Search results for "Arid"
showing 10 items of 1382 documents
Vene õppekeelega põhikooli õpilaste ja õpetajate hoiakud eestikeelse aineõppe suhtes vahetult enne 2007. aasta gümnaasiumireformi algust
2009
Artiklis uuritakse kvantitatiivselt üheksanda klassi õpilaste ja neid eesti keeles õpetanud pedagoogide hoiakuid osalise eestikeelse aineõppe suhtes ning analüüsitakse, millised tegurid soodustavad õpilaste positiivsete hoiakute kujunemist eesti õppekeele suhtes, pöörates erilist tähelepanu uuringus täheldatud erinevusele osa õppeaineid eesti keeles omandanud ja kõiki õppeaineid vene keeles õppinud põhikoolilõpetajate hoiakute vahel. Artikli lõpuosas vaadeldakse kvalitatiivselt eestikeelse aineõppe positiivseid ja negatiivseid mõjusid, näidatakse probleeme, millega eestikeelses aineõppes osalenud õpilased ja õpetajad on kokku puutunud, ning tutvustatakse nende pakutud võimalikke lahendusi. …
Comparative ultrastructure and carbohydrate composition of gastroliths from Astacidae, Cambaridae and Parastacidae freshwater crayfish (Crustacea, De…
2012
21 pages; International audience; Crustaceans have to cyclically replace their rigid exoskeleton in order to grow. Most of them harden this skeleton by a calcification process. Some decapods (land crabs, lobsters and crayfish) elaborate calcium storage structures as a reservoir of calcium ions in their stomach wall, as so-called gastroliths. For a better understanding of the cyclic elaboration of these calcium deposits, we studied the ultrastructure of gastroliths from freshwater crayfish by using a combination of microscopic and physical techniques. Because sugars are also molecules putatively involved in the elaboration process of these biomineralizations, we also determined their carbohy…
Dataset from: Small-scale patches of detritus as habitat for invertebrates within a Zostera noltei meadow
2021
This dataset is related to "Small-scale patches of detritus as habitat for invertebrates within a Zostera noltei meadow" (Valentina Costa, Renato Chemello, Davide Iaciofano, Sabrina Lo Brutto, Francesca Rossi)
Demo 37. Capilaridad: Ley de Jurin
2013
Objetivo: Observar el ascenso capilar para dos líquidos de tensión superficial diferente y comprobar su dependencia con el radio del tubo.
NGDO brand logos. Sense and evolution
2015
La hipótesis inicial de este artículo es que, desde mediados de los años noventa, la lógica de marca se ha extendido al ámbito de la cooperación y de la ayuda humanitaria. Que en las últimas décadas las grandes ONGD han devenido marcas postmodernas. A manera de ejemplo, hemos estudiado los logos aparecidos en los anuncios de televisión de cinco de estas organizaciones: Intermón Oxfam, Médicos Sin Fronteras, Anesvad, Ayuda en Acción y África Directo. Sin duda, el logo es el primer elemento a considerar para establecer un posicionamiento de marca porque en un logo, además de la identidad visual, se anticipan metonímicamente los relatos y los valores que sustenten la marca, bien sea una marca …
Chemical Ecology of Egg Parasitoids Associated with True Bugs
2012
Parasitoids representing some 15 families of Hymenoptera develop in insect eggs; three of these families, Platygastridae (= Scelionidae), Mymaridae, and Encyrtidae, are associated with Heteroptera. Several species of heteropteran egg parasitoids are or may be important for biological pest control. Successful parasitism of insect herbivores by insect parasitoids arises through several phases of host searching, which lead female wasps to the vicinity of, or in contact with, their hosts. During the host location process, females encounter and explore a variety of stimuli, among which chemical cues (i.e., semiochemicals or infochemicals) play a pivotal role. Female parasitoids are under selecti…
New cropping systems in semi-arid Mediterranean environments: potential role of medicinal and aromatic plants
2005
The semi-arid Mediterranean environments represent somehow “fragile” ecosystems, whose correct management needs some special attention. It is crucial therefore to study and point out some innovative farming systems able to deal with an income for workers, but in the meantime environmentally friendly and requiring the minimum energetic and technical inputs. In such sense, the cultivation of some selected medicinal and aromatic plants (MAPs) could be an important strategy. In our work we made an attempt to to sketch a comprehensive evaluation of the input levels required by 23 selected herbaceous MAPs, taking into consideration the indicative average levels of the energetic (including manpowe…
Data from: Gene flow in the European coal tit, Periparus ater (Aves: Passeriformes): low among Mediterranean populations but high in a continental co…
2018
Extant phylogeographic patterns of Palearctic terrestrial vertebrates are generally believed to have originated from glacial range fragmentation. Post-Pleistocene range expansions have led to the formation of secondary contact zones among genetically distinct taxa. For coal tits (Periparus ater), such a contact zone has been localized in Germany. In this study, we quantified gene flow between Fennoscandian and southern European coal tits using a set of 13 microsatellite loci. STRUCTURE analysis revealed four genetic clusters two of these on Mediterranean islands. German populations were genetically admixed but introgression of southern alleles was evident for Fennoscandian populations. In t…
Anti-Inflammatory Activity of Flavonol Glycosides fromErythrospermum monticolumDepending on Single or Repeated Local TPA Administration
1995
Two anti-inflammatory principles were isolated from the methanol extract of the leaves of Erythrospermum monticolum (Flacourtiaceae). The isolation was based on a guided bioassay of the inhibitory activity on TPA-induced ear edema in mice. These compounds were identified as quercetin 3-O-xylosyl(1-->2) rhamnoside and quercetin 3-O-rhamnoside. In addition, their effects on a chronic topic inflammation model were evaluated.
The role of the Thomsen-Friedenreich antigen as a tumor-associated molecule.
1990
The Thomsen-Friedenreich antigen (Gal-GalNAc) represents a tumor-associated molecule, which is assumed to be one of the few chemically well-defined antigens with a proven association with malignancy. In order to analyze the role of the carbohydrate structure Gal-GalNAc for gastrointestinal tumors, we immunized Balb/c mice with MCF-7 breast tumor cells together with synthetic Gal-GalNAc linked to a BSA carrier. One monoclonal antibody (82-A6) was established which recognizes the Thomsen-Friedenreich antigen according to the biochemical and serological analysis presented here. In contrast to the studies performed in the past, immunohistochemical results using this antibody 82-A6 did not exhib…