NMR Molecular Dynamic and Thermal Analysis Studies of Amescla Resin

Silva, Emerson O.; Tavares, Maria Inês B.; Nogueira, José S.

doi:10.1080/00914030701283113

Cited by 3 publications

(1 citation statement)

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“…It is known that nuclear magnetic resonance is very much used to characterize a chemical structure and a molecular dynamic of samples [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. This spectroscopy has many techniques, which differ in pulse sequence that permits us to evaluate both chemical constituents and molecular dynamic, because NMR analyzes the sample in different physical states [2][3][4][10][11][12][13][14][15]. According to the context, this work has a purpose to map the principal components that are responsible for the pharmacological and toxic effects and determine the stability degree of this latex after being kept at environment conditions.…”

Section: Introductionmentioning

confidence: 99%

The NMR Study of the Latex Extracted from Brosimum Parinarioides

Miguez¹,

Tavares

2011

ChChT

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In this work we used high-resolution nuclear magnetic resonance (NMR) to identify the major compounds present in the Natural latex named Leite de Amapá, which is extracted from Brosimum paranarioides tree. To do it 1D 1 H and 13 C NMR spectra and DEPT techniques were employed. The analysis of spectral data showed that this latex is principally constituted by cisisoprene, saturated and unsaturated fatty acids and triacylglycerides esters.

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Section: Introductionmentioning

confidence: 99%

The NMR Study of the Latex Extracted from Brosimum Parinarioides

Miguez¹,

Tavares

2011

ChChT

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The Use of Low‐Field Solid‐State NMR Relaxation to Study the Latex Extracted from Brosimum Parinarioides

Miguez

Tavares

Spinola

2011

Macromolecular Symposia

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Summary: The stability of the natural latex called Leite de Amapá, extracted from the Brosimum paranarioides tree, which is used as food and in popular medicine in Amazônia, was analyzed during an interval of twelve months. The molecular stability was monitored by proton spin-lattice (T 1 H) and spin-spin (T 2 H) relaxation times, which were measured with help of low-field nuclear magnetic resonance (NMR) with 1 H frequency at 23 MHz. According to the T 2 H measurements, the latex degrades continuously and significant differences can be observed after 6 months of storage at ambient conditions, when no sort of chemical of physical treatment is employed.

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