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21.
Hydrogeological characterization of karst springs of the white (Proteus anguinus anguinus) and black olm (Proteus anguinus parkelj) habitat in Bela krajina (SE Slovenia)
Katja Koren, Rok Brajkovič, 2023, original scientific article

Abstract: The springs west of Črnomelj, in SE Slovenia, are the habitat of the black (Proteus anguinus parkelj) and the white olm (Proteus anguinus anguinus). Some of these springs are also the only known habitat in the world of endemic species of black olm. A steady decline in olm populations has been observed in this area over the past decades. Owing to the rapid runoff and groundwater flow high-resolution monitoring is essential in providing better insight into the hydrogeological characterization of the catchment area of springs. Specific factors and critical parameters of water behind said olm degradation have not yet been defined. Because the olm’s environment is largely aquatic, one potential critical parameter could be the higher water temperatures (>12 °C) or higher nitrate concentration (>9.2mg/l). The six-month observation of the springs (July – December 2021) point to water temperature as a potential critical parameter since the water temperature of the springs exceeded 12 °C in months July and August. Nitrate concentrations could also be a second critical parameter in the degradation of the olm’s habitat. Maximum nitrate concentrations above 9.2mg/l throughout much of the observation period (except for Dobličica spring). Due to less agricultural activity in December in the spring catchment area and a higher dilution rate due to reduced evapotranspiration and increased effective precipitation during this time of the year, the nitrate concentrations are decreased. The results of the measured parameters of groundwater could show the hydrogeological connection between the Otovski and Pački breg springs and between Šotor, Jamnice and Dobličica. The Obršec spring has an independent catchment area. A detailed estimation of the springs catchment area is possible due to a detailed geologic map. It is necessary to determine the origin of the nitrate (nitrate isotope analysis), to quantify the threshold values of the critical parameters, to define precisely all the causes of the olm deterioration, and to make proposals for appropriate measures to limit or even stop the decline of the olm population.
Keywords: hydrogeology, olm, ecology, nitrate, monitoring
Published in DiRROS: 16.01.2024; Views: 152; Downloads: 55
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22.
Povezanost med rakom in onesnaževali, ki nastanejo v procesih sežiga in sosežiga odpadkov: krovni pregled literature
Teja Oblak, Tanja Carli, Vesna Zadnik, Niko Samec, Andreja Kukec, 2023, review article

Abstract: Izhodišča: V procesih sežiga in sosežiga odpadkov ter proizvodnje cementa se v okolje sproščajo izpusti, ki vsebujejo različna onesnaževala. Z namenom oceniti povezanost med rakom pri poklicno izpostavljenih in okoliških prebivalcih ter izpostavljenostjo okoljskim onesnaževalom iz sežigalnic, naprav za sosežig in cementarn smo si za cilj zadali izdelavo krovnega pregleda literature. Metode: V krovni pregled literature so bile vključene metaanalize in sistematični pregledi literature v angleščini v obdobju od leta 1980 do leta 2023. Iskanje je bilo izvedeno v štirih podatkovnih zbirkah (PubMed, Scopus, Web of Science, Cochrane Reviews). Kakovost je bila ocenjena z orodjema AMSTAR-2 (metodologija) in GRADE (dokazi). Rezultati: Izmed 7.701 opredeljenih dokumentov jih je bilo v končno analizo vključenih 14 (pet metaanaliz, devet sistematičnih pregledov). Obstajajo nizki do zmerni dokazi o povezanosti med sarkomom mehkih tkiv in ne-Hodgkinovim limfomom z izpostavljenostjo dioksinom v okolici sežigalnic I. generacije, česar študije niso dokazale za sežigalnice naslednjih generacij. Zaenkrat ne razpolagamo z dokazi za sosežig. Pri delavcih v cementarnah I. do II. generacije obstaja nekaj zmernih dokazov o povezanosti med incidenco vseh rakov, pljučnega raka, raka ustne votline in žrela, prostate in želodca z izpostavljenostjo šestvalentnemu kromu. Velika večina dokazov je omejenih zaradi mešanih rezultatov, razlik v tehniki vprašanj, heterogenosti in potencialni pristranosti. Zaključek: Obstajajo omejeni dokazi o povezanosti med rakom in izpostavljenostjo onesnaževalom iz sežigalnic I. in cementarn I. do II. generacije. Za oceno morebitne povezanosti med rakom in onesnaževali iz najsodobnejših naprav za sosežig je smiselno načrtovati ciljane epidemiološke študije in študije notranje izpostavljenosti z uporabo humanega biomonitoringa.
Keywords: rak, odpadki, sežig, sosežig, cementarna, onesnaževala
Published in DiRROS: 08.01.2024; Views: 191; Downloads: 74
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23.
Epidemiologija raka dojk
Vesna Zadnik, Sonja Tomšič, 2023, published professional conference contribution

