Removal of inhibitory furan aldehydes in lignocellulosic hydrolysates via chitosan-chitin nanofiber hybrid hydrogel beads

2021 ◽  
pp. 126563
Author(s):  
Huimin Sun ◽  
Liang Liu ◽  
Wen Liu ◽  
Qing Liu ◽  
Zhaojuan Zheng ◽  
...  
Keyword(s):  
Hybrid Hydrogel ◽  
Lignocellulosic Hydrolysates ◽  
Hydrogel Beads ◽  
Chitin Nanofiber

scholarly journals Isolation of Circulating Biomarkers for Liquid Biopsy using Immunoaffinity‐Based Stimuli‐Responsive Hybrid Hydrogel Beads

2021 ◽  
Author(s):  
Yoon-Tae Kang ◽  
Young Jun Kim ◽  
Brittany Rupp ◽  
Emma Purcell ◽  
Thomas Hadlock ◽  
...  
Keyword(s):  
Liquid Biopsy ◽  
Stimuli Responsive ◽  
Circulating Biomarkers ◽  
Hybrid Hydrogel ◽  
Hydrogel Beads

scholarly journals Nanoporous Sodium Carboxymethyl Cellulose-g-poly (Sodium Acrylate)/FeCl3 Hydrogel Beads: Synthesis and Characterization

Gels ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 49
Author(s):  
Bijender Kumar ◽  
Ruchir Priyadarshi ◽  
Sauraj ◽  
Farha Deeba ◽  
Anurag Kulshreshtha ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Sodium Acrylate ◽  
X Ray Diffraction ◽  
Hybrid Hydrogel ◽  
X Ray ◽  
Hydrogel Beads ◽  
Force Microscopy ◽  
Atomic Force ◽  
Potential Applications

Novel sodium carboxymethyl cellulose-g-poly (sodium acrylate)/Ferric chloride (CMC-g-PNaA/FeCl3) nanoporous hydrogel beads were prepared based on the ionic cross-linking between CMC-g-PNaA and FeCl3. The structure of CMC and CMC-g-PNaA were elucidated by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) spectroscopy, and the elemental composition was analyzed by energy dispersive X-ray analysis (EDX). The physicochemical properties of the CMC-g-PNaA/FeCl3 hydrogel beads were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and thermogravimetric analysis (TGA). The swelling percentage of hydrogel beads was studied at different time periods. The obtained CMC-g-PNaA/FeCl3 hydrogel beads exhibited a higher nanoporous morphology than those of CMC-g-PNaA and CMC beads. Furthermore, an AFM image of the CMC-g-PNaA/FeCl3 beads shows granule type topology. Compared to the CMC-g-PNaA (189 °C), CMC-g-PNaA/FeCl3 hydrogel beads exhibited improvement in thermal stability (199 °C). Furthermore, CMC-g-PNaA/FeCl3 hydrogel beads depicted a higher swelling percentage capacity of around 1452%, as compared to CMC-g-PNaA (1096%). Moreover, this strategy with preliminary results could be useful for the development of polysaccharide-based hybrid hydrogel beads for various potential applications.

Enhanced mechanical stability and sensitive swelling performance of chitosan/yeast hybrid hydrogel beads

2016 ◽  
Vol 40 (4) ◽  
pp. 3350-3362 ◽  
Author(s):  
Diejing Feng ◽  
Bo Bai ◽  
Honglun Wang ◽  
Yourui Suo
Keyword(s):  
Mechanical Stability ◽  
Hybrid Hydrogel ◽  
Hydrogel Beads ◽  
Chitosan Hydrogels ◽  
Yeast Hybrid

Up to the present time, improving the mechanical stability of hydrogel beads is still a challenging task for future applications of chitosan hydrogels.

scholarly journals Survival and Behavior of Encapsulated Probiotics (Lactobacillus plantarum) in Calcium-Alginate-Soy Protein Isolate-Based Hydrogel Beads in Different Processing Conditions (pH and Temperature) and in Pasteurized Mango Juice

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Ong-Ard Praepanitchai ◽  
Athapol Noomhorm ◽  
Anil Kumar Anal
Keyword(s):  
Lactobacillus Plantarum ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Heat Processing ◽  
Hybrid Hydrogel ◽  
Hydrogel Beads ◽  
Acidic Conditions ◽  
Mango Juice ◽  
And Behavior

Hybrid alginate-soy protein isolate-based hydrogel beads were prepared and evaluated to enhance the survival of the encapsulated probiotics (Lactobacillus plantarum) during heat processing to incorporate in mango juice. The solutions of sodium alginate-soy protein isolate (SA-SPI) with probiotic cells were dropped into the gelation bath containing calcium chloride (3% w/v) solution to develop various types of hydrogel beads. The level of survival of probiotics in encapsulated beads under acidic conditions (pH 2, 3, and 6.5) and bile salt (0.5 and 1.0% w/v) was evaluated. The survival of the encapsulated probiotics to thermal processing was evaluated by treating the beads in saline solution (0.9% w/v) at 30, 50, 63, and 72°C. The encapsulated probiotic bacteria were found alive even after treatment at 72°C for 90 s. Most of the free cells did not survive at the temperature higher than 50°C and very low pH (pH 2 and 3). The survival of probiotic cells was found higher with the hybrid hydrogel beads containing alginate and soy protein isolate (1:8 w/w). Furthermore, mango juice fortified with encapsulated L. plantarum in hydrogel beads was subjected to thermal pasteurization at 72°C for 90 s.

