Abstract

Today, the use of nutrients derived from natural bioactive compounds application in the food, pharmaceutical, and cosmetic industries is on the increase. This paper aimed to evaluate the amino acids profile (essential and non-essential) and pigments composition (chlorophyll a, carotenoids, and phycocyanin) of Arthrospira platensis (a blue-green microalga) cultivation in a flat-plate photobioreactor under various types of light-emitting diodes (red: 620–680 nm, white: 380–780 nm, yellow: 570–600nm, blue: 445–480 nm). The maximum biomass concentration (604.96 mg L⁻¹) occurred when the red LED was applied for cultivation, and the minimum biomass concentration (279.39 mg L⁻¹) was obtained under blue LED. The sequence of pigments and amino acids concentrations (mg L⁻¹_{culture volume}) was approximately in accordance with the biomass productivity. It means the red light produces the maximum concentration of pigments (chlorophyll a: 5.42, carotenoids: 2.92, phycocyanin: 67.54 mg L⁻¹) and amino acids (essential amino acids: 110.47, nonessential amino acids: 179.10 mg L⁻¹). Nevertheless, when these values were measured in mg per g of dry weight, the utmost contents were observed in microalgal products cultivated under blue LED. These consequences are due to the highest cell productivity and the most extended length of cells that occurred under red and blue LEDs, respectively.

摘要

今天，从天然生物活性化合物中提取的营养素在食品、制药和化妆品行业中的使用正在增加。本文旨在评估平板光生物反应器中平板光生物反应器中培养的钝顶藻（一种蓝绿色微藻）的氨基酸谱（必需和非必需）和色素组成（叶绿素a、类胡萝卜素和藻蓝蛋白）。- 发光二极管（红色：620-680 nm，白色：380-780 nm，黄色：570-600nm，蓝色：445-480 nm）。的最大的生物量浓度（604.96毫克的L ^-1时涂敷了用于栽培红色LED发生），和最小生物量浓度（279.39毫克的L ^-1) 在蓝色 LED 下获得。色素和氨基酸浓度的顺序（mg L ^-1_培养体积）大致与生物质生产力一致。这意味着红光产生最大浓度的色素（叶绿素a：5.42，类胡萝卜素：2.92，藻蓝蛋白：67.54 mg L ^-1）和氨基酸（必需氨基酸：110.47，非必需氨基酸：179.10 mg L ^-1）。然而，当这些值以 mg/g 干重为单位测量时，在蓝光 LED 下培养的微藻产品中观察到最大含量。这些结果是由于分别在红色和蓝色 LED 下出现最高的电池生产率和最长的电池长度。