Search results for "Metal"

Fitokumulacja metali ciężkich w wybranych gatunkach ziół

2015

Celem przeprowadzonych badań była ocena fitokumulacji metali ciężkich w wybranych gatunkach ziół. Do badań pobrano pięć gatunków ziół wieloletnich: Mentha piperita L., Mentha rotundifolia (L.) Huds., Melissa officinalis L., Origanum vulgare, Rosmarinus officinalis, Thymus vulgaris L. Z poletka doświadczalnego położonego w Opolu (południowo-zachodnia Polska) pobrano próbki liści ziół oraz pięć zintegrowanych próbek gleby. W materiale badawczym pobranym w sierpniu 2015 roku, po mineralizacji w mineralizatorze mikrofalowym, oznaczono metale ciężkie: Mn, Fe, Ni, Cu, Zn, Cd i Pb z wykorzystaniem aparatu AAS iCE 3500 firmy Thermo Electron Corporation (USA). Wyniki przeprowadzonych badań zinterpre…

Does differential iron supply to algae affect Daphnia life history? : An ionome-wide study

2019

The availability of iron (Fe) varies considerably among diet items, as well as ecosystems. Availability of Fe has also changed due to anthropogenic environmental changes in oceanic as well as inland ecosystems. We know little about its role in the nutrition of ecologically important consumers, particularly in inland ecosystems. Physiological studies in several taxa indicate marked effects of dietary Fe on oogenesis. We predicted that differential Fe supply to algae will impact algal Fe concentration with consequences on the life history of the freshwater grazer, Daphnia magna. We found that algal Fe concentration increased with Fe supply, but did not affect algal growth, indicating that the…

Problematyka kształtowania zrównoważonych systemów transportowych peryferyjnych obszarów miast na przykładzie dzielnicy przemysłowej Metalchem w Opolu

2015

Zapewnienie efektywnego funkcjonowania systemów transportowych obszarów peryferyjnych w miastach bywa niejednokrotnie trudne, na co składa się wiele przyczyn. Celem artykułu jest przedstawienie wyników badań dotyczących poziomu zrównoważenia, w tym funkcjonalności, transportu w peryferyjnej dzielnicy przemysłowej Opola Metalchem, jak też ocena planów władz miasta co do zmian w systemie transportowym dzielnicy. Zdiagnozowane zostały główne elementy systemu transportowego oraz problemy związane z funkcjami, jakie na badanym obszarze powinien on pełnić. Następnie omówiono plany władz miasta dotyczące zmian w zagospodarowaniu dzielnicy, w tym przekształceń systemu transportowego. Ostatnia część…

L'épée d'Onnen (Groningue, Pays-Bas), de la tourbière aux rayons X

2022

The Onnen sword was found in 1896 while exploiting a peat bog, about 1.5 m deep. It is a so-called “antennae” sword, named after the spirals at the top of the pommel and it dates back to last phase of the Bronze Age (ca. 9th century BC). The Groninger Museum now curates the sword with inventory number 1896/I 4. Although this sword is already mentioned in the archaeological literature, it was never correctly published. Its recent study in the cultural heritage agency of The Netherlands gives us a good opportunity to make a detailed presentation as well as to investigate its production techniques to discuss its possible origins.

Évaluation des indices de métallurgie monétaire au second âge du Fer

2017

International audience

Bronze of the Living, Bronze of the Dead

2023

In the area considered here, the funerary goods found in burials dating from the Late MBA to the beginning of the LBA (Bz C2 to Ha A1) are particularly rich, with a variety of bronze objects such as ornaments, clothing accessories, tools and weapons. Contemporary settlements only occasionally provide “lost” metal objects and deposits on land or in rivers remain rare. Is it possible from the objects found in excavated contexts (burials, settlements, hoards) alone to evaluate the bronze that circulated during the Late Bronze Age? How representative are the objects in these contexts of bronze production and do they really indicate the metal held within economic exchange networks? How can we de…

Linguistica Lettica, Nr. 5

1999

Autobiographical texts written by learners of Catalan as an Additional Language: From formative needs to reflection in the teaching of narrative genr…

2022

In this article we analyse autobiographical narrative texts written by university students studying Catalan as an Additional Language at a CEFR (2020) B1 level. The goal is to analyse the formative needs related to the writing of this genre in order to foster metadiscursive reflection in the classroom that will allow students to improve their written output. To this end, we analyzed a corpus of 39 autobiographies at both the macrotextual level (i.e., rhetorical moves) and the microtextual level (i.e., deictic elements which channel the narrative’s organization). Our results show that the problems that these texts present for students are related to awareness of the elements that define the …