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Biomolecules from Microalgae for Commercial Applications
Published in Kalyan Gayen, Tridib Kumar Bhowmick, Sunil K. Maity, Sustainable Downstream Processing of Microalgae for Industrial Application, 2019
Meghna Rajvanshi, Uma Shankar Sagaram, G. Venkata Subhash, G. Raja Krishna Kumar, Chitranshu Kumar, Sridharan Govindachary, Santanu Dasgupta
Apart from a superior AA profile, another important aspect of proteins from algae utilized as a food source is their protein quality. According to the Food and Agriculture Organization (FAO) and WHO, the protein quality is determined by the essential AA profile (which should match the requirements of the body), its digestibility and the bioavailability of the AAs (Gurevich 2014). Multiple methods are available to estimate protein quality: protein efficiency ratio (PER), biological value (BV), net protein utilization (NPU), protein digestibility corrected amino acid score (PDCAAS) and digestible indispensable amino acid scores (DIAAS). Since 1989, PDCAAS has been the most recommended method by the FAO-WHO for protein quality evaluation. The PDCAAS of egg, whey and soy proteins are in the range of 0.9 to 1. In 2013, the FAO-WHO proposed replacing PDCAAS with DIAAS to address individual dietary AA digestibility (Lee et al. 2016). DIAAS can overcome the limitations of PDCAAS; however, the applicability of DIAAS will largely depend on sufficient research data in favor of DIAAS (Leser 2013).
Growth responses of Clarias gariepinus fingerlings fed differently boiled periods of rubber (Hevea brasilensis) leaves-based diets
Published in Egyptian Journal of Basic and Applied Sciences, 2019
Despite the substantial level of hydrocyanic acid (HCN) in the hydrothermally processed leaves of rubber and a significant reduction in the level of crude protein, growth performance of C. gariepinus fed the diets containing hydrothermally processed rubber leaves meal was significantly improved with increased period of boiling. Hydrothermal processing for 10 min resulted in the best final weight, weight gain, growth rate, feed conversion ratio, feed conversion efficiency, protein efficiency ratio and apparent net protein utilization.