Mijo Kišpatić, Osijek, 22. 9. 1851 – Zagreb, 7. 5. 1926

Mijo Kišpatić bio je među najznačajnijim profesorima zaposlenima na Sveučilištu u Zagrebu na kraju XIX. i početku XX. stoljeća. Bio je prvi prirodoslovac koji je postigao stupanj doktora znanosti na obnovljenome Sveučilištu u Zagrebu. Bio je izvrstan znanstvenik koji je pokrivao područja mineralogije, geologije, fizike i biologije. Morali bismo biti ponosni na njega, jer je bio ispred svojega vremena, ponekad i po više od četrdeset godina. Neke su njegove ideje prepoznali znanstvenici u svijetu nakon više od 25 godina od njegove smrti.Mijo Kišpatić was among the most prominent professors employed at the University of Zagreb at the end of XIX and beginning of XX century. He was the first scientist who received his doctoral degree at renewed University of Zagreb. He was excellent scientist covering very wide knowledge from mineralogy, geology, physics, and biology. We have to be proud of him, because he was looking in front of his time, sometimes more than 40 years. Some of his ideas were recognized among the scientists in the World more than 25 years after his death

Tertiary volcanic activity in the Inner Dinarides (Republic of Macedonia)

During the Teritary, from the Eocene to the Plioccene granodiorite masses inturdes axtruded on the surface along some tectonic zones. The evolution of this magmatism was reported first by Ilic (1962), and later presended in detail by Karamata (1962), Karamata and Dzordzevic (1980), Antonovic and Filipovic (1977) reported the major geochemical features of this magmatism. Individual area were shown in detail by Boev(1988)

Polymerization of 1,4-dinitrosobenzene: Kinetics and Submicrocrystal Structure

In this study, the structure of the polycrystalline poly(l,4-phenyleneazine N,N-dioxide) was investigated by Scanning Electron Microscopy and related with the previously calculated molecular structure. Kinetics of polymerization of 1,4-dinitrosobenzene, prepared by both cryogenic UV photolysis and in vacuo deposition were measured by time-resolved FT-IR spectroscopy. Acquired data was analyzed by curve fitting with the standard Avrami-Erofeev and two-step consecutive reactions models. Activation parameters were calculated from Arrhenius and Eyring-Polanyi equations, for both models. The results obtained by using the two models, along with the goodness of-fit parameters, were compared. It was shown that both bulk-based and reaction-based models can be used to adequately describe solid-state chemical reaction kinetics. Furthermore, a two-step consecutive reactions model is a suitable alternative to the most commonly used Avrami-Erofeev model. This work is licensed under a Creative Commons Attribution 4.0 International License

Kataliza u prvotnom svijetu

Catalysis provides orderly prebiotic synthesis and eventually its evolution into autocatalytic (self-reproduction) systems. Research on homogeneous catalysis is concerned mostly with random peptide synthesis and the chances to produce catalytic peptide oligomers. Synthesis of ribose via formose reaction was found to be catalysed by B(OH)4–, presumably released by weathering of borate minerals. Oxide and clay mineral surfaces provide catalytic sites for the synthesis of oligopeptides and oligonucleotides. Chemoautotrophic or iron-sulphur-world theory assumes that the first (pioneer) organisms developed by catalytic processes on (Fe/Ni)S particles formed near/close hydrothermal vents. The review provides an overlay of possible catalytic reactions in prebiotic environment, discussing their selectivity (regioselectivity, stereoselectivity) as well as geological availability of catalytic minerals and geochemical conditions enabling catalytic reactions on early Earth. This work is licensed under a Creative Commons Attribution 4.0 International License.Kataliza omogućuje uređenu sintezu te njezinu evoluciju do autokatalitičkih (samoreproduktivnih) sustava. Istraživanje homogene katalize bavi se većinom nasumičnom sintezom peptida i vjerojatnostima nastajanja katalitičkih peptidnih oligomera. Sinteza riboze reakcijom formoze katalizirana je ionom B(OH)4–, koji se može osloboditi trošenjem boratnih minerala. Površine oksidnih minerala i minerala gline daju katalitička mjesta za sintezu oligopeptida i oligonukleotida. Kemoautotrofna teorija ili teorija željezno-sumpornog svijeta pretpostavlja da su se prvi (pionirski) organizmi razvili katalitičkim procesima na česticama (Fe/Ni)S nastalim blizu hidrotermalnih vrela. Rad daje pregled mogućih katalitičkih reakcija na Zemlji prije nastanka života te razmatra selektivnost (regioselektivnost, stereoselektivnost) i geološku raspoloživost katalitičkih minerala uz osvrt na geološke uvjete koji su omogućili katalitičke reakcije na mladoj Zemlji. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna

Mineralogy of pegmatite with giant epidote crystals, near Chanishte, Macedonia

Giant epidote crystals up to 2m long have a formula and unit cell parameters.Epidote is in association with albite, microc1ine (amazonite variety), muscovite, garnet, titanite and zircon. Crystallization temperature is estimated to be about 400°C on the basis of two feldspars thermometer