Article
Materials Science, Paper & Wood
Jing Zhang, Yan Bao, Mingyuan Guo, Zhenghua Peng
Summary: In this study, a self-emulsifying aqueous emulsion of cellulose diacetate (CDA) was synthesized for leather finishing by incorporating dimethylolbutyric acid (DMBA) as the hydrophilic agent and hexamethylene diisocyanate (HDI) as the bridging agent. Addition of flexible carbon chain of HDI improved the reactivity of CDA. By using 1,4-butanediol (BDO) and propylene glycol polyether (N210) as chain extenders, the emulsion stability and coating flexibility were enhanced. The modified nano-SiO2 in the emulsion improved the overall performance of the coating.
Article
Chemistry, Multidisciplinary
Liuting Zhong, Junqiu Zhai, Yan Ma, Yihong Huang, Yongrui Peng, Yu-E Wang, Zhuo Peng, Hailing Gan, Zhongwen Yuan, Pengke Yan, Qingguo Li, Shixia Guan
Summary: A core-shell molecularly imprinted polymer nanoparticle with biological enzyme functional characteristics was developed in this study. The nanoparticle showed specific binding characteristics with the template protein and could enrich and degrade the target molecules. It has potential applications in the adjuvant treatment of cytokine release syndrome.
Article
Biochemistry & Molecular Biology
Rui-Wen Ren, Xiao-Quan Chen, Wen-Hao Shen
Summary: This study demonstrates the preparation of pure spherical CNCs through enzymatic hydrolysis and determines the optimal separation conditions. Compared to MCC, spherical CNCs exhibit lower crystallinity and superior performance.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Environmental
Roger Borges, Lilian Fernanda Martins do Amaral, Thalita Jessika Bondancia, Rilton Alves de Freitas, Fernando Wypych, Caue Ribeiro
Summary: Cellulose acetate can be recovered and reused through mechanochemical activation and treatment with citric acid and H2O2. Ca(OH)2 can hydrolyze acetate groups, while CaCO3 can reduce particle size while keeping the acetate functional groups. The resulting cellulose nanoparticles can be used in Pickering emulsions with slight differences in droplet sizes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Ioanna Stamogiannou, John Van Camp, Guy Smagghe, Davy Van de Walle, Koen Dewettinck, Katleen Raes
Summary: Different classes of phenolic compounds have distinct effects on the enzymatic hydrolysis of cellulose, acting as activators or inhibitors. The presence of the -OCH3 group is found to be crucial for the activating effect of phenolic compounds. Adsorption analysis and SEM images indicate that the activating or inhibiting action of phenolic compounds can lead to different adsorption modes, either on the enzyme or on the substrate.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biochemistry & Molecular Biology
Thalita J. J. Bondancia, Camila Florencio, Graziela S. S. Baccarin, Cristiane S. S. Farinas
Summary: Cellulose nanostructures obtained from lignocellulosic biomass by the enzymatic route can offer advantages in terms of material properties and processing sustainability. The presence of auxiliary enzymes can promote the production of nanocellulose with improved properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Review
Agricultural Engineering
David Alexander Mitchell, Isabelle Moreira, Nadia Krieger
Summary: Stochastic models have the potential to be important tools in describing the complex network of reactions involved in enzymatic hydrolysis of polysaccharides, but many current models lack biologically meaningful parameters. Only a few models utilize classical enzyme kinetics parameters, and recent research on stochastic models for cellulose hydrolysis provides valuable insights into the molecular-level phenomenon limiting hydrolysis rates. Further improvements are necessary for stochastic models of enzymatic polysaccharide hydrolysis to become widely used tools for guiding process development.
BIORESOURCE TECHNOLOGY
(2021)
Review
Environmental Sciences
Nisha Yadav, Minna Hakkarainen
Summary: Biodegradable and/or biobased plastics are seen as potential solutions to the plastic waste problem, but achieving complete degradation in natural environments remains challenging, with the interactions between chemical structure, composition, and degradation environment playing a crucial role.