Keywords: rak dojk, epidemiologija, register raka
Published in DiRROS: 05.01.2024; Views: 161; Downloads: 40
.pdf Full text (154,94 KB)

24.
Epidemiologija malignega melanoma
Maja Primic-Žakelj, Tina Žagar, Vesna Zadnik, 2007, published scientific conference contribution

Published in DiRROS: 06.12.2023; Views: 159; Downloads: 48
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25.
Presejanje za raka materničnega vratu v Sloveniji in državni program ZORA
Maja Primic-Žakelj, Vesna Zadnik, Ana Pogačnik, Marjetka Uršič-Vrščaj, 2006, professional article

Published in DiRROS: 05.12.2023; Views: 130; Downloads: 46
.pdf Full text (345,20 KB)

26.
Epidemiologija raka dojk v svetu in v Sloveniji
Maja Primic-Žakelj, Vesna Zadnik, 2004, published scientific conference contribution

Abstract: Izhodišča. Rak dojk je v Sloveniji napogostejši rak pri ženskah. Leta 2001 je za njim zbolelo 964 žensk (94,7/100.000), pričakujemo pa, da se bo v prihodnjih desetih letih incidenca še večala. Delež rakov, odkritih v omejenemstadiju, se počasi povečuje; leta 2001 je bilo takih manj kot 50% vsehprimerov. Čeprav se je preživetje bolnic izboljšalo (72% petletno relativno preživetje bolnic z rakom, odkritim v letih 1993-97), ostaja rak dojk pri ženskah na prvem mestu med vzroki smrti zaradi raka. Med dokazane nevarnostne dejavnike sodijo poleg spola in starosti še poprejšnji rak dojk, nekatere benigne bolezni dojk, družinska obremenitev, ionizirajoče sevanje, nekateri reproduktivni dejavniki in debelost. Za številne druge pa še ni dokončnega soglasja glede vprašanja, ali so povezave, ki so jih našli v nekaterih epidemioloških raziskavah, res vzročne. V primarni preventivi zaenkrat ni posebnih priporočil, so le splošna: vzdrževanje normalne telesne teže, pravilna prehrana, telesna dejavnost in zmernost pri pitju alkoholnih pijač. Ocenjujejo, da presejanje, redno marnografsko pregledovanje žensk po 50. letu starosti, zmanjša umrljivost za rakom dojk med pregledanimi za okrog 30%. Zaključki. Problem raka dojk je mogoče reševati celostno, s primarno preventivo, zgodnjim odkrivanjem in dostopnostjo do učinkovitega zdravljenja, predvsem pa z vlaganjem sredstev tja, kjer je razmerje med stroški in koristjonajugodnejše.
Published in DiRROS: 01.12.2023; Views: 144; Downloads: 46
.pdf Full text (361,42 KB)

27.
Toksikološka analiza vsebine vojaških čutar, zakopanih 70 let v kraški jami na Kočevskem, JV Slovenija
Janez Mulec, Sara Skok, Vesna Zalar Serjun, Andrej Mihevc, 2019, original scientific article

