Search results for " Stab"

showing 10 items of 1773 documents

Hydrogen isotopes (δ2H) of polyunsaturated fatty acids track bioconversion by zooplankton

2022

1. Organisms at the base of aquatic food webs synthesize essential nutrients, such as omega-3 polyunsaturated fatty acids (n-3 PUFA), which are transferred to consumers at higher trophic levels. Many consumers, requiring n-3 long-chain (LC) PUFA, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), have limited ability to biosynthesize them from the essential dietary precursor α-linolenic acid (ALA) and thus rely on dietary provision of LC-PUFA. 2. We investigated LC-PUFA metabolism in freshwater zooplankton using stable hydrogen isotopes (δ2H) of fatty acids as tracers. We conducted feeding experiments with the freshwater keystone grazer Daphnia to quantify changes in the δ2…

trophic ecologyzooplanktonbioconversionecophysiologyrehevöityminenfungiDaphnia magnaplanktoncompound-specific stable isotopesrasvahapotvesiekosysteemitessential fatty acidsGC-IRMStrophic upgradingekofysiologiaeutrophicationisotooppianalyysivesikirputlipids (amino acids peptides and proteins)ravintoaineetdeuteriumravintoverkot
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Benthic foodweb structure in a large shallow lake studied by stable isotope analysis

2014

The benthic foodweb structure of Lake Võrtsjärv, a large (270 km2), shallow, and turbid Estonian lake, was evaluated based on C and N stable-isotope signatures (δ13C, δ15N). Variation in δ13C between sampling sites was not related to site proximity to the littoral zone or the more vegetated southern part of the lake, but rather appeared to be influenced by in-situ site peculiarities. δ13C was stable temporally and between functional feeding groups, a result implying that the whole benthic food web of the lake relies largely on the same C source admixture, essentially particulate organic matter (POM). Thus, the foodweb composition of Lake Võrtsjärv is remarkably homogeneous given the lake’s …

trophic levelsEcologyδ13CEcologyta1172macroinvertebratesδ15Nbenthic food websAquatic ScienceFood webOceanographyBenthic zonemethane-oxidizing bacteriacarbon sourceLittoral zoneEnvironmental sciencecarbon and nitrogen stable isotopesLake VõrtsjärvEcology Evolution Behavior and SystematicsIsotope analysisInvertebrateTrophic levelFreshwater Science
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Istota funduszu stabilizacyjnego w kontekście problemu dopuszczalności zwrotu wpłat na rzecz syndyka upadłej spółdzielczej kasy oszczędnościowo-kredy…

2021

W dwuczęściowym opracowaniu analizowany jest problem dopuszczalności żądania przez syndyka upadłej spółdzielczej kasy oszczędnościowo-kredytowej zwrotu wpłat wniesionych na fundusz stabilizacyjny. Nie jest to tylko zagadnienie istnienia bądź jego braku roszczenia cywilnoprawnego po stronie syndyka. Rzeczywistą istotą przedstawionego dylematu jest pytanie o dopuszczalność ograniczenia ustawowego atrybutu Krajowej Spółdzielczej Kasy Oszczędnościowo-Kredytowej wykonywanego w interesie publicznym. Fundusz stabilizacyjny odgrywa bowiem szczególną rolę w całym systemie finansowym. Istotą działania kasy jest idea samopomocy finansowej, polegająca na wzajemnym kredytowaniu się członków kasy ze zgro…

upadłośćreturn of paymentsNational Credit Unionbankruptcyzwrot wpłatcooperative savings and credit unionstabilization fundspółdzielcza kasa oszczędnościowo kredytowaKasa Krajowafundusz stabilizacyjnyStudia Prawnicze. Rozprawy i materiały
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Uzņēmumu aptauja 2020

2020

Aptauja ir veikta projekta "Ekonomiskais, politiskais un juridiskais ietvars Latvijas tautsaimniecības potenciāla saglabāšanai un konkurētspējas pieauguma veicināšanai pēc pandēmijas izraisītas krīzes (reCOVery-LV)" ietvaros. Aptaujas mērķis ir novērtēt kā sabiedrība uztver valsts politikas atbilstību krīzes radītām sekām. Aptaujas rezultāti tika izmantoti zinātniskā raksta un monogrāfijas sagatavošanai.

uzņēmumu ekonomiskā un finansiālā stabilitāteekonomiskā ilgtspējaCOVID-19:SOCIAL SCIENCES::Business and economics [Research Subject Categories]:SOCIAL SCIENCES::Other social sciences [Research Subject Categories]
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Regional metacommunities in two coastal systems: spatial structure and drivers of plant assemblages

2014

Aim Biogeographical patterns in metacommunities are still poorly understood, and different processes are expected to occur in different habitats. We analysed the regional plant metacommunities of coastal habitats to test whether (1) the influence of space and climate differs between two habitats differentiated along the seashore–inland gradient, and (2) regional variation in species composition of these habitats can be ascribed to different metacommunity paradigms. Location The entire coast of the Iberian Peninsula, south-western Europe. Methods We collected data on the plant species composition of coastal sites on sand dunes across 3000 km of coastline. The sites were classified into two h…

vegetation databasesMetacommunityMediterranean climateDistance decaydune habitatsmetacommunityEcologyCommunity assemblyEcologydistance decaySpecies sortingenvironmental filtering15. Life on landdispersal limitationSand dune stabilizationGeographyHabitatSpatial ecologyOrdination14. Life underwaterspecies sortingCommunity assembly dispersal limitation distance decay dune habitats environmental filtering Iberian Peninsula metacommunity species sorting vegetation databasesEcology Evolution Behavior and SystematicsIberian PeninsulaJournal of Biogeography
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L’impiego della carbossimetilcellulosa come alternativa alla stabilizzazione tartarica a freddo dei vini bianchi e rossi

