Results 1 to 10 of about 819,643 (245)

The Hesperornithiformes: A Review of the Diversity, Distribution, and Ecology of the Earliest Diving Birds

open access: yesDiversity, 2022
The Hesperornithiformes (sometimes referred to as Hesperornithes) are the first known birds to have adapted to a fully aquatic lifestyle, appearing in the fossil record as flightless, foot-propelled divers in the early Late Cretaceous. Their known fossil
Alyssa Bell, Luis M. Chiappe
doaj   +1 more source

An overview of the Santonian amber-bearing deposits of the Sainte-Baume Massif, southeastern France

open access: yesBSGF - Earth Sciences Bulletin, 2021
The Upper Cretaceous sedimentary succession cropping out in the Sainte-Baume Massif (Var, southeastern France) is of late Turonian to Campanian age. There, complex imbrication and rapid evolution in space and time of shallow-marine, fluvio-deltaic and ...
Frau Camille   +3 more
doaj   +1 more source

Another lesson from beautiful monsters: the case of 'sex reversals' in the Ammonoidea and their significance

open access: yesBMC Ecology and Evolution, 2021
Background Expression of sexual dimorphism is recognised in various fossil groups of molluscs such as the Ammonoidea, an extinct group of shelled cephalopods.
Camille Frau, Pierre-Yves Boursicot
doaj   +1 more source

The systematic affinities between the Lower Cretaceous Ammonoidea Protacanthoplites abichi (Anthula, 1900) and Acanthohoplites aschiltaensis (Anthula, 1900)

open access: yesEuropean Journal of Taxonomy, 2023
This work provides the first revision and illustration of the type material of the ammonite species Parahoplites abichi Anthula [Type species of Protacanthoplites Tovbina] and Parahoplites aschiltaensis Anthula [Type species of Acanthohoplites Sinzow ...
Camille Frau
doaj   +1 more source

Sirt1-PPARS Cross-Talk in Complex Metabolic Diseases and Inherited Disorders of the One Carbon Metabolism

open access: yesCells, 2020
Sirtuin1 (Sirt1) has a NAD (+) binding domain and modulates the acetylation status of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC1α) and Fork Head Box O1 transcription factor (Foxo1) according to the nutritional status.
Viola J. Kosgei   +3 more
doaj   +1 more source

CAN WE IDENTIFY MANNA ASH (FRAXINUS ORNUS L.) “SMART FORESTS” IN BANATULUI MOUNTAINS? [PDF]

open access: yesNatural Resources and Sustainable Development, 2020
Smart forests can be identified based on forest management plans if 15 stand, landscape or stational characteristics are taken into account. A total number of 34 smart stands were identified after these characteristics were graded based on the studied ...
Dincă Lucian   +2 more
doaj   +1 more source

FOREST STANDS FROM ACCUMULATION AND NATURAL LAKES SLOPES FROM THE SOUTHERN CARPATHIANS [PDF]

open access: yesPresent Environment and Sustainable Development, 2020
The Southern Carpathians are situated in the central part of Romania, between Prahova Valley and the Danube, being the highest and most massive mountains from the Romanian Carpahtians. The relief and vegetation are similar to the Alps.
Lucian DINCĂ   +2 more
doaj   +1 more source

Risiken von Pyrrolizidinalkaloiden in Tee und Kräutertee

open access: yesJournal für Kulturpflanzen, 2020
Pyrrolizidinalkaloide (PA) sind sekundäre Pflanzeninhaltsstoffe, die von einer Vielzahl von Pflanzen gebildet werden und u. a. zur Abwehr von Fraßfeinden dienen. Toxikologisch bedeutsam sind die PA, die eine Doppelbindung in 1,2-Position aufweisen. Diese
Benjamin Sachse   +6 more
doaj   +1 more source

Anatomy of Parahesperornis: Evolutionary Mosaicism in the Cretaceous Hesperornithiformes (Aves)

open access: yesLife, 2020
The Hesperornithiformes constitute the first known avian lineage to secondarily lose flight in exchange for the evolution of a highly derived foot-propelled diving lifestyle, thus representing the first lineage of truly aquatic birds.
Alyssa Bell, Luis M. Chiappe
doaj   +1 more source

Planning protection of Ciechanow castle versus contemporary exposition in the landscape

open access: yesBudownictwo i Architektura, 2022
The castle in Ciechanow is classified as a Gothic castle of the lowland type. The building, which is an example of defensive architecture, is located to the north of the historic urban layout of the  Ciechanow centre.
Katarzyna Drobek, Kamila Boguszewska
doaj   +1 more source

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