Extraction Optimization of Green Tea Beverage (Noon Chai) for Yield, Polyphenols and Caffeine Using Response Surface Methodology

Parvez, Sadaf; Wani, Idrees Ahmed; Masoodi, F. A.

doi:10.1007/s13369-021-05918-8

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…A known amount of oven and freeze-dried beads were dissolved in a sodium citrate solution (2% w/v) and continuously stirred at ambient temperature, and supernatant was taken for further analysis. The content of polyphenols loaded was assessed using Folin–Ciocalteu’s assay (FC), which was slightly modified from a previous work . Blank beads without encapsulated GTE were also assessed for total phenolic content using the FC assay to remove the intervention from coating to calculate the exact GTE content packed in the produced beads.…”

Section: Methodsmentioning

confidence: 99%

“…The content of polyphenols loaded was assessed using Folin−Ciocalteu's assay (FC), which was slightly modified from a previous work. 24 Blank beads without encapsulated GTE were also assessed for total phenolic content using the FC assay to remove the intervention from coating to calculate the exact GTE content packed in the produced beads. The encapsulation efficiency was calculated by A field emission scanning electron microscope (FE-SEM) was used to examine the surface morphology of beads (Gemini SEM 500, ZEISS).…”

Section: Colorimetric Analysismentioning

confidence: 99%

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Calcium Alginate Beads Loaded with Green Tea Extract: Impact of Drying Methods on Its Structure, Release Behavior, and Storage Stability

Parvez,

Wani

2024

ACS Food Sci. Technol.

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In this study, calcium alginate beads containing green tea extract were formulated by using oven and freeze-drying methods. Using calcium alginate as a carrier and guar gum as a filler ingredient, the beads were prepared through an ionotropic gelation process. The internal texture of oven-dried beads (ODBs) was more homogeneous and compact than that of the freezedried beads (FDBs). Based on texture analysis, the ODBs were harder because their internal structure was more rigid. The FDB showed a greater efficiency of encapsulation (74.98%) than that of the ODB (58.04%). Under alkaline conditions, oven-and freezedried beads exhibited higher swelling and release rates than under acidic conditions. It was found that FDB released more polyphenols and had a higher metal chelation activity (85.81%) and radical scavenging power (78.33%) than that of oven-dried beads. Both systems were well-fitted by semiempirical models. In addition, both the ODB and FDB showed a 3-fold increase in bioactivity during storage at room temperature (27 ± 2 °C).

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Section: Methodsmentioning

confidence: 99%

Section: Colorimetric Analysismentioning

confidence: 99%

Calcium Alginate Beads Loaded with Green Tea Extract: Impact of Drying Methods on Its Structure, Release Behavior, and Storage Stability

Parvez,

Wani

2024

ACS Food Sci. Technol.

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“…Tea (Camellia sinensis) is the globally most effective non-alcoholic beverage for its' bene cial effects in human health (Bai et al, 2021) as well as adding GDP in many countries (Fu et al, 2015). The extracts of green pertained from Camellia sinensis species under Theaceae family bearing several kinds of secondary metabolites, for example, catechins, anthocyanin (Liao et al, 2021), caffeine (Parvez et al, 2021), Gallic acids (Jovanovic et al, 2021), etc. Flavan 3-ols, namely catechins, is also known as the principal element of polyphenols in the young shoot of tea plants (Guo et al, 2017) with high anti-oxidant and reduced the high level of blood glucose, various kinds of renal function, hepatic and lipid parameters in animals (Nazir et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Responses of Secondary Metabolites and Transcriptomes in Tea Cultivar ‘Zhong Ming 6’ (Camellia Sinensis) under Blue Light and Red Light Journal Name: Plant Growth Regulation

