Studio descrittivo sulle caratteristiche psicologiche di un campione di bambini affetti da diabete mellito di tipo 1: dati preliminari

Objective: In recent years, was found a significant increase in type 1 diabetes mellitus (DM1), especially in prepubertal and pubertal age. From the data offered by the scientific literature about the epidemiological diffusion, disease management and possible associations between onset disease and environmental factors, we conducted a study with the following objectives: 1) investigate the psychological characteristics of children with type 1 diabetes mellitus (DM1); 2) evaluate the possible presence of significant life events preceding the onset of the disease; 3) noted the responsibility of children with diabetes in the management of the disease. Method: We administered to a population of diabetic patients and their parents: an ad hoc socio-demographic schedule; the CBCL (Child Behavior Checklist 4 / 18, 1991); the SAFA (Psychiatric Scale of Self-administration for Children and Adolescents of self 8/18, 2001). Results: The sample consisted of 54 subjects, 27 parent-child pairs. 81, 5% of parents reported the presence of at least one significant life event in the family or the child before the onset of diabetes and 96.3% considered their child responsible for his care. Analysis of the CBCL questionnaire revealed that the 74.1% of children with diabetes are within clinic range and 11.1%. on borderline. Children with diabetes scored significantly inferior than normal in Doubt-Indecision subscale (p=,038) and Inadequacy (p=,001) battery SAFA. Discussion: Results as the presence of significant life events preceding the onset Discussion: Results as the presence of significant life events preceding the onset of the disease and the responsibility of children with diabetes in managing the disease, appear to be in accord with data reported in the literature. We suppose that, beyond a causal linear, stressful life events can activate, in predisposed individuals, an immune reactio

Microbially mediated mechanisms underlie soil carbon accrual by conservation agriculture under decade-long warming

Increasing soil organic carbon (SOC) in croplands by switching from conventional to conservation management may be hampered by stimulated microbial decomposition under warming. Here, we test the interactive effects of agricultural management and warming on SOC persistence and underlying microbial mechanisms in a decade-long controlled experiment on a wheat-maize cropping system. Warming increased SOC content and accelerated fungal community temporal turnover under conservation agriculture (no tillage, chopped crop residue), but not under conventional agriculture (annual tillage, crop residue removed). Microbial carbon use efficiency (CUE) and growth increased linearly over time, with stronger positive warming effects after 5 years under conservation agriculture. According to structural equation models, these increases arose from greater carbon inputs from the crops, which indirectly controlled microbial CUE via changes in fungal communities. As a result, fungal necromass increased from 28 to 53%, emerging as the strongest predictor of SOC content. Collectively, our results demonstrate how management and climatic factors can interact to alter microbial community composition, physiology and functions and, in turn, SOC formation and accrual in croplands.</p

The Refugee Experience of Asylum Seekers in Italy: A Qualitative Study on the Intertwining of Protective and Risk Factors

This study aims to investigate the criticisms and support factors of the migratory experience of a group of asylum seekers (ASs) hosted in an Italian reception center. Starting from a psychosocial approach that gives importance to the intertwining of the personal history and context, the present study aims to explore the meaning that ASs give to their origins, the relationship of ASs with the host context and with professionals of the refugee centres, along with the representation of the Future. We conducted 27 semi-structured deep interviews with 9 male ASs with an average age of 24,4&nbsp;years. In line with the research goals, we carried out an analysis of pencil-and-paper content using the interpretative-phenomenological-analysis. Three different types of refugee experience emerged: persecutory, ambivalent and integrated. The three conditions identified can help professionals to better understand the different experiences of ASs, allowing them to develop more effective interventions

Статистический контроль качества испытаний фольги медной электролитической и катанки медной с использованием контрольных карт

Представлен метод статистического контроля правильности и повторяемости процесса проведения испытаний на основе трех фаз: сбора данных, анализа и управления процессом. Показан пример формирования подгрупп для контроля качества испытаний на примере катанки. Представлена причинно-следственная диаграмма Исикава для анализа процесса. Описан метод управления процессом.A method of the statistical surveillance of correctness and repeatability for tests carrying out process on basis of three phases is submitted: data collection, analysis and process control. The example of making up of subgroups for rod tests quality surveillance is shown. Isikava 's cause and effect diagram for process analysis is submitted. Process control method is described

Biogeochemical cycles and biodiversity as key drivers of ecosystem services provided by soils

Soils play a pivotal role in major global biogeochemical cycles (carbon, nutrient, and water), while hosting the largest diversity of organisms on land. Because of this, soils deliver fundamental ecosystem services, and management to change a soil process in support of one ecosystem service can either provide co-benefits to other services or result in trade-offs. In this critical review, we report the state-of-the-art understanding concerning the biogeochemical cycles and biodiversity in soil, and relate these to the provisioning, regulating, supporting, and cultural ecosystem services which they underpin. We then outline key knowledge gaps and research challenges, before providing recommendations for management activities to support the continued delivery of ecosystem services from soils. We conclude that, although soils are complex, there are still knowledge gaps, and fundamental research is still needed to better understand the relationships between different facets of soils and the array of ecosystem services they underpin, enough is known to implement best practices now. There is a tendency among soil scientists to dwell on the complexity and knowledge gaps rather than to focus on what we do know and how this knowledge can be put to use to improve the delivery of ecosystem services. A significant challenge is to find effective ways to share knowledge with soil managers and policy makers so that best management can be implemented. A key element of this knowledge exchange must be to raise awareness of the ecosystems services underpinned by soils and thus the natural capital they provide. We know enough to start moving in the right direction while we conduct research to fill in our knowledge gaps. The lasting legacy of the International Year of Soils in 2015 should be for soil scientists to work together with policy makers and land managers to put soils at the centre of environmental policy making and land management decisions.</p

