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Tytuł:
500 years of ecological changes recorded in subfossil Cladocera in a high-altitude, tropical lake Lago de la Luna, central Mexico
Autorzy:
Zawisza, E.
Caballero, M.
Ruiz-Fernandez, C.
Powiązania:
https://bibliotekanauki.pl/articles/2027080.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
subfossil Cladocera
crater Nevado de Toluca
lake sed i ment
Opis:
We pres ent the last 500 years of his tory of a high-al ti tude trop i cal lake Lago de la Luna lo cated at Nevado de Toluca crater, Cen tral Mex ico, based on subfossil Cladocera anal y sis. Through the stud ied sed i men tary se quence only five Cladocera spe cies were pres ent. Cladocera com mu nity was dom i nated by lit to ral spe cies (4) and among them one (Ilyocryptus nevadensis) is en demic. The de tailed anal y sis of the sed i ments (ev ery 1 cm) al lowed us to track con tem - po rary cli ma tic and anthropogenic changes. Our re sults showed that Lago de la Luna is a very sen si tive eco sys tem and has strong re sponse to cli ma tic changes. The most re mark able change in the Cladocera com mu nity was ob served between 1683–1780 yr, which was well cor re lated with the Lit tle Ice Age. PCA re sults im plied that mod ern state of the lake Lago de la Luna is very sim i lar to one 400–500 yr ago. Only one pe riod was iden ti fied when hu man im pact was of im por tance. This pe riod seemed to cor re late with changes in the lake eco sys tem due to fish in tro duc tion in the 1950s.
Źródło:
Studia Quaternaria; 2012, 29; 23-29
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental changes during the last millennium recorded in subfossil Cladocera, diatoms and sediment geochemistry from Lake El Sol (Central Mexico)
Autorzy:
Zawisza, E.
Cuna, E.
Caballero, M
Ruiz-Fernandez, A. C.
Szeroczyńska, K.
Woszczyk, W.
Zawiska, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060339.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
crater Nevado de Toluca
lake sediments
tropical alpine lake
palaeolimnology
last millennium
Opis:
High-altitude lakes, which are very sensitive ecosystems and respond rapidly to climatic changes, are one of the best targets for palaeolimnological studies. Here, we present the record of environmental changes over the last millennium that are recorded in the sediments of El Sol, a tropical, high-altitude, volcanic crater lake on the Nevado de Toluca, Central Mexico. Palaeolimnological reconstructions are based on subfossil Cladocera, diatoms, magnetic susceptibility and chemical analysis of the sediments. In general, Cladocera occurring in tropical regions, and especially at high altitude, have been studied very little. Our data indicate that in the sequence studied, the species diversity of subfossil Cladocera is very low. Only four species were recorded, and the assemblage is dominated by littoral species. Two Cladocera taxa, Alona manueli and Ilyocryptus, found at Lake El Sol are endemic. Cladocera, diatoms and the sediment chemistry show changes in Lake El Sol which are mostly related to climate. The most pronounced climatic signal was obtained for the early Little Ice Age (1350–1625 AD). This cold episode was expressed by a reduction in the frequency of zooplankton (individuals/cm2/yr) and diatoms (valves/g of dry sediment) and by changes in the organic carbon content in the sediment. Our results show that human activity was very limited throughout the study period. According to historical data the presence of humans at the lake shore was mostly occasional, usually for ceremonial and ritual purposes, and humans did not have an important influence on the lake ecosystem. Only one period was identified when human activity was important. This period corresponds to the introduction of fish into the lake at the beginning of the 20th century.
Źródło:
Geological Quarterly; 2017, 61, 1; 81--90
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of subsidies in agriculture on the value of fixed assets on agricultural farms in Poland and Spain in light of FADN data in the years 2004-2016
Wpływ subwencji w rolnictwie na wartość środków trwałych w gospodarstwach rolnych w Polsce i w Hiszpanii w świetle danych FADN w latach 2004-2016
Autorzy:
Węgrzyńska, M.
