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Dominika Pawcenis et al.
Journal of chromatography. A, 1409, 53-59 (2015-07-27)
The study focuses on determination of a set of crucial parameters for molar mass calculation of cellulose from the results of size exclusion chromatography coupled with multiple angle laser light scattering (MALLS) and differential refractive index (DRI) detectors. In the
Pei-Pei Zhang et al.
Journal of Asian natural products research, 15(5), 466-472 (2013-04-26)
One new lignan (7S,8R,7'R,8'R)-7-(3,4-methylenedioxyphenyl)-8,8'-dimethyl-8'-hydroxyl-7'-methoxyl-7'-(3',4'-methylenedioxyphenyl)-tetrahydrofuran (1), one new sesquiterpene 2-hydroxy-11,12-dehydrocalamenene (2), one new natural product erythro-1-(3,4-dimethoxyphenyl)-4-(3,4-methylenedioxyphenyl)-2,3-dimethyl-butane (3), and two known lignans (+)-anwulignan(erythro-1-(4-hydroxy-3-methoxyphenyl)-4-(3,4-methylenedioxyphenyl)-2,3-dimethyl-butane) (4) and ( - )-zuonin-A (5) were isolated from the stems of Schisandra glaucescens Diels. Their structures were elucidated by spectroscopic
Mohammed J Farooqi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 153, 124-131 (2015-08-25)
Perylene diimide derivatives have attracted initial interest as industrial dyes. Recently, much attention has been focused on their strong π-π stacks resulting from the large PDI aromatic core. These PDI stacks have distinct optical properties, and provide informative models that
Sinéad Currivan et al.
Journal of chromatography. A, 1402, 82-93 (2015-05-30)
Zwitterionic methacrylate based polymeric monolithic columns were prepared in two-step polymerizations, with reduced polymerization times. Characteristic properties such as hydrodynamic permeability, porosity, retention factors, and pore size distribution charts were used for column evaluation. A scaffold column was fabricated by
A R Pereira et al.
Analytical and bioanalytical chemistry, 412(15), 3629-3637 (2020-04-03)
Histamine intolerance results from a disequilibrium of accumulated histamine and the capacity for histamine degradation. An impaired histamine degradation based on reduced DAO activity and the resulting histamine excess may cause numerous symptoms mimicking an allergic reaction. For that, the
H Breithaupt et al.
Journal of chromatography, 230(1), 97-105 (1982-06-11)
A high-performance liquid chromatographic method for the determination of the anti-arrhythmic drug mexiletine in human plasma, urine, and cerebrospinal fluid is described. Following extraction with diethyl ether, mexiletine and the internal standard 4-methylmexiletine were derivatized with 2,4-dinitrofluorobenzene. Analyses were performed
Hyo Jin Kang et al.
Biosensors & bioelectronics, 67, 413-418 (2014-09-15)
Caspase-3 is an apoptotic cysteine protease and its aberrancy is highly implicated to numerous diseases thereby rendering caspase-3 activity as an important disease marker. Most caspase-3 sensors are caspase-3 substrates of which the fluorescence signals are turned on upon catalytic
Ji Min Kim et al.
Analytica chimica acta, 877, 1-8 (2015-05-24)
The use of polyanion and polycation-sensitive membrane electrodes to detect five different preparations of fucoidan is described. Unlike linear polyanionic molecules previously measured with polymer membrane-based electrochemical sensors, fucoidans from marine brown algae are all highly branched, sulfated polysaccharides with
Igor Otavio Minatel et al.
Journal of medicinal food, 17(10), 1134-1141 (2014-08-28)
Bioactive components in rice vary depending on the variety and growing condition. Fat-soluble components such as γ-oryzanol, tocopherols, tocotrienols, carotenoids, and fatty acids were analyzed in brown, sugary brown, red, and black rice varieties using established high-performance liquid chromatography (HPLC)
Daniel T Bowers et al.
