搜索范围

186562

应用筛选条件

关键词:'186562'

显示 31-60 #N/A 521 条结果关于 "186562" 范围论文

Mesoporous titania thin films as efficient enzyme carriers for paraoxon determination/detoxification: effects of enzyme binding and pore hierarchy on the biocatalyst activity and reusability.

N Frančič et al.

The Analyst, 139(12), 3127-3136 (2014-05-03)

In this work we demonstrate the efficient immobilization of histidine 6-tagged organophosphate hydrolase (His6-OPH), an organophosphate-degrading enzyme, on mesoporous titania thin films. This permits the use of the biocatalyst films as efficient tools in the detection/detoxification of paraoxon. His6-OPH was

Encapsulation of fish oil with N-stearoyl O-butylglyceryl chitosan using membrane and ultrasonic emulsification processes.

Sudipta Chatterjee et al.

Carbohydrate polymers, 123, 432-442 (2015-04-07)

Fish oil-loaded microcapsules were prepared from oil-in-water emulsions using N-stearoyl O-butylglyceryl chitosan as shell material. The emulsions were prepared by both membrane and ultrasonic emulsification processes under variable conditions to examine the effect of the emulsification process and encapsulation conditions

Use of re-esterified oils, differing in their degree of saturation and molecular structure, in broiler chicken diets.

E Vilarrasa et al.

Poultry science, 94(7), 1527-1538 (2015-03-17)

The aim of the present study was to investigate the potential use of re-esterified oils, differing in their degree of saturation and molecular structure, in comparison with their corresponding acid and native oils in broiler chicken diets. For this purpose

Towards the chiral metabolomics: Liquid chromatography-mass spectrometry based DL-amino acid analysis after labeling with a new chiral reagent, (S)-2,5-dioxopyrrolidin-1-yl-1-(4,6-dimethoxy-1,3,5-triazin-2-yl)pyrrolidine-2-carboxylate, and the application to saliva of healthy volunteers.

Toshiki Mochizuki et al.

Analytica chimica acta, 875, 73-82 (2015-05-06)

A novel triazine-type chiral derivatization reagent, i.e., (S)-2,5-dioxopyrrolidin-1-yl-1-(4,6-dimethoxy-1,3,5-triazin-2-yl) pyrrolidine-2-carboxylate (DMT-(S)-Pro-OSu), was developed for the highly sensitive and selective detection of chiral amines and amino acids by UPLC-MS/MS analysis. The enantiomers of amino acids were easily labeled with the reagents at

Notch activation in the mouse mammary luminal lineage leads to ductal hyperplasia and altered partitioning of luminal cell subtypes.

Yee Peng Phoon et al.

Experimental cell research, 395(1), 112156-112156 (2020-07-25)

Hyperactivated Notch signalling has been implicated in breast cancer, but how elevated levels of Notch signalling contribute to mammary dysplasia and tumorigenesis is not fully understood. In this study, we express an activated form of Notch1 in the mouse mammary

Polyhedral clathrate hydrates. X. Structure of the double hydrate of tetrahydrofuran and hydrogen sulfide.

Mak TCW, et al.

J. Chem. Phys. , 42(8), 2732-2737 (1965)

Three-dimensional imaging of solvent-cleared organs using 3DISCO.

Ali Ertürk et al.

Nature protocols, 7(11), 1983-1995 (2012-10-13)

The examination of tissue histology by light microscopy is a fundamental tool for investigating the structure and function of organs under normal and disease states. Many current techniques for tissue sectioning, imaging and analysis are time-consuming, and they present major

Ring Opening Reactions through C-O Bond Cleavage Uniquely Adding Chemical Functionality to Boron Subphthalocyanine.

Catherine Bonnier et al.

Molecules (Basel, Switzerland), 20(10), 18237-18245 (2015-10-13)

We are reporting the unexpected reaction between bromo-boron subphthalocyanine (Br-BsubPc) and THF, 1,4-dioxane or γ-butyrolactone that results in the ring opening of the solvent and its addition into the BsubPc moiety. Under heating, the endocyclic C-O bond of the solvent

An efficient method for the immobilization of inulinase using new types of polymers containing epoxy groups.

Mariusz Trytek et al.

Journal of industrial microbiology & biotechnology, 42(7), 985-996 (2015-04-22)

New glycidyl methacrylate copolymers containing different numbers of epoxy groups were synthesized and used to develop effective procedures for inulinase immobilization. The beneficial characteristics of the carriers included a high degree of crosslinking, stability at ambient temperature, an appropriate surface

Thin-Layer Chemical Modulations by a Combined Selective Proton Pump and pH Probe for Direct Alkalinity Detection.

Majid Ghahraman Afshar et al.

Angewandte Chemie (International ed. in English), 54(28), 8110-8113 (2015-05-28)

We report a general concept based on a selective electrochemical ion pump used for creating concentration perturbations in thin layer samples (∼40 μL). As a first example, hydrogen ions are released from a selective polymeric membrane (proton pump) and the resulting

Asymmetric flow field-flow fractionation coupled to inductively coupled plasma mass spectrometry for the quantification of quantum dots bioconjugation efficiency.

