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It is well recognized that the aging process is a critical step in winemaking because it induces substantial chemical changes linked to the organoleptic properties and stability of the finished wines. Therefore, this study aimed to investigate the influence of different types, utilization times, and volumes of aging barrels on the metabolite profile of red wines, produced from Thai-grown Shiraz grapes, using a non-targeted proton nuclear magnetic resonance (1H-NMR) metabolomics approach. As a result, 37 non-volatile polar metabolites including alcohols, amino acids, organic acids, carbohydrates and low-molecular-weight phenolics were identified. Chemometric analysis allowed the discrimination of wine metabolite profiles associated with different types of aging containers (oak barrels vs. stainless-steel tanks), as well as the utilization times (2, 6 and >10 years old) and volumes (225, 500 and 2000 L) of the wooden barrels employed. Significant variations in the concentration of formate, fumarate, pyruvate, succinate, citrate, gallate, acetate, tyrosine, phenylalanine, histidine, Îł-aminobutyrate, methionine and choline were statistically suggested as indicators accountable for the discrimination of samples aged under different conditions. These feature biomarkers could be applied to manipulate the use of aging containers to achieve the desired wine maturation profiles.
The recent nanomedicine advancements have introduced a variety of smart nanoparticles in cancer treatment and diagnostics. However, their application to the clinic is still hindered by several challenges related to their biocompatibility, elimination and biodistribution. Here we propose breakable organosilica mesop
Protein cages and virus-like particles are often thought of as highly uniform structures that obey strict geometric rules for self-assembly. Yet, there is a growing number of examples where different architectures can emerge from the same native cage system through minor changes in experimental conditions or
Clathratesâopen crystals with a hierarchy of polyhedral cagesâare mostly found in atomic and molecular systems. Now, it has been shown through Monte Carlo simulations that the formation of colloidal hostâguest clathrates can be driven by entropy alone, through entropy compartmentalization.
Colloidal clathrate crystals self-assembled from hard polyhedral shapes in computer simulations are stabilized by entropy compartmentalization, whereby hosts and guests contribute unequally to the entropy. This creative solution to satisfying the laws of thermodynamics suggests new ways to make colloidal crystals with open cages and hierarchical hostâguest structures.
Compartmentalization of cellular activities is an extremely important mechanism within cells, across all domains of life, for high efficiency of cell function. Bacterial microcompartments are exemplary protein-based cage structures that act as subcellular compartments encapsulating biocatalysts. They are able to ac