Search results for " DEGRADATION"

Evidence de l'adaptation des communautés microbiennes sédimentaires de rivière à la minéralisation du diuron: influence du ruissellement et de l'éros…

2010

International audience; Purpose Surface runoff and erosion are major drivers of pesticide transport from soils to rivers draining vineyard watersheds. A recent study showed that applications of diuron on vineyards and diuron dispersal could lead to microbial adaptation to diuron biodegradation from treated soils to the receiving hydrosystem. Given the limited knowledge on microbial adaptation to pesticide degradation in aquatic environments, we conducted a microcosm study designed to assess the impact of runoff and erosion processes on the adaptation of riverine-sediment microbial communities to diuron mineralization. Materials and methods The experimental laboratory set-up consisted in aqu…

SISTEMI DI CORONAMENTO E SMALTIMENTO DELLE ACQUE METEORICHE : LA REGOLA DELL'ARTE DAI TRATTATI AI MANUALI

2018

Il saggio approfondisce gli aspetti storici e costruttivi dei cornicioni che, da elementi di protezione, possono divenire, a causa della propria forma, talvolta anche elementi di degrado e dissesto. La struttura del testo del presente volume si compone di tre parti principali, presentando alcuni aspetti tecnici e questioni di non comune attenzione. La prima parte analizza una disamina sui valori formali e materiali del cornicione; esso presenta, infatti, caratteri complessi e riassume, proprio per la doppia valenza di ornamento (coronamento dell’edificio) e componente funzionale (sistema di allontanamento delle acque meteoriche dalla facciata) le problematiche che derivano da esigenze forma…

Monitoring soil salinization as a strategy for preventing land degradation: a case study in Sicily

2008

Organic coating on biochar explains its nutrient retention and stimulation of soil fertility

2017

Amending soil with biochar (pyrolized biomass) is suggested as a globally applicable approach to address climate change and soil degradation by carbon sequestration, reducing soil-borne greenhouse-gas emissions and increasing soil nutrient retention. Biochar was shown to promote plant growth, especially when combined with nutrient-rich organic matter, e.g., co-composted biochar. Plant growth promotion was explained by slow release of nutrients, although a mechanistic understanding of nutrient storage in biochar is missing. Here we identify a complex, nutrient-rich organic coating on co-composted biochar that covers the outer and inner (pore) surfaces of biochar particles using high-resoluti…

Compromised nuclear envelope integrity drives tumor cell invasion

2020

AbstractWhile mutations leading to a fragile envelope of the cell nucleus are well known to cause diseases such as muscular dystrophies or accelerated aging, the pathophysiological consequences of the recently discovered mechanically induced nuclear envelope ruptures in cells harboring no mutation are less known. Here we show that repeated loss of nuclear envelope integrity in nuclei experiencing mechanical constraints promotes senescence in nontransformed cells, and induces an invasive phenotype including increased collagen degradation in human breast cancer cells, both in vitro and in a mouse xenograft model of breast cancer progression. We show that these phenotypic changes are due to th…

Compromised nuclear envelope integrity drives TREX1-dependent DNA damage and tumor cell invasion

2021

Although mutations leading to a compromised nuclear envelope cause diseases such as muscular dystrophies or accelerated aging, the consequences of mechanically induced nuclear envelope ruptures are less known. Here, we show that nuclear envelope ruptures induce DNA damage that promotes senescence in non-transformed cells and induces an invasive phenotype in human breast cancer cells. We find that the endoplasmic reticulum (ER)-associated exonuclease TREX1 translocates into the nucleus after nuclear envelope rupture and is required to induce DNA damage. Inside the mammary duct, cellular crowding leads to nuclear envelope ruptures that generate TREX1-dependent DNA damage, thereby driving the …

How does information technology– based service degradation influence consumers’ use of services? An information technology–based service degradation …

2019

Information technology is crucial for modern services. Service delivery may include a complex mix of information technology and telecommunication providers, global networks and customers’ information technology devices. This research focuses on service failures that are caused by information technology problems, which we conceptualize as information technology-based service degradation (ITSD). When information technology-based service degradation occurs in a modern service, the information technology problem may originate from the service provider, another partner or any information technology equipment involved. But the customer may not be able to pinpoint the source of the problem immedi…

RETTORIA DI CASA PROFESSA - PALERMO LE TERMITI SUGLI ARREDI LIGNEI DELLA SACRESTIA

2012

"Rettoria di Casa Professa" - Palermo. The Termites on Wooden Forniture of the Sacristy. Termites are among the most important agents of wood degradation. They can attack wooden structures (roofs ceiling) or works of art (choirs, altars,wardrobes) causing serious damage to the historical, artistic and ethno-anthropological heritage especially when there are favourable environmental conditions for their growth. High wood moisture is the most important factor that favours termite settlements, it is frequently due to water condensation which is related to the closely contact of the wood with materials (masonry, metal, plastic) having a different thermal coefficient. Observations were carried o…

Thermal degradation of microcrystalline cellulose in concentrated phosphoric acid

2011

The most common renewable fuel is ethanol. It is a liquid produced by fermentation of glucose which is very abundant in cellulose based materials. Bioethanol is achieved in a two-steps process: 1. hydrolysis of the cellulose included in the ligno-cellulosic materials to fermentable reducing sugars; 2. fermentation of such sugars to ethanol. While the second fermentation step, mediated by yeasts or bacteria, is very well established, the first one must be still assessed for process optimization. Many efforts have been made to identify solvents for cellulose in order to develop methods for the achievement of fermentable glucose. In the presence of mineral acid, cellulose undergoes hydrolysis …

Towards the European harmonisation of a Soil Cadastre inventory as a tool for environmental, social, economic, legal and taxation purposes

2020

The cadastral systems existing in EU Member States satisfy private and public needs but there is no common regulation describing the purposes, minimum requirements and functions of the Cadastre in each State. In order to satisfy the need for harmonisation of Cadastres at the EU level, the Spanish Government's Official Performance Programme of the Spanish Presidency of the EU Council supported, in the first semester of 2002, the initiative proposed by the Spanish General Directorate for the Cadastre to hold the "First Congress on Cadastre in the European Union" (15-17 May 2002). The main objective of this conference was to study the role of the Cadastre at EU level and the methods for the in…