Mario Menéndez-Miranda et al.

Journal of chromatography. A, 1422, 247-252 (2015-10-24)

Hyphenation of asymmetric flow field-flow fractionation (AF4) to an on-line elemental detection (inductively coupled plasma-mass spectrometry, ICP-MS) is proposed as a powerful diagnostic tool for quantum dots bioconjugation studies. In particular, conjugation effectiveness between a "model" monoclonal IgG antibody (Ab)

A chitosan-Au-hyperbranched polyester nanoparticles-based antifouling immunosensor for sensitive detection of carcinoembryonic antigen.

Chong Sun et al.

The Analyst, 139(17), 4216-4222 (2014-06-25)

Analysts are always interested in finding new functional nanomaterials and devices with good properties for electrochemical sensor applications. In this paper, hyperbranched polyester nanoparticles with carboxylic acid functional groups (HBPE-CA NPs) were synthesized and combined with chitosan wrapped around Au

A Functional Group Approach for Prediction of APPI Response of Organic Synthetic Targets.

Konstantin O Zhurov et al.

Journal of the American Society for Mass Spectrometry, 26(7), 1221-1232 (2015-04-22)

Atmospheric pressure photoionization (APPI) is a technique of choice for ionization of non-polar molecules in mass spectrometry (MS). Reported APPI-based studies tend to focus on a selected compound class, which may contain a variety of functional groups. These studies demonstrate

Extracellular matrix deposition of bone marrow stroma enhanced by macromolecular crowding.

Marina C Prewitz et al.

Biomaterials, 73, 60-69 (2015-09-24)

Decellularized extracellular matrices (ECM) from in vitro cell cultures can serve as in vivo-like matrix scaffolds for modulating cell-ECM interactions. Macromolecular crowding (MMC), the supplementation of synthetic or naturally occurring molecules resulting in excluded volume effects (EVE), has been demonstrated

Construction of porous cationic frameworks by crosslinking polyhedral oligomeric silsesquioxane units with N-heterocyclic linkers.

Guojian Chen et al.

Scientific reports, 5, 11236-11236 (2015-06-13)

In fields of materials science and chemistry, ionic-type porous materials attract increasing attention due to significant ion-exchanging capacity for accessing diversified applications. Facing the fact that porous cationic materials with robust and stable frameworks are very rare, novel tactics that

Deposition of wafer-scale single-component and binary nanocrystal superlattice thin films via dip-coating.

E Ashley Gaulding et al.

Advanced materials (Deerfield Beach, Fla.), 27(18), 2846-2851 (2015-03-31)

Photopatterning of cross-linkable epoxide-functionalized block copolymers and dual-tone nanostructure development for fabrication across the nano- and microscales.

Chunlin He et al.

Small (Weinheim an der Bergstrasse, Germany), 11(20), 2407-2416 (2015-01-23)

The self-assembly of block copolymers in thin films provides an attractive approach to patterning 5-100 nm structures. Cross-linking and photopatterning of the self-assembled block copolymer morphologies provide further opportunities to structure such materials for lithographic applications, and to also enhance

Highly sensitive Fe₃O₄ nanobeads/graphene-based molecularly imprinted electrochemical sensor for 17β-estradiol in water.

Ying Li et al.

Analytica chimica acta, 884, 106-113 (2015-06-16)

A novel molecularly imprinted electrochemical sensor based on Fe3O4 nanobeads immobilized on graphene (Fe3O4-MIP@RGO) has been developed for detecting 17β-estradiol (17β-E2) in water using reversible addition fragmentation chain transfer (RAFT) polymerization technique. 17β-E2 can be detected by this electrochemical sensor

Modification of chemical and conformational properties of natural organic matter by click chemistry as revealed by ESI-Orbitrap mass spectrometry.

Antonio Nebbioso et al.

Analytical and bioanalytical chemistry, 407(28), 8515-8523 (2015-09-14)

A click reaction is reported here for the first time as a useful technique to control the conformational stability of natural organic matter (NOM) suprastructures. Click conjugates were successfully formed between a previously butynylated NOM hydrophobic fraction and a hydrophilic

Tumor-preferential sustained drug release enhances antitumor activity of block copolymer micelles.

Andrei Ponta et al.

Journal of drug targeting, 22(7), 619-628 (2014-04-29)

Nanoparticles are widely used as drug carriers for controlled, tumor-targeted delivery of various anticancer agents that have biopharmaceutical limitations such as water solubility and tissue permeability. Growing evidence suggests that nanoparticles not only reduce toxic side effects of anticancer drugs

Expanded corn starch as a versatile material in atom transfer radical polymerization (ATRP) of styrene and methyl methacrylate.

Ankushi Bansal et al.