ACS nano, 8(12), 12080-12091 (2014-11-27)
Oxygenation in tissue scaffolds continues to be a limiting factor in regenerative medicine despite efforts to induce neovascularization or to use oxygen-generating materials. Unfortunately, many established methods to measure oxygen concentration, such as using electrodes, require mechanical disturbance of the
Ahlam Alalwiat et al.
The Analyst, 140(22), 7550-7564 (2015-10-16)
A multidimensional mass spectrometry (MS) methodology is introduced for the molecular level characterization of polymer-peptide (or polymer-protein) copolymers that cannot be crystallized or chromatographically purified. It encompasses electrospray ionization (ESI) or matrix-assisted laser desorption ionization (MALDI) coupled with mass analysis
Tomáš Řezanka et al.
Phytochemistry, 104, 95-104 (2014-05-17)
Structured triacylglycerols (TAGs) were isolated from nine cultivated strains of microalgae belonging to different taxonomic groups, i.e. Audouinella eugena, Balbiania investiens, Myrmecia bisecta, Nannochloropsis limnetica, Palmodictyon varium, Phaeodactylum tricornutum, Pseudochantransia sp., Thorea ramosissima, and Trachydiscus minutus. They were separated and
Sonika Batra et al.
Biomedical chromatography : BMC, 28(6), 815-825 (2014-05-28)
Enantiomeric separation of racemic mexiletine and fluoxetine was achieved using three chiral derivatizing reagents (CDRs) based on (S)-naproxen. Diastereomers were synthesized by reaction of mexiletine or fluoxetine with the CDRs and were separated on a C18 column under reversed-phase conditions
Ahmad Aqel et al.
Journal of chromatographic science, 52(3), 201-210 (2013-02-21)
This paper describes the comprehensive fabrication of monolithic materials for use as stationary phases in capillary liquid chromatography. Several columns were synthesized in the confines of 320 µm i.d. fused-silica capillaries by single-step in situ copolymerization of benzyl methacrylate and
Farzaneh Azadimanesh et al.
Carbohydrate polymers, 130, 316-324 (2015-06-17)
Cellulose triacetate (CTA) plasticization with 25 wt% glycerin (GLY), triethyl citrate (TEC) or dioctyl phthalate (DOP) enhanced its crystalline content as much as 55%, while only 10% crystalline content increase noticed using poly (ethylene glycol) (PEG). In addition, GLY and
John R Hornick et al.
Journal of experimental & clinical cancer research : CR, 31, 41-41 (2012-05-04)
Sigma-2 receptor ligands have been studied for treatment of pancreatic cancer because they are preferentially internalized by proliferating cells and induce apoptosis. This mechanism of apoptosis is poorly understood, with varying reports of caspase-3 dependence. We evaluated multiple sigma-2 receptor
P R Sarika et al.
Colloids and surfaces. B, Biointerfaces, 133, 347-355 (2015-07-03)
Galactosylated pullulan-curcumin conjugate (LANH2-Pu Ald-Cur SA) is developed for target specific delivery of curcumin to hepatocarcinoma cells by five step synthetic strategy, which includes oxidation of pullulan (Pu Ald), introduction of amino group to the targeting ligand (LANH2), grafting of
Huihui Ti et al.
Food chemistry, 178, 186-194 (2015-02-24)
The phytochemical profile and antioxidant activities of unprocessed and extruded milled fractions of black rice were investigated. Extrusion increased the free phenolics, anthocyanins and oxygen radical absorbance capacity (ORAC) and decreased the bound forms. The total phenolics, anthocyanins and ORAC
Mathias Devreese et al.
Journal of chromatography. A, 1353, 106-113 (2014-03-25)
A specific and sensitive LC-MS/MS method was developed for quantitative determination of closantel in bovine and ovine colostrum and tank milk. Sample preparation consisted of extracting milk samples with acetonitrile/acetone (80/20, v/v) followed by SPE clean-up with Oasis mixed anion
Tarick J El-Baba et al.
