Significant physical attributes affecting quality of Indian black (CTC) tea

Laddi, Amit; Prakash, Neelam Rup; Sharma, Shashi; Mondal, Himanka Sekhar; Kumar, Amod; Kapur, Pawan

doi:10.1016/j.jfoodeng.2012.05.020

Cited by 23 publications

(11 citation statements)

References 8 publications

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“…OPLS biplot is the combination of score and loading plots, displaying X‐variables (metabolites), Y‐variables (group), and the grouping or cluster (observation) in one plot, revealing their correlation . In the OPLS biplot, three circles are visualized at the 0.5, 0.75, and 1.0 coordinates, indicating 50%, 75%, and 100% of the explained variance, respectively, on the X and Y axes with the position of scores and loadings . Metabolites localized in the center of the biplot have a lower effect on group separation than those positioned in the outer sections of the plot .…”

Section: Resultsmentioning

confidence: 99%

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis

Lee

Kim

Chun

et al. 2020

Neurogastroenterology Motil

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Background: Gut microbiota are known to be closely related to irritable bowel syndrome (IBS). However, not much is known about characteristic fecal metabolic profiles of IBS. We aimed to characterize fecal metabolites in patients with IBS with predominant diarrhea (IBS-D) using 1 H-nuclear magnetic resonance ( 1 H-NMR) spectroscopy. Methods:In this study, we enrolled 29 patients diagnosed with IBS-D according to the Rome IV criteria, 22 healthy controls (HC) and 11 HC administered laxatives (HC-L) in the age group of 20-69 year. The usual diet of the patients and HC was maintained, their fecal samples were collected and investigated by NMR-based global metabolic profiling coupled with multivariate statistical analysis. Results:We detected 55 metabolites in 1 H-NMR spectra of fecal samples: four amines, 16 amino acids, six fatty acids, eight organic acids, three sugars, and 18 other compounds. Orthogonal partial least square-discriminant analysis derived score plots showed clear separation between the IBS-D group and the HC and HC-L groups.Among the 55 metabolites identified, we found five disease-relevant potential biomarkers distinguishing the IBS-D from the HC, namely, cadaverine, putrescine, threonine, tryptophan, and phenylalanine. Conclusions:The patients with IBS-D were clearly differentiated from the HC and HC-L by fecal metabolite analysis using 1 H-NMR spectroscopy, and five fecal metabolites characteristic of IBS-D were found. The findings of this study could be used to develop alternative and complementary diagnostic methods and as a source of fundamental information for developing novel therapies for IBS-D.

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Section: Resultsmentioning

confidence: 99%

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis

Lee

Kim

Chun

et al. 2020

Neurogastroenterology Motil

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“…1, the machine vision setup consists of a 3CCD color camera (JAI Manufacturing, Japan) with C-mount vario-focal lens (Kowa Optimed, Inc., USA), adjusted on articulating arm boom stand (Edmund Optics, Singapore), enclosed in an aphotic housing (Laddi et al, 2012). At 25 mm focal length, the working distance of the camera was fixed at 135 mm along with the field of view of 25.5(h) mm Â 19(v) mm.…”

Section: Machine Vision Setupmentioning

confidence: 99%

“…The quality of the tea defines its price. Previous studies mentioned that the taste and aroma were the most significant quality attributes among all (Liang et al, 2005) whereas color attributes were found to be the most significant physical parameters (Laddi et al, 2012). Determination of these parameters involves special sample preparation method in accordance with international standards which is a highly specialized, time consuming and destructive technique in the sense that precious tea samples cannot be reused.…”

Section: Introductionmentioning

confidence: 99%

Classification of tea grains based upon image texture feature analysis under different illumination conditions

Laddi

Sharma

Kumar

et al. 2013

Journal of Food Engineering

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“…Tea is one of the most widely consumed beverages in the world. About 78% of the tea production worldwide is black tea (Gupta et al ., ; Laddi et al ., ). Tea shoots are rich in polyphenolic substances and are responsible for most of the characteristics of processed tea.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of withered leaf moisture during the manufacture of black tea based upon theaflavins fractions

Sabhapondit

Bhattacharyya

Bhuyan

et al. 2013

Int J of Food Sci Tech

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Summary A study was conducted to see the effect of different moisture content of withered leaf on the activity of oxidative enzymes polyphenoloxidase (PPO) and peroxidase (PO) and on the formation of theaflavins (TFs) and thearubigins (TRs). Six commercially popular cultivars TV1, TV7, TV9, TV23, TV26 and T.3E/3 of Assam, India, were processed in four different moisture levels (72%, 70%, 68% and 65%). Significant reduction in PPO and PO enzymes, TFs, TRs and theaflavin digallate equivalent was observed with the decrease in moisture content of withered leaf. The TFs (0.83–5.4 mg g−1) and TRs (23–107 mg g−1) fractions were lowest at moisture level 65 ± 1%. Of the six cultivars studied, better quality of black tea was obtained for cultivar TV1, TV9 and TV23 at 70 ± 1% moisture content, while for TV7 and TV26, it was 68 ± 1%. Withered leaf moisture content should be carefully chosen to obtain the better quality tea from specific cultivar.

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Significant physical attributes affecting quality of Indian black (CTC) tea

Cited by 23 publications

References 8 publications

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis

Classification of tea grains based upon image texture feature analysis under different illumination conditions

Optimisation of withered leaf moisture during the manufacture of black tea based upon theaflavins fractions

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Significant physical attributes affecting quality of Indian black (CTC) tea

Cited by 23 publications

References 8 publications

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using 1H‐NMR coupled with multivariate statistical analysis

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using 1H‐NMR coupled with multivariate statistical analysis

Classification of tea grains based upon image texture feature analysis under different illumination conditions

Optimisation of withered leaf moisture during the manufacture of black tea based upon theaflavins fractions

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Product

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Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis

Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using ¹H‐NMR coupled with multivariate statistical analysis