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Publications

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Current publications

Biochemical analysis of TssK, a core component of the bacterial Type VI secretion system, reveals distinct oligomeric states of TssK and identifies a TssK-TssFG subcomplex

Gram-negative bacteria use the Type VI secretion system (T6SS) to inject toxic proteins into rival bacteria or eukaryotic cells. However, the mechanism of the T6SS is incompletely understood. In the present study, we investigated a conserved component of the T6SS, TssK, using the antibacter ... more

Early and late HIV-1 membrane fusion events are impaired by sphinganine lipidated peptides that target the fusion site

Lipid-conjugated peptides have advanced the understanding of membrane protein functions and the roles of lipids in the membrane milieu. These lipopeptides modulate various biological systems such as viral fusion. A single function has been suggested for the lipid, binding to the membrane an ... more

The determination of V and Mo by dispersive liquid-liquid microextraction (DLLME) combined with laser-induced breakdown spectroscopy (LIBS)

Laser-induced breakdown spectrometry (LIBS) is a promising analytical technique with well-known advantages and limitations. However, despite its growing popularity, this technique has been applied mainly to solid samples and there have been a smaller number of studies devoted to liquid samp ... more

Gd-Al co-doped mesoporous silica nanoparticles loaded with Ru(bpy)32+ as a dual-modality probe for fluorescence and magnetic resonance imaging

Mesoporous silica nanoparticles (MSNs) were co-doped with Gd3+ and Al3+ and then loaded with Ru(bpy)32+ by ion-exchange to prepare Ru/Gd-Al@MSNs. The as-prepared Ru/Gd-Al@MSNs were applied as contrast agents for in vivo fluorescence and magnetic resonance (MR) dual-modality imaging with the ... more

Cyano-bridged copper(II)-copper(I) mixed-valence coordination polymer as source for copper oxide nanoparticles with catalytic activity in C-N, C-O and C-S cross-coupling reactions

Cyano-bridged copper(II)-copper(I), mixed valence polymer, namely {[Cu4(CN)5(C5H5N)4]}n (1), was synthesized and characterized by elemental analysis, IR, thermogravimetric analysis, differential scanning calorimetric analysis, and single crystal X-ray crystallography. Single crystal X-ray s ... more

All publications

The determination of V and Mo by dispersive liquid-liquid microextraction (DLLME) combined with laser-induced breakdown spectroscopy (LIBS)

Laser-induced breakdown spectrometry (LIBS) is a promising analytical technique with well-known advantages and limitations. However, despite its growing popularity, this technique has been applied mainly to solid samples and there have been a smaller number of studies devoted to liquid samp ... more

Gd-Al co-doped mesoporous silica nanoparticles loaded with Ru(bpy)32+ as a dual-modality probe for fluorescence and magnetic resonance imaging

Mesoporous silica nanoparticles (MSNs) were co-doped with Gd3+ and Al3+ and then loaded with Ru(bpy)32+ by ion-exchange to prepare Ru/Gd-Al@MSNs. The as-prepared Ru/Gd-Al@MSNs were applied as contrast agents for in vivo fluorescence and magnetic resonance (MR) dual-modality imaging with the ... more

Fast determination of surface density of titanium in ultrathin layers using LIBS spectrometry

This work deals with the use of laser-induced breakdown spectroscopy (LIBS) for determining the surface density of titanium in ultrathin layers, particularly in ultrathin layers on a steel sheet. The results obtained by LIBS spectroscopy were compared with those obtained by wavelength dispe ... more

Acoustic radiation forces at liquid interfaces impact the performance of acoustophoresis

Acoustophoresis is a method well suited for cell and microbead separation or concentration for downstream analysis in microfluidic settings. One of the main limitations that acoustophoresis share with other microfluidic techniques is that the separation efficiency is poor for particle-rich ... more

Microfluidic on-demand droplet merging using surface acoustic waves

Individual droplets can be isolated within microfluidic systems by use of an immiscible carrier layer. This type of two phase systems, often termed “digital microfluidics”, find wide ranging applications in chemical synthesis and analysis. To conduct on-chip biochemical analysis, a key step ... more

All publications on analytics

Biochemical analysis of TssK, a core component of the bacterial Type VI secretion system, reveals distinct oligomeric states of TssK and identifies a TssK-TssFG subcomplex

Gram-negative bacteria use the Type VI secretion system (T6SS) to inject toxic proteins into rival bacteria or eukaryotic cells. However, the mechanism of the T6SS is incompletely understood. In the present study, we investigated a conserved component of the T6SS, TssK, using the antibacter ... more

Early and late HIV-1 membrane fusion events are impaired by sphinganine lipidated peptides that target the fusion site

Lipid-conjugated peptides have advanced the understanding of membrane protein functions and the roles of lipids in the membrane milieu. These lipopeptides modulate various biological systems such as viral fusion. A single function has been suggested for the lipid, binding to the membrane an ... more

Cyano-bridged copper(II)-copper(I) mixed-valence coordination polymer as source for copper oxide nanoparticles with catalytic activity in C-N, C-O and C-S cross-coupling reactions

