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Journal articles on the topic 'Flash column chromatography'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Sandesh, J. Srikanth Sandesh, Shyamala, Kurva Swapana, Sirra Balaiah, and J. V. C. Sharma. "A REVIEW ON FLASH CHROMATOGRAPHY AND ITS PHARMACEUTICAL APPLICATIONS." Journal of Biomedical and Pharmaceutical Research 10, no. 1 (2021): 120–24. http://dx.doi.org/10.32553/jbpr.v10i1.850.

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Earlier column chromatography was used for preparative purposes as well as for reaction control in organic synthesis. Column chromatography is an extremely tedious stage in any laboratory and can quickly become a point of congestion for any process lab. Flash chromatography is a technique developed as a modification of preparative column chromatography. This is an air pressure driven technique comprising of medium and short column chromatography, optimised for rapid separation of organic compounds. Modern flash chromatographic system consists of pre- packed plastic cartridges where in the solv

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2

Ramesh, Dattatraya Bhusal* Deepali Mahir Nahar Prashant Bhimrao Dalvi. "REVIEW ON: FLASH COLUMN CHROMATOGRAPHY." INDO AMERICAN JOURNAL OF PHARMACEUTICAL RESEARCH 07, no. 01 (2017): 7353–58. https://doi.org/10.5281/zenodo.1006789.

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In previous days, Column chromatography was used for qualitative as well as quantitative analysis but Column chromatography is an extremely time consuming process. This leads to the development of novel preparative liquid chromatography in which mobile phase flows down by positive air pressure called as Flash chromatography. Flash Chromatography is a rapid form of preparative column chromatography. Flash chromatography, also known as medium pressure chromatography, was popularized several years ago by Clark Still of Columbia University, as an alternative to slow and often inefficient gravity-f

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3

Shusterman, Alan J., Patrick G. McDougal, and Arthur Glasfeld. "Dry-Column Flash Chromatography." Journal of Chemical Education 74, no. 10 (1997): 1222. http://dx.doi.org/10.1021/ed074p1222.

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4

Mekapothula, Subbareddy, A. D. Dinga Wonanke, Matthew A. Addicoat, David J. Boocock, John D. Wallis, and Gareth W. V. Cave. "Supramolecular Chromatographic Separation of C60 and C70 Fullerenes: Flash Column Chromatography vs. High Pressure Liquid Chromatography." International Journal of Molecular Sciences 22, no. 11 (2021): 5726. http://dx.doi.org/10.3390/ijms22115726.

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A silica-bound C-butylpyrogallol[4]arene chromatographic stationary phase was prepared and characterised by thermogravimetric analysis, scanning electron microscopy, NMR and mass spectrometry. The chromatographic performance was investigated by using C60 and C70 fullerenes in reverse phase mode via flash column and high-pressure liquid chromatography (HPLC). The resulting new stationary phase was observed to demonstrate size-selective molecular recognition as postulated from our in-silico studies. The silica-bound C-butylpyrogallol[4]arene flash and HPLC stationary phases were able to separate

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5

Westerbuhr, Sarah G., and Kathy L. Rowlen. "On-column refractive index detector for flash chromatography." Journal of Chromatography A 886, no. 1-2 (2000): 9–18. http://dx.doi.org/10.1016/s0021-9673(00)00488-x.

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6

Murtadha Saleh Hussien and Ayad A. Al-Hamashi. "Phytosterol Profile in Iraqi Lactuca serriola after Purification and Isolation by Combiflash and HPLC (Conference Paper )#." Iraqi Journal of Pharmaceutical Sciences ( P-ISSN 1683 - 3597 E-ISSN 2521 - 3512) 31, Suppl. (2023): 54–61. http://dx.doi.org/10.31351/vol31isssuppl.pp54-61.

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One of these plants utilized in traditional medicine is Lactuca seriolla Linn., which belongs to the Asteraceae family. It goes by a variety of common names in the world, including prickly lettuce, wild lettuce, jagged lettuce, and Kahu and khas. The work aimed to isolate and characterize some bioactive constituent(s) from the aerial part of Lactuca serriola utilizing Combiflash NEXTGEN and high-performance liquid chromatography (HPLC). Lactuca serriola (aerial part) was extracted with 80% ethanol, then fractionated with hexane. Then 250 mg of hexane extract was mixed with 4 g of silica gel an

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7

Fair, Justin D., and Chad M. Kormos. "Flash column chromatograms estimated from thin-layer chromatography data." Journal of Chromatography A 1211, no. 1-2 (2008): 49–54. http://dx.doi.org/10.1016/j.chroma.2008.09.085.

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8

Hande, Pankaj E., Asit B. Samui, and Prashant S. Kulkarni. "A molecularly imprinted polymer with flash column chromatography for the selective and continuous extraction of diphenyl amine." RSC Advances 5, no. 90 (2015): 73434–43. http://dx.doi.org/10.1039/c5ra11965k.