Consequences of considering carbon–nitrogen interactions on the feedbacks between climate and the terrestrial carbon cycle

Author Posting. © American Meteorological Society, 2008. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 21 (2008): 3776–3796, doi:10.1175/2008JCLI2038.1.The impact of carbon–nitrogen dynamics in terrestrial ecosystems on the interaction between the carbon cycle and climate is studied using an earth system model of intermediate complexity, the MIT Integrated Global Systems Model (IGSM). Numerical simulations were carried out with two versions of the IGSM’s Terrestrial Ecosystems Model, one with and one without carbon–nitrogen dynamics. Simulations show that consideration of carbon–nitrogen interactions not only limits the effect of CO2 fertilization but also changes the sign of the feedback between the climate and terrestrial carbon cycle. In the absence of carbon–nitrogen interactions, surface warming significantly reduces carbon sequestration in both vegetation and soil by increasing respiration and decomposition (a positive feedback). If plant carbon uptake, however, is assumed to be nitrogen limited, an increase in decomposition leads to an increase in nitrogen availability stimulating plant growth. The resulting increase in carbon uptake by vegetation exceeds carbon loss from the soil, leading to enhanced carbon sequestration (a negative feedback). Under very strong surface warming, however, terrestrial ecosystems become a carbon source whether or not carbon–nitrogen interactions are considered. Overall, for small or moderate increases in surface temperatures, consideration of carbon–nitrogen interactions result in a larger increase in atmospheric CO2 concentration in the simulations with prescribed carbon emissions. This suggests that models that ignore terrestrial carbon–nitrogen dynamics will underestimate reductions in carbon emissions required to achieve atmospheric CO2 stabilization at a given level. At the same time, compensation between climate-related changes in the terrestrial and oceanic carbon uptakes significantly reduces uncertainty in projected CO2 concentration

Mycorrhizal hyphal turnover as a dominant process for carbon input into soil organic matter

The atmospheric concentration of CO2 is predicted to reach double current levels by 2075. Detritus from aboveground and belowground plant parts constitutes the primary source of C for soil organic matter (SOM), and accumulation of SOM in forests may provide a significant mechanism to mitigate increasing atmospheric CO2 concentrations. In a poplar (three species) plantation exposed to ambient (380 ppm) and elevated (580 ppm) atmospheric CO2 concentrations using a Free Air Carbon Dioxide Enrichment (FACE) system, the relative importance of leaf litter decomposition, fine root and fungal turnover for C incorporation into SOM was investigated. A technique using cores of soil in which a C-4 crop has been grown (delta C-13 -18.1 parts per thousand) inserted into the plantation and detritus from C-3 trees (delta C-13 -27 to -30 parts per thousand) was used to distinguish between old (native soil) and new (tree derived) soil C. In-growth cores using a fine mesh (39 mu m) to prevent in-growth of roots, but allow in-growth of fungal hyphae were used to assess contribution of fine roots and the mycorrhizal external mycelium to soil C during a period of three growing seasons (1999-2001). Across all species and treatments, the mycorrhizal external mycelium was the dominant pathway (62%) through which carbon entered the SOM pool, exceeding the input via leaf litter and fine root turnover. The input via the mycorrhizal external mycelium was not influenced by elevated CO2, but elevated atmospheric CO2 enhanced soil C inputs via fine root turnover. The turnover of the mycorrhizal external mycelium may be a fundamental mechanism for the transfer of root-derived C to SOM

Leaf litter decomposition in temperate deciduous forest stands with a decreasing fraction of beech (Fagus sylvatica)

We hypothesised that the decomposition rates of leaf litter will increase along a gradient of decreasing fraction of the European beech (Fagus sylvatica) and increasing tree species diversity in the generally beech-dominated Central European temperate deciduous forests due to an increase in litter quality. We studied the decomposition of leaf litter including its lignin fraction in monospecific (pure beech) stands and in stands with up to five tree genera (Acer spp., Carpinus betulus, Fagus sylvatica, Fraxinus excelsior, Tilia spp.) using a litterbag approach. Litter and lignin decomposition was more rapid in stand-representative litter from multispecific stands than in litter from pure beech stands. Except for beech litter, the decomposition rates of species-specific tree litter did not differ significantly among the stand types, but were most rapid in Fraxinus excelsior and slowest in beech in an interspecific comparison. Pairwise comparisons of the decomposition of beech litter with litter of the other tree species (except for Acerplatanoides) revealed a “home field advantage” of up to 20% (more rapid litter decomposition in stands with a high fraction of its own species than in stands with a different tree species composition). Decomposition of stand-representative litter mixtures displayed additive characteristics, not significantly more rapid than predicted by the decomposition of litter from the individual tree species. Leaf litter decomposition rates were positively correlated with the initial N and Ca concentrations of the litter, and negatively with the initial C:N, C:P and lignin:N ratios. The results support our hypothesis that the overall decomposition rates are mainly influenced by the chemical composition of the individual litter species. Thus, the fraction of individual tree species in the species composition seems to be more important for the litter decomposition rates than tree species diversity itself