Fernandez, P.M.
Powiązania:
https://bibliotekanauki.pl/articles/1790456.pdf
Data publikacji:
2019
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Tematy:
środki trwałe w rolnictwie
FADN
rachunkowość rolna
subwencje w rolnictwie
fixed assets in agriculture
agricultural accounting
subsidies in agriculture
Opis:
The article presents changes in the value of fixed assets in relation to the amounts of subsidies directed to farms in two selected European Union countries – Poland and Spain – in the years 2004-2016. Both of these countries were selected on the basis of similar qualitative and quantitative characteristics that are characteristic of agriculture. An additional determinant of the choice of these countries was a similar economic situation before and after accession to the structures of the European Union. The article consists of an introduction, where the essence and significance of fixed assets in agriculture is presented, followed by the material and methodology of the research. A comparison of fixed assets of both countries was based on statistical data from the European Farm Accountancy Data Network (FADN). Analysis of material shows that, in 2004-2016, in Poland and Spain, the value of fixed assets was strongly positively correlated with total subsidies – excluding subsidies on investment (SE605), total direct payments (SE606), subsidies on intermediate consumption (SE625) and decoupled payments (SE630). Additionally, it was determined that, in Poland and Spain, the value of fixed assets was strongly negatively correlated with total subsidies on crops (SE610) and other subsidies (SE699). The value of property, plant and equipment in Poland and Spain increased gradually during the period under review.
W artykule określono zmiany wartości środków trwałych w odniesieniu do kwot subwencji kierowanych do gospodarstw rolnych w dwóch wybranych krajach Unii Europejskiej – Polsce i Hiszpanii – w latach 2004-2016. Oba te kraje zostały wybrane na podstawie zbliżonych cech jakościowych i ilościowych charakterystycznych dla rolnictwa. Dodatkową determinantą wyboru tych krajów była podobna sytuacja ekonomiczna przed i po przystąpieniu tych krajów do Unii Europejskiej. Porównanie środków trwałych obu krajów oparto na danych statystycznych pochodzących z European Farm Accountancy Data Network (FADN). Z analizy materiału wynika, że w latach 2004-2016 w Polsce i w Hiszpanii wartość środków trwałych była silnie dodatnio skorelowana z dopłatami do działalności operacyjnej (SE605), płatnościami bezpośrednimi (SE606), dopłatami do zużycia bezpośredniego (SE625), a także z jednolitymi płatnościami obszarowymi oraz dodatkowymi płatnościami (SE630). Dodatkowo określono, że w Polsce i w Hiszpanii wartość środków trwałych była silnie ujemnie skorelowana z dopłatami do produkcji roślinnej (SE610) oraz pozostałymi dopłatami (SE699). Wartość środków trwałych w Polsce i w Hiszpanii w okresie objętym badaniem ulegała sukcesywnemu zwiększeniu.
Źródło:
Annals of The Polish Association of Agricultural and Agribusiness Economists; 2019, 21, 4; 551-560
2657-781X
2657-7828
Pojawia się w:
Annals of The Polish Association of Agricultural and Agribusiness Economists
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some comments on compositional analysis in management and production engineering
Autorzy:
Vives-Mestres, M.
Martín-Fernández, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/406810.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
production composition
log ratio analysis
clr-biplot
CoDa dendrogram
ternary diagram
simplex
Opis:
This paper introduces the most basic concepts of the compositional analysis of data with a simple but real example form the Management and Production Engineering (MPE) field. Compositional Data (CoDa) are vectors of positive elements that represent parts of a whole and are widely found in MPE, i.e. production times, resource composition, percentage utilization of work stands, waste components. . . The need for an analysis based on ratios of components (or better log-ratios of components) is illustrated step by step, and findings are compared to the corresponding standard methods applied to raw compositions. The paper also exposes the principles of CoDa analysis and presents two basic descriptive tools suitable for CoDa: the clr-biplot and the CoDa dendrogram. The example is a time series, from 1994 to 2013, of motor vehicle production in 8 countries and regions.
