Results 91 to 100 of about 64,444 (333)

Antimicrobial Polyethylene through Melt Compounding with Quaternary Ammonium Salts

International Journal of Polymer Science, 2017
Selected mono- and bicationic quats were compounded with polyethylene. The physicochemical surface properties, leaching behavior, and antibacterial activity of such modified samples were investigated.
Fernanda F. Rossetti, Konstantin Siegmann, Joachim Köser, Irene Wegner, Ismail Keskin, Götz Schlotterbeck, Martin Winkler   +6 more
doaj   +1 more source

'N-Stereogenic Quaternary Ammonium Salts' from L-Amino Acids: Synthesis, Separation, and Absolute Configuration

, 2009
Diastereoisomeric linear and cyclic 'N-chiral quaternary ammonium salts' (QASs) were efficiently synthesized from corresponding L-amino acids in high yields. The diastereoisomers of each pair of 'N-chiral QASs' were successfully separated.
Pan, XF, Chen, XZ, Lin, WB, Luo, YG, Zhang, GL, Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China., Wu, HF, Li, CY, Xia, LZ, Zhang, GL   +8 more
core  

Chiral Quaternary Ammonium Salts in Organocatalysis

, 2017
International audienceThe acceleration of a reaction by means of a substoichiometric amount of small chiral organic molecules emerged as a powerful asymmetric synthetic methodology during the early 2000s.
Vincent Levacher, Oudeyer, Sylvain, Jean-François Brière, Sylvain Oudeyer, Brière, Jean-François, Levacher, Vincent   +5 more
core   +1 more source

Harnessing Phase Separation for the Development of High‐Performance Hydrogels

Advanced Science, EarlyView.
ABSTRACT Hydrogels are indispensable for the development of next‐generation bioelectronics, soft robotics, and biomedical devices, where their mechanical properties determine performance and reliability. Among strategies to enhance hydrogel mechanics, phase separation enables controlled heterogeneity resulting in gel networks that are reinforced by ...
Yue Shao, Yiming Ma, Baihao Shao, Molly M. Stevens   +3 more
wiley   +1 more source

Enzymatic Basis for the Oxidative Branch of Aromatic Amino Acid Fermentation Leading to p‐cresol Formation

Advanced Science, EarlyView.
In anaerobic bacteria, tyrosine serves as an electron donor in the oxidative Stickland fermentation branch, generating p‐hydroxyphenylacetate, ATP and reduced ferredoxin for decarboxylation into p‐cresol. ABSTRACT The phenolic metabolite p‐cresol is a byproduct of tyrosine fermentation by certain strictly anaerobic bacteria, including the human gut ...
Li Jiang, Yifeng Wei, Xumei Liu, Dazhi Liu, Zhenyu Liu, Yang Tong, Jinyu Yin, Ankanahalli N. Nanjaraj Urs, Meining Xing, Mark A. Harrison, Chuyuan Zhang, Sheng Yang, Yunzi Luo, Ee Lui Ang, Huimin Zhao, Yan Zhang   +15 more
wiley   +1 more source

Nanocurvature‐Activated Dipolar Polarization in M–N4 Single‐Atom Sites for High‐Performance Electromagnetic Wave Absorption

Advanced Science, EarlyView.
Increasing nanocurvature effectively enriches the local electron density of the M–N4 motif, which facilitates electron transfer from the metal center to nitrogen atoms. This electronic behavior intensifies the localization and asymmetric distribution of charge, thereby significantly amplifying the dipole moment and polarizability.
Daohu Sheng, Siyao Cheng, Mengmeng Zhang, Jinglei Zhang, Xufei Zhu, Weijin Li, Bo Zhang, Aming Xie   +7 more
wiley   +1 more source

EVALUATION OF THE ANTIMICROBIAL EFFECTS OF NEW HETEROCYCLIC BIS-QUATERNARY AMMONIUM COMPOUNDS ON BIOFILMS

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2016
Considering the well-known mechanism of adaptable resistance of microorganisms to chemical compounds through biofilms formation and the widespread use of N-heterocyclic quaternary ammonium salts (QAC) as disinfectants, in this study we have evaluate the ...
OANA E. CONSTANTIN, BIANCA FURDUI, GABRIELA BAHRIM, RODICA M. DINICA   +3 more
doaj  

Hydrophobic cellulose nanocrystals modified with quaternary ammonium salts

, 2012
An environmentally friendly procedure in aqueous solution for the surface modification of cellulose nanocrystals (CNCs) using quaternary ammonium salts via adsorption is developed as inspired by organomodified layered silicates.
Zhou, Qi,, Salajková, Michaela,, Berglund, Lars,   +2 more
core   +1 more source

The adsorption characteristics of fluoride on commercial activated carbon treated with quaternary ammonium salts (Quats).

Science of the Total Environment, 2019
Commercial activated carbon was treated with six quaternary ammonium salts (Quats), namely, hexyltrimethylammonium (HTMA), octyltrimethylammonium (OTMA), decyltrimethylammonium (DCTMA), dodecyltrimethylammonium (DDTMA), Tetradecyltrimethylammonium (TDTMA)
Ching-Lung Chen, Sang-Won Park, J. F. Su, Yu-Han Yu, Jae-eun Heo, Kyungtae Kim, C. Huang   +6 more
semanticscholar   +1 more source

Advanced Dental Composite Technology via Bisilanized Dual‐Action Nanofillers for Biofilm Control

Advanced Science, EarlyView.
A multimodal research strategy has led to the development of an innovative resin‐based composite (RBC) with dual antibacterial action. The S_CM‐RBC formula showed strong antibiofilm activity, excellent mechanical strength, and biosafety. It effectively controlled oral bacteria in prevention of caries recurrence, and maintained pulp health in a rat ...
Chenmin Yao, Line Etiennot, Naiera Zayed, Shengjie Liang, Mehraveh Saghi, Jelle Verdonck, Lingyue Liu, Fei Zhang, Wim Teughels, Cui Huang, Kirsten Van Landuyt, Bart Van Meerbeek   +11 more
wiley   +1 more source