Mechanistic insights into the co-transport of microplastic degradation products in saturated porous media: The key role of microplastics-derived DOM.

Microplastic-derived dissolved organic matter (MP-DOM) forms from the aging of microplastics (MPs), but the co-transport behavior of MP-DOM and aged MPs (AMPs) remains poorly understood. This study investigates the co-transport of AMPs and MP-DOM generated from original MPs (OMPs) over a wide range of environmentally relevant conditions. The transport of AMPs and MP-DOM changes as the degree of aging increases, specifically related to changes in their physicochemical characteristics.

Extraordinary Room-Temperature Tensile Ductility of Pure Magnesium.

Room-temperature tensile behavior and associated deformation mechanisms of multiple-axial forged (MAFed) pure Mg has been investigated. The as-MAFed Mg, with a coarsely recrystallized structure, exhibited a balanced strain-hardening behavior with strain, resulting in extraordinary mechanical properties with high ultimate stress (~200 MPa) and extensive true strain (~0.30).

[A Study on Preparation and Photocatalytic Activity of Mn-BiOCl].

Using Bi2O3 and MnC2 x 4H2O as raw materials, with HCl as solvent, photocatalysts of Mn-BiOCl with different molar ratio of Mn and Bi were prepared by a hydrolysis method. The obtained samples were characterized by XRD, HRTEM, TEM, UV-Vis DRS and SPS. The UV light photocatalytic activity of Mn-BiOCl was evaluated by using methyl orange as model compounds of photocatalytic reaction.

[Ssh10b2 differs from its paralogue Ssh10b in cellular abundance and the ability to constrain DNA supercoils].

The ssh10b and ssh10b2 genes, a pair of distantly related paralogues in Sulfolobus shibatae, encode members of the Sac10b DNA binding protein family in thermophilic archaea. It has been shown previously that Ssh10b exists in abundance in S. shibatae and is capable of constraining negative DNA supercoils, properties that are consistent with a speculated architectural role for the protein in chromosomal organization.

Modulation of hyperthermophilic DNA polymerase activity by archaeal chromatin proteins.

Sulfolobus synthesizes a large quantity of highly conserved 7-kDa DNA-binding proteins suspected to be involved in chromosomal organization. The effect of the 7-kDa proteins on the polymerization and 3'-5' exonuclease activities of a family B DNA polymerase (polB1) from the hyperthermophilic archaeon Sulfolobus solfataricus was investigated. polB1 degraded both single-stranded DNA and double-stranded DNA at similar rates in vitro at temperatures of physiological relevance.