In this work, we developed a simple and selective method for separation and spectrophotometric determination of trace amounts of cetylpyridinium chloride (CPC) in pharmaceutical products using cloud point extraction (CPE) technique. The method is based on cloud point extraction of the CPC in alkali conditions using of nonionic surfactant Triton X-114. Under selected conditions, the calibration ...

In this work, we developed a simple and selective method for separation and spectrophotometric determination of trace amounts of cetylpyridinium chloride (CPC) in pharmaceutical products using cloud point extraction (CPE) technique. The method is based on cloud point extraction of the CPC in alkali conditions using of nonionic surfactant Triton X-114. Under selected conditions, the calibration ...

ABSTRACT A flow-through chip for sequential exchange and collection of up to five different liquids, surrounding either cells or microbeads has been developed. The presented device was successfully applied for wash and sequential elution of peptides bound to the surface of beads and cells. Collected fractions containg the eluted peptides were subsequently subjected to microfluidic solid phase e...

Thoracic time-sequential MRI can be used to assess diaphragm motion pattern without exposing radiation to subject. Clinicians may employ the motion to evaluate the severeness of chronic obstructive pulmonary disease (COPD). This study proposed a novel method of diaphragm motion extraction method on time-sequential thoracic MRI in sagittal plane. Otsu’s threshold and active contour algorithm are...

In areas contaminated by potentially toxic elements (PTEs), knowledge of processes metal mobilisation is the basis for choice appropriate remediation methodologies. The metals a function several factors, and response to these factors must be well known during planning strategies. activity an ore metallurgical plant in South-East Brazil resulted major contamination heavy metals. Reversing contam...

The first Waste Framework Directive issued by the European Union dates back to seventies but was drastically amended in last decade reduce environmental impacts of waste encouraging reuse, recycling and remanufacturing. Product recovery starts with disassembly which results high labor costs. Disassembly supports environmentally conscious choices like replacement defective parts extend life span...

The knowledge of the application behavior allows predicting the application workload during its execution and forecasting distributed data accesses. In order to obtain such data, different strategies can be employed, varying from simple source code analysis, sequential access pattern extraction (Kotz & Ellis, 1993), history-based approaches (Gibbons, 1997; Smith, Foster & Taylor, 1998) and on-l...

This article reviews the recent developments in Bio-Analytical sample preparation techniques and gives an update on basic principles, Applications and comparative discussion on the advantages and limitations of each technique. Conventional Solid-Phase Extraction (SPE), Molecularly Imprinted Polymer SPE techniques are have been considered as methods of past. Developments in SPE techniques such a...

a new simple and reliable method for rapid and selective extraction and determination of trace levels of zn(ii) ion is developed. zn(ii) ions are adsorbed quantitatively during passage of aqueous samples through pet-aa/aam nano fiber modified. almost all matrix elements were found to pass through the nano fiber to drain. modified poly (ethylene terephthalate)-grafted-acrylic acid/acryl amide na...