Bioactive Metabolites of Microalgae from Canary Islands for Functional Food and Feed Uses

Abstract

Three freshwater microalgae (Spirogyra sp., Cosmarium sp., and Cosmarium blytii) collected from several locations in Gran Canaria have been studied to explore their potential as a novel source of bioactive compounds for biotechnological applications. Soluble carbohydrates were quantified after extraction with 3 M HCl at 100 °C, ranging from 35.8 to 43.3 %, and with water at room temperature, ranging from 19 to 22.8 %. Amino acids glutamic acid, proline and aspartic acid were quantified by RP-HPLC. Glutamic acid was the most abundant, ranging from 12.2 to 3.63 mg g À 1 of dry biomass. Cosmarium blytii was the richest sample in amino acids (24.02 mg g À 1 of dry weight). In addition, Cosmarium blytii and Spyrogira sp. exhibited higher radical scavenging activity (RSA) against 1,1-diphenyl-2-picrylhydrazyl (DPPH) than that of the synthetic antioxidant butylhydroxytoluene (BHT), commonly used as food additive. These results show a great potential of these microalgae for exploitation in the food, feed and pharmaceutical industries.

Revalorization of Coconut from Guerrero, Mexico: Isolation and Characterization of Oils and Proteins

“…As food ingredients, glutamic acid contributes to the flavor of meat, soy sauce, seafood, and some processed foods. In addition, glutamic acid supplementation could be advantageous due to its beneficial effects in protecting the intestine from oxidative stress, regulating the intestinal damage caused by mycotoxins, lowering blood pressure, reducing the risk of cardiovascular diseases, and increasing the efficacy and decreasing the toxicity of anticancer drugs …”

“…In addition, glutamic acid supplementation could be advantageous due to its beneficial effects in protecting the intestine from oxidative stress, regulating the intestinal damage caused by mycotoxins, lowering blood pressure, reducing the risk of cardiovascular diseases, and increasing the efficacy and decreasing the toxicity of anticancer drugs. 55 Functional Characterization of Storage Proteins. Protein Solubility.…”

Optimization of Melanin Production by Streptomyces antibioticus NRRL B-1701 Using Arthrospira (Spirulina) platensis Residues Hydrolysates as Low-Cost L-tyrosine Supplement

“…The L-tyrosine standard (Himedia TM , Mumbai, India), F-DBRH, and HAO-DBRH were prepared for HPLC analysis based on the procedures outlined in Kwanyuen and Burton [ 33 ] and Santiago-Díaz et al [ 34 ] with slight modifications. To summarize, 1 mL of supernatant was lyophilized using a lyophilizer (Labconco, Kansas, MO, USA) and, subsequently, dissolved in a 1 mL solution consisting of a mixture of ethanol (EtOH) (RCl Labscan Limited, Bangkok, Thailand), DI water, and triethylamine (TEA) (Thermo Fisher Scientific TM , Loughborough, UK) in a 2:1:1 ratio.…”

An overview of fermentation in the food industry - looking back from a new perspective

“…For food applications, strain engineering often involves harmless microorganisms like Bacillus spp., yeast like Saccharomyces cerevisiae , Komagataella phaffii , Kluyveromyces spp., or filamentous fungi (Augustin et al 2023 ; Chai et al 2022a , b ; Vieira Gomes et al 2018 ). Specific food components like antioxidants, colorants, flavors, enzymes, and vitamins can also be manufactured through fermentation (Santiago‐Díaz et al 2022 ). Antioxidants, bacteriocins, pigments, enzymes, and other food components are increasingly being manufactured utilizing food waste as a fermentation substrate.…”