Relevant bibliographies by topics / Alkaloids – Separation

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Academic literature on the topic 'Alkaloids – Separation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Alkaloids – Separation"

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Yatsimirsky, Anatoly K. "Host-Guest Chemistry of Alkaloids." Natural Product Communications 7, no. 3 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700320.

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Binding of alkaloids by different hosts (native and modified cyclodextrins, cucurbiturils, calixarenes, and metal complexes of porphyrin and Salphen-type ligands), as well as receptor properties of alkaloid based hosts are reviewed. With alkaloids as guests, the largest binding constants and most significant spectral changes, in particular strong fluorescence enhancements induced by complexation with isoquinoline alkaloids, are observed with cucurbituril hosts. Cyclodextrins are successfully employed for improvement of solubility and for chiral separation of alkaloids of different types. Recep
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Petruczynik, Anna. "Analysis of alkaloids from different chemical groups by different liquid chromatography methods." Open Chemistry 10, no. 3 (2012): 802–35. http://dx.doi.org/10.2478/s11532-012-0037-y.

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AbstractAlkaloids are biologically active compounds widely used as pharmaceuticals and synthesised as secondary methabolites in plants. Many of these compounds are strongly toxic. Therefore, they are often subject of scientific interests and analysis. Since alkaloids — basic compounds appear in aqueous solutions as ionized and unionized forms, they are difficult for chromatographic separation for peak tailing, poor systems efficiency, poor separation and poor column-to-column reproducibility. For this reason it is necessity searching of more suitable chromatographic systems for analysis of the
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Slavík, Jiří, and Leonora Slavíková. "Quaternary Alkaloids from Thalictrum minus subsp. elatum (JACQ.) STOY. et STEFANOV." Collection of Czechoslovak Chemical Communications 57, no. 3 (1992): 573–78. http://dx.doi.org/10.1135/cccc19920573.

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Quaternary alkaloids berberine (chloride, 0.18%) and, after transformation into the iodides, magnoflorine (iodide, 1.06%), jatrorrhizine (iodide, 0.066%), thalphenine (iodide, 0.040%) and thalifendine (iodide, 0.021%) were isolated, after separation of the tertiary bases (0.38%) from the root of Thalictrum minus subsp. elatum (JACQ.) STOJ. et STEFANOV of Czechoslovak origin (1.8% alkaloid content). The aerial parts (0.013% alkaloids) in their quaternary fraction contain only negligible amounts of magnoflorine, berberine, and coptisine (which is the first time coptisine was found in the Thalict
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Kopp, Thomas, Liesa Salzer, Mona Abdel-Tawab, and Boris Mizaikoff. "Efficient Extraction of Pyrrolizidine Alkaloids from Plants by Pressurised Liquid Extraction – A Preliminary Study." Planta Medica 86, no. 01 (2019): 85–90. http://dx.doi.org/10.1055/a-1023-7419.

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AbstractPyrrolizidine alkaloids and their corresponding pyrrolizidine alkaloid-N-oxides are secondary plant constituents that became the subject of public concern due to their hepatotoxic, pneumotoxic, genotoxic, and cytotoxic effects. In contrast to the well-established analytical separation and detection methods, only a few studies have investigated the extraction of pyrrolizidine alkaloids/pyrrolizidine alkaloid-N-oxides from plant material. In this study, we have applied pressurized liquid extraction with the aim of evaluating the effect of various parameters on the recovery of pyrrolizidi
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AL-Khateeb, Iqbal Hasan. "A New Method for the Isolation and Purification of Trigonelline as Hydrochloride from Trigonella foenum-graecum L." Baghdad Science Journal 16, no. 3 (2019): 0550. http://dx.doi.org/10.21123/bsj.2019.16.3.0550.

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Separation of Trigonelline, the major alkaloid in fenugreek seeds, is difficult because the extract of these seeds usually contains Trigonelline, choline, mucilage, and steroidal saponins, in addition to some other substances. This study amis to isolate the quaternary ammonium alkaloid (Trigonelline) and choline from fenugreek seeds (Trigonella-foenum graecum L.) which have similar physiochemical properties by modifying of the classical method. Seeds were defatted and then extracted with methanol. The presence of alkaloids was detected by using Mayer's and Dragendorff's reagents. In this work,
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Correa, Diana Isabel, Edgar Pastene-Navarrete, Luis Bustamante, Marcelo Baeza, and Julio Alarcón-Enos. "Isolation of Three Lycorine Type Alkaloids from Rhodolirium speciosum (Herb.) Ravenna Using pH-Zone-Refinement Centrifugal Partition Chromatography and Their Acetylcholinesterase Inhibitory Activities." Metabolites 10, no. 8 (2020): 309. http://dx.doi.org/10.3390/metabo10080309.

