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Myles Sedgwick et al.
Journal of the American Chemical Society, 134(29), 11904-11907 (2012-07-07)
The dramatic impact of differing environments on proton transfer dynamics of the photoacid HPTS prompted us to investigate these systems with two highly complementary methods: ultrafast time-resolved transient absorption and two-dimensional NMR spectroscopies. Both ultrafast time-resolved transient absorption spectroscopy and
Mehdi Hoseini et al.
Journal of fluorescence, 30(3), 665-677 (2020-04-28)
Encapsulation of crocin (CN), having large nonlinear optical (NLO) properties, can be utilized in studies of photodynamic therapy (PDT). For this purpose, photo-physical and NLO properties of CN encapsulation with and without cell culture medium (CCM) were investigated. As well
Sharad B Murdande et al.
Journal of pharmaceutical sciences, 104(6), 2094-2102 (2015-03-31)
The quantitative determination of solubility and the initial dissolution rate enhancement of crystalline nanoparticles were critically investigated using a separation-based approach (ultracentrifugation and filtration). Four poorly soluble model compounds (griseofulvin, celecoxib, compound-X, and fenofibrate) were used in this investigation. The
Jerry Nesamony et al.
Drug development and industrial pharmacy, 39(2), 240-251 (2012-04-07)
Water-in-oil microemulsions (w/o ME) are ideal for parenteral drug delivery. However, no such formulations have been tested for biocompatibility in in vitro cell cultures. Furthermore, sterilization of w/o MEs is a challenging process that has not been previously developed and
Gabriela V Porcal et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 11(2), 302-308 (2011-11-23)
The photophysics of Safranine-O (3,6-diamino-2,7-dimethyl-5 phenyl phenazinium chloride) (SfH(+)Cl(-)) was investigated in reverse micelles (RMs) of AOT (sodium bis(2-ethylhexyl)sulfosuccinate) with special emphasis on the triplet state processes. The triplet is formed in its monoprotonated form, independently of the pH of
Komal Sethi et al.
Journal of colloid and interface science, 456, 59-65 (2015-06-21)
In this paper, we report the synthesis, characterization of drug-doped organically modified titania nanoparticles, and their applications in sustained drug release. The drug-doped nanoparticles were synthesized in the hydrophobic core of oil-in-water microemulsion medium. Structural aspects obtained through TEM and
O Fernando Silva et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 13(1), 124-130 (2011-11-19)
We found that the absorption spectra of 2-acetylphenol (2-HAP), 4-acetylphenol (4-HAP), and p-nitrophenol (p-NPh) in water/sodium 1,4-bis(2-ethylhexyl)sulfosuccinate (AOT)/n-heptane reverse micelles (RMs) at various W(0) (W(0) = [H(2)O]/[surfactant]) values studied changed with time if (-)OH ions were present in the RM
Gregory N Smith et al.
Langmuir : the ACS journal of surfaces and colloids, 29(10), 3252-3258 (2013-02-16)
The concentration-dependent aggregation of two surfactants, anionic sodium dioctylsulfosuccinate (Aerosol OT or AOT) and nonionic pentaethylene glycol monododecyl ether (C12E5), has been studied in cyclohexane-D12 using small-angle neutron scattering (SANS). A clear monomer-to-aggregate transition has been observed for both surfactants
Johnson Mathew et al.
Journal of chromatography. A, 1231, 46-51 (2012-03-01)
Dioctyl sulfosuccinate (DOSS) was a major component of the dispersants most used in the 2010 Deepwater Horizon Oil Spill incident response. This analytical method quantifies salt water DOSS concentrations to a reporting limit of 20 μg/L, which was below the
Yong-Ze Song et al.
PloS one, 10(11), e0142149-e0142149 (2015-11-06)
Particulate matter with an aerodynamic diameter <2.5 μm (PM2.5) represents a severe environmental problem and is of negative impact on human health. Xi'an City, with a population of 6.5 million, is among the highest concentrations of PM2.5 in China. In
Masaharu Ueno
Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan, 131(12), 1765-1779 (2011-12-02)
The world constructed by self-organization of some amphiphils was discussed on the basis of micelle formation, vesicle formation, and oriented-nano-wire formation. First, the micelle formation of a both water- and oil- soluble surfactant, Aerosol OT, was discussed. Solution states of
Pierre Paré et al.
Canadian journal of gastroenterology & hepatology, 28(10), 549-557 (2014-11-13)
Constipation is an uncomfortable and common condition that affects many, irrespective of age. Since 1500 BC and before, health care practitioners have provided treatments and prevention strategies to patients for chronic constipation despite the significant variation in both medical and
Giovanna Longhi et al.
Physical chemistry chemical physics : PCCP, 13(48), 21423-21431 (2011-11-04)
Positively charged supramolecular aggregates formed in vacuo by n AOTNa (sodium bis(2-ethylhexyl)sulfosuccinate) molecules and n(c) additional sodium ions, i.e. [AOT(n)Na(n+n(c))](n(c)), have been investigated by molecular dynamics (MD) simulations for n = 1-20 and n(c) = 0-5. Statistical analysis of physical
Sonali V Kapse et al.
International journal of pharmaceutics, 429(1-2), 104-112 (2012-03-15)
We disclose a self nanoprecipitating preconcentrate (SNP) of tamoxifen citrate (TMX), which forms TMX loaded polymeric nanoparticles, on dilution with aqueous media. SNP comprised TMX, polymer (Kollidon SR) and surfactant/s dissolved in a pharmaceutically acceptable vehicle. Binary surfactant mixtures of
Silvina S Quintana et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 13(1), 115-123 (2011-12-03)
The water/sodium bis(2-ethylhexyl) phosphate (NaDEHP) reverse micelle (RM) system is revisited by using, for the first time, molecular probes to investigate interface properties. The solvatochromic behavior of 1-methyl-8-oxyquinolinium betaine (QB) and 6-propionyl-2-(N,N-dimethyl)aminonaphthalene (PRODAN) in the water/NaDEHP/toluene system is studied, and
Sławomir Oszwałdowski et al.
