Characterization of tea and tea infusion: A study of marketed black tea samples from some tea growing regions of India

Das, Ayush Kumar; Ghosh, Arindam; Majumder, Soumya; Saha, Sumedha; Acharyya, Sukanya; Sarkar, Sahadeb; Chakraborty, Sourav; Mukherjee, Mainak; Bhattacharya, Malay

doi:10.22271/phyto.2020.v9.i5v.12553

Cited by 11 publications

(32 citation statements)

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“…Qualitative analysis for the detection of bioactive compounds, i.e., tannin, coumarin, cardiac glycosides, steroid, flavonoids and terpenoids was done by following the protocol of Das et al 2020 and Majumder et al 2021 [7,8] .…”

Section: Qualitative Analysismentioning

confidence: 99%

In vitro assessment of the antioxidant and antibacterial activities of some shade tree barks from tea plantation of Terai region of West Bengal

Ghosh¹,

Saha²,

Majumder³

et al. 2023

J Pharmacogn Phytochem

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The aim of this research was to evaluate the antioxidant and antibacterial activities of six shade tree barks. Barks of six plants were subjected to formulate the extracts with nine different nonpolar and polar solvents like hexane, chloroform, ethanol, methanol etc. The six bark extracts were assessed for their free radical scavenging and antibacterial potentialities by employing the DPPH scavenging assay and well diffusion methods, respectively. All the extracts were found to be more or less exhibited DPPH scavenging activity but methanolic extracts of Senna siamea; Derris robusta; Leucaena leucocephala were having the highest scavenging abilities. All the plants showed low to high antibacterial ability against Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Klebsiella pneumoniae where chloroform and aqueous extracts as well as all the extracts of Melia azedarach had no effect at all. So, this present study accomplish that the bark extracts of these shade trees could be exploited to develop the natural bioactive agents although further research are needed.

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Section: Qualitative Analysismentioning

confidence: 99%

In vitro assessment of the antioxidant and antibacterial activities of some shade tree barks from tea plantation of Terai region of West Bengal

Ghosh¹,

Saha²,

Majumder³

et al. 2023

J Pharmacogn Phytochem

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“…Qualitative tests were conducted on all samples i.e., CJPD, CJPW and CW to determine the presence of different groups of molecules such as phenols, flavonoids, coumarin, protein, starch, glycosides, glycerin, terpenoids, steroids (Das et al 2020;Labar et al 2019;) and alkaloid (https:// www. biolo gydis cussi on.…”

Section: Qualitative Biochemical Testsmentioning

confidence: 99%

Brewing and biochemical characterization of Camellia japonica petal wine with comprehensive discussion on metabolomics

Majumder

Ghosh

Chakraborty

et al. 2022

Food Prod Process and Nutr

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A novel wine has been developed from Camellia japonica’s petal by fermenting the decoction with Saccharomyces cerevisiae or brewer’s yeast. pH, brix, specific gravity and alcohol percentage were tested to study the physicochemical properties of the wine. Qualitative tests indicated presence of phenols such as flavonoids, coumarins; protein; glycosides; glycerin; terpenoids; steroids; and fatty acids in the wine. Total phenol content was found high in the decoction and in its fermented form as well. In vitro biological activities such as antioxidant activity, antidiabetic activity and lipid peroxidation inhibition power were assessed in samples. Furthermore, GC-MS analysis helped to detect volatiles present in the unfermented decoction and understand the effect of fermentation on its changing metabolome while column chromatography assisted the separation of solvent-based fractions. Notable outcomes from this study were detection of bioactive compound quinic acid in the decoction and a proposed pathway of its metabolic breakdown after fermentation. Results of this research revealed biochemical and physicochemical acceptability of this wine prepared from an underutilized flower. Graphical Abstract

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“…Certainly, results of this research have shown effect tea waste on soil nutrient profile. Naturally, tea is found to be acidic (Das et al, 2020) due to presence of various organic acids and phenolics, which can be a reason behind the low pH of TWS. Moreover composting, especially food waste composting obviously lowers the pH of soil, which indicates an increased soil fertility (Sundberg et al, 2013).…”

Section: Possible Metabolic Breakdown Of Xanthosine and Caffeine In Twsmentioning

confidence: 99%

Metabolomic exploration of CTC tea manufacturing waste validates its potentiality as organic fertilizer

Sarkar

Majumder

Ghosh

et al. 2022

Turkish Journal of Food and Agriculture Sciences

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Valorization of agro-industrial waste resources is today’s main topic for the agribiotechnology researchers. This research work was designed to valorise tea industrial waste, i.e., manufactured by-products from CTC (crush-tear-curl) tea factory. Physicochemical analysis has been carried out to characterize tea waste treated soil. Pot experiment was considered to study impact of tea waste on plant growth. Morphological parameters such as length of plants and pods, and girth diameter were considered for growth study. Effect of tea factory waste on soil nutrition was found remarkable with increased organic carbon, organic matter, nitrogen, phosphorus, potassium, and sulphur content. Pot culture revealed impact of tea waste composted soil on boosted plant growth. GC-MS based metabolite profiling revealed xanthosine and caffeine as major compounds in tea waste extract. A possible pathway has been proposed to explain the role of xanthosine and caffeine breakdown in fertilization of soil and plant growth. Disposal of tea wastes produced during tea manufacturing can be managed in a sustainable manner if this research is implemented industrially. This research portrays a notable nutrient richness in tea waste treated soil. Detection of purine metabolites revealed remarkable fertilizing and plant growth promoting properties of CTC tea waste.

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Characterization of tea and tea infusion: A study of marketed black tea samples from some tea growing regions of India

Cited by 11 publications

References 0 publications

In vitro assessment of the antioxidant and antibacterial activities of some shade tree barks from tea plantation of Terai region of West Bengal

In vitro assessment of the antioxidant and antibacterial activities of some shade tree barks from tea plantation of Terai region of West Bengal

Brewing and biochemical characterization of Camellia japonica petal wine with comprehensive discussion on metabolomics

Metabolomic exploration of CTC tea manufacturing waste validates its potentiality as organic fertilizer

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