Carbohydrate polymers, 130, 290-298 (2015-06-17)

Polymerization of styrene (St) and methyl methacrylate (MMA) was performed by surface initiated (SI) and activator generated by electron transfer (AGET) systems of atom transfer radical polymerization (ATRP) using renewable expanded corn starch (ECS) as a support. This prepared ECS

Taiwanin A incorporated polyurethane fiber sheets for prevention of postoperative cancer recurrence.

Onon Batnyam et al.

Journal of biomaterials science. Polymer edition, 26(9), 558-571 (2015-06-03)

In this study, we propose a single solution for prevention of postoperative complications and recurrence of highly metastatic gastrointestinal tract cancers. Here, we demonstrate preparation and characterization of Taiwanin A incorporated polyurethane fiber sheets with excellent mechanical properties and sustained

Photolithographic Synthesis of High-Density DNA and RNA Arrays on Flexible, Transparent, and Easily Subdivided Plastic Substrates.

Matthew T Holden et al.

Analytical chemistry, 87(22), 11420-11428 (2015-10-24)

The photolithographic fabrication of high-density DNA and RNA arrays on flexible and transparent plastic substrates is reported. The substrates are thin sheets of poly(ethylene terephthalate) (PET) coated with cross-linked polymer multilayers that present hydroxyl groups suitable for conventional phosphoramidite-based nucleic

Synthesis, Characterization and Thermal Decomposition Kinetics of a Novel Benzofuran Ketoxime Derived Polymer.

Zehra Bolat et al.

Acta chimica Slovenica, 62(2), 428-436 (2015-06-19)

A novel benzofuran ketoxime derived polymer, poly(benzofuran-2-yl-methylketoxime-O-methacrylate) [poly(BMKMA], was firstly synthesized by free radical polymerization method. Its thermal degradation studies were performed by thermogravimetric analysis (TGA) in order to determine the actual reaction mechanisms of the decomposition process. The activation

Method development and optimization on cinchona and chiral sulfonic acid-based zwitterionic stationary phases for enantiomer separations of free amino acids by high-performance liquid chromatography.

Tong Zhang et al.

Journal of chromatography. A, 1363, 191-199 (2014-06-26)

CHIRALPAK ZWIX(+) and ZWIX(-) are cinchona alkaloid-derived zwitterionic chiral stationary phases (CSPs) containing a chiral sulfonic acid motif which serves as negatively charged interaction site. They are versatile for direct enantiomer resolution of amino acids and many other ampholytic compounds

Photoswitching a molecular catalyst to regulate CO2 hydrogenation.

Nilusha Priyadarshani et al.

Dalton transactions (Cambridge, England : 2003), 44(33), 14854-14864 (2015-08-01)

Inspired by nature's ability to regulate catalysis using physiological stimuli, azobenzene was incorporated into Rh(bis)diphosphine CO2 hydrogenation catalysts to photoinitiate structural changes to modulate the resulting catalytic activity. The rhodium bound diphosphine ligands (P(Ph2)-CH2-N(R)-CH2-P(Ph2)) contain the terminal amine of a

Tailoring the degradation rates of thermally responsive hydrogels designed for soft tissue injection by varying the autocatalytic potential.

Yang Zhu et al.

Biomaterials, 53, 484-493 (2015-04-22)

The ability to modulate the degradation properties of biomaterials such as thermally responsive hydrogels is desirable when exploring new therapeutic strategies that rely on the temporary presence of a placed scaffold or gel. Here we report a method of manipulating

Dispersion of titanate nanotubes for nanomedicine: comparison of PEI and PEG nanohybrids.

Anne-Laure Papa et al.

Dalton transactions (Cambridge, England : 2003), 44(2), 739-746 (2014-11-20)

In the present study, we report the dispersion of titanate nanotubes (TiONts) via polymer grafting (PolyEthylene Glycol, PEG) or polymer adsorption (polyethylene imine, PEI) where different TiONts/polymer ratios have been investigated. The TiONts/PEI and TiONts/PEG nanohybrids were characterized by scanning

Au-Ag core-shell nanoparticle array by block copolymer lithography for synergistic broadband plasmonic properties.

Seung Keun Cha et al.

ACS nano, 9(5), 5536-5543 (2015-04-22)

Localized surface plasmon resonance of metallic nanostructures receives noticeable attention in photonics, electronics, catalysis, and so on. Core-shell nanostructures are particularly attractive due to the versatile tunability of plasmonic properties along with the independent control of core size, shell thickness

Design, synthesis, and evaluation of NO-donor containing carbonic anhydrase inhibitors to lower intraocular pressure.

Qinhua Huang et al.

Journal of medicinal chemistry, 58(6), 2821-2833 (2015-03-03)

The antiglaucoma drugs dorzolamide (1) and brinzolamide (2) lower intraocular pressure (IOP) by inhibiting the carbonic anhydrase (CA) enzyme to reduce aqueous humor production. The introduction of a nitric oxide (NO) donor into the alkyl side chain of dorzolamide (1)

2/18