We describe a simple and versatile method for bonding thermoplastics to elastomeric polydimethylsiloxane (PDMS) at room temperature. The of various including polycarbonate (PC), cyclic olefin copolymer (COC), polymethylmethacrylate (PMMA), polystyrene (PS), PDMS has been demonstrated An irreversible was formed instantaneously when the thermoplastics, activated by oxygen plasma followed aminopropyltriethoxysilane modification, were brought into contact with treated PDMS. surface modified...

Phytochemical analysis of phenolic acids and flavonols poses a challenge, necessitating the development an efficient separation method. This facilitates quantification these compounds, yielding valuable insights into their benefits.To develop highly effective by capillary electrophoresis ultraviolet (UV) detection through modification surface using 3-aminopropyltriethoxysilane (APTES) at millimolar concentrations.The is modified with 0.36 mM-APTES solution. The electrolyte 20.0 mM borate...

Development of all polymer-based nanofluidic devices using replication technologies, which is a prerequisite for providing larger user base, hampered by undesired substrate deformation associated with the multi-scale structures. Therefore, most have been fabricated in glass-like substrates or polymer resist layer coated on substrate. This letter presents rapid, high fidelity direct imprinting process to build single step. Undesired during was significantly reduced through use stamp made from...

We report the surface modification of thermoplastic nanochannels and evaluation charge density, zeta potential electroosmotic flow (EOF).

Mixed-scale nano- and microfluidic networks were fabricated in thermoplastics using simple robust methods that did not require the use of sophisticated equipment to produce nanostructures. High-precision micromilling (HPMM) photolithography used generate mixed-scale molding tools subsequently for producing fluidic into such as poly(methyl methacrylate), PMMA, cyclic olefin copolymer, COC, polycarbonate, PC. Nanoslit arrays imprinted polymer a nanoimprinting tool, which was composed an...

A nonprecious metal and biopolymer-based catalyst, Cu/chitosan beads, has been successfully prepared by using a software-controlled flow system. Uniform, spherical beads can be obtained with diameters in millimeter-scale narrow size distribution (0.78 ± 0.04 mm). The morphology of the are reproducible due to high precision rate. In addition, application as green reusable catalyst demonstrated convenient efficient protocol for direct synthesis imines via oxidative self- cross-coupling amines...

Capillary electrophoresis (CE) has the advantage of rapid anion analysis, when employing a reverse electroosmotic flow (EOF). The conventional CE method utilizes dynamic coatings with surfactants like cetyltrimethylammonium bromide (CTAB) in run buffer to EOF. However, this suffers from very slow equilibration leading drifting effective migration times analyte anions, which adversely affects identification and quantification peaks. Permanent coating capillary surface may obviate problem but...

By means of biorefinery, biogas production through anaerobic digestion is one the most common treatments wastewater in palm oil industry. After production, treated mill effluent (POME) generally discharged into environment. However, certain level hazardous compounds still exists wastewater, which can lead to pollution water bodies. In this study, we have investigated dynamics volatile organic acids dwelling consecutive POME treatment lagoons as well identified, and categorized, microbial...

This work presents one-incubation one-hour multiplex ELISA enabled by aqueous two-phase systems for five-plex cytokine detection in human ThP-1 macrophages.

Abstract A hydrothermal sol–gel method for reproducible formation of silica nanolayer on the wall capillaries was developed electrochromatography. The formulation optimized by observation uniform gel an optical microscope. variables include types solvent, water-TEOS ratio, CTAB and urea contents, mixing method. procedure produced a coating ca. 100 nm thick layer capillary. Surface morphology characterized SEM, contact angle chemical composition FT-IR spectroscopy X-ray powder diffraction....

This paper reports the simultaneous determination of TPC and AA beverages using lab-on-a-disc.

Identification of smokers and non-smokers is achieved with a proposed cut-off limit 1.0 mM by rapid simple method for the determination thiocyanate in human saliva.

A microfluidic method with front-face fluorometric detection was developed for the determination of total inorganic iodine in drinking water. polydimethylsiloxane (PDMS) device employed conjunction Sandell-Kolthoff reaction, which iodide catalyzed redox reaction between Ce(IV) and As(III). Direct alignment an optical fiber attached to a spectrofluorometer used as convenient detector remote detection. Trace (IO3- I-) present naturally water measured by on-line conversion iodate iodine....

Abstract This work presents an innovative silica-layer coated capillary with comparison study of the and fused-silica for separation seven phenolic acids viz . p -hydroxyphenylacetic acid (PHPA), -coumaric (PCA), -hydroxybenzoic (PHBA), caffeic (CFA), (3,4-dihydroxyphenyl)acetic (DHPA), gallic (GLA), 2,3,4-trihydroxybenzoic (THBA), together caffeine (CF), by electro-chromatography (CEC) micellar electrokinetic chromatography (MEKC), respectively. The running buffer was 25.0 mM borate at pH...

Significant changes in the formation and retention of magnetic bead plugs a capillary during electrophoresis were studied, it was demonstrated that these effects due to type biological molecule immobilized on surface beads. Three molecules, an antibody, oligonucleotide, alkaline phosphatase (AP), attached otherwise identical streptavidin‐coated beads through biotin‐avidin binding order isolate differences immobilization field resulting from surface. AP also using epoxy groups surfaces...

Abstract Introduction Brassica vegetables contain high levels of indole compounds which have been found to provide health benefits, especially as cancer‐preventive agents. An efficient and rapid method using solvent extraction with capillary electrophoresis (CE) ultraviolet (UV) detection was developed for the determination four major indoles from types vegetables. Materials Methods Freeze‐dried samples vegetables, i.e. broccoli, cauliflower, Chinese cabbage cabbage, were selected. Hence, 1...