Jedan od mogućih pravaca dekarbonizacije i elektrifikacije teretnog i putničkog transporta je upotreba gorivnih ćelija sa vodonikom kao pogonskim gorivom. S obzirom da je primena biomase za ...proizvodnju električne energije u velikoj meri nekonkurentna u odnosu na vetroelektrane i solarne elektrane, njena primena za dobijanje vodonika predstavlja jedan od mogućih pravaca razvoja ovog obnovljivog izvora energije. U ovom radu su analizirane tehnologije za proizvodnju vodonika iz biodizela. Izvršena je analiza strukture i ukupnih troškova proizvodnje vodonika iz biodizela, kao i energetski bilans ovog procesa. Sagledani su uslovi korišćenja vodonika za pogon gorivnih ćelija u električnim vozilima. Sprovedena je analiza efikasnosti energetskog ciklusa: biodizel – vodonik – električna energija – mehanička energija za pogon električnih vozila. Kao krajnji rezultat izvršena je procena troškova proizvodnje kWh električne energije iz biodizela i uporedna analiza sa vozilom koje je pogonjeno dizel motorom i električnim motorom napajanim iz baterija.
One of the possible directions of decarbonisation and electrification of freight and passenger transport is the use of fuel cells with hydrogen as a fuel. Considering that the use of biomass for ...electricity generation is largely uncompetitive compared to wind and solar power plants, its use for hydrogen production is one of the possible directions of development of this renewable energy source. In this paper, technologies for hydrogen production from biodiesel were analyzed. An analysis of the structure and total costs of hydrogen production from biodiesel was performed, as well as the energy balance of this process. The conditions of using hydrogen to drive fuel cells in electric vehicles were considered. The efficiency of the energy cycle analysis was performed: biodiesel - hydrogen - electricity - mechanical energy to drive electric vehicles. As a final result, an estimation of the costs of production of kWh of electricity from biodiesel and a comparative analysis with a vehicle powered by a diesel engine and an electric motor powered by batteries was performed.
Hypertrophic obstructive cardiomyopathy (HOCM) is an idiopathic disease frequently associated with systolic anterior motion (SAM). The anterior leaflet of mitral valve is sucked by Ventury effect ...into the left ventricle outflow tract making subaortic stenosis more severe and producing mitral insufficiency at the same time. Septal myectomy along with mitral valve replacement has been the treatment of choice for a long time. An understanding of pathoanatomy and hemodynamics of the disease has opened possibility for total reconstructive treatment of both subaortic stenosis and mitral insufficiency in such patients. This is a case report of 50-year-old male with severe subaortic stenosis (136/70 mmHg) due to HOCM and SAM along with grade IV mitral insufficiency. Septal myectomy was performed. Mitral insufficiency was managed by reducing the height of posterior cusp along with remodeling of mitral annulus by Carpentier-Classic ring. In that way, subaortic obstruction was reduced to 30.9/10 mmHg while mitral insufficiency was lowered to negligible level. The patient was discharged from hospital with sinus rhythm eight days after the surgery.
Hypertrophie obstructive cardiomyopathy (HOCM) is an idiopathic disease frequently associated with systolic anterior motion (SAM). The anterior leaflet of mitral valve is sucked by Ventury effect ...into the left ventricle outflow tract making subaortic stenosis more severe and producing mitral insufficiency at the same time. Septal myectomy along with mitral valve replacement has been the treatment of choice for a long time. An understanding of pathoanatomy and hemodynamics of the disease has opened possibility for total reconstructive treatment of both subaortic stenosis and mitral insufficiency in such patients. This is a case report of 50-year-old male with severe subaortic stenosis (136/70 mmHg) due to HOCM and SAM along with grade IV mitral insufficiency. Septal myectomy was performed. Mitral insufficiency was managed by reducing the height of posterior cusp along with remodeling of mitral annulus by Carpentier-Classic ring. In that way, subaortic obstruction was reduced to 30.9/10 mmHg while mitral insufficiency was lowered to negligible level. The patient was discharged from hospital with sinus rhythm eight days after the surgery.
Hipertroficna opstrukciona kardiomiopatija je cesto komplikovana dinamskom opstrukcijom izlaznog trakta leve komore srca. Prednji listic mitralnog zaliska biva privucen Venturijevim efektom ka izlaznom traktu leve komore, cime povecava subaortnu opstrukciju, a, s druge strane, ne koaptira sa zadnjim listicem mitralnog zaliska, sto dovodi do mitralne insuficijencije. Septalna miektomija i zamena mitralnog zaliska je doskora bila terapija izbora. Pravilnim razumevanjem patoanatomije problema razvijena je mogucnost potpunog rekonstrukcionog lecenja bolesti. Ovo je prikaz bolesnika starog 50 godina kod kojeg je dijagnostikovana teska subaortna stenoza sa subaortnim gradijentom pritiska od 136/70 mm Hg usled hipertroficne opstrukcione kardiomiopatije i dinamske opstrukcije izlaznogtrakta leve komore kombinovane sa teskom mitralnom insuficijencijom IV stepena. Uradjena je septumska miektomija, a mitralna insuficijencija je resena rekonstrukcijom tako sto je smanjena visina zadnjeg kuspisa mitralne valvule, a anulus remodelovan prstenom Carpentier Classic. Bolesnik je pusten iz bolnice osmog dana nakon operacije sa subaortnim gradijentom od 30,9/10,6 mm Hg, bez znakova dinamske opstrukcije i sa trivijalnom mitralnom insuficijencijom.
Razmena darova Aćimović Ivkov, Mileta; Despić, Đorđe; Babić, Dragan ...
Polja (Novi Sad : 1955),
2011
470
Magazine Article
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Dragan Babić: ZBOG PRIČE SAM OVDE? (Srđan V. Tešin: Ispod crte, Stubovi kulture, Beograd, 2010)
Ala Tatarenko: SPLIT, SPLET, SPLIT (Slavoljub Stanković: Split, Geopoetika, Beograd, 2010)
Miroljub Milanović: PESMA KAO POKUŠAJ DA SE ISKAŽE NEIZRECIVO (Zoran M. Mandić: Bog u prodavnici ogledala, Intelekta, Valjevo, 2010)
Marjan Čakarević: NEBO IZNAD BERLINA (Sara Kirš: Crno ogledalo: izabrane pesme i lirska proza, Agora, Zrenjanin, 2011)
Mileta Aćimović Ivkov: PUT DO PESME (Dragica S. Ivanović: Osvešćeni zaborav, Narodna biblioteka "Stefan Prvovenčani", Kraljevo, 2010)
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