Search results for "Content"
showing 10 items of 1859 documents
Now you see me, now you don’t: applying automated content analysis to track migrant women’s salience in German news
2020
Reading media headlines and articles about migration, one quickly gets the impression that the media discourse is focussed on migrant men. To investigate to what extend this perception actually hol...
PRE-SCHOOLER QUESTIONS ENCOURAGING COGNITION
2018
When pre-schooler learns language, development of his cognitive processes changes, ability to classify and generalise rises. Child’s needs and interests encourage him to ask, answer, think, act. Word meanings are used and sought in various speech situations, especially when expressing all known, unknown, understood, not understood verbally. Asking and answering questions requires certain vocabulary, ability to formulate thoughts and find contact with communication partner in dialogue. Aim: study of the pre-schooler question content, influence thereof on formation of cognitive interests. Methods and materials: analysis of theoretical literature, observations, conversations with children, wri…
Vocational education approach: New TEL settings—new prospects for teachers' instructional activities?
2013
This study focuses on vocational education teachers’ instructional activities in a new technology-enhanced learning (TEL) setting. A content analysis is applied to investigate teachers’ and students’ interactions in a 3D game context. The findings illustrate that when teachers’ and students’ interactions are mediated by a game, teachers seem to apply different discussion activities to empower vocational learning than they do in traditional classroom settings. Additionally, the present study shows that teachers spontaneously develop new ways of supporting vocational learning processes. In more detail, two main types of instructional activities were identified: a “knowledge-providing” approac…
A novel alpha-amylase-lipase formulation as anti-staling agent in durum wheat bread
2016
The aim of this work has been to evaluate the anti-staling effect exerted by a novel α-amylase-lipase enzyme formulation on durum wheat bread, in comparison with four different commercial amylase preparations and with control without added enzymes. Bread-making trials were carried out at industrial level. Sliced bread, packed under modified atmosphere, was analyzed for texture profile, moisture content, and water activity during 90 days. Crumb sections were submitted to environmental scanning electron microscopy at the end of the storage period. The α-amylase-lipase enzyme preparation showed synergistic interactions in preventing staling. In particular, bread added of these two enzymes in m…
The role of water in the impact of high pressure on the myrosinase activity and glucosinolate content in seedlings from Brussels sprouts
2019
Abstract In this study, it was shown that the amount of available water was found to influence the high pressure processing (HPP) effect on both myrosinase activity and total glucosinolate concentration in Brussels sprouts seedlings. Brussels sprouts seedlings with different water content (wc = 4.8–89.4%) and water activity (aw = 0.17–0.97) were pressurized at selected pressures between 200 and 800 MPa (5 °C and 3 min), thereby affecting pressure-induced enzyme denaturation, molecular diffusion, and cell permeability differently. The myrosinase activity and intact glucosinolate content in the dry seedlings (wc Industrial relevance High pressure processing (HPP) is increasingly applied in t…
Moisture loss, gain and migration in foods and its impact on food quality
2010
Abstract: Moisture loss, gain and transfer, whether originating from exchanges with the atmosphere or with another component of the food, always cause deterioration in the overall quality of the food through softening, toughening, breakdown, and swelling or shrinkage caused by phase transitions or dissolution (Petersen et al., 1999). In most cases, water migrations lead to a deterioration of the overall quality (organoleptic or hygienic) of the food. With a view to better understanding physical deterioration of food and to provide a tool to better control food quality (and give a longer shelf life) this chapter reviews the water relationships in foods with a particular focus on glass-transi…
Water in Dairy Products | Analysis and Measurement of Water Activity
2011
Water activity of a system (aw) is a thermodynamic concept used to characterize the contained water. It has been considered, in spite of some limitations, as the most important parameter in food technology for the past 50 years. It can be measured by the ratio (p/p0) of the water vapor pressure in the atmosphere at equilibrium with the material to the saturated vapor pressure of pure water at the same temperature, or by the physical properties related to it (freezing point depression, mechanical/electrical properties). Although the physical/chemical mechanisms responsible for the depression of aw as compared to that of pure water are more or less identified, the expressions describing the r…
How and why does willow biochar increase a clay soil water retention capacity?
2018
Addition of biochar into a soil changes its water retention properties by modifying soil textural and structural properties. In addition, internal micrometer-scale porosity that is able to directly store readily plant available water affects soil water retention properties. This study shows how precise knowledge of the internal micrometer-scale pore size distribution of biochar can deepen the understanding of the biochar-water interactions in soils. The micrometer-scale porosity of willow biochar was quantitatively and qualitatively characterized using X-ray tomography, 3D image analysis and Helium ion microscopy. The effect of biochar application on clay soil water retention was studied by…
Emerging topics in scientific research on global water-use efficiency
2019
AbstractA bibliometric analysis of research articles published on water-use efficiency was performed using the Web of Science database and evaluated. Journal titles, publication years, subject categories, keywords and countries publishing were obtained. A number of 2077 papers were retrieved, two-thirds of them published in the last decade. The articles were published in 439 journals, with Agricultural Water Management, Agronomy Journal, Crop Science, Field Crops Research and Indian Journal of Agricultural Sciences the most productive. Most of the leading productive journals have Impact Factors in the top quartiles of the Journal Citation Reports. Agronomy, Plant Sciences, Water Resources a…
Critical analysis of thermal inertia approaches for surface soil water content retrieval
2013
The “thermal inertia” method to retrieve surface soil water content maps on bare or sparsely-vegetated soils is analysed. The study area is a small experimental watershed, where optical and thermal images (in day and night time) and in situ data were simultaneously acquired. The sensitivity of thermal inertia to the phase difference between incoming radiation and soil temperature is demonstrated. Thus, to obtain an accurate value of the phase difference, the temporal distance between thermographs using a three-temperature approach is evaluated. We highlight when a cosine correction of the temperature needs to be applied, depending on whether the thermal inertia formulation includes two gene…