Abstract: Za odkrivanje ostankov materialnih sledi se na dobro ohranjenih predmetih lahko opravijo forenzične preiskave. V Breznu v Debliških livadah je bilo odkritih večje število predmetov, ki so bili odvrženi v jamo v maju in juniju 1945. Med odkritim materialom so bile tudi vojaške čutare. Nekatere izmed čutar so še vsebovale tekočino, nekatere pa tudi poltrdo, gelasto oborino. Tekočina in oborina iz čutar sta vsebovali kovine, ki so se najverjetneje s časom izlužile iz kovinske posode. Korozija čutar nakazuje prisotnost minerala hematita. Vsebina čutar je nadalje vsebovala nekaj raztopljene organske snovi (celotni organski ogljik – TOC v tekočini 9,22 mg/l, v tekočini ekstrahirane oborine 34,1 mg/l), nekaj mikrobne biomase ter relativno visoke koncentracije nitrata (240 mg/l v tekočini, 55 mg/l v ekstrahirani oborini) in sulfata (18mg/l v tekočini, 836 mg/l v ekstrahirani oborini). Bakterijskih indikatorjev, Escherichia coli in enterokokov, ki bi kazali na fekalno kontaminacijo vsebine, v vzorcih nismo zaznali. Raztopina in oborina sta izkazovali podobno stopnjo toksičnosti, okrog 20%inhibicijo bioluminiscence bakterije Vibrio fischeri. Glede na Pravilnik o pitni vodi tekočina s sedanjimi kemijskimi lastnostmi ni primerna za uživanje. Rezultati ne kažejo nujno na toksičnost izvornih tekočin iz časa, ko so bile čutare odvržene v jamo, ampak bi se toksičnost lahko razvila postopoma zaradi izluževanja kovin iz posode, zlasti aluminija, in (bio)kemijskih reakcij. Navkljub stabilnim jamskim razmeram, ki so jim bile izpostavljene čutare, ugotovljeni parametri ne podpirajo dolgoročne ohranitve stabilne DNA za morebitne nadaljnje forenzične analize.
Keywords: jame, vojaški material, toksičnost
Published in DiRROS: 23.11.2023; Views: 186; Downloads: 119
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28.
Spatial arrangement of functional domains in OxyS stress response sRNA
Vesna Štih, Heinz Amenitsch, Janez Plavec, Peter Podbevšek, 2023, original scientific article

Published in DiRROS: 29.09.2023; Views: 329; Downloads: 59
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29.
Characterisation of 20th century cementitious materials from selected cultural heritage structures in Slovenia
Mateja Golež, Vesna Zalar Serjun, Mateja Štefančič, Darja Rant, Sabina Dolenec, 2023, original scientific article

Abstract: This paper deals with the characterisation of cementitious materials from selected cultural heritage structures in Slovenia. The mineralogical–petrographic compositions of an aggregate, a type of binder and secondary minerals were studied via electron microscopy and X-ray powder diffraction. The porosity and pore network were determined using a mercury porosimeter. The results show that the aggregate of the samples was highly diverse, ranging from limestone, dolomite, quartz, feldspar and mica. The binder of the investigated samples was cementitious; either ordinary Portland cement was used, or ordinary Portland cement blended with ground granulated blast furnace slag was used. Some samples consisted of cement–lime binders. The investigated examples entailing cement materials for their construction contribute to a better understanding of the technology used to prepare historical cementitious and cement–lime mixtures.
Keywords: 20th century, cementitious materials, historical concrete, cultural heritage
Published in DiRROS: 15.09.2023; Views: 257; Downloads: 165
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30.
Remediation of contaminated soil by red mud and paper ash
Primož Oprčkal, Ana Mladenovič, Nina Zupančič, Janez Ščančar, Radmila Milačič, Vesna Zalar Serjun, 2020, original scientific article

Abstract: Remediation of contaminated soil can be performed by using various techniques, which must be adequately tailored for each specific case. The aim of this research is to critically evaluate the potential use of red mud and paper ash and a combination of the two as immobilization additives for the remediation of contaminated soil from one of the most polluted sites in Slovenia. The proposed procedure involves the preparation of geotechnical composites made from contaminated soil and mixed with 25 wt% of immobilization additives and an optimal quantity of water to achieve consistency, at which maximum compaction according to the Proctor Compaction Test procedure can be achieved. The results reveal a positive, time-dependent trend for the immobilization of potentially toxic elements in the composite with paper ash, because of the formation of the new hydration products with potentially toxic elements. In a composite containing only red mud, potentially toxic elements were immobilized by sorption mechanisms with no general time-dependent trends. The composite with a combination of additives demonstrates the remediation characteristics of both red mud and paper ash. Using this approach excavated contaminated soil, red mud and paper ash can be successfully recycled in the proposed composites, which can be beneficially used in situ for rehabilitation of contaminated sites. Nevertheless, mobilization of some potentially toxic elements at high pHs may represent a limiting factor and has to be taken into the consideration when a combination of red mud and paper ash is used as immobilization additive.
Keywords: red mud, paper ash, contaminated soil, potentially toxic elements, geotechnical composites
Published in DiRROS: 31.08.2023; Views: 286; Downloads: 223
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