Źródło:
Management and Production Engineering Review; 2015, 6, 2; 63-72
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of mutagenesis in the modification of the fatty acid profile of oilseed crops
Autorzy:
Velasco, L
Perez-Vich, B.
Fernandez-Martinez, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/2043643.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oil seed
mutagenesis
induced mutation
fatty acid
crop
modification
Źródło:
Journal of Applied Genetics; 1999, 40, 3; 185-209
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Software Startups – A Research Agenda
Autorzy:
Unterkalmsteiner, M.
Abrahamsson, P.
Wang, X. F.
Nguyen-Duc, A.
Shah, S.
Bajwa, S. S.
Baltes, G. H.
Conboy, K.
Cullina, E.
Dennehy, D.
Edison, H.
Fernandez-Sanchez, C
Garbajosa, J.
Gorschek, T.
Klotins, E.
Hokkanen, L.
Kon, F.
Lunesu, I.
Marchesi, M.
Morgan, L.
Oivo, M.
Selig, C.
Seppänen, P.
Sweetman, R.
Tyrväinen, P.
Ungerer, C.
Yagüe, A.
Powiązania:
https://bibliotekanauki.pl/articles/953060.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
software startup
research agenda
software-intensive systems
Opis:
Software startup companies develop innovative, software-intensive products within limited time frames and with few resources, searching for sustainable and scalable business models. Software startups are quite distinct from traditional mature software companies, but also from micro-, small-, and medium-sized enterprises, introducing new challenges relevant for software engineering research. This paper’s research agenda focuses on software engineering in startups, identifying, in particular, 70+ research questions in the areas of supporting startup engineering activities, startup evolution models and patterns, ecosystems and innovation hubs, human aspects in software startups, applying startup concepts in non-startup environments, and methodologies and theories for startup research. We connect and motivate this research agenda with past studies in software startup research, while pointing out possible future directions. While all authors of this research agenda have their main background in Software Engineering or Computer Science, their interestin software startups broadens the perspective to the challenges, but also to the opportunities that emerge from multi-disciplinary research. Our audience is therefore primarily software engineering researchers, even though we aim at stimulating collaborations and research that crosses disciplinary boundaries. We believe that with this research agenda we cover a wide spectrum of the software startup industry current needs.
Źródło:
e-Informatica Software Engineering Journal; 2016, 10, 1; 89-123
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consumer affinity as a key factor to mitigate reluctance to buy foreign products: The moderating role of organic and induced image to counteract negative communication campaigns and image crises
Autorzy:
Serrano-Arcos, M. Mar
Sanchez Fernández, Raquel
Pérez-Mesa, Juan Carlos
Powiązania:
https://bibliotekanauki.pl/articles/39990489.pdf
Data publikacji:
2024
Wydawca:
Instytut Badań Gospodarczych
Tematy:
reluctance to buy
consumer affinity
perceived value and risk
organic and induced image
counteracting negative campaigns
Opis:
Research background: Anti-consumption practices, in particular consumers’ reluctance to buy (RTB) foreign products, are increasingly common in today’s globalised and interconnected markets. This phenomenon is accentuated by the impact of negative consumer dispositions (e.g., animosity or ethnocentrism), which contribute to an unfavourable perception of foreign products and, consequently, increase RTB. However, knowledge about possible factors that may mitigate this RTB foreign products is limited, and even less is known about the influence that positive dispositions (e.g., affinity) may have on consumer perceptions and consumption/non-consumption decisions. Moreover, consumers are inundated with information from various sources, which can significantly influence their perceptions and image of a product-country, especially in a context associated with negative communication campaigns and image crises. Purpose of the article: This research delves into the study of consumer affinity towards a foreign country, understood as an emotional feeling or positive disposition of a consumer that may mitigate their RTB foreign products, which often results from negative communication campaigns and a country-product image crisis. In addition, its influence on perceived risk and value, and the impact of these on RTB, is investigated. The moderating effect of the organic and induced image formed by the consumer on the risk-value relationship is also analysed, determining whether the induced image undermines this relationship. Methods: The empirical study focuses on the Spanish agri-food sector, which has been the subject of negative communication campaigns and image crises in foreign markets. The conceptual model was tested in a sample of German consumers, as Germany is the primary destination country for these products and has also been the origin of several image crises in this sector. PLS-SEM was used to validate the proposed hypotheses. Findings & value added: This research underlines the importance of fostering feelings of affinity towards a country and its products as a means to counteract negative campaigns, increase perceived value and mitigate RTB in foreign destination markets. Companies and public institutions, which influence the formation of the induced image in consumers, can contribute to improving consumers’ perception of a product-country. By shedding light on these dynamics, this study offers valuable insights for companies trying to cope with image crises fuelled by negative communication campaigns, which are increasingly prevalent in the competitive international landscape.
