The use of atomic force microscopy to measure the efficacies of various chemical sanitizers in removing organic matter from glass surfaces

2010 ◽  
Vol 100 (1) ◽  
pp. 139-144 ◽  
Author(s):  
Gerald Sigua ◽  
Saikat Adhikari ◽  
G.S. Frankel ◽  
Melvin A. Pascall
Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 520-525 ◽  
Author(s):  
S. A. Gazze ◽  
I. Hallin ◽  
G. Quinn ◽  
E. Dudley ◽  
G. P. Matthews ◽  
...  

Variations at the nanoscale in soil and organic matter distribution are critical to understanding the factors involved in soil composition and turnover. Atomic Force Microscopy describes soil physical and topographical properties at the nanoscale, and thus represents an important tool in soil nanoscience.


Langmuir ◽  
2003 ◽  
Vol 19 (17) ◽  
pp. 6570-6572 ◽  
Author(s):  
Nathalie Destouches ◽  
Marie Foret ◽  
Eric Courtens ◽  
Michel Ramonda

2009 ◽  
Vol 7 (43) ◽  
pp. 285-296 ◽  
Author(s):  
In Yee Phang ◽  
Nick Aldred ◽  
Xing Yi Ling ◽  
Jurriaan Huskens ◽  
Anthony S. Clare ◽  
...  

Barnacles are a major biofouler of man-made underwater structures. Prior to settlement, cypris larvae explore surfaces by reversible attachment effected by a ‘temporary adhesive’. During this exploratory behaviour, cyprids deposit proteinaceous ‘footprints’ of a putatively adhesive material. In this study, footprints deposited by Balanus amphitrite cyprids were probed by atomic force microscopy (AFM) in artificial sea water (ASW) on silane-modified glass surfaces. AFM images obtained in air yielded better resolution than in ASW and revealed the fibrillar nature of the secretion, suggesting that the deposits were composed of single proteinaceous nanofibrils, or bundles of fibrils. The force curves generated in pull-off force experiments in sea water consisted of regions of gradually increasing force, separated by sharp drops in extension force manifesting a characteristic saw-tooth appearance. Following the relaxation of fibrils stretched to high strains, force–distance curves in reverse stretching experiments could be described by the entropic elasticity model of a polymer chain. When subjected to relaxation exceeding 500 ms, extended footprint proteins refolded, and again showed saw-tooth unfolding peaks in subsequent force cycles. Observed rupture and hysteresis behaviour were explained by the ‘sacrificial bond’ model. Longer durations of relaxation (>5 s) allowed more sacrificial bond reformation and contributed to enhanced energy dissipation (higher toughness). The persistence length for the protein chains ( L P ) was obtained. At high elongation, following repeated stretching up to increasing upper strain limits, footprint proteins detached at total stretched length of 10 µm.


2016 ◽  
Author(s):  
Galja Pletikapić ◽  
Nadica Ivošević DeNardis

Abstract. Marine organic matter has a highly reactive nature; it continuously undergoes biotic and abiotic transformations and consequently exhibits high variation in both time and space, with a tendency to accumulate at the interfaces. To study its role in natural systems, it is of crucial importance to preserve its original state. We present the potential of non-invasive surface methods, namely, the electrochemical method of chronoamperometry at mercury electrode applied together with atomic force microscopy imaging (AFM), and their suitability on the basis of field studies undertaken in the northern and southern Adriatic Sea (Boka Kotorka Bay, Montenegro). Electrochemical approach meets the requirements for monitoring purposes due to the simple and fast analysis of a large number of raw seawater samples enabling simultaneous differentiation of organic constituents. On the other hand, atomic force microscopy allows direct visualization of biotic and abiotic particles and provides an insight into structural organization of marine organic matter at micro- and nanometer scales. Application of these methods can contribute to the prediction of mucilage events and to the monitoring of organic pollution in aquatic systems. Moreover, understanding the dynamics of organic matter in seawater is of crucial importance for improvement of national legislation on environmental protection, sustainable development and for management of marine systems.


2007 ◽  
Vol 375 (1) ◽  
pp. 239-246 ◽  
Author(s):  
G.R. Jafari ◽  
M. Reza Rahimi Tabar ◽  
A. Iraji zad ◽  
G. Kavei

Sign in / Sign up

Export Citation Format

Share Document