Jaša Saražin¹, Ida Poljanšek¹, Antonio Pizzi², Milan Šernek^1,*

Journal of Renewable Materials, Vol.10, No.8, pp. 2117-2131, 2022, DOI:10.32604/jrm.2022.019602

Abstract The curing process of two biobased adhesives: pine tanninhexamine (TH) and organosolv lignin non-isocyanate polyurethane (NIPU), suitable for interior nonstructural use, were compared with commercial urea-formaldehyde (UF) adhesive. Changes in chemical structure before and after the curing process were observed with Fouriertransform infrared spectroscopy (FTIR). The process of adhesive curing was monitored with differential scanning calorimetry (DSC) and the automated bonding evaluation system (ABES). Both DSC and ABES measurements confirmed UF as the fastest and NIPU as the slowest curing adhesive observed. Taking into account the ABES results, the optimal pressing parameters for the TH adhesive would be 4 min… More >

AMANDA BARACHO TRINDADE HILL^1,2,*, JONATHAN EDWIN BARACHO TRINDADE HILL²

BIOCELL, Vol.46, No.5, pp. 1173-1176, 2022, DOI:10.32604/biocell.2022.018637

Abstract Mesenchymal stem cells (MSCs) represent an important tool in veterinary regenerative medicine due to their ability to home to injury sites and secrete molecules that regulate niches into regenerative microenvironments. Successful cell therapy depends on many factors, including choice of administration route and application of understanding of cell potency and their therapeutic mechanisms. In this point of view, the authors leverage the tumultuous history of the field to demonstrate the need for clinicians to continually update themselves as new discoveries are made in order to avoid misalignments in the future, especially regarding administration routes and dose frequency, as well as… More >

Simon Martinez¹, Jürgen Lenz¹, Hans Schindler^1,2, Willi Wendler¹, Stefan Rues³, Karl Schweizerhof^1,*, Sophia Terebesi², Nikolaos Nikitas Giannakopoulos², Marc Schmitter²

CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1259-1281, 2021, DOI:10.32604/cmes.2021.017422

Abstract The occlusal design plays a decisive role in the fabrication of dental restorations. Dentists and dental technicians depend on mechanical simulations of mandibular movement that are as accurate as possible, in particular, to produce interference-free yet chewing-efficient dental restorations. For this, kinetic data must be available, i.e., movements and deformations under the influence of forces and stresses. In the present study, so-called functional data were collected from healthy volunteers to provide consistent information for proper kinetics. For the latter purpose, biting and chewing forces, electrical muscle activity and jaw movements were registered synchronously, and individual magnetic resonance tomograms (MRI) were… More >

S. M. Atiqure Rahman^1,*, Hegazy Rezk^2,3, Mohammad Ali Abdelkareem^1,4, M. Enamul Hoque⁵, Tariq Mahbub⁶, Sheikh Khaleduzzaman Shah⁷, Ahmed M. Nassef^2,8

CMC-Computers, Materials & Continua, Vol.67, No.3, pp. 3143-3160, 2021, DOI:10.32604/cmc.2021.015048

Abstract The main goal of this research is to develop and apply a robust Artificial Neural Networks (ANNs) model for predicting the characteristics of the osmotically drying treated potato and apple samples as a model heat-sensitive product in vacuum contact dryer. Concentrated salt and sugar solutions were used as the osmotic solutions at 27C. Series of experiments were performed at various temperatures of 35C, 40C, and 55C for conduction heat input under vacuum ( −760 mm Hg) condition. Some experiments were also performed in a pure vacuum without heat addition. Dimensionless moisture content (DMC), effective moisture diffusivity, and mass flux were… More >

YANJUAN LIAO^1,#, DONGLING YU^2,#, XIAOFANG QIN¹, JINMEI WU¹, HUI WEI¹, HUI LI¹, XIANGYING MA^1,*, ZAIYIN HUANG^1,*

BIOCELL, Vol.44, No.4, pp. 703-711, 2020, DOI:10.32604/biocell.2020.012047

Abstract Despite the great potential of photosynthetic microbes in the production of renewable fuels, value-adding chemicals, and water treatment, etc., commercial utilization of them is significantly hindered by the lack of techniques to accurately monitor the thermodynamic and kinetic characteristics of the In-situ growth of microbes under controlled light illumination for optimal cultivation. Herein, we demonstrated that a newly developed highly sensitive photo-microcalorimetric system successfully captured the impacts of the light wavelength and strength on the thermodynamic and kinetic parameters of the In-situ growth of Rhodopseudomonas palustris, a representative photosynthetic microorganism. To our best knowledge, this is the first time that… More >

