THE PREPARATION AND PROPERTIES OF THE POTASSIUM SKATOLYL SULFATES (THE "SULFATOXYSKATOLES")

1965 ◽  
Vol 43 (4) ◽  
pp. 469-478 ◽  
Author(s):  
R. A. Heacock ◽  
O. Hutzinger
Keyword(s):  
Sulfur Trioxide ◽  
Chlorosulfonic Acid ◽  
Chromatographic Behavior ◽  
Ultraviolet Spectroscopy ◽  
Solvent Systems

The four isomeric potassium skatolyl sulfates, with the sulfate residue attached to the 4-, 5-, 6-, and 7-positions in the benzene moiety of the skatole molecule, have been synthesized. The four isomers were prepared by the sulfation of the corresponding hydroxyskatoles with either (a) the pyridine – sulfur trioxide complex in pyridine or (b) chlorosulfonic acid in pyridine. The ultraviolet spectroscopy of this group of compounds is discussed together with their paper chromatographic behavior in several different solvent systems.

Observations on the Scutellum. III. Ferulic Acid as a Component of the Cell Wall in Wheat and Barley

1979 ◽  
Vol 6 (4) ◽  
pp. 485 ◽  
Author(s):  
MG Smart ◽  
TP O'brien
Keyword(s):  
Cell Wall ◽  
Ferulic Acid ◽  
Cell Walls ◽  
Inert Atmosphere ◽  
Ultraviolet Spectroscopy ◽  
Alkaline Extraction ◽  
Coumaric Acid ◽  
Ether Extract ◽  
Solvent Systems ◽  
Layer Chromatography

Fractions enriched in the cell walls of wheat and barley scutella were prepared from isolated, ungerminated scutella. The cell-wall fractions were subjected to hot, alkaline extraction under an inert atmosphere. An ether extract was investigated for phenolic compounds by thin-layer chromatography using three solvent systems and by ultraviolet spectroscopy. The major autofluorescent component of the scutella of both wheat and barley is ferulic acid. There is apparently no p-coumaric acid.

scholarly journals SULFATION OF ABIES ETHANOL LIGNIN WITH COMPLEXES OF SULFUR TRIOXIDE WITH 1,4-DIOXANE AND PYRIDINE

2020 ◽  
pp. 5-15
Author(s):  
Yuriy Nikolayevich Malyar ◽  
Natal'ya Yur'yevna Vasil'yeva ◽  
Aleksandr Sergeyevich Kazachenko ◽  
Galina Pavlovna Skvortsova ◽  
Irina Vladimirovna Korol'kova ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Sulfur Trioxide ◽  
Chlorosulfonic Acid ◽  
Gel Permeation Chromatography ◽  
Ftir Spectra ◽  
Water Soluble ◽  
Simultaneous Increase ◽  
Absorption Bands ◽  
High Sulfur Content ◽  
Low Degree

In this work, we optimized the process of sulfating abies ethanol lignin with complexes of sulfuric anhydride with pyridine and 1,4-dioxane. Experimentally found are the conditions for the implementation of the process of sulfation of abies ethanol lignin by complexes of sulfur trioxide with 1,4-dioxane and pyridine, providing a high sulfur content (12.0–12.6%). It was shown that a high sulfur content of 12.0–13.5% (mass.) in the obtained ethanol lignin sulfate is achieved when the ratio of the amount of chlorosulfonic acid to the amount of abies ethanol lignin is 20.22 : 1 mmol : g and the duration of the sulfation process is 60–120 min and independent of the nature of the sulfating complex. The structure and composition of water-soluble sulfated abies ethanol lignin are confirmed by FTIR spectroscopy, gel permeation chromatography and elemental analysis. In the FTIR spectra of sulfated abies ethanol lignin, in comparison with the FTIR spectra of the initial abies ethanol lignin, there are absorption bands in the region of 1270–1260, 1220–1212, 861–803 cm-1, corresponding to vibrations of sulfate groups. Compared to the initial lignin, sulfated abies ethanol lignin has a low degree of polydispersity. In particular, there was an increase in Mw c ~1.5 kDa to ~3.4 kDa in lignin sulfated for 30 min and a decrease in polydispersity from 2.59 to 1.22 compared to the initial abies ethanol lignin. With an increase in the sulfation time, the profile of the molecular mass distribution curve shifts to a high molecular weight region, with a simultaneous increase in polydispersity to 1.5 and Mw increases to ~4.3 kDa.

