Preparation of bisulphite addition compounds of 5-Amino-5-deoxy-D-xylose

1966 ◽  
Vol 19 (4) ◽  
pp. 667 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Amino Acid ◽  
Free Amino ◽  
Amino Sugar ◽  
Barium Hydroxide ◽  
Free Sugar ◽  
Amino Sugars ◽  
Addition Compound ◽  
Derivatives Of

Sulphurous acid alone and in admixture with other stronger acids has been used to hydrolyse 5-amino, 5-N-cyclohexylamino, and 5-N-piperidino derivatives of 5-deoxy-l,2-O-isopropylidene-D-xylose. The bisulphite addition compounds of the corresponding amino sugars were thus isolated. Similarly, methyl 5-amino-5-deoxy- 2,3-O-isopropylidene-D-riboside was hydrolysed to yield the bisulphite addition compound of 5-amino-5-deoxy-D-ribose. Treatment of the bisulphite addition compound of 5-amino-5-deoxy-D-xylose with barium hydroxide gave the free amino sugar as a syrup in 96% yield. Removal of bisulphite from the addition compound of 5-X-cyclohexylamino-5-deoxy-D-xylose gave the free sugar in 30% yield together with an amino acid (XVI).

THE SYNTHESIS OF D,L-ALANINE AND D,L-PHENYLALANINE BY WAY OF THE CORRESPONDING HYDANTOINS

1948 ◽  
Vol 26b (12) ◽  
pp. 773-776 ◽  
Author(s):  
Roger Gaudry
Keyword(s):  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Ammonium Carbonate ◽  
Barium Hydroxide ◽  
Addition Compound

D,L-Alanine was prepared in an 80% over-all yield by heating lactonitrile with ammonium carbonate to give 5-methylhydantoin, and hydrolyzing the latter with barium hydroxide into the free amino acid. D,L-Phenylalanine was likewise prepared from phenylacetaldehyde, by way of the bisulphite addition compound and 5-benzylhydantoin, followed by hydrolysis. A 40% over-all yield of the amino acid was obtained.

DISTRIBUTION OF NITROGEN IN THE BLACK SOLONETZIC AND BLACK CHERNOZEMIC SOILS OF ALBERTA

1971 ◽  
Vol 51 (2) ◽  
pp. 185-193 ◽  
Author(s):  
S. U. KHAN ◽  
F. J. SOWDEN
Keyword(s):  
Amino Acid ◽  
Humic Acid ◽  
Free Amino ◽  
Water Extract ◽  
Amino Sugar ◽  
Chernozem Soil ◽  
Amino Acid Distribution ◽  
Total N ◽  
Ammonium N ◽  
Hydrolysis Of

More N was brought into solution by hydrolysis with 6 N HCl from the Ah horizons of a Black Solonetz and a Black Solod than from the Ah horizon of a Black Chernozem soil of Alberta. The percentages of total N represented by the ammonium-N, amino acid-N and amino sugar-N were similar for the three soils. The proportion of soil-N present as amino acid-N and amino sugar-N decreased and that of ammonium-N increased with depth in all three profiles. The acid hydrolysis of the water-extract obtained from Ah horizon of the Black Solonetz released more (ammonium + amino acid + amino sugar)-N than did that of the Ah horizons of the other two soils. The humic acid fractions obtained from Ah horizons contained more total N than did the humic acids extracted from the B horizons of the three soils. While the proportions of N accounted for as (ammonium + amino acid + amino sugar)-N in the humic acid fractions from Ah horizons of the soils were similar, they increased in the order Chernozem > Solod > Solonetz for the B horizons. In general, there were few noteworthy differences in the amino acid distribution between the three soils or between the various horizons of the same soil. The hydrolyzates of the water-extracts of Ah horizons showed higher values for the molar distribution of threonine, serine, glycine and alanine, and lower values for aspartic acid and glutamic acid than did the corresponding hydrolyzates of the soils; the amounts of free amino acids in these extracts were very small. There was little difference in the amino acid composition of the humic acid fractions obtained from the three soils or from the different horizons of the same soil; it was, in general, similar to that of the soils. The data indicate that differences in the salt regime in the Solonetzic, Solodic and Chernozemic soils do not result in the different kinds of nitrogenous organic matter.

