Isolation and characterization of wood components with aqueous acetic acid

Proteins extracted from reduced and carboxymethylated feather keratins (SCM-keratins) have been studied by Harrap and Woods (1964a, 1964b, 1967). They have demonstrated the presence of electrophoretic heterogeneity amongst the proteins and have obtained a molecular weight of approximately 11,000 in agreement with earlier work of Woodin (1954). There was no indication of marked heterogeneity with respect to size. Using acid hydrolysis and determination of acetic acid produced they found an acetyl content of 1 �30 molesj104 g in the rachis off owl feathers. These were thought to be attached to primary amino groups since there were no O-acetyl groups. In the present paper the isolation and characterization of the predominant, and probably sole, amino-terminal tripeptide from goose feather calamus is described. Goose feather calamus was chosen because its extracted proteins had one of the simplest electrophoretic patterns of proteins from the feathers of a number of species (Harrap and Woods 1967).

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Isolation and characterization of rhizomicrobial isolates for phosphate solubilization and indole acetic acid production

Journal of the Korean Society for Applied Biological Chemistry ◽

10.1007/s13765-015-0114-y ◽

2015 ◽

Vol 58 (6) ◽

pp. 847-855 ◽

Cited By ~ 8

Author(s):

Khalid Abdallah Hussein ◽

Jin Ho Joo

Keyword(s):

Acetic Acid ◽

Acid Production ◽

Indole Acetic Acid ◽

Phosphate Solubilization ◽

Acetic Acid Production ◽

Indole Acetic Acid Production ◽

Isolation And Characterization

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Fluorinated tricyclic neuroleptics with prolonged action: 3-Fluoro-8-trifluoromethyl derivatives of 10-(4-methylpiperazino)- and 10-[4-(2-hydroxyethyl)piperazino]-10,11-dihydrodibenzo-[b,f]thiepin

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19810118 ◽

1981 ◽

Vol 46 (1) ◽

pp. 118-140 ◽

Cited By ~ 5

Author(s):

Karel Šindelář ◽

Miroslav Ryska ◽

Jiří Holubek ◽

Emil Svátek ◽

Jiřina Metyšová ◽

...

Keyword(s):

Acetic Acid ◽

Prolonged Action ◽

Substitution Reactions ◽

Isolation And Characterization ◽

Chloro Derivative ◽

Derivatives Of ◽

Enol Ester ◽

Preparative Purpose ◽

Hydroxyethyl Piperazine

A reaction of (4-fluoro-2-iodophenyl)acetic acid with 4-(trifluoromethyl)thiophenol gave the acid VIII which was cyclized with the reagent consisting from methanesulphonic acid and phosphorus pentoxide and afforded the methanesulphonic enol ester XIX. The alkaline hydrolysis resulted in 3-fluoro-8-trifluoromethyldibenzo[b,f]thiepin-10(11H)-one (XVI) which was transformed via the alcohol XXIV to the chloro derivative XXV. Substitution reactions with 1-methylpiperazine and 1-(2-hydroxyethyl)piperazine resulted in the title compounds IV and V. These products are very potent cataleptic neuroleptic agents with a prolongation of duration of the effects comparable to that of isofloxythepin and tefluthixol. A series of further synthetic experiments aimed at alternative syntheses of the acid VIII and the ketone XVI; their results were mostly not of use for preparative purpose but they led to isolation and characterization of a series of interesting heterocyclic products (XVII, XVIII, XXII, XXIII, XXIX-XXXI, XXXVI-XXXIX).

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