A-scans from ultrasonic testing of long shafts are complex signals, thus the discrimination of different types of echoes is of importance for non-destructive testing and equipment maintenance. Research has focused on selecting features of physical significance or exploring classifier like Artificial Neural Networks and Support Vector Machines. This paper summarizes and reports on our comprehens...

Laser micro-dissection permits isolation groups of cells from heterogeneous tissue sections under direct microscopic visualization. This technology not only allows isolation of homogenous subpopulation of cells but also allows immunophenotypically similar cells for RNA/ DNA or protein extraction for downstream applications like western blot, mass spectrophotometry, real time quantitative polyme...

Aspiration of tracheobronchial foreign bodies commonly affects young children, is potentially life threatening and requires early intervention for extraction. Access to facilities and skill manpower for bronchoscopic extraction is however limited in Nigeria. The aim of this study is to describe the experience in our institution with bronchoscopic removal of tracheobronchial foreign bodies and h...

Many modern analytical methods deal with the trace-level determination of compounds of interest in highly complex environmental samples by means of chromatographic techniques. The introduction of a “clean” sample into an analytical instrument can make analyses easier and prolongs the equipment life. The use of solid-phase extraction (SPE) has grown and is a fertile technique of sample prepa...

OBJECTIVE To establish a routine for the extraction of the total levels of CoQ10 in human plasma through the Ultra High Performance Liquid Chromatography (UHPLC). METHODS Two extraction protocols were tested: a) methanol: hexane and b) 1-propanol. The following parameters were analyzed: extraction temperature (19ºC and 4ºC), extraction tubes (glass and polypropylene), and surfactants (SDS, Tr...

ii Chapter I General Introduction 1 Chapter II Literature review 4 2.1 Aristolochia 5 2.1.1 Aristolochia consimilis 5 2.2 Pharmacology 6 2.3 Aristolochic Acid 8 2.3.1 Toxicity 9 2.4 Methods for analyzing aristolochic acids 11 2.4.1 Extraction of aristolochic acids 11 2.4.2 Thin layer chromatography (TLC) 12 2.4.3 High performance liquid chromatography (HPLC) 12 2.5 Objective 14 2.6 Approach 14 ...

Feature extraction and accurate classification of electric power equipment, help to improve the automation and intelligent level of power system management. Aiming at the problems that applying Hu invariant moments to extract image feature computes large and applying corner vector to match has too dimensions, this paper presented Harris corner invariant moments algorithm. This algorithm only ca...

This paper discusses the identification of trash objects in cotton using machine vision-based systems. Soft computing techniques such as neural networks and fuzzy inference systems can classify trash objects into individual categories such as bark, stick, leaf, and pepper trash types with great accuracies. High speed trash measurements, enables the implementation of these techniques for on-line...