scholarly journals The Fractionation of the Nitrogen Compounds of Wheat Flour on Sephadex Collumns

1968 ◽  
Vol 21 (5) ◽  
pp. 1077 ◽  
Author(s):  
HPC Galluse ◽  
AC Jennings
Keyword(s):  
Molecular Weight ◽  
Acetic Acid ◽  
Wheat Flour ◽  
Trichloroacetic Acid ◽  
Acid Water ◽  
Nitrogen Compounds ◽  
Low Molecular Weight ◽  
Acetic Acid Water

Bagdasarian et al. (1964) have discussed the difficulties in separating compounds of low molecular weight from proteins, and the advantages of using a volatile solvent, such as phenol~acetic acid~water (1 : 1 : 1, w/v/v) (referred to as solvent A in the remainder of this paper), to achieve this separation. Trichloroacetic acid is also efficient in effecting this separation (Bagdasarian et al. 1964), but it dissolves glycoproteins (Bell 1963; Stenzel et al. 1964 ; Jennings and Watt 1967) and some of the wheat flour proteins (Bell 1963) and is difficult to remove from solutions.

Recovering ultraclean lignins of controlled molecular weight from Kraft black-liquor lignins

2015 ◽  
Vol 51 (64) ◽  
pp. 12855-12858 ◽  
Author(s):  
A. S. Klett ◽  
P. V. Chappell ◽  
M. C. Thies
Keyword(s):  
Molecular Weight ◽  
Acetic Acid ◽  
Black Liquor ◽  
Acid Water ◽  
Liquid Equilibrium ◽  
Kraft Black Liquor ◽  
Acetic Acid Water

By operating in a region of liquid–liquid equilibrium, hot acetic acid–water mixtures can be used to simultaneously clean, fractionate, and solvate Kraft black-liquor lignins.

scholarly journals Vapor-liquid Equilibrium in the Ternary Systems Acetic Acid + Water + (Xylose or Glucose)

2021 ◽  
Author(s):  
Nadia Galeotti ◽  
Jakob Burger ◽  
Hans Hasse
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Acetic Acid ◽  
Ternary Systems ◽  
Low Molecular Weight ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Acetic Acid Water ◽  
Vapor Liquid

Hydrolysates of lignocellulosic biomass are aqueous solutions containing, among others, sugars andacetic acid. They are concentrated by evaporation. Only little is known on the influence of the sugars onthe volatility of the low-molecular-weight components in those mixtures. Therefore, in the present workthe isobaric vapor-liquid equilibrium of the systems (acetic acid (AA) þ water (W) þ xylose (X)) and(acetic acid (AA) þ water (W) þ glucose (G)) was studied at 20.0 kPa in a thin film evaporator. The resultsshow that the volatility of acetic acid is increased by the sugars and that xylose and glucose have asimilar influence. The vapor-liquid equilibrium data were correlated using the NRTL model for describingthe liquid phase non-ideality and taking the dimerization of acetic acid in the vapor phase into account.

Simultaneous identification of low-molecular weight phenolic and nitrogen compounds in craft beers by HPLC-ESI-MS/MS

2019 ◽  
Vol 286 ◽  
pp. 113-122 ◽  
Author(s):  
Kamila P. Cheiran ◽  
Victória P. Raimundo ◽  
Vitor Manfroi ◽  
Michel J. Anzanello ◽  
Alessandro Kahmann ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Nitrogen Compounds ◽  
Low Molecular Weight ◽  
Esi Ms ◽  
Simultaneous Identification ◽  
Craft Beers

Liquid Structure of Acetic Acid−Water and Trifluoroacetic Acid−Water Mixtures Studied by Large-Angle X-ray Scattering and NMR

2007 ◽  
Vol 111 (31) ◽  
pp. 9270-9280 ◽  
Author(s):  
Toshiyuki Takamuku ◽  
Yasuhiro Kyoshoin ◽  
Hiroshi Noguchi ◽  
Shoji Kusano ◽  
Toshio Yamaguchi
Keyword(s):  
Acetic Acid ◽  
Trifluoroacetic Acid ◽  
Large Angle ◽  
Liquid Structure ◽  
Acid Water ◽  
X Ray ◽  
X Ray Scattering ◽  
Acetic Acid Water ◽  
Ray Scattering

Acetic acid/water separation by pervaporation with silica filled PDMS membrane

2011 ◽  
Vol 51 (5) ◽  
pp. 819-825 ◽  
Author(s):  
Housheng Hong ◽  
Longxiang Chen ◽  
Qingwen Zhang ◽  
Zheran Zhang
Keyword(s):  
Acetic Acid ◽  
Acid Water ◽  
Pdms Membrane ◽  
Water Separation ◽  
Acetic Acid Water

Diagonal Chromatography for the Selective Purification of Tyrosyl Peptides

1974 ◽  
Vol 52 (11) ◽  
pp. 1013-1017 ◽  
Author(s):  
William H. Cruickshank ◽  
Barry L. Malchy ◽  
Harvey Kaplan
Keyword(s):  
Acetic Acid ◽  
Stationary Phase ◽  
Enzymatic Digestion ◽  
Acid Water ◽  
Chromatographic Purification ◽  
Amino Groups ◽  
Chromatographic System ◽  
Original Direction ◽  
Acetic Acid Water ◽  
Citraconic Anhydride

Thiolysis of an O-dinitrophenyl-tyrosyl peptide results in an increased solubility in the stationary phase of a n-butanol – acetic acid – water – pyridine (15:3:12:10) (BAWP) paper chromatographic system. It is shown that this property can be used to form the basis of a diagonal paper chromatographic purification of tyrosyl peptides from enzymatic digests of proteins. The amino groups of the protein are first reacted with citraconic anhydride and then the citraconyl protein is reacted with 1-fluoro-2,4-dinitrobenzene. The dinitrophenyl-citraconyl protein is subjected to enzymatic digestion, applied to a strip of Whatman 3 MM paper, thiolyzed with 5% 2-mercaptoethanol in acetone, and subjected to chromatography using BAWP as solvent. A guide strip is removed, thiolyzed with 5% 2-mercaptoethanol in 25% pyridine, and resubjected to chromatography in BAWP at right angles to the original direction of chromatography. The tyrosyl peptides are displaced off the diagonal towards the origin. The off-diagonal peptides are isolated from the original chromatogram by thiolysis and chromatography using the diagonal chromatogram to locate the positions of the dinitrophenyl-tyrosyl peptides.

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