Morin as a Preservative for Delaying Senescence of Banana

Banana is a climacteric fruit with desirable palatability and high nutritional value. It ripens rapidly accompanied with metabolite changes during postharvest storage. In this work, morin was applied to treat banana to delay senescence. Nuclear magnetic resonance (NMR) spectroscopy was used to monitor the changes of metabolite composition and levels in banana. The results showed that morin significantly delayed the changes of color and firmness. 1D and 2D NMR spectra reflected that the levels and composition of metabolites were changed with the senescence initiation. The principal component analysis revealed that the first principal components responsible for banana senescence were carbohydrates, amino acids, lipids and phenolics. Morin treatment delayed the transformation of starch to glucose, fructose and sucrose, accelerated the accumulations of alanine and γ-Amino-butyrate (GABA), postponed the generations of valine and l-aspartic acid, suppressed the degradation of saponin a. It indicated that morin was effective in delaying banana senescence.

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Assignment of the 1H and 13C spectra of aspidocarpine and assignment of the structure and stereochemistry of the von Braun reaction product of aspidocarpine by 2D nmr spectroscopy

Canadian Journal of Chemistry ◽

10.1139/v87-032 ◽

1987 ◽

Vol 65 (1) ◽

pp. 200-204 ◽

Cited By ~ 17

Author(s):

Stewart McLean ◽

William F. Reynolds ◽

Xingpei Zhu

Keyword(s):

Nmr Spectroscopy ◽

Nmr Spectra ◽

Cyanogen Bromide ◽

2D Nmr ◽

2D Nmr Spectroscopy ◽

2D Nmr Spectra

The 13C and 1H spectra of aspidocarpine and the spectra, structure, and stereochemistry of the product of its von Braun reaction with cyanogen bromide have been totally assigned by a combination of homonuclear (COSY-45) and direct and indirect heteronuclear shift-correlated 2D nmr spectra.

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Assessment of Astaxanthin Accumulation in Hepatocytes of Atlantic Salmon Fed Different Diets Using NMR Spectroscopy

Molecules ◽

10.3390/molecules25081769 ◽

2020 ◽

Vol 25 (8) ◽

pp. 1769

Author(s):

Elena Shumilina ◽

Alessandra Ciampa ◽

Trine Ytrestøyl ◽

Alexander Dikiy

Keyword(s):

Nmr Spectroscopy ◽

Atlantic Salmon ◽

Nmr Spectra ◽

2D Nmr ◽

Fish Feed ◽

Marine Phospholipids ◽

2D Nmr Spectra ◽

Farmed Atlantic Salmon ◽

Short Time ◽

Detection And Quantification

This study aimed to assess the astaxanthin (Ax) accumulation in hepatocytes isolated from farmed Atlantic salmon fed different diets (rich marine, poor, poor with marine phospholipids (MPL) and poor with docosahexaenoic acid (DHA)). Nuclear magnetic resonance (NMR) spectroscopy was used for the Ax detection and quantification. The use of the 13C-enriched Ax allowed the assessment of short-time Ax metabolism. The substitution of fish oil and meal in fish feed on plant analogs and the addition of MPL caused further catabolism and decrease of Ax accumulation in hepatocytes from 17 to about 6 mg/kg or to almost zero in the case of DHA addition. Signals assignment of the native and 13C-enriched astaxanthin in acetone were performed using 1D and 2D NMR spectra.

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Challenges in the decomposition of 2D NMR spectra of mixtures of small molecules

Faraday Discussions ◽

10.1039/c9fd00014c ◽

2019 ◽

Vol 218 ◽

pp. 459-480 ◽

Cited By ~ 1

Author(s):

Afef Cherni ◽

Elena Piersanti ◽

Sandrine Anthoine ◽

Caroline Chaux ◽

Laetitia Shintu ◽

...