Rapid communications in mass spectrometry : RCM, 28(11), 1175-1184 (2014-04-25)
New inlet and vacuum ionization methods provide advantages of specificity, simplicity and speed for the analysis of synthetic polymers and polymer additives directly from surfaces such as fibers using mass spectrometry (MS) on different commercial mass spectrometers (Waters SYNAPT G2
Fangfang Chu et al.
Langmuir : the ACS journal of surfaces and colloids, 31(22), 5992-6000 (2015-01-31)
We study the structure and viscoelastic behavior of 3D plastic crystals of colloidal dumbbells in an oscillatory shear field based on a combination of small-angle neutron scattering experiments under shear (rheo-SANS) and Brownian dynamics computer simulations. Sterically stabilized dumbbell-shaped microgels
Filipa Alves et al.
Journal of chromatography. A, 1412, 112-125 (2015-08-26)
The currently most successful type of porous polymer monoliths utilized in chromatography is prepared by free-radical cross-linking (co)polymerization in porogenic solvents and a single-step molding process. Though such types of materials are well-recognized in the scientific community, they suffer from
Timothy Plett et al.
Nanoscale, 7(45), 19080-19091 (2015-11-03)
Nanopores have become a model system to understand transport properties at the nanoscale. We report experiments and modeling of ionic current in aprotic solvents with different dipole moments through conically shaped nanopores in a polycarbonate film and through glass nanopipettes.
Maximilian A Zieringer et al.
Small (Weinheim an der Bergstrasse, Germany), 11(24), 2903-2909 (2015-02-19)
Prevention of undesired leakage of encapsulated materials prior to triggered release presents a technological challenge for the practical application of microcapsule technologies in agriculture, drug delivery, and cosmetics. A microfluidic approach is reported to fabricate perfluoropolyether (PFPE)-based microcapsules with a
Daewoo Suh et al.
Nature communications, 11(1), 2252-2252 (2020-05-10)
Healable conductive materials have received considerable attention. However, their practical applications are impeded by low electrical conductivity and irreversible degradation after breaking/healing cycles. Here we report a highly conductive completely reversible electron tunneling-assisted percolation network of silver nanosatellite particles for
Shigeo Hayashi et al.
Journal of enzyme inhibition and medicinal chemistry, 29(6), 846-867 (2014-02-13)
Because of the pivotal role of cyclooxygenase (COX) in the inflammatory processes, non-steroidal anti-inflammatory drugs (NSAIDs) that suppress COX activities have been used clinically for the treatment of inflammatory diseases/syndromes; however, traditional NSAIDs exhibit serious side-effects such as gastrointestinal damage
Kazunori Shimomura et al.
Tissue engineering. Part A, 21(13-14), 2066-2075 (2015-03-31)
Radial tears of the meniscus represent one of the most common injuries of the knee, and result in loss of biomechanical meniscal function. However, there have been no established, effective treatments for radial meniscal tears. Nanofibrous materials produced by electrospinning
Satoru Matsukawa et al.
Molecules (Basel, Switzerland), 20(10), 18482-18495 (2015-10-17)
The ring-opening of N-tosylaziridines with various acid anhydrides catalyzed by 5 mol % of 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) afforded the corresponding β-amino esters in excellent yields under mild reaction conditions. Polymer-supported catalyst, PS-TBD also acts as a good catalyst for this reaction.
Daniela Reischl et al.
Crystal growth & design, 15(9), 4687-4693 (2015-09-15)
Polymorphism and morphology can represent key factors tremendously limiting the bioavailability of active pharmaceutical ingredients (API), in particular, due to solubility issues. Within this work, the generation of a yet unknown surface-induced polymorph (SIP) of the model drug, 5,5-diphenylimidazolidin-2,4-dion (phenytoin)
Ibtissam Talhaoui et al.
Nucleic acids research, 42(10), 6300-6313 (2014-04-03)
The human thymine-DNA glycosylase (TDG) initiates the base excision repair (BER) pathway to remove spontaneous and induced DNA base damage. It was first biochemically characterized for its ability to remove T mispaired with G in CpG context. TDG is involved
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