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Bioconversion Processes

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ISBN: 9783038429456 9783038429463 Year: Pages: VI, 150 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biotechnology --- Biology
Added to DOAB on : 2018-06-22 12:05:03
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Compared to conventional chemical technologies and other similar industrial processes, bioprocesses represent a more sustainable and environmentally-friendly alternative for the production of fuels and platform chemicals. In biorefineries, different kinds of feedstocks, such as biomass or lignocellulosic materials in general, can be used and fermented by microorganisms (e.g., bacteria, fungi, algae), after some pretreatment steps, to produce high added-value metabolites. More recently, wastes, wastewaters and also waste gases have been shown to be suitable for resource recovery or for their bioconversion to (bio)fuels (e.g., ethanol, butanol, hexanol, biodiesel, biohydrogen, biogas) or other commercial products (e.g., biopolymers). In this sense, much effort has also been made to bioconvert greenhouse gases, such as CO2, into useful products.The goal of this Special Issue is to publish both recent innovative research data, as well as review papers on the fermentation of different types of substrates to commercial (bio)fuels and (bio)products, mainly focusing on the bioconversion of pollutants in solid, liquid, or gas phases (wastes, wastewaters, waste gases).

Advances in Polyhydroxyalkanoate (PHA) Production, Volume 2

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ISBN: 9783039286409 / 9783039286416 Year: Pages: 202 DOI: 10.3390/books978-3-03928-641-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Biotechnology
Added to DOAB on : 2020-06-09 16:38:57
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Nowadays, we are witnessing highly dynamic research activities related to the intriguing field of biodegradable materials with plastic-like properties. These activities are stimulated by the strengthened public awareness of prevailing ecological issues connected to growing piles of plastic waste and increasing greenhouse gas emissions; this goes hand-in-hand with the ongoing depletion of fossil feedstocks, which are traditionally used to produce full carbon backbone polymers. Polyhydroxyalkanoate (PHA) biopolyesters, a family of plastic-like materials with versatile material properties, are increasing considered to be a future-oriented solution for diminishing these concerns. PHA production is based on renewable resources and occurs in a bio-mediated fashion through the action of living organisms. If accomplished in an optimized way, PHA production and the entire PHA lifecycle are embedded into nature´s closed cycles of carbon. Sustainable and efficient PHA production requires understanding and improvement of all the individual process steps. Holistic improvement of PHA production, applicable on an industrially relevant scale, calls for, inter alia, consolidated knowledge about the enzymatic and genetic particularities of PHA-accumulating organisms, an in-depth understanding of the kinetics of the bioprocess, the selection of appropriate inexpensive fermentation feedstocks, tailoring of PHA composition at the level of its monomeric constituents, optimized biotechnological engineering, and novel strategies for PHA recovery from biomass characterized by low energy and chemical requirements. This Special Issue represents a comprehensive compilation of articles in which these individual aspects have been addressed by globally recognized experts.

Keywords

polyhydroxyalkanoate (PHA), bioprocess design --- carbon dioxide --- cyanobacteria --- upstream processing --- Archaea --- bioeconomy --- biopolyester --- downstream processing --- extremophiles --- haloarchaea --- Haloferax --- halophiles --- polyhydroxyalkanoates --- salinity --- polyhydroxyalkanoates --- terpolymer --- P(3HB-co-3HV-co-4HB) --- Cupriavidus malaysiensis --- polyhydroxyalkanoates --- biomedicine --- biomaterials --- Poly(3-hydroxybutyrate) --- tissue engineering --- wound healing --- delivery system --- poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHVB) --- poly(3-hydroxybutyrate-co-4-hydroxybutyrate) --- bubble column bioreactor --- COMSOL --- microorganism --- PHB --- simulation --- polyhydroxyalkanoate --- PHA --- process analytical technologies --- PAT --- plant oil --- high-cell-density fed-batch --- photon density wave spectroscopy --- PDW --- Ralstonia eutropha --- Cupriavidus necator --- on-line --- in-line --- polyhydroxyalkanoates --- fed-batch --- productivity --- Pseudomonas --- bioreactor --- microaerophilic --- PHA --- viscosity --- non-Newtonian fluid --- fed-batch fermentation --- oxygen transfer --- Pseudomonas putida --- medium-chain-length polyhydroxyalkanoate (mcl-PHA) --- alginate --- biosurfactants --- biopolymer --- Pseudomonas --- blends --- film --- polyhydroxyalkanoates processing --- electrospinning --- additive manufacturing --- selective laser sintering --- fused deposition modeling --- computer-aided wet-spinning --- polyhydroxybutyrate --- tequila bagasse --- hydrolysate detoxification --- activated charcoal --- phenolic compounds --- biomedical application --- cyanobacteria --- feedstocks --- gaseous substrates --- haloarchaea --- high cell density cultivation --- in-line monitoring --- PHA composition --- PHA processing --- polyhydroxyalkanoate --- process engineering --- process simulation --- Pseudomonas sp. --- rheology --- terpolyester --- waste streams

