MODELING SOLID–LIQUID EXTRACTION KINETICS OF <i>TRANS</i>‐RESVERATROL AND <i>TRANS</i>‐ε‐VINIFERIN FROM GRAPE CANE

Karacabey, Erkan; Bayındırlı, Levent; Artık, Nevzat; Mazza, G.

doi:10.1111/j.1745-4530.2011.00660.x

Cited by 59 publications

(32 citation statements)

References 19 publications

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“…3b). Quality and quantity of the extracts dependent of the target compounds structures, natural sources and type of processes (Karacabey et al, 2011), this explain the fact that with MAE procedure obtained different phenolic composition in the extracts. These findings suggest that MAE procedure is an alternative method to obtain extracts with high potential antioxidants of these plants in a few minutes, compared with the conventional method.…”

Section: Discussionmentioning

confidence: 94%

“…It is important to develop models for the extraction process where different extraction operating parameters are optimized for process economics (Ho et al, 2008). One of them is kinetic model which offers excellent basis for curve fitting as a function of process conditions of both the extraction medium and the extracting plant material is a useful tool for an objective, fast and economic assessment of any processes (Karacabey et al, 2011).…”

Section: Ajabsmentioning

confidence: 99%

“…MAE overall experimental data were fitted with three empirical mathematical models: Two-site kinetic model (Karacabey et al, 2011) and saturation simple equation in order to determine the best model describing the behavior of microwave-assisted extraction of TPC in semiarid region plants studied.…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…The experimental and theoretical extraction curves are shown in the Fig. 2A-D. The advantage of Monod's equation against Two-site kinetic model is that first one is composed only for two terms whereas second one include four terms making the model more complicated (Karacabey et al, 2011).…”

Section: Model Fitting For Mae Proceduresmentioning

confidence: 99%

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Microwave-Assisted Extraction of Phenolic Antioxidants From Semiarid Plants

Wong-Paz

Contreras-Esquivel

Muñiz‐Márquez

et al. 2014

American Journal of Agricultural and Biological Sciences

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Microwave-Assisted Extraction (MAE) kinetic in three temperatures was investigated for extraction of antioxidant phenolic compounds from Jatropha dioica, Flourensia cernua, Eucalyptus camaldulensis and Turnera diffusa which are plants of semiarid regions of Mexico. The two-site kinetic model and saturation simple equation were used to describe the experimental data. The fit of the data demonstrated that saturation simple equation was better and could explain the data with a slight loss of goodness of fit. The results showed that MAE optimum conditions were extraction temperature of 60°C and extraction time in the range from 1 to 6 min. The MAE was more efficient than the conventional Heat Reflux Extraction (HRE). Maximal antioxidant potential was observed in E. camaldulensis extracts. Interestingly differences in phenolic composition and antioxidant activity were observed in the extracts obtained by MAE and HRE for all plants used. Quercetin and catechin were found to be the predominant phenolic compounds. The MAE procedure resulted in suitable alternative to obtain bioactive phenolic compounds from semiarid plants due to this technology is higher efficient than conventional methods increasing yield in shorter times.

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Section: Discussionmentioning

confidence: 94%

Section: Ajabsmentioning

confidence: 99%

Section: Mathematical Modelsmentioning

confidence: 99%

Section: Model Fitting For Mae Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Microwave-Assisted Extraction of Phenolic Antioxidants From Semiarid Plants

Wong-Paz

Contreras-Esquivel

Muñiz‐Márquez

et al. 2014

American Journal of Agricultural and Biological Sciences

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“…Extraction yields (circles) are presented in Figure 8.1. The extraction model at different temperatures was based on a two-site kinetic model (Karacabey et al 2013) consisting of two first-order expressions as follows:…”

Section: Nmr)mentioning

confidence: 99%

Composition of mixed culture PHA biopolymers and implications for downstream processing

