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In order to achieve zero net emissions to limit the effects of climate change, a key sector that need decarbonising is transport. One idea is to use hydrogen-powered technologies. For example, Coexpair, a company specialised in composite materials, is interested in developing hydrogen tanks made of composite materials for the automotive and aeronautical sectors. To develop such a tank, it is important to have an idea of the certification process to be followed. It is essential to know the regulatory framework for the certification of hydrogen tanks. The lack of knowledge of the regulatory framework and the difficulty in navigating the regulations, codes and standards (RCS) is a significant barrier to market entry and the development of tank supply chains. Thus, in order to gain knowledge of the regulatory framework that applies to gaseous and liquid hydrogen tanks, a study on the certification process was performed. This study starts with the compilation of the different RCS that apply to both types of tanks. It continues with the compilation of the compliance and risk matrices for both tanks. The study then outlines the development plan for each tank and the associated development schedule. It concludes with the budget forecast estimates for developing the full-size gaseous and liquid hydrogen tanks to an approved prototype design. This report also proposes a general tank approval process for Type 5 hydrogen containers for the automotive sector and liquid hydrogen containers for the aeronautical sector.

Certification --- Quality --- LH2 Tanks --- GH2 Tanks --- Aeronautics --- Ground Transport --- Compliance Matrix --- Risk Matrix --- Development Plan --- Development Schedule --- Budget Forecast --- Ingénierie, informatique & technologie > Ingénierie mécanique

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Carbohydrate-active enzymes are responsible for both biosynthesis and the breakdown of carbohydrates and glycoconjugates. They are involved in many metabolic pathways; in the biosynthesis and degradation of various biomolecules, such as bacterial exopolysaccharides, starch, cellulose and lignin; and in the glycosylation of proteins and lipids. Carbohydrate-active enzymes are classified into glycoside hydrolases, glycosyltransferases, polysaccharide lyases, carbohydrate esterases, and enzymes with auxiliary activities (CAZy database, www.cazy.org). Glycosyltransferases synthesize a huge variety of complex carbohydrates with different degrees of polymerization, moieties and branching. On the other hand, complex carbohydrate breakdown is carried out by glycoside hydrolases, polysaccharide lyases and carbohydrate esterases. Their interesting reactions have attracted the attention of researchers across scientific fields, ranging from basic research to biotechnology. Interest in carbohydrate-active enzymes is due not only to their ability to build and degrade biopolymers—which is highly relevant in biotechnology—but also because they are involved in bacterial biofilm formation, and in glycosylation of proteins and lipids, with important health implications. This book gathers new research results and reviews to broaden our understanding of carbohydrate-active enzymes, their mutants and their reaction products at the molecular level.

Research & information: general --- Biology, life sciences --- glycoside hydrolase --- xylanase --- carbohydrate-binding module --- CBM truncation --- halo-tolerant --- xylan hydrolysis --- pectate lyase --- Paenibacillus polymyxa --- pectins --- degradation --- Lactobacillus --- GH13_18 --- sucrose phosphorylase --- glycoside phosphorylase --- Ilumatobacter coccineus --- Thermoanaerobacterium thermosaccharolyticum --- crystallography --- galactosidase --- hydrolysis --- reaction mechanism --- complex structures --- cold-adapted --- GH2 --- Cellulase --- random mutagenesis --- cellulose degradation --- structural analysis --- α-amylase --- starch degradation --- biotechnology --- structure --- pyruvylation --- pyruvyltransferase --- exopolysaccharides --- capsular polysaccharides --- cell wall glycopolymers --- N-glycans --- lipopolysaccharides --- biosynthesis --- sequence space --- pyruvate analytics --- Nanopore sequencing --- ganoderic acid --- Bacillus thuringiensis --- biotransformation --- glycosyltransferase --- whole genome sequencing --- applied biocatalysis --- enzyme cascades --- chemoenzymatic synthesis --- sugar chemistry --- carbohydrate --- Leloir --- nucleotide --- Enzymatic glycosylation --- alkyl glycosides (AG)s --- Deep eutectic solvents (DES) --- Amy A --- alcoholysis --- methanol --- circular dichroism --- protein stability --- alpha-amylase --- biomass --- hemicellulose --- bioethanol --- xylanolytic enzyme --- hemicellulase --- lysozyme --- peptidoglycan cleavage --- avian gut GH22 --- crystal structure --- glycosylation --- UDP-glucose pyrophosphorylase --- UDP-glucose --- nucleotide donors --- Rhodococcus, Actinobacteria, gene redundancy --- Leloir glycosyltransferases --- activated sugar --- UTP --- thermophilic fungus --- β-glucosidases --- Chaetomium thermophilum --- protein structure --- fungal enzymes --- endo-α-(1→6)-d-mannase --- mannoside --- Mycobacterium --- lipomannan --- lipoarabinomannan --- phosphatidylinositol mannosides --- GH68 --- fructosyltransferase --- fructooligosaccharides --- FOS biosynthesis --- prebiotic oligosaccharides --- Arxula adeninivorans --- α-glucosidase --- maltose --- panose --- amylopectin --- glycogen --- inhibition by Tris --- transglycosylation --- glycoside hydrolyase --- Trichoderma harzianum --- complete saccharification --- lignocellulose --- N-acetylhexosamine specificity --- GH20 --- phylogenetic analysis --- NAG-oxazoline --- acceptor diversity --- lacto-N-triose II --- human milk oligosaccharides --- NMR --- molecular phylogeny --- α2,8-sialyltransferases --- polySia motifs --- evolution --- ST8Sia --- functional genomics