scholarly journals Editorial: In Focus Issue on Bacterial-Surface Interactions

2017 ◽  
Vol 12 (5) ◽  
pp. 05G201
Author(s):  
Sally L. McArthur ◽  
Katharina Maniura
Keyword(s):  
Surface Interactions ◽  
Bacterial Surface

Analysis of Bacterial Surface Interactions Using Microfluidic Systems

2011 ◽  
Vol 94 (4) ◽  
pp. 431-450 ◽  
Author(s):  
Aaron P. Mosier ◽  
Nathaniel C. Cady
Keyword(s):  
Surface Interactions ◽  
Microfluidic Systems ◽  
Bacterial Surface

Engineering Bacterial Surface Interactions Using DNA as a Programmable Material

2022 ◽  
Author(s):  
Yuhan Kong ◽  
Qi Du ◽  
Juan Li ◽  
Hang Xing
Keyword(s):  
Cell Signaling ◽  
Colony Formation ◽  
Surface Interactions ◽  
Biological Functions ◽  
Bacterial Surface ◽  
Host Infection

The diverse surface interactions and functions of a bacterium play an important role in cell signaling, host infection, and colony formation. To understand and synthetically control biological functions of individual...

scholarly journals Species-dependent hydrodynamics of flagellum-tethered bacteria in early biofilm development

2016 ◽  
Vol 13 (115) ◽  
pp. 20150966 ◽  
Author(s):  
Rachel R. Bennett ◽  
Calvin K. Lee ◽  
Jaime De Anda ◽  
Kenneth H. Nealson ◽  
Fitnat H. Yildiz ◽  
...  
Keyword(s):  
Shewanella Oneidensis ◽  
Surface Interactions ◽  
Bacterial Surface ◽  
Flagellar Filament ◽  
Transition Event ◽  
Surface Detachment ◽  
Species Specific ◽  
Biofilm Development ◽  
The Impact ◽  
Spinning Behaviour

Monotrichous bacteria on surfaces exhibit complex spinning movements. Such spinning motility is often a part of the surface detachment launch sequence of these cells. To understand the impact of spinning motility on bacterial surface interactions, we develop a hydrodynamic model of a surface-bound bacterium, which reproduces behaviours that we observe in Pseudomonas aeruginosa , Shewanella oneidensis and Vibrio cholerae , and provides a detailed dictionary for connecting observed spinning behaviour to bacteria–surface interactions. Our findings indicate that the fraction of the flagellar filament adhered to the surface, the rotation torque of this appendage, the flexibility of the flagellar hook and the shape of the bacterial cell dictate the likelihood that a microbe will detach and the optimum orientation that it should have during detachment. These findings are important for understanding species-specific reversible attachment, the key transition event between the planktonic and biofilm lifestyle for motile, rod-shaped organisms.

Study of Tip-Surface Interactions in Scanning Tunneling Microscopy (STM) by Reflection Electron Microscopy (REM)

1990 ◽  
Vol 48 (1) ◽  
pp. 320-321
Author(s):  
W. Lo ◽  
J.C.H. Spence ◽  
M. Kuwabara
Keyword(s):  
High Resolution ◽  
Elastic Strain ◽  
Tunneling Current ◽  
Surface Damage ◽  
Surface Interactions ◽  
Graphite Surface ◽  
Scanning Tunneling ◽  
Large Area ◽  
Tunneling Microscopy ◽  
High Resolution Tem

Work on the integration of STM with REM has demonstrated the usefulness of this combination. The STM has been designed to replace the side entry holder of a commercial Philips 400T TEM. It allows simultaneous REM imaging of the tip/sample region of the STM (see fig. 1). The REM technique offers nigh sensitivity to strain (<10−4) through diffraction contrast and high resolution (<lnm) along the unforeshortened direction. It is an ideal technique to use for studying tip/surface interactions in STM.The elastic strain associated with tunnelling was first imaged on cleaved, highly doped (S doped, 5 × 1018cm-3) InP(110). The tip and surface damage observed provided strong evidence that the strain was caused by tip/surface contact, most likely through an insulating adsorbate layer. This is consistent with the picture that tunnelling in air, liquid or ordinary vacuum (such as in a TEM) occurs through a layer of contamination. The tip, under servo control, must compress the insulating contamination layer in order to get close enough to the sample to tunnel. The contaminant thereby transmits the stress to the sample. Elastic strain while tunnelling from graphite has been detected by others, but never directly imaged before. Recent results using the STM/REM combination has yielded the first direct evidence of strain while tunnelling from graphite. Figure 2 shows a graphite surface elastically strained by the STM tip while tunnelling (It=3nA, Vtip=−20mV). Video images of other graphite surfaces show a reversible strain feature following the tip as it is scanned. The elastic strain field is sometimes seen to extend hundreds of nanometers from the tip. Also commonly observed while tunnelling from graphite is an increase in the RHEED intensity of the scanned region (see fig.3). Debris is seen on the tip and along the left edges of the brightened scan region of figure 4, suggesting that tip abrasion of the surface has occurred. High resolution TEM images of other tips show what appear to be attached graphite flakes. The removal of contamination, possibly along with the top few layers of graphite, seems a likely explanation for the observed increase in RHEED reflectivity. These results are not inconsistent with the “sliding planes” model of tunnelling on graphite“. Here, it was proposed that the force due to the tunnelling probe acts over a large area, causing shear of the graphite planes when the tip is scanned. The tunneling current is then modulated as the planes of graphite slide in and out of registry. The possiblity of true vacuum tunnelling from the cleaned graphite surface has not been ruled out. STM work function measurements are needed to test this.

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