Search results for "shift"
showing 10 items of 1226 documents
Managing biotic interactions for ecological intensification of agroecosystems.
2014
9 pages; International audience; Agriculture faces the challenge of increasing food production while simultaneously reducing the use of inputs and delivering other ecosystem services. Ecological intensification of agriculture is a paradigm shift, which has recently been proposed to meet such challenges through the manipulation of biotic interactions. While this approach opens up new possibilities, there are many constraints related to the complexity of agroecosystems that make it difficult to implement. Future advances, which are essential to guide agricultural policy, require an eco-evolutionary framework to ensure that ecological intensification is beneficial in the long term.
Functional characterization of the sea urchin sns chromatin insulator in erythroid cells.
2005
Abstract Chromatin insulators are regulatory elements that determine domains of genetic functions. We have previously described the characterization of a 265 bp insulator element, termed sns, localized at the 3′ end of the early histone H2A gene of the sea urchin Paracentrotus lividus. This sequence contains three cis-acting elements (Box A, Box B, and Box C + T) all needed for the enhancer-blocking activity in both sea urchin and human cells. The goal of this study was to further characterize the sea urchin sns insulator in the erythroid environment. We employed colony assays in human (K562) and mouse (MEL) erythroid cell lines. We tested the capability of sns to interfere with the communi…
Apzinātā pieticība: atsacīšanās, pamatojumi un šķēršļu pārvarēšanas stratēģijas
2016
Arvien vairāk izplatoties patērniecībai, pieaug arī tās kritika gan diskursā, gan rīcībās. Viena no rīcību izpausmēm ir apzinātā pieticība, kuru raksturo atteikšanās no noteiktām patēriņa iespējām, kuru ietekme tiek saskatīta kā negatīva (vides, dzīvnieku un cilvēku kontekstā), vai arī vispārīga patēriņa samazināšana. Šī bakalaura darba tēma ir “Apzinātā pieticība: atsacīšanās, pamatojumi un šķēršļu pārvarēšanas stratēģijas”, tā mērķis ir noskaidrot, kā tiek konceptualizēta atsacīšanās un kādas ir apzinātās pieticības izplatītākās prakses, pamatojumi, šķēršļi un to pārvarēšanas stratēģijas. Pētījumā noskaidrots, ka konkrēto informantu gadījumā pieticība ir apzināta, viņiem svarīgi ir ekoloģ…
Solvent-dependent hypsochromic shift in the imidazole based complex [Cu(µ2-SO4)(Im)4] and ameliorative effects on breast cancer-induced bone metastas…
2023
A sulfate-bridged complex [Cu(µ2-SO4)(Im)4] (1) was prepared and structurally characterized, where Im: imidazole. The X-ray structure analysis reveals that 1 crystallizes in the monoclinic system with space group C2/c. The octahedral coordination around the metal center is made up of four distinct imine nitrogen atoms in the equatorial plane, and two sulfate oxygen atoms occupying the axial sites. The covalent linkage between metals via the sulfate group, forming infinite 1D zigzag chains, ensures the entanglement of the structure. These chains, in turn, are further assembled into a 2D network through N-H...O hydrogen bonding. Thermal analyses underline the high thermal stability of our com…
Design, Construction, and Characterization of a New Regioisomer and Diastereomer Material Based on the Spirooxindole Scaffold Incorporating a Sulphon…
2020
The 1,3-dipolar cycloaddition reaction is one of the most rapid, and efficient protocols to access, and construct highly divergent heterocycle chiral auxiliaries. Free catalyst synthesis of spirooxindole scaffold incorporating sulphone moiety via one pot&ndash
Family networks and refugees’ health conditions. A picture from Italian informal settlements
2021
While the relationships between social networks and health are widely acknowledged in the literature, few of these studies have covered the population of refugees living in makeshift camps. In our analysis of a nationally representative Italian survey of individuals living in informal settlements, we find that many had weak family relations: only 10 per cent had one or more family members in their settlement. The paper analyses the effects of individual social network on two measures of health, and finds that the refugees’ health conditions were associated with both their personal characteristics and the characteristics of the settlement. The results show that more than 50 per cent of these…
The two-factor structure of cognitive flexibility : tempo of switching and overcoming of prepotent responses
2023
Prezentowane badanie miało na celu odkrycie struktury procesów latentnych leżących u podstaw wykonania kilku zadań, które hipotetycznie mierzą spontaniczną i adaptacyjną giętkość poznawczą, dostarczając dowodów na ich trafność zbieżną. Grupa zdrowych ochotników (N = 121) ukończyła dwa zestawy zadań do oceny spontanicznej i adaptacyjnej giętkości poznawczej. Spontaniczna giętkość poznawcza obejmowała test myślenia dywergencyjnego (do oceny płynności i giętkości myślenia) oraz werbalny test płynności. Miary giętkości adaptacyjnej obejmowały test przełączania się między zadaniami jako miarę kosztów przełączania oraz test przerzucania uwagi jako miarę wyuczonej nieistotności i perseweracji. Nat…
Coralline algal growth-increment widths archive North Atlantic climate variability
2011
Over the past decade coralline algae have increasingly been used as archives of paleoclimate information. Encrusting coralline algae, which deposit annual growth increments in a high Mg-calcite skeleton, are amongst the longest-lived shallow marine organisms. In fact, a live-collected plant has recently been shown to have lived for at least 850 years based on radiometric dating. While a number of investigations have successfully used geochemical information of coralline algal skeletons to reconstruct sea surface temperatures, less attention has been paid to employ growth increment widths as a temperature proxy. Here we explore the relationship between growth and environmental parameters in …
UNA PROCEDURA AUTOMATIZZATA PER LA DETERMINAZIONE DELLE CURVE MAESTRE DI BITUMI PER USO STRADALE
2014
<em>El dibujado</em>: volver a la pared
2021
The exhibition El dibujado by Paco Roca (IVAM, 2019) is an exploration of the paradigm shift brought forth by the abandonment of paper and reproducibility as a space for the dissemination of the comic strip. The exhibition hall of a museum (the Instituto Valenciano de Arte Moderno) becomes a space for formal and ephemeral experimentation at different levels, from the purely creative to the pondering about the unexplored possibilities of the language of the comic book. With this exhibition cartoonist Paco Roca poses a challenge to a spectator who is called to leave his/her role as a visitor and become the reader of an experience in which s/he becomes a part of the work’s own narrative. The a…