Optimization of the extraction of chlorophylls in green beans (Phaseolus vulgaris L.) by N,N-dimethylformamide using response surface methodology

Chlorophyll Extraction from Microalgae: A Review on the Process Engineering Aspects

“…However, exposure of chlorophyll molecules to weak acids, oxygen or light accelerated their oxidation and resulted in the formation of numerous degradation products [2,4,5]. Figures 1, 2, and 3 shows the structures of the chlorophyll compounds.…”

“…All of the nitrogen atoms face inward creating a central hole where an Mg 2+ metal ion easily binds [7]. In chlorophyll b, the methyl group in ring II of chlorophyll a is replaced by a formyl group [5,7]. This structural difference results in chlorophyll a being a blue/green pigment with maximum absorbance from 660 to 665 nm and chlorophyll b being a green/yellow with maximum absorbance from 642 to 652 nm [2].…”

“…Since chlorophyll is highly reactive, the yield of a particular extraction procedure is also affected by the formation of degradation products. Degradation products of chlorophyll are formed when their molecules are exposed to excess light, oxygen/air, high temperatures and acidic or basic conditions [4,5]. Table 1 shows previous studies on organic solvent extraction of microalgal chlorophyll.…”

Composition and bioactivity of tea flower polysaccharides obtained by different methods

“…However, with the increasing ultrasound power, the neutral saccharides and acid saccharides changed irregularly related to increasing ultrasound power. Extraction of natural products by different methods may yield different chemical components (Bengtsson, Namutebi, Alminger, & Svanberg, 2008;Cao, Xiao, & Xu, 2007;Cubas, Lobo, & González, 2008;Kalia, Sharma, Singh, & Singh, 2008;ma et al, 2008;Sharma et al, 2008). From Figs.…”

Determination of optimal phenanthrene, sulfate and biomass concentrations for anaerobic biodegradation of phenanthrene by sulfate-reducing bacteria and elucidation of metabolic pathway

“…A thorough understanding of the effect of these factors on PHE biodegradation is required. The rotatable central composite design (RCCD) and response surface methodology (RSM) have been widely used in multifactor experiments to interpret the relationship between the independent and dependent variables [23][24][25]. This experimental strategy allows a large number of factors to be screened simultaneously and can reduce the number of experiments.…”