Dalija Milić Kralj, Branko Klarin,
Various types of hybrid drives are increasingly being applied in transportation. Wing sails can provide additional propulsion to a motor-driven ship, thereby decreasing fossil fuel consumption. This article contributes to the selection and consideration of the influencing parameters for applying wing sails for ship propulsion. Basic developmental factors and application of wing sails are described. In addition, influential parameters and their relations are discussed. These parameters are connected ...
Tópico(s): Aerodynamics and Fluid Dynamics Research
2016 - SDEWES Centre | Journal of Sustainable Development of Energy Water and Environment Systems
Martina Kralj, Marina Lipizer, Branko Čermelj, Massimo Celio, Cinzia Fabbro, Fabio Brunetti, Janja Francé, Patricija Mozetič, Michele Giani,
Physical and chemical data collected in three stations, with time series ranging from 1983, 1986 and 1989 to 2016, were analyzed in order to detect trends and frequency of occurrence of hypoxia events in bottom waters of the Gulf of Trieste (Adriatic Sea). The results of the analysis of 30-years data show a tendency toward increasing oxygen concentration in the bottom waters, nevertheless two hypoxic events were recorded during the summers of 2015 and 2016 even in a relatively shallow area of the ...
Tópico(s): Oceanographic and Atmospheric Processes
2019 - Elsevier BV | Deep Sea Research Part II Topical Studies in Oceanography
Andreas Könnecke, P. Lepom, Ronald Dörre, Eberhard Lippmann, Rainer Herzschüh, B. Kralj, Branko Stanovnik, M. TIŠLER,
Abstract Heterocycles containing an integrated 2‐nitrobenzaldehyde imine moiety produce ions of m/z 134 with high abundance under electron impact. As shown by kinetic energy release measurements these ions have the same structure in all the cases studied, identical to m/z 134 formed from the reference compound 2‐nitrobenzoylpiperidide. The mechanism of formation of m/z 134 most probably involves isomerization of its precursor ion to give a spiro intermediate, from which m/z 134 arises either synchronously ...
Tópico(s): Energetic Materials and Combustion
1980 - Wiley | Organic Mass Spectrometry
Branko Bauer, Slobodan Kralj, Matija Bušić,
Tópico(s): Cellular and Composite Structures
2013 - Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering i | Tehnicki vjesnik - Technical Gazette
David Kralj, Uroš Grošelj, Anton Meden, Georg Dahmann, Branko Stanovnik, Jurij Svete,
Abstract A simple four-step synthesis of 4-(2-aminoethyl)-5-hydroxy-1H-pyrazoles 8 (or their 1H-pyrazol-3(2H)-one tautomers 8′) as the pyrazole analogues of histamine was developed. First, enamino lactam 3 was prepared as the key intermediate in two steps from 2-pyrrolidinone (1). Next, acid-catalysed ‘ring switching’ transformations of 3 with monosubstituted hydrazines 4 gave N-[(1-substituted 5-hydroxy-1H-pyrazol-4-yl)ethyl]benzamides 7a–k and N-[2-(2-heteroaryl-3-oxo-2,3-dihydro-1H-pyrazol-4-yl) ...
Tópico(s): Synthesis and Reactions of Organic Compounds
2007 - Elsevier BV | Tetrahedron
Lucija Zupančič Kralj, Aleš Hvala, Jurij Svete, L. Golič, Branko Stanovnik,
Abstract Methyl (Z)‐2‐acetylamino‐3‐dimethylaminopropenoate (3) was prepared from N ‐acetylglycine (1), which was converted with N,N ‐dimethylformamide and phosphorus oxychloride into 4‐dimethylaminomethylene‐2‐methyl‐5(4 H )‐oxazolone (2), followed by treatment with methanol in the presence of potassium carbonate, into 3. The compound 3 was shown to be a versatile reagent in the synthesis of various heterocyclic systems. With N ‐nucleophiles, such as heterocyclic amines 4, either methyl 2‐acetylamino‐3‐ ...
Tópico(s): Synthesis and Reactions of Organic Compounds
1997 - Wiley | Journal of Heterocyclic Chemistry
M. Janjic, Rok Prebil, Uroš Grošelj, David Kralj, C. Malavasic, Amalija Golobič, Katarina Stare, Georg Dahmann, Branko Stanovnik, Jurij Svete,
Abstract A four‐step synthesis of 1‐substituted 5‐(2‐aminophenyl)‐1 H ‐pyrazoles 5 as a novel type of histamine analogs and versatile building blocks for further transformations was developed. The synthesis starts from commercially available 2‐nitroacetophenone ( 12 ), which is converted into the enamino ketone 13 as the key intermediate. Cyclization of the key intermediate 13 with monosubstituted hydrazines 14a – 14l afforded the 5‐(2‐nitrophenyl)‐1 H ‐pyrazoles 17a – 17l . Finally, catalytic hydrogenation ...
