Search results for "106"

Nordic research on educational and vocational guidance: a systematic literature review of thematic features between 2003 and 2016

2018

Educational and vocational guidance has received increased attention with regard to policymaking in the Nordic countries over the last 15 years. This has led to a growing interest in research-based knowledge. Updating an earlier article, we undertake a systematic literature review of guidance research in the Nordic countries during this 15-year period. Features and themes, both country-specific and in the region as a whole, are revealed through the analysis of a variety of research documents. Therefore, this article provides insight into research-based knowledge grounded in the Nordic context—relevant for both practitioners and policymakers on a national, Nordic, and international level. pe…

Toward Comprehensive Plant Microbiome Research

2020

Microbes have driven eco-evolutionary adaptations organizing biodiversity from the origin of life. They are ubiquitous and abundant, facilitating the biochemical processes that make Earth habitable and shape ecosystem structures, functions, and services. Recent studies reveal that commensalistic and beneficial microbes associated with wild and domesticated plants may aid in establishing sustainable agriculture for a changing climate. However, developing microbe-based biotechnologies and ecosystem services requires a thorough understanding of the diversity and complexity of microbial interactions with each other and with higher organisms. We discuss the hot and blind spots in contemporary re…

El antiguo Hospital de la Caridad e iglesia aneja de Nuestra Señora de los Dolores, de Yecla (Murcia): Mecenazgo, espacio arquitectónica y patrimonio…

2011

Involvement of Lipoxygenase-dependent Production of Fatty Acid Hydroperoxides in the Development of the Hypersensitive Cell Death induced by Cryptoge…

1999

Lipid peroxidation was investigated in relation with the hypersensitive reaction in cryptogein-elicited tobacco leaves. A massive production of free polyunsaturated fatty acid (PUFA) hydroperoxides dependent on a 9-lipoxygenase (LOX) activity was characterized during the development of leaf necrosis. The process occurred after a lag phase of 12 h, was accompanied by the concomitant increase of 9-LOX activity, and preceded by a transient accumulation of LOX transcripts. Free radical-mediated lipid peroxidation represented 10% of the process. Inhibition and activation of the LOX pathway was shown to inhibit or to activate cell death, and evidence was provided that fatty acid hydroperoxides ar…

Upper Caraş River (Danube watershed) fish populations fragmentation – technical rehabilitation proposal

2017

Abstract We propose a technical solution for fish movement based on the flow of water over a spill threshold. Such barriers are common in the Danube system. The proposed system has a range of operating components which are easily detachable from the spill threshold, are resistant to corrosion and will not harm the fish. In fact, if designed to complement swimming abilities of target fish, it should provide adequate passage for both adults and juveniles. If implemented correctly, the design may offer a solution to help displaced fish recolonize upstream habitats.

Flotsam samples can help explain the δ13C and δ15N values of invertebrate resting stages in lake sediment

2018

Abstract The stable isotopic composition of chitinous remains of Cladocera (water fleas) and freshwater Bryozoa (moss animals) preserved in lake sediment records can provide supporting insights into past environmental and ecosystem changes in lakes. Here we explore whether analyses of these remains isolated from lake flotsam can provide information on the driving variables affecting the isotopic composition of these remains. We collected flotsam in 53 lakes and found enough material in 33 lakes to measure the stable carbon and nitrogen isotope ratios (expressed as δ13C and δ15N values, respectively) of resting stages. These values were compared with lake characteristics, water chemistry mea…

Classification of tall-forb vegetation in the Pamir-Alai and western Tian Shan Mountains (Tajikistan and Kyrgyzstan, Middle Asia)

2020

Aims: To complete the syntaxonomic scheme for tall-forb vegetation of the montane and alpine belts in the Pamir-Alai and western Tian Shan Mountains in Tajikistan and Kyrgyzstan with some remarks on its environmental predictors. Study area: Middle Asia: Tajikistan and Kyrgyzstan. Methods: A total of 244 relevés were sampled in 2013–2019 using the seven-degree cover-abundance scale of the Braun-Blanquet approach. These were classified with a modified TWINSPAN algorithm with pseudospecies cut-levels 0%, 5% and 25%, and total inertia as a measure of cluster heterogeneity. Diagnostic species were identified using the phi coefficient as a fidelity measure. NMDS was used to explore the relationsh…

Projecting biodiversity and wood production in future forest landscapes: 15 key modeling considerations

2017

A variety of modeling approaches can be used to project the future development of forest systems, and help to assess the implications of different management alternatives for biodiversity and ecosystem services. This diversity of approaches does however present both an opportunity and an obstacle for those trying to decide which modeling technique to apply, and interpreting the management implications of model output. Furthermore, the breadth of issues relevant to addressing key questions related to forest ecology, conservation biology, silviculture, economics, requires insights stemming from a number of distinct scientific disciplines. As forest planners, conservation ecologists, ecologica…

Evolution and systematics of the late miocene spanish Giraffidae (Mammalia, Ruminantia, Pecora)

2017

Esta tesis doctoral se centra en la filogenia y sistemática de los jiráfidos del Mioceno tardío español (Mammalia, Ruminantia, Pecora). Los jiráfidos son un grupo monofilético de rumiantes caracterizados por la presencia de caninos bilobulados y un tipo especial de apéndice craneal epifisario y permanente denominado osicono [1]. Asimismo son los únicos supervivientes del clado Giraffomorpha, un grupo de rumiantes pécoras que contiene a Propalaeoryx junto con los Palaeomerycidae, Prolybitheriidae, Climacoceratidae y Giraffidae [2,3].Actualmente la familia Giraffidae está representada por tan solo dos géneros actuales africanos, Okapia, con una única especie, Okapia johnstoni, que habita las …

Activation of Grapevine Defense Mechanisms: Theoretical and Applied Approaches

2011

part 4.; International audience; Grapevine, as other plants, possesses an innate immune system that usually prevents infection by pathogens. General elicitors are compounds of different biochemical families capable of inducing plant defense reactions. In grapevine, the cascade of defense events induced by elicitors has been studied among others in cell suspensions. The perception of the elicitor triggers signaling events that allow the activation of defense genes encoding PR proteins and other proteins involved in phytoalexin production and cell wall reinforcement. The grapevine phytoalexins resveratrol and derivated compounds have been largely studied. In addition to their antimicrobial ac…