کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
681141 1460006 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radiation and optical properties of Nannochloropsis oculata grown under different irradiances and spectra
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Radiation and optical properties of Nannochloropsis oculata grown under different irradiances and spectra
چکیده انگلیسی


• Marine microalgae N. oculata were grown under white or red LEDs with different irradiances.
• Their absorption and scattering cross-sections were measured in the PAR region.
• Cross-sections and retrieved refraction index did not depend on incident spectra and irradiance.
• Absorption cross-section and absorption index decreased under nutrient limited conditions.

This paper reports accurate measurements of the radiation characteristics and optical properties of Nannochloropsis oculata in the photosynthetically active radiation (PAR) region. These marine microalgae were grown in 2 cm thick culture bottles with vented caps exposed, on one side, to either white fluorescent light bulbs or red LEDs emitting at 630 nm. The illuminance varied from 2000 to 10,000 lux. The microalgae average equivalent diameter ranged from 2.52 to 2.63 μm. Their radiation characteristics and optical properties were statistically identical over most of the PAR region. Other N. oculata grown with 2 vol.% CO2 injection in 1 cm thick flat bottles exposed to light from both sides reached a significantly larger mass concentration and featured lower pigment concentration and smaller absorption cross-sections. This was due to nutrient limited growth conditions. The refraction index was independent of illuminance, spectrum, and growth conditions and featured resonance at wavelengths corresponding to absorption peaks.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 137, June 2013, Pages 63–73
نویسندگان
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