Intrinsically Biocompatible Polymer Systems

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ISBN: 9783039284207 9783039284214 Year: Pages: 270 DOI: 10.3390/books978-3-03928-421-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Materials
Added to DOAB on : 2020-04-07 23:07:09
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Biocompatibility refers to the ability of a biomaterial to perform its desired function with respect to a medical therapy, without eliciting any undesirable local or systemic effects in the recipient or beneficiary of that therapy, but generating the most appropriate beneficial cellular or tissue response in that specific situation, and optimizing the clinically relevant performance of that therapy, which reflects current developments in the area of intrinsically biocompatible polymer systems. Polymeric biomaterials are presently used as, for example, long-term implantable medical devices, degradable implantable systems, transient invasive intravascular devices, and, recently, as tissue engineering scaffolds. This Special Issue welcomes full papers and short communications highlighting the aspects of the current trends in the area of intrinsically biocompatible polymer systems.

Keywords

antimicrobial peptides --- biodegradable polymers --- biocompatible polymers --- drug delivery systems --- controlled release --- citropin --- temporin --- ionic liquids --- chitooligosaccharide --- polyurethane --- biodegradability --- physicochemical properties --- hemocompatibility --- biological activity --- crosslinking --- drug delivery --- cosmetic --- food-supplement --- functionalization --- hyaluronan applications --- hyaluronan derivatives --- hyaluronan synthases --- hyaluronic acid --- hyaluronidases --- physico-chemical properties --- cyclohexanone --- ?-butyrolactone --- chloroform --- extraction --- polyhydroxyalkanoates --- PHB --- electrospraying --- biodegradable nano/microparticles --- drug delivery --- septic arthritis --- release characteristics --- biopolymers --- silk fibroin --- konjac glucomannan --- porous beads --- scaffolds --- tissue engineering --- microcarriers --- Poly (l-lactic) acid --- Chitosan --- nanohydroxyapatite --- osteoblasts --- ion-releasing materials --- shrinkage stress --- water sorption --- hydroscopic expansion --- photoelastic investigation --- enzymatic polymerization --- chemical polymerization --- poly(benzyl malate) --- biocompatible nanoparticles --- cell uptake --- cytotoxicity --- HepaRG cells --- human macrophages --- star polymers --- solution behavior --- ATRP --- SPION --- contrast agent --- MRI --- cancer diagnosis --- folate receptor --- pluronic F127 --- polylactide --- hydrolytic degradation --- mechanical properties --- PEEK copolymer synthesis --- PEEK composite --- Spine cage application --- In vitro biosafety --- degradation --- saliva --- mechanical properties --- molecular weight --- thermal properties --- activation energy of thermal decomposition --- anterior cruciate ligament reconstruction --- bone tunnel enlargement --- X-ray microtomography --- polylactide --- n/a

Bio-Based Polymers for Engineered Green Materials

Authors: ---
ISBN: 9783039289257 / 9783039289264 Year: Pages: 568 DOI: 10.3390/books978-3-03928-926-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-06-09 16:38:57
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With daily signals, Nature is communicating us that its unconscious wicked exploitation is no more sustainable. Our socio-economic system focuses on production increasing without considering the consequences. We are intoxicating ourselves on a daily bases just to allow the system to perpetuate itself. The time to switch into more natural solutions is come and the scientific community is ready to offer more natural product with comparable performance then the market products we are used to deal with. This book collects a broad set of scientific examples in which research groups from all over the world, aim to replace fossil fuel-based solutions with biomass derived materials. In here, some of the most innovative developments in the field of bio-materials are reported considering topics which goes from biomass valorization to the synthesis of high preforming bio-based materials.