Article
Biochemistry & Molecular Biology
Regan Ceaser, Annie F. A. Chimphango
Summary: Two methods, HCl and enzymatic treatments, were evaluated for diversifying the morphological and functional properties of cellulose nanofibers extracted from two-stage-alkaline pre-treated wheat straw. The HCN and ECN had different properties in terms of diameter, length, crystallinity, and thermal degradation, suitable for different nano-applications. Both methods showed potential synergetic effects on CNF production and properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Peng Wen, Hao Wang, Mengli Xu, Lu Zhang, Han Zheng, Jiao Xie, Mao Chen
Summary: In this study, poly(4-pinacolatoborylstyrene) (PB) was synthesized and used as a macromolecular cross-linker for cellulose acetate (CA), which successfully improved the mechanical and rheological properties of CA without sacrificing transparency. Moreover, the obtained CA materials could be recycled via solution reprocessing without significant decrease of mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Peng Wen, Hao Wang, Mengli Xu, Lu Zhang, Han Zheng, Jiao Xie, Mao Chen
Summary: In this study, a multi-functional polymer PB was synthesized and successfully utilized as a cross-linker for CA. The mechanical and rheological properties of CA were improved without compromising its transparent appearance by the dynamic coordination interaction between PB and CA. The obtained CA materials could be recycled via solution reprocessing without significant decrease in mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Guoming Zeng, Xuanhao Fan, Fei Wang, Yang Luo, Dong Liang, Yongguang Han, Pei Gao, Quanfeng Wang, Jiale Wang, Chunyi Yu, Libo Jin, Da Sun
Summary: The aim of this study was to reduce environmental pollution and improve the enzymatic hydrolysis rate of corn straw. A pretreatment method using ionic liquid to treat metal ion solution was developed. The conditions of ionic liquid treatment were optimized using the response surface design method. The results showed increased yield of reducing sugar and cellulose content, indicating improved enzymatic hydrolysis efficiency of corn straw after ionic liquid treatment.
Article
Materials Science, Multidisciplinary
Ana Kramar, Javier Gonzalez-Benito
Summary: In this study, cellulose acetate materials were prepared using the SBS method, and the solvent system and SBS processing parameters were used to control the thermal properties, crystallinity, and morphology of the materials. The roughness and porosity of the materials influenced the contact angle, and a double-layered film with dual wettability was obtained.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Fatma Seden Tekin, P. Zeynep Culfaz-Emecen
Summary: The effects of three different solvent systems on the preparation of cellulose acetate membranes by phase inversion were investigated. Acetone as cosolvent resulted in an asymmetric membrane morphology, while acetic acid led to a loose, almost isotropic structure. The phase inversion rate was significantly lower when acetic acid was used as cosolvent, mainly due to its high viscosity.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Faik Bolat, Jana Ghitman, Madalina Ioana Necolau, Eugeniu Vasile, Horia Iovu
Summary: Due to its exceptional capabilities, biodegradability, and optical and barrier qualities, nanocellulose is of great interest as a source of nanoscale reinforcing materials. This article focuses on the manufacturing of cellulose nanomaterials from cotton using different acids and enzymes, and the effects of bleaching methods on the properties of the nanocellulose materials. Various techniques were used to analyze the obtained materials, and the results showed successful synthesis of cellulose nanofibrils through enzymatic hydrolysis.
Article
Food Science & Technology
Hani Shkolnikov, Valeria Belochvostov, Zoya Okun, Avi Shpigelman
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2020)
Article
Food Science & Technology
Eden Eran Nagar, Zoya Okun, Avi Shpigelman
CURRENT OPINION IN FOOD SCIENCE
(2020)
Article
Food Science & Technology
Anna-Sophie Stuebler, Uri Lesmes, Andreas Juadjur, Volker Heinz, Cornelia Rauh, Avi Shpigelman, Kemal Aganovic
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2020)
Review
Food Science & Technology
Rachel Levy, Zoya Okun, Avi Shpigelman
Summary: (U)HPH is a promising technology in the food industry for improving microbial safety and shelf life of liquid foods while enhancing the functionality of food components. The factors like valve geometry, pressure level, and temperature during homogenization cycles play crucial roles in achieving desired outcomes.
