Bacteriostatic Effects of Apatite-Covered Ag/AgBr/TiO2 Nanocomposite in the Dark: Anomaly in Bacterial Motility

被引：16

作者：

Ahmadyand, Seyedsaeid ^{[1
]}

Elahifard, Mohammadreza ^{[4
]}

Jabbarzadeh, Mehdi ^{[5
]}

Mirzanejad, Amir ^{[4
]}

Pflughoeft, Kathryn ^{[2
]}

Abbasi, Bahman ^{[6
]}

Abbasi, Behrooz ^{[3
]}

机构：

[1] Univ Nevada, Dept Chem, Reno, NV 89557 USA

[2] Univ Nevada, Dept Microbiol & Immunol, Sch Med, Reno, NV 89557 USA

[3] Univ Nevada, Dept Met Engn, Reno, NV 89557 USA

[4] Ardakan Univ, Chem Engn Dept, Fac Engn, Ardakan 8951895491, Iran

[5] Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA

[6] Oregon State Univ, Dept Mech Engn, Corvallis, OR 97333 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2019年 / 123卷 / 04期

关键词：

INDUCED CONFORMATIONAL-CHANGE; VISIBLE-LIGHT PHOTOCATALYST; POROUS GLASS-CERAMICS; ESCHERICHIA-COLI; SILVER NANOPARTICLES; COATED AG/AGBR/TIO2; TITANIUM; DESTRUCTION; INHIBITORS; CHEMOTAXIS;

D O I：

10.1021/acs.jpcb.8b10710

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we report a unique property of inactivating Gram-positive/negative bacteria in the dark via apatite-covered Ag/AgBr/TiO2 nanocomposites (AAAT). We demonstrate that the inactivation mechanism is bacteriostatic based on the cellular integrity and motility of bacteria, low toxicity and high durability of AAAT. From straight observations, the catalytic loading affects the bacterial replication and cell envelope as well as inducing an anomaly in bacterial motility (continuous rotation) for both types of bacteria. Both simulation and experimental analyses suggest that the anomaly could be due to posterior intracellular signals rather than purely mechanical effects (e.g., size enlargement and motility retardation). Provoked by chemomechanical stimuli, these signals increase the frequency of flagellar tumbling and eventually entangle the bacteria.

引用

页码：787 / 791

页数：5

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