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1. Characterization of the improved functionality in soybean protein-proanthocyanidins conjugates prepared by the alkali treatment

Author:
Xiaowen Pi; Yuxue Sun; Jiafei Liu; Xu Wang; Weichen Hong; Jianjun Cheng; Mingruo Guo
Source:
Food hydrocolloids 2023 v.134 pp. 108107
ISSN:
0268-005X
Subject:
alkali treatment,   etc   ; allergens; antioxidant activity; chemical structure; enzyme-linked immunosorbent assay; epitopes; hydrocolloids; hydrophobicity; liquid chromatography; peptides; polyacrylamide gel electrophoresis; polyphenols; protein composition; soybeans;     Show all 14 Subjects
Abstract:
... This study investigated the changes in functionality, structure, and protein composition in soybean protein-proanthocyanidins (SPI-PC) conjugates prepared by the alkali method with dose-ranging PC molecular grafting (0.5, 1, 2 mg/mL). Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) demonstrated that more >180 kDa polymers were formed in SPI-PC conjugates with the increase of P ...
DOI:
10.1016/j.foodhyd.2022.108107

2. Characterization of whey protein isolate-(−)-epigallocatechin-3-gallate conjugates prepared by non-enzymatic and enzymatic methods and their application in stabilizing β-carotene emulsion

Author:
Weijun Chen; Jiayu Zhu; Wenjun Wang; Dayu Liu; Yin Zhang; Yuncheng Li; Fanbing Meng; Wei Zhang; Donghong Liu
Source:
Food chemistry 2023 v.399 pp. 133727
ISSN:
0308-8146
Subject:
alkali treatment,   etc   ; Fourier transform infrared spectroscopy; antioxidant activity; antioxidants; crosslinking; emulsions; encapsulation; enzymes; epigallocatechin gallate; fluorescence; food chemistry; free radicals; oxidation; polyacrylamide gel electrophoresis; whey protein isolate;     Show all 15 Subjects
Abstract:
... (−)-Epigallocatechin-3-gallate (EGCG) was conjugated to whey protein isolate (WPI) using alkaline treatment, free radical grafting and tyrosinase-catalyzed oxidation. The structure and properties of the obtained conjugates and their application as antioxidant emulsifiers in stabilizing β-carotene emulsion were systematically characterized. Fourier transform infrared spectroscopy and sodium dodecyl ...
DOI:
10.1016/j.foodchem.2022.133727

3. Effects of Alkalization on Physical and Mechanical Properties of Biologically Degummed Okra Bast and Corn Husk Fibers

Author:
G. M. Arifuzzaman Khan; Nazire Deniz Yilmaz; Kenan Yilmaz
Source:
Journal of natural fibers 2022 v.19 no.3 pp. 1126-1136
ISSN:
1544-046X
Subject:
alkali treatment,   etc   ; alkalinization; corn husks; okra;     Show all 4 Subjects
Abstract:
... In this study, biologically degummed okra bast and corn husk fibers were subjected to alkalization processes. Alkalization treatments resulted in decrease of linear density of the biologically degummed fibers. Increment in alkali concentration resulted in an initial increase then a successive decrease in all tensile indicators: initial modulus, breaking tenacity and breaking elongation. 3 g/L NaOH ...
DOI:
10.1080/15440478.2020.1798840

4. Characterization of agar extracted from Gracilaria species collected along Tanzanian coast

Author:
Said A.H. Vuai
Source:
Heliyon 2022 v.8 no.2 pp. e09002
ISSN:
2405-8440
Subject:
alkali treatment,   etc   ; agar; coasts; gel strength; Zanzibar;     Show all 5 Subjects
Abstract:
... The study was conducted to investigate the effect of spatial variation, alkali treatment and the volume of extractant on yield and gel strength of agar for three Gracilaria species (G. salicornia, G. edulis and G. corticata) collected from the Tanzanian coast (Dar es Salaam, Tanga and Zanzibar). Treated and untreated G. corticata showed the highest yield (27 ± 0.7 % and 26.2 ± 1.3 % for treated an ...
DOI:
10.1016/j.heliyon.2022.e09002

