could be beneficial for application in the treatment of periodontitis and...
Wanyuan Gui et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 16(3), 607-613 (2014-12-11)
A pH-controlled delivery system based on mesoporous silica nanoparticles (MSNs) was constructed for dual-cargo selective release. To achieve a better controlled-release effect, a modified sol-gel method was employed to obtain MSNs with tunable particle and pore sizes. The systems selectively...
Jinlong Yang et al.
Lab on a chip, 19(7), 1296-1304 (2019-03-09)
Drop manipulation on hydrophobic surfaces is of importance in lab-on-a-chip applications. Recently, superhydrophobic surface-assisted lab-on-a-chips have attracted significant attention from researchers due to their advantages of contamination resistance and low adhesion between the drop and the surface during manipulation. However...
Yasuaki Tokudome et al.
Scientific reports, 2, 683-683 (2012-09-25)
Stimuli-response on hierarchically-structured surface wrinkles is required for advanced filtration, catalysis and sensing applications. Although conventional processes can form hierarchical surface wrinkles, incorporation of stimuli-responsive features has not been achieved, limiting the potential multi-scale functionality of wrinkles. Here, we demonstrate...
Soledad Cebrián-García et al.
Molecules (Basel, Switzerland), 23(9) (2018-09-12)
Alkyl esters are high added value products useful in a wide range of industrial sectors. A methodology based on a simple sol-gel approach (biosilicification) is herein proposed to encapsulate enzymes in order to design highly active and stable biocatalysts. Their...
Li Li et al.
Nanoscale research letters, 10(1), 445-445 (2015-11-19)
Moisture control is an important part of effective maintenance program for gas-insulated switchgear (GIS). Herein, hexagonal mesoporous silica (HMS) materials were synthesized by adopting dodecylamine as a structure directing agent, which was then employed as a host for supporting polyethylenimine...
Caitlyn M Gatley et al.
Molecules (Basel, Switzerland), 20(6), 9616-9639 (2015-05-29)
While H2O2 is a powerful oxidant, decomposing into environmentally benign H2O and O2, a catalyst is often required for reactions with H2O2 to proceed at synthetically useful rates. Organotellurium and organoselenium compounds catalyze the oxidation of halide salts to hypohalous...
Sathiamurthi Perumal et al.
Journal of the mechanical behavior of biomedical materials, 52, 131-138 (2015-04-30)
The success of a tissue engineering scaffold depends on a fine balance being achieved between the physicochemical and biological properties. This study attempts to understand the influence of silica concentration on the functional properties of collagen-silica (CS) composite scaffolds for...
Jiajia Yang et al.
Analytica chimica acta, 853, 311-319 (2014-12-04)
Bisphenol A (BPA) imprinted sponge mesoporous silica was synthesized using a combination of semi-covalent molecular imprinting and simple self-assembly process. The molecularly imprinted sponge mesoporous silica (MISMS) material obtained was characterized by FT-IR, scanning electron microscopy, transmission electron microscopy, and...
Lu Yangfang et al.
Electrophoresis, 36(17), 2120-2127 (2015-05-21)
Submicron, non-porous, chiral silica stationary phase has been prepared by the immobilization of functionalized β-CD derivatives to isocyanate-modified silica via chemical reaction and applied to the pressurized capillary electrochromatography (pCEC) enantio-separation of various chiral compounds. The submicron, non-porous, cyclodextrin-based chiral...
Xin Du et al.
Journal of colloid and interface science, 528, 379-388 (2018-06-06)
Mesoporous organosilica materials with organo-bridged silsesquioxane and novel structures have attracted great attention due to combined or enhanced properties. Here, we achieved facile synthesis of uniform well-defined mesoporous organosilica nanobowls with ethane- or ethane&thioether-bridged silsesquioxane framework by one-pot reaction. The...
Nils R Blumenthal et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(45), 16124-16129 (2014-10-29)
Extracellular soluble signals are known to play a critical role in maintaining neuronal function and homeostasis in the CNS. However, the CNS is also composed of extracellular matrix macromolecules and glia support cells, and the contribution of the physical attributes...