Tópico(s): Synthesis of heterocyclic compounds
2011 - Wiley | Helvetica Chimica Acta
Jurij Svete, David Kralj, Jasmin Mecinović, D. Bevk, Uroš Grošelj, Branko Stanovnik,
1,4-Disubstituted 5-hydroxy-1H-pyrazoles ( 9), ( 12), and (13) were prepared in two steps from hydrazines (2a-k) and 3-(dimethylamino)propenoates (1), (4), and (5).First, acid-catalyzed treatment of enaminones ( 1), (4), and ( 5) with (hetero)arylhydrazines (2a-k) afforded the corresponding dimethylamine substitution products, hydrazones (3') and enehydrazines ( 6) and ( 7).Under acidic conditions, intermediates (3'), (6), and (7) did not undergo cyclization into the pyrazole derivatives.However, heating 3', 6, and 7 in ...
Tópico(s): Multicomponent Synthesis of Heterocycles
2006 - Elsevier BV | Heterocycles
David Kralj, Miha Friedrich, Uroš Grošelj, Sonja Kiraly-Potpara, Anton Meden, Jernej Wagger, Georg Dahmann, Branko Stanovnik, Jurij Svete,
A seven-step synthesis of 1-substituted 5-(2-acylaminoethyl)-1H-pyrazole-4-carboxamides 20 as the pyrazole analogues of histamine was developed. The synthesis starts with a three-step preparation of N(1)-substituted methyl 5-(2-tert-butoxycarbonylaminoethyl)-1H-pyrazole-4-carboxylates 7 from commercially available Boc-β-alanine (1). Subsequent four-step transformation of the key-intermediates 7 into the final products 20 was performed following two complementary reaction sequences comprising acidolytic ...
Tópico(s): Synthesis and biological activity
2009 - Elsevier BV | Tetrahedron
Slobodan Kralj, Branko Bauer, Lidija Ćurković,
Tópico(s): Material Properties and Applications
2005 - Springer Science+Business Media | Welding in the World
Branko Bauer, Angela Topić, Slobodan Kralj, Zoran Kožuh,
Shielding gases, i.e., argon or an argon-nitrogen mixture, are normally used during the laser-beam welding of duplex stainless steel. Helium is also often added to the argon. The effect of the type of shielding gas – argon, nitrogen, helium and their mixtures – on the geometrical characteristics of laser-welded joints of the duplex steel W.Nr. 1.4462 was studied. The welding was carried out according to the experimental model with mixtures. The effect of the welding speed and the gas flow rate were ...
Tópico(s): Advanced Welding Techniques Analysis
2011 - Institute of Metals and Technology | Materiali in tehnologije
Branko Kau, Milan Ambro, Samo Kralj,
We have developed an applet presentation showing different structures of a nematic liquid crystal confined to a thin transparent plan-parallel cell. The nematic structures possessing single defects or their pairs may be studied. The corresponding interference textures are shown simulating the polarization optic microscopy experiment. Several parameters defining the experimental set-up can be interactively varied enabling observation of subsequent changes in the interference pattern within a reasonable ...
Tópico(s): Advanced Optical Imaging Technologies
2004 - IOP Publishing | European Journal of Physics
Slobodan Kralj, Branko Bauer, Angela Mustapić,
Laser and TIG welding processes are suitable for welding of thin sheets. Welding of heat-treatable steels causes substantial increase of the hardness in the welded joint area. Laser and TIG welding differ regarding the power density and heat input into the material. High power density in laser welding allows welding with a lower specific heat input compared to TIG welding, thus resulting in very high cooling rates. Butt welds of 2 mm thick heat-treatable steel sheets 25CrMo4 and 42CrMo4 were welded ...
Tópico(s): Advancements in Materials Engineering
2006 - Spanish National Research Council | Revista de Metalurgia
Slobodan Kralj, Branko Radošević, Zoran Kožuh, Ivica Garašić,
Tópico(s): Industrial Engineering and Technologies
2007 - Springer Science+Business Media | Welding in the World
Erika Matos, Borut Jug, Barbara Vidergar – Kralj, Branko Zakotnik,
Guidance on cardiac surveillance during adjuvant trastuzumab therapy remains elusive. The recommended methods are two-dimensional echocardiography (2D-ECHO) and electrocardiography gated equilibrium radionuclide ventriculography (RNV). We assessed the correlation and possible specific merits of these two methods.In a prospective cohort study in patients undergoing post-anthracycline adjuvant trastuzumab therapy, clinical assessment, 2D-ECHO and RNV were performed at baseline, 4, 8 and 12 months. The ...
