COLUMN CHROMATOGRAPHY
Minor Whey Protein Purification Using Ion-Exchange Column Chromatography
... membrane chromatography (MC) [19,20]. The key advantage of MC over column chromatography have been mainly attributed to shorter diffusion times, as the association between target proteins and ...
147
EVALUATION OF THE ANTI TUMOUR AGENTS IN ANNONA MURICATA (LINN ) LEAVES USING COLUMN CHROMATOGRAPHY AND GAS CHROMATOGRAPHY MASS SPECTROMETRY
... The leaves were dried in the laboratory at room temperature (25-30 ₀ c) and pulverized to powder in a mechanical grinder. 100g of plant sample was weighed, transferred to flask, treated with 500ml of absolute ethanol, ...
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Removal Studies of Fluoride Ions by Column Chromatography Using Scolecite
... All solid materials have certain adsorption capacities. Naturally occurring zeolite scolecite have Ca(II) cation which can catch fluoride anions from water. Another cause of capture of fluoride might be the presence of ...
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THE PHOSPHATIDES OF HUMAN PLASMA I NORMAL VALUES DETERMINED BY PAPER AND COLUMN CHROMATOGRAPHY
... The recovery of phosphatides from the paper chromatogram was shown by two means to be quantitative: 1 complete recovery of phosphorus was obtained by eluting samples of lipid placed on s[r] ...
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Partition Column Chromatography for Quantitating Effects of Fertilization on Plant Acids
... Table I shows that K fertilization increased malic acid, citric acid, and total organic acids in both Nordan and Fairway.. At the same K level of fer- tilization, the concentration of to[r] ...
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Carapanosins D—F from the seeds of andiroba ( Carapa guianensis , Meliaceae) and their effects on LPS-activated NO production
... eV). Column chromatography was carried out over silica gel (70-230 mesh, Merck) and MPLC was carried out with silica gel (230-400 mesh, ...from column chromatography were monitored by TLC ...
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Synthesis of Halogenated 1H-Cyclohepta[2,1-b:3,4-b’]diindoles and Their Nucleophilic Aromatic Substitution Reactions
... A mixture of 8 (20 mg, 0,059 mmol), dimethylamine hydrochloride (11 mg, 0.12 mmol) and triethylamine (24 mg, 0.24 mmol) in 2 ml of dry DMF was heated to 100°C for 2 h under nitrogen atmosphere. After being cooled to room ...
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Design New Pyrano Quinoline Derivatives and Study of their Anti-Microbial Activity
... standard. Coupling constants (J) are quoted to the nearest 0.1 Hz and chemical shift (δ-scale) are quoted in parts per million (ppm) using abbreviations s=singlet, d=doublet, t=triplet, q= quartet, m= multiplet, br ...
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← Return to Article Details ISOLATION STUDIES FROM STEM EXTRACT OF PISTACIA INTEGERRIMA STEW. EX BRAND
... Group F was further selected for analysis using column chromatography on silica gel. Elutions (25ml) starting from n-hexane ( 200ml), hexane-chloroform; 8:2 (200ml), hexane-chloroform; 7:3(200ml), ...
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ISOLATION AND IDENTIFICATION OF SOME COMPOUNDS FROM MOLLUSCICIDALY ACTIVE PLANT YUCCA FILAMENTOSA MARGINATA
... gel column chromatography and thin layer chromatography and could be identified using spectroscopic analysis (IR, 1 HNMR, 13 CNMR and chemical ionization mass spectrum) to be compound (1) was ...
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Synthesis of deuterium labelled chloroquine, hydroxychloroquine and their metabolites
... To a solution of (5) (11g, 26.92 mmol) in methanol (100 mL) was added ethylamine solution (70%, 110 mL) under ice/water bath. The solution was stirred for 8 h at room temperature. TLC showed little starting material ...
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Synthesis of aryl α,α difluoroethyl thioethers a novel structure motif in organic chemistry, and extending to aryl α,α difluoro oxyethers
... (2-Bromophenyl)(ethynyl)sulfane 1f: According to the procedure described for 1b, TMS-EBX (1.89 g, 5.50 mmol) was added to a solution of TBD (0.697 g, 5.00 mmol), and 2-bromobenzenethiol (0.978 g, 5.17 mmol) THF (60 mL). ...
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New interlocked molecular machines.
... product was concentrated and the residue purified by column chromatography on silica gel using 20% hexanes in chloroform as the eluent. Yields were moderate ranging from -35% to 87%. The isolated ...
306
THE RELATIVE RATES OF SYNTHESIS OF HEMOGLOBINS A AND F IN IMMATURE RED CELLS OF NEWBORN INFANTS
... Fetal hemoglobin as a percentage of the total hemoglobin in the cord blood samples separated by column chromatography, in relation to gestational age. The[r] ...
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Sequential MCR via Staudinger/aza-Wittig versus cycloaddition reaction to access diversely functionalized 1-amino-1 H-imidazole-2(3H )-thiones
... of solvent followed by extraction, the corresponding α-(imidazol-2-ylthio) carbonyl compounds 7a-c were obtained as solid after column chromatography purification (84-93%) (Scheme 6). The subsequent ...
14
Synthesis and Quantitative Structure–Activity Relationship of Imidazotetrazine Prodrugs with Activity Independent of O6 Methylguanine DNA methyltransferase, DNA Mismatch Repair and p53
... The product was purified by flash column chromatography 5% AcOH/CH3CN and imidazotetrazine 3a was obtained as a yellow solid 0.38 g, 60%: m.p.. The product was purified by flash column c[r] ...
46
MOLLUSCICIDALACTIVITY OF SOME CONSTITUENTS ISOLATED FROM CESTRUM PURPUREUM
... Purified compounds of Cestrum purpureum (family: Solanaceae), were used as plant molluscicides against the vector snails Biomphalaria alexandrina. Phytochemical screening tests aiming at identification of the different ...
14
Purification and Characterization of a 43 Kilodalton Extracellular Serine Proteinase from Cryptococcus neoformans
... Cryptococcus neoformans is an opportunistic yeast pathogen that causes life-threatening meningoencephalitis in 6 to 8% of patients with AIDS (6). Little is known about the proteins it secretes or releases, despite ...
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Phytochemical and Pharmacological Evaluation of Pedalium Murex Linn Leaves
... Leaves 46 4 DPPH Radical Scavenging Activity of Pedalium murex Linn Leaves 47 5 Thin Layer Chromatography of EEPM 47 6 Column Chromatography of EEPM 48 7 Thin Layer Chromatography of EEP[r] ...
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Extraction of Poly Phenols from Cladium Mariscus Seeds and studying its Antifungal Activity with Isolation and Identification of one Compound of Flavone Glycosides
... by Column Chromatography, over Si-gel column and eluted with ethyl acetate : hexane, after isolation one compound, which identification by LS Mass/ Mass, proton nuclear magnetic resonance analysis ( ...
6