Journal of chromatography. A, 1412, 139-150 (2015-08-25)
Capillary electrophoresis coupled with contactless conductivity detector was applied to characterize BGE/segment/segment/BGE and BGE/segment/electrolyte/segment/BGE systems, where segment is the phase of mixed micelles migrating surrounded by BGE and composition of the first segment≠second segment. It was established that both systems
Protein bioactivity and polymer orientation is affected by stabilizer incorporation for double-walled microspheres
Kokai, L., et al.
J. Controlled Release, 141, 9-9 (2010)
Anju Gupta et al.
Marine pollution bulletin, 87(1-2), 164-170 (2014-08-31)
Adsorption of suspended particles to the interface of surfactant-dispersed oil droplets can alter emulsion phase and sedimentation behavior. This work examines the effects of model mineral aggregates (silica nanoparticle aggregates or SNAs) on the behavior of oil (octane)-water emulsions prepared
Catalina Sandoval et al.
PloS one, 10(4), e0123669-e0123669 (2015-04-24)
Reactors found in nature can be described as micro-heterogeneous systems, where media involved in each micro-environment can behave in a markedly different way compared with the properties of the bulk solution. The presence of water molecules in micro-organized assemblies is
S M Kelleher et al.
Nanotechnology, 26(36), 365703-365703 (2015-08-22)
This paper describes the fabrication of oligonucleotide-coated Cy5-doped silica nanoparticles using a combination of multivalent linkers and their use in surface-based DNA sandwich hybridization assays. Dipodal silane is introduced as a means to fabricate amine-coated silica nanoparticles and its advantages
Kellie A Woll et al.
Chemistry & biodiversity, 8(12), 2195-2210 (2011-12-14)
The interaction of amphiphilic molecules such as lipids and surfactants with the hydrophilic drug carboplatin was investigated to identify suitable self-assembling components for a potential gel-based delivery formulation. (1) H-NMR Studies in sodium bis(2-ethylhexyl) sulfosuccinate (aerosol-OT, AOT)-based reverse micelles show
D Das et al.
Langmuir : the ACS journal of surfaces and colloids, 28(45), 15762-15769 (2012-10-18)
The dependence of critical micelle concentration (cmc) of sodium dioctylsulfosuccinate (AOT) on the amount of ethylene glycol (EG) in water + EG medium was reported to be unusual and different from that of other surfactants to the extent that the
Mukesh K Sharma et al.
Biosensors & bioelectronics, 74, 299-304 (2015-07-08)
Bacillus anthracis is a bioterrorism agent classified by the Centers for Disease Control and Prevention (CDC). Herein, a novel electrochemical immunosensor for the sensitive, specific and easy detection of anthrax protective antigen (PA) toxin in picogram concentration was developed. The
Grzegorz Kiełbowicz et al.
Talanta, 141, 137-142 (2015-05-13)
A new method for the positional analysis of egg yolk phospholipids (PLs) (phosphatidylcholine-PC, phosphatidylethanolamine-PE) using liquid chromatography with charge aerosol detector (CAD) is described. The method is based on six-step procedure: 1) extraction of phospholipids from tissue sample, 2) separation
Avijit Paul et al.
Nanoscale research letters, 10, 140-140 (2015-04-09)
With advancements in nanotechnology, silver has been engineered into a nanometre size and has attracted great research interest for use in the treatment of wounds. Silver nanoparticles (AgNPs) have emerged as a potential alternative to conventional antibiotics because of their
Ashima Malik et al.
The journal of physical chemistry. B, 116(43), 12895-12904 (2012-10-03)
Crowding and confinement have often been used synonymously with regard to their effect on the structure and dynamics of proteins. In this work, we have investigated the unfolding of the protein myoglobin (Mb) entrapped in the confinement of the water
Mariana Bulgarella et al.
Ecology and evolution, 5(17), 3695-3703 (2015-09-19)
Parasite host range can be influenced by physiological, behavioral, and ecological factors. Combining data sets on host-parasite associations with phylogenetic information of the hosts and the parasites involved can generate evolutionary hypotheses about the selective forces shaping host range. Here
Rongfeng Yuan et al.
The journal of physical chemistry. B, 119(42), 13407-13415 (2015-10-06)
The dynamic nature of hydrogen bonding between a molecular anion, selenocyanate (SeCN(-)), and water in aqueous solution (D2O) is addressed using FT-IR spectroscopy, two-dimensional infrared (2D IR) vibrational echo spectroscopy, and polarization selective IR pump-probe (PSPP) experiments performed on the
Tamás Bánsági et al.
Physical review. E, Statistical, nonlinear, and soft matter physics, 86(4 Pt 2), 045202-045202 (2012-12-12)
We observe standing waves of chemical concentration in thin layers [quasi-two-dimensional (2D)] and capillaries [three-dimensional (3D)] containing the aqueous Belousov-Zhabotinsky reaction in a reverse microemulsion stabilized by the ionic surfactant sodium bis-2-ethylhexyl sulfosuccinate (AOT) and with cyclo-octane as the continuous
Y H Kim et al.
Analytica chimica acta, 883, 32-36 (2015-06-20)
A unique laser-induced fluorescence (LIF) reader equipped with a turbidimetric system was developed for a sandwich-type immunoassay using nanoparticles. The system was specifically designed to reduce experimental error caused by particle loss, aggregation and sinking, and to improve analytical performance
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