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Oxidative Decarboxylation and Deamination of Essential Amino Acids by Nicotinium Dichromate – a Kinetic Study

100%

Vivekanandan K. , Lakshmi Narayanan R.

International Letters of Chemistry, Physics and Astronomy

2015

tom Vol. 45

66-72

The oxidation of essential amino acids like valine, leucine, isoleucine, threonine, phenylalanine and histidine using nicotinium dichromate in aqueous medium in presence of perchloric acid at 313 K leads to the formation of corresponding aldehydes. The reaction is first order with respect to nicotinium dichromate, fractional order with respect to amino acids and second order with respect to perchloric acid. Increase in ionic strength by the addition of sodium perchlorate has no effect on the rate constant. There is no polymerization with acrylonitrile. The reaction has been studied at different temperatures and a mechanism confirming to the kinetic observations is suggested.

Peculiarities of the Chemical Composition of Kohlrabi Varieties Cultivated in Ukraine

100%

Ketskalo V. , Voitovska V. , Kononenko L. , Kovtuniuk Z. , Herasymchuk H. , Borysenko V. , Storozhyk L. , Yevchuk Y. , Poltoretska N. , Vyshnevska L.

tom Vol. 24, iss. 5

46--50

The paper presents the results of experimental research on the peculiarities of the chemical composition of kohlrabi varieties ‘Azur’, ’Videnska Synia’, ‘Videnska Bila’ and ‘Hihant’ cultivated in field conditions in the Forest Steppe of Ukraine. The goal of the research was to track changes in the biochemical composition of kohlrabi under the effect of varietal factor. The experiment was carried out in the years 2018−2021. It was found that the vegetation period of the variety ‘Hihant’ is 145 days, while the vegetation period of varieties ‘Azur’, ‘Videnska Synia’ and ‘Videnska Bila’ ranges between 60 and 80 days. As a result of the longer vegetation period, ‘Hihant’ overcomes other varieties under study by the content of water (88.7%) and dietary fiber (2.1 g/kg). Kohlrabi variety ’Videnska Synia’ is the most suitable for dietary nutrition, since it has a higher content of vitamins A, B1, B9, B4, C, B3, and essential amino acids, such as arginine, valine, histidine, isoleucine, leucine, lysine and phenylalanine, compared to other varieties. The content of linoleic, linolenic and palmitic acids is also the highest in ’Videnska Synia’. However, the content of vitamin B6 is the highest in ‘Hihant’.

Вафельні торти поліпшеного амінокислотного складу

51%

Boidunyk R.

Path of Science

2017

tom 3

nr 11

2001-2011

У статті наведено результати дослідження амінокислотного складу розроблених нових вафельних тортів із жировими начинками з використанням природних добавок. Підтверджено доцільність застосування нетрадиційної сировини (порошок іван-чаю, жмих насіння маку, кероб), а також сухого знежиреного молока з метою підвищення біологічної цінності вафельних тортів та покращення їх амінокислотного складу.

The article presents the results of the study of the amino acid composition of newly developed wafer cakes with adipose fillings combined with natural additives. The appropriateness of the using non-traditional raw materials (powder of willow herb, poppy oilcake, carob), as well as skimmed milk powder in order to increase the biological value of wafer cakes and improve their amino acid composition is proven.