A sensitive quantification of decabrominated diphenyl ether (deca-BDE) was achieved by optimizing the injection temperature, pressure and column system with gas chromatography mass spectrometry in selected ion monitoring mode. A simple one-step cleanup method with acid silica gel column chromatography showed the optimum efficiency and minimum matrix interference. Ultrasonic-assisted extraction ...

This work presents the results obtained using a microcolumn agitated by pulsed caps, using aqueous two-phase systems formed polyethylene glycol and salts (monobasic and dibasic) potassium phosphate for protein extraction. Proteins used were extracted cytochrome b5 and the enzyme ascorbic oxidoreductase. It was observed that operation of this equipment was stable and high efficiency values were ...

Endoscopic extraction of sharp and or irregularly shaped foreign bodies (SIFB) impacted in the esophagus poses a challenge to the endoscopist. It may be hazardous and is known to be associated 1,2,3 with a higher risk of esophageal perforation . This hazard may be amplified in the face of inadequate equipment, a situation prevalent in resource-limited settings of developing countries. Some impa...

Extracting a tooth is the final treatment for multiple dental problems. Persons who are not dentists, however, have little experience with tooth extractions. When a remote setting makes it impossible to send a patient for optimal dental treatment, the clinician may need to extract teeth, sometimes using improvised equipment. The following cases of two patients with three carious, painful molars...

Electrical modeling and simulation of the LHC magnet strings are being used to determine the key parameters that are needed for the design of the powering and energy extraction equipment. Poles and zeros of the Laplace expression approximating the Bode plot of the measured coil impedance are used to synthesize an R/L/C model of the magnet. Subsequently, this model is used to simulate the behavi...

A prompt report for the commissioning run of the longbaseline neutrino oscillation experiments will be presented. Improvement of the KEK-PS main ring has been performed for recent years in order to prepare the long-baseline neutrino oscillation experiment. Intensity upgrade studies and the hard ware improvements result in a factor of 50% increase in the beam intensity to 5-6 × 10 ppp up to now....

The Industrial Internet of Things (IIoT) deploys massive communication devices for information collection and process control. Once it reaches failure, will seriously affect the operation industrial system. This paper proposes a new method multi-entity knowledge joint extraction (MEKJE) IIoT equipment faults. constructs multi-task tightly coupled model fault entity relationship extraction. We u...

The article discusses the possibility and efficiency of using discrete diffusion in extraction materials with an internal anisotropic structure comparison a continuous process. For this purpose, theoretical calculations were made experimental studies countercurrent pectin from Jerusalem artichoke carried out. To carry out simulation, equation for calculating coefficient adsorption isotherm duri...

A multi-head-attention-network-based method is proposed for effective information extraction from multidimensional data to accurately predict the remaining useful life (RUL) of gradually degrading equipment. The features desired equipment were evaluated using a comprehensive evaluation index, constructed discrete coefficients, based on correlation, monotonicity, and robustness. For extraction, ...