Aktar

Zhang

Peng

et al. 2022

Preprint

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Light is one of the most prestigious environmental sign, which stimulates plant metabolite consequences. Zhong Ming 6 (ZM6) is a green tea (Camellia sinensis) cultivar with highly accumulating TGGP. Here, three kinds of supplemental light wavelengths including blue light (BL,200 µmol m−2 s−1), red light(RL,200 µmol m−2 s−1), and White Light (WL/CK, 200 µmol m−2 s−1) were applied to explore their effects on the transcriptomes and metabolomics of young shoots (one bud and two leaves) in tea plants. Interestingly, artificial BL and RL significantly affect the secondary metabolites and transcriptome factors of tea plants. Here, BL extensively dominated the multiple physiological actions with secondary metabolism. In addition, RL could induce plant growth, development, and photosynthesis. Thoroughly, the identification of eight structural genes and 34 transcription factors (TFs) signiଁcantly correlated with total catechin (TC) and anthocyanin. Due to the upregulations of the CsGSTF1 gene in the flavonoid biosynthesis pathway, anthocyanin production was maximum under BL. Then, CsMYB75, bHLH-MYC, and other R2R3-MYBs were highly upregulated in BL to increase the accumulation of TC and anthocyanins in tea plants. Again, the CsMYB4 gene was highly significant and positively correlated with TC and anthocyanin accumulation under RL. We indicated that BL is more feasible due to the number of functional metabolites (gallic acid, caffeine, TC, TGGP (1, 2, 6-tri-O-galloyl-β-D-glucopyranose), and anthocyanin) being supreme. For taste, quality, and dynamic indigenous mechanism of the tea plant, RL is also suitable that increase Chlorophyll content and tea yield.

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“…The second-order polynomial equation is employed for optimisation as follows (Eq. 1) (Parvez et al, 2022):…”

Section: Introductionmentioning

confidence: 99%

Green extraction of bioactive compounds from Azadirachta indica in aqueous glycerol and modelling and optimisation by response surface methodology

Anis

Ahmed

Anis

2022

Folia Horticulturae

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Development of efficient and green methods for extracting bioactive phytochemicals has great industrial value. Increasing environmental sensitivity at the global level has tremendously enhanced the demand for such methods. Azadirachta indica is a well-known medicinal tree. As glycerol has emerged as a green and safe extraction solvent for bioactive phytochemicals, this study aimed to investigate the efficacy of a glycerol–water solvent system to extract bioactive compounds from A. indica leaves. Modelling and optimisation were carried out by using response surface methodology (RSM) as per the Box–Behnken design with three variables, namely, solvent concentration, time and temperature. The responses were total phenolic content (TPC), total flavonoid content (TFC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and metal chelating activity (MCA). The optimum conditions found by numerical optimisation were a solvent concentration of 69.713%, a time period of 38.328 min and a temperature of 32.114 °C with the predicted values of TPC, TFC, %DPPH and %MCA as 5.27 mg gallic acid equivalents · g−1 DW (dry weight), 9.869 mg rutin equivalents · g−1 DW, 73.8% and 54.366%, respectively. The validation experiments showed almost the same results for each response with very low% errors (5.431–7.661). Increasing glycerol concentration in the extracting medium favoured the extraction of TPC, TFC and antioxidant phytochemicals, but for MCA, the trend was the opposite. In conclusion, 70% aqueous glycerol is an effective medium for the extraction of polyphenolic and antioxidant phytochemicals from A. indica leaves. Extraction models suggested by RSM have high prospects to be used on a large industrial scale.

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Extraction Optimization of Green Tea Beverage (Noon Chai) for Yield, Polyphenols and Caffeine Using Response Surface Methodology

Cited by 6 publications

References 37 publications

Calcium Alginate Beads Loaded with Green Tea Extract: Impact of Drying Methods on Its Structure, Release Behavior, and Storage Stability

Calcium Alginate Beads Loaded with Green Tea Extract: Impact of Drying Methods on Its Structure, Release Behavior, and Storage Stability

Responses of Secondary Metabolites and Transcriptomes in Tea Cultivar ‘Zhong Ming 6’ (Camellia Sinensis) under Blue Light and Red Light Journal Name: Plant Growth Regulation

Green extraction of bioactive compounds from Azadirachta indica in aqueous glycerol and modelling and optimisation by response surface methodology

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