Hydrogen permeation through SrCe₀.₇Zr₀.₂Eu₀.₁O₃₋δ membranes was investigated as a function of temperature, feed H₂O partial pressure, feed H₂ partial pressure and flow rate. Hydrogen permeation flux ...was proportional to the transmembrane H₂ partial pressure gradient with a 1/4 dependence. A maximum H₂ permeation flux of 0.23 and 0.21cm³/cm²min was obtained at 900°C for 100% H₂ and 97vol% H₂/3vol% H₂O conditions, respectively. The activation energy decreased with increasing H₂ partial pressure and/or decreasing steam partial pressure. Permeation flux through the SrCe₀.₇Zr₀.₂Eu₀.₁O₃₋δ membrane was stable under wet H₂, water gas shift reaction and steam reforming of methane conditions.
U ovom se radu štovanje Bezgrešnog Srca Marijina promišlja unutar dvaju temeljnih marioloških postulata, koje je, vraćajući se novozavjetnoj i otačkoj mariologiji, definirao Drugi vatikanski koncil: ...svi mariološki sadržaji, a onda i sadržaji marijanskog štovanja, kristološki su utemeljeni i eklezijalno usmjereni. U prvom se dijelu rada stoga najprije analizira štovanje Srca Isusova i njegovo dogmatsko utemeljenje u teologiji utjelovljenja. Riječ je o prihvaćanju i štovanju otajstva hipostatskog sjedinjenja, dakle štovanju Kristove božansko‑ljudske ljubavi usmjerene ljudskom otkupljenju. Prati se povijesni razvoj i teološki sadržaj tog štovanja, polazeći od ranih kristoloških koncila do enciklike Haurietis aquas Pija XII. Kristološki utemeljena theologia cordis postaje zatim uporište i kriterij interpretacije štovanja Bezgrešnog Srca Marijina u drugom dijelu rada. Polazeći od novozavjetnih mjesta i ukaza, prati se povijesni razvoj i teološki sadržaj tog oblika marijanskog štovanja. Konačno, u trećem dijelu rada, vodeći se kristološko‑eklezijalnim utemeljenjem koncilske mariologije, prepoznaju se teološki najznačajniji i eklezijalno‑soteriološki najrelevantniji elementi tog štovanja. Polazeći od vjerničkog aspekta Srca Marijina i njezine povezanosti sa Sinom, otkriva se duboka povezanost srca Majke i srca Sina, savršeno i potpuno suglasje u zajedničkoj okrenutosti volji nebeskog Oca. Sukladno koncilskoj mariologiji i njezinim naglascima o uzornosti Marije za Crkvu, zaključno se upravo taj element prepoznaje kao glavni teološki sadržaj vjerničkog štovanja i nasljedovanja Srca Marijina. Tako se to štovanje izdvaja i bitno razlikuje od banalnih projekcija ljudske afektivnosti, a usmjerava se vjerničkom slušanju i egzistencijalnom prihvaćanju Božje Riječi. Srce Marijino biva prepoznato kao realan simbol Crkve, što u dosljednom provođenju upućuje na dvostruku osjetljivost Crkve: osjetljivost za Božju volju i osjetljivost za potrebe svakog čovjeka.
The work discusses a correlative relationship between the notions of the personal and the private in the context of biblical psalmist’s piety. Elements of anthropology (heart, soul, face) will obtain ...considerable importance, particularly the ideas of face and soul ( פנה and נפש ). These will be corresponding to the Greek idea of προσοπων (prosopon), person. The authors will insist on the distinction between the ideas of personal and private, but they will also recognize the interdependence of these ideas, in recognition that the individual and the societal, are both contributions in the building of the subject as the self. In Paul’s Hymn to Love (1 Cor. 13) the complementary nature between the personal and the private is evident. There we find both passive and active subject’s role claiming this double aspect of the human subject - personal and private. Discussion in this work follows longterm debates over the nature of the subject, its personality, and its privacy.
SrCe0.9Eu0.1O3-α (SCEu-SG) electrolyte was prepared via the sol-gel method at a low heat-treating temperature of 1100 oC. The transport properties of SCEu-SG are studied using gas concentration ...cells. The results indicate that the protonic conduction of SCEu-SG is good in hydrogen-containing atmospheres. SrCe0.9Eu0.1O3-α-NaCl-KCl (SCEu-SG-NK) composite electrolyte was also fabricated and tested at between 500-700 °C. The conductivity of SCEu-SG-NK was observed to be 1.44×10-1 S·cm-1 in dry nitrogen at 700 °C. A maximum power density of 207 mW·cm-2 at 700 °C was achieved for the fuel cell based on the SCEu-SG-NK composite electrolyte which is much higher than that of single cerium strontium material, SCEu-SG (13.1 mW·cm-2).
