AYÇA BAL ÖZTÜRK^1,2,*, ZEHRA ÖZBA޳, BENGİ ÖZKAHRAMAN⁴, SERKAN EMİK⁵

Journal of Polymer Materials, Vol.36, No.2, pp. 161-173, 2019, DOI:10.32381/JPM.2019.36.02.5

Abstract A functionalized hydrogel composed of 2-(hydroxyethyl) methacrylate (HEMA) and acrylamide (AAm) was synthesized by amination and saponification reactions, respectively, and its functionality was examined for the elimination of copper(II) ions. The maximum adsorption capacity for copper(II) ions was 0.617 mmol g^-1 before saponification, whereas it was 1.2225 mmol g^-1 after saponification. The adsorption data was analyzed with pseudo-first-order (r² =0.8867), intra-particle diffusion (r² =0.9453), Elovich (r²=0.9489) and pseudo-secondorder(r² =0.9999) kinetic models. Based on the adsorption equilibrium experimental data Freundlich(r² =0.9964), Langmuir(r²=0.998) and Dubinin–Radushkevich (D-R) (r² =0.9960) adsorption isotherms provided good fits for all of experimental results. Finally, the datas of More >

Malika Talantikite^1,*, Antoine Gourlay¹, Sophie Le Gall¹, Bernard Cathala¹

Journal of Renewable Materials, Vol.7, No.12, pp. 1381-1390, 2019, DOI:10.32604/jrm.2019.07838

Abstract Plant components are an inexhaustible source for the construction of bio-based materials. Here we report, for the first time, the elaboration of biobased cellulose nanocrystals (CNC)/xyloglucan (XG) hydrogels. XG is a hemicellulose displaying a great affinity for cellulose surface and can be thus irreversibly adsorbed on CNC. Properties of the hydrogels were investigated by varying the molar mass of XG either by enzymatic treatment with Endoglucanase (EG2) or physical fractionation by ultrasound (US). Fractions were characterised by high-performance size exclusion chromatography (HPSEC) and their monosacchari decompositions were determined. Three fractions with high, average and small… More >

Xiaoliang Zhao^1,#, Yuting Wang^1,#, Xiuying Pu¹, Jianzhong Ma¹, Feifan Leng¹, Yonggang Wang¹, Yanling Wang¹, Shuhong Yang¹, Fen Ran², Weijie Zhang^1,*

Journal of Renewable Materials, Vol.7, No.12, pp. 1321-1332, 2019, DOI:10.32604/jrm.2019.07757

Abstract A series of the Guiqi polysaccharides/chitosan/alginate composite hydrogel microspheres (GPcM) with different particle sizes were prepared with Guiqi polysaccharides (GP), chitosan (CS) and sodium alginate (Alg). The optimum preparation process was also determined by single factor and orthogonal experiment analysis. The GPcM were characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), drug loading efficiency test (LE), encapsulation efficiency test (EE) and in vitro release study. The results showed that the Guiqi polysaccharides chitosan hydrogel (GPCH) and sodium alginate hydrogel (SAH) formed a crossover system in GPcM. The GPcM have a uniform particle More >

Ying Li¹, Bin Xue², Wenxu Sun², Junhua Wu², Wenting Yu², Meng Qin², Wei Wang², Yi Cao^2,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 147-147, 2019, DOI:10.32604/mcb.2019.07027

Abstract A key challenge in biomaterials research is to produce synthetic hydrogels that can replicate the diverse mechanical properties of the naturally occurring tissues for various biomedical applications, including tissue engineering, stem cell and cancer research, cell therapy, and immunomodulation. However, currently, the methods that can be used to control the mechanical properties of hydrogels are very limited and are mainly focused only on the elasticity of hydrogels. In this work, combining single molecule force spectroscopy, protein engineering and theoretical modeling, we show that synthetic protein hydrogels with predictable mechanical properties can be rationally designed using… More >

Pan Zhang^1,2, Chen Zhang^1,2, Jiyang Han^1,2, Xiru Liu^1,2, Qishan Wang³, Hui Yang^1,2,4,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 132-132, 2019, DOI:10.32604/mcb.2019.06839