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9

Báez, José E., Kenneth J. Shea, Philip R. Dennison, Armando Obregón-Herrera та José Bonilla-Cruz. "Monodisperse oligo(δ-valerolactones) and oligo(ε-caprolactones) with docosyl (C22) end-groups". Polymer Chemistry 11, № 26 (2020): 4228–36. http://dx.doi.org/10.1039/d0py00576b.

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Two different families of monodisperse oligoesters with α-hydroxyl-ω-docosyl (C<sub>22</sub>) terminal groups [oligo(δ-valerolactone) and oligo(ϵ-caprolactone)] were isolated by flash column chromatography (FCC).

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10

Shi, Xianheng, Min Liu, Lishan Li, et al. "Efficient synthesis of discrete oligo(fluorenediacetylene)s toward chain-length-dependent optical and structural properties." Polymer Chemistry 12, no. 17 (2021): 2598–605. http://dx.doi.org/10.1039/d1py00165e.

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A series of discrete oligo(fluorenediacetylene)s with a degree of polymerization up to 10 were obtained by automated flash column chromatography, which indicated the chain-length dependent photophysical properties and crystalline behavior.

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11

Haven, Joris J., and Tanja Junkers. "Quasi-monodisperse polymer libraries via flash column chromatography: correlating dispersity with glass transition." Polymer Chemistry 10, no. 6 (2019): 679–82. http://dx.doi.org/10.1039/c8py01603h.

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Quasi-monodisperse (Đ = 1.005–1.040) poly(methyl) acrylate (PMA) polymer libraries are obtained via flash column chromatography separation of disperse (Đ = 1.130) PMA. The influence of dispersity on the glass transition is investigated.

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12

D. Senzer, Benjamin. "OS Techniques Purification of Organic Compounds by Flash Column Chromatography." Organic Syntheses 102 (2025): 276–302. https://doi.org/10.15227/orgsyn.102.0276.

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13

Mahmiah, Mahmiah. "ISOLATION AND IDENTIFICATION FLAVONOID COMPOUND FROM THE STEM BARK OF Saccopetalum horsfieldii BENN." Indonesian Journal of Chemistry 6, no. 3 (2010): 312–15. http://dx.doi.org/10.22146/ijc.21738.

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Isolation and identification flavonoid compound from the stem bark of Indonesian plant Saccopetalum horsfieldii Benn. Annonaceae family have been done. Extraction was carried out by maseration method using methanol at room temperature, the product was then extracted by n-hexane and etil acetate. Etil acetate extract separation carried out by liquid vacuum column chromatography and flash column chromatography. The product purificated by recristalization using acetone p.a. into yellow solid that having melting point of 224-226 °C. The structure of flavonoid compound was determinated by spectrosc

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14

Tzima, Katerina, Gontorn Putsakum, and Dilip K. Rai. "Antioxidant Guided Fractionation of Blackberry Polyphenols Show Synergistic Role of Catechins and Ellagitannins." Molecules 28, no. 4 (2023): 1933. http://dx.doi.org/10.3390/molecules28041933.

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In the present study, blackberry extract was prepared using a previously optimized solid–liquid extraction method in 70% aqueous acetone aimed at the recovery of its principal phenolics. Subsequently, 0.5 g of freeze-dried extract was subjected to flash chromatography fractionation, which was conducted on a C18 column using a binary solvent system of water and methanol at 10 mL/min. The total phenolic content (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing antioxidant power (FRAP) activities of the obtained 42 flash fractions were determined, and a strong positive correlation

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15

Saydut, Abdurrahman, Yalcin Tonbul, and Candan Hamamci. "Liquefaction of Harbul (Silopi SE Anatolia, Turkey) Asphaltite by Flash Pyrolysis." Energy Exploration & Exploitation 26, no. 1 (2008): 23–34. http://dx.doi.org/10.1260/014459808784305815.

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Asphaltite, being petroleum originated solid fossil fuel, can be converted into a variety of secondary products such as light hydrocarbon gases, liquid product and high quality fuel char by means of pyrolysis. Liquefaction of Harbul (Silopi, Turkey) asphaltite,-0.60+0.25 mm particle size, and using flash pyrolysis was performed in a fixed bed reactor with a heating rate 40°C min−1 at a temperature ranging from 400 to 800°C under nitrogen atmosphere. The effect of temperature on conversion and liquid yield was examined. The flash pyrolysis temperature resulted in a large increase in the oil yie

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16

Kasprowiak, Amaury, Francine Cazier-Dennin, and Pierre-Edouard Danjou. "Flash Chromatography System: A Practical Tool for Demonstrating the Influence of Column Characteristics on Chromatographic Resolution." Journal of Chemical Education 97, no. 4 (2020): 1145–50. http://dx.doi.org/10.1021/acs.jchemed.9b00929.