Dexby de Guzman, Rizalinda de Leon^*

Journal of Renewable Materials, Vol.9, No.1, pp. 145-162, 2021, DOI:10.32604/jrm.2021.011646

Abstract Levulinic acid (LA) is a platform biorefinery chemical from biomass which can be converted to green solvents, plasticizers, polymer precursors, bio-based cleaning agents, fuels and fuel additives. This study assessed the potential of SnCl₂-based mixed acid systems as catalyst in the hydrothermal conversion of microcrystalline cellulose to levulinic acid. Maximum LA yield of 36.2 mol% was achieved using 0.2 M SnCl₂ concentration at test conditions of 3 h, 180°C and 1% w/v cellulose loading. To reduce precipitate formation and further improve LA yield, the strategy employed was to combine SnCl₂ (a Lewis acid) with conventional mineral acids (Bronsted acids). Evaluation… More >

Günter Wuzella¹, Arunjunai Raj Mahendran¹, Andreas Kandelbauer^2,*

Journal of Renewable Materials, Vol.8, No.5, pp. 499-512, 2020, DOI:10.32604/jrm.2020.09615

Abstract Here, we report the mechanical and water sorption properties of a green composite based on Typha latifolia fibres. The composite was prepared either completely binder-less or bonded with 10% (w/w) of a bio-based resin which was a mixture of an epoxidized linseed oil and a tall-oil based polyamide. The flexural modulus of elasticity, the flexural strength and the water absorption of hot pressed Typha panels were measured and the influence of pressing time and panel density on these properties was investigated. The cure kinetics of the biobased resin was analyzed by differential scanning calorimetry (DSC) in combination with the iso-conversional… More >

Qiaoguang Li¹, Sheng Gong¹, Jie Yan¹, Hongchao Hu¹, Xugang Shu^1,2,*, Hanqing Tong^3,*, Zhiye Cai¹

Journal of Renewable Materials, Vol.8, No.3, pp. 289-300, 2020, DOI:10.32604/jrm.2020.08897

Abstract The plasticizer is an important polymer material additive. Non-toxic and environmentally friendly plasticizers are developed recently in order to decrease fossil fuel reserves, serious environmental pollution and the toxicity of phthalate esters. In this study, a new, efficient and environmentally friendly plasticizer of hydrogenated rosin dodecyl ester was prepared by an esterification reaction of hydrogenated rosin and dodecanol. The influences of different reaction conditions (including different catalysts, the catalyst concentration, the ratio of the reactants, reaction temperature, and reaction time) on the esterification yield are examined and discussed. Hydrogenated rosin dodecyl ester with 71.8% yield was synthesized under the optimized… More >

Refat Hassan^1,*, Hideo Takagi², Samia Ibrahim³

Journal of Renewable Materials, Vol.8, No.2, pp. 205-218, 2020, DOI:10.32604/jrm.2020.08530

Abstract A spectrophotometric investigation of oxidation of chondroitin-4-sulfate (CS) as a sustainable and biodegradable sulfated macromolecule by oxyanion permanganate ion as multi-equivalent oxidant in acid perchlorate solutions at a constant ionic strength of 2.0 mol dm^-3 has been studied. The experimental results on the influence of the concentration of the reactants the reaction rates revealed first-order dependence in MnO₄^– , fractional second-order in [CS] and fractional first-order with respect to the hydrogen ion concentration. The hydrogen acid concentration dependence of the rate constants indicated that the oxidation rates were increased with increasing the acid concentration which means that the oxidation reaction… More >

Xueyi Yang¹, Yue Xu¹, Chun Yang^1,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 101-101, 2019, DOI:10.32604/mcb.2019.07117

Abstract Cell-matrix interactions guide various cell behaviors, including proliferation, differentiation, migration, etc. Integrins, as a known transmembrane mechanosensor, undergo conformational changes in response to mechanical stimuli, and manipulate cell-matrix chemical-mechanical coupled signaling transduction [1]. The integrin-ligand bond kinetics has gain increasing attention among researchers. Independent studies showed that the integrin-ligand bond has been reported to be reinforced by the applied force f, while the loading rate df/dt had little effect on the bond lifetime [2].
We previously observed a dramatic increase in bond lifetime beyond a loading rate threshold for the integrin α2β1-DGEA bond, by introducing AFM (Atomic Force Microscopy)… More >