Search results for "bee"

Honeybees can recognise images of complex natural scenes for use as potential landmarks

2008

SUMMARY The ability to navigate long distances to find rewarding flowers and return home is a key factor in the survival of honeybees (Apis mellifera). To reliably perform this task, bees combine both odometric and landmark cues,which potentially creates a dilemma since environments rich in odometric cues might be poor in salient landmark cues, and vice versa. In the present study, honeybees were provided with differential conditioning to images of complex natural scenes, in order to determine if they could reliably learn to discriminate between very similar scenes, and to recognise a learnt scene from a novel distractor scene. Choices made by individual bees were modelled with signal detec…

Conversion of nadir, narrowband reflectance in red and near-infrared channels to hemispherical surface albedo

1997

Abstract Measured nadir-viewed narrow-band reflectanees in red and near infrared channels simulating AVHRR Channels 1 and 2 are compared with measured integrated solar spectrum hemispherical albedos. Reflectanees and albedos were measured from an aircraft over four widely different vegetation surfaces in southeastern Tasmania (Australia). A linear function is used to simultaneously correct for narrow band to broad band conversion errors and to convert nadir viewed reflectances to hemispherical albedos. While the application of the conversion equation presented is limited to the vegetation types of the study, the equation is independent of vegetation type. Results indicate that the reflectan…

Multi-mycotoxin determination in barley and derived products from Tunisia and estimation of their dietary intake.

2017

A study on raw barley and derived products (barley soup and beers) was carried out to determine the natural presence of twenty-four mycotoxins by both liquid chromatography and gas chromatography coupled to tandem mass spectrometry (MS/MS). The developed multi-mycotoxin procedure was based on both SLE and QuEChERS extraction steps. 66% of analyzed samples presented mycotoxin contamination and only one sample, which was soup of barley (6 ng/g), exceeded the maximum level (ML) established by EU for OTA (5 ng/g). Raw barley was the most contaminated matrix (62%), which concentrations ranged from 1.70 to 287.13 ng/g) and type of detected mycotoxins (DON, 15AcDON, NEO, NIV, HT2, FB1, OTA, ENA, E…

Aportaciones documentales sobre cruces de orfebrería valencianas. Siglos XIV y XV

2020

The article intends to make a contribution of new documentary references, from the notarial funds of the Valencian archives, in which news about parish crosses and Lignum Crucis from the silversmith center of Valencia during the fourteenth and fifteenth centuries are collected. The importance of these typologies lies in being the main elements of Christian worship, so it was an essential piece in each parish that allowed the provision in them of models of varied typology and functionality; for that reason they are conserved from altar crosses, cross-shaped reliquaries ?known as Lignum Crucis or Veracruz ?to processional crosses, larger and representative of the parish community to which it …

Carnaval y música: una breve semblanza de la Tuna Compostelana de 1888

2021

At the end of the 19th century, Spanish carnivals have been marked by the participation of the different tunas or also known as, estudiantinas. These groups achieved significant relevance in Galicia, especially in the city of Compostela, which, year after year, encouraged and supported the formation of groups of this nature to liven up the carnivals in the different Spanish cities. Although, different from its predecessors, the Santiago Tuna of 1888 ventured and made its mark in history, thanks to its intrepidity in having been the first Galician group that crossed the borders and enlivened the carnivals in the cities of the neighboring country, Portugal. This research, approached from a hi…

Estudios previos y propuesta de intervención en las pinturas murales, esculturas y ornamentos de la Real Parroquia de los Santos Juanes de Valencia

2020

Throughout this article, the most representative aspects of the previous studies and the intervention proposal, carried out for the restoration of the paintings, sculptures and ornaments of the Royal Parish of the Santos Juanes in Valencia, are exposed. A project of this magnitude involves the effort and dedication of a great team, resulting in one-year work with exhaustive and constant research with the purpose of safeguarding the heritage assets of the church. With this article we want to make known the importance that these previous studies acquire. Been essential since they are the starting point and the basis for the execution of the restoration works that will be carried out during fo…

Santo Dominguito de Val: La ?tradición? como arma arrojadiza a disposición de los poderes establecidos

2019

This study focuses, from a short story of the blood libel of Saint Dominguito de Val, on answering the questions of when and why the ?tradition? was made about this saint, and the specific moments of his Revitalization until the end of the 17th century. Although the short story of the death of this infant has been occupied by the most diverse writers of the sixteenth and seventeenth centuries, we take as reference the master Espés and the chroniclers Blancas, Andrés de Uztarroz and Dormer.

Characterization of field isolates of Trichoderma antagonistic against Rhizoctonia solani.

2010

The aim of the present study was to characterize sixteen isolates of Trichoderma originating from a field of sugar beet where disease patches caused by Rhizoctonia solani were observed. Use of both molecular and morphological characteristics gave consistent identification of the isolates. Production of water-soluble and volatile inhibitors, mycoparasitism and induced systemic resistance in plant host were investigated using in vitro and in vivo tests in both sterilized and natural soils. This functional approach revealed the intra-specific diversity as well as biocontrol potential of the different isolates. Different antagonistic mechanisms were evident for different strains. The most antag…

Catalogue de la collection de Coléoptères de M. le Baron Dejean

1821

Latvijas alus iespēju analīze eksportam uz Latīņameriku

2022

Maģistra darba tēma ir “Analīze par Latvijas alus eksporta iespējām Latīņamerikā”. Darba autore ir Jarlotte Camila Quintero Martinez un darba vadītājs - Prof., Erika Sumilo. Maģistra darba mērķis ir noteikt, kurš modelis tiks izmantots starptautiskā tirgus atlasei, un veikt Latīņamerikas tirgus izpēti, lai noskaidrotu, kura šī reģiona valsts būtu piemērotākā Latvijas alus eksportam. Lai sasniegtu maģistra darba mērķi, tiek veikta Latīņamerikas valstu izpēte, īstenota teorētiskā materiāla analīze par starptautisko tirgus atlases modeļu raksturojumu, kā arī riska pārvaldības un eksporta barjerām, tā rezultātā nosakot valsti ar labāko vidi Latvijas alus eksportam. Maģistra darbs sastāv no piec…