Chemometric method
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Ebook "Analytical chemistry applied to emerging pollutants" addresses the highly relevant subject of emerging pollutants, which are especially alarming since most of the available treatment technologies are unable to degrade them. It discusses the sources of these pollutants and their fate in the environment, and the main tools available for their analysis. It also describes the representative environmental matrices (air, soil and water) and appropriate analytical methods for each matrix.
128p tracanhphuonghoa1007 22-04-2024 5 2 Download
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Ebook "Optical spectroscopy and computational methods in biology and medicine" gives a comprehensive overview of recent progress in various vibrational spectroscopic techniques and chemometric methods and their applications in chemistry, biology and medicine. In order to meet the needs of readers, the book focuses on recent advances in technical development and potential exploitations of the theory, as well as the new applications of vibrational methods to problems of recent general interest that were difficult or even impossible to achieve in the not so distant past.
540p nhanphanguyet 28-01-2024 5 2 Download
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In the present study, two chemometric techniques, Artificial Neural Network (ANN) and Partial Least Square-Discrimination Analysis (PLSDA) have been assessed for their efficiencies for classification. Here, UV spectroscopic data are used as input.
6p viisac 23-09-2023 4 1 Download
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The aim of this study was to develop a rapid method for determining geographical origin of black pepper based on combination of near-infrared spectroscopy and chemometric algorithms. Near-infrared spectroscopy was used to determine the geographical origin of 111 black pepper samples from three regions in Vietnam: North Central Region, Central Highlands and Southeast Region.
8p viblackwidow 07-04-2023 7 4 Download
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In this work, a chemometric approach to positive electrospray ionization (ESI) optimization for the simultaneous determination of the cyromazine, carbendazim, methomyl, imidacloprid, and thiophanate methyl in vegetable samples by liquid chromatography- mass spectrometry (LC-MS) has been developed.
6p vicedric 08-02-2023 2 1 Download
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In this study, non-targeted gas chromatography-Orbitrap-mass spectrometry (GC-Orbitrap-MS) analysis of semi-volatile organic compounds (SVOCs) in indoor environmental dust samples is proposed. Highresolution mass spectrometry (HRMS) provides massive amounts of information-rich mass data which presents storage and processing challenges.
23p viginny 23-12-2022 9 3 Download
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A new, rapid, and sensitive gas chromatography–mass spectrometry (GC-MS) method was developed for the determination of ezetimibe (EZE) in human plasma. EZE was derivatized prior to GC-MS analysis. Various derivatization techniques such as acetylation, methylation, and silylation were tried. EZE was extracted from plasma with high recovery (94.39%–97.57%) using methyl tertbutyl ether and carbonate buffer (pH 9). Chromatographic conditions were optimized using chemometric methods.
12p langthannam 29-12-2021 10 0 Download
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This study aimed to propose a mathematical method to investigate and optimize the simultaneous elimination process of multiple organic pollutants using the Fenton process. Hence, the treatment of rhodamine B (RB) and acid red 14 (AR14) dyes in their binary solution was studied. Multivariate curve resolution alternating least square (MCR-ALS), a novel chemometric method, was applied along with correlation constraints to resolute the UV-Vis spectrophotometric data, enabling quantification of investigated dyes despite a high spectral overlapping.
15p tudichquannguyet 29-11-2021 10 1 Download
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Developed a chemometric-photometric analysis process in combination with Kalman filter method to simultaneously analyze mixtures of 2 and 3 substances with molecular absorption spectra overlapping in pharmaceutical samples; apply the process has been built to simultanneously analyze mixtures 2 and 3 substances in some pharmaceuticals are on the market Vietnam.
26p nguathienthan12 23-05-2021 21 2 Download
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In addition, PAN was a colored reagent and absorption at a wavelength near to the wavelength of maximum absorbance of PAN complexes with metal ions lead to the mutual overlap between the reagent and the complex spectrum.
6p tamynhan9 02-12-2020 13 2 Download
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A simple method using Fourier Transform Near-Infrared (FT-NIR) was investigated to determine quality of sugarcane/sugarcane juice in terms of ◦ brix value (total soluble solids), sucrose content (polarization %) and purity. Correlation equations for the chemometric models to predict the quality parameters of sugarcane juice were developed using partial least square (PLS) regression and were evaluated by cross validation and external test set validation to test their reliability for the calculation of ◦ brix (TSS), sucrose content and purity.
8p caygaocaolon8 07-11-2020 14 1 Download
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Atractylodis rhizoma, is the dried rhizomes of Atractylodes lancea (Thunb.) DC. or A. chinensis (DC.) Koidz. Both of two are pharmacologically and economically important, while with differences in efficacy.
13p vijiraiya2711 27-05-2020 8 1 Download
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Today, most investigations of the plant metabolome tend to be based on either nuclear magnetic resonance (NMR) spectroscopy or mass spectrometry (MS), with or without hyphenation with chromatography. Although less sensitive than MS, NMR provides a powerful complementary technique for the identification and quantification of metabolites in plant extracts.
13p trinhthamhodang1 16-11-2019 15 0 Download
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Carob samples from seven different Mediterranean countries (Cyprus, Greece, Italy, Spain, Turkey, Jordan and Palestine) were analyzed using Fourier Transform Infrared (FTIR) spectroscopy. Seed and flesh samples of indigenous and foreign cultivars, both authentic and commercial, were examined. The spectra were recorded in transmittance mode from KBr pellets.
8p trinhthamhodang1 14-11-2019 20 1 Download
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Colostrum is essential to guarantee normal and healthy feeding in newborn ruminants during the first hours. In the present work, Laser-Induced Breakdown Spectroscopy (LIBS), as a spectrochemical analytical technique, and principal component analysis (PCA) as a multivariate analysis method were used to evaluate colostrum compared to mature milk of sheep to plan the nutritional strategies for newly born lambs. Samples of colostrum have been collected from thirty-three Barki ewes.
7p trinhthamhodang1 14-11-2019 13 0 Download
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This study aimed to exploit laser-induced breakdown spectroscopy, enhanced by nanoparticles (NELIBS), as a fast, sensitive and low-cost technique, to correlate the elemental composition of recent and ancient bovine bone with the elemental composition of the fodder that has been fed to the cattle throughout their life. Biosynthesized silver nanoparticles (BS-Ag NPs) were used to enhance the emission intensity of the spectral lines in the LIBS spectra of contemporary and ancient bovine bones and fodder samples.
8p caygaocaolon1 13-11-2019 17 0 Download
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Honey is a natural, sweet, and syrupy fluid which has been used in Vietnam in a variety of ways; as a food supplement, beauty product, and natural drug. However, quality control and characterization of honey are blind problems. Consumers, and even market management committees, must believe in the producer’s quality standards without using any special techniques to evaluate the botanical origins of honey in the Vietnamese market. The chemical composition and physical properties of natural honey vary per plant species of which the honey bees scrounged.
8p caygaocaolon1 13-11-2019 16 0 Download
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Chemometric Techniques for Quantitative Analysis shows how to produce and use quantitative analytical calibrations in a laboratory or production environment following a variety of methods, how to estimate the time and resources needed to develop analytical calibrations, and how to employ the quantitative software provided with a wide range of instruments and commercial software packages. Among several, this bestselling volume covers basic and classical approaches, component regression; PCR in action; partial least squares; PLS in action.
0p doilan 26-01-2013 87 7 Download
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Advanced Computer-Assisted Techniques in Drug Discovery edited by Han van de Waterbeemd .Methods and Principles in Medicinal Chemistry Edited by R. Mannhold P. Krogsgaard-Larsen H. Timmerman Volume 1 Hugo Kubinyi, QSAR: Hansch Analysis and Related Approaches Volume 2 Han van de Waterbeemd (ed.), Chemometric Methods in Molecular Design Volume 3 Han van de Waterbeemd (ed.), Advanced Computer- Assisted Techniques in Drug Discovery .Methods and Principles in Medicinal Chemistry edited by R. Mannhold, P. Krogsgaard-Larsen, H.
361p maket1311 16-10-2012 71 15 Download
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In the book "Chemometrics in practical applications", various practical applications of chemometric methods in chemistry, biochemistry and chemical technology are presented, and selected chemometric methods are described in tutorial style. The book contains 14 independent chapters and is devoted to filling the gap between textbooks on multivariate data analysis and research journals on chemometrics and chemoinformatics.
0p qsczaxewd 22-09-2012 63 12 Download