A novel MnO2 nanorods modified screen-printed electrode was fabricated and used as a voltammetric sensor for Sudan determination. were characterized using Field emission-scanning electron microscopy (FE-SEM). Electrochemical measurements performed cyclic voltammetry (CV), linear sweep (LSV), differential pulse (DPV), chronoammperometry (CA). The on the surface act an excellent catalyst oxidatio...

The accumulation of spent carbide (YG8), not only pollutes the environment but also causes waste tungsten, cobalt and other rare metal resources. To better address this issue, we proposed a combined electrochemical separation process low-temperature aqueous solution high-temperature molten salt for tungsten cobalt. H<sub>2</sub>WO<sub>4</sub> was obtained from in an solu...

Absorption spectrophotometry has been and still is the industry standard for detection in HPLC. Limit of detection (LOD) and linear dynamic range (LDR) are the primary performance requirements and have driven continuous improvement of spectrophotometric HPLC detectors. Recent advances in HPLC column technology have led to low flow-rate HPLC such as capillary HPLC and nanoflow HPLC and put highe...

• Laser-scanning vibrometry successfully discriminated the mechanical behavior of 3D printed specimens produced with different process parameter combinations. Equivalent Elastic Modulus data served to confirm significant influences and interactions between parameters. A model was developed provide elastic modulus values for use in dynamic simulations parts. In this study, we explored suitabilit...

Thanks to unparalleled near-horizon images of the shadows Messier 87* (M87*) and Sagittarius A* (Sgr A*) delivered by Event Horizon Telescope (EHT), two amazing windows opened up us for strong-field test gravity theories as well fundamental physics. Information recently published from EHT about Sgr A*'s shadow lets have a novel possibility exploration Lorentz symmetry violation (LSV) within Sta...

& In an HPLC system the detector is the component responsible for turning a physical or chemical attribute into a measureable signal corresponding to concentration or identity. In the early days of HPLC, detection was often carried out by collecting fractions and analyzing them off-line. It wasn’t until the 1940’s and 1950’s that the first online detectors for HPLC were introduced. Certainly an...

The morphology and electrical properties of orthorhombic β-WO3 nanoflakes with thickness of ~7 to 9 nm were investigated at the nanoscale with a combination of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), current sensing force spectroscopy atomic force microscopy (CSFS-AFM, or PeakForce TUNA™), Fourier transform infra-red absorption spectroscopy (FTIR), linear...

We consider an investor who seeks to maximize her expected utility derived from her terminal wealth relative to the maximum wealth achieved over a fixed time horizon, and under a portfolio drawdown constraint, in a market with local stochastic volatility (LSV). The newly proposed investment objective paradigm also allows the investor to set portfolio benchmark targets. In the absence of closed-...

In this work, carbon nanosheet (CNS) based electrode was designed for electrochemical biosensing of glucose. CNS has been obtained by the pyrolysis of barley at 600-750 °C in a muffle furnace; it was then purified and functionalized. The CNS has been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopic techniques. The electrochemical activity of C...