scholarly journals Removal of Acid Beverage Flocs in Crystal Sugar by Adsorption Column Chromatography: Preliminary Study with Adsorbent Resin

2015 ◽  
Vol 1 (1) ◽  
pp. 1-3
Author(s):  
Roberta Bergamin Lima ◽  
Claudio Lima de Aguiar
Keyword(s):  
Column Chromatography ◽  
Adsorbent Resin ◽  
Adsorption Column ◽  
Preliminary Study

Comparison of Some Cleanup Columns for Residue Analysis of Chlorinated and Phosphorus-Containing Pesticides

1971 ◽  
Vol 54 (1) ◽  
pp. 147-149
Author(s):  
B Versino ◽  
M-TH van der Venne ◽  
H Vissers
Keyword(s):  
Column Chromatography ◽  
Residue Analysis ◽  
Chlorinated Pesticides ◽  
Adsorption Column ◽  
Phosphorus Containing ◽  
Better Than

Abstract A comparison is presented of 8 of the most widely used cleanup methods based on adsorption column chromatography for chlorinated and phosphorus-containing compounds and their metabolites. For chlorinated pesticides, all methods show equivalent efficiency and recovery. For phosphorus-containing compounds and metabolites, methods employing columns filled with adsorbent mixtures work better than “all-Florisii” columns.

Preparative Purification of Epigallocatechin-3-gallate (EGCG) from Tea Polyphenols by Adsorption Column Chromatography

2014 ◽  
Vol 77 (23-24) ◽  
pp. 1643-1652 ◽  
Author(s):  
Weitao Wang ◽  
Chaoyang Ma ◽  
Shangwei Chen ◽  
Song Zhu ◽  
Zaixiang Lou ◽  
...  
Keyword(s):  
Column Chromatography ◽  
Tea Polyphenols ◽  
Adsorption Column

Extraction and Purification of Polyphenolic Compounds Obtained from Hsian-Tsao (Mesona Procumbens Hemsl.)

2012 ◽  
Vol 550-553 ◽  
pp. 1790-1795 ◽  
Author(s):  
Zhi Xian Huang ◽  
Ting Qiu ◽  
Xiao Cui Lin ◽  
Yan Xiang Wu
Keyword(s):  
Lipid Peroxidation ◽  
Column Chromatography ◽  
Polyphenolic Compounds ◽  
Maximum Amount ◽  
Flavonol Glycoside ◽  
Acetone Extract ◽  
Adsorption Column ◽  
Extraction And Purification ◽  
Polyphenolic Content ◽  
First Time

Extraction and purification of polyphenolic compounds from Hsian-tsao (Mesona procumbens Hemsl.) were investigated. The polyphenolic compounds were extracted by using acetone, ethanol or methanol at three different concentrations. The polyphenolic concentration and the inhibition of lipid peroxidation were determined. The results showed that, among solvents tested, 75% acetone solvent extracted a maximum amount of polyphenolic compounds from Hsian-tsao. The 75% acetone extract was purified further by AB-8 adsorption column chromatography and eight fractions, A~H, were obtained. Among eight fractions, Fraction E had the highest polyphenolic content and inhibition(76%). Moreover, Fraction E was separated into four polyphenolic compounds (1~4) by HPLC and each compound reached a purity of more than 98%. The structure of the compound was identified by LC-MS and NMR, and the compound-4 was determined to be astragalin (a flavonol glycoside) which was obtained from HT for the first time.

Preparation of Supported Nano-gold Catalyst by Adsorption Column Chromatography

2011 ◽  
Vol 32 (2) ◽  
pp. 374-378
Author(s):  
Xinlei ZHAI ◽  
Jinguang XU ◽  
Xiufeng XU ◽  
Xuhua ZOU ◽  
Shixue QI ◽  
...  
Keyword(s):  
Column Chromatography ◽  
Gold Catalyst ◽  
Adsorption Column ◽  
Nano Gold

Allomones confer resistance to Musa cultivar Pisanglilin against infestation by Odoiporus longicollis [Oliver] and characterization of Allomones

2021 ◽  
Vol 53 (1) ◽  
pp. 35-52
Author(s):  
K.J Kavitha ◽  
L. Sibina L ◽  
D.A. Evans
Keyword(s):  
Larvicidal Activity ◽  
Column Chromatography ◽  
Simultaneous Action ◽  
Sulfoquinovosyl Diacylglycerol ◽  
Leucine Amino Peptidase ◽  
Total Free Amino Acids ◽  
Preliminary Study ◽  
Cuticle Development ◽  
Moulting Hormone

In bioassay guided extraction of pseudostem powder of Pisanglilin by organic solvents we found the larvicidal activity in acetone extract, whose column chromatography by methanol-chloroform mixture separated the extract into 9-fractions, of which the 8th fraction showed larvicidal activity. Subfractionation of the active fraction by column chromatography resulted in the isolation of two larvicidal molecules [Stigmasterol-3-O-glucoside (SOG) and Sulfoquinovosyl diacylglycerol (SQDG)]. Yield of SOG was 0.002 % and SQDG was 0.005 % and both were highly toxic to O. longicollis larvae with LD50 of 0.40 and 0.378 ppm, respectively. Larvae fed these compounds stopped feeding on third day and died within one week. SOG inhibited the amylase and protease activity of gut and induced histolysis in the mid gut. While SQDG inhibited the leucine amino peptidase and trypsin like serine protease activities, which decreased the content of total free amino acids. Imbalance in the activities of aspartate amino transferase and alanine amino transferase disrupted the aminoacid metabolism and the compound inhibited the activity of tyrosinase (an enzyme involved in cuticle development). SQDG toxicity caused accumulation of 20-hydroxyecdysone, the active moulting hormone in the hemolymph. Simultaneous action of two allomones present in Pisanglilin effectively resisted the attack of endophytic larvae in the pseudostem and thereby conferred resistance against infestation by O.longicollis. Preliminary study by intrapseudostem injection of Pisanglilin extract in susceptible M.paradisiaca cultivar Kappa, gave complete protection to it from attack by this pest, under field condition.

A Sweep Co-distillation Cleanup Method for Organophosphate Pesticides.

1965 ◽  
Vol 48 (6) ◽  
pp. 1154-1158
Author(s):  
R W Storherr ◽  
R R Watts
Keyword(s):  
Column Chromatography ◽  
Pesticide Residues ◽  
Methyl Parathion ◽  
Organophosphate Pesticides ◽  
Organophosphate Pesticide ◽  
Distillation Method ◽  
Adsorption Column ◽  
Column Method ◽  
Better Than

Abstract A simple sweep co-distillation method which uses the Storherr tube was developed for cleanup of 2 g or less of crude crop extracts which contain organophosphate pesticide residues. Five crops (kale, carrots, apples, strawberries, and potatoes) were fortified at levels of 1.0, 0.5, and 0.1 ppm with a mixture containing Trithion, diazinon, malathion, methyl parathion, and parathion. The sweep co-distillation method was compared with the adsorption column method by use of this mixture. The range of average per cent recoveries were 89–101% and 83–96%, respectively. The cleanup required approximately 20 minutes per sample and was as good as, and in many cases better than, adsorption column chromatography. Detection of the organophosphate pesticides was performed by GLC with the thermionic detector.

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