BIOREpository (Faculty of Biology, University of Belgrade)
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Varijabilnosti kondicionog indeksa zidnog guštera (Podarcis muralis Laurent, 1768) u urbanoj populaciji (Beograd, Srbija)
No full textKondicioni indeks tela predstavlja odnos između mase i dužine tela jedinke, a koristi se za procenu zdravstvenog stanja jedinki, predviđanje reproduktivnog uspeha i stope preživljavanja jedinki. Na varijabilnost kondicionog ideksa utiču brojni faktori: sezona, pol, kvalitet staništa, antropogeni uticaj, stopa predacije i dr. U antropogenim sredima većina vrsta suočena je sa brojnim pritiscima i veoma mali broj može da opstane i da se adaptira na takve uslove. Zidni gušter (Podarcis muralis) je vrsta koja se često sreće u urbanim sredinama, i veoma je pogodna kao model sistem iz grupe gmizavaca za istraživanje u atropogenim sredinama. Osnovni cilj ovog rada bio je ispitivanje varijabilnosti kondicionog indeksa pre i nakon brumacije, uzimajući u obzir faktore pol i rep (ceo ili regenerisan). Analizirano je ukupno 97 adultnih jedinki (52 jedinke pre brumacije i 45 jedinki nakon brumacije) iz Beograda. Rezultati ANOVE su pokazali da se kondicioni indeksi značajno razlikuju između polova (F=47.27, p<0.001), pa su razlike po sezonama testirane za svaki pol posebno. Kondicioni indeks je bio manji posle brumacije i kod mužjaka (F=8.29, p=0.006) i kod ženki (F=4.26, p=0.045), zbog toga što se gušteri ne hrane tokom brumacije, već koriste prethodno uskladištene energetske rezerve. U urbanim sredinama temperatura sredine u zimskim mesecima je uglavnom viša, što tokom brumacije može uticati na povećanu aktivnost guštera i veću potrošnju energije iz nakupljenih rezervi. Vrednosti kondicionih indeksa kod jedinki sa celim i regenerisanim repom bile su slične (F=3.84, p=0.053).М64616
Mould Realization and Technology Development for Different Biocomposite Specimens (Mycelium-Based Materials): Case – Three-Point Bending Test
No full textThe idea of this paper is the application of biomaterials in construction, primarily as thermal insulation materials. It is necessary to prepare biocomposite specimens to test their mechanical characteristics and behavior. This work prepared the specimens for three-point testing bending following the corresponding standards ASTM D790 (three-point bending) and ASTM D7264 (flexural stiffness and strength properties). Firstly, a 3D polymer mold prototype was developed and manufactured. After that, the technology of the biological process of the production of mycelium-based composite materials was carried out according to the appropriate procedure, where three different types of substrates with two types of granulations (fine and coarse) were used. Specimens (or plates) with a reinforced structure (where the moisture percentage was reduced to a minimum) were obtained and prepared for the mechanical characteristics testing.M3
''Effects of rTMS on neurodegeneration, neuroinflammation, and purinergic signaling in a 6-OHDA Parkinson’s disease model''
No full textM3
Diagnostic potential of SMAD7 and SMAD4 expression and their ratio in locally advanced rectal cancer and colorectal liver metastasis
No full textBook of Abstracts, p115M3
Fungal diversity of bat skin from caves of Eastern Serbia: contribution to the understanding of subterranean biodiversity
No full textBook of abstracts pp. 171M3
Metabolic changes in Phycomyces blakesleeanus mycelia during selenite reduction and cellular localization of synthesized SeNPs
No full textThis study considers the capacity of fungus Phycomyces blakesleeanus for removal of toxic selenite from the environment and metabolic response of the mycelium during Se transformation. The X-ray Fluorescence Microscopy (XFM) suggests two pathways of selenite transformation: extensive internalisation and intracellular transformation leading to volatilization, and synthesis of SeNPs at the cell surface, with the contribution of each pathway depending on selenite concentration and treatment duration. Glutathione plays an important role in the reduction process, as the glutathione pool is alternately removed from and restored to redox balance during Se treatment. Enzymes facilitate the maintenance of the cellular redox balance, which is reflected in an increase in the specific activities of glutathione reductase, glutathione peroxidase, glutathione S-transferase and catalase at different time points during the 48-h exposure of mycelia to 100 µM selenite. During the transition from the exponential to the stationary growth phase, a metabolic shift was documented, which can be seen in the change of the total glutathione content and glutathione redox status. This points out that the developmental stage of the mycelia plays an important role in the capacity for selenite reduction and mycelia survival in a selenium-enriched medium. This work is a step towards the use of selenite-contaminated media for Se extraction and re-utilisation and suggests that Phycomyces blakesleeanus might be a suitable organism for the effective re-utilisation of Se.M213.125441
Common chiffchaff and mountain chiffchaff respond equally to conspecific and heterospecific songs
No full textM3
Uncovering Autochthonous Deteriogenic Biofilm and Developing Beneficial Bacteria-Based Bioformulations from Indigenous Isolates for Biocontrol and Biocleaning of the Rožanec Mithraeum Limestone Monument
No full textBook of Abstracts, p. 23M3