Purification and partial characterization of an antibiotic produced by Myxococcus xanthus

1974 ◽  
Vol 20 (2) ◽  
pp. 155-161 ◽  
Author(s):  
B. Vaks ◽  
A. Zuckerberg ◽  
E. Rosenberg
Keyword(s):  
Mass Spectra ◽  
Protein Hydrolysate ◽  
Antibiotic Production ◽  
Myxococcus Xanthus ◽  
Chromatographic Behavior ◽  
Gram Negative Bacteria ◽  
Apparent Homogeneity ◽  
Silicic Acid Chromatography ◽  
Solvent Systems

A strain of Myxococcus xanthus, referred to as M. xanthus TA, has been isolated which produces an antibiotic capable of inhibiting growth of certain Gram-positive and Gram-negative bacteria. Antibiotic production was significantly inhibited when the concentration of protein hydrolysate in the production medium exceeded 1%. The antibiotic was purified over 1000 times to apparent homogeneity by silicic acid chromatography and by a variety of preparative alumina thin-layer chromatographic procedures. The purified antibiotic was partially characterized by its chromatographic behavior in six solvent systems, stability to acid, alkali and heat, infrared, ultraviolet, and mass spectra. The antibiotic has a λmax of 242 nm in methanol.

Thin Layer Chromatographic Identification of Some Sympathomimetic Amines

1976 ◽  
Vol 59 (6) ◽  
pp. 1416-1418
Author(s):  
Jitendra J Shah ◽  
Ramila J Shah
Keyword(s):  
Organic Solvent ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Solvent System ◽  
Chromatographic Behavior ◽  
Bromocresol Green ◽  
Sympathomimetic Amines ◽  
Solvent Systems ◽  
Glass Plates

Abstract Thin layer chromatographic behavior of some sympathomimetic amines in the presence of acids in neutral and organic solvent systems is reported. The sympathomimetic amines were dissolved in 0.1N HCl or ethanol and treated with bromocresol green or p-nitrobenzoyl chloride reagents on fiber sheets or precoated glass plates. Two-, 3-, and 4-component solvent systems were tested. Benzene-ethyl acetate gave 2 spots for each amine standard; the more polar spots were satisfactorily separated. Amines in pharmaceuticals were not separated by any solvent system tested.

Determination of Sulfur Trioxide in Chlorosulfonic Acid Thermometric Methods

1950 ◽  
Vol 22 (4) ◽  
pp. 549-552 ◽  
Author(s):  
William. Seaman ◽  
J. T. Woods ◽  
H. N. Bank
Keyword(s):  
Sulfur Trioxide ◽  
Chlorosulfonic Acid

scholarly journals THE CHEMISTRY OF THE "AMINOCHROMES": PART I. THE PREPARATION AND PAPER CHROMATOGRAPHY OF PURE ADRENOCHROME

1958 ◽  
Vol 36 (5) ◽  
pp. 853-857 ◽  
Author(s):  
R. A. Heacock ◽  
C. Nerenberg ◽  
A. N. Payza
Keyword(s):  
Heavy Metal Ions ◽  
Silver Oxide ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Acid Hydrazide ◽  
Crystalline Form ◽  
Chromatographic Behavior ◽  
Mixture Prior ◽  
Solvent Systems ◽  
Dowex 1

The preparation of adrenochrome in a pure stable crystalline form has been carried out by the silver oxide oxidation of adrenaline in methanol with the use of an anion-exchange resin (Dowex-1(Cl−)) to remove heavy metal ions from the reaction mixture prior to the isolation of the product. Its paper chromatographic behavior together with that of three derivatives (adrenolutin, adrenochrome monosemicarbazone, and adrenochrome monoisonicotinic acid hydrazide) in six different solvent systems has been examined. Water was found to be the best paper chromatographic solvent so far examined for this series of compounds.

ISOLATION OF CRYSTALLINE 16-EPIESTRIOL FROM HEN URINE

1964 ◽  
Vol 42 (8) ◽  
pp. 1177-1182 ◽  
Author(s):  
F. Hertelendy ◽  
R. H. Common
Keyword(s):  
Crystalline Form ◽  
Chromatographic Behavior ◽  
Melting Points ◽  
Solvent Systems

16-Epiestriol has been isolated in crystalline form from hen urine and characterized on the basis of the melting points of the isolated product and of two of its derivatives (acetonide, triacetate) and on the chromatographic behavior of the isolated product and five of its derivatives in each of three different solvent systems.

Hydrogen-Bonded Solvent Systems

1969 ◽  
Vol 67 (1_3) ◽  
pp. 168-168
Author(s):  
H. G. Hertz
Keyword(s):  
Solvent Systems ◽  
Hydrogen Bonded
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