Keywords

thermoplastic starch --- corn starch --- chitosan --- crosslinked microparticles --- lignin-containing cellulose nanofibrils --- poly(lactic acid) and composite films --- lignin content --- compatibility --- adsorption --- phenanthrene --- pyrene --- benzoyl cellulose --- stearoyl cellulose --- silkworm cocoons --- dense structure --- porosity --- robust fiber network --- mechanical properties --- photodegradation --- liquid natural rubber --- UV light --- TiO2 anatase --- latex state --- wood modification --- alkali lignin --- water resistance --- dimensional stability --- heat treatment --- polymeric composites --- antifouling --- metal binding --- iron chelation --- polydopamine coating --- free-radical polymerization --- galactoglucomannan --- lignin --- lignin-carbohydrate complex --- ultrafiltration --- precipitation --- hydrogel --- recycling --- thermal degradation --- mechanical degradation --- polylactic acid --- Bioflex --- Solanyl --- PHBV --- poly(lactic acid) --- pulp fibers --- biocomposite --- emulsion-solvent evaporation method --- films --- mechanical properties --- PHA --- mixed microbial cultures --- bioplastics --- feast-famine --- cost --- Peptone --- Microbial nutrient --- Anti-bacterial silver nanoparticle --- Escherichia coli --- Staphylococcus aureus --- tannin --- hemicellulose --- waste biomass --- HSQC-NMR --- pyrolysis mechanism --- hydrotropic treatment --- metal chloride --- delignification --- enzymatic saccharification --- lignocellulosic nanofibrils --- microencapsulated phase change material (MPCM) --- polylactic acid (PLA) --- toughening --- endothermic effect --- kenaf fiber --- hybrid composites --- bio-based --- film --- mechanical properties --- polysaccharides --- resource recovery --- solution casting --- orange waste --- nanocelluloses --- cellulose nanofibers --- cellulose nanocrystals --- bacterial cellulose --- cement --- fiber-cement --- Hatscheck process --- bio-inspired interfaces --- mechanical properties --- thermal stability --- sensitivity --- electrospinning --- tissue engineering --- paper-based scaffolds --- osteoblast proliferation --- polycaprolactone --- biopolymers --- nanoclays --- nanobiocomposites --- extrusion-compounding --- polyhydroxyalkanoates --- thermal properties --- mechanical properties --- differential scanning calorimetry --- nuclear magnetic resonance --- X-ray diffraction --- transparent wood --- chemical composition --- H2O2 bleaching treatment --- physicochemical properties --- cellulose --- electrical resistance --- copper coating --- electroless deposition --- humidity sensor --- strain sensor --- lyocell fiber --- asphalt rubber --- bio-asphalt --- mixing sequence --- workability --- storage stability --- tung oil --- unsaturated polyester resins --- thermosetting polymers --- structure–property relationship --- structural plastics --- ONP fibers --- silanization --- composites --- mechanical properties --- Artemisia vulgaris --- microcellulose fiber --- nanocellulose fibers --- natural fibers --- Bio-based foams --- wastewater treatments --- cationic dyes --- anionic surfactants --- pollutant adsorbents --- tannin polymer --- tannin-furanic foam --- biopolymers --- nanoclays --- bio-nanocomposites --- extrusion-compounding --- polyhydroxyalkanoates --- thermal properties --- microstructure --- volatiles --- autoxidation --- thermal gravimetric analysis --- scanning electron microscope --- headspace solid phase microextraction --- alginate sponge --- two-step lyophilization --- methylene blue --- adsorption capacity --- biomass resources --- hybrid nonisocyanate polyurethane --- solvent- and catalyst-free --- dimer acid --- melt condensation --- bacterial cellulose --- surface modification --- TEMPO oxidation --- one-pot synthesis --- immobilized TEMPO --- physical property --- skincare --- cellulose --- graphene oxide --- ionic liquid --- membrane --- transport properties --- heavy metals --- porous structure --- SAXS --- WAXS --- cellulose --- wood --- lignocellulose --- ionic liquid --- imidazolium --- fractionation --- dissolution --- GC-MS --- kaempferol --- knotwood --- larixol --- taxifolin --- vibrational spectroscopy --- n/a

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