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29 Research products, page 1 of 3

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  • Closed Access English
    Authors: 
    Jelena, Topić; Anita, Klančar; Jurij, Trontelj; Robert, Roškar;
    Country: Slovenia

    Pharmaceuticals are considered as emerging pollutants of particular concern due to their continuous release into the environment and the potential impact on aquatic organisms. The selection of the target compounds for evaluation in fish tissue was based on physico-chemical properties, bioaccumulation potential and the results of the screening of pharmaceuticals in the effluent of WWTP Sevnica in March 2015. We chose tramadol, risperidone, desipramine, carbamazepine, irbesartan, naproxen, valsartan, atorvastatin, triclosan, simvastatin and diclofenac. The method was developed on muscle tissue and is based on the tissue homogenization with stainless steel beads, followed by extraction with acetonitrile, centrifugation and sample clean-up with solid-phase extraction (SPE). The instrumental analysis was performed with LC-MS/MS. The best and the most reproducible recoveries were observed for the samples that were diluted to 25 mL with 50 mM phosphate buffer pH 7. The method was validated and the linearity range was established, which was in the range of 0.1 – 1000 ng/g, depending of the compound. The recoveries for the target pharmaceuticals were in the range of 24.0 – 108.5 %, with good reproducibility as the relative RSD values for all compounds were below 7.5 %. LOQ values for the compounds were in the 0.1 – 50 ng/g range. We applied the method to the fish tissue samples from the river Sava and from the aquaculture establishment. We chose muscle, liver, skin and kidney tissue samples. The results showed presence of tramadol and carbamazepine in some tissue, but the concentrations were below the LOQ.

  • Open Access English
    Authors: 
    Lipej, Lovrenc; Mavrič, Borut; Simič, Jan; Trkov, Domen;
    Publisher: Zgodovinsko društvo za južno Primorsko, Znanstveno raziskovalno središče Republike Slovenije, Societá storica del Litorale, Centro di ricerche scientifiche della Repubblica di Slovenia, Science and Research Centre of the Republic of Slovenia
    Country: Slovenia

    The paper deals with four opisthobranch molluscs, which were found in the Slovenian marine waters as new records. The pleurobranchomorph Pleurobranchea meckeli was found on two occasions on muddy detritic bottom in the Gulf of Piran in June of 2013 and 2014. The nudibranch Favorinus branchialis was found in May and June 2014 on turf vegetation in a very shallow area off the pier in Koper harbour. Its spawn with white eggs was also found nearby. The second nudibranch Facelina rubrovittata was found in March 2010 crawling in the intertidal zone of the Nature reserve Strunjan. The third nudibranch Dondice banyulensis was found in waters of the Nature Monument Debeli rtic on sedimentary bottom. With the fi nding of these four species, the total number of opisthobranchs recorded to date in the Slovenian part of the Adriatic Sea increased to 75 species. Prispevek obravnava podatke o štirih vrstah polžev zaškrgarjev (Opisthobranchia), ki so bili najdeni v slovenskem delu Jadranskega morja. V letih 2013 in 2014 smo našli nekaj primerkov vrste Pleurobranchea meckelii. Gološkrgarja vrste Favorinus branchialis smo našli na nizki blazinasti vegetaciji v plitvem morju ob koprskemu pomolu v maju in juniju 2014. V bližini je bil tudi njegov mrest. O tej vrsti so znani zapisi iz okolice Rovinja in Ravene. Drugega gološkrgarja vrste Facelina rubrovittata smo našli v Mesecevemu zalivu v naravnem rezervatu Strunjan marca 2010. Ta vrsta je bila doslej znana predvsem iz zahodnega dela Sredozemskega morja, v Jadranskem morju pa je znan le zapis z zahodne obale južnega Jadrana iz leta 2006. Tretjega gološkrgarja Dondice banyulensis smo odkrili na dnu naravnega spomenika Debeli rtic, kjer se je plazil po perjanici cevkastega mnogošcetinca Spirographis spallanzani. Z novimi najdbami se je število v slovenskem morju ugotovljenih vrst polžev zaškrgarjev povecalo na 75. Te najdbe potrjujejo hipotezo, da je vrstna pestrost slovenskega dela Jadranskega morja izjemno velika, hkrati pa se bo seznam novoodkritih polžev zaškrgarjev v prihodnosti nedvomno še dopolnjeval z novimi zapisi.

