5 research outputs found
Comparative study of anthocyanin extraction methods in Dahlia pinnata petals
Anthocyanins are phenolic compounds responsible for the color of numerous plant sources. In literature, there is little information about the dahlia flower as a potential source of anthocyanins. This study aimed to develop a procedure for anthocyanins extraction from black dahlia petals using fresh and dehydrated material. A three-stages nested design was used to develop the methodology, 3 solid-liquid-ratios and 6 dissolvents nested in 3 methods. The highest yields were obtained with the homogenization assisted maceration technique, citric acid solvent (2, 4, 6%), and a ratio of 1:30 with dry petals. The results of this study show the opportunity to obtain a high anthocyanin content from black dahlia and open the possibility to use it as another important source of this pigment
Bioprocess of Gibberellic Acid by <i>Fusarium fujikuroi</i>: The Challenge of Regulation, Raw Materials, and Product Yields
Gibberellic acid (GA3) is a tetracyclic diterpenoid carboxylic acid synthesized by the secondary metabolism of Fusarium fujikuroi. This phytohormone is widely studied due to the advantages it offers as a plant growth regulator, such as growth stimulation, senescence delay, flowering induction, increased fruit size, and defense against abiotic or biotic stress, which improve the quality and yield of crops. Therefore, GA3 has been considered as an innovative strategy to improve agricultural production. However, the yields obtained at large scale are insufficient for the current market demand. This low productivity is attributed to the lack of adequate parameters to optimize the fermentation process, as well as the complexity of its regulation. Therefore, this article describes the latest advances for potentializing the GA3 production process, including an analysis of its origins from crops, the benefits of its application, the related biosynthetic metabolism, the maximum yields achieved from production processes, and their association with genetic engineering techniques for GA3 producers. This work provides a new perspective on the critical points of the production process, in order to overcome the limits surrounding this modern line of bioengineering
Patented technologies in the extraction, preservation, and application of anthocyanins in food: A review
Color is an important parameter in food because it can be associated with quality. Since ancient times, natural dyes have been used in foods to make them attractive, but due to their poor stability to environmental factors and production processes, technologies emerged over time that led to getting artificial pigments with high stability, low production costs, and high dyeing capacity. However, some adverse indications of health damage have been reported, and that is why there is a growing interest in using natural colorants in food again. The red color is one of the most striking and important tones in the food sector since it is attractive, and it can produce expected taste sensations. One of the natural pigments that provide this red hue are anthocyanins, compounds that are widely distributed in plant sources, unlike artificial colors, have been associated with multiple health benefits. However, the application of anthocyanins represents a challenge due to their low stability against factors such as pH, oxygen, light, and temperature, so they are being stabilized through chemistry or physics way. This work aims to highlight the importance of anthocyanins and illustrate a summary of stabilization and conservation strategies used in patents applied in the food industry, as a methodological background to increase the use of natural pigments in diets
A rare variant in MYH6 is associated with high risk of sick sinus syndrome
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95597.pdf (publisher's version ) (Closed access)Through complementary application of SNP genotyping, whole-genome sequencing and imputation in 38,384 Icelanders, we have discovered a previously unidentified sick sinus syndrome susceptibility gene, MYH6, encoding the alpha heavy chain subunit of cardiac myosin. A missense variant in this gene, c.2161C>T, results in the conceptual amino acid substitution p.Arg721Trp, has an allelic frequency of 0.38% in Icelanders and associates with sick sinus syndrome with an odds ratio = 12.53 and P = 1.5 x 10(2). We show that the lifetime risk of being diagnosed with sick sinus syndrome is around 6% for non-carriers of c.2161C>T but is approximately 50% for carriers of the c.2161C>T variant