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17

Compton, David L., Michael Appell, James A. Kenar, and Kervin O. Evans. "Enzymatic Synthesis and Flash Chromatography Separation of 1,3-Diferuloyl-sn-Glycerol and 1-Feruloyl-sn-Glycerol." Methods and Protocols 3, no. 1 (2020): 8. http://dx.doi.org/10.3390/mps3010008.

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Ethyl ferulate was transesterified with Enova Oil (a soy-based vegetable oil containing 80–85% diacylglycerol) using Novozym 435 at 60 °C. The resultant feruloylated vegetable oil reaction product produced a precipitate (96.4 g, 4.02 wt%) after 7 d of standing at room temperature. Preliminary characterization of the precipitate identified the natural phenylpropenoids 1,3-diferuloyl-sn-glycerol (F2G) and 1-feruloyl-sn-glycerol (FG) as the major components. A flash chromatography method was developed and optimized (e.g., mass of sample load, flow rate, binary solvent gradient slope, and separati

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18

Zhang, Zhenhua, Guanyu Qiao, Zhen Zhang, Baoliang Huang, Liu Zhu, and Fan Xiao. "Palladium-Catalyzed One-Pot Synthesis of N-Sulfonyl, N-Phosphoryl, and N-Acyl Guanidines." Synthesis 50, no. 02 (2017): 330–40. http://dx.doi.org/10.1055/s-0036-1588576.

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An efficient palladium-catalyzed cascade reaction of azides with isonitrile and amines is presented; it offers an alternative facile approach toward N-sulfonyl-, N-phosphoryl-, and N-acyl-functionalized guanidines in excellent yield. These series of substituted guanidines exhibit potential biological and pharmacological activities. In addition, the less reactive intermediate benzoyl carbodiimide could be isolated by silica gel column flash chromatography in moderate yield.

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19

DeMilo, A. B., C. J. Lee, R. F. W. Schroder, W. F. Schmidt, and D. J. Harrison. "Spectral Characterization of Cucurbitacins in a Bitter Mutant of Hawkesbury Watermelon (Citrullus vulgaris Schrad) that Elicit a Feeding Response to Diabroticite Beetles (Coleoptera: Chrysomelidae)2." Journal of Entomological Science 33, no. 4 (1998): 343–54. http://dx.doi.org/10.18474/0749-8004-33.4.343.

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Fractions obtained by open-column flash chromatography of a crude methanolic extract of the rind of a bitter mutant of Hawkesbury watermelon, Citrullus vulgaris Schrad, were further purified by preparative high-performance liquid chromatography (HPLC) to isolate chemical component(s) that elicit a visitation/feeding stimulancy response to the southern corn rootworm, Diabrotica undecimpunctata howardi Barber. Activity of chromatographic fractions were followed with a laboratory bioassay involving total insect-response counts. The chemical structure of the most active component in C. vulgaris wa

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20

Maharani, Rani, Ace Tatang Hidayat, Dadan Sumiarsa, Achmad Zainuddin, and Ika Wiani Hidayat. "RESOLUTION OF A RACEMIC ISOLEUCINE MIXTURE BY USING METHYL L-MANDELATE." Chimica et Natura Acta 4, no. 3 (2016): 156. http://dx.doi.org/10.24198/cna.v4.n3.10991.

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A methyl ester of L-mandelic acid was found to be an effective resolving agent for resolution of commercial DL-isoleucine. The resolution was based on Steglich esterification between methyl L-mandelate and Boc-DL-isoleucine. The two resolved isomers were easily separated by using a conventional flash-column chromatography, giving quantitatively good yields. Unfortunately, the methyl L-mandelate was found to be ineffective to resolve four stereoisomers of Fmoc- isoleucine.

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21

Falsone, G., F. Cateni, E. Vrech, et al. "Triacylglycerols, Fucosterol, Diacylglyceroglycolipids and Fucoxanthin from Fucus virsoides." Zeitschrift für Naturforschung B 49, no. 9 (1994): 1297–304. http://dx.doi.org/10.1515/znb-1994-0923.

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From the marine brown macroalga Fucus virsoides J. AG. (Fucales, Phaeophyceae), a mixture of triacylglycerols 1 -3, fucosterol 4, a mixture of galactosyldiacylglycerols 5-8 and fucoxanthin 9 have been isolated. Normal phase column flash chromatography was effective for the isolation of the marine compounds. FAB-MS, CI-MS spectrometry, 1H NMR, 13C NMR, 1H-1H COSY and 1H-13C COSY experiments were useful in providing informations for their structure elucidation

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22

Duckworth, Owen W., Dawn S. Markarian, Dorothy L. Parker, and James M. Harrington. "A two-column flash chromatography approach to pyoverdin production from Pseudomonas putida GB1." Journal of Microbiological Methods 135 (April 2017): 11–13. http://dx.doi.org/10.1016/j.mimet.2017.01.019.