5. Mechanical Characteristics Study of Chemically Modified Kenaf Fiber Reinforced Epoxy Composites

Author:
Sathish Kumar R; Nivedhitha Durgam Muralidharan
Source:
Journal of natural fibers 2022 v.19 no.7 pp. 2457-2467
ISSN:
1544-046X
Subject:
alkali treatment,   etc   ; epoxides; fiber content; impact strength; kenaf;     Show all 5 Subjects
Abstract:
... An experimental investigation was conducted to identify the optimum fiber content and the effect of fiber alkaline treatment on kenaf fiber reinforced epoxy composites and reported in this article. The entire research work was carried out in two phases. In first phase, kenaf fiber reinforced epoxy composites with fiber weight fractions 20%, 30%, 40%, and 50% (on the total weight of composites) of ...
DOI:
10.1080/15440478.2020.1818350

6. Enzymatic production of xylooligosaccharides from corn cobs: Assessment of two different pretreatment strategies

Author:
Caio Cesar de Mello Capetti; Vanessa de Oliveira Arnoldi Pellegrini; Melissa Cristina do Espirito Santo; Anelyse Abreu Cortez; Maurício Falvo; Antonio Aprigio da Silva Curvelo; Eleonora Campos; Jefferson Gonçalves Filgueiras; Francisco Eduardo Gontijo Guimaraes; Eduardo Ribeiro de Azevedo; Igor Polikarpov
Source:
Carbohydrate polymers 2022 pp. 120174
ISSN:
0144-8617
Subject:
alkali treatment,   etc   ; biomass; chemical composition; corn; xylan; xylooligosaccharides;     Show all 6 Subjects
Abstract:
... Corn cobs (CCs) are abundant xylan-rich agricultural wastes. Here, we compared CCs XOS yields obtained via two different pretreatment routs, alkali and hydrothermal, using a set of recombinant endo- and exo-acting enzymes from GH10 and GH11 families, which have different restrictions for xylan substitutions. Furthermore, impacts of the pretreatments on chemical composition and physical structure o ...
DOI:
10.1016/j.carbpol.2022.120174

7. Efficient extraction of critical elements from end-of-life automotive catalytic converters via alkaline pretreatment followed by leaching with a complexing agent

Author:
Nazanin Bahaloo-Horeh; Seyyed Mohammad Mousavi
Source:
Journal of cleaner production 2022 v.344 pp. 131064
ISSN:
0959-6526
Subject:
alkali treatment,   etc   ; oxalic acid; platinum; pulp; temperature; wastes;     Show all 6 Subjects
Abstract:
... Spent automotive catalytic converters are one of the fastest-growing waste streams that could be considered as a potential industrially demanded source of platinum group metals (PGMs), rare earth metals (REEs), and other critical elements. In this research, an integrated recycling approach was proposed based on the characteristics of the waste and its refractory nature. The proposed process focuse ...
DOI:
10.1016/j.jclepro.2022.131064

8. A universal synthesis of MOF-Hydroxyl for highly active oxygen evolution

Author:
Wenjing Dai; Junshuang Zhou; Ying Bian; Zhuoran Hao; Yunpeng Cao; Jiajia Xiao; Huiyang Gou; Faming Gao
Source:
Journal of colloid and interface science 2022 v.623 pp. 318-326
ISSN:
0021-9797
Subject:
alkali treatment,   etc   ; electron microscopy; oxidation; oxygen production; porous media;     Show all 5 Subjects
Abstract:
... Since of their adjustable pore structure and variety of metal sites, MOFs materials have infinite possibilities, but their low intrinsic activity hinders them from being employed in electrolytic water. The sulfurization and oxidation of MOFs has proven to be a feasible technique for producing highly active catalytic materials. Here, the MOFs are completely converted to hydroxide by treatment with ...
DOI:
10.1016/j.jcis.2022.05.051

