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Topic Review
Reaction Mechanism of CO2 Methanation
The combustion of fossil fuels has led to a large amount of carbon dioxide emissions and increased greenhouse effect. Methanation of carbon dioxide can not only mitigate the greenhouse effect, but also utilize the hydrogen generated by renewable electricity such as wind, solar, tidal energy, and others, which could ameliorate the energy crisis to some extent. Highly efficient catalysts and processes are important to make CO2 methanation practical. Although noble metal catalysts exhibit higher catalytic activity and CH4 selectivity at low temperature, their large-scale industrial applications are limited by the high costs. Ni-based catalysts have attracted extensive attention due to their high activity, low cost, and abundance. At the same time, it is of great importance to study the mechanism of CO2 methanation on Ni-based catalysts in designing high-activity and stability catalysts.
  • 2.7K
  • 07 Mar 2022
Topic Review
Adhesives and Adhesion Mechanism
Adhesives are a preferred choice for binding solid wood and wood composites based on wood strips, chips, fibers, strands, and veneer for manufacturing engineered wood products (EWPs), such as laminated veneer lumber (LVL), laminated strand lumber (LSL), oriented strand board (OSB), cross-laminated timber (CLT), plywood, particle board, medium density fiberboard (MDF), and high-density fiberboard.
  • 1.3K
  • 07 Mar 2022
Topic Review
Durability Performance of Geopolymer Concrete
Geopolymer concrete is produced from the geopolymerization process, in which molecules known as oligomers integrate to form geopolymer networks with covalent bonding. Its production expends less thermal energy and results in a smaller carbon footprint compared to Ordinary Portland Cement (OPC) concrete. It requires only an alkaline activator to catalyze its aluminosilicate sources such as metakaolin and fly ash, to yield geopolymer binder for the geopolymerization to take place. Because of its eco-friendly technology and practical application, current research interest is mainly concentrated on the endurance of geopolymer concrete to resist heat and chemical aggressions. 
  • 1.3K
  • 07 Mar 2022
Topic Review
Methanol to Gasoline (MTG)
The MTG (Methanol to Gasoline) process allows us to transform methanol into hydrocarbons within the range of gasoline boiling points.
  • 2.0K
  • 04 Mar 2022
Topic Review
Ultrafast Phase Transitions in (001) Si
Researchers demonstrate an ultrafast (<0.1 ps) reversible phase transition in silicon (Si) under ultrafast pressure loading using molecular dynamics. Si changes its structure from cubic diamond to β-Sn on the shock-wave front. The phase transition occurs when the shock-wave pressure exceeds 11 GPa. 
  • 395
  • 04 Mar 2022
Topic Review
Additive Biomanufacturing with Collagen Inks
Collagen is a natural polymer found abundantly in the extracellular matrix (ECM). It is easily extracted from a variety of sources and exhibits excellent biological properties such as biocompatibility and weak antigenicity. Additionally, different processes allow control of physical and chemical properties such as mechanical stiffness, viscosity and biodegradability. Moreover, various additive biomanufacturing technology has enabled layer-by-layer construction of complex structures to support biological function. Additive biomanufacturing has expanded the use of collagen biomaterial in various regenerative medicine and disease modelling application (e.g., skin, bone and cornea). 
  • 1.3K
  • 04 Mar 2022
Topic Review
Protein–Polysaccharide Complexes (Conjugates) as Delivery Systems
Due to their combination of featured properties, protein and polysaccharide-based carriers show promising potential in food bioactive ingredient encapsulation, protection, and delivery. The common types of protein–polysaccharide complex/conjugate-based bioactive ingredient delivery systems include emulsion (conventional emulsion, nanoemulsion, multiple emulsion, multilayered emulsion, and Pickering emulsion), microcapsule, hydrogel, and nanoparticle-based delivery systems. This entry highlights the applications of protein–polysaccharide-based delivery vehicles in common bioactive ingredients including polyphenols, food proteins, bioactive peptides, carotenoids, vitamins, and minerals. The loaded food bioactive ingredients exhibited enhanced physicochemical stability, bioaccessibility, and sustained release in simulated gastrointestinal digestion. 
  • 1.1K
  • 04 Mar 2022
Topic Review
Halide Segregation in Mixed Halide Perovskites
Metal halide perovskites (MHPs) has splendid optoelectronic properties and ease of processing, enabling efficiently fabricating high-performance photovoltaic devices with low-cost. MHPs are easy preparation and processing, but also face inherent instability issues, such as ion migration, halide segregation, phase transition and degradation.
  • 608
  • 04 Mar 2022
Topic Review
Electrospun Coaxial Fibers
Electrospinning is a common method for fabricating drug-loaded fibers. The working fluid is gradually stretched into elongated solid fibers with the help of electrostatic force. Due to the influence of polymers, solvents, and other external conditions, the diameter of fibers usually varies from tens of nanometers to several micrometers. During this process, the drug is immobilized on the homogeneous fiber without destroying its own active molecular structure. Electrospun fibers have several advantages over other drug delivery systems. The high specific surface area of ​​fibers facilitates drug dissolution. The desired drug dissolution process can be tailored according to the composition and structure of the fibers, thereby manipulating the controlled dissolution of the drug.
  • 493
  • 04 Mar 2022
Topic Review
Polyhydroxyalkanoates (PHAs) as Biomaterials in Tissue Engineering
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible biopolymers. These biomaterials have grown in importance in the fields of tissue engineering and tissue reconstruction for structural applications where tissue morphology is critical, such as bone, cartilage, blood vessels, and skin, among others. Furthermore, they can be used to accelerate the regeneration in combination with drugs, as drug delivery systems, thus reducing microbial infections. When cells are cultured under stress conditions, a wide variety of microorganisms produce them as a store of intracellular energy in the form of homo- and copolymers of [R]—hydroxyalkanoic acids, depending on the carbon source used for microorganism growth. 
  • 762
  • 03 Mar 2022
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