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2441
La reforma electoral a Catalunya: fracassos i expectatives
Published 2024-12-01“…Avui, la reforma segueix essent encara molt difícil, malgrat la presència d’alguns indicis més favorables.…”
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2442
Synthesis and Downconversion Emission Property of Yb2O3:Eu3+ Nanosheets and Nanotubes
Published 2013-01-01“…Ytterbium oxide (Yb2O3) nanocrystals with different Eu3+ (1%, 2%, 5%, and 10%) doped concentrations were synthesized by a facile hydrothermal method, subsequently by calcination at 700°C. The crystal phase, size, and morphology of prepared samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). …”
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2443
Anodization Parameters Influencing the Growth of Titania Nanotubes and Their Photoelectrochemical Response
Published 2012-01-01“…Photoelectrochemical response under illumination was enhanced by using the calcined TNT and is strongly affected by its dimensional changes. …”
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2444
Synthesis of Fe-MCM-41 Using Iron Ore Tailings as the Silicon and Iron Source
Published 2012-01-01“…The synthesized sample had high surface area, and part of iron atoms is retained in the framework with formation of tetrahedron after removal of the template by calcinations. The results obtained in the present work demonstrate the feasibility of employing iron ore tailings as a potential source of silicon and iron to produce Fe-MCM-41 mesoporous materials.…”
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2445
Production of Mg-Li alloys by aluminothermic vacuum reduction
Published 2020-01-01“…The results show that Mg–Li alloys can be produced by vacuum aluminothermic reduction using calcined magnesite and lithium carbonate. MgO was relatively easier to reduce by aluminum than Li2O. …”
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2446
Oyster and Pyramidella Shells as Heterogeneous Catalysts for the Microwave-Assisted Biodiesel Production from Jatropha curcas Oil
Published 2015-01-01“…Microwave-assisted biodiesel production via transesterification of Jatropha curcas oil with methanol using solid oxide catalyst derived from waste shells of oyster and Pyramidella was studied. The shells were calcined at 900°C for 2 h and calcium oxide (CaO) catalyst characterizations were carried out by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscope (SEM), and the Brunauer-Emmett-Teller (BET) surface area measurements. …”
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2447
Microstructural Study of Neodmium Nickelate Doped with Strontium Synthesized by Gelatin Method
Published 2013-01-01“…Samples of Nd2-xSrxNiO4 (x=0 and 0.4) were calcined at 700 and 900°C at a heating of 10°C/min for 4 hours. …”
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2448
Sosyo-Kültürel Değerler Bağlamında Sanat Sosyolojisi
Published 2023-04-01“…Dolayısıyla herhangi bir toplumun sanat anlayışını, ağırlık verdiği sanat dalını ve biçim-içerik bağlantısını doğru kavrayabilmenin yolu, o toplumun kültürel değerlerini anlamakla mümkün olacaktır.…”
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2449
Study of Photocatalytic Activity and Properties of Transition Metal Ions Doped Nanocrystalline TiO2 Prepared by Sol-Gel Method
Published 2014-01-01“…All the prepared samples were calcined at different temperatures like 200°C to 800°C and characterized by X-ray diffraction (XRD) and energy dispersive X-ray (EDX) analysis. …”
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2450
Densely populated single‐atom catalysts for boosting hydrogen generation from formic acid
Published 2025-01-01“…However, the formation of metal nanoparticles in M‐N‐C materials is coupled with high‐temperature calcination conditions, limiting the density of M‐Nx active sites and thus restricting the catalytic performance of such catalysts. …”
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2451
Photodegradation of Bisphenol A Using α-Fe2O3 Nanoparticles Synthesized by Sonochemical Assisted
Published 2024-04-01“…In this work, α‑Fe2O3 nanoparticles were prepared by sonochemical‑assisted method along with calcination at two different temperatures 500 and 700°C for 3h. …”
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2452
Effect of modified phosphogypsum on the dimensional stability of supersulfated cement-based materials
Published 2025-07-01“…Taking the point of decrease in internal relative humidity as the time-zero of autogenous shrinkage, the lime neutralized PG (NPG) reduced the autogenous shrinkage of SSCM by 15.03 % at 28 days and 16.26 % at 90 days, suppressing the development of autogenous shrinkage in SSCM. However, the calcined PG (CPG) displayed the opposite trend. Both modified PG improved the drying shrