Search results for "plastic"

Tadpole Responses to Environments With Limited Visibility: What We (Don’t) Know and Perspectives for a Sharper Future

2022

Amphibian larvae typically inhabit relatively shallow freshwater environments, and within these boundaries there is considerable diversity in the structure of the habitats exploited by different species. This diversity in habitat structure is usually taken into account in relation to aspects such as locomotion and feeding, and plays a fundamental role in the classification of tadpoles into ecomorphological guilds. However, its impact in shaping the sensory worlds of different species is rarely addressed, including the optical qualities of each of these types of water bodies and the challenges and limitations that they impose on the repertoire of visual abilities available for a typical vert…

Intergenerational fitness effects of the early life environment in a wild rodent

2019

The early life environment can have profound, long‐lasting effects on an individual's fitness. For example, early life quality might (a) positively associate with fitness (a silver spoon effect), (b) stimulate a predictive adaptive response (by adjusting the phenotype to the quality of the environment to maximize fitness) or (c) be obscured by subsequent plasticity. Potentially, the effects of the early life environment can persist beyond one generation, though the intergenerational plasticity on fitness traits of a subsequent generation is unclear. To study both intra‐ and intergenerational effects of the early life environment, we exposed a first generation of bank voles to two early life…

Environmental factors modulating cold tolerance, gene expression and metabolism in Drosophila montana

2011

Eco-physiological aspects of adaptation to seasonal environments : the latitudinal range expansion of the Colorado potato beetle across Europe

2013

Structure and dielectric breakdown strength of nano calcium carbonate/polypropylene composites

2013

Nanodielectrics, a 21st-century phenomena, is envisioned to be the answer for material challenges in progressive high-voltage technology. It is well known that the proper dispersion of nanoparticles plays a key role in improving the dielectric properties of a material, but to understand where changes in the properties of a material originate, it is also essential to reveal the multiscale structure of the material. In this study, the dielectric permittivity, breakdown strength, and structure of nano calcium carbonate (nano-CaCO3)/polypropylene composites with 1.8-8.1 wt % doping were characterized systematically. The combined results from transmission electron microscopy, Raman microscopy, a…

Optical Monitoring of Microplastics Filtrated from Wastewater Sludge and Suspended in Ethanol.

2021

The abundance of microplastics (MPs) in the atmosphere, on land, and especially in water bodies is well acknowledged. In this study, we establish an optical method based on three different techniques, namely, specular reflection to probe the medium, transmission spectroscopy measurements for the detection and identification, and a speckle pattern for monitoring the sedimentation of MPs filtrated from wastewater sludge and suspended in ethanol. We used first Raman measurements to estimate the presence and types of different MPs in wastewater sludge samples. We also used microscopy to identify the shapes of the main MPs. This allowed us to create a teaching set of samples to be characterized …

Transformation of proliferative verrucous leukoplakia to oral carcinoma: a ten years follow-up

2004

Los autores presentan un caso de leucoplasia verrugosa proliferativa (LVP) en varón de 78 años de edad. Fue inicialmente presentado como un caso de leucoplasia en lengua pero un estudio microscópico en 1991 reveló la presencia de displasia epitelial leve. Tras 5 años de seguimiento, la lesión sufrió cambios de tamaño y localización y tuvo comportamiento recidivante. En 1996, un área eritematosa granular e indurada que apareció en lengua resultó ser un carcinoma de células escamosas microinvasivo cuando se estudió microscópicamente. Tras una revisión del comportamiento clinicopatológico de esta entidad, los autores concluyeron que se trataba de una leucoplasia verrugosa proliferativa, cuyo d…

Coopetition, standardization and general purpose technologies : A framework and an application

2023

Funding Information: We thank Paul Wiegmann, Geerten van de Kaa, Filippo Grillo, Tuomo Uotila, Elina Berghäll, Joakim Wikström and a number of anonymous reviewers for helpful comments. Earlier versions of the paper have been presented at EURAS2022 conference at Adam Smith Business School of the University of Glasgow, 38th Summer Seminar of Finnish Economist at University of Jyväskylä and Lappeenranta-Lahti University of Technology LUT. Heikkilä gratefully acknowledges financial support from the Foundation for Economic Education (Liikesivistysrahasto, Reino Rossi Memorial Fund), PHP Säätiö and the Jyväskylä University School of Business and Economics. We argue that coopetition and standardiz…

Uretroplastica con innesto dorsale di mucosa buccale: è ancora il metodo di scelta nella stenosi uretrale a lungo termine? – P18.

2015

INTRODUZIONE E OBIETTIVO DELLO STUDIO: Risultati a lungo termine dell'uretroplastica con innesto dorsale di mucosa buccale e fattori predittivi negativi della metodica. MATERIALI E METODI: Analisi retrospettiva di 27 pazienti sottoposti a uretroplastica con innesto di mucosa buccale (prelievo del graft della guancia di circa 4x2,5 cm) per stenosi uretrale nel periodo 2010-2015 (mediana 42 mesi). Flusso massimo (Qmax), residuo post-minzionale (RPM), ecografia del corpo spongioso uretrale, test IPSS (solo domanda su QoL) e percezione soggettiva allo svuotamento sono stati ottenuti prima e dopo l’intervento (un mese e dopo mediana di 3,5 anni). L’età media del campione era di 43,2 anni (range …

Stipe dentro il pithos

2005

The subject of the chapter is the study of all the materials collected in the so-called “stipe inside the pithos” found on the acropolis of Gela during the excavations conducted in the 1960s. The materials are examined and an interpretative hypothesis is advanced on the divinity to whom the offering is addressed