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Dissertations / Theses on the topic 'Thin-Layer- Chromatography High accuracy'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Ofori, Hayford. "Characterisation of sandalwood essential oils using high performance thin-layer chromatography and high resolution gas chromatography mass spectrometry." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2020. https://ro.ecu.edu.au/theses/2326.

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Sandalwood essential oil is extensively used in perfumes, cosmetics, and pharmaceuticals. The unique woody aroma of sandalwood essential oil is produced by (Z)-α-santalol and (Z)-β-santalol and these two compounds influence the oil quality. Variation in sesquiterpene composition and oil yield have been observed both within and across Santalum species. Gas Chromatography-Mass Spectrometry (GC-MS) is a technique commonly used to identify and quantify sesquiterpene compounds in sandalwood essential oils. High Performance Thin-Layer Chromatography (HPTLC) has yet to be fully explored as an alterna

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2

Yeager, Barry Todd. "New detection techniques in high performance thin layer chromatography and related studies." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187353.

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Recently, high performance thin layer chromatography, or HPTLC has seen considerable growth as an analytical technique. Most often perceived as a semi-quantitative or preliminary technique, in reality HPTLC is an analytical technique in its own right. Modern instrumentation, improved stationary phases, and automated techniques have found their way into the realm of HPTLC, vastly improving the scope of the technique. Today, HPTLC is a very popular analytical technique, possessing many advantages such as ease of use, high throughput, high sensitivity, and low cost. HPTLC is also applicable to a

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3

Arruda, Frommenwiler Débora. "Comprehensive high performance thin layer chromatography (HPTLC) fingerprinting in quality control of herbal drugs, preparations and products." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/671745.

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Quality control of herbals has its roots in the study of morphoanatomic and organoleptic characters. Nevertheless, in the last century, with the evolution of analytical chemistry, the quality control rapidly evolved from elementary tests to the use of sophisticated instruments combined with software for data management. In the current days, many authorities and organizations recommend a suite of tests, featuring many of these instruments, to evaluate quality of herbal products. HPTLC offers a comprehensive set of data that can be used not only for identification but also to evaluate the purity

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4

Hebron, Mwalwisi Yonah [Verfasser], Ulrike [Gutachter] Holzgrabe, Petra [Gutachter] Högger, and Lorenz [Gutachter] Meinel. "Assessment of Counterfeit and Substandard Antimalarial Medicines using High Performance Thin Layer Chromatography and High Performance Liquid Chromatography / Yonah Hebron Mwalwisi ; Gutachter: Ulrike Holzgrabe, Petra Högger, Lorenz Meinel." Würzburg : Universität Würzburg, 2018. http://d-nb.info/115509803X/34.

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5

Cleary, Maryanne Viola. "Quantitative HPTLC." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-07112009-040558/.

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6

Alpmann, Alexander [Verfasser], and Wolfgang [Akademischer Betreuer] Schwack. "Trace analysis of acrylamide by high-performance thin-layer chromatography coupled to mass spectrometry / Alexander Alpmann. Betreuer: Wolfgang Schwack." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2012. http://d-nb.info/1027353053/34.

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7

Colthup, Philip Victor. "Assessment of the value of high-performance thin-layer chromatography for the detection and characterisation of drugs and metabolites in biological fluids." Thesis, Liverpool John Moores University, 1993. http://researchonline.ljmu.ac.uk/4941/.

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8

Nassif, Lana Amine. "The Production of 2-Keto-L-Gulonic Acid by Different Gluconobacter Strains." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/30590.

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Vitamin C is industrially produced by the Reichstein method, which uses gluconobacters to oxidize sorbitol to sorbose then a chemical process to convert sorbose to 2-keto-L-gulonic acid (2-KLG). The establishment of a more extensive microbial process for 2-KLG production translates into a less expensive and more efficient production of vitamin C. I examined pure strains and mixed cultures for their ability to produce 2-KLG using thin layer and high performance liquid chromatography. The DSM 4027 mixed culture produced the highest yield, 25 g/L, of 2-KLG from 100 g/L of sorbose, while the gram-

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9

Barret, Laurie-Anne. "Influence des tensioactifs dans la cristallisation du complexe photosynthétique RC-LH1-pufX de Rhodobacter blasticus." Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-01017895.

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Ce projet vise à étudier, par une approche pluridisciplinaire, l'influence des la cristallisation des protéines membranaires (PM) en prenant pour protéine modèle le complexe photosynthétique RC-LH1-pufX de Rhodobacter blasticus. Des cristaux de ce complexe avaient été obtenus en présence de dodécyl-!-maltoside (DDM) et avaient diffractés à 8 Å de résolution. L'objectif final est de pouvoir améliorer, de façon rationnelle, la qualité des cristaux du complexe RC-LH1-pufX grâce à une meilleure compréhension des mécanismes mis en jeu. Dans un premier temps, trois tensioactifs dérivés du DDM ont ét

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10

Hebron, Mwalwisi Yonah. "Assessment of Counterfeit and Substandard Antimalarial Medicines using High Performance Thin Layer Chromatography and High Performance Liquid Chromatography." Doctoral thesis, 2018. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-145821.

