کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8086228 | 1521804 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Diurnal variation of various culture and biochemical parameters of Arthrospira platensis in large-scale outdoor raceway ponds
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کلمات کلیدی
pulse amplitude modulatedDICmaximum quantum yield of photosystem IISLLPhycocyaninPBRPAMPSIIArthrospira (Spirulina) platensisFv/Fm - Fv / FmROS - ROSdissolved oxygen - اکسیژن محلولPhotosynthetically active radiation - تابش فعال فتوسنتزیDiurnal variation - تنوع روزانهPar - توسطminimal fluorescence yield - حداقل عملکرد فلورسانسmaximal fluorescence yield - حداکثر عملکرد فلورسانسRaceway pond - حوضچه ی RacewayPhotosynthetic pigment - رنگدانه فتوسنتزPhotoinhibition - عکسبرداریPhotobioreactor - فتوبیوراکتورPhotosystem II - فتوسیستم 2Mass culture - فرهنگ توده ایReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The use of microalgae for nutraceuticals, food, and feed has recently gained great interest. Having a good understanding of the trends, including the diurnal variations, of the physiological parameters and biochemical composition of the biomass in commercial scale systems is of high importance as it may lead to finding potential ways to optimize productivity and product quality. Not much is known about the diurnal variation of the physiological parameters and biochemical composition of microalgae grown in large-scale outdoor raceway ponds in general and Arthrospira in particular, even though a lot is known about such diurnal variations in natural aquatic and laboratory environments. Arthrospira (Spirulina) platensis is a filamentous cyanobacterium widely used as dietary supplement, functional food, food, and animal feed. It has been grown commercially for about 40Â years. In the present experiments the diurnal variation of some photosynthetic parameters and of the product quality was studied in Arthrospira platensis grown outdoors in a 5000Â m2 raceway pond over a 24-hour period at three different months of the year. Specific trends for Arthrospira in commercial scale setup were described for the first time. Significant variation was observed in the biomass composition throughout the course of the day. The photosynthetic pigment content of Arthrospira (chlorophyll a, total carotenoids, and total phycocyanin) declined during the light hours, and recovered during the night. The same pattern was seen in the case of the crude protein content of the biomass. The total carbohydrate content however showed an opposite trend to that of the protein. Selected parameters were simulated in the lab in benchtop photobioreactors and the trends were compared with the large-scale system. The results of the experiments are discussed in relation to diurnal changes in some physical and chemical factors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Algal Research - Volume 29, January 2018, Pages 121-129
Journal: Algal Research - Volume 29, January 2018, Pages 121-129
نویسندگان
Nora Hidasi, Amha Belay,