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Agricultural wastes --- Research --- Recycling --- Agricultural Waste and Byproduct Utilization National Program (U.S.) --- United States.

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Les surfactants sont des molécules présentes dans notre quotidien. Que ce soient les produits cosmétiques, les produits d’entretien ou même la nourriture, les surfactants peuvent être utilisés dans la formulation de tous ces exemples. Cependant, la majeure partie des surfactants sont produits de manière chimique, seulement 4 % du marché est représenté par des molécules alternatives entièrement bio basée appelées « biosurfactant ». Les lipopeptides, des molécules composées d’une partie lipidique et d’une partie peptidique, font partie de ces biosurfactants. Ces lipopeptides sont produits par différents microorganismes dont des bactéries du genre Bacillus.
Ce travail s’inscrit dans le cadre d’un projet européen nommé SURFs UP visant à produire de nouveaux biosurfactants qui remplaceront les surfactants d’origine chimique. L’objectif de ce projet n’est pas seulement de produire des biosurfactants mais de les produire de manière plus responsable. Pour cela, des co-produits provenant de diverses entreprises ont été utilisés afin de valoriser ces matières considérées comme des co-produits tout en diminuant les coûts de matière première afin de concurrencer les surfactants chimiques.
L’optimisation de la production d’un lipopeptide, la lichénysine, par Bacillus licheniformis a été investigué. La première partié était l’optimisation du milieu. Cette étape a consisté à étudier la production de lichénysine par différentes souches de Bacillus licheniformis tout en modifiant le milieu de culture afin de maximiser la productivité. La deuxième partie a été l’utilisation de co-produits provenant de l’industrie du bois. Pour ce faire, des milieux ont été développés à partir de ces coproduits et la production de lichénysine par Bacillus licheniformis y a été explorée. Une troisième partie a été de réalisé des tests sur la croissance de Bacillus licheniformis ainsi que sur la production de lichénysine en milieu anaérobie. La quatrième et dernière partie a eu comme thématique l’édition génomique de Bacillus licheniformis afin de rendre la souche incapable de sporuler et permettre une culture en fermenteur tout en minimisant les risques de contaminations d’un batch à l’autre. Surfactants are molecules that we frequently use in our daily live. Whether it is in cosmetics, in cleaning products or even in food, surfactants can be used in the formulation if all these examples. However, the majority of surfactants are produced chemically, with only 4% of the market represented by entirely bio-based alternative molecules known as “biosurfactant”. Lipopeptides are molecules composed of a lipid part and a peptide part and belong to these biosurfactants. These lipopeptides are produced by various microorganisms, including bacteria of the Bacillus species. 
This work is part of a European project called SURFs UP aiming at producing new biosurfactants to replace chemical surfactants. The goal of this project is not only to produce biosurfactants but to produce them in a more sustainable way. To achieve this, co-products from various companies have been used to add value to these materials, which are considered as by-products, while at the same time reducing raw material costs to compete with chemical surfactants.
The optimization of lipopeptide production, specifically lichenysin, by Bacillus licheniformis was investigated. The first part focused on medium optimization, which involved studying lichenysin production by various Bacillus licheniformis strains while modifying the culture medium to maximize productivity. The second part explored the use of by-products from the wood industry. For this purpose, culture media were developed using these by-products, and the production of lichenysin by Bacillus licheniformis in these media was examined. The third part involved conducting tests on the growth of Bacillus licheniformis as well as lichenysin production under anaerobic conditions. The fourth and final part focused on the genome editing of Bacillus licheniformis to make the strain incapable of sporulation, enabling fermentation culture while minimizing contamination risks between batches.