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23

Saini, Pooja, Ekta Menghani, and Rekha Mithal. "Isolation and Identification of Pure Bioactive Compounds from Cuscuta reflexa Grown on Nerium oleander Host Plant by Flash Column Chromatography and GC-MS/MS Analysis." Asian Journal of Chemistry 32, no. 10 (2020): 2486–88. http://dx.doi.org/10.14233/ajchem.2020.22664.

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In this work, an ethyl acetate extract of Cuscuta reflexa grown on Nerium oleander host plant was used for the isolation and identification of pure bioactive compounds. Chloroform:methanol was used as mobile phase for flash column chromatography. Five pure bioactive compounds were isolated and two compounds were identified using GC-MS/MS technique. Glycerol-1-palmitate and squalene were identified in Cuscuta reflexa using NIST library on the basis of area percentage.

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24

Xue, Min, Yu Wang, Zihui Meng, Weibing Zhang, Yin Wu, and Shikuan Jiang. "EXTRACTION OF SHIKIMIC ACID FROM CHINESE STAR ANISE USING FLASH COLUMN CHROMATOGRAPHY ON A MOLECULARLY-IMPRINTED POLYMER COLUMN." Journal of Liquid Chromatography & Related Technologies 36, no. 19 (2013): 2677–86. http://dx.doi.org/10.1080/10826076.2012.725690.

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25

Cvetković, Mirjana, Ana Damjanović, Tatjana P. Stanojković, et al. "Integration of dry-column flash chromatography with NMR and FTIR metabolomics to reveal cytotoxic metabolites from Amphoricarpos autariatus." Talanta 206, Jan 1 (2020): 120248. https://doi.org/10.1016/j.talanta.2019.120248.

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Metabolomics generate a profile of small molecules from plant extracts, which could be directly responsible for bioactivity effects. Using dry-column flash chromatography enabled a rapid and inexpensive method for the very efficient separation of plant extract with a high resolution. This separation method coupled to NMR and FTIR-based metabolomics is applied to identify bioactive natural products. OPLS multivariate analysis method, was used for correlation the chemical composition of the plant extracts, Amphoricarpos autariatus, with the results of cytotoxic activity against Human cervical ad

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26

Sapar, Ajuk, Millenia Millenia, Anthoni Batahan Aritonang, Rudiyansyah Rudiyansyah, and Winda Rahmalia. "Characterization of Secondary Metabolites and Cytotoxic Assay of Haliclona sp. Sponge Against T47D Breast Cancer Cells." al-Kimiya 10, no. 1 (2023): 40–49. http://dx.doi.org/10.15575/ak.v10i1.20334.

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Characterization of secondary metabolites and cytotoxic testing of Haliclona sp. against T47D breast cancer cells were conducted in this study. The objective was to assess the cytotoxicity of T47D cancer cells and identify the functional groups involved. The research methods employed included maceration, partitioning, phytochemical testing, toxicity testing using the BSLT method, separation through flash column chromatography (FCC), cytotoxic testing using the MTT method, and characterization using FTIR. The partition results of methanol extract consist of n-hexane, ethyl acetate, and methanol

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27

Winata, I. Nyoman Adi, Achmad Sjaifullah, Dita J. Cahyani, and Woro D. Ayu. "Onoceranoid Triterpene from Langsep Leaf (Lansium domesticum Corr.) and Its Insecticide Activity to Spodoptera littura Larvae." Jurnal ILMU DASAR 18, no. 1 (2017): 9. http://dx.doi.org/10.19184/jid.v18i1.3110.

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   Onoceranoide type of triterpene was isolated from leaf of langsep (Lansium domesticum Corr.) Isolation is conducted by vacuum and flash column chromatography technics with Silika Gel 60 F, Silika Gel 60 (70-230 mesh), and Sephadex LH-20 powder as stationery phase and mixture of dichloromethane, methanol, ethyl acetate as mobile phase. The structure was identified by Infrared and NMR spectroscopy. It has moderate insecticidal activity to Spodoptera littura larvae with LC50 13,6 ppm.   

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28

Shah, Muhammad Dawood, Kazuki Tani, Yoong Soon Yong, et al. "Antiparasitic Potential of Chromatographic Fractions of Nephrolepis biserrata and Liquid Chromatography-Quadrupole Time-of-Flight-Mass Spectrometry Analysis." Molecules 26, no. 2 (2021): 499. http://dx.doi.org/10.3390/molecules26020499.

