Effects of Temperature and Other Operational Parameters on Chlorella vulgaris Mass Cultivation in a Simple and Low-Cost Column Photobioreactor.

Mass production of microalgae worldwide, and even more so in developing countries, is strongly contingent upon the availability of economical and efficient photobioreactors (PBRs) that are amenable for use in resource-limited environments. Such options are limited. This work assesses the effects of temperature, CO2 enrichment, and mixing by air + CO2 bubbling on Chlorella vulgaris biomass production in a simple, low-cost 84-L column PBR.

Free and bound cinnamic acid derivatives in corsica sweet blond oranges.

Total determination of cinnamic acids (CA), including hydroxycinnamic acid derivatives is generally not accurate since, during hydrolysis, a possible degradation of dihydroxy CA such as caffeic acid could occur. Evaluations of CA (ferulic, p-coumaric, sinapic, cinnamic and caffeic acids) before and after hydrolysis have been undertaken using standards and either with or without addition of ascorbic acid and EDTA. The method was then applied to the determination of free and bound CA in five blond cultivars (Navelina, Washington navel, Pera, Salustiana and Valencia late) of sweet oranges [Citrus sinensis (L.

Antioxidant activities of polyphenols extracted from Perilla frutescens varieties.

Various cultivars of Perilla frutescens (L.) (var. crispa and var.

Anthocyanin and flavonoid production from Perilla frutescens: pilot plant scale processing including cross-flow microfiltration and reverse osmosis.

Extraction and concentration at a pilot plant scale of anthocyanins and flavonoids from Perilla frutescens var. frutescens harvested in the Guangzhou area of China were investigated. The study of extraction efficiency using mineral acids and organic acids showed that 0.