Protein adhesives: Alkaline hydrolysis of different crop proteins as modification for improved wood bonding performance

Averina, Elena; Konnerth, Johannes; D’Amico, Stefano; Herwijnen, Hendrikus W. G. van

doi:10.1016/j.indcrop.2020.113187

Cited by 47 publications

(20 citation statements)

References 62 publications

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“…The method for measuring trypsin inhibitor activity (TIA) has been improved in simplicity, accuracy, and standardization (AOCS, 2021; Kakade et al, 1974; Liu, 2019). Although TIA is the most reliable index for protein quality and subsequent animal performance (Frikha et al, 2012; Hemetsberger et al, 2021; Liu & Ruiz, 2021; McNaughton et al, 1981; Qin et al, 1996), it has been more practical and popular to measure PDI, NSI, UA and/or PS‐KOH for soybeans and other protein products (Averina et al, 2021; Cho & Ryu, 2021; Hemetsberger et al, 2021; Ibáñez et al, 2020; Jia et al, 2021; Parsons, 1996; Ruiz et al, 2020; van Eys & Ruiz, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Protein functional properties include solubility, emulsification, foaming, gelation, and so on (Chmielewska et al, 2021). UA and PS‐KOH are used exclusively in animal nutrition studies with a focus on nutritional quality of a protein product (Batal et al, 2000; Ibáñez et al, 2020; McNaughton et al, 1981), but NSI and PDI are often measured for various applications to indicate nutritional quality and/or functional properties of various protein products (AOCS, 2017a, 2017b; Averina et al, 2021; Cho & Ryu, 2021; Jia et al, 2021; Shen et al, 2021; van Eys & Ruiz, 2021; Wolf et al, 1971).…”

Section: Introductionmentioning

confidence: 99%

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A new method for determining protein solubility index (PSI) based on extraction with 5 mM alkali hydroxide and its correlation with trypsin inhibitor activity in soybean products

Liu

2022

J Americ Oil Chem Soc

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Protein quality affects the nutritional values and functional properties of protein products. For better utilization, it is important to assess protein quality accurately and cost-effectively. For decades, several indirect indices have been relied on, including nitrogen solubility index, protein dispersibility index, urease activity, and protein solubility in 0.2% potassium hydroxide. However, each existing index has limitations or practical difficulties for measurement, while different procedures and terminologies often cause confusion. For rectifying this situation, a new protein quality index, the protein solubility index (PSI), was developed. This required investigation of many factors, including alkali hydroxide type and concentration, solid to solvent ratio, extraction time, magnetic stirring speed, magnetic stirrer type, and centrifugation force and time. For nitrogen analysis, a combustion method was used, where effects of using extracts or residues, sample moisture, sample mass, and the sequence of drying and weighing residues were also investigated. The new PSI method employs 5 mM alkali hydroxide extraction, magnetic stirring, nitrogen analysis of dried residues and small sample size. It allows simultaneous running of multiple samples. Furthermore, the correlations between trypsin inhibitor activity (TIA) and PSI were either strong or very strong (r = 0.747**-0.974**), depending on sample sets. The 5 mM extraction procedure produced a stronger correlation between protein extractability and TIA than the extraction procedure for the TIA assay (10 mM NaOH, 3 h). PSI has a potential to replace most, if not all, of the indirect indices for protein quality of various products, providing a unified index for relevant industries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new method for determining protein solubility index (PSI) based on extraction with 5 mM alkali hydroxide and its correlation with trypsin inhibitor activity in soybean products

Liu

2022

J Americ Oil Chem Soc

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“…Изучение растительных белковых концентратов сои дало понять, что, так как они подвержены щелочному гидролизу, происходит влияние на вязкость, растворимость продукции. Такие модифицированные растительные белки могут быть использованы для повышения эффективности склеивания древесины [14].…”

Section: другие области применения белковых концентратов использование модифицированного соевого белкаunclassified

Белковые Концентраты Сои: Технологии Производства И Перспективы Применения

Бычкова¹,

Борисова²

2021

Ползуновский Вестник

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Аннотация. Соя -один из немногих растительных источников белка, в котором содержится весь необходимый набор аминокислот и витаминов, она является сырьем для получения белковых концентратов: текстуратов, изолятов и гидролизатов. Целью работы является выяснение того, какие исследования осуществляются в ходе создания, освоения и реализации белковых концентратов из масличных культур на примере сои в России и за рубежом, а также проведение анализа публикационной активности и теоретической проработки данной темы за последние годы. Установлено, что основной метод получения соевых белковых текстуратов -экструзионная варка теста, изоляты чаще всего получают экстракцией масла из семян сои, гидролизаты получают путем кислотного гидролиза. Переработка сои наиболее изучена в странах США, Израиля и Японии. Из сои можно выделить большое количество белка, ее выращивание экономически выгодно, не наносит вреда экологии и является безотходным производством. По сравнению с другими странами Россия в настоящее время отстает в количестве проведенных исследований о значении сои как заменителя белка, имеет гораздо меньше ассортимента белковой продукции, в том числе белковых концентратов.

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“…In the second step, soybean protein was added into the emulsion and further adjusted to pH 11 using sodium hydroxide to obtain the eco-friendly wood adhesives. Sodium hydroxide acts as a modifier to unfold the quaternary and/or tertiary structure of soybean protein, and expose its functional groups in the globular structure to outside [ 21 ], because the protein often has polar groups buried inside the globular and nonpolar groups on the outside. Polar groups such as carboxyl, hydroxyl, and amino are the key chemical reaction functional groups for increased cross-linking structure [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

Zhu

Zhang

et al. 2022

Polymers

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Formaldehyde-derived wood adhesives have dominated in woody composites production up to now, while facing a significant challenge in non-renewable raw materials and the formaldehyde emission. To solve these problems, an eco-friendly soybean protein-based wood adhesive was explored via the addition of renewable cardanol based epoxy (CBE) as cross-linking agent. The curing mechanism and viscosity of the adhesives were investigated and the bonding performance was evaluated with three-ply plywood. Fourier transformed infrared spectroscopy (FTIR) analysis confirmed the formation of new ether linkages and the consumption of epoxy groups in the cured adhesives, thereby improving the thermal stabilities and cohesion. Plywood bonded with the CBE-modified soybean protein-based adhesive reached the maximum wet shear strength of 1.11 MPa (4 wt.% CBE addition), a 48% increase compared to the control, whereas the viscosity of adhesive decreased by 68.2%. The wet shear strength of the plywood met the requirements of the Chinese National Standard GB/T 9846-2015 for interior plywood application. The formaldehyde-free adhesive with excellent water resistance adhesiveness performance shows great potential in woody composites as an alternative to formaldehyde derived wood adhesives.

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Protein adhesives: Alkaline hydrolysis of different crop proteins as modification for improved wood bonding performance

Cited by 47 publications

References 62 publications

A new method for determining protein solubility index (PSI) based on extraction with 5 mM alkali hydroxide and its correlation with trypsin inhibitor activity in soybean products

A new method for determining protein solubility index (PSI) based on extraction with 5 mM alkali hydroxide and its correlation with trypsin inhibitor activity in soybean products

Белковые Концентраты Сои: Технологии Производства И Перспективы Применения

An Eco-Friendly Wood Adhesive Consisting of Soybean Protein and Cardanol-Based Epoxy for Wood Based Composites

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