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Marine aquaculture development is recently impeded by parasitic leech Zeylanicobdellaarugamensis (Hirudinea, Piscicolidae) in Sabah, Malaysia. The parasitic leech infests a variety of cultured fishes in aquaculture facilities. In this study, we evaluated the antiparasitic activity of the chromatographic fractions of the medicinal plant Nephrolepis biserrata methanol extract against Z.arugamensis and highlighted the potential metabolites responsible for the antiparasitic properties through liquid chromatography (LC)–quadrupole time-of-flight (QTOF)–mass spectrometry (MS) analysis. Out of seven

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29

Wang, Yichun, Violet Wert, Muraleedharan Nair, and Stanley Ries. "Isolation and Characterization of a Chemical from Tomato Apices that Stimulates Plant Growth." HortScience 25, no. 7 (1990): 769–71. http://dx.doi.org/10.21273/hortsci.25.7.769.

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A methanol: water extract of tomato (Lycopersion esculentum Mill.) apices increased the growth of the alga Chlamydomonas reinhardtii. The active substance from the dried shoot apices was purified by C18 flash column and high performance liquid chromatography. The purified extract enhanced the growth of tomato, corn (Zea mays L.), and rice (Oryza sativa L.) seedlings at concentrations less than 1.0 mg·liter-1. With Chlamydomonas, the purified extract increased cell division 111% at 0.1 mg·liter-1 and chlorophyll content 23% at 10 mg·liter-1 in 18 hours. Nuclear magnetic resonance and mass spect

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30

Shu, Jicheng, Yongqin Yin, and Zhijun Liu. "Integrated Processes Turning Pepper Sauce Waste into Valuable By-Products." Foods 12, no. 1 (2022): 67. http://dx.doi.org/10.3390/foods12010067.

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Background: Safe and efficient disposal of millions of tons of pepper sauce waste (PSW) can be a challenge to pepper sauce manufacturers that are concerned about creating environmental hazards from the processing (e.g., preservative salt and vinegar) and intrinsic (e.g., the pungent capsaicins) ingredients. It will be immensely beneficial to process these waste materials before they go to disposal. This work presents integrated approaches for a complete utilization of waste materials by removing and recovering valuable by-products and/or ingredients while succeeding to minimal to zero hazards.

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31

Wu, Yong-Jiang, Qi-Yuan Shi, Hou-Liang Lei, Ye Jin, Xue-Song Liu, and Lian-Jun Luan. "Simple and efficient preparation of 3,6′-disinapoylsucrose from Polygalae Radix via column chromatographic extraction and reversed-phase flash chromatography." Separation and Purification Technology 135 (October 2014): 7–13. http://dx.doi.org/10.1016/j.seppur.2014.07.052.

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32

Alqarni, Abdulmalik, Valerie Ferro, John Parkinson, Mark Dufton, and David Watson. "Effect of Melittin on Metabolomic Profile and Cytokine Production in PMA-Differentiated THP-1 Cells." Vaccines 6, no. 4 (2018): 72. http://dx.doi.org/10.3390/vaccines6040072.

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Melittin, the major active peptide of honeybee venom (BV), has potential for use in adjuvant immunotherapy. The immune system response to different stimuli depends on the secretion of different metabolites from macrophages. One potent stimulus is lipopolysaccharide (LPS), a component isolated from gram-negative bacteria, which induces the secretion of pro-inflammatory cytokines in macrophage cell cultures. This secretion is amplified when LPS is combined with melittin. In the present study, pure melittin was isolated from whole BV by flash chromatography to obtain pure melittin. The ability of

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33

Carignan, Germain, Karen Carrier, and Stephen Sved. "Assay of Oxytetracycline Residues in Salmon Muscle by Liquid Chromatography with Ultraviolet Detection." Journal of AOAC INTERNATIONAL 76, no. 2 (1993): 325–28. http://dx.doi.org/10.1093/jaoac/76.2.325.

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Abstract A novel method for the assay of oxytetracycline residues in salmon muscle is described. Tissue is homogenized with 4 volumes of 1 % metaphosphoric acid in the presence of a small amount of dichloromethane (0.4 volume), shaken, and centrifuged. The residue is washed twice (4 and 2 volumes, respectively) with 1 % metaphosphoric acid, and the combined aqueous supernatants are concentrated to about 2 mL by flash evaporation and then diluted to 5 mL. Filtered aliquots of the extract are subjected to liquid chromatography using a C18 column with a mobile phase of acetonitrile-tetrahydrofura

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Marliyana, Surya Dewi, Fajar Rakhman Wibowo, Desi Suci Handayani, et al. "Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark." Jurnal Kimia Sains dan Aplikasi 24, no. 4 (2021): 108–13. http://dx.doi.org/10.14710/jksa.24.4.108-113.

