ChemInform Abstract: Synthesis of L-Cysteic Acid by Indirect Electrooxidation and an Example of Paired Synthesis: L-Cysteic Acid and L-Cysteine from L-Cystine.

ChemInform ◽  
2010 ◽  
Vol 22 (21) ◽  
pp. no-no
Author(s):  
G. SANCHEZ-CANO ◽  
V. MONTIEL ◽  
A. ALDAZ
Keyword(s):  
Cysteic Acid ◽  
Indirect Electrooxidation

scholarly journals Tannin-Mordant Coloration with Matcha (camelia sinensis) and Iron(II)-Lactate on Human Hair Tresses

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 829
Author(s):  
Lusine Sargsyan ◽  
Thomas Hippe ◽  
Hartmut Manneck ◽  
Volkmar Vill
Keyword(s):  
Human Hair ◽  
Cysteic Acid ◽  
Damage Potential ◽  
Natural Hair ◽  
Wash Fastness ◽  
Dyeing Method ◽  
Mordant Dyeing ◽  
Concentration Limits

The aim of this work was to optimize our natural hair dyeing system which we described in our previous work and to compare with other dyeing systems. Therefore, we investigated concentration limits of matcha and mordant and compared this new dyeing method with commercial permanent systems on the market. Completely unpigmented hair tresses were dyed with matcha powder (camelia sinensis) and iron(II)-lactate. To investigate the wash fastness and concentration limits, the differently dyed hair tresses were spectrophotometrically measured. The comparison of the damage potential for which cysteic acid is an indicator was measured by NIR. The concentration of matcha and mordant are responsible for the intensity of the color results. The higher the matcha or the mordant concentration, the darker the color results of the dyed hair tresses. Hair damage of matcha mordant dyeing is comparable with results of commercial permanent hair coloration systems. Moreover, the results of wash fastness of matcha mordant dyed hair tresses is comparable and even better by tendency to permanent colored hair tresses.

Identification of N-Monoacetylcystine in Uraemic Plasma

1981 ◽  
Vol 60 (3) ◽  
pp. 331-334 ◽  
Author(s):  
F. Gejyo ◽  
G. Ito ◽  
Y. Kinoshita
Keyword(s):  
Plasma Levels ◽  
Gel Filtration ◽  
Normal Subjects ◽  
Exchange Chromatography ◽  
Cysteic Acid ◽  
Homocysteic Acid ◽  
Normal Limits ◽  
Acidic Nature ◽  
Sulphur Amino Acids

1. An unidentified ninhydrin-positive substance of an acidic nature was detected in the plasma of uraemic patients. This substance was isolated from haemodialysate by ion-exchange chromatography and gel filtration, and identified as a sulphur-containing amino acid: N-monoacetylcystine. 2. The quantitative determination of sulphur amino acids in plasma revealed that the plasma levels of cysteic acid, homocysteic acid, taurine, cystine and cystathionine as well as N-monoacetylcystine in uraemic patients were markedly higher than in normal subjects (P < 0.001 for each). However, the plasma levels of methionine in uraemic patients were within normal limits.

scholarly journals Amino acid production in isolated rat liver mitochondria

1973 ◽  
Vol 134 (2) ◽  
pp. 431-436 ◽  
Author(s):  
W. Ferdinand ◽  
W. Bartley ◽  
V. Broomhead
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Lipid Hydroperoxide ◽  
Liver Mitochondria ◽  
Cysteic Acid ◽  
Rat Liver Mitochondria ◽  
Isolated Mitochondria ◽  
Selective Retention

Amino acid analyses of mitochondrial membranes are compared with the amino acid composition of whole mitochondria (Alberti, 1964) and found to be very similar except in the cystine content. The composition of the endogenous amino acids found in freshly prepared mitochondria has been established and shown to differ considerably from the amino acid composition of membranes or whole mitochondria. The amino acids produced during anaerobic incubation of mitochondria at pH7.4, on the other hand, resemble the membrane in composition, supporting the view that neutral proteinase activity is responsible for their appearance. Aerobic incubation produces a similar pattern of amino acids except that amino acids such as proline, serine, asparagine, glutamic acid and glutamine, which can be metabolically utilized under aerobic conditions, are present to a smaller extent. The presence of large relative concentrations of endogenous taurine, cysteic acid and oxidized glutathione and the accumulation of taurine during incubation is found. The selective retention of taurine and cysteic acid within the mitochondria is established. It is proposed that the first step in the degeneration of isolated mitochondria results from lipid hydroperoxide accumulation caused by the lack of glutathione reductase in isolated mitochondria.

scholarly journals Determination of cysteic acid in animal tissues by gas chromatography.

1986 ◽  
Vol 35 (4) ◽  
pp. 389-393
Author(s):  
Hiroyuki KATAOKA ◽  
Kazuyuki OHISHI ◽  
Noriko INOUE ◽  
Masami MAKITA
Keyword(s):  
Gas Chromatography ◽  
Cysteic Acid ◽  
Animal Tissues

A Fundamental Study of Quantitative Desulfurization of Sulfur Containing Amino Acids by Raney Nickel and its Character

1981 ◽  
Vol 36 (3) ◽  
pp. 370-374 ◽  
Author(s):  
Shinji Ohmori ◽  
Kazuko Takahashi ◽  
Mikiko Ikeda ◽  
Toshihiko Ubuka
Keyword(s):  
Amino Acids ◽  
Raney Nickel ◽  
Hydrogen Gas ◽  
Cysteic Acid ◽  
Sulfinic Acid ◽  
Fundamental Study ◽  
Homocysteic Acid ◽  
Ni Alloy ◽  
Ph Range ◽  
Sulfur Containing

Abstract The desulfurization of several naturally occurring sulfur-containing amino acids by Raney nickel was studied under various conditions. Raney nickel, which was prepared by treating Al-Ni alloy with 5 N NaOH at 60 °C for 30 min, and was not washed with water, was most active and desulfurized, in quantitative yield, methionine, homocysteine, homocystine, homocysteine sulfinic acid, S-(2-carboxy-n-propyl)-L-cysteine, cysteine, cystine, cysteine sulfinic acid and S-methylcysteine sulfoxide. Raney nickel prepared from 100 mg of Al-Ni alloy desulfurized quantitatively up to 40 μmol methionine at 60 °C for 30 min. The desulfurization occurred effectively in the pH range of 7 and 13, but not below 7. Methionine sulfone, cysteic acid, and homocysteic acid were not subject to the reaction. The Raney nickel was deactivated by H2S, and H2O2, or combustion. Desulfurization activity was not enhanced by hydrogen gas.

Decomposition of Cysteic Acid and Taurine by Soil Micro-organisms

1970 ◽  
Vol 64 (1) ◽  
pp. 77-84 ◽  
Author(s):  
E. O. STAPLEY ◽  
R. L. STARKEY
Keyword(s):  
Cysteic Acid ◽  
Micro Organisms
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