Cyano-bridged copper(II)-copper(I), mixed valence polymer, namely {[Cu4(CN)5(C5H5N)4]}n (1), was synthesized and characterized by elemental analysis, IR, thermogravimetric analysis, differential scanning calorimetric analysis, and single crystal X-ray crystallography. Single crystal X-ray s ... more

Photoelectronically active, metal organic framework films prepared by self-directed assembly of silanized porphyrin cobalt monomers

A novel and facile approach for preparing highly oriented porphyrin metal–organic framework films on various substrates is explored by employing self-directed assembly of silanized porphyrin cobalt monomers (SPCMs). The three-dimensional ordered porphyrin films display excellent photo-elect ... more

Balanced [small pi]-[small pi] interaction directing the self-assembly of indolocarbazoles-based low molecular mass organogelators

New indolocarbazole derivatives emitting strong blue light have been synthesized. It is found that the strong π-π interactions between indolocarbazoles 4-6 without long carbon chains lead to the formation of crystal or crystal-liked aggregates. We have previously found that tert-butyl could ... more

All publications on chemistry

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 94, 704 (July 2014). doi:10.1038/labinvest.2014.74 more

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 94, 596 (June 2014). doi:10.1038/labinvest.2014.67 more

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 94, 476 (May 2014). doi:10.1038/labinvest.2014.56 more

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 94, 360 (April 2014). doi:10.1038/labinvest.2014.49 more

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 94, 250 (March 2014). doi:10.1038/labinvest.2014.9 more

All publications on lab technology

Electrical transport and morphological studies of polyaniline nanostructures

Polyaniline nanostructures have been synthesized by self‐assembly method by varying the dopant to monomer molar ratio. High resolution transmission electron micrographs show how the dopant to monomer molar ratio influences on the morphology and structure. The temperature dependence of dc co ... more

Facile preparation of PLGA microspheres with diverse internal structures by modified double‐emulsion method for controlled release

Poly(l‐lactide‐co‐glycolide) (PLGA) microspheres with diverse internal structures and different release behaviors were prepared via a modified double‐emulsion method by introduction of heparin or carboxymethyl chitosan in the inner aqueous phase and calcium chloride in the outer aqueous pha ... more

Electrical, mechanical, and thermal properties of exfoliated graphite/phenolic resin composite bipolar plate for polymer electrolyte membrane fuel cell

Exfoliated graphite (EG) was synthesized from natural flake graphite by acid treatment followed by microwave irradiation. A maximum expanded volume of 560 mL/g was achieved for this exfoliation of graphite. EG/phenolic resin composite bipolar plates for polymer electrolyte membrane fuel cel ... more

Preparation and performance of sulfonated polysulfone flat ultrafiltration membranes

Sulfonated polysulfone (SPSF) flat ultrafiltration membranes were successfully prepared by immersion precipitation phase inversion method. N‐Methyl pyrrolidone was used as a solvent, and polyvinylpyrrolidone (PVP) was used as a polymeric additive in the casting solution. The effects of cast ... more

Preparation and characterization of chain extended Poly(butylene succinate) foams

In order to improve the viscoelasticity and foamability, poly (butylene succinate) (PBS) was modified through reactive melt mixing with chain extender (CE) having multi epoxy‐groups. Subsequently, the prepared chain extended PBS (CEPBS) was foamed in a high pressure stainless steel autoclav ... more

All publications on chemical engineering

Cr(III) Oxidation by Biogenic Manganese Oxides of Varying Structural Ripening

Environ. Sci.: Processes Impacts, 2014, Accepted ManuscriptDOI: 10.1039/C4EM00077C, Paper Yuanzhi Tang, Samuel M Webb, Emily Estes, Colleen M HanselThis is an Accepted Manuscript, which has been through the RSC Publishing peer review process and has been accepted for publication. Accepted ... more

Immobilization of U(VI) on iron oxy-hydroxides under various physicochemical conditions

The immobilization of U(VI) at solid/water interface is an important process related to its transportation and migration in environment, which is dominantly controlled by its sorption behavior of U(VI). In this study, U(VI) sorption on Fe(II) and Fe(III) oxy-hydroxides prepared using co-pre ... more

Chromium(VI) removal from aqueous solution and industrial wastewater by modified date palm trunk

Date palm trunk (DPT) was grafted with diethylenetriamine (DETA) followed by triethylamine amine (TEA) using epichlorohydrin as a crosslinking agent. The potential of modified date palm trunk (MDPT) for the effective removal of Cr(VI) from aqueous solution has been investigated. The equilib ... more

Prioritizing Waterbodies To Balance Agricultural Production and Environmental Outcomes

Environmental Science & Technology DOI: 10.1021/es5024509 more

Use of Isotope Dilution Method To Predict Bioavailability of Organic Pollutants in Historically Contaminated Sediments

Many cases of severe environmental contamination arise from historical episodes, where recalcitrant contaminants have resided in the environment for a prolonged time, leading to potentially decreased bioavailability. Use of bioavailable concentrations over bulk chemical levels improves risk ... more

All publications on environmental technology
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