A Comprehensive Study on Molecular Interactions of l-Ascorbic Acid/Nicotinic Acid in Aqueous [BMIm]Br at Varying Temperatures and Compositions: Spectroscopic and Thermodynamic Insights

2021 ◽  
Vol 66 (10) ◽  
pp. 3859-3880
Author(s):  
Richu ◽  
Ashwani Kumar
Keyword(s):  
Ascorbic Acid ◽  
Nicotinic Acid ◽  
Molecular Interactions ◽  
Comprehensive Study

Tryptophan and nutritional status of patients with senile dementia

1986 ◽  
Vol 16 (2) ◽  
pp. 297-305 ◽  
Author(s):  
D. E. Thomas ◽  
K. O. Chung-A-On ◽  
J. W. T. Dickerson ◽  
S. F. Tidmarsh ◽  
D. M. Shaw
Keyword(s):  
Ascorbic Acid ◽  
Nutritional Status ◽  
Nicotinic Acid ◽  
Patient Group ◽  
Senile Dementia ◽  
Plasma Concentrations ◽  
Red Cell ◽  
Plasma Ascorbic Acid ◽  
Thiamin Deficiency ◽  
Transketolase Activity

SynopsisThe nutritional status of 23 severely demented patients was compared with that of 23 similarly aged controls in the community. A 3-day weighed intake on all subjects showed lower mean intakes of energy, protein, ascorbic acid and nicotinic acid in the patient group. This group had lower levels of plasma ascorbic acid and red cell folate and of urinary N-methylnicotinamide excretion relative to creatinine. Over a third of both controls and patients had evidence of thiamin deficiency, as judged by a raised percentage erythrocyte transketolase activity. An earlier finding in patients with senile dementia of reduced fasting plasma concentrations of tryptophan was confirmed for total and protein bound fractions. With the possible exception of ascorbic acid, the data could not be explained satisfactorily in terms of intake. It is suggested that the association between the phenomena of ageing, senile dementia and nutritional status merits further investigation.

Enzymic measurement of cholesterol in serum with the CentrifiChem centrifugal analyzer.

1977 ◽  
Vol 23 (2) ◽  
pp. 280-282 ◽  
Author(s):  
M A Pesce ◽  
S H Bodourian
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Nicotinic Acid ◽  
Cholesterol Oxidase ◽  
Correlation Coefficients ◽  
Cholesterol Esterase ◽  
Hantzsch Reaction ◽  
Rate Method ◽  
High Concentrations ◽  
Enzymic Assay

Abstract Cholesterol is measured by mixing 5 mul of sample with 350 mul of a reagent consisting of phenol, 4-aminoantipyrine, and the enzymes cholesterol oxidase, cholesterol esterase, and peroxidase. After 12 min, the resulting quinoneimine is measured at 520 nm. Readings and cholesterol concentrations are linearly related up to 4.0 g/liter. Lipemic sera and samples containing uric acid (up to 200 mg/liter), hemoglobin (up to 1 g/liter), and certain drugs (clofibrate, phenobarbital, nicotinic acid, Ketochol, Ovral-28), gave no interference. Abnormally high concentrations of bilirubin and ascorbic acid in serum lowered the cholesterol values. This enzymic assay, compared with the method of Abell and with a rate method that uses the Hantzsch reaction, gave correlation coefficients of 0.987 and 989, respectively.

ASCORBIC ACID, RIBOFLAVIN, THIAMIN, AND NICOTINIC ACID IN RELATION TO SEVERE INJURY, HEMORRHAGE, AND INFECTION IN THE HUMAN

1946 ◽  
Vol 124 (5) ◽  
pp. 840-856 ◽  
Author(s):  
S M Levenson ◽  
R W Green ◽  
F H L Taylor ◽  
P Robinson ◽  
R C Page ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Nicotinic Acid ◽  
Severe Injury
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