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Preparative separation of three lycorine type alkaloids from Rhodolirum speciosum (Amaryllidaceae) was successfully carried out using pH-zone-refinement centrifugal partition chromatography (CPC) using the solvent system methyl-tert-butyl ether/acetonitrile/water (4:1:5, v/v/v) in descending mode. Using this system, Alkaloid 1 (165.7 mg, 88.2%, purity), 2 (60.1 mg, 97.7% purity) and 3 (12.3 mg, 84.4% purity) were obtained in one step. For structure elucidation, the pure alkaloids were subjected to spectroscopy analysis using nuclear magnetic resonance experiments (1H-NMR, 13C-NMR) and gas chro
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ZHANG, Mengting, Dandan GONG, Wanyang SUN, and Guoxiang SUN. "Separation of alkaloids using radial chromatography and its separation efficiency." Chinese Journal of Chromatography 36, no. 10 (2018): 1045. http://dx.doi.org/10.3724/sp.j.1123.2018.05016.

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Ma, Xiaoli, Hongwei Chen, Sisi Zhu, Pengfei Tu, and Yong Jiang. "Trimeric and Dimeric Carbazole Alkaloids from Murraya microphylla." Molecules 26, no. 18 (2021): 5689. http://dx.doi.org/10.3390/molecules26185689.

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Seventeen new carbazole alkaloid derivatives, including a trimeric carbazole racemate, (±)-microphyltrine A (1), 15 dimeric carbazole racemates, (±)-microphyldines A–O (2–16), and a C-6–C-3″-methyl-linked dimeric carbazole, microphyldine P (17), were isolated from the leaves and stems of Murraya microphylla (Merr. et Chun) Swingle. The structures of the new compounds were elucidated on the basis of HRESIMS and NMR data analysis. The optically pure isomers of these isolated carbazole alkaloids were obtained by chiral HPLC separation and their absolute configurations were determined by electroni
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Sivagnanam, Kumaran, Emy Komatsu, Susan Patrick, Christoph Rampitsch, Hélène Perreault, and Tom Gräfenhan. "Rapid Screening of Ergot Alkaloids in Sclerotia by MALDI-TOF Mass Spectrometry." Journal of AOAC INTERNATIONAL 99, no. 4 (2016): 895–98. http://dx.doi.org/10.5740/jaoacint.16-0117.

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Abstract Ergot is a common disease of wheat and other cereal grains that is predominantly caused by Claviceps purpurea in the field, often affecting crop yield in addition to the environment. Infected grain can be contaminated with dark sclerotia, which contain fungal metabolites such as ergot alkaloids. The occurrence of ergot alkaloids in cereal grain is a major health concern for humans and livestock. Effective and rapid screening of these mycotoxins is crucial for producers, processors, and consumers of cereal-based food and feed grain. Established methods of ergot alkaloid screening based
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Dymek, Aleksandra, Jarosław Widelski, Krzysztof Kamil Wojtanowski, Paulina Płoszaj, Rostyslav Zhuravchak, and Tomasz Mroczek. "Optimization of Pressurized Liquid Extraction of Lycopodiaceae Alkaloids Obtained from Two Lycopodium Species." Molecules 26, no. 6 (2021): 1626. http://dx.doi.org/10.3390/molecules26061626.

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Alkaloids of the Lycopodiaceae family are of great interest to researchers due to their numerous properties and wide applications in medicine. They play a very important role mainly due to their potent antioxidant, antidepressant effects and a reversible ability to inhibit acetylcholinesterase (AChE) enzyme activity. This property is of immense importance due to the growing problem of an increasing number of patients with neurodegenerative diseases in developed countries and a lack of effective and efficient treatment for them. Numerous studies have shown that Lycopodiaceae alkaloids are a ric
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Dissertations / Theses on the topic "Alkaloids – Separation"

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Tsurubou, Shigekazu. "Studies on Separation Method Using the Interactions between Cinchona Alkaloids and Optical Isomers." 京都大学 (Kyoto University), 1991. http://hdl.handle.net/2433/168808.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・論文博士<br>理学博士<br>乙第7443号<br>論理博第1129号<br>新制||理||737(附属図書館)<br>UT51-91-E220<br>(主査)教授 松井 正和, 教授 花井 哲也, 教授 大野 惇吉<br>学位規則第5条第2項該当
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Spáčil, Zdeněk. "Mass Spectrometry of Biologically Active Small Molecules : Focusing on polyphenols, alkaloids and amino acids." Doctoral thesis, Stockholms universitet, Institutionen för analytisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-33233.

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The foci of this dissertation are on advanced liquid chromatography (LC) separation and mass spectrometry (MS) techniques for the analysis of small bioactive molecules. In addition to discussing general aspects of such techniques the results from analyses of polyphenols (PPs), alkaloids and amino acids published in five appended studies are presented and discussed. High efficiency and well understood principles make LC the method of choice for separating analytes in many kinds of scientific investigations. Moreover, when LC is coupled to an MS instrument, analytes are separated in two stages:
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Wu, An-Cheng, and 吳安正. "Part I:1.Analysis of BBI Alkaloids by HPLC 2.Capillary Electrophoretic Separation of BBI Alkaloids Part II:Analysis of Fluoroquinolone Antibacterials by Capillary Electrophoresis." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/80143281584352045309.