Źródło:
Oeconomia Copernicana; 2024, 15, 2; 717-763
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of NADPH oxidase in the regulation of peroxisome dynamics
Autorzy:
Rodriguez-Serrano, M.
Romero-Puerta, M.
Sanz-Fernandez, M.
Cardenas, K.
Sandalio, L.
Powiązania:
https://bibliotekanauki.pl/articles/81177.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
reactive oxygen species
signalling network
peroxisome dynamics
NADPH oxidase
Arabidopsis
oxidative stress
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Template Assisted Deposition of Ferromagnetic Nanostructures: from Antidot Thin Films to Multisegmented Nanowires
Autorzy:
Prida, V.M.
Salaheldeen, M.
Pfitzer, G.
Hidalgo, A.
Vega, V.
González, S.
Teixeira, J.
Fernández, A.
Hernando, B.
Powiązania:
https://bibliotekanauki.pl/articles/1032144.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.70.Kw
75.75.-c
75.70.-i
75.70.Rf
Opis:
The growth of nanostructured materials by means of different deposition methods employing nanoporous anodic aluminum oxide membranes as patterned templates has been widely used during last years due to the outstanding features displayed by these nanoporous templates. Here we report on the synthesis, morphology and magnetic properties exhibited by novel magnetic 1D and 2D nanostructured materials having nanowire or antidot thin films geometry, respectively, together to that of geometrically diameter modulated ferromagnetic nanowires. Their magnetic properties will be analyzed and discussed based on the different anisotropic behavior derived from their morphological and microstructural features.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 822-827
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcium phosphate preservation of faecal bacterial negative moulds in hyaena coprolites
Autorzy:
Pesquero, M.D.
Souza-Egipsy, V.
Alcala, L.
Ascaso, C.
Fernandez-Jalvo, Y.
Powiązania:
https://bibliotekanauki.pl/articles/22871.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
The vertebrate fossil locality of La Roma 2, Spain (Upper Miocene, Late Vallesian, MN10) is characterised by a high abundance of mammalian coprolites, which provide direct clues to the diets and habitats of the organisms that produced them. X-ray diffraction analysis showed a sample of hyaena (cf. Lycyaena chaeretis) coprolites to be mostly composed of calcium phosphate. Ultrastructural SEM and TEM studies revealed three successive phases of preservation, including an initial phase of mineralisation that produced microspherulites within a very fine-grained cement. This indicates that most of the calcium phosphate present in the coprolites precipitated rapidly, which in turn facilitated the formation of negative moulds of faecal bacteria within the coprolite matrix.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cryogenic treatment and PVD coatings to augment wear resistance of tool steels
Zastosowanie obróbki kriogenicznej i powłok PVD do zwiększenia odporności na ścieranie stali narzędziowych
Autorzy:
Peña-Parás, L.
Trejo Montemayor, L. A.
Ramírez Cantú, S.
Fernández Corona, R. D.
Reyna Reyes, M.
