Search results for "moho"

The logarithmic transformation should be avoided for stabilising the variance of mould growth rate.

2007

Abstract Radial growth rate, μ (mm d − 1 ) was evaluated by plotting the radius of the colony, r (mm) versus time (d) for Alternaria alternata , Aspergillus flavus , Cladosporium cladosporioides , Mucor racemosus , Rhizopus oryzae and Trichoderma harzianum at different T and a w . For each of the 12 data sets, an analysis of variance of the raw growth rate data was performed. It was observed from the P -values that all square-root transformed values of μ were non-significant at the significance level α  = 0.05, whereas for untransformed values of μ , three of the 12 values were significant and for logarithmically transformed μ , nine of the 12 values were significant at the significance lev…

Modelo de cabalgamiento profundo para el Alto Atlas (Marruecos). Implicaciones sísmicas en la zona de colisión entre Eurasia y Africa

2007

Previous crustal models of the High Atlas suppose the existence of a mid-crustal detachment where all the surface thrusts merged and below which the lower crust was continuous. However, both seismic refraction data and gravity modeling detected a jump in crustal thickness between the High Atlas and the northern plains. Here we show that this rapid and vertical jump in the depth of Moho discontinuity suggests that a thrust fault may penetrate the lower crust and offset the Moho (deep-rooted “thick skinned” model). The distribution of Neogene and Quaternary volcanisms along and at the northern part of the High Atlas lineament can be related to the beginning of a partial continental subduction…

Efficacy of natamycin for control of growth and ochratoxin A production by Aspergillus carbonarius strains under different environmental conditions

2007

Aims:  To examine the efficacy of natamycin produced by Streptomyces natalensis against strains of Aspergillus carbonarius growth and ochratoxin A (OTA) production under different environmental factors on a grape juice-based medium. Methods and Results:  Detailed studies in the range 0–20 ng ml−1 for control of growth and ochratoxin production by strains of A. carbonarius at 0·98, 0·96 and 0·94 water availabilities (aw) and 15–25°C on a fresh red grape extract medium were examined. Inhibition of growth was depending on temperature and aw level. At 15°C, 5–10 ng ml−1 natamycin was effective in reducing growth almost completely. However, at 20–25°C and all the three aw levels, growth was only…

Così parlò László Moholy-Nagy. Osservazioni tecnico-critiche sulla fotografia digitale

2010

Multi-disciplinary analysis to construct a crustal model of the Sicily Channel using geological and geophysical techniques (data): impacts on geologi…

2023

To understand the dynamics of crustal deformation and earthquakes in active orogenic systems, it is essential to have a detailed view of the lithospheric structures in three dimensions (3D). Several studies in the literature explain how 3D visualization can enable the recognition of tectonic structures or to be able to establish connections between intraplate volcanoes (Wu et al., 2016; Lei & Zhao, 2016; Tan et al., 2019). This work aims to define and discretize a 1D-velocity model of the Sicily Channel; create a detailed 3D lithospheric model of the Sicily Channel using a multidisciplinary approach to evaluate the geological hazard elements that affect the Iblean foreland integrating bathy…

A temperature-type model for describing the relationship between fungal growth and water activity

2001

Growth of Penicillium chrysogenum, Aspergillus flavus, Cladosporium cladosporioides and Alternaria alternata at their respective optimum temperatures was studied in Potato Dextrose Agar (PDA) medium at different water activities (a(w)) adjusted with glycerol. The growth rate (mu) was expressed as the increase in colony radius per unit of time. This paper extends the model that showed the relationship between temperature and bacterial growth rate developed by Rosso et al. [J. Theor. Biol. 162 (1993) 447] to describe the influence of a(w) on fungal development. An excellent correlation between the experimental data and the model predictions was obtained, the regression coefficients (r2) were …

Inactivation of conidia of Penicillium chrysogenum, P. digitatum and P. italicum by ethanol solutions and vapours

2008

A fractional factorial design, 2(5-1) experiments, was used for assessing the influence of 5 factors: water activity, aw [0.7, 0.9], temperature, T ( degrees C) [10, 30], mode of application, A [liquid, vapour], ethanol concentration, E (% w/w) [5, 10] and time, t (d) [1, 4] on the inactivation of spores of Penicillium chrysogenum, P. digitatum and P. italicum. Survival was determined by germination at optimal conditions within 3d. The experimental response was log (N 0/Nt), where N 0 and Nt (spore ml(-1)) the concentrations of viable spores at t=0 and t respectively. By a decreasing order of sensitivity to ethanol, moulds were ranked as followed: P. digitatum, P. italicum and P. chrysogenu…

Modelling regional-scale attenuation across Italy and the Tyrrhenian Sea

2021

Abstract Modelling regional-scale attenuation of seismic waves at ~1 Hz is challenging, especially when these waves propagate across both continental and oceanic crust. Recent developments in seismic imaging and modelling have provided us with the computational tools necessary to reconstruct these mixed settings using deterministic (coherent) and stochastic (coda) information. Here, we present new tomographic maps of coda-attenuation for both the Italian peninsula and the Tyrrhenian Sea. Kernel-based coda attenuation imaging in the diffusive approximation is tested in the oceanic environment, highlighting a non-diffusive behaviour across the Southern Tyrrhenian Sea. Joint deterministic and …

Aflatoxinas, tricotecenos de tipo A y hongos productores en maíz y avena. Nuevos antifúngicos y su impacto en salud

2021

Los hongos filamentosos están ampliamente distribuidos en la naturaleza y existen especies causantes de infecciones en el hombre, animales o plantas, o productores de micotoxinas que pueden ocasionar intoxicaciones agudas o crónicas. Los hongos toxigénicos pertenecen principalmente a los géneros Aspergillus, Fusarium y Penicillium. El cambio climático facilita la adaptación de especies toxigénicas a nuevas condiciones de estrés térmico/hídrico, lo cual afecta a su distribución geográfica en cultivos básicos, como los cereales. Ello facilita la dominancia de las especies mejor adaptadas, lo que se traduce en la emergencia de ciertas micotoxinas en los cereales como las aflatoxinas (AF) o tri…

Analytical study and exposure to Fusarium mycotoxins = Estudio analítico y de exposición a micotoxinas de Fusarium

2015

Las micotoxinas son metabolitos secundarios de determinadas especies fúngicas que se encuentran habitualmente en los alimentos. El Reglamento No. 1881/2006 de la Comisión Europea, parcialmente modificado por posteriores Reglamentos, establece los contenidos máximos de micotoxinas para diferentes productos alimenticios. La introducción de estas normas pone de manifiesto el interés por el conocimiento de valores relativos a la concentración de estos tóxicos para poder evaluar riesgos y adoptar las medidas necesarias para proteger la salud de los consumidores. Los productos agrícolas contaminados, especialmente cereales y sus derivados, son la principal fuente de micotoxinas en la dieta de la …