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碩士<br>國立臺灣大學<br>藥學系<br>85<br>This thesis is composed of two parts:Part I : 1. Analysis of Bisbenzylisoquinoline Alkaloids by High Performance Liquid Chromatography2. Capillary Electrophoretic Separation of Bisbenzylisoquinoline AlkaloidsPart II : Analysis of Fluoroquinolone Antibacterials by Capillary ElectrophoresisPart I1. Analysis of Bisbenzylisoquinoline Alkaloids by High Performance Liquid ChromatographyA well-resolved high- performance liquid chromatographic method has been developed
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Chen, li-yun, and 陳麗雲. "I. Analysis of aporphine alkaloids by micellar electrokinetic chromatography II. Optimization of capillary electrophoretic separation of the quinolone antibacterials." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/08688067615966121419.

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碩士<br>國立臺灣大學<br>藥學研究所<br>84<br>The aim of the part I of the thesis was to develop a rapid capi- llary electrophoretic method for the analysis of aporphine alka- loids from lauroaceous plants. Micellar electrokinetic chromato- graphic mode of capillary electrophoresis was used to separate nine aporphine alkaloids: lindcarpine, N-methyllindcarpine, boldine, norpredicentrine, isocorydine, laurotetanine, N-methyl- laurotetanine and isoboldine which had been isolated from some lauroaceous
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hua, Kuo ching, and 郭錦樺. "Separation of bisbenzylisoquinoline alkaloids in dehaasia triandra merr,lignans in phyllanthus plants,and anthraquinones and bianthrones in rhubarb by micellar electrokinetic chromatography." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/87824638477536887563.

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Books on the topic "Alkaloids – Separation"

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Farquharson, A. C. Ptomaines And Other Animal Alkaloids: Their Detection, Separation And Clinical Features. Kessinger Publishing, LLC, 2007.

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Farquharson, A. C. Ptomaines And Other Animal Alkaloids: Their Detection, Separation And Clinical Features. Kessinger Publishing, LLC, 2007.

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Book chapters on the topic "Alkaloids – Separation"

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Cai, D. G., M. J. Gu, G. P. Zhu, et al. "Separation of Three Alkaloids fromSenecio fuberiHemsl by High-Speed Countercurrent Chromatography." In ACS Symposium Series. American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0593.ch007.

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Petroski, Richard J., and Richard G. Powell. "Preparative Separation of Complex Alkaloid Mixture by High-Speed Countercurrent Chromatography." In ACS Symposium Series. American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0449.ch031.

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Ilisz, István, Attila Bajtai, Antal Péter, and Wolfgang Lindner. "Cinchona Alkaloid-Based Zwitterionic Chiral Stationary Phases Applied for Liquid Chromatographic Enantiomer Separations: An Overview." In Methods in Molecular Biology. Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9438-0_14.

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Verpoorte, R. "ALKALOIDS | Liquid Chromatography." In Encyclopedia of Separation Science. Elsevier, 2000. http://dx.doi.org/10.1016/b0-12-226770-2/01421-6.

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Muzquiz, M. "ALKALOIDS | Gas Chromatography." In Encyclopedia of Separation Science. Elsevier, 2000. http://dx.doi.org/10.1016/b0-12-226770-2/02561-8.

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Flieger, J. "ALKALOIDS | Thin-Layer (Planar) Chromatography." In Encyclopedia of Separation Science. Elsevier, 2000. http://dx.doi.org/10.1016/b0-12-226770-2/02591-6.

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Yang, Fuquan, and Yoichiro Ito. "Alkaloids: Separation by Countercurrent Chromatography." In Encyclopedia of Chromatography. CRC Press, 2005. http://dx.doi.org/10.1201/noe0824727857-11.

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"Separation of Alkaloids by Countercurrent Chromatography." In Encyclopedia of Chromatography 2004 Update Supplement. CRC Press, 2004. http://dx.doi.org/10.1201/9781482298574-43.

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Van Thi Nguyen, Ngoc, Kim Ngan Huynh Nguyen, Kien Trung Nguyen, Kyeong Ho Kim, and Hassan Y. Aboul-Enein. "Chiral Alkaloid Analysis." In Current Topics in Chirality - From Chemistry to Biology. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96009.

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Alkaloids are distributed in plant kingdom and play important role in protection, germination as well as plant growth stimulants. Most of them are chiral compounds and are clinically administered as the racemic mixture, even though its enantiomers have been known to exert different pharmacological activity. Liquid chromatography using chiral stationary phases (CSP) proved to be an essential tool with a wide range of applications, including analysis of the stereochemistry of natural compounds. This review gives an overview of chiral separation alkaloids that were used in theoretical studies and/or applications in recent years. It shows the possibilities of polysaccharide CSPs have now also been established as the first-choice of chiral phases for enantiomer separation.
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Molyneux, Russell, Kip Panter, and Stephen Lee. "Separation of Enantiomeric Mixtures of Alkaloids and Their Biological Evaluation." In Bioactive Natural Products. CRC Press, 2007. http://dx.doi.org/10.1201/9781420006889.ch7.

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