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Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark. Calophyllum soulattri Burm. F. has been widely used for herbal medicine. Phytochemical investigation of C. soulattri contains a secondary metabolite of the steroid class. Steroid compounds have various biological activities, such as anti-inflammatory, antioxidant, antiproliferative, antibacterial, antimalarial, and anticancer. Two secondary metabolites steroids have been isolated and identified from the stem bark extract of C. soulattri. Isolation was carried out through the extraction (maceration

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35

Cselőtey, Anna, Márton Baglyas, Nóra Király, et al. "Bioassay-Guided Isolation and Identification of Antibacterial Compounds from Invasive Tree of Heaven Stem and Trunk Bark." Molecules 29, no. 24 (2024): 5846. https://doi.org/10.3390/molecules29245846.

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Flash column chromatographic fractionation of tree of heaven (Ailanthus altissima) stem and trunk bark extracts, guided by thin-layer chromatography (TLC)–Bacillus subtilis assay and TLC–heated electrospray high-resolution tandem mass spectrometry (HESI-HRMS/MS), lead to the isolation of six known compounds: (9Z,11E)-13-hydroxy-9,11-octadecadienoic acid (13-HODE, A1), (10E,12Z)-9-hydroxy-10,12-octadecadienoic acid (9-HODE, A2), hexadecanedioic acid (thapsic acid, A3), 16-hydroxyhexadecanoic acid (juniperic acid, A4), 16-feruloyloxypalmitic acid (alpinagalanate, A5), and canthin-6-one (A6). The

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36

Perich, JW, and RB Johns. "Synthesis of Casein-Related Peptides and Phosphopeptides. VI. The Efficient Global 'Phosphite-Triester' Phosphorylation of Multiple-Serine-Containing Peptides by Using Dibenzyl N,N-Diethylphosphoramidite." Australian Journal of Chemistry 43, no. 10 (1990): 1633. http://dx.doi.org/10.1071/ch9901633.

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The peptide Ac-Ser(P)- NHMe and the multiple-Ser(P)-containing peptides Ac-Ser(P)-Ser(P)- NHMe and Ac-Ser(P)-Ser(P)-Ser(P)- NHMe were prepared in good yield by a global phosphorylation approach which employed benzyl phosphate protection. The three serine-containing peptides were phosphorylated by the use of dibenzyl N,N-diethylphosphoramidite/1H-tetrazole followed by in situ oxidation of the resultant dibenzyl phosphite-triesters with m- chloroperoxybenzoic acid. The protected Ser(PO3Bzl2)-containing peptides were purified by C18 reverse-phase silica flash column chromatography and the benzyl

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Abdulkhair, Waleed M., and Mousa A. Alghuthaymi. "Production and Characterization of Semi-Quinolone Antibiotic Produced by Streptomyces Griseorubens." Petroleum and Chemical Industry International 5, no. 3 (2022): 137–49. https://doi.org/10.33140/pcii.05.03.01.

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This work is an attempt to overcome antimicrobial resistance problem which dispersed worldwide in particular developing countries due to misuse of antibiotics. Actinobacteria were isolated and screened against selected resistant Gram-negative bacteria to detect the powerful antibacterial activity. Identification of the most potent actinobacterial isolate has been carried out using classical and genetical methods. Antibacterial compound has been extracted, purified and characterized using accurate and more specific techniques and instruments. Among forty actinobacterial isolates, only twenty-tw

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Ummiti, Kumarswamy, and J. V. Shanmukha Kumar. "Determination of Amino Acid Composition of Ganirelix Acetate in an Injectable Formulation by Pre-column Derivatization with 6-Aminoquinolyl-N-hydroxysuccinimidyl Carbamate." Journal of Chromatographic Science 58, no. 8 (2020): 687–94. http://dx.doi.org/10.1093/chromsci/bmaa030.

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Abstract Ganirelix is a synthetic decapeptide linked with nine different amino acids. To understand the peptide amino acid sequence or primary structure, the first step is to determine the amino acid composition of the peptide which can be a determining factor for the peptide immunogenicity. Edman degradation is not a suitable analytical technique to identify amino acid sequence present in Ganirelix due to the absence of uncharged N-terminal amino group. To address this challenge, a pre-column derivatization method was developed with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate reagent. In

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Jassbi, Amir Reza, Marzieh Vafapour, Ardeshir Shokrollahi, et al. "Cytotoxic Activity of Two Cembranoid Diterpenes from Nicotiana Sylvestris Against Three Human Cancer Cell Lines." Open Bioactive Compounds Journal 5, no. 1 (2017): 1–8. http://dx.doi.org/10.2174/1874847301705010001.

