Abstract Improvement of catalytic efficiency immobilized enzymes via materials engineering was demonstrated through the preparation bioactive nanofibers. Bioactive polystyrene (PS) nanofibers with a typical diameter 120 nm were prepared and examined for biotransformations. The produced by electrospinning functionalized PS, followed chemical attachment model enzyme, α‐chymotrypsin. observed enzyme loading as determined active site titration up to 1.4% (wt/wt), corresponding over 27.4%...

Nanoparticles provide an ideal remedy to the usually contradictory issues encountered in optimization of immobilized enzymes: minimum diffusional limitation, maximum surface area per unit mass, and high effective enzyme loading. In addition promising performance features, unique solution behaviors nanoparticles also point a transitional region between heterogeneous (with enzymes) homogeneous soluble free catalysis. The particle mobility, which is related size viscosity through...

Solvent−gelator interactions play a key role in mediating organogel formation and ultimately determine the properties of gel. The effect solvent on was investigated selected ester, ketone, alcoholic solvents using unique symmetrical trehalose diesters as gelators. In same class gelation number (defined ratio molecules that gel per gelator molecule) decreased for 6,6'-diacetate 6,6'-dibutyrate Hildebrand solubility parameter increased. opposite observed 6,6'-didecanoate 6,6'-dimyristate....

Infection with antibiotic-resistant pathogens such as methicillin-resistant Staphylococcus aureus (MRSA) is one of the primary causes hospitalizations and deaths. To address this issue, we have designed antimicrobial coatings incorporating carbon nanotube−enzyme conjugates that are highly effective against pathogens. Specifically, incorporated nanotubes lysostaphin, a cell wall degrading enzyme, into films to impart bactericidal properties epidermidis. We fabricated characterized...

Abstract Perhydrolase S54V (AcT) effectively catalyzes the perhydrolysis of propylene glycol diacetate (PGD) to generate peracetic acid (PAA). PAA is a potent oxidant used for sanitization and disinfection, with broad effectiveness against bacteria, yeasts, fungi, spores. In this study, active stable composites are developed by incorporating AcT–carbon nanotube conjugates into polymer latex‐based paint. At conjugate loading 0.16% (w/v), composite generated 11 m M in 20 min, capable killing...

The long and short of it: A regioselective enzyme-catalyzed acylation the disaccharide trehalose generated a family low-molecular-weight gelators with unprecedented properties. selectivity enzymatic catalysis enables direct control over gelation properties by simply varying acyl-chain length to give in solvents ranging from highly hydrophilic acetonitrile hydrophobic cyclohexane.

Functional multi-walled carbon nanotubes (MWNTs) are obtained by conjugation of MWNTs with tubulin. In vitro polymerization tubulin–MWNT conjugates excess free tubulin results in the microtubules encapsulating to yeild nanotube-based biohybrids. The functional biohybrids manipulated on kinesin-coated surfaces. This strategy represents a new paradigm for design hierarchical supramolecular assemblies. Detailed facts importance specialist readers published as "Supporting Information". Such...

Native water-soluble enzymes were transformed into interface-binding via conjugation with hydrophobic polymers, thus enabling interesting interfacial biocatalysis between immiscible chemicals at oil/water interfaces. Such demonstrated a significantly improved catalytic efficiency as compared to traditional biphasic reactions contained in the bulk aqueous phase. Particularly, polystyrene-conjugated β-galactosidase showed that was more than 145 times higher of native enzyme for...

Turn on the pressure: Vertically aligned carbon-nanotube membranes show super-compressive and elastic properties. The pore size can be dynamically reversibly controlled by mechanical deformation of membrane, over ranges useful for ultrafiltration (see picture). separation proteins with molecular weights 14–540 kDa (about 5–20 nm in size) is demonstrated a single membrane set at different sizes stress. Supporting information this article available WWW under...

A mineral-filled in situ composite was prepared by a colloidal approach first suspending kaolin filler particles aqueous caprolactam, and then polymerizing caprolactam at high pressure temperature. The purpose of this polymerization is to improve particle dispersion enhance interaction the polymer matrix. X-ray diffraction studies kaolin/Nylon-6 composites revealed that x-ray peak corresponding α-crystal form Nylon-6 diminished with increasing loading, while γ-crystal structure became more...

We have developed enzyme-based composites that rapidly and effectively detoxify simulants of V- G-type chemical warfare nerve agents. The approach was based on the efficient immobilization organophosphorus hydrolase onto carbon nanotubes to form active stable conjugates were easily entrapped in commercially available paints. resulting catalytic-based showed no enzyme leaching rendered >99% decontamination 10 g/m(2) paraoxon, a simulant V-type agent, 30 minutes >95%...

Abstract Laser micro-structuring of amorphous polyether(ether)ketone (PEEK) has been demonstrated with 180 fs/1 kHz NIR (775 nm) and NUV (387 laser pulses. Significant differences in laser-material interaction is observed between the wavelengths single pulse ablation threshold found to be 2.01 ± 0.05 J cm −2 0.23 0.02 at 775 nm 387 respectively. This connected requirement for multi-photon absorption nm, where PEEK transparent, while significant linear within material bandgap occurs,...

Abstract This paper investigates the electrical and thermal properties of pure epoxy resin (EP) its micro–nano hybrid composites (20 wt% micro-AlN fillers with 1 3 nano-Al 2 O fillers; 50% 3% fillers) for power electronic packaging applications. Electrical such as space charge distribution, conductivity surface potential decay are measured. The performance fabricated samples is estimated using analysis devices. composite consisting 20 exhibits least accumulation, higher better stability....

DNA bound to single-walled carbon nanotubes retains its innate functional and structural properties, therefore, can serve as the genetic template for gene transcription by RNA polymerase catalysis in formation of mRNA (see figure). This is also fully used message vitro protein synthesis.

This work investigates the influence of aluminum nitride (AlN) fillers on charge dynamics epoxy resin (EP) and its hybrid composites through space measurements quantum chemical calculations (QCCs). QCCs analyze energy-level orbitals trap parameters molecules under electric field. The pure EP exhibits a homo-charge accumulation, whereas fewer charges are accumulated in composites. AlN filler addition significantly suppresses accumulation during polarization facilitates dissipation...

Abstract The effect of adding electron‐buffering voltage stabilizer (1 wt% m‐aminobenzoic acid) on the electrical tree‐induced degradation cross‐linked polyethylene (XLPE) was studied at high temperatures. tree inception, growth, and partial discharge characteristics were simultaneously analyzed 30, 50, 70°C, respectively. results showed that growth rate activity as well repetition rate, significantly increased with temperature for pure XLPE blend. However, blend exhibited higher inception...

Frost-resistant and anti-icing polymeric coatings are widely used for various industries the extremely low temperatures that often appear in winter. Among different icephobic materials, nontoxic fluorine-free polysiloxanes with a surface energy present tremendous potential to be utilized as passive coatings. However, conventional from limited petroleum-based feedstocks potentially lead serious resource crisis environmental concerns. In this work, renewable plant oil-based were prepared...