Paginacija
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The role of brassinosteroids and salicylic acid in plant defense response to Potato spindle tuber viroid infection
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Jasna Milanović Viroids are plant–pathogenic molecules characterized by a single–stranded circular non–coding RNA
genome. Despite their genomic simplicity, these plant pathogens are able to induce disease in a wide
range of host plants with significant economic impact. The surveillance activities described in this
study, revealed the presence of Potato spindle tuber viroid (PSTVd) in Croatia in two ornamental
species, while no PSTVd infection was found in tomato or potato. This study was also...
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The role of bridging fibers in the architecture of the metaphase mitotic spindle
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Bruno Polak Mitosis is a fundamental process during which the genetic material is transferred to
daughter cells and is orchestrated by the mitotic spindle. Between two opposite spindle poles
microtubules form bundles that interact with chromosomes. Bundles that bind to kinetochores on
the chromosome are called kinetochore fibers, whilst certain microtubules form antiparallel
overlap bundles in the central part of the spindle. With this research localization and distribution
of antiparallel overlap...
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The role of bridging microtubules in anaphase of cell division
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Renata Buđa During cell division, microtubules of the mitotic spindle segregate chromosomes by exerting
forces on kinetochores, protein complexes on the chromosomes. The central question is which
forces drive chromosome segregation. The current model for anaphase in human cells
includes shortening of kinetochore fibers and separation of spindle poles, processes that
require kinetochore-pole connections. By combining laser ablation, photoactivation and
protein depletion, we show that kinetochores...
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The role of kinesin-8 and PRC1 proteins in kinetochorepositioning in the metaphase plate
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Mihaela Jagrić U metafazi mitoze kromosomi se poravnavaju u ekvatorijalnoj ravnini diobenog vretena što je
od ključne važnosti za pravilan završetak kasnijih faza. Poravnavanje kromosoma regulirano
je silama dinamike kinetohornih vlakana (k-vlakana) te silama odbijanja na polovima. U
ovome radu istražena je uloga kinezina-8 u poravnavanju kromosoma, koji je jedan od
glavnih regulatora dinamike k-vlakana. Pokazala sam kako kinezin-8 regulira brzinu i
amplitudu kretanja kinetohora, dok eksperimenti...
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The role of microtubule-associated
proteins in the generation and
regulation of spindle shape
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Monika Trupinić In the mitotic spindle, a complex micro-structure responsible for the segregation of chromosomes,
individual microtubule bundles obtain different shapes depending on the mechanical forces acting
on them. In addition to linear forces, rotational forces are present in the spindle, reflected in the
left-handed twisted shapes of microtubule bundles that make the spindle chiral. However, it is not
known how twist changes throughout mitosis in non-tumor cells, or what are the molecular...
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The role of solid-state reactivity in the prebiotic selection of nucleobases and formation of peptides
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Tomislav Stolar Within this thesis, solid-state reaction medium and mechanochemical methodologies were explored to unveil weather nucleobases can self-assemble and amino acids can oligomerize under these conditions. X-ray diffraction and differential scanning calorimetry analysis showed that 2,6-diaminopurine (D) selectively self-assembles with uracil (U) and thymine (T), while adenine (A) self-assembles with hypoxanthine (H). Crystal structures of D-U cocrystal hydrate, D-T cocrystal hydrate, D-T cocrystal...
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Thermodynamics and geometry of black holes in the presence of nonlinear electromagnetic fields
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Ana Bokulić Nonlinear electrodynamics (NLE) is an umbrella term for nonlinear modifications of Maxwell’s theory. The first NLE theories appeared as quantum corrections to Maxwell’s electrodynamics or in order to cure point charge singularities. Our focus is on NLE fields in the context of gravitational theory, their impact on the laws of black hole thermodynamics and the general geometric properties of spacetimes. Using a perturbative approach, we show that the solution for the Schwarzschild black...
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Theta liftovi ireducibilnih reprezentacija metaplektičke grupe
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Petar Bakić U ovoj disertaciji proučavaju se theta liftovi generičkih reprezentacija simplektičke, odnosno metaplektičke grupe definirane nad lokalnim nearhimedskim poljem F karakteristike 0. U radu odgovaramo na osnovna pitanja vezana uz theta korespondenciju: kada su promatrani liftovi različiti od nul-reprezentacije, te kako izgledaju ne-nul liftovi. Za potpuni odgovor na prvo pitanje koristimo Kudlinu filtraciju i rezultat G. Muića o ireducibilnosti standardnih modula generičkih...
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Three-dimensional elastic body and a Naghdi type shell interaction modelling
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Matko Ljulj In this thesis we analyse an interaction problem between two elastic three-dimensional bodies of which one is much thinner than the other. Furthermore, the thin body is assumed to be more stiff with elastic coefficients related to the small thickness parameter. We consider this problem in context of both linear and nonlinear elasticity. We analyse asymptotic behaviour of solutions of these problems and obtain different limit models in various regimes as thickness tends to zero. Furthermore,...
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Time-changed stochastic models: fractional Pearson diffusions and delayed continuous-time autoregressive processes
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Ivan Papić In this thesis we study time-changed stochastic models via inverse of the standard stable subordinator. Moreover, we study two types of such models: fractional Pearson diffusions and delayed continuous-time autoregressive processes. In Chapter 2 we review the connection between fractional calculus and stochastic processes, i.e. connection between fractional differential equations and time-changed stochastic processes. Chapter 3 gives a review on modern theory of diffusion processes with...
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Time-like graphical models
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Tvrtko Tadić We study continuous processes indexed by a special family of graphs. Processes indexed by vertices of graphs are known as probabilistic graphical models. In 2011, Burdzy and Pal proposed a continuous version of graphical models indexed by graphs with an embedded time structure -- so called time-like graphs. We extend the notion of time-like graphs and find properties of processes indexed by them. In particular, we solve the conjecture of uniqueness of the distribution for the process indexed...
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Toksičnost i oksidativni učinci pripravka ginka i antihemostatskih lijekova u štakora
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Marija Skoko Cilj ovog istraživanja je prikazati učinke i razlike u toksičnosti te prooksidativne i antihemostatske mehanizme triju biljnih formulacija namijenjenih ljudskoj uporabi kao dodaci prehrani, a koja sadrže pripravak biljke Ginkgo biloba, dostupne na području Republike Hrvatske. Istražen je i njihov učinak u kombinaciji s antihemostatskim lijekovima, acetilsalicilnom kiselinom i varfarinom. Istraživanje je provedeno na životinjskom modelu štakora. Testovima agregacije i koagulacije...
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