Introduction to the Study of Environmental Fractals

Senesi, N.; Wilkinson, Kevin J.

doi:10.1002/9780470511206.ch1

Cited by 3 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To assess mass FD of the mycelial network image treatment was performed using R version 4.2.2 (R Core Team 2022 ) and Image J (Schneider et al 2012 ). FD was measured using the box counting method already used for mycelia (Obert et al 1990 , Boddy et al 1999 , Senesi and Wilkinson 2008 ). This method involves overlapping the image with grids of scaling pixel sizes (i.e.…”

Section: Comparison Of the Fungal Drops System To Normal Agar Mediummentioning

confidence: 99%

“…This growth mechanism is ideal for the colonization of soils, and thus, it is observed in other fungi-like microorganisms including some bacteria and protists (Wolf et al 2013 , Geisen et al 2018 ). Soils are considered as one of the most structurally and biologically complex ecosystems on Earth and a major reservoir of biodiversity (Nannipieri et al 2003 , Fitter et al 2005 , Senesi and Wilkinson 2008 , Phillips 2017 ). In soils, shifting chemical properties and heterogeneity are exacerbated by an ever-changing physical matrix, which gives rise to a 3D structure with an arguably infinite combination of microniches (Ettema and Wardle 2002 , Tiedje et al 2009 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fungal drops: a novel approach for macro- and microscopic analyses of fungal mycelial growth

Buffi,

Cailleau,

Kuhn

et al. 2023

microLife

View full text Add to dashboard Cite

This study presents an inexpensive approach for the macro- and microscopic observation of fungal mycelial growth. The “fungal drops” method allows to investigate the development of a mycelial network in filamentous microorganisms at the colony and hyphal scales. A heterogeneous environment is created by depositing 15-20 µL drops on a hydrophobic surface at a fixed distance. This system is akin to a two-dimensional (2D) soil-like structure in which aqueous-pockets are intermixed with air-filled pores. The fungus (spores or mycelia) is inoculated into one of the drops, from which hyphal growth and exploration take place. Hyphal structures are assessed at different scales using stereoscopic and microscopic imaging. The former allows to evaluate the local response of regions within the colony (modular behaviour), while the latter can be used for fractal dimension analyses to describe the hyphal network architecture. The method was tested with several species to underpin the transferability to multiple species. In addition, two sets of experiments were carried out to demonstrate its use in fungal biology. First, mycelial re-organisation of Fusarium oxysporum was assessed as a response to patches containing different nutrient concentrations. Second, the effect of interactions with the soil bacterium Pseudomonas putida on habitat colonization by the same fungus was assessed. This method appeared as fast and accessible, allowed for a high level of replication, and complements more complex experimental platforms. Coupled with image analysis, the fungal drops method provides new insights into the study of fungal modularity both macroscopically and at a single-hypha level.

show abstract

Section: Comparison Of the Fungal Drops System To Normal Agar Mediummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fungal drops: a novel approach for macro- and microscopic analyses of fungal mycelial growth

Buffi,

Cailleau,

Kuhn

et al. 2023

microLife

View full text Add to dashboard Cite

show abstract

Model of bound water formation in fractal clusters resulting from reversible aggregation of colloidal particles

Ugrozov¹

2011

Colloid J

View full text Add to dashboard Cite

Characteristics of rapeseed oil cake using nitrogen adsorption

Sokołowska¹,

Bowanko²,

Boguta³

et al. 2013

International Agrophysics

View full text Add to dashboard Cite

A b s t r a c t. Adsorption of nitrogen on the rapeseed oil cake and rapeseed oil cake with wheat meal extrudates was investigated. The results are presented as adsorption-desorption isotherms. The Brunauer-Emmet and Teller equation was used to analyse the experimental sorption data. To obtain estimates of the surface area and surface fractal dimension, the sorption isotherms were analyzed using the Brunauer-Emmet and Teller and Frenkel-Halsey-Hill equations. Mesopore analysis was carried out using the Dollimore and Heal method. The properties and surface characteristic of rapeseed oil cake extrudates are related to different basic properties of particular samples and duration of the extrusion process. Extrusion conditions lead to essential differences in particular products. For all kinds of rapeseed oil cakes the amount of adsorbed nitrogen was different, but for the rapeseed oil cake extrudates a large amount of adsorbed nitrogen was observed. The average surface area of the rapeseed oil cake extrudates was about 6.5-7.0 m 2 g -1 , whereas it was equal to about 4.0-6.0 m 2 g -1 for rapeseed oil cake with the wheat meal extrudates. In the case of non-extruded rapeseed oil cake and wheat meal, the dominant group included ca. 2 and 5 nm pores. The values of surface fractal dimension suggested that the surface of the extrudates was more homogenous than that of the raw material. Duration of the extrusion process to 80 s resulted in a decrease in the specific surface area, surface fractal dimension, and porosity of the extrudates.K e y w o r d s: rapeseed oil cake extrudates, nitrogen sorption, specific surface area, fractal dimension, porosity INTRODUCTION Physical gas adsorption is often used as a method to study the surface and pore characteristics of solid materials. The technique accurately determines the amount of a gas retained by a solid body, which is a direct measure for the surface and porous properties. The method is relatively fast and relatively easy in operating the equipment. The isotherm obtained from experiments can provide information about the surface area, surface energetic and geometric heterogeneity, pore volume and pore size distribution (PSD). Nitrogen adsorption at 77 K is a standard method for investigation of porous solids and can be used for routine quality control, as well as for investigation of new materials (Rouquerol et al., 1994;Sing, 2001).The theory of fractals is becoming more and more widely used for describing the structure of disordered media and the processes occurring in them (Senesi and Wilkinson, 2008). Many methods have been developed to obtain surface fractal dimensions (D s ) of adsorbents on the basis of different experiments. Among those, the methods based on analysis of adsorption isotherms play an important role, since they require only one complete adsorption isotherm for a given adsorbent to calculate the surface fractal dimension (Terzyk et al., 2003). A simple method for calculation of the fractal dimension from a single adsorption isotherm was developed by J...

show abstract

Introduction to the Study of Environmental Fractals

Cited by 3 publications

References 21 publications

Fungal drops: a novel approach for macro- and microscopic analyses of fungal mycelial growth

Fungal drops: a novel approach for macro- and microscopic analyses of fungal mycelial growth

Model of bound water formation in fractal clusters resulting from reversible aggregation of colloidal particles

Characteristics of rapeseed oil cake using nitrogen adsorption

Contact Info

Product

Resources

About