Analysis of Free Sugar, Organic Acid and Free Amino Acid in Commercial Makjang

2015 ◽  
Vol 25 (2) ◽  
pp. 326
Author(s):  
So Hean Jeon ◽  
Hye Lyun Jeon ◽  
Hyun-Jeong Kim ◽  
Su-Jin Lee ◽  
Bo-Dam Lee ◽  
...  
Keyword(s):  
Amino Acid ◽  
Organic Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Free Sugar

Cupric Ion Chelation Assisted Synthesis of N(α)-Protected N(ω)-Acridin-9-yl α,ω-Diamino Carboxylic Acids

1993 ◽  
Vol 46 (8) ◽  
pp. 1207 ◽  
Author(s):  
FCK Chiu ◽  
RTC Brownlee ◽  
DR Phillips
Keyword(s):  
Amino Acid ◽  
Free Amino Acid ◽  
Carboxylic Acids ◽  
Free Amino ◽  
Side Chain ◽  
Direct Introduction ◽  
Cupric Ion ◽  
Derivatives Of

The synthesis of Nα-protected Nω-acridin-9-yl derivatives of the α,w-diamino carboxylic acids ornithine and lysine is reported. Direct introduction of the acridin-9-yl moiety to the amino side chain of the free amino acid was achieved in methanol through temporary copper(II) chelation protection of the α-amino and carboxy groups. Nα-Fmoc protection was introduced by using N-(fluoren-9-ylmethoxycarbonyloxy)succinimide in aqueous dioxan.

Evaluation of Free Amino Acid and Free Sugar Contents in Five Lines of Virginia-Type Peanuts at Four Locations1

1980 ◽  
Vol 7 (1) ◽  
pp. 55-60 ◽  
Author(s):  
Chintana Oupadissakoon ◽  
Clyde T. Young ◽  
R. Walton Mozingo
Keyword(s):  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Block Design ◽  
Calcium Content ◽  
Free Sugar ◽  
Yield Data ◽  
Free Sugars ◽  
Breeding Lines ◽  
Index Value

Abstract Five lines of Virginia-type peanuts, Florigiant (FG), NC 6, NC 17921 (FG × Florunner), NC 17922 (FG × Valencia), NC 17976 (FG × Spanhoma), were selected from the advanced breeding lines and the standard variety test. They were grown at 4 county locations, 2 in North Carolina and 2 in Virginia, with 3 replications (blocks) in a randomized complete block design; adjacent plots were used for each digging. Free amino acid and free sugars were determined on sound mature kernels. Statistical analysis showed significant differences for varieties and locations. The variety effects were larger in the case of the free sugar contents. NC 6 had the largest quantity of glucose (0.12 mg/g), sucrose (37.45 mg/g), and stachyose (4.24 mg/g), while FG was highest in inositol (0.15 mg/g). In the case of free amino acids (μmoles/g), significant variety effects were observed for threonine-serine (1.55–1.92), alanine (0.95–1.53), peptide-cystine (1.28–1.50), valine (0.42–0.62), and histidine (0.58–0.66). Peanuts grown at Northampton County (NC) had the highest quantities of inositol (0.16 mg/g), sucrose (32.39 mg/g), stachyose (4.63 mg/g), aspartic acid (1.48 μmoles/g), threonine-serine (2.55), glutamic acid (7.49), alanine (1.89), valine (0.76), isoleucine (0.23) unknown 4-tyrosine (0.37), and histidine (0.78). The arginine maturity index value, calcium content, % sound mature kernels, % extra large kernels, and yield data are discussed.

scholarly journals Dissociation of fibronectin from gelatin-agarose by amino compounds

1978 ◽  
Vol 175 (1) ◽  
pp. 333-336 ◽  
Author(s):  
M Vuento ◽  
A Vaheri
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Human Plasma ◽  
Gel Filtration ◽  
Basic Amino Acid ◽  
Amino Sugars ◽  
Neutral Ph ◽  
Acidic Amino Acids ◽  
Amino Compounds ◽  
Derivatives Of

Soluble fibronectin of human plasma was specifically dissociated at neutral pH from gelatin-agarose by several cationic amino compounds, notably the polyamines spermine, spermidine and putrescine, the basic amino acid arginine, and amino sugars. The neutral and acidic amino acids and the N-acetylated derivatives of amino sugars tested were ineffective. Gel-filtration experiments demonstrated that [14C]spermidine bound to fibronectin but not to gelatin.

scholarly journals Analysis of Free Sugar and Free Amino Acid from Gochujang Produced from Korean Small Farms

