Search results for "EIA"

GRAS, Irene; FREIXA, Mireia (coords.). "Acadèmia i art. Dinàmiques, transferències i significació a l’època moderna i contemporània"

2016

Resource profitability, but not caffeine, affects individual and collective foraging in the stingless beePlebeia droryana

2019

ABSTRACT Plants and pollinators form beneficial relationships, with plants offering resources in return for pollination services. Some plants, however, add compounds to nectar to manipulate pollinators. Caffeine is a secondary plant metabolite found in some nectars that affects foraging in pollinators. In honeybees, caffeine increases foraging and recruitment to mediocre food sources, which might benefit the plant, but potentially harms the colonies. For the largest group of social bees, the stingless bees, the effect of caffeine on foraging behaviour has not been tested yet, despite their importance for tropical ecosystems. More generally, recruitment and foraging dynamics are not well und…

Octopamine increases individual and collective foraging in a neotropical stingless bee

2020

The biogenic amine octopamine (OA) is a key modulator of individual and social behaviours in honeybees, but its role in the other group of highly eusocial bees, the stingless bees, remains largely unknown. In honeybees, OA mediates reward perception and affects a wide range of reward-seeking behaviours. Thus, we tested the hypothesis that OA increases individual foraging effort and collective food source exploitation in the neotropical stingless bee Plebeia droryana . OA treatment caused a significant increase in the number of bees at artificial sucrose feeders and a 1.73-times higher individual foraging frequency. This effect can be explained by OA lowering the sucrose response threshold …

Sediment quality assessment using survival and embryo malformation tests in amphipod crustaceans: The Gulf of Riga, Baltic Sea AS case study

2017

Abstract The aim of this study was to assess the toxicity of bottom sediment and to estimate the potential effects of contaminated sediment on health of benthic organisms in the Gulf of Riga (eastern Baltic Sea). Two endpoints were used: survival rate (acute toxicity test) of five crustacean amphipod species and frequency of embryo malformation (samples were collected from the field) in the two species. Toxic resistance of living animals to sediment quality was measured as survival rate (%) at 25 study sites from 2010–2012. Significant differences in the toxic resistance between species were found: 80–100% for Monoporeia affinis, 70–95% for Corophium volutator, 38–88% for Pontogammarus robu…

Non-primate lentiviral vectors and their applications in gene therapy for ocular disorders

2018

Lentiviruses have a number of molecular features in common, starting with the ability to integrate their genetic material into the genome of non-dividing infected cells. A peculiar property of non-primate lentiviruses consists in their incapability to infect and induce diseases in humans, thus providing the main rationale for deriving biologically safe lentiviral vectors for gene therapy applications. In this review, we first give an overview of non-primate lentiviruses, highlighting their common and distinctive molecular characteristics together with key concepts in the molecular biology of lentiviruses. We next examine the bioengineering strategies leading to the conversion of lentiviruse…

Diagnostic accuracy of cerebrospinal fluid biomarkers measured by chemiluminescent enzyme immunoassay for Alzheimer disease diagnosis.

2020

In the last decades, an important role of cerebrospinal fluid (CSF) biomarkers for Alzheimer disease (AD) diagnosis has emerged. The evaluation of the triad consisting of 42 aminoacid-long amyloid-beta peptide (Aβ42), total Tau (tTau) and Tau phosphorylated at threonine 181 (pTau) have been recently integrated into the research diagnostic criteria of AD. For a long time, the enzyme-linked immunosorbent assay (ELISA) has represented the most commonly used method for the measurement of CSF biomarkers levels. This study aimed to assess the diagnostic accuracy of CSF biomarkers, namely Aβ42, tTau and pTau and their ratio, measured by fully automated CLEIA assay (Lumipulse). We included 96 patie…

El género Hamatolenus Hupé, 1953 (Cámbrico Inferior-Medio) en Murero y áreas adyacentes de las CadenaS Ibéricas (NE de España)

2021

Hasta la fecha, se han definido tres subgeneros de Hamatolenus Hupe, 1953: H . ( Hamatolenus ) Hupe, 1953, H . ( Myopsolenus ) Hupe, 1953 y H . ( Lotzeia ) Sdzuy, 1958. En Espana se conocian solo representantes de los dos primeros con las especies H . ( Hamatolenus ) ibericus Sdzuy, 1958 y H . ( L .) lotzei Sdzuy, 1958. Se presenta aqui el primer ejemplar de Hamatolenus ( Myopsolenus ) encontrado en la Peninsula Iberica. El analisis de la distribucion estratigrafica del genero Hamatolenus muestra su potencial para la correlacion de las materiales situados entorno al limite Cambrico Inferior y Medio, para las facies siliciclasticas en el ambito perigondwanico. Ademas, desde un punto de vista…

Botāniskā dārza sekcijas “Augu selekcija un introdukcija” tēžu krājums

2023

Latvijas Universitātes 81. starptautiskās zinātniskās konferences Botāniskā dārza sekcijas “Augu selekcija un introdukcija” sanāksme notika 2023. gada 8. februārī pulksten 13.00 LU Botāniskā dārza Lektorijā Kandavas ielā 2, Rīgā. Tēžu krājumā ir 12 referātu kopsavilkumi, kuros ir ziņots par augu kolekcijām, augu introdukciju, selekciju, augu patogēnu pētījumiem, mikropavairošanas izmēģinājumiem, kā arī purvu biotopu saglabāšanu.

Vaccinium macrocarpon (Cranberry)-Based Dietary Supplements: Variation in Mass Uniformity, Proanthocyanidin Dosage and Anthocyanin Profile Demonstrat…

2020

Vaccinium macrocarpon (syn. American Cranberry) is employed in dietary supplements (DS) with the aim to improve urinary tract well-being. This property is linked to the antiadhesion-activity of proanthocyanidins (PACs) against uropathogenic-bacteria. However, the current European legislation has been criticized for being weak and ineffective. Indeed, recent scientific works report mislabeled, contaminated, and adulterated supplements containing dangerous or unknown compounds, or sold at toxic doses. In this work, we analysed 24 DS that claim to contain cranberry, and to have a specific dosage of PACs. Our tests included the control of the good manufacturing practice according to the Europea…

Combining gestures and vocalizations to imitate sounds

2015

International audience; Communicating about sounds is a difficult task without a technical language, and naïve speakers often rely on different kinds of non-linguistic vocalizations and body gestures (Lemaitre et al. 2014). Previous work has independently studied how effectively people describe sounds with gestures or vocalizations (Caramiaux, 2014, Lemaitre and Rocchesso, 2014). However, speech communication studies suggest a more intimate link between the two processes (Kendon, 2004). Our study thus focused on the combination of manual gestures and non-speech vocalizations in the communication of sounds. We first collected a large database of vocal and gestural imitations of a variety of …