Powiązania:
https://bibliotekanauki.pl/articles/190739.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
PVD coatings
tool steels
cryogenic treatment
powłoki PVD
stale narzędziowe
obróbka kriogeniczna
Opis:
The influence of deep cryogenic treatment and PVD coatings on the wear resistance and toughness of D2, S7, H13 and M4 tool steels were studied. Three different PVD coatings were applied after heat treatment: AlCrN, TiAlN, TiCrN. In order to research the wear resistance, the ball-on-disk tribological test was used per ASTM G-99; material toughness was evaluated through the Charpy-V test. Wear scars were examined through optical microscopy to calculate the volume loss. It is found that cryogenic treatment improved wear resistance and toughness up to 63% and 12% respectively. The material with the best combination of wear resistance properties and toughness was S7 with cryogenic treatment and TiAlN coating.
W pracy przedstawiono wyniki badań wpływu obróbki kriogenicznej i powłok PVD na odporność na ścieranie oraz udarność stali narzędziowych D2, S7, H13 i M4. Zastosowano trzy różne powłoki PVD: AlCrN, TiAlN, TiCrN, które wcześniej poddano obróbce cieplnej. W celu zbadania odporności na zużycie przeprowadzono badania z użyciem testera kula-tarcza zgodnie z wymogami normy ASTM G-99. Udarność została oceniona z wykorzystaniem młota Charpy’ego. Zużycie objętościowe zostało zmierzone za pomocą mikroskopu optycznego. Stwierdzono, że obróbka kriogeniczna polepszyła odporność na ścieranie o 63%, a udarność o 12%. W wyniku przeprowadzonych badań stwierdzono, że materiałem o najlepszych właściwościach na ścieranie i udarność jest stal narzędziowa S7 poddana obróbce kriogenicznej i pokryta powłoką TiAlN.
Źródło:
Tribologia; 2013, 3; 109-117
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systematic revision of a Miocene sperm whale from Patagonia, Argentina, and the phylogenetic signal of tympano-periotic bones in Physeteroidea
Autorzy:
Paolucci, F.
Buono, M.R.
Fernandez, M.S.
Cuitino, J.
Powiązania:
https://bibliotekanauki.pl/articles/2082284.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Mammalia
Physeteroidea
Preaulophyseter gualichensis
Miocene
Patagonia
Argentina
Opis:
Sperm whales (Physeteroidea) include today only two genera of morphologically disparate odontocetes: the largest toothed whale known (Physeter macrocephalus) and small sized forms (Kogia spp.). In contrast, their fossil record indicates a high diversity for the group during the Miocene, with over 20 species recognized. Miocene marine sediments from Patagonia (Argentina) record this diversity, including at least five species. Among them, Preaulophyseter gualichensis, from the Miocene of Gran Bajo del Gualicho Formation, has been one of the most enigmatic. Despite the fragmentary nature of the type and referred materials (isolated teeth and periotics), which casts some doubts on its validity, this species has not been revised since its original description. In this contribution, we re-describe the materials referred to P. gualichensis, revise the taxonomic status of the species and evaluate the phylogenetic signal of ear bones among Physeteroidea. Our results indicate that the physeteroid tympano-periotic complex morphology is poorly diagnostic at the species level. Intraspecific variation (including ontogeny and sexual dimorphism) and/or taphonomic processes cannot be ruled out as the causes of the minor differences observed among specimens. We suggest that sperm whale tympano-periotics retain many plesiomorphic characters and are diagnostic only between kogiids and non-kogiid physeteroids. Based on the fragmentary and isolated state of the studied specimens, and the lack of diagnostic characters in both teeth and periotics, we consider P. gualichensis as nomen dubium and we re-assign the referred specimens as Physeteroidea indet. A conservative morphology of the tympano-periotic and, to a lesser extent, the nasal complex in sperm whales, might result from the morpho-functional constraints imposed by a highly specialized but successful echolocation system.
