Thiobarbituric acid reaction of aldehydes and oxidized lipids in glacial acetic acid

Lipids ◽  
1985 ◽  
Vol 20 (12) ◽  
pp. 915-921 ◽  
Author(s):  
Hiroko Kosugi ◽  
Kiyomi Kikugawa
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Thiobarbituric Acid ◽  
Oxidized Lipids ◽  
Acid Reaction

scholarly journals Synthesis Of 5, 7-Diaryl-1,5-Dihydro (Or 1, 2, 3, 5-Tetrahydro)- Pyrano[2, 3-D] Pyrimidin-2, 4-Diones (Or 2-Thioxo-4-Ones).

2013 ◽  
Vol 25 (2) ◽  
pp. 124-131
Author(s):  
Mohammad Shahid Ullah ◽  
M Giasuddin Ahmed ◽  
UKR Romman ◽  
Kawsari Akhter ◽  
S Mosaddeq Ahmed ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Barbituric Acid ◽  
Thiobarbituric Acid ◽  
Chemical Society ◽  
Mass Spectral Data ◽  
Phosphorous Pentoxide ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
One Step

Some 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-d] pyrimidin-2, 4- diones (or 2-thioxo-4-ones) (3a-g) has been synthesized in one-step by the cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-d), in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-g were determined by their UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. Journal of Bangladesh Chemical Society, Vol. 25(2), 124-131, 2012 DOI: http://dx.doi.org/10.3329/jbcs.v25i2.15064

Improved Colorimetric Determination for Furfural in Citrus Juices

1974 ◽  
Vol 57 (2) ◽  
pp. 332-335 ◽  
Author(s):  
Howard L Dinsmore ◽  
Steven Nagy
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Colorimetric Method ◽  
Color Stability ◽  
Colorimetric Determination ◽  
Acid Reaction ◽  
Citrus Juices

Abstract An improved colorimetric method for furfural in citrus juices, which is based on the well known aniline-acetic acid reaction with furfural (Stenhouse reaction), is described. Addition of SnCl2 and HCl yielded higher intensity and improved color stability. The reagent giving the best results contained 1% SnCl2, 0.6N HCl, and 10% aniline in glacial acetic acid.

scholarly journals A One Pot Synthesis of 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-D] pyrimidin-2, 4-diones (or 2-thioxo-4-ones)

2013 ◽  
Vol 61 (2) ◽  
pp. 167-171 ◽  
Author(s):  
M Mahbubur Rahman ◽  
S Mosaddeq Ahmed ◽  
SMA Hakim Siddiki ◽  
Md Ershad Halim ◽  
Kawsari Akhter ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Barbituric Acid ◽  
Thiobarbituric Acid ◽  
Mass Spectral Data ◽  
Phosphorous Pentoxide ◽  
One Pot ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
One Step

A number of 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-d] pyrimidin-2, 4-diones (or 2-thioxo-4-ones) (3a-f) have been synthesized in one-step by cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-c), in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-f have been determined by UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. DOI: http://dx.doi.org/10.3329/dujs.v61i2.17065 Dhaka Univ. J. Sci. 61(2): 167-171, 2013 (July)

scholarly journals One step cyclocondensation of (thio) barbituric acid with chalcones in glacial acetic acid and phosphorous pentoxide, Part-II

2017 ◽  
Vol 52 (2) ◽  
pp. 115-124
Author(s):  
K Akhter ◽  
ME Halim ◽  
SM Ahmed ◽  
PK Sarkar ◽  
F Akter ◽  
...  
Keyword(s):  
Acetic Acid ◽  
13C Nmr ◽  
Glacial Acetic Acid ◽  
Barbituric Acid ◽  
Thiobarbituric Acid ◽  
Mass Spectral Data ◽  
Phosphorous Pentoxide ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
One Step

A number of new 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano [2, 3-d] pyrimidin-2, 4-diones (or 2-thioxo-4-ones) (3a-g) have  been synthesized in one-step by cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-d), in glacial  acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-g have been determined by UV, IR, 1H NMR, 13C  NMR, mass spectral data and elemental analyses. The compounds 3a-g do not seem to be available in the literature.Bangladesh J. Sci. Ind. Res. 52(2), 115-124, 2017

A Rapid and Specific Ultramicro Method for Total Serum Cholesterol

1962 ◽  
Vol 8 (3) ◽  
pp. 302-309 ◽  
Author(s):  
Robert E Bowman ◽  
Richard C Wolf
Keyword(s):  
Acetic Acid ◽  
Satisfactory Agreement ◽  
Glacial Acetic Acid ◽  
Total Serum ◽  
Total Serum Cholesterol ◽  
High Cholesterol ◽  
Absorbance Spectrum ◽  
Human Sera ◽  
Color Reagent ◽  
Acid Reaction

