Atomic force microscopy: A versatile tool to probe the physical and chemical properties of supported membranes at the nanoscale

2012 ◽  
Vol 165 (8) ◽  
pp. 845-860 ◽  
Author(s):  
Laura Picas ◽  
Pierre-Emmanuel Milhiet ◽  
Jordi Hernández-Borrell
Keyword(s):  
Atomic Force Microscopy ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Supported Membranes ◽  
Force Microscopy ◽  
Atomic Force ◽  
Versatile Tool ◽  
Physical And Chemical ◽  
And Chemical Properties

scholarly journals Hydrophobin Vmh2–glucose complexes self-assemble in nanometric biofilms

2012 ◽  
Vol 9 (75) ◽  
pp. 2450-2456 ◽  
Author(s):  
Ilaria Rea ◽  
Paola Giardina ◽  
Sara Longobardi ◽  
Fabrizio Porro ◽  
Valeria Casuscelli ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Organic Layer ◽  
Average Height ◽  
Physical And Chemical Properties ◽  
Water Contact ◽  
Force Microscopy ◽  
Small Proteins ◽  
Atomic Force ◽  
Physical And Chemical ◽  
And Chemical Properties

Hydrophobins are small proteins secreted by fungi, which self-assemble into amphipathic membranes at air–liquid or liquid–solid interfaces. The physical and chemical properties of some hydrophobins, both in solution and as a biofilm, are affected by poly or oligosaccharides. We have studied the interaction between glucose and the hydrophobin Vmh2 from Pleurotus ostreatus by spectroscopic ellipsometry (SE), atomic force microscopy (AFM) and water contact angle (WCA). We have found that Vmh2–glucose complexes forms a chemically stable biofilm, obtained by drop deposition on silicon, 1.6 nm thick and containing 35 per cent of glucose, quantified by SE. AFM highlighted the presence of nanometric rodlet-like aggregates (average height, width and length being equal to 3.6, 23.8 and 40 nm, respectively) on the biofilm surface, slightly different from those obtained in the absence of glucose (4.11, 23.9 and 64 nm). The wettability of a silicon surface, covered by the organic layer of Vmh2–glucose, strongly changed: WCA decreased from 90° down to 17°.

Formation sequence of solid-electrolyte-interphases and impacts on lithium deposition and dissolution on copper: an in-situ atomic force microscopic study

2021 ◽  
Author(s):  
Wei-Wei Wang ◽  
Yu Gu ◽  
Hao Yan ◽  
Kai-Xuan Li ◽  
Zhao-Bin Chen ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Microscopic Study ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Lithium Metal ◽  
Atomic Force ◽  
Lithium Metal Anodes ◽  
Physical And Chemical ◽  
And Chemical Properties

Copper is a most widely used substrate for Li deposition and dissolution in lithium metal anodes, which are complicated by the formation of solid-electrolyte-interphases (SEIs) whose physical and chemical properties...

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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