Źródło:
Acta Palaeontologica Polonica; 2021, 66, 1; 63-76
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie nowoczesnych cieczy roboczych w chwytakach robotów
Autorzy:
Osowski, K.
Fernández, M. A.
Olszak, A.
Huang, C. Y.
Kęsy, A.
Chang, J. Y.
Kęsy, Z.
Powiązania:
https://bibliotekanauki.pl/articles/305102.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Druk-Art
Tematy:
chwytaki
sprzęgła wiskotyczne
ciecz elektroreologiczna
ciecz magnetoreologiczna
grasper
viscous coupling
electro-medical liquid
magnetorheological fluid
Opis:
W artykule omówiono wykorzystanie cieczy o nietypowych właściwościach w chwytakach robotów. Ciecze elektro- i magnetoreologiczne, zmieniające swoje właściwości reologiczne w obecności pola elektrycznego lub magnetycznego, zastosowano jako ciecze robocze sprzęgieł wiskotycznych, wchodzących w skład układu przeniesienia napędu chwytaków. Przedstawiono dwa rozwiązania konstrukcyjne prototypowych chwytaków robotów przemysłowych z takimi sprzęgłami. Rozważono również ciecze luminescencyjne, reagujące na nacisk, pod kątem ich zastosowania w mikroczujnikach siły nacisku szczęk chwytaka.
The paper discusses the use of modern fluids with untypical properties in robot grippers. The electro- and magnetorheological fluids, changing their rheological properties in the presence of an electric or magnetic field, were used as working fluids of viscous clutches included in the griper drive transmission system. Two design solutions were presented for prototype industrial robot grippers with such clutches. Luminescent pressure-sensitive fluids have also been considered for their use in the micro-sensors for sensing force of the gripper’s jaw.
Źródło:
Napędy i Sterowanie; 2018, 20, 3; 100-106
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of significant wavelengths for identifying and classifying Fusarium oxysporum during the incubation period and water stress in Solanum lycopersicum plants using reflectance spectroscopy
Autorzy:
Ortiz, J.C.M.
Carvajal, L.M.H.
Fernandez, V.B.
Powiązania:
https://bibliotekanauki.pl/articles/65540.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Spectroscopy has become one of the most used non-invasive methods to detect plant diseases before symptoms are visible. In this study it was possible to characterize the spectral variation in leaves of Solanum lycopersicum L. infected with Fusarium oxysporum during the incubation period. It was also possible to identify the relevant specific wavelengths in the range of 380–1000 nm that can be used as spectral signatures for the detection and discrimination of vascular wilt in S. lycopersicum. It was observed that inoculated tomato plants increased their reflectance in the visible range (Vis) and decreased slowly in the near infrared range (NIR) measured during incubation, showing marked differences with plants subjected to water stress in the Vis/NIR. Additionally, three ranges were found in the spectrum related to infection by F. oxysporum (510–520 nm, 650–670 nm, 700–750 nm). Linear discriminant models on spectral reflectance data were able to differentiate between tomato varieties inoculated with F. oxysporum from healthy ones with accuracies higher than 70% 9 days after inoculation. The results showed the potential of reflectance spectroscopy to discriminate plants inoculated with F. oxysporum from healthy ones as well as those subjected to water stress in the incubation period of the disease.
Źródło:
Journal of Plant Protection Research; 2019, 59, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of chambered hexactinellid sponges from the Palaeozoic
Autorzy:
Nose, M.
Vodrazka, R.
Fernandez, L.-P.
Mendez-Bedia, I.
Powiązania:
https://bibliotekanauki.pl/articles/20593.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
A new chambered hexactinellid sponge, Casearia devonica sp. nov., is described from the Lower Devonian of northern Spain (Cantabrian Mountains). The fossil represents the first evidence of chambered hexactinellid sponges from the Palaeozoic and the oldest representative of the order Hexactinosida. Casearia devonica sp. nov. occurred within small metre-sized mud mounds that developed in deeper water below the storm wave base.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 56

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