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Background: Two cembranoid diterpenes, [(1S, 2E, 4R, 6R, 7E, 11E)-2, 7, 11-cembratriene-4, 6-diol] (1) and its epimer [(1S, 2E, 4S, 6R,7E,11E)-2, 7, 11-cembratriene-4, 6-diol] (2) were isolated from surface dichloromethane washings and chloroform extract of Nicotiana sylvestris leaves. Methods: The compounds were purified using silica gel column- thin layer- and flash column chromatography methods. The structures of the isolated compounds were elucidated using spectroscopic analysis and their 1H and 13C NMR spectroscopic data were compared with those of authentic samples reported in the litera

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Yazdani, Morteza, Anita Barta, Anasztázia Hetényi, et al. "Isolation of the Lanostane Triterpenes Pholiols L–S from Pholiota populnea and Evaluation of Their Antiproliferative and Cytotoxic Activities." Pharmaceuticals 16, no. 1 (2023): 104. http://dx.doi.org/10.3390/ph16010104.

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Pholiols L-S (1–8), eight undescribed triterpenes were isolated from the sporocarps of the mushroom Pholiota populnea. Various chromatographic techniques, such as open column chromatography, flash chromatography, gel filtration, preparative thin layer chromatography, and HPLC, were applied to purify the compounds. The structure elucidation was carried out by spectroscopic analysis, including 1D (1H NMR and 13C JMOD) and 2D NMR (1H-1H COSY, HSQC, HMBC and NOESY) and HRESIMS experiments. The isolated compounds had lanostane (1–7) or trinorlanostane (8) skeletons; all of them were substituted wit

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Negi, J. S., V. K. Bisht, P. Singh, M. S. M. Rawat, and G. P. Joshi. "Naturally Occurring Xanthones: Chemistry and Biology." Journal of Applied Chemistry 2013 (November 14, 2013): 1–9. http://dx.doi.org/10.1155/2013/621459.

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Xanthones are one of the biggest classes of compounds in natural product chemistry. A number of xanthones have been isolated from natural sources of higher plants, fungi, ferns, and lichens. They have gradually risen to great importance because of their medicinal properties. This review focuses on the types, isolation, characterization, biological applications, and biosynthesis of naturally occurring xanthones isolated so far. Different physicochemical and instrumental methods such as liquid-solid and liquid-liquid extraction, TLC, flash chromatography, column chromatography, IR, 1H NMR and 13

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Gbolo, Benjamin Zoawe, Bobette Nkongolo Ciala, Jean-Paul Koto-Te-Nyiwa Ngbolua, et al. "Profilage phytochimique par chromatographie sur couche mince haute performance d’extraits de flavonoïdes totaux du Drepanoalpha® et évaluation de leur activité anti-drépanocytaire in vitro." Annales Africaines de Medecine 16, no. 1 (2022): 4882–98. http://dx.doi.org/10.4314/aamed.v16i1.3.

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Contexte et objectif. Le défi le plus important dans la drépanocytose consiste à améliorer l’état de santé des patients dans les pays en développement. L'une des meilleures solutions est donc le développement de la phytomédecine basée sur la connaissance de la pharmacopée traditionnelle. L’objectif de la présente étude était d’évaluer les activités anti-drépanocytaires des flavonoïdes totaux extraits du phytomédicament Drépanoalpha® d’une part et déterminer leur profilage chimique par chromatographie sur couche mince haute performance d’autre part. Méthodes. Les flavonoïdes totaux ont été obte

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Sakib, Sheikh Adnan, Tania Rahman, Zimam Mahmud, and Md Enamul Haque. "Secondary Metabolites from Terminalia Catappa and Evaluation of its Bioactivities." Bioresearch Communications 9, no. 2 (2023): 1310–19. http://dx.doi.org/10.3329/brc.v9i2.67083.

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Bangladesh is a land of medicinal plants. Terminalia catappa is an important medicinal plant of Bangladesh which is used for various pharmacological and biological activities like hepatoprotective, antioxidant, anti-fertility, antidiabetic, anticoagulant and antimicrobial. The coarsely powder dried stem bark sample of T. catappa was extracted by the solvent CHCl3. The concentrated extract was then fractionated by flash column chromatography using petroleum ether, ethyl acetate and methanol as solvents respectively. The column fraction was further fractionated with void liquid chromatography. R

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Orfanoudaki, Maria, Mostafa Alilou, Anja Hartmann, et al. "Isolation and Structure Elucidation of Novel Mycosporine-like Amino Acids from the Two Intertidal Red Macroalgae Bostrychia scorpioides and Catenella caespitosa." Marine Drugs 21, no. 10 (2023): 543. http://dx.doi.org/10.3390/md21100543.