Montano-Herrera¹

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Polyhydroxyalkanoates (PHAs) are biopolymers synthesised and accumulated by most bacteria for carbon and energy storage. They have properties and applications comparable to petrochemical thermoplastics. Although PHAs are produced at high yields using pure biological cultures, the use of mixed cultures can significantly reduce the production costs and make use of waste streams to produce environmentally sustainable materials. In order to produce mixed culture PHAs of relevance for broader industry applications it is necessary to develop the ability to tailor polymers with diversified mechanical properties through understanding and controlling the monomer composition and compositional distribution.Diverse and complex PHA polymer structures have been achieved in mixed microbial cultures using time-based feeding strategies. However, PHA monomer composition and compositional distribution in PHA random and blocky copolymers are sensitive to substrate feeding history, making more complex the prediction of final PHA content and composition.In this sense, a better understanding of the changing cell physiologies that develop in response to different feeding strategies and substrates is necessary to design optimised feeding strategies and process control algorithms for PHA production.This thesis presents for the first time a comprehensive flux characterisation of monomer development during mixed culture PHA accumulation concurrent with biomass growth using Metabolic Flux Analysis (MFA). A dynamic trend in active biomass growth and in polymer composition was observed and was consistent over replicate accumulations. Monomer (3-hydroxybutyrate and 3-hydroxyvalerate) incorporation into poly(3-hydroxybutyate-co-3-hydroxyvalerate) copolymers in a pilot scale production system was evaluated based on published models that describe polymer production during PHA accumulation. However, it was found that these existing models could not describe the fluctuations in the proportion of Additionally, thermal degradation of mixed culture PHAs during melt processing was assessed by Near-Infrared (NIR) spectroscopy coupled to Multivariate Data Analysis. It was shown that, with correct pretreatment, a copolymeric product that was much more stable to extrusion processing than commercially available PHA was produced.Overall, this thesis explores both the fundamental and applied aspects of PHA production by mixed microbial cultures with concurrent active biomass growth. The use of computational iii tools to explore and help understand the underlying metabolic processes was explored.Polymer composition seems to follow a very complex regulation processes which can be described through the incorporation of more detailed reactions in current metabolic models.Furthermore, this thesis gives further insight into the fundamental properties of the materials produced and an assessment of their potential for degradation during processing.iv

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Effect of soaking time and temperature on water absorption capacity and dimensional changes of bulgur

2021

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Background and objectives Soaking is a processing treatment used in different grain. The objective of the present work is to study the water absorption of bulgur (precooked, dried, and debranned durum wheat), at various temperatures (35, 50, 60 and 65°C) by measuring the moisture content with respect to time. The effect of soaking time and temperature on three dimensions was examined (length: “a (mm)”; crease side width: “b (mm)”; secondary width: “c (mm)”). Weight, volume, sphericity, and density of the precooked, dried, and debranned wheat kernel were also measured. Findings The results indicated higher water absorption capacity at higher temperature. Peleg's model was successfully used to evaluate water absorption during soaking. Peleg's model constants were investigated relative to temperature and confirmed a higher absorption capacity of water. Moreover, during soaking, all the dimensions as well as weight and volume percentages increased with time and temperature. The percent change of secondary width “c” was affected by both temperature and time soaked, indicating that it was the most important parameter controlling the deformation and shape of the kernel. Conclusion Bulgur kernel had higher water absorption due to the absence of the outer bran layer, which acts as a barrier for water absorption. Significance and novetly Modeling the water absorption of bulgur during soaking and measuring its size is important since it help industries to control the soaking operation and further cooking operation and then to optimize industrial process dishes based with bulgur.

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MODELING SOLID–LIQUID EXTRACTION KINETICS OF TRANS‐RESVERATROL AND TRANS‐ε‐VINIFERIN FROM GRAPE CANE

Cited by 59 publications

References 19 publications

Microwave-Assisted Extraction of Phenolic Antioxidants From Semiarid Plants

Microwave-Assisted Extraction of Phenolic Antioxidants From Semiarid Plants

Composition of mixed culture PHA biopolymers and implications for downstream processing

Effect of soaking time and temperature on water absorption capacity and dimensional changes of bulgur

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