Keyword(s):

Nmr Spectroscopy ◽

Small Molecules ◽

Blind Source Separation ◽

Nmr Spectra ◽

Source Separation ◽

2D Nmr ◽

Blind Identification ◽

2D Nmr Spectra

In this paper we present a general approach for the blind identification of compounds from solutions using NMR spectroscopy and blind source separation algorithms.

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Ultrafast 2D 1H-1H NMR spectroscopy of DNP-hyperpolarised substrates for the analysis of mixtures

Chemical Communications ◽

10.1039/d1cc03079e ◽

2021 ◽

Author(s):

Kawarpal Singh ◽

Corentin Jacquemmoz ◽

Patrick Giraudeau ◽

Lucio Frydman ◽

Jean-Nicolas Dumez

Keyword(s):

Nmr Spectroscopy ◽

1H Nmr ◽

1H Nmr Spectroscopy ◽

Nmr Spectra ◽

2D Nmr ◽

Multiple Quantum ◽

Dynamic Nuclear Polarisation ◽

Nuclear Polarisation ◽

2D Nmr Spectra

We show that TOCSY and multiple-quantum (MQ) 2D NMR spectra can be obtained for mixtures of substrates hyperpolarised by dissolution dynamic nuclear polarisation (D-DNP). This is achieved by combining optimised...

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1D and 2D NMR spectra of coffee from 27 countries

10.21203/rs.3.rs-1146879/v1 ◽

2021 ◽

Author(s):

Javier Osorio ◽

Victoria A. Arana ◽

Jessica M. Medina ◽

Rodrigo Alarcon ◽

Edgar Moreno ◽

...

Keyword(s):

Nuclear Magnetic Resonance ◽

Feature Extraction ◽

Magnetic Resonance ◽

Nmr Spectra ◽

2D Nmr ◽

Extraction Methods ◽

Green Coffee ◽

Harvest Time ◽

2D Nmr Spectra ◽

Fully Automatic

Abstract 715 green coffee samples were gathered by Almacafé S.A. (Bogotá, Colombia) between 2012 and 2014 from 27 different countries and analysed at the Nuclear Magnetic Resonance (NMR) laboratory at Universidad del Valle (Cali, Colombia). Over 1000 methanolic coffee extracts were prepared and a total of 4563 spectra were acquired in a fully automatic manner using a 400 MHz NMR spectrometer (Bruker Biospin, Germany). The dataset spans the variance that could be expected for an industrial application of origin monitoring, including samples from different harvest time, collected over several years and processed by at least two distinct operators. The resulting 1D and 2D spectra can be used to develop and evaluate feature extraction methods, multivariate algorithms and automation monitoring techniques, as a dataset for teaching, or as a reference for new studies on similar samples and approach.

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Effect of Different Drying Methods on the Nutritional Value of Hibiscus sabdariffa Calyces as Revealed by NMR Metabolomics

Molecules ◽

10.3390/molecules26061675 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1675

Author(s):

Sengnolotha Marak ◽

Elena Shumilina ◽

Nutan Kaushik ◽

Eva Falch ◽

Alexander Dikiy

Keyword(s):

Nutritional Value ◽

2D Nmr ◽

Proximate Analysis ◽

Ash Content ◽

Drying Methods ◽

Hibiscus Sabdariffa ◽

Nmr Metabolomics ◽

Polar Metabolites ◽

2D Nmr Spectra ◽

Plant Processing

Red mature calyces of Hibiscus sabdariffa were collected from 16 different locations in Meghalaya, India. Samples were processed using shade drying (SD) and tray drying (TD). NMR spectroscopy was used to assess the metabolic composition of the calyces. In this study, 18 polar metabolites were assigned using 1D and 2D NMR spectra, and 10 of them were quantified. Proximate analysis showed that the TD method is more efficient at reducing moisture and maintaining the ash content of the Hibiscus biomass. NMR metabolomics indicates that the metabolite composition significantly differs between SD and TD samples and is more stable in TD plant processing. The differences in post-harvest drying has a greater impact on the metabolite composition of Hibiscus than the plant location.

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