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This study presents a phytochemical survey of two common intertidal red algal species, Bostrychia scorpioides and Catenella caespitosa, regarding their MAA (mycosporine-like amino acid) composition, which are known as biogenic sunscreen compounds. Six novel MAAs from Bostrychia scorpioides named bostrychines and two novel MAAs from Catenella caespitosa named catenellines were isolated using a protocol which included silica gel column chromatography, flash chromatography on reversed phase material and semipreparative HPLC (High-Performance Liquid Chromatography). The structure of the novel MAAs

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Shibata, Shinya, Chiyoko Ishihara, and Keisuke Matsumoto. "Improved Separation Method for Highly Purified Lutein fromChlorellaPowder Using Jet Mill and Flash Column Chromatography on Silica Gel." Journal of Agricultural and Food Chemistry 52, no. 20 (2004): 6283–86. http://dx.doi.org/10.1021/jf0495901.

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Cvetković, Mirjana, Ana Damjanović, Tatjana P. Stanojković, et al. "Integration of dry-column flash chromatography with NMR and FTIR metabolomics to reveal cytotoxic metabolites from Amphoricarpos autariatus." Talanta 206 (January 2020): 120248. http://dx.doi.org/10.1016/j.talanta.2019.120248.

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Aeinlang, N., T. Srichana, and S. Songkro. "Cholesteryl Cetyl Carbonate as a Smart Material for Drug Delivery Application." Advanced Materials Research 55-57 (August 2008): 713–16. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.713.

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Cholesteryl cetyl carbonate (CCC) was synthesized from cetyl alcohol and cholesteryl chloroformate. Cholesteryl cetyl carbonate mixture (CCCM) was obtained from the reaction. CCCM was purified by liquid-liquid extraction and flash column chromatography. Thermotropic liquid crystal was formed in both pure CCC and CCCM. CCCM is composed of cholesterol, cetyl alcohol and CCC (30:20:50, weight ratio). FTIR and NMR were employed to confirm the functional groups of CCC. Thermal properties of CCC were determined by DSC and polarized light microscope. The phase transition from solid crystal to smectic

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Nowatschin, Vanessa, Christian Näther, and Ulrich Lüning. "Synthesis and crystal structure of allyl 7-(diethylamino)-2-oxo-2H-chromene-3-carboxylate." Acta Crystallographica Section E Crystallographic Communications 77, no. 4 (2021): 331–34. http://dx.doi.org/10.1107/s2056989021002218.

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The title compound, C17H19NO4, was synthesized by the reaction of 7-(diethylamino)-2-oxo-2H-chromene-3-carboxylic acid with allyl bromide and purified by flash column chromatography on silica gel. Crystals suitable for single-crystal X-ray diffraction were obtained by recrystallization from acetone. The aromatic core of the molecule is not planar with the diethylamino group and with the carboxyl group that are rotated out of the 2-oxo-2H-chromene plane by 6.7 (2)° and 11.4 (2)°. The NC2 unit of the diethylamino group is planar with an angle sum close to 360°. Intermolecular Car—H...Ocarbonyl i

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Ariel, Dio Giovanni, Sri Winarsih, Fitria Febriliani Putri, et al. "Optimation of Combination of N-Hexane Solution and Ethyle Acetate on Secondary Metabolite Compounds Profile of Streptomyces hygroscopicus." Jurnal Kedokteran Brawijaya 31, no. 3 (2021): 186. http://dx.doi.org/10.21776/ub.jkb.2021.031.03.11.

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<p>Streptomyces hygroscopicus (S.hygroscopicus) is a Gram-positive soil bacterium that can produce secondary metabolites from fermentation that have a therapeutic effect. The fermented S. hygrocospicus metabolites that are still in the form of crude extracts are difficult to develop as drug preparations because the active compounds are not yet known, so it will be challenging to determine the dosage of drugs that have a therapeutic effect. Therefore, it is necessary to carry out exploratory research to narrow down the secondary metabolite profile from the fermentation of S. hygroscopicus

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Hartati, Sri, Masrukhan Masrukhan, and Herry Cahyana. "ISOLASI SENYAWA ANTIOKSIDAN DALAM EKSTRAK HEKSANA KULIT BATANG MANGGIS HUTAN (Garcinia bancana Miq.)." Jurnal Kimia Terapan Indonesia 16, no. 1 (2014): 17–23. http://dx.doi.org/10.14203/jkti.v16i1.4.

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Antioksidan adalah suatu senyawa yang dapat menangkap radikal bebas. Salah satu sumber anti oksidan alami adalah dari tumbuh-tumbuhan. Dalam usaha pencarian antioksidan baru, telah dilakukan identifikasi senyawa antioksidan dari ekstrak n-heksana kulit batang Garcinia bancana Miq dengan metode 1,1-difenil-2-pikrilhidrazil (DPPH). Metode isolasi dilakukan dengan cara kombinasi kromatografi (Kromatografi kolom vacum, kromatografi kolom gravitasi, kromatografi lapis tipis sentrifugal dan kromatografi lempeng tipis) Penentuan struktur molekul berdasarkan analisis data spektroskopi UV-VIS, IR, LC-M

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