📄 chemistry

Development of a simple and affordable TLC-UV/Vis spectrophotometric method for the determination of branched-chain amino acids in dietary supplements

This study presents a low-cost, accessible TLC-UV/Vis spectrophotometric method for screening the total content and relative proportions of branched-chain amino acids in dietary supplements, offering a viable alternative for routine quality control despite its inability to fully replace reference chromatographic techniques.

Malco Bracco¹, Abril María Espinosa¹, Federico Martín Portilla¹, Pablo Raúl Castello¹2026-07-14✓ Author reviewed
📄 chemistry

Novel Pt,Ru-Codoped In₂S₃/Ta₂O₅ heterostructured films for the effective enhancement of visible-light photocatalytic degradation of rhodamine B

This study demonstrates that Pt,Ru-codoped In₂S₃/Ta₂O₅ heterostructured films, optimized with 75 wt.% In₂S₃ and fabricated via hydrothermal and doctor blading methods, achieve 92.0% visible-light degradation of Rhodamine B within 120 minutes by leveraging narrow bandgap absorption, oxygen vacancies, and strong electronic interactions to enhance charge separation and superoxide radical generation.

Natkritta Boonprakob, Natthakit Huatong, Narong Chanlek, Kemawadee Udonpan, Chaiyuth Sae-Kung, Chen Zhao2026-07-14
📄 chemistry

Application of Different Drying Techniques on the Chemical Composition and Antimicrobial Activities of the lemon verbena (Lippia Citrioodora Kunth palau) Essential Oil

This study demonstrates that microwave drying at 300W yields lemon verbena essential oil with the highest concentration of secondary metabolites and diverse bioactive compounds, while oven drying at 30°C produces the strongest antimicrobial activity against *Streptococcus pyogenes*, highlighting the significant influence of drying techniques on the oil's chemical profile and pharmaceutical potential.

Saemeh Rahdari, Maryam Rahimi, Zeynab Mohkami, Ali Ghorbani Ranjbari, Dariush Ramezan2026-07-14
📄 chemistry

Surrogate-Free Inverse Design of High-IP/High-EA Polyimide Constitutional Repeating Units with In-Loop Semiempirical Quantum Scoring

This study presents a surrogate-free inverse-design workflow combining recurrent-neural-network-guided Monte Carlo Tree Search with in-loop GFN2-xTB scoring to successfully generate a library of polyimide constitutional repeating units that simultaneously achieve deep ionization potentials and large electron affinities, overcoming the typical trade-off between these properties.

Yingda Li, Rong Sun, Jibao Lu2026-07-14
📄 chemistry

Preparation of tetra-branched PEG network and its application to gel polymer electrolyte

This paper reports the synthesis of a gel polymer electrolyte with a tetra-branched network structure via a thiol-yne click reaction, demonstrating that its ionic conductivity is influenced by polymer content and PEG chain length, which facilitates lithium cation transport along the polymer chains in addition to the electrolyte solution.

Tomoya Enoki, Ryodai Kagami, Takahiro Uno, Nanami Sasaki, Nobuyuki Imanishi, Masataka Kubo2026-07-14
📄 chemistry

3D Cerium Doped In₂S₃ Immobilised Hydrogel for Efficient Photocatalytic Sulphamethoxazole Degradation And H₂O₂ Production-Mechanistic Insights and Applications

This study demonstrates that a 3D cerium-doped indium sulfide hydrogel photocatalyst effectively degrades sulfamethoxazole (up to 91% efficiency) and simultaneously produces hydrogen peroxide under visible light by leveraging improved charge separation, a reduced band gap, and hydroxyl radical generation.

HRITANKHI TRIPATHY, ABHIJEET SAHOO, ARVIND KUMAR2026-07-14
📄 chemistry

Formation charging reveals hidden manufacturing defects in lithium-ion batteries

This study demonstrates that a unified formation-stage charge-acceptance partitioning index can effectively detect diverse lithium-ion battery manufacturing defects by capturing their common convergence on reduced charge acceptance, offering a simple and low-cost alternative to complex, defect-specific screening methods.

Rui Xiong, Wei Chen, Ying Li, Jinpeng Tian, Xuyi Shan, Kang Li, Fangfang Pan, Hong Li2026-07-14
📄 chemistry

Rougher flotation of copper flotation tailings from southern Peru: Fe upgrading, metallurgical balance and batch flotation kinetics

This study demonstrates that bench-scale rougher flotation of copper tailings from southern Peru can effectively upgrade iron content to approximately 50.8 wt.% with a recovery of 58.3%, achieving a reproducible baseline for Fe recovery while noting that the absence of specific sulfur and mineralogical data prevents confirmation of pyrite recovery or environmental desulfurization.

Kenny Salazar2026-07-14