Results 51 to 60 of about 913 (90)

Rate Studies on the Hydrolysis of Niacinamide

Journal of Pharmaceutical Sciences, 1962
Abstract The apparent first-order rate constant corresponding to the hydrolysis of niacinamide has been determined over the pH range 0.4–11.3 in purely aqueous solutions at 89.4. Although the pH-rate profile shows a minimum between pH 4 and 6, the reaction velocity is relatively slow over the usual pharmaceutical range. Surprisingly, the second-order
P, FINHOLT, T, HIGUCHI
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Niacinamide in canned tomato sauce

Bulletin of Environmental Contamination and Toxicology, 1984
Au cours d'une recherche de pesticides dans de la sauce tomate en boite, mise en evidence d'une reponse analytique inconnue d'un compose contenant de l'azote. Identification par chromatographie en phase gazeuse-spectrometrie de masse de la niacinamide (amide de l'acide pyridine-3 carboxylique, ou vitamine B3) a la dose de 3-4 ...
T, Cairns, E G, Siegmund, G M, Doose
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Niacinamide

Dermatologic Surgery, 2005
In multiple chronic clinical studies, topical niacinamide (vitamin B3) has been observed to be well tolerated by skin and to provide a broad array of improvements in the appearance of aging facial skin (eg, reduction in the appearance of hyperpigmentated spots and red blotchiness).To clinically determine the effect of topical niacinamide on additional ...
Donald L, Bissett, John E, Oblong, Cynthia A, Berge   +2 more
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The effect of niacinamide on osteoarthritis: A pilot study

Inflammation Research, 1996
To evaluate the effect of niacinamide, on selected parameters of osteoarthritis using a double-blind, placebo controlled study design.Seventy two patients with osteoarthritis were randomized for treatment with niacinamide or an identical placebo for 12 weeks.
W B, Jonas, C P, Rapoza, W F, Blair
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Nicotinic acid/niacinamide and the skin

Journal of Cosmetic Dermatology, 2004
SummaryNicotinic acid (also generally known as niacin) and niacinamide (also known as nicotinamide) are similarly effective as a vitamin because they can be converted into each other within the organism. The blanket term vitamin B3 is used for both.Niacinamide is a component of important coenzymes involved in hydrogen transfer.
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Gas-Liquid Chromatography of Niacin and Niacinamide

Journal of Pharmaceutical Sciences, 1968
A procedure has been developed for the qualitative and quantitative determination of niacin and niacinamide by gas-liquid chromatography. Niacin was determined as its ethyl ester (ethyl nicotinate) or as N -ethylnicotinamide. Niacinamide was determined as niacinamide or converted to either ethyl nicotinate or N -ethylnicotinamide. An immobile biphase
A R, Prosser, A J, Sheppard
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Direct Determination of Niacinamide in Multivitamin Preparations

Journal of Pharmaceutical Sciences, 1961
Abstract A simple method for the direct determination of niacinamide in pharmaceutical preparations is described. The method involves the reaction of niacinamide in potassium dihydrogen phosphate with cyanogen bromide and barbituric acid. The resulting purple color has a maximum absorbance at 550 m μ . Niacin does not interfere in the reaction unless
O, PELLETIER, J A, CAMPBELL
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Niacinamide and Acanthosis Nigricans

Archives of Dermatology, 1984
To the Editor.— A side effect of high-dose niacinamide therapy, not mentioned in the October 1983,Archivesarticle entitled "Response of Generalized Granuloma Annulare to High-Dose Niacinamide," 1 is acanthosis nigricans. The following cases, encountered recently, illustrate the potential for a reaction when the association is overlooked.
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Polarographic assay of niacinamide in pharmaceutical preparations

Journal of Pharmaceutical Sciences, 1969
A rapid polarographic determination of niacinamide pharmaceutical preparations had been developed and is compared with the Konig colorimetric assay using barbituric acid. The niacinamide is extracted from the sample using a combination column and liquid-liquid partition chromatography. The extracted niacinamide is determined in a supporting electrolyte
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An Evaluation of Niacinamide in the Treatment of Childhood Schizophrenia

American Journal of Psychiatry, 1970
The author evaluated 57 schizophrenic children clinically and psychologically before and after a six-month administration of niacinamide. They were separated into three groups: those given niacinamide, those given niacinamide plus a tranquilizer, and those given a placebo. There was no significant difference attributable to niacinamide; also, tests for
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