2013 ◽  
Vol 29 (5) ◽  
pp. 543-552 ◽  
Author(s):  
Seong-Hye Son ◽  
Yeo-Joo Hong ◽  
Gwi-Jung Han ◽  
Sun-Mi Yu ◽  
Seung-Seok Yoo
Keyword(s):  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Free Sugar ◽  
Small Farms

Phosphorylation, glycosylation and amino acid sequence of component PP3 from the proteose peptone fraction of bovine milk

1993 ◽  
Vol 60 (4) ◽  
pp. 535-542 ◽  
Author(s):  
Esben S. Sørensen ◽  
Torben E. Petersen
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Molecular Mass ◽  
Primary Structure ◽  
Bovine Milk ◽  
Amino Sugar ◽  
Amino Sugars ◽  
Amino Acid Residues ◽  
Proteose Peptone ◽  
Amino Acid Analyser

SummaryComponent PP3 is a phosphorylated glycoprotein with an apparent molecular mass of 28 kDa isolated from the proteose peptone fraction of bovine milk. The function of the protein is not known. The primary structure has been determined and shown to contain 135 amino acid residues (EMBL accession no. P80195). It was phosphorylated at Ser29, Ser34, Ser38, Ser40 and Ser46. Two O-linked carbohydrate groups were found at Thr16 and Thr86, while one N-linked carbohydrate group was present at Asn77. Thr16 was only ∼ 50% glycosylated. The amino sugar detected by the amino acid analyser at Thr86 was mainly galactosamine but a small amount of glucosamine was also present. The amino sugars found in the carbohydrate group linked to Asn77 were both glucosamine and galactosamine. A fragment of PP3 has been isolated from milk and shown to correspond to residues 54–135. This fragment was probably generated by plasmin hydrolysing the Arg53–Ser54 bond.

COMPOSITION OF EPIPHYSEAL CARTILAGE: V. AMINO ACID AND AMINO SUGAR COMPOSITION OF EPIPHYSEAL CARTILAGE OF RACHITIC CHICKS; CHANGES EFFECTED BY VITAMIN D3

1967 ◽  
Vol 45 (5) ◽  
pp. 729-734 ◽  
Author(s):  
J. D. Cipera
Keyword(s):  
Amino Acids ◽  
Vitamin D ◽  
Amino Acid ◽  
Oral Administration ◽  
Vitamin D3 ◽  
Amino Sugar ◽  
Epiphyseal Cartilage ◽  
Amino Sugars ◽  
Sugar Composition

Nineteen amino acids and two amino sugars were identified in the epiphyseal cartilage of rachitic chicks, and their levels estimated. Investigation of the effect of oral administration of vitamin D3 on the levels of these amino acids and amino sugars showed that vitamin D3 increased significantly the levels of galactosamine and decreased the levels of hydroxyproline and of glycine. The decrease in the levels of proline and cystine and increase in that of methionine were not statistically significant.

scholarly journals Effect of Location and Time of Harvest on Free Amino Acid and Free Sugar Contents of Florigiant Peanuts1

1980 ◽  
Vol 7 (2) ◽  
pp. 61-67 ◽  
Author(s):  
Chintana Oupadissakoon ◽  
Clyde T. Young ◽  
Francis G. Giesbrecht ◽  
Astor Perry
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino Acids ◽  
Free Amino ◽  
Free Sugar ◽  
Total Sugars ◽  
Harvest Dates ◽  
Flavor Precursors ◽  
The Individual

Abstract Peanuts, Arachis hypogaea L., Florigiant cv., were grown in North Carolina counties, Northampton, Bertie, Chowan, Halifax, Hertford and Nash in order to determine the influence of locations and harvest dates on the individual free amino acids, free sugars, total sugars, arginine maturity index, and calcium. The peanuts were harvested at weekly intervals up to eight times, starting 125–130 days after planting. Location effects were significant for many precursors of typical roasted peanut flavor (aspartic acid, glutamic acid, peptide, and phenylalanine) and sugars (fructose, glucose, and sucrose). Locations did not significantly influence the atypicl roasted flavor precursors (tyrosine, lysine, and arginine). Changes in free amino acid and free sugar contents during the peanut harvesting period gave both linear and quadratic trends. Both free amino acid and sugar contents decreased after the early harvest times, followed by a flattening out near optimum harvesting period, and eventually increased during the late harvests. At optimum harvesting time, roasted flavor precursors were predominant among free amino acids comprising 64% of the total. Sucrose, a source of sugar reactants, constituted 86% of the total sugars.

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