Results 161 to 170 of about 11,283 (220)

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.
exaly   +3 more sources

Cosmeceutical Aptitudes of Niacinamide: A Review

Recent Advances in Anti-Infective Drug Discovery, 2021
Background: The prevalence and scope of dermatological illness differ from region to region. Based upon type and severity, the conditions may vary from superficial to deep systemic skin infections. Niacinamide, an amide analog of vitamin B3 which was conventionally utilized as a food supplement, is now explored for the management of skin disorders ...
Piyush Madaan, Priyanshi Sikka, Deepinder Singh Malik   +2 more
openaire   +2 more sources

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
openaire   +2 more sources

Determination of Niacinamide in Pharmaceutical Preparations

Journal of Pharmaceutical Sciences, 1969
A method for the isolation of niacinamide from multi-component pharmaceutical preparations by partition chromatography between a diatomaceous earth-water column and chloroform followed by measurement of UV absorbance at 262 mμ is proposed. A second method using the color produced by the niacinamide in the column eluate with bromothymol blue in ...
M T, Jeffus, C T, Kenner
openaire   +2 more sources

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
openaire   +2 more sources

Niacin and Niacinamide Biosynthesis in Insects

Science, 1952
It has recently been shown that niacin can be formned from tryptophan in mammals (1), but cannot be formed in the larval stage of insects, such as 'The authors are indebted to K. Nakamura, M. Takanami, and S. Higashi. This work was supported in part by a grant from the Science Research Fund No. 4009, Ministry of Education.
M, Kato, Y, Hamamura
openaire   +2 more sources

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
openaire   +2 more sources

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.
openaire   +1 more source

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
openaire   +2 more sources