Abstract A modification of the Zak cholesterol reaction is described in which ethanol is substituted for glacial acetic acid. This modification avoids the hazard of purifying glacial acetic acid and also increases the specificity of the reaction by eliminating interference from bromide or iodide salts. The ethanolic reaction has the absorbance spectrum, sensitivity, and stability of the usual acetic acid reaction. A rapid ultramicro method has been developed based on this ethanolic reaction. A 0.01- to 0.05-ml. sample of serum is extracted with 2.5 ml. of ethanol, and a 2.0-ml. aliquot of this extract is reacted directly with 2.0 ml. of a Zak color reagent. Cholesterol concentrations as determined by this procedure and by the Sperry-Webb method showed satisfactory agreement for monkey and human sera, including normal, hemolyzed, high cholesterol, and severely lipemic or jaundiced sera..

scholarly journals A Simple Spectrophotometric Method for the Determination of Thiobarbituric Acid Reactive Substances in Fried Fast Foods

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Alam Zeb ◽  
Fareed Ullah
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Method ◽  
Glacial Acetic Acid ◽  
Thiobarbituric Acid ◽  
Potato Chips ◽  
Thiobarbituric Acid Reactive Substances ◽  
Acetic Acid Medium ◽  
Fast Foods ◽  
Acetic Acid Water

A simple and highly sensitive spectrophotometric method was developed for the determination of thiobarbituric acid reactive substances (TBARS) as a marker for lipid peroxidation in fried fast foods. The method uses the reaction of malondialdehyde (MDA) and TBA in the glacial acetic acid medium. The method was precise, sensitive, and highly reproducible for quantitative determination of TBARS. The precision of extractions and analytical procedure was very high as compared to the reported methods. The method was used to determine the TBARS contents in the fried fast foods such as Shami kebab, samosa, fried bread, and potato chips. Shami kebab, samosa, and potato chips have higher amount of TBARS in glacial acetic acid-water extraction system than their corresponding pure glacial acetic acid and vice versa in fried bread samples. The method can successfully be used for the determination of TBARS in other food matrices, especially in quality control of food industries.

scholarly journals One step cyclocondensation of (thio)barbituric acid with chalcones in glacial acetic acid and phosphorous pentoxide: Part-I

2016 ◽  
Vol 51 (2) ◽  
pp. 129-138
Author(s):  
K Akhter ◽  
SM Ahmed ◽  
Md E Halim ◽  
MA Kader ◽  
K Jahan ◽  
...  
Keyword(s):  
Acetic Acid ◽  
13C Nmr ◽  
Glacial Acetic Acid ◽  
Barbituric Acid ◽  
Thiobarbituric Acid ◽  
Mass Spectral Data ◽  
Phosphorous Pentoxide ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
One Step

Some new 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-d] pyrimidin-2, 4-diones (or 2-thioxo-4-ones) (3a-h) have been synthesized in one-step by cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-d), in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-h have been determined by UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. The compounds 3a-h do not seem to be available in the literatureBangladesh J. Sci. Ind. Res. 51(2), 129-138, 2016

A Simple Method for Estimation of Lipoxygenase and Cyclo-Oxygenase Pathways in Human Platelets - the Use of Thiobarbituric Acid Reaction

1980 ◽  
Vol 44 (02) ◽  
pp. 111-114 ◽  
Author(s):  
Hiroshi Takayama ◽  
Minoru Okuma ◽  
Haruto Uchino
Keyword(s):  
Time Course ◽  
Normal Values ◽  
Human Platelet ◽  
Thiobarbituric Acid ◽  
Human Platelets ◽  
Optimal Conditions ◽  
Experimental Conditions ◽  
Simple Method ◽  
Acid Reaction ◽  
Optimal Ph

SummaryTo develop a simple method for estimation of platelet lipoxygenase (PLO) and cyclo-oxygenase (PCO) pathways, the arachidonic acid (AA) metabolism of human platelet was investigated under various experimental conditions by the use of the thiobarbituric acid (TBA) reaction and a radioisotope technique. A TBA-reactive substance different from malondialdehyde (MDA) via PCO pathway was detected and shown to be derived from the PLO pathway. Since the optimal pH and time course of its formation were different from those of MDA formation via PCO pathway, PLO and PCO pathways were estimated by quantitating the TBA-reactive substances produced by the incubation of AA either with aspirin-treated platelets or with untreated ones, respectively, each under optimal conditions. Normal values expressed in terms of nmol MDA/108 platelets were 1.17±0.34 (M±SD, n = 31) and 0.79±0.15 (n = 31) for PLO and PCO pathways, respectively.

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