FOOD ENGINEERING REVIEWS
(2021)
Article
Food Science & Technology
Hadas Katzav, Libi Chirug, Zoya Okun, Maya Davidovich-Pinhas, Avi Shpigelman
Article
Engineering, Chemical
Eden Eran Nagar, Liora Berenshtein, Inbal Hanuka Katz, Uri Lesmes, Zoya Okun, Avi Shpigelman
Summary: Polyphenols are believed to have various health benefits, but their absorption is often poor. The study found that structural differences affect the bioaccessibility of polyphenols in the digestive system, with processing being the most significant influencing factor.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Anna-Sophie Stuebler, Lena Boehmker, Andreas Juadjur, Volker Heinz, Cornelia Rauh, Avi Shpigelman, Kemal Aganovic
Summary: This study found that strawberry anthocyanins degrade easily during processing and storage, depending on matrix conditions, preservation technology, and anthocyanin structure. The degradation rate was higher for the strawberry-kale mix compared to the strawberry-water mix. Additionally, processing and formulation strongly affect the stability and bioaccessibility of anthocyanins during storage.
Article
Chemistry, Applied
Rachel Levy, Zoya Okun, Maya Davidovich-Pinhas, Avi Shpigelman
Summary: The combination of potato protein isolate and high-pressure homogenization was successful in producing a yogurt-like fermented product without stabilizers. Increasing homogenization pressure improved the physical stability of the product and reduced phase separation.
FOOD HYDROCOLLOIDS
(2021)
Article
Chemistry, Applied
Alon Romano, Carolina Lajterer, Avi Shpigelman, Uri Lesmes
Summary: This study reveals that capsaicin (CAP) can form molecular complexes with alpha-lactalbumin (ALA), showing potential biological activity. Through calorimetric and spectroscopic techniques, it is found that ALA-CAP molecular complexation is spontaneous, exothermic, and accompanied by various conformational changes. Additionally, the interaction stoichiometry and binding constant for holo-ALA and apo-ALA are determined, with molecular docking further elucidating the mechanisms of CAP binding to ALA.
Article
Chemistry, Applied
Libi Chirug, Eden Eran Nagar, Zoya Okun, Avi Shpigelman
Summary: The study found that flavonoid compounds with a C2-C3 double bond interacted with pectin, while those without this double bond did not bind to pectin. Moreover, a pH of 2.5 significantly reduced binding, while the difference between pH 4.5 and 6.5 was small and structure-dependent.
FOOD HYDROCOLLOIDS
(2021)
Article
Food Science & Technology
Hani Shkolnikov Lozober, Zoya Okun, Avi Shpigelman
Summary: The study focused on the gel characterization of Spirulina protein concentrate (SPC) and utilized high-pressure homogenization (HPH) before thermal gelation to improve gel properties. Gelation was found possible at pH 6.5 but not at more acidic pH due to insufficient protein solubility. The application of HPH at 50 MPa increased protein solubility by 91% and improved gel stiffness while decreasing the gelation point.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Food Science & Technology
Rachel Levy, Zoya Okun, Avi Shpigelman
Summary: The study investigated the potential of high-pressure homogenization (HPH) to produce plant-based yogurt alternatives with different oil concentrations. HPH treatment resulted in reduced emulsion particle size, increased emulsion whiteness, and decreased creaming velocity. This technology could provide opportunities for the food industry to produce dairy alternatives with clean labels and improved product quality.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2022)
Article
Chemistry, Applied
Eden Eran Nagar, Zoya Okun, Avi Shpigelman
Summary: Polyphenols are health-promoting compounds with low bioavailability. Evaluating their bioaccessibility is important for understanding their bioavailability. This study investigated the influence of dissolved oxygen and bile on the bioaccessibility of seven polyphenols. The results suggest that the assumptions about anthocyanin degradation may be incorrect, and provide insights for developing more specific methods for in-vitro polyphenol digestion studies.
Article
Biochemistry & Molecular Biology
Hani Shkolnikov Lozober, Zoya Okun, Galit Parvari, Avi Shpigelman
Summary: The utilization of natural blue pigments in food is challenging due to their instability during processing and the commonly used pH. This study focuses on the stability of phycocyanobilin in comparison to phycobiliproteins under high-pressure, high-temperature, and storage conditions.
Review
Chemistry, Physical
Valeria Weiss, Zoya Okun, Avi Shpigelman
Summary: Natural pigments provide appealing colors and potential health benefits, but are unstable and limited in use. Synthetic food colorants, while stable, are often associated with adverse health effects. Hydrocolloids can improve the chemical and physical stability of natural pigments, enhancing color stability.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2023)