Tópico(s): Acute Myocardial Infarction Research
2017 - | Minerva Cardiology and Angiology
Željko Reiner, Bojan Jelaković, Davor Miličić, Marija Bubaš, Ines Balint, Nikolina Bašić‐Jukić, Valerija Bralić Lang, Vili Beroš, Ivana Brkić Biloš, Silvija Canecki-Varžić, Krunoslav Capak, Verica Kralj, Ana Ljubas, Branko Malojčić, Viktor Peršić, Ivana Portolan Pajić, Dario Rahelić, Alen Ružić, Tomislav Sokol, Ana Soldo, Ivan Pećin,
Cardiovascular diseases (CVD) are the leading cause of morbidity and mortality worldwide, including in Croatia. Since most patients have multiple disorders and diseases caused largely by the same risk factors, and as it is essential to approach each patient as a person with all disorders, today, we are talking about a new paradigm-cardio-renal-metabolic (CKM) syndrome and cardio-renal-metabolic health, which necessarily includes brain health. Elevated systolic blood pressure, LDL cholesterol, smoking, ...
Tópico(s): Nutritional Studies and Diet
2024 - Multidisciplinary Digital Publishing Institute | Journal of Clinical Medicine
Blaž Hanželič, Jernej Kralj, Tonica Bončina, Branko Nečemer, Janez Kramberger, Roman Satošek, Srečko Glodež,
The plate heat exchanger (PHE) is a component that provides heat to be transferred from hot water to domestic cold water without mixing them with high efficiency. Over the lifetime of the PHE, cyclic pressures act on the brazing points and the plates, and this may lead to fatigue failure. The fatigue behaviour of the PHE, designed using copper-brazed 316L stainless steel, was investigated in this study. First, the fatigue tests under the load ratio R = 0.1 were performed on the Vibrophore 100 testing ...
Tópico(s): Fire effects on concrete materials
2024 - Multidisciplinary Digital Publishing Institute | Materials
Uroš Grošelj, David Kralj, Jernej Wagger, Georg Dahmann, Branko Stanovnik, Jurij Svete,
Treatment of β-keto ester 8 with hydrazines 9a-g gave 1'-substituted tert-butyl 2-(5-hydroxy-1Hpyrazol-3-yl)ethylcarbamates 10a-e and 2-(5-oxo-2,5-dihydro-1H-pyrazol-3-yl)ethylcarbamates 11f,g.Acidolytic deprotection of 10b,c afforded the corresponding 3-(2-aminoethyl)-5-hydroxy-1H-pyrazoles 6b,c in good yields.Acylation of 6 gave either the N-acyl compounds 12b,c and 13c, or the N,O-diacyl derivative 14.Next, three N,N-dialkyl analogues 15a,b and 26c were prepared from dimethyl acetone-1,3-dicarboxylate ...
Tópico(s): Synthesis of heterocyclic compounds
2011 - ARKAT USA, Inc. | ARKIVOC
Marina Lipizer, D. Berto, Branko Čermelj, Maja Fafandjel, M. Formalewicz, Ioannis Hatzianestis, Nikolina Ilijanić, Helen Kaberi, Martina Kralj, Slavica Matijević, Maria Eugenia Molina Jack, Constantine Parinos, Jacek Tronczyński, Michele Giani,
Assessing the status of marine pollution at regional and sub-regional scales requires the use of comparable and harmonized data provided by multiple institutions, located in several countries. Standardized data management and quality control are crucial for supporting a coherent evaluation of marine pollution. Taking the Eastern Mediterranean Sea as a case study, we propose an approach to improve the quality control procedures used for sediment pollution data, thus supporting a harmonized environmental ...
Tópico(s): Heavy metals in environment
2022 - Elsevier BV | Marine Pollution Bulletin
Maria Eugenia Molina Jack, Rigers Bakiu, Ana Castelli, Branko Čermelj, Maja Fafanđel, Christina Georgopoulou, Giordano Giorgi, Iona Athanasia, Damir Ivanković, Martina Kralj, Elena Partescano, Alice Rotini, Melita Velikonja, Marina Lipizer,
Harmonization of monitoring protocols and analytical methods is a crucial issue for transnational marine environmental status assessment, yet not the only one. Coherent data management and quality control become very relevant when environmental status is assessed at regional or subregional scale (e.g. for the Mediterranean or the Adriatic Sea), thus requiring data from different sources. Heavy metals are among the main targets of monitoring activities. Significant efforts have been dedicated to share ...
