Hydrochloric acid hydrolysis of bromazepam. Identification and relevance of some additional products

1982 ◽  
Vol 4 (1) ◽  
pp. 12-15 ◽  
Author(s):  
M. M. A. de Bruyne ◽  
A. Sinnema ◽  
A. M. A. Verweij
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Hydrolysis Of

Studies on the lignin of Eucalyptus regnans F. Muell. VII. The acid hydrolysis of ethanyol lignin-A

1953 ◽  
Vol 6 (2) ◽  
pp. 156 ◽  
Author(s):  
JWT Merewether
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Carbonyl Group ◽  
Dilute Hydrochloric Acid ◽  
Hydroxyl Groups ◽  
Eucalyptus Regnans ◽  
Ethoxyl Group ◽  
Hydrolysis Of

Ethanol lignin-A from the ethanolysis of Eucalyptus regnans P. Muell. has been hydrolysed with dilute hydrochloric acid with the object of ascertaining whether the combined ethoxyl is present as an acetal or as ether. Hydrolysis with 12 per cent. hydrochloric acid was found to split off one ethoxyl group, while hydrolysis with 20 per cent. acid brought about complete de-ethylation. The de-ethylated ethanol lignin-A contained one carbonyl group less and two hydroxyl groups more than the original ethanol lignin-A. These results lend no support to the hypothesis that alcohol lignins are acetals, and favour the theory that the combined alkoxyl is probably present as ether.

scholarly journals Hydrolysis of Phosphopeptides. I. Acid Hydrolysis of O-Phosphoryl-DL-serylglycine and Glycyl(O-phosphoryl)-DL-Serine. Sequence Inversion in Dilute Hydrochloric Acid.

1960 ◽  
Vol 14 ◽  
pp. 625-633 ◽  
Author(s):  
Georg Fölsch ◽  
Olof Mellander ◽  
Lars Strid ◽  
Susanne Refn ◽  
Gertrud Westin
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Dilute Hydrochloric Acid ◽  
Sequence Inversion ◽  
Hydrolysis Of

scholarly journals Acid Hydrolysis of Phenylthiohydantoins of Amino Acids

1971 ◽  
Vol 24 (4) ◽  
pp. 1247 ◽  
Author(s):  
AS Inglis ◽  
PW Nicholls ◽  
CM Roxburgh
Keyword(s):  
Amino Acids ◽  
Hydrochloric Acid ◽  
Thin Layer ◽  
Acid Hydrolysis ◽  
Free Amino ◽  
Hydriodic Acid ◽  
Ultraviolet Spectroscopy ◽  
Quantitative Identification ◽  
Layer Chromatography ◽  
Hydrolysis Of

The phenylthiohydantoins (PTHs) derived from amino acids were hydrolysed in boiling hydriodic acid for 24 hr. Good yields of free amino acids were obtained for all PTH derivatives except methionine. In contrast to hydrolysis with hydrochloric acid, hydrolysis with hydriodic acid converts PTH-threonine, PTH-serine, and PTH-tryptophan respectively to oc-amino-n-butyric acid, alanine, and a mixture (approx. 2: 1) of glycine and alanine. This procedure provides a useful adjunct to thin-layer chromatography and ultraviolet spectroscopy for quantitative identification of the PTH derivative.

Chlorine emission and dechlorination in co-firing coal and the residue from hydrochloric acid hydrolysis of Discorea zingiberensis

Fuel ◽  
2006 ◽  
Vol 85 (14-15) ◽  
pp. 2034-2040 ◽  
Author(s):  
Caixiang Zhang ◽  
Yanxin Wang ◽  
Zhihua Yang ◽  
Minghou Xu
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Hydrolysis Of

Prospects for the use of titanium alloys for the production of apparatus for the hydrochloric acid hydrolysis of yeasts

1983 ◽  
Vol 19 (3) ◽  
pp. 249-253
Author(s):  
R. K. Melekhov ◽  
M. V. Koval' ◽  
A. M. Krutsan ◽  
V. E. Blashchuk ◽  
A. V. Zykov
Keyword(s):  
Hydrochloric Acid ◽  
Titanium Alloys ◽  
Acid Hydrolysis ◽  
Hydrolysis Of

A Rapid Vapor-Phase Acid (Hydrochloric Acid and Trifluoroacetic Acid) Hydrolysis of Peptide and Protein

1987 ◽  
Vol 102 (6) ◽  
pp. 1593-1597 ◽  
Author(s):  
Akira TSUGITA ◽  
Toyoaki UCHIDA ◽  
H.Werner MEWES ◽  
Tatsuaki ATAKA
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Vapor Phase ◽  
Trifluoroacetic Acid ◽  
Hydrolysis Of

Acid Hydrolysis of Chitosan to Oligomers Using Hydrochloric Acid

2019 ◽  
Vol 42 (9) ◽  
pp. 1741-1746 ◽  
Author(s):  
Nawzat D. Aljbour ◽  
Mohammad D. H. Beg ◽  
Jolius Gimbun
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Hydrolysis Of

THE HYDROLYSIS OF CONJUGATED OESTRONE, OESTRADIOL-17β AND OESTRIOL IN HUMAN URINE

1958 ◽  
Vol 17 (4) ◽  
pp. 411-424 ◽  
Author(s):  
J. B. BROWN ◽  
H. A. F. BLAIR
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Human Urine ◽  
Major Error ◽  
Enzymic Hydrolysis ◽  
Patella Vulgata ◽  
Pregnancy Urine ◽  
Hydrolysis Of ◽  
Urine Specimens

SUMMARY The hydrolysis of the conjugates of oestrone, oestradiol-17β and oestriol present in human urine has been investigated using acids and the enzymes β-glucuronidase and phenol sulphatase derived from Patella vulgata. Using acid hydrolysis, maximum yields were obtained from the majority of urines by boiling 60 min with 15 vol. % concentrated hydrochloric acid. Under these conditions losses amounting to approx. 20% of the oestrogens present occur in concentrated urine specimens. These losses can be diminished by diluting the urine with water before hydrolysis. Using enzymic hydrolysis, maximum yields were obtained by incubating the urine for 96 hr at 37° C and pH 4·7 with approx. 600 u./ml. β-glucuronidase. When allowance was made for the losses which occur during acid hydrolysis, the yields from pregnancy and non-pregnancy urine were approximately the same by the two hydrolytic procedures. From this, it is inferred that no unknown major error exists in either procedure.

Hydrochloric Acid Hydrolysis of Pulps from Oil Palm Empty Fruit Bunches to Produce Cellulose Nanocrystals

2018 ◽  
Vol 26 (9) ◽  
pp. 3698-3709 ◽  
Author(s):  
Novitri Hastuti ◽  
Kyohei Kanomata ◽  
Takuya Kitaoka
Keyword(s):  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Oil Palm ◽  
Cellulose Nanocrystals ◽  
Empty Fruit Bunches ◽  
Hydrolysis Of
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