Lipopeptides --- lichénysine --- co-produit --- matière première --- bois --- extrait de plume --- Bacillus --- Bacillus licheniformis --- optimisation --- milieu --- design expérimental --- lichenysin --- byproduct --- feedstock --- wood --- feather meal --- optimization --- medium --- experimental design --- Sciences du vivant > Biotechnologie --- Sciences du vivant > Microbiologie

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The main aim of this Special Issue is to provide an overview of recent advances in the processing, characterization, structure–activity links, and applications of natural bioactive molecules from a wide range of sources. The incorporation of these bioactive compounds in innovative functional matrices is also a matter of interest.

anti-hypertension --- bioactivity --- Gaba --- Gaba-rich product --- health benefit --- Nibea japonica --- marine collagen peptides --- proliferation --- wound healing --- processing by-products --- Meretrix meretrix oligopeptides --- cyclophosphamide --- immunomodulatory --- immune-deficient mice --- Cytisus scoparius --- Pleurotus ostreatus --- Brassica rapa --- Quercus robur --- sun creams --- thermal spring waters --- fermentation --- fermented foods --- whole grains --- health benefits --- phenolic compounds --- antioxidant activity --- bee products --- bioactive molecules --- cosmetics --- emulsion --- functional matrices --- honey --- hydration --- organoleptic properties --- transepidermal water loss --- bioactive peptides --- in vitro gastrointestinal digestion --- fish byproduct hydrolysate --- cholecystokinin --- glucagon-like peptide 1 --- DPP-IV inhibitory peptides --- Taxus baccata L. red arils --- polymethylene-interrupted fatty acids --- α-linolenic acid --- nutritional value --- amino acids --- elements

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The focus of this Special Issue was on biomass ash valorization with respect to their potential for various material applications. Most of the publications in this Special Issue focused on the production of biogenic silica with different properties. Additionally, some of the publications considered application of biomass ashes and biochar as a fertilizer, for soil amendment and recovery of ash forming elements such as N and P, as well as the application of biomass feedstocks in biofuel production.Accordingly, ashes produced from the thermochemical conversion of agricultural residues have high potential to be utilized for different material applications. However, local availability, as well as scaling up the process and life-cycle assessment should be considered prior to the utilization of these materials. Furthermore, densification as a mechanical pre-treatment can be crucial to improve the fuel properties, while purification of some of the ash forming elements, such as calcium, potassium, and prosperous should also not be disregarded in future investigations.

rice husk --- rice husk ash --- silica --- engineered particle --- bottom-up process --- silica extraction --- valorization --- agricultural byproduct --- sustainable material --- biomass --- renewable material --- biogenic amorphous silica --- green chemistry --- maize leaves --- sugarcane fiber --- sugarcane leaves --- sugarcane pith --- biorefinery --- multi-objectives RSM --- nano-silica --- de-ashing --- cellulose crystals --- carbon nanotubes --- cellulose --- sugarcane bagasse --- capacitance --- maize straw --- acid leaching --- ash --- pyrolysis --- nitrogen conversion --- wood ash --- fertilizer --- heat and power plants --- heavy metals --- nutrients --- German fertilizer legislation --- alkaline leaching --- continuous process --- bio-based material --- waste --- exhausted grape marc --- biochar --- soil amendment --- biogas --- lifecycle assessment --- greenhouse gas emissions --- mitigation potential --- GHG mitigation costs --- manure --- biomethane --- RED II --- EU ETS --- smoldering --- high moisture content --- specific surface area --- rice straw --- nanosilica --- methylene blue --- zero waste generation --- decolorization --- SDGs --- municipal sewage sludge --- energy recovery --- phosphorus recovery --- techno-economic analysis --- mono-combustion --- co-combustion --- n/a

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Natural polymers are already used for a variety of biomedical applications, including drug delivery, wound healing, tissue engineering, biosensors, etc. However, they have also found other applications, for example, in the food industry, the pharmaceutical industry, as firefighting materials, water purification, etc. Different polysaccharide and protein-based systems have been developed. They each have their properties that render them useful for certain applications such as the water solubility of alginate, the thermo-sensitivity of chitosan, the abundance of cellulose and starch, or the cell adhesion and proliferation of gelatin and collagen. This Special Issue will explore the design, synthesis, processing, characterization, and applications of new functional natural-based polymers.