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Although the prevalence of substandard and counterfeit pharmaceutical products is a global problem, it is more critical in resource-constrained countries. The national medicines regulatory authorities (MNRA) in these countries have limited resources to cater for regular quality surveillance programmes aimed at ensuring that medicines in circulation are of acceptable quality. Among the reasons explained to hinder the implementation of these strategies is that compendial monographs are too complicated and require expensive infrastructures in terms of environment, equipment and consumables. In th

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11

Han-Ying, Fu, and 傅涵嫈. "Determination of Coptidis Rhizoma and Prescriptions Containing Coptidis Rhizoma by High-performance Liquid Chromatography and Thin-Layer Chromatography." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/28637610793312434203.

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碩士<br>中國醫藥大學<br>中國藥學研究所碩士班<br>95<br>Abstract The Coptidis Rhizoma have been used in Traditional Chinese Medicine for a long time. They are the dried rhizoma of Coptis chinesis Franch., Coptis deltoidea C. Y. Cheng et Hsiao, Coptis teetoides C. Y. Cheng and Coptis omeiensis(Chen) C. Y. Chen of the Ranunculaceae family. In the present studies, berberine and palmatine contents in Coptidis Rhizoma and Chinese medicinal prescriptions containing Coptidis Rhizoma such as concentrated extracts of Coptidis Rhizoma, Ger Gen Chyn Lian Tang, Chir Shiann Tang and Tzy Shenn Ming Muh Tang were determined by

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12

Assunção, Marisa Sofia de Oliveira. "High-performance thin-layer chromatography detection of globotriaosylceramide in urine samples : improvement of the method and sampling." Master's thesis, 2012. http://hdl.handle.net/1822/23027.

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Dissertação de mestrado em Genética Molecular<br>Fabry disease (FD) is a lysosomal storage disorder caused by deficient or null production of the enzyme α-galactosidase A (α-Gal A) as a result of mutations in α-galactosidase A gene (GLA), located on the X chromosome. The systemic accumulation of α-Gal A substrates, which are excreted in urine, leads to progressive damage of several organs and tissues and ultimately results in death due to heart failure, renal failure and cerebrovascular accidents. Many studies are focused in diagnosing FD through measurement of α-Gal A activity in blood and o

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13

黃千沂. "Application of Dabsylhydrazine in the chromatographic determination of n-hexane metabolites by thin-layer and high-performance liquid chromatography." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/90615194007853304645.

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14

Huang, Chih Hao, and 黃致豪. "A low-cost, high-performance ultra-thin layer chromatography/surface-enhanced Raman spectroscopy multifunctional chip for biochemical rapid screening." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/19498320915755548973.

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15

Akkad, Rami [Verfasser]. "Determination of organophosphorus and carbamate insecticides in food samples by high-performance thin-layer chromatography multi-enzyme inhibition assay / vorgelegt von Rami Akkad." 2011. http://d-nb.info/1011981904/34.

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16

Пуховська, Ірина Миколаївна. "Ідентифікація та кількісне визначення пестицидів у судово-медичній практиц". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/1891.

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Пуховська І. М. Ідентифікація та кількісне визначення пестицидів у судово-медичній практиці : кваліфікаційна робота магістра спеціальності 102 "Хімія" / наук. керівник Т. В. Панасенко. Запоріжжя : ЗНУ, 2020. 60 с.<br>UA : В роботі 60 сторінок, 9 таблиць, 10 рисунків, було використано 42 літературних джерела, з них 9 іноземною мовою. Об’єкт дослідження –пестициди, фосфаті у біологічних рідинах людей, які постраждали від отруєння. Предмет дослідження – тонкошарова, газорідинна, високоефективна рідинна хроматографії. Метою даної роботи є ідентифікація та кількісне визначення пестицидів у б

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17

Vojta, Jiří. "Využití kapalinové chromatografie ve farmaceutické analýze a příprava monolitických stacionárních fází pro tenkovrstvou chromatografii." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-351678.

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(EN) In the first part of this work, analytical methods for determination of impurities of active pharmaceutical ingredients (API) in combined pharmaceutical dosage forms were developed and validated. Development of the methods covered both the optimization of sample preparation procedure and chromatographic conditions. The methods were validated according to International Conference on Harmonization guideline and both of them were confirmed to be able to analyze stability samples. Impurities in paracetamol, codeine phosphate hemihydrate and pitophenone hydrochloride in the presence of fourth

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18

Mikulecká, Jana. "Vývoj analytických metod pro stanovení fosforylovaných složek bakteriálních buněčných membrán." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-324659.

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Phospholipids are dominant components of bacterial cell membranes, where they create double layers. Bacteria differ in their phospholipid composition determination of which can help in identification of important groups of microorganisms. Phospholipid composition of bacteria is influenced by many environmental factors, therefore its variation can be observed within one bacterial stem also. Because of its simplicity, thin layer chromatography is usually applied to identification and determination of bacterial phospholipids. Disadvantage

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