scholarly journals Self‐Assembling Supramolecular Hybrid Hydrogel Beads

2020 ◽  
Vol 59 (2) ◽  
pp. 853-859 ◽  
Author(s):  
Carmen C. Piras ◽  
Petr Slavik ◽  
David K. Smith
Keyword(s):  
Hybrid Hydrogel ◽  
Hydrogel Beads ◽  
Self Assembling

scholarly journals Self‐Assembling Supramolecular Hybrid Hydrogel Beads

2019 ◽  
Vol 132 (2) ◽  
pp. 863-869 ◽  
Author(s):  
Carmen C. Piras ◽  
Petr Slavik ◽  
David K. Smith
Keyword(s):  
Hybrid Hydrogel ◽  
Hydrogel Beads ◽  
Self Assembling

scholarly journals Probing the release of the chronobiotic hormone melatonin from hybrid calcium alginate hydrogel beads

2020 ◽  
Vol 70 (4) ◽  
pp. 527-538 ◽  
Author(s):  
Marilena Vlachou ◽  
Angeliki Siamidi ◽  
Efstratia Goula ◽  
Panagiotis Georgas ◽  
Natassa Pippa ◽  
...  
Keyword(s):  
Molecular Mass ◽  
Calcium Alginate ◽  
Aqueous Media ◽  
Sleep Onset ◽  
Alginate Beads ◽  
Poor Sleep ◽  
Hybrid Hydrogel ◽  
Hydrogel Beads ◽  
Degradation Properties

AbstractA variety of commonly used hydrogels were utilized in the preparation of calcium alginate beads, which incorporate the chronobiotic hormone melatonin (MLT). The in vitro release of the hormone in aqueous media at pH 1.2 and 6.8 was probed in the conjunction with the swelling of the beads and their thermal degradation properties. It has been found that the release of MLT from the beads was reversibly proportional to the extent of their expansion, which depends on the molecular mass/viscosity of the biopolymers present in the beads; the higher the molecular mass/viscosity of the hydrogels the greater the beads swelling and the less the MLT’s release. Thermogravimetric analysis (TGA) data support the presence of the components in the hybrid hydrogel beads and elucidate their effects on the thermal stability of the systems. Thus, the physicochemical properties of the biopolymers used, along with their stereoelectronic features modulate the release of MLT from the beads, providing formulations able to treat sleep onset related problems or dysfunctions arising from poor sleep maintenance.

scholarly journals Further engineering of R. toruloides for the production of terpenes from lignocellulosic biomass

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
James Kirby ◽  
Gina M. Geiselman ◽  
Junko Yaegashi ◽  
Joonhoon Kim ◽  
Xun Zhuang ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Copy Number ◽  
Mevalonate Pathway ◽  
Mevalonate Kinase ◽  
Metabolite Analysis ◽  
Lignocellulosic Hydrolysate ◽  
Microbial Conversion ◽  
Lignocellulosic Hydrolysates ◽  
Lignocellulosic Feedstocks ◽  
Fuels And Chemicals

Abstract Background Mitigation of climate change requires that new routes for the production of fuels and chemicals be as oil-independent as possible. The microbial conversion of lignocellulosic feedstocks into terpene-based biofuels and bioproducts represents one such route. This work builds upon previous demonstrations that the single-celled carotenogenic basidiomycete, Rhodosporidium toruloides, is a promising host for the production of terpenes from lignocellulosic hydrolysates. Results This study focuses on the optimization of production of the monoterpene 1,8-cineole and the sesquiterpene α-bisabolene in R. toruloides. The α-bisabolene titer attained in R. toruloides was found to be proportional to the copy number of the bisabolene synthase (BIS) expression cassette, which in turn influenced the expression level of several native mevalonate pathway genes. The addition of more copies of BIS under a stronger promoter resulted in production of α-bisabolene at 2.2 g/L from lignocellulosic hydrolysate in a 2-L fermenter. Production of 1,8-cineole was found to be limited by availability of the precursor geranylgeranyl pyrophosphate (GPP) and expression of an appropriate GPP synthase increased the monoterpene titer fourfold to 143 mg/L at bench scale. Targeted mevalonate pathway metabolite analysis suggested that 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGR), mevalonate kinase (MK) and phosphomevalonate kinase (PMK) may be pathway bottlenecks are were therefore selected as targets for overexpression. Expression of HMGR, MK, and PMK orthologs and growth in an optimized lignocellulosic hydrolysate medium increased the 1,8-cineole titer an additional tenfold to 1.4 g/L. Expression of the same mevalonate pathway genes did not have as large an impact on α-bisabolene production, although the final titer was higher at 2.6 g/L. Furthermore, mevalonate pathway intermediates accumulated in the mevalonate-engineered strains, suggesting room for further improvement. Conclusions This work brings R. toruloides closer to being able to make industrially relevant quantities of terpene from lignocellulosic biomass.

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