9. Alkali Treatment Effect on Physicochemical and Tensile Properties of Date Palm Rachis Fibers

Author:
Abderrezak Bezazi; Haithem Boumediri; Gilberto Garcia del Pino; Boudjema Bezzazi; Fabrizio Scarpa; Paulo N.B. Reis; Alain Dufresne
Source:
Journal of natural fibers 2022 v.19 no.10 pp. 3770-3787
ISSN:
1544-046X
Subject:
alkali treatment,   etc   ; Phoenix dactylifera; experimental design; tensile strength; trees; Algeria;     Show all 6 Subjects
Abstract:
... This work aims to optimize the physicochemical and tensile properties of vascular fibers extracted from a local date palm rachis in Algeria. This fiber has a very specific composition and architecture and is different from the remaining fibers obtained from the six possible parts of the tree. For this purpose, a Taguchi orthogonal array design L16 was applied to reduce the number of experiments. T ...
DOI:
10.1080/15440478.2020.1848726

10. Effect of Fiber Pre-treatment Methods on Hygrothermal Aging Behavior of Agave Fiber Reinforced Polymer Composites

Author:
Ishita Kamboj; Rajat Jain; Deepak Jain; Tarun Kumar Bera
Source:
Journal of natural fibers 2022 v.19 no.8 pp. 2929-2942
ISSN:
1544-046X
Subject:
alkali treatment,   etc   ; Agave; direct contact; durability; humidity; moisture diffusivity; polymers;     Show all 7 Subjects
Abstract:
... Three different pre-treatment methods, that is, alkali hornification, water hornification, and alkali treatment, are evaluated for the improvement in durability of agave natural fiber-reinforced polymer composites under the hygrothermal aging conditions. The composite specimens were prepared following the standard test procedures laid for moisture diffusion analysis. To analyze the effect of diffe ...
DOI:
10.1080/15440478.2020.1838398

11. The spatial orientation and interaction of cell wall polymers in bamboo revealed with a combination of imaging polarized FTIR and directional chemical removal

Author:
Jiawei Zhu; Wenting Ren; Fei Guo; Hankun Wang; Yan Yu
Source:
Cellulose 2022 v.29 no.6 pp. 3163-3176
ISSN:
0969-0239
Subject:
alkali treatment,   etc   ; bamboos; biorefining; cell walls; cellulose; lignin; lignocellulose; xylan;     Show all 8 Subjects
Abstract:
... The mechanical and physical properties of lignocellulosic materials are closely related to the orientation and interaction of the polymers within cell walls. In this work, Imaging Polarized FTIR, combined with directional chemical removal, was applied to characterize the spatial orientation and interaction of cell wall polymers in bamboo fibers and parenchyma cells from two bamboo species. The res ...
DOI:
10.1007/s10570-022-04506-9

12. An integrated ICP-MS-based analytical approach to fractionate and characterize ionic and nanoparticulate Ce species

Author:
Yingyan Huang; Judy Tsz-Shan Lum; Kelvin Sze-Yin Leung
Source:
Analytical and bioanalytical chemistry 2022 v.414 no.11 pp. 3397-3410
ISSN:
1618-2642
Subject:
alkali treatment,   etc   ; analytical chemistry; bioaccumulation; biotransformation; ceric oxide; human health; ultrafiltration;     Show all 7 Subjects
Abstract:
... Cerium dioxide nanoparticles (CeO₂ NPs) are widely used in various fields, leading to concern about their effect on human health. When conducting in vivo investigations of CeO₂ NPs, the challenge is to fractionate ionic Ce and CeO₂ NPs and to characterize CeO₂ NPs without changing their properties/state. To meet this challenge, we developed an integrated inductively coupled plasma-mass spectrometr ...
DOI:
10.1007/s00216-022-03958-z

