TASK2 (K2P5. 1, KCNK5) is a two-pore domain K⁺ channel belonging to the TALK subgroup of the K2P family of proteins. TASK2 expression has been reported in a variety of cells and tissues ranging from kidney to immune cells and including specific neurons, its proposed functions spanning from involvement in the regulation of cell volume to control of excitability. The purpose of this study was to determine the tubule location ofthe TASK2 K⁺ channel protein in frog kidney applying polyclonal antibody against the carboxyl terminus of human TASK2 (KCNK5) protein. Immunohistochemical analysis revealed that TASK2 is expressed on distal tubules and proximal epithelial cells. TASK2 is strongly expressed predominantly on the luminal part ofthe proximal epithelial cells and slightly cytoplasmatic staining is expressed. Distal tubules showed diffuse cytoplasmatic staining as well as slight staining on the apical parts ofthe cells. These findings suggest that the TASK2 K⁺ channel has cell-specific roles in renal potassium ion transport.

In this paper, applying Parseval’s formula, we prove a Gθ – summability analogue of Avadhani’s theorem for the Riesz–summability of the eigenfunction expansion. A crucial step in our proof of this theorem was to find a function g(x) that would lead us to the kernel of the Gθ –summability, which is more complex than the kernel of the Riesz – summability.

Suvremenu društvenu (Foucault, Ginzburg, Hobsbawm, Chartier) i književnu (Eagleton, Belsey, Williams, Jameson) teoriju karakterizira radikalan kritički odmak od centralizirajuće pojmovne prakse (kontinuitet književnosti, klasni odnos) i njenog suviše transparentnog razumijevanja ideoloških, povijesnih i umjetničkih činjenica. Ovaj zaokret u teorijskom diskursu nije samo perspektivan, već i predmetan: s obzirom na to da se kontekst moći prestaje očitovati u službenom diskursu, predmet zanimanja postaju oni činovi i iskustva čije značenje nije moguće ugoditi prema obzoru očekivanja dominantne ideološke prakse – u povijesti i komplementarnim društvenim znanostima (sociologija, psihologija, etnologija) naglasak se stavlja na subjektivno iskustvo i otpornost sjećanja, u književnosti i književnim teorijama na dijalektiku teksta i konteksta. U ovom će se radu analizirati odnos ideologije i sjećanja u kontekstu suvremene književnosti i suvremene povijesne i književne teorije. Ključne riječi: sjećanje, ideologija, subjekt, društvena teorija, književna teorija, književnost

In this paper, microwave processing of nanostructured ZnO powder as well as preparation of nanostructured ZnO/PEO composite were described. As a fast processing method which introduces a large amount of energy in the reaction system, the role of microwave processing was to modify ZnO crystal structure, while the role of PEO was to additionally sensitivize surface of ZnO particles; both of the approaches were used in the aim to improve optical properties of zinc oxide in comparison with bulk one. The synthesized powders were characterized by X-ray powder diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL). It was found that point defects (oxygen vacancies and zinc interstitials) were created in the crystal structure of zinc oxide. However, PEO has two-fold role, it passivate surface of the ZnO particles, but also introduce oxygen interstitials on the surface. The influence of the point defects on optical properties of ZnO was studied; it was found that oxygen vacancies, zinc interstitials and oxygen interstitials improved percent of thevisible light absorption, also shift band gap energy toward visible range of the spectrum.