clomipramine hydrochloride + sildenafil citrate (Gusejeong / DKB22002 / DKB 22002)

Overlooked properties difference of biogenic sulfur resulting in distinct performance in serving as an electron donor for microbial denitrification.

Zhang N N, Yi G G, Ren R R, Zhang G G et al.

Biogenic sulfur (bio-S0) is recognized as a more efficient electron donor compared to its chemical counterpart in microbial denitrification. However, the performance differences among various types of bio-S0 remain poorly understood, posing a challenge in identifying the optimal variant. In this study, we comparatively investigated three distinct bio-S0 samples-bio-S0-A1 and bio-S0-A2, both obtained from single-reactor bio-S0 production processes with varying organic coating thicknesses, and bio-S0-B, sourced from a dual-reactor bio-S0 production process-alongside chemical sulfur (chem-S0) in terms of property characterization, denitrification performance, and microbial composition. Our results showed that bio-S0-B exhibited an elevated denitrification rate compared to the chem-S0, but was less effective than bio-S0-A1 and bio-S0-A2. This discrepancy could be attributed to the differing sulfur-related properties, such as polysulfane content and crystallinity. Regarding the other two bio-S0 samples (bio-S0-A1 and bio-S0-A2), our findings indicated that the organic coating negatively impacted denitrification performance. Inspired by this, we further demonstrated that bio-S0 can be optimized by destroying the organic coating, leading to an increase of up to 3.2-fold in denitrification rate. Variations of microbial composition were noted among different bio-S0 samples, with the relative abundance of Moheibacter showing a positive correlation with the denitrification rate. This study offers a property-based guideline for optimizing the selection of bio-S0 and further refining raw bio-S0 to enhance its effectiveness as an electron donor for denitrification.

CORR Insights®: Is a Resorbable Citrate-based Bioceramic Device Associated With Osseous Integration? An Early Retrospective MRI Analysis.

DeCoster Thomas A TA

Evaluation of the properties of gel, film and paper coated with nanocellulose and nanochitin.

Dehghani Firouzabadi Mohammadreza M, Bousfield Douglas D, Tajvidi Mehdi M

Bio-based nano-materials have great potential as films and as paper coatings to produce materials that are suitable for food packaging. However, more needs to be understood about the characteristics of the starting materials and how they influence the final film properties. The objective of this study was to comparatively investigate the structural, thermal, mechanical, rheological, and functional properties of nanocellulose and nanochitin films or gels and their application as bio-coatings for paper. The thermal behavior of nanocellulose and nanochitin samples was similar. The tensile strength and strain of the nanocellulose films were significantly higher than those of the nanochitin films. The viscosity of both nanocellulose and nanochitin gels decreased uniformly with increasing shear rate. The coating process was carried out at a speed of 5 cm/s for single-layer and double-layer coatings. Bio-coating of the paper with nanochitin significantly improved the barrier properties (resistance to water, air, and oil penetration). At similar coat weights, the nanochitin-coated papers always consistently exhibited a lower thickness than the nanocellulose-coated papers. The brightness of nanocellulose-coated papers was higher than that of nanochitin-coated papers. This study demonstrates the potential of these bio-based nanomaterials for sustainable and effective paper bio-coatings.

Structures of the human sodium-citrate cotransporter NaCT with and without substrates.

Sauer David B DB, Song Jinmei J, Marden Jennifer J JJ, Wang Bing B et al.

The human sodium-citrate cotransporter NaCT imports various tri- and dicarboxylates into the cell as TCA cycle intermediates. This substrate uptake process is driven by an inward sodium gradient. The protein is a member of the Divalent Anion-Sodium Symporter (DASS) family. Whereas extensive biochemical and structural studies have been carried out for NaCT, how the substrate binding and translocation is coupled to the sodium gradient remains unclear. Here using single particle cryo-electron microscopy, we determined the structures of the human NaCT protein in three states: sodium-free, in the presence of sodium, and sodium- and substrate-bound. These structures suggest a simultaneous binding mechanism for sodium-substrate coupling, distinct from the sequential binding, conformational selection mechanism previously observed for the bacterial DASS protein VcINDY.