Search results for "ToP"
showing 10 items of 17685 documents
Benthic foodweb structure in a large shallow lake studied by stable isotope analysis
2014
The benthic foodweb structure of Lake Võrtsjärv, a large (270 km2), shallow, and turbid Estonian lake, was evaluated based on C and N stable-isotope signatures (δ13C, δ15N). Variation in δ13C between sampling sites was not related to site proximity to the littoral zone or the more vegetated southern part of the lake, but rather appeared to be influenced by in-situ site peculiarities. δ13C was stable temporally and between functional feeding groups, a result implying that the whole benthic food web of the lake relies largely on the same C source admixture, essentially particulate organic matter (POM). Thus, the foodweb composition of Lake Võrtsjärv is remarkably homogeneous given the lake’s …
Dependence of Arctic char (Salvelinus alpinus L.) on littoral and pelagic energy sources in a subarctic lake, Saanajärvi
2007
The identity of the tropical African Polichne mukonja Griffini, 1908 (Orthoptera, Tettigoniidae, Phaneropterinae)
2016
Polichne mukonja Griffini, 1908 from Cameroon was hitherto known only from the holotype preserved at the Royal Belgian Institute of Natural Sciences, Brussels. This was probably due to the fact that the genus Polichne Stål, 1874 distributed only in Australia and Papua New Guinea. In view of this distribution, the tropical African species was therefore overlooked in the African literature. The recent discovery of two specimens at the Naturhistorisches Museum, Vienna, now provides us with a better understanding of the identity of this taxon, which is related to the African genus Catoptropteryx Karsch, 1890. Polichne mukonja is here transferred to a new genus Griffinipteryx and both taxa are p…
The small protein SCO2038 modulates tryptophan biosynthesis and morpho-physiological differentiation in Streptomyces coelicolor
2016
In Streptomyces coelicolor small open reading frames were identified in several amino acids biosynthetic gene clusters, like SCO2038 (trpX) in the tryptophan trpCXBA locus. Here, the role of SCO2038, encoding a 63 amino acid protein, was investigated by both phenotypic and molecular analyses. A SCO2038 knockout mutant strain showed a delayed growth on minimal medium (MM), compromised actinorhodin biosynthesis and poor sporulation. The capability of this mutant to grow on MM was restored by tryptophan’s and its precursors’ supplementation. Pulldown and bacterial two hybrid assays revealed SCO2038 interaction with PepA, which is putatively involved in the metabolism of serine, glycine and cys…
Politiikasta-raati: Näkökulmia ilmastomuutokseen
2021
Nyt kun maailma seuraa YK:n ilmastokokousta Glasgowssa, on hyvä hetki miettiä, miten ilmastonmuutoksesta pitäisi puhua. Kolme asiantuntijaa pohtivat, mitkä näkökulmat keskustelusta puuttuvat. nonPeerReviewed
Utopian Education : May the Hope Be With You
2020
Toivon suuntaan
2020
Viime vuosina on huonoja uutisia riittänyt: ilmastonmuutos, autoritaariset ja valehtelevat poliittiset johtajat, viimeisimpänä maailmanlaajuinen koronaviruspandemia. Monenlaiset riskit ja uhat tuntuvat maailmassa lisääntyvän koko ajan ja helposti tuntuu siltä, että asiat menevät aina vaan huonompaan suuntaan. Tässä hyvin erikoisessa tilanteessa tuntuu ehkä naiivilta puhua toivosta. Muutos on mahdollista vain jos on toivoa, ja tämä pätee sekä yksityisten ihmisten että yhteisöjen suhteen. Siksi on tärkeää, että on olemassa ihmisiä, ammatteja ja liikkeitä, jotka antavat toivoa. nonPeerReviewed
Domesticating the future?: Citizen’s income discussion in Estonia
2018
ABSTRACTCitizen’s income is an idea that is currently gaining ground in many parts of the world. The prospect of disappearing jobs and social exclusion that the globalized world faces has given the...
The evaluation of tumor budding in oral tongue squamous cell carcinoma patients: a novel prognostic histopathological grading system
2020
Metabolic Changes in Tumor Microenvironment: How Could They Affect γδ T Cells Functions?
2021
The metabolic changes that occur in tumor microenvironment (TME) can influence not only the biological activity of tumor cells, which become more aggressive and auto sustained, but also the immune response against tumor cells, either producing ineffective responses or polarizing the response toward protumor activity. γδ T cells are a subset of T cells characterized by a plasticity that confers them the ability to differentiate towards different cell subsets according to the microenvironment conditions. On this basis, we here review the more recent studies focused on altered tumor metabolism and γδ T cells, considering their already known antitumor role and the possibility of manipulating th…