Abstract Research in stem cell biology relies on the knowledge of the cell microenvironment in vivo, known as “stem cell niche”, where stem cells are nurtured by the niche signals. Hematopoietic stem cells (HSCs) are capable of continuously generating and maintaining the body’s full immune and hematopoietic systems. In adult, a pool of hematopoietic cells, including HSCs, primarily reside in the bone marrow (BM) niches that plays critical roles on cell fate. Niche supporting cells, cytokines, extracellular matrix proteins and other biochemical cues associated with HSCs behaviors (quiescence, self-renewal, proliferation, differentiation, mobilization, homing, and apoptosis) has… More >

Dominique P. Pioletti^1,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 29-30, 2019, DOI:10.32604/mcb.2019.07050

Abstract From a mechanical point of view, articular cartilage can be considered as a viscoelastic porous material. Its dissipation capabilities are therefore central for its functional behavior. Based on this observation, we focused our studies of dissipative aspects in cartilage either from a biomechanical or mechanobiological point of view. In particular, we capitalized on the new obtained insight of dissipative behavior or sources in materials for the development of functional biomaterials for cartilage tissue engineering. We pioneered in proposing dissipation as a mechanobiological variable for cartilage tissue engineering [1]. As can be observed on Fig. 1,… More >

Xiaoyu Chen*, Jie Zhu

Journal of Renewable Materials, Vol.7, No.10, pp. 983-996, 2019, DOI:10.32604/jrm.2019.07325

Abstract With the rapid development of textile industry, a large amount of dye-contaminated effluents was produced and caused serious environmental problem. To remove the dye from effluents, adsorption materials have been applied because of their relatively cheap, high efficiency, and easy handling. In this study, a novel composite hydrogel bead with unique multilayer flake structure was fabricated by alginate, acrylamide and attapulgite for dye adsorption. Acrylamide was grafted polymerization onto alginate to obtain alginate-g-poly(acrylamide). Then alginate-g-poly(acrylamide) was cross-linked by Ca²⁺ ions in present of attapulgite to form composite hydrogel bead. Scanning electron microscopy (SEM) results show that… More >

Mahmoud MOUSTAFA^1,2*, Tarek TAHA³, Mohamed ELNOUBY⁴, M.A. ABU-SAIED⁵, Ali SHATI¹, Mohamed AL-KAHTANI¹, Sulaiman ALRUMMAN¹

BIOCELL, Vol.42, No.1, pp. 7-12, 2018, DOI:10.32604/biocell.2018.07002

Abstract Many recent studies are concerned with low cost, easy to handle and alternative renewable energy as a feasible solution for the upcoming crisis of energy shortage. Microalgae are unicellular entities the can only depend on CO2, water and solar power to cover their nutritional needs. The current study is concerned with using algal cells in a polymeric hydrogel, as a cheap source of energy for electricity generation. Chlorella vulgaris has been proved to be a promising algal species for electricity generation, as compared with Micractinium reisseri. PVA hydrogel has been used for the immobilization of both algal… More >

Sawsan Dacrory^1*, Hussein Abou-Yousef¹, Ragab E. Abou-Zeid¹, Samir Kamel¹, Mohamed S. Abdel-Aziz², Mohamed Elbadry³

Journal of Renewable Materials, Vol.6, No.5, pp. 536-547, 2018, DOI:10.7569/JRM.2017.634190

Abstract Carboxymethyl cellulose hydrogels were developed through crosslinking process using eco-friendly crosslinkers such as maleic, succinic, and citric acids. Carboxymethyl cellulose was prepared from the cellulosic fraction of olive industry residues. A series of hydrogels with varying crosslinker acid concentrations, reaction times, and reaction temperatures was produced to study the swelling capacities and gel fraction of the obtained hydrogels. Additional study pertains to the preparation of antimicrobial nanocomposite hydrogels through in-situ incorporation of the silver nanoparticles during the crosslinking reaction. Silver nanoparticles were prepared by reduction of AgNO3with leaves of Ricinus communis. The particle size of More >

González FM, DR Pérez

Phyton-International Journal of Experimental Botany, Vol.86, pp. 332-339, 2017, DOI:10.32604/phyton.2017.86.332

Abstract The Argentine arid Patagonia, in general, and ‘La Payunia’ ecosystem in particular, are important areas for conservation due to the high number of endemic species. However, this region presents a high level of degradation as a result of human activities. Thus, ecological rehabilitation strategies need to be implemented to recover certain areas. The main objectives of this study were to (1) evaluate the reintroduction of two selected native species in severely degraded areas, and (2) determine if the survival and growth of an endemic shrub species, Senna arnottiana, increase when it is associated with a perennial… More >