Results 1 to 10 of about 6,655 (137)

Paedomorphosis and retention of juvenile diet lead speciation in a group of Neotropical snakes (Colubroides-Philodryadini) [PDF]

open access: yesScientific Reports
Dipsadidae is one of the largest clades of extant reptiles, showing an impressive morphological and ecological diversity. Despite this fact, the developmental processes behind its diversity are still largely unknown.
Mariana Chuliver, Agustín Scanferla
doaj   +2 more sources

A new Cretaceous thyreophoran from Patagonia supports a South American lineage of armoured dinosaurs [PDF]

open access: yesScientific Reports, 2022
The early evolution of thyreophoran dinosaurs is thought to have occurred primarily in northern continents since most evidence comes from the Lower and Middle Jurassic of Europe and North America.
Facundo J. Riguetti   +2 more
doaj   +2 more sources

3D Printing High-Consistency Enzymatic Nanocellulose Obtained from a Soda-Ethanol-O2 Pine Sawdust Pulp [PDF]

open access: yesBioengineering, 2019
Soda-ethanol pulps, prepared from a forestry residue pine sawdust, were treated according to high-consistency enzymatic fibrillation technology to manufacture nanocellulose.
Heli Kangas   +8 more
doaj   +2 more sources

Effect of Ethyl Acetate on the Defatting of Leaves in the Extraction of Stevia rebaudiana Bertoni [PDF]

open access: yesFood Technology and Biotechnology
Research background. The process for producing purified steviol glycosides from Stevia rebaudiana leaves (stevia) generally involves pretreatments, extraction, purification and crystallization.
Liliana Celaya, Nicolás Kolb Koslobsky
doaj   +2 more sources

Fabrication of TiO2 Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments [PDF]

open access: yesInternational Journal of Biomaterials, 2015
The bio- and hemocompatibility of titanium alloys are due to the formation of a TiO2 layer. This natural oxide may have fissures which are detrimental to its properties. Anodic oxidation is used to obtain thicker films. By means of this technique, at low
María Laura Vera   +3 more
doaj   +2 more sources

Biocomposites of Bio-Polyethylene Reinforced with a Hydrothermal-Alkaline Sugarcane Bagasse Pulp and Coupled with a Bio-Based Compatibilizer [PDF]

open access: yesMolecules, 2020
Bio-polyethylene (BioPE, derived from sugarcane), sugarcane bagasse pulp, and two compatibilizers (fossil and bio-based), were used to manufacture biocomposite filaments for 3D printing.
Nanci Vanesa Ehman   +6 more
doaj   +2 more sources

Novel type of egg-clustering in threadsnakes (Serpentes: Leptotyphlopidae) [PDF]

open access: yesVertebrate Zoology, 2023
Snakes lay their eggs in clutches of different size, which are usually attached to each other forming a cluster. Egg-clustering is a widespread phenomenon across alethinophidian snakes, mostly recorded in Pythonoidea and caenophidian clades.
Mariana Chuliver, Agustín Scanferla
doaj   +3 more sources

EL ÁREA DE PALEONTOLOGÍA DE LA FUNDACIÓN AZARA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2022
El Área de Paleontología de la Fundación Azara funciona en la Universidad Maimónides. En 17 años se ha afianzado con solidez en las publicaciones, los encuentros de colegas y en los medios.
Sebastián Apesteguía   +2 more
doaj   +1 more source

Bioconversion of Wood Waste to Bio-ethylene: A Review

open access: yesBioResources, 2021
Bio-based ethylene produced by bioethanol dehydration is an environmentally friendly substitute for oil-based ethylene. It is a low-pollution raw material that can be used to produce high-value bio-based materials.
Carolina Mónica Mendieta   +5 more
doaj   +1 more source

Dos sitios de altura en la Sierra del Cajón. El estado actual de las investigaciones en la localidad arqueológica de pichanal, provincia de Catamarca [PDF]

open access: yesLa Zaranda de Ideas, 2014
En este trabajo presentamos dos sitios arqueológicos situados al interior de la Sierra del Cajón en la provincia de Catamarca, y ocupados en el Periodo Tardío (ca. 1000-1430).
Violeta Cantarelli   +2 more
doaj   +1 more source

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