U središtu Ps 90, koji pripada mudrosnoj meditaciji, je čovjekova patnja zbog prolaznosti vremena. Promišljaju i o čovjekovoj prolaznosti u svjetlu Božje vječnosti, psalmist traži smisao svojeg ...postojanja, mole i Gospodina da ga nauči brojiti svoje dane kako bi stekao mudro srce. Kako brojiti svoje dane i što znači mudro srce? To su pitanja na koja ćemo pokušati odgovoriti u ovom radu. Prvi dio rada posvećen je pitanju autorstva, književnom rodu i strukturi Ps 90 prema kojoj se u drugom dijelu pristupa egzegetsko -teološkoj analizi s posebnim osvrtom na obilježja Božjega i čovjekova lica koja proizlaze iz samog psalma. Posljednji, i za naše istraživanje najznačajniji dio rada, pokušava odgovoriti na uvodna pitanja, definiraju i čovjekovo mudro srce te određuju i neke od njegovih temeljnih značajki kao što su: prihvaćanje vremenitosti, preuzimanje odgovornosti, življenje granica i otkrivanje vrijednosti malenosti.
In the center of Ps 90, which belongs to sapiential meditation, is a human being suffering because of the transience of time? By reflecting on human beings' transience in the light of Divine eternity, the psalm writer searches for the meaning of his existence and prays to the Lord to teach him how to number his days so that he may gain a heart of wisdom. How should one number his/her days and what is the meaning of a heart of wisdom? These are the questions this article will attempt to answer. The first part of the article deals with the issues of authorship, literary genre, and structure of Ps 90, while the second part engages in an exegetical -theological analysis with an emphasis on traits of Divine and human face that the psalm portrays. The last and for this study the most important part of the article tries to respond to the introductory questions by defining the human heart of wisdom and by determining some of its most fundamental traits, such as acceptance of transience, taking on responsibility, living out boundaries, and discovery of the value of smallness.
Reverse water‐gas shift reaction (RWGS) is important in the CO2 utilization cycle to convert carbon dioxide (CO2) and hydrogen (H2) to carbon monoxide (CO). In this work, the RWGS performance is ...evaluated by utilizing Ti4O7‐doped SrCe0.9Y0.1O3‐δ (SCY‐b) hollow fibre membrane reactor where H2 permeates through the SCY‐b proton conducting membrane and reacts with CO2 feed gas. Upon increasing the temperature from 750 to 950 °C, the CO yield increased from a negligible value to 14.82 %, when the sweep gas flow rate was 50 mL min−1 H2‐He (50:50 vol. ratio) and the feed gas flow rate was 100 mL min−1 CO2‐N2 (5:95 vol. ratio). The CO yield increase with the temperature increase reflects the enhanced H2 permeation flux through the SCY‐b membrane at higher temperatures. Higher CO2 concentration in the feed gas led to lower CO yield due to the higher amount of remaining CO2 in the outlet stream. The deposition of porous SCY or SCY‐b surface layer onto the hollow fibre outer circumference surface also increased H2 flux through the fibre relative to the non‐deposited one. Thermogravimetric and CO2‐temperature programmed desorption results further reveal that SCY‐b adsorbed CO2 at temperature above 500 °C due to the reaction between CO2 and SCY‐b material. Despite the formation of SrCO3 during RWGS, the SCY‐b hollow fibre membrane reactor still displayed a stable CO yield of around 14 % throughout the 6‐day continuous membrane reactor test.
Umjerenost u svemu – sportsko srce Reschner, Ana; Jakuš, Nina; Fabijanović, Dora ...
Medicus (Zagreb, Croatia : 1992),
10/2019, Letnik:
28, Številka:
2 Tjelesna aktivnost
Journal Article
Recenzirano
Odprti dostop
Brojna klinička istraživanja dokazala su jasne koristi tjelesne aktivnosti za kardiovaskularno, ali i opće zdravlje svakoga čovjeka. Tjelesna aktivnost izaziva fiziološki odgovor organizma koji ...dovodi do različitih prilagodba pojedinih organskih sustava, a primjer jedne od njih jest i sportsko srce – benigni i reverzibilni odgovor kardiovaskularnog sustava na ponavljanu i intenzivnu tjelesnu aktivnost. Neke bolesti miokarda mogu dijeliti slične elektrokardiografske, ehokardiografske i druge karakteristike sa sportskim srcem. Pravodobno prepoznavanje takvih bolesti ključno je za zaštitu zdravlja svih koji se bave intenzivnijom tjelesnom aktivnosti rekreativno ili profesionalno.
The structural, electronic and optical properties of SrCe
2
O
4
were calculated using the density functional theory. The optimized unit cells are in good agreement with experimental data. The ...mechanical stability of SrCe
2
O
4
has been confirmed by calculation of the elastic constants. Additionally, the band structure, density of states and the partial density of states were obtained. It was shown that the SrCe
2
O
4
crystals belong to the semiconductor with a direct band gap of about 3.29 eV using LDA functional. The optical properties including the dielectric spectra, absorption coefficient spectra, reflectivity, and the real part of the refractive index spectra are also presented.
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