The dynamic covalent chemistry associated with imine formation42,43,44,45, which involves aldehyde and amine precursors, is highly accessible synthetically and environmentally friendly. The labile nature of imine in the presence of water implies that it is not amenable to use in aqueous media. In ...
In conclusion, we have demonstrated the employment of chiral Rh(I) catalysis synergistically with boronic acid catalysis in site-selective carbohydrate functionalizations,81 surmounting the challenge of multiple regio-, diastereo-, enantio- and anomeric control within a single bond-forming step. Thus, ...
The degradation of curcumin mainly involves: (a) the reduction of its olefin and carbonyl moieties; (b) the retro-aldol mediated cleavage of its β-diketone core, catalyzed by several aldo–keto reductases; (c) its reaction with glutathione by a Michael addition; (d) the conjugation of its...
Its purpose in this field is to reduce the flammability of these materials and prevent the spread of fire. The mechanism of action involves the formation of a protective char layer when exposed to heat, which acts as a barrier and delays the ignition and combustion process. Polymer Additive:...
The current material design approach is known as a forward “function follows form” approach, which involves using the three-class descriptors of a material (atomic identity, composition and structure, or ACS) as input to derive the ensuing material properties. On the contrary, in inverse design...
of PE involves use of microbes or microbial communities that modify and consume the polymer as a source of energy leading to changes in its physico-chemical properties such as weight loss, structural deterioration, and eventually carbon fixation as a biomass [86,97]. However, the formation of ...
Similar to the esterification of cellulose, the acylation of cellulose is also modified by introducing ester groups to the cellulose and the acylation reaction is most commonly performed in organic solvents. At present, the acylation of cellulose most commonly involves carbonylation (acetylation and form...
a single covalent bond b. a double covalent bond c. a triple covalent bond d. an ionic bond e. a magnetic dipole bond Any water molecule has the ability to form hydrogen bonds with other water molecules. What type of chemical bond...
Single amino acid change in PvdD(A1) lead to the production of PVD analogs We built a set of mutants at position Phe191 and His299 from the parent strainP. aeruginosaPaM1 [36], and directly monitored the impact of the mutations on the PVD produced. Three mutants were constructed at the...
Ionic bondsform when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. ... A covalent bond involves a pair of electrons being shared between atoms. Atoms form covalent bonds in order to reach a more stable state. ...