Tópico(s): Environmental DNA in Biodiversity Studies
2020 - Frontiers Media | Frontiers in Marine Science
Branko Jenko, Aljoša Košak, Dušan Milivojević, B. Kralj,
Tópico(s): Phenothiazines and Benzothiazines Synthesis and Activities
1983 - Birkhäuser | Agents and Actions
Jurij Svete, Darja Žerovnik, Uroš Grošelj, D. Kralj, C. Malavasic, Jure Bezenšek, Georg Dahmann, Katarina Stare, Anton Meden, Branko Stanovnik,
Corrected by: Synthesis of 1,5,6,7-Tetrahydro-4H-pyrazolo[4,3-c]pyridin-4-ones as Conformationally Constrained Pyrazole Analogues of HistamineSynthesis 2010; 2010(19): e4-e4DOI: 10.1055/s-0030-1258257
Tópico(s): Phenothiazines and Benzothiazines Synthesis and Activities
2010 - Thieme Medical Publishers (Germany) | Synthesis
Tatjana Čelik, Simona Kralj‐Fišer, Urban Šilc, Filip Küzmič, Branko Vreš,
Abstract In this study, we focus on Coenonympha oedippus , an endangered butterfly species protected under Annexes II and IV of the EU Habitats Directive. Predominantly inhabiting semi‐open wet grasslands across Europe, this species also occupies abandoned sub‐Mediterranean dry grasslands. Ecological distinctiveness in its habitat use is reflected in differences in larval host plants, wing morphology and genetic composition, resulting in two ecotypes: wet and dry. Notably, by 2018, only one population ...
Tópico(s): Species Distribution and Climate Change
2024 - Wiley | Insect Conservation and Diversity
Branko Bauer, Slobodan Kralj, Martin Miculinić,
Tópico(s): Hydrogen embrittlement and corrosion behaviors in metals
2007 - Springer Science+Business Media | Welding in the World
Branko Bauer, Slobodan Kralj, Zoran Kožuh, L. Dorn,
Abstract Small additions of oxygen or carbon dioxide to argon shielding at laser beam welding can increase welding speed and productivity and decrease the mechanical properties of welded joints. The effect of the type of active shielding gas mixtures based on argon with additions of oxygen and/or carbon dioxide upon the local mechanical properties of laser welded joints of heat‐treatable steel 25 CrMo 4 was studied. Microshear test method has been used to investigate the local mechanical properties ...
Tópico(s): Engineering and Environmental Studies
2011 - Wiley | Materialwissenschaft und Werkstofftechnik
Branko Tantegel, Davorin Kralj,
In May 2001 European Commision adopted sustainable development strategy focused on long-term politics and actions on various fields including economic, social and ecological; previously mentioned adopted new concepts linked with sustainable development present new challenges for Slovenian companies. Managers are key factor which can have impact on sustainable development, because they are familiar with the natural state of affairs in bussiness due to possesing right informations and secondly they ...
Tópico(s): Supply Chain Resilience and Risk Management
2011 - De Gruyter Open | Organizacija
David Kralj, Uroš Grošelj, Anton Meden, Georg Dahmann, Branko Stanovnik, Jurij Svete,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Synthesis of heterocyclic compounds
2008 - Wiley | ChemInform
Lucija Zupančič Kralj, A Hvala, Jurij Svete, L. Golič, Branko Stanovnik,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Click Chemistry and Applications
1997 - Wiley | ChemInform
Jernej Kralj, Blaž Hanželič, Srečko Glodež, Janez Kramberger, Roman Satošek, Branko Nečemer,
The plate heat exchanger (PHE) is a component that provides heat to be transferred from hot water to domestic cold water without mixing them with high efficiency. Over the lifetime of the PHE, cyclic pressure acts on the brazing points and the plates, and this may lead to fatigue failure. The fatigue behaviour of the PHE, designed by using copper-brazed 316L (also known as 1.4404) stainless steel, was investigated by performing fatigue tests to obtain the S-N curve of the analysed brazed joint. The ...
Tópico(s): Metallurgy and Material Forming
2024 - Institute of Metals and Technology | Materiali in tehnologije
Jurij Svete, Darja Žerovnik, Uroš Grošelj, D. Kralj, C. Malavasic, Jure Bezenšek, Georg Dahmann, Katarina Stare, Anton Meden, Branko Stanovnik,
Correction to: Synthesis of 1,5,6,7-Tetrahydro-4H-pyrazolo[4,3-c]pyridin-4-ones as Conformationally Constrained Pyrazole Analogues of HistamineSynthesis 2010; 2010(19): 3363-3373DOI: 10.1055/s-0030-1257864
Tópico(s): Click Chemistry and Applications
2010 - Thieme Medical Publishers (Germany) | Synthesis