2014

vini rossi e bianchi stabilità tartarica polifenoli carbossimetilcellulosa gomma arabica
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Experimental evolution of genome architecture and complexity in an RNA virus

2016

Introducción La evolución de la arquitectura del genoma – las dimensiones y la organización del material hereditario de un organismo – es poco conocida. Existe una variación asombrosa en la arquitectura genómica entre diferentes organismos. Los virus tienden a tener genomas pequeños, con un mínimo de secuencias intergénicas y típicamente con genes solapantes, los cuales se cree son una forma de compresión del genoma que permite al virus incrementar su número de proteínas sin aumentar su tamaño. Los procariotas tienen genomas compactos, pero con secuencias intergénicas más largas que los virus, y los genes con solapamientos largos son escasos. Los eucariotas presentan una amplia gama de tama…

virus evolutiongenome architectureRNA virusUNESCO::CIENCIAS DE LA VIDAexperimental evolutiongenome evolutiongenome stability:CIENCIAS DE LA VIDA [UNESCO]
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Cadmium Metal–Organic Frameworks Based on Ditopic Triazamacrocyclic Linkers: Unusual Structural Features and Selective CO 2 Capture

2017

International audience; Two three-dimensional cadmium metal organic frameworks with general formula [Cd-2(L-1)(H2O)(3)](NO3)(0.7)(HCOO)(0.2)Br-0.1 (Cd2L1, L-1 = 1,4,7-tris(4-carboxybenzy1)-1,4,7-triazacyclononane) and Cd(HL2)(H2O)(2) (CdL2, L-2 = 1,4,7-tris(3-(4-benzoate)prop-2-yn-1-yl)-1,4,7-triazacydononane) based on 1,4,7-triazacyclononane N-functionalized by different arylcarboxylic acids were prepared under solvothermal conditions and characterized by single crystal X-ray analysis and porosity measurements. The crystal structure of Cd2L1 reveals a cationic net with a bcs topology,. and nodes are constituted by dinuclear cadmium complexes, in which each cadmium atom adopts a hexacoordin…

zeolitic imidazolate frameworksInorganic chemistrycopper-complexeschemistry.chemical_element02 engineering and technologyCrystal structure010402 general chemistry01 natural sciences[ CHIM ] Chemical Sciencescarbon-dioxide capturechemistry.chemical_compound[ CHIM.CRIS ] Chemical Sciences/Cristallography[CHIM.CRIS]Chemical Sciences/Cristallography[CHIM]Chemical Sciencesambient conditionsGeneral Materials ScienceCarboxylatebuilding unitsPorositywater stabilityTopology (chemistry)CadmiumCationic polymerizationgas-adsorptionGeneral Chemistry[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyCondensed Matter Physicsporous coordination polymers0104 chemical sciences3. Good healthCrystallographysingle-crystalchemistrystructure validation[ CHIM.MATE ] Chemical Sciences/Material chemistryAmine gas treating0210 nano-technologySingle crystal
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Radioaktivitāte

2023

Mācību grāmatas mērķis ir iepazīstināt lasītāju ar radioaktivitātes fenomenu, jautājumiem par atoma kodola stabilitāti, radioaktīvo elementu, starojuma iedarbību un izmantošanas iespējām. --///-- Šis ir nekomerciāls izdevums, un visi ievietotie attēli ir tikai iepazīšanās,mācīšanās un pētniecības mērķiem, tādi, kurus neaizsargā autortiesības (Public Domain) vai arī kuru autori tos klasificējuši atbilstoši CC BY-NC-SA 4.0 licences lietojumam.

zinātnes un tehnikas progressatoma kodola stabilitāte; radioaktīvo elementu un starojuma iedarbība:NATURAL SCIENCES [Research Subject Categories]
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Augu sugu daudzveidības izmaiņas pēc augstā purva hidroloģiskā režīma atjaunošanas

2021

Bakalaura darbā “Augu sugu daudzveidības izmaiņas pēc augstā purva hidroloģiskā režīma atjaunošanas” apskatīta veģetācijas atbildes reakcija augstajos purvos, kur ar aizsprostiem projekta “LIFE 13 NAT/LV/00578 Prioritāro mitrāju biotopu apsaimniekošana Latvijā” ietvaros veicināta ekosistēmai raksturīgā hidroloģiskā režīma atjaunošanās. Darba mērķis ir noskaidrot gruntsūdens līmeņa stabilizēšanas radīto ietekmi uz veģetāciju piecus gadus pēc atjaunošanas darbiem Sudas-Zviedru un Bažu purvā. Darba izstrādes laikā veikti gruntsūdens līmeņa mērījumi un veģetācijas monitorings, kā arī izmantoti iepriekšējo gadu laikā projektā uzkrātie dati. Darbs balstās uz jau esoša projekta bāzes, sniedzot ilg…

ĢeogrāfijaSudas–Zviedru purvsBažu purvspurvu apsaimniekošanaaugsto purvu veģetācijahidroloģiskā režīma stabilizēšana
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