Results 61 to 70 of about 31,550 (224)

Fluidos supercríticos em química analítica. II. Cromatografia com fluido supercrítico: instrumentação [PDF]

open access: yesQuímica Nova, 2003
The first paper in this series discussed the basic theory involved in supercritical fluid chromatography (SFC) and how the technique progressed from gas and liquid chromatography. The first SFC instruments were simple adaptations of the commercially available liquid chromatographs with packed columns followed by modifications in gas chromatographs ...
Carrilho, Emanuel   +2 more
openaire   +4 more sources

High‐Quality Epitaxial Five‐Layer Aurivillius Films with In‐Plane Ferroelectricity for Electrocaloric Cooling

open access: yesAdvanced Electronic Materials, Volume 11, Issue 11, July 2025.
High‐quality epitaxial five‐layer Sr2Bi4Ti5O18Aurivillius films are grown on SrTiO3 by pulsed laser deposition. The electrocaloric effect derived from measurements of the in‐plane ferroelectric polarization reveals a maximum temperature change of ΔT ∼ 0.95 °C under an electric field of 150 kV cm⁻¹ at 135 °C.
Sara Lafuerza   +10 more
wiley   +1 more source

Análise do comportamento de transientes de pressão em polidutos com vazamento: um estudo utilizando dados de simulação [PDF]

open access: yes, 2001
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia QuímicaO presente trabalho tem como objetivo apresentar o comportamento da pressão em um duto com vazamento.
Barañano, Audrei Giménez
core  

ENSO Diversity Regulation of the Impact of MJO on Extreme Snowfall Events in the Peruvian Andes

open access: yesInternational Journal of Climatology, Volume 45, Issue 7, 15 June 2025.
Composite of filtered anomalies in the 20–90‐d band for wind (m s−1) and geopotential height (in m) anomalies over South America at 200 hPa for (a) Central La Niña and DJF MJO Phases 6 + 7, (b) Non‐ENSO conditions and JJA RMM Phases 4 + 5, (c) Non‐ENSO conditions and JJA RMM Phases 6 + 7, (d) Central El Niño and JJA MJO Phases 8 + 1, (e) Eastern El ...
Juan Sulca
wiley   +1 more source

Diseño y propuesta de un plan de mercadeo orientado a la comercialización de productos sellados de fluidos para la empresa técnicas de fluidos [PDF]

open access: yes, 2011
Reseña de la empresa Técnica de Fluidos -- Historia y conceptos del sellado de fluidos -- Diagnóstico ...
Henríquez Romero, Samuel Vicente   +2 more
core  

Shell characterization of the youngest valid species of the European Eocene genus Neochelys (Pleurodira, Podocnemididae): The Spanish Bartonian Neochelys salmanticensis

open access: yesThe Anatomical Record, Volume 308, Issue 6, Page 1553-1572, June 2025.
Abstract The freshwater pleurodiran turtle Neochelys is the best‐represented member of Podocnemididae in the European record, being known by eight Eocene species. The youngest of them is the Bartonian (middle Eocene) Neochelys salmanticensis, from the Duero Basin (Salamanca Province, Central Spain).
Adán Pérez‐García   +3 more
wiley   +1 more source

Imbibición en papel

open access: yesCiencia Ergo Sum, 1999
Se estudió un grupo de patrones experimentales durante el proceso de imbibición. A partir del registro de dichos patrones y la digitalización de cuadros elegidos, se midieron los frentes de la imbibición (límites entre las zonas secas y húmedas) en papel
Abraham Medina   +2 more
doaj  

A new Crocodyloidea from the middle Eocene of Zamora (Duero Basin, Spain)

open access: yesThe Anatomical Record, Volume 308, Issue 6, Page 1692-1706, June 2025.
Abstract The eusuchian crocodyliforms recorded in the Eocene levels of the Spanish Duero Basin belong to three lineages: Planocraniidae, with the species Duerosuchus piscator; Alligatoroidea, represented by several specimens of the genus Diplocynodon; and Crocodyloidea, which includes several specimens traditionally attributed to Asiatosuchus.
Iván Narváez   +5 more
wiley   +1 more source

On fluido-dynamic models for urban traffic

open access: yesNetworks & Heterogeneous Media, 2009
The aim of this paper is to address the following questions: which models, among fluido-dynamic ones, are more appropriate to describe urban traffic? While a rich debate was developed for the complicate dynamics of highway traffic, some basic problems of urban traffic are not always appropriately discussed. We analyze many recent, and less recent,
Mauro Garavello, Benedetto Piccoli
openaire   +3 more sources

A bothremydid turtle (Pleurodira) from the middle Cenomanian of Vale de Figueira (Belas, Portugal)

open access: yesThe Anatomical Record, Volume 308, Issue 6, Page 1573-1579, June 2025.
Abstract An unpublished turtle shell from the middle Cenomanian of Vale de Figueira, near Belas (Lisbon District, Portugal), is recognized by us as collected in 1880 under the direction of Carlos Ribeiro. No turtle remains from that region had so far been figured, described or discussed from a systematic point of view.
Miguel Telles Antunes   +1 more
wiley   +1 more source

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