13. Facile preparation of CuMOF-modified multifunctional nanofiber membrane for high-efficient filtration/separation in complex environments

Author:
Huizhi Wu; Zunpeng Hu; Qian Geng; Zihao Chen; Yuqian Song; Jiaqi Chu; Xin Ning; Senjie Dong; Ding Yuan
Source:
Colloids and surfaces 2022 v.651 pp. 129656
ISSN:
0927-7757
Subject:
alkali treatment,   etc   ; coordination polymers; filtration; hydrophobicity; lipophilicity; nanofibers; oils; particulates; temperature; wettability;     Show all 10 Subjects
Abstract:
... In this study, a multifunctional polyetherimide (PEI) nanofiber membrane decorated by Cu-based metal-organic framework (CuMOF) was proposed for high-efficient filtration/separation in complex environments. In the presence of CuMOF, the hybrid nanofiber membrane exhibited effective antibacterial ability, lotus leaf-like self-cleaning function, and enhanced particulate matter (PM) capture capacity. ...
DOI:
10.1016/j.colsurfa.2022.129656

14. High-efficiency separation of hemicellulose from bamboo by one-step freeze–thaw-assisted alkali treatment

Author:
Fanyan Zeng; Shanshan Wang; Jiarui Liang; Liming Cao; Xiaoxu Liu; Chengrong Qin; Chen Liang; Chuanling Si; Zebin Yu; Shuangquan Yao
Source:
Bioresource technology 2022 v.361 pp. 127735
ISSN:
0960-8524
Subject:
alkali treatment,   etc   ; arabinose; bamboos; cellulose; chemical structure; hemicellulose; lignin; solubility; temperature; xylose;     Show all 10 Subjects
Abstract:
... The selectivity of alkali treatment (AT) for hemicellulose separation is reduced due to the alkali solubility of lignin. It was improved using freeze–thaw-assisted alkaline treatment (FT/AT). In this study, bamboo hemicellulose was separated via a one-step freeze–thaw-assisted alkali treatment (OFT/AT). The effects of freezing temperature, freezing time, alkali concentration, and treatment time on ...
DOI:
10.1016/j.biortech.2022.127735

15. Response of anaerobic digestion of waste activated sludge to types of alkalis: Contribution identification of metal ions

Author:
Cong-Cong Tang; Xing-Ye Yao; Zheng-Shuo Zou; Ai-Juan Zhou; Wenzong Liu; Yong-Xiang Ren; Zhi-Hua Li; Aijie Wang; Zhang-Wei He
Source:
Bioresource technology 2022 v.363 pp. 127895
ISSN:
0960-8524
Subject:
alkali treatment,   etc   ; acidification; activated sludge; anaerobic digestion; calcium; hydrolysis; methane production; solubilization;     Show all 8 Subjects
Abstract:
... Alkaline pretreatment is one promising strategy for promoting anaerobic digestion of waste activated sludge (WAS). This study selected three types of alkalis with monovalent (NaOH and KOH), divalent (Ca(OH)₂ and Mg(OH)₂), and trivalent (Fe(OH)₃ and Al(OH)₃) cations to reveal the roles of metal ions on short chain fatty acids (SCFAs) production. The enhanced production potentials of SCFAs were redu ...
DOI:
10.1016/j.biortech.2022.127895

16. Extraction and Characterization of Corn Leaf Fiber

Author:
Garima Singh; Seiko Jose; Devinder Kaur; Bhawna Soun
Source:
Journal of natural fibers 2022 v.19 no.5 pp. 1581-1591
ISSN:
1544-046X
Subject:
alkali treatment,   etc   ; chemical composition; corn; fabrics; infrared spectroscopy; leaves; lignin; plant fibers;     Show all 8 Subjects
Abstract:
... Corn leaves were collected after harvesting corn and the fibers were extracted by water retting. The fibers were subjected to alkali treatment in order to enhance the mechanical as well as handle properties. The physico-mechanical properties of the retted and alkali-treated corn leaf fibers were analyzed using various analytical and statistical methods. The change in chemical composition due to al ...
DOI:
10.1080/15440478.2020.1787914