Research & information: general --- Biology, life sciences --- Biochemistry --- light conversion film --- cellulose acetate --- europium --- sensitization --- X-ray photoelectron spectroscopy --- surface plasmon resonance --- thin film --- quantum dot --- 4-(2-pyridylazo)resorcinol --- chitosan --- graphene oxide --- 3D printing --- carboxymethyl cellulose --- hydrogel --- lyophilization --- dissolution --- release model --- customization --- NO-donor --- topical release --- polymeric matrices --- microbial infections --- wound healing --- blood circulation --- semisynthetic polymers --- natural rubber --- rice husk ash --- alginate --- mechanical properties --- dielectric properties --- nanohydrogel --- food applications --- biopolymers --- polysaccharide --- neural network --- chicken feet --- sensorial quality --- food quality --- gelatine --- hyaluronic acid --- polyethylene oxide --- electrospinning --- nanofibers --- wound dressings --- pectin --- pectinase --- wheat bran --- banana peel --- Bacillus amyloliquefaciens --- prebiotics --- mucilage --- pectin polysaccharide --- Opuntia ficus-indica --- aloe vera --- acemannan --- Cactaceae --- Asphodelaceae --- porcine gastric mucin --- methacryloyl mucin --- double-cross-linked networks --- circular dichroism --- mechanical characterization --- date palm trunk mesh --- cellulose --- lignocellulosic waste --- alpha cellulose --- nanocellulose --- agro-byproduct --- Bacillus licheniformis --- bioconversion --- pomelo albedo --- sucrolytic --- lubricant --- tribology --- albumin deposition --- contact lens --- surface roughness --- bio-based polyurethanes --- prepolymers --- cellulose-derived polyol --- cellulose-citrate --- polyurethane composites --- poly(lactic acid) --- nanocomposites --- tannin --- lignin --- thermal degradation kinetics --- decomposition mechanism --- pyrolysis --- nanocomposite --- nanofertilizer --- slow release --- ammonia oxidase gene --- quantitative polymerase chain reaction --- microflora N cycle --- nutrient use efficiency --- soil N content --- aerogels --- cold plasma coating --- hydrophobization --- pore structure --- chitinous fishery wastes --- chitinase --- crab shells --- Paenibacillus --- N-acetyl-D-glucosamine --- phenol --- adhesive hydrogels --- nanomaterials --- surface modification --- latex --- lignocellulosic fibers --- conventional fillers --- CNC --- esterification reaction --- graft copolymerization --- hydrophobic modification --- flocculant --- crosslinking --- peptides --- glutaraldehyde --- specified risk materials --- laccase --- melanin --- decolorization --- natural mediators --- glycerol --- polymer electrolyte --- ionic conductivity --- biochemistry --- pH and rumen temperature --- protozoa --- zero valent iron --- nanoparticles --- ethylene glycol --- methylene blue --- polyhydroxyalkanoates --- poly(3-hydroxybutyrate-co-3-hydroxyhexanoate --- melt processing --- extrusion --- injection molding --- elongation at break --- crystallization --- DoE --- oil palm biomass waste --- anionic hydrogel --- swelling --- salt crosslinking agent --- CoNi nanocomposite --- cellulose paper --- antibacterial potential --- degradation --- annealing --- acetylation --- potato starch --- emulsion capacity --- FTIR --- Malva parviflora --- natural polymers --- physicochemical properties --- rheology --- birch wood --- pre-treatment --- process parameter --- lignocellulose --- 2-furaldehyde --- Komagataeibacter --- stretchable bacterial cellulose --- enhanced strain --- vitamin C --- collagen --- anisotropy --- electron irradiation --- tensile test --- activated carbon --- MnO2 --- Co NPs --- antibacterial activity --- hydrogels --- antimicrobial activities --- functionalized materials --- cellulose derivatives --- flexor tendon repair --- anti-inflammatory --- anti-adhesion --- antimicrobial --- polymer-based constructs --- biosorbent --- copper --- adsorption --- model studies --- aqueous medium --- biodegradable polymers --- chemical modification --- food packaging --- free radical polymerization --- superabsorbent --- water-retaining agent --- thermal properties --- Mimosa pudica mucilage --- extraction optimization --- Box-Behnken design --- response surface methodology --- pH-responsive on–off switching --- zero-order release --- antimicrobial activity --- bacterial cellulose --- cytotoxicity --- nisin --- stability