The Chemical Structure of Lignin and Quantitative and Qualitative Methods of Analysis in Foodstuffs

Gordon, A. R.

doi:10.1007/978-1-4684-2481-2_3

Cited by 11 publications

(5 citation statements)

References 54 publications

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“…Based on the results of IR spectroscopy, chemical transformations occurring during the process of L modification under various conditions can be tracked. The processes occurring in the solutions during L chemical modification have been studied in sufficient details by various authors [ 14 , 31 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity

et al. 2021

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The article presents the results of the preparation and study of a gel-polymer electrolyte based on lignin obtained from Pinus sylvestris. Sulfonation and subsequent chlorination of lignin make possible implementation of the principle of mono-ionic conductivity in a natural biopolymer matrix, which provides predominantly cationic conductivity of the electrolyte. Based on the results of the qualitative and quantitative analysis of the synthesized samples, the mechanisms of the chemical conversion of the biopolymer, the structure models of the converted fragments of macromolecules, as well as the quantum-chemical calculation of their electronic and geometric parameters are presented. The key electronic characteristics of the gel polymer electrolytes (GPE) based on a composite of lignins with 20 wt.% polyvinyl alcohol are determined by impedance spectroscopy. The maximum value of the specific volume conductivity is 2.48 × 10−4 S cm−1, which is comparable with most commercial electrolytes of this type, but at the same time, record values are reached in the number of lithium cation transfer tLi+ of 0.89. The studies allow to identify the basic laws of the effect of chemical modification on the structure of GPE and describe the mechanism of ionic conductivity.

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Section: Resultsmentioning

confidence: 99%

Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity

et al. 2021

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“…Marlet [36] indicates that storage had no effect on the total or insoluble fibre content of apples but that Klason lignin concentrations were higher in samples stored for 12 months than in those stored for 4 or 8 months. The increase in certain dietary fibre fractions is related to the softening of the apples or to ripening processes causing, for example, softening or an increase in sugars [38]. Differences in the fibre content of stored apples are often due to obtaining data by different analytical methods and also as a result of the analysis of different apple varieties [37,38].…”

Section: Discussionmentioning

confidence: 99%

“…The increase in certain dietary fibre fractions is related to the softening of the apples or to ripening processes causing, for example, softening or an increase in sugars [38]. Differences in the fibre content of stored apples are often due to obtaining data by different analytical methods and also as a result of the analysis of different apple varieties [37,38]. Some of these procedures do not completely remove the simple sugars from the residual fibre.…”

Section: Discussionmentioning

confidence: 99%

“…They protect against the risk of neurodegenerative diseases, reduce asthma symptoms, and are widely used in the prevention of many chronic diseases such as diabetes, hypertension, and cancer. The conditions under which the fruit is stored after harvest affect the maintenance of polyphenol is influenced by varietal characteristics [36], storage conditions that cause the softening of the fruit [38,39], as well as dehydration [40].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Storage Conditions on the Storability and Nutritional Value of New Polish Apples Grown in Central Poland

Kistechok,

Wrona,

Krupa

2023

Agriculture

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The aim of this study is to assess the storability and nutritional value of new Polish apple cultivars recommended for cultivation after storage under low-oxygen atmospheric conditions (ULO and DCA). Fruit characteristics of ‘Chopin’ and clone ‘JB’ were evaluated in relation to commonly grown apple cultivars. Fruits of six selected apple cultivars were stored for a period of 9 months in conventional (0.04% CO2: 21% O2), Ultra-Low Oxygen (1.5% CO2: 1.5% O2), and Dynamic Controlled Atmosphere (0.6% CO2: 0.6% O2) cold storage. Physicochemical characteristics of the apples (firmness, soluble solids, acidity, and fibre content), nutritional and antioxidant values of the fruit (P, K, Ca, Mg, Fe, Cu, Zn, total polyphenols, total flavonoids, and antioxidant capacity), and safety of consumption (residues of pesticides) were assessed. The new cultivar ‘Chopin’ and clone ‘JB’ were characterised by above-average acidity and clone ‘JB’ stood out in terms of antioxidant properties. Storage in a low-oxygen atmosphere in DCA was more effective in limiting fruit ripening than conventional cold storage, contributing to the preservation of the high potential of biologically active compounds in the apples. Apples after 9 months of storage were characterised by higher firmness (from 3.5 to 14 N), higher total polyphenol content in the flesh (from 8 to 23 mg∙100 g−1 FW) and peel (from 32 to 97 mg∙100 g−1 FW), as well as higher antioxidant capacity in the flesh (from 15 to 37 mg AAE∙100 g−1 FW) and peel (from 28 to 59 mg AAE∙100 g−1 FW) when stored in DCA compared to cold storage.

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“…No método klason, plantas mais jovens apresentam maiores digestibilidades de lignina que plantas mais maturas, devido à maior condensação e menor quantidade de unidades de siringil, que apresentam baixa digestibilidade(Gordon, 1977). A lignificação é mais lenta em plantas mais jovens.O tratamento químico, como hidróxido de sódio, também pode aumentar a digestibilidade da lignina, de acordo com MacAnally (1942) citado porBesle et aI.…”

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Local, taxa e extensão da digestão de nutrientes em rações para vacas leiteiras com base em capim elefante (>i<Pennisetum purpureum>/i<, Schum cv cameron) suplementadas com fontes e níveis de energia e proteína

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The Chemical Structure of Lignin and Quantitative and Qualitative Methods of Analysis in Foodstuffs

Cited by 11 publications

References 54 publications

Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity

Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity

Effect of Storage Conditions on the Storability and Nutritional Value of New Polish Apples Grown in Central Poland

Local, taxa e extensão da digestão de nutrientes em rações para vacas leiteiras com base em capim elefante (>i<Pennisetum purpureum>/i<, Schum cv cameron) suplementadas com fontes e níveis de energia e proteína

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