  • Open Access English
    Authors: 
    Malačič, Vlado;
    Publisher: Elsevier
    Country: Slovenia

    The rise of an effluent emerging from the diffusers of the submarine sewage outfall of a small town (15000 PE) is numerically simulated with a model of initial dilution.

  • Open Access English
    Authors: 
    Graham, W.M.; Costello, John H.; Colin, Sean P.; Malej, Alenka; Lučić, Davor; Onofri, Vlado; Benović, Adam;
    Publisher: Centro di ricerche scientifiche della Repubblica di Slovenia
    Country: Slovenia
  • Open Access English
    Authors: 
    Dorman, C.E.; Malačič, Vlado;
    Publisher: William Byrd Press for John Hopkins Press
    Country: Slovenia

    A vinter oceanographic field experiment provided an opportunity to examine theatmospheric marine conditions over the northern Adriatic. Mean February winds are from a northeasterly direction over most of the Adriatic and a more northerly direction along the western coast...

  • Open Access English
    Authors: 
    Mihanović, Hrvoje; Vilibić, Ivica; Carniel, S.; Tudor, M.; Russo, A.; Bergamasco, A.; Bubić, N.; Ljubešić, Z.; Viličić, Damir; Boldrin, A.; +4 more
    Publisher: EGU
    Country: Slovenia
  • Open Access English
    Authors: 
    Malej, Alenka; Turk, Valentina; Kogovšek, Tjaša; Makovec, Tihomir; Onofri, Vlado; Chiaverano, Luciano; Tinta, Tinkara; Flander-Putrle, Vesna; Lučić, Davor;
    Publisher: Centro di ricerche scientifiche della Repubblica di Slovenia
    Country: Slovenia
  • Open Access English
    Authors: 
    Benović, Adam; Acha, E. Marcelo; Malej, Alenka; Alvarez Colombo, Gustavo; Baće, Željko; Mianzan, Hermes;
    Publisher: Centro di ricerche scientifiche della Repubblica di Slovenia
    Country: Slovenia
  • Open Access English
    Authors: 
    Dolenšek, Jurij; Valentinčič, Tine;
    Publisher: Springer
    Country: Slovenia

    In vivo investigations of catfish olfactory receptor neurons (ORNs) were previously limited to studying responses of spontaneously active cells. The olfactory organ, however, also contains ORNs that lack spontaneous activity and respond to amino acids. To record electrical activity of ORNs that were inactive prior to stimulation, we bathed the olfactory organ with low conductive, highly purified water that reduces shunting and enables detection of action potentials from ORNs distant to the electrode. After stimulation with amino acids, these ORNs elicited either phasic-tonic or tonic only activities. The spike frequency of the phasic activity consisted of transient frequencies up to 108 Hz that lasted 2 amino acids that included l-norvaline. In 29 of 31 neurons responding to >1 amino acid, the duration of the responses to the most stimulatory amino acid was at least double compared to that to the other amino acids. The amplitude of electro-olfactogram (EOG) correlated significantly with the number of ORNs activated by the same amino acids confirming that the EOG represents the sum of ORN receptor potentials.

  • Open Access English
    Authors: 
    Malej, Alenka; Turk, Valentina; Lučić, Davor; Benović, Adam;
    Publisher: Springer-Verlag
    Country: Slovenia

    The pattern of diel vertical migration and the trophic interactions of moon jelly (Aurelia sp.) were investigated in the sea lake of Mljet Island (Adriatic Sea) where this scyphomedusa is present throught the year...