17. Optimizing the alkali treatment of cellulosic Himalayan nettle fibre for reinforcement in polymer composites

Author:
Manash Protim Mudoi; Shishir Sinha; Vijay Parthasarthy
Source:
Carbohydrate polymers 2022 v.296 pp. 119937
ISSN:
0144-8617
Subject:
alkali treatment,   etc   ; activation energy; crystal structure; hemicellulose; lignin; roughness; temperature; tensile strength;     Show all 8 Subjects
Abstract:
... The Himalayan nettle plant can yield strong and long bast fibre. In this study, the extracted fibres were treated with 3, 5, 7, and 10 wt% alkali solution and characterised the raw and treated fibres for chemical, morphological, physical, mechanical, and thermal properties. The objective is to find the optimized alkali concentration for fibre surface treatment to use as reinforcement in polymer co ...
DOI:
10.1016/j.carbpol.2022.119937

18. Comparison of alkali and ionic liquid pretreatment methods on the biochemical methane potential of date palm waste biomass

Author:
Ikram Mehrez; K. Chandrasekhar; Woojoong Kim; Sang-Hyoun Kim; Gopalakrishnan Kumar
Source:
Bioresource technology 2022 v.360 pp. 127505
ISSN:
0960-8524
Subject:
alkali treatment,   etc   ; Phoenix dactylifera; agricultural wastes; biogas; biomass; fruits; ionic liquids; methane; spathes;     Show all 9 Subjects
Abstract:
... Date palm waste biomass is a readily accessible agricultural waste biomass that may be used to produce biogas. Because the complex structure of date palm waste biomass prevents the embedded holo-cellulosic sugars from biodegrading, pretreatment is required to increase methane (CH₄) yield. The present investigation aimed to comparatively determine the impact of alkali and ionic liquid pretreatment ...
DOI:
10.1016/j.biortech.2022.127505

19. Conditions for efficient alkaline storage of cover crops for biomethane production

Author:
C. Van Vlierberghe; R. Escudié; N. Bernet; G. Santa-Catalina; S. Frederic; H. Carrere
Source:
Bioresource technology 2022 v.348 pp. 126722
ISSN:
0960-8524
Subject:
alkali treatment,   etc   ; Helianthus annuus; biogas; butyric acid; fermentation; methane; rye; silage; storage time;     Show all 9 Subjects
Abstract:
... An innovative process aiming to combine storage and alkali pretreatment of cover crops was investigated using lime as a low cost and environmental friendly reactant. Different lime loadings and Total Solid concentrations (TS) allowed to highlight the abiotic mechanisms of deacetylation during the early stages of the process. Long-term storage experiments of rye and sunflower cover crops at 100 g.k ...
DOI:
10.1016/j.biortech.2022.126722

20. High temperatures and pressures during cooking hinder the nanofibrillation of purified pulp

Author:
Ting-Hsuan Ku; Hiroyuki Yano; Kentaro Abe
Source:
Carbohydrate polymers 2022 v.298 pp. 120078
ISSN:
0144-8617
Subject:
alkali treatment,   etc   ; cell walls; cellulose nanofibers; hemicellulose; kraft pulp; lignin; raw materials; temperature;     Show all 8 Subjects
Abstract:
... Kraft pulp is an abundant raw material for producing cellulose nanofibers. However, our previous study demonstrated that kraft cooking hinders the nanofibrillation of never-dried pulp. Therefore, this study aims to elucidate the specific factors of kraft cooking hindering nanofibrillation, particularly the effects of high temperature and pressure. Undried purified pulp, produced using the Wise met ...
DOI:
10.1016/j.carbpol.2022.120078