Search results for "kuori"
showing 10 items of 105 documents
Effects of a glyphosate-based herbicide on survival and oxidative status of a non-target herbivore, the Colorado potato beetle (Leptinotarsa decemlin…
2019
Glyphosate is the globally most used herbicide against a wide range of weeds. Glyphosate has been considered safe to animals as it mainly targets physiological pathways in plants. However, recent toxicological studies have revealed that glyphosate can cause various toxic effects also on animals. In this study, we investigated the direct toxic effects of a glyphosate-based herbicide (GBH, Roundup® Bio) on 1) survival and 2) oxidative status of a non-target herbivore by using Colorado potato beetles (Leptinotarsa decemlineata), originating from Poland and USA, as model species. Larvae were randomly divided into three groups: 1) high concentration (100% Roundup Bio, 360 g/l), 2) low concentrat…
Examining stability of independent component analysis based on coefficient and component matrices for voxel-based morphometry of structural magnetic …
2018
Independent component analysis (ICA) on group-level voxel-based morphometry (VBM) produces the coefficient matrix and the component matrix. The former contains variability among multiple subjects for further statistical analysis, and the latter reveals spatial maps common for all subjects. ICA algorithms converge to local optimization points in practice and the mostly applied stability investigation approach examines the stability of the extracted components. We found that the practically stable components do not guarantee to produce the practically stable coefficients of ICA decomposition for the further statistical analysis. Consequently, we proposed a novel approach including two steps: …
Neural contribution to postactivation potentiation
2015
The current study was designed to investigate the contribution of neural factors to postactivation potentiation (PAP). Neuromuscular function (i.e. twitches, H-reflexes, motor evoked potentials, and voluntary isometric ballistic contractions) of 8 power-trained (POW) and 8 endurance-trained (END) athletes was recorded before and after a 8-second maximal isometric conditioning contraction (CC) to induce PAP, to elucidate discriminating neural factors in exploiting PAP that might arise from the former training background compared to the latter. After CC, twitch peak force and rate of force development were significantly increased, with higher potentiation in POW (29 ± 11% and 64 ± 24%) than E…
Estimating Tree Health Decline Caused by Ips typographus L. from UAS RGB Images Using a Deep One-Stage Object Detection Neural Network
2022
Various biotic and abiotic stresses are causing decline in forest health globally. Presently, one of the major biotic stress agents in Europe is the European spruce bark beetle (Ips typographus L.) which is increasingly causing widespread tree mortality in northern latitudes as a consequence of the warming climate. Remote sensing using unoccupied aerial systems (UAS) together with evolving machine learning techniques provide a powerful tool for fast-response monitoring of forest health. The aim of this study was to investigate the performance of a deep one-stage object detection neural network in the detection of damage by I. typographus in Norway spruce trees using UAS RGB images. A Scaled…
Facile synthesis of sustainable activated biochars with different pore structures as efficient additive-carbon-free anodes for lithium- and sodium-io…
2022
The present work elucidates facile one-pot synthesis from biomass forestry waste (Norway spruce bark) and its chemical activation yielding high specific surface area (SBET) biochars as efficient lithium- and sodium-ion storage anodes. The chemically activated biochar using ZnCl2 (Biochar-1) produced a highly mesoporous carbon containing 96.1% mesopores in its structure as compared to only 56.1% mesoporosity from KOH-activated biochars (Biochar-2). The latter exhibited a lower degree of graphitization with disordered and defective carbon structures, while the former presented more formation of ordered graphite sheets in its structure as analyzed from Raman spectra. In addition, both biochars…
Exploratory behaviour is not related to associative learning ability in the carabid beetle Nebria brevicollis
2020
Recently, it has been hypothesised that as learning performance and animal personality vary along a common axis of fast and slow types, natural selection may act on both in parallel leading to a correlation between learning and personality traits. We examined the relationship between risk-taking and exploratory behaviour and associative learning ability in carabid beetle Nebria brevicollis females by quantifying the number of trials individuals required to reach criterion during an associative learning task (‘learning performance’). The associative learning task required the females to associate odour and direction with refugia from light and heat in a T-maze. Further, we assessed learning …
Cost of reproduction in a seed beetle : a quantitative genetic perspective
2006
Lisääntymisestä on kustannuksia, jotka ilmenevät lyhentyneenä elinikänä. Elinikä ja lisääntymisestä aiheutuvat kustannukset ovat geenien määräämiä.- Väitöskirjatyössäni tutkin lisääntymisen kustannuksia koirailla. Tutkimuskohteena käytin Callosobruchus maculatus - jyväkuoriaisia, jotka ovat trooppisia papujen tuholaisia. Kyseinen laji on paljon käytetty evoluutioekologian alan mallilaji. Naarailla on tehty runsaasti lisääntymisen kustannustutkimuksia, mutta koirailla vain muutamia tutkimuksia. Perinteisesti on ajateltu, että koiras panostaa lisääntymiseen lähinnä parittelemalla ja luovuttamalla sukusoluissaan geenejään jälkeläisilleen, Satu Paukku kertoo.Tutkimuksissa ilmeni, että koiraille…
Luontotyyppien arvottaminen perustuen sarvijäärien ja lantakuoriaisten esiintymiseen Etelä-Suomessa
2011
Tämän tutkimuksen tarkoituksena on tarkastella sarvijäärien ja lantakuoriaisten esiintymistä eri luontotyypeissä ja asettaa arvojärjestykseen Etelä-Suomessa esiintyvät luontotyypit näiden kahden lajiryhmän avulla. Tutkimukseen on otettu mukaan kaikki Suomessa esiintyvät lantakuoriais- ja sarvijäärälajit. Tämä tutkimus perustuu menetelmiltään ja aineistoltaan Tielaitoksen ekologiseen ympäristöluokitukseen sekä yksinkertaistettuun Rossin ja Kuitusen kehittämään luontotyyppien arvottamismenetelmään, jonka tarkoituksena on helpottaa maankäytön suunnittelua ja menetelmä voi toimia osana laajempaa ekologisten vaikutusten arviointia. Kullekin lajille on kirjallisuuden perusteella määritelty ensisi…
High‐resolution 3D forest structure explains ecomorphological trait variation in assemblages of saproxylic beetles
2022
1. Climate, topography and the 3D structure of forests are major drivers affecting local species communities. However, little is known about how the specific functional traits of saproxylic (wood-living) beetles, involved in the recycling of wood, might be affected by those environmental characteristics. 2. Here, we combine ecological and morphological traits available for saproxylic beetles and airborne laser scanning (ALS) data in Bayesian trait-based joint species distribution models to study how traits drive the distributions of more than 230 species in temperate forests of Europe. 3. We found that elevation (as a proxy for temperature and precipitation) and the proportion of conifers p…
Therapeutic Benefits of Music-Based Synchronous Finger Tapping In Parkinson’s Disease – an fNIRS Study Protocol for Randomized Controlled Trial in Da…
2020
Abstract Background: Music therapy improves neuronal activity and connectivity of healthy persons and patients with clinical symptoms of neurological diseases like Parkinson’s disease, Alzheimer’s Disease, and Major Depression. Despite the plethora of publications that have reported the positive effects of music interventions, little is known about how music improves neuronal activity and connectivity in afflicted patients.Methods: For patients suffering from Parkinson’s disease (PD), we propose a daily 25-minute music-based synchronous finger tapping (SFT) intervention for 8-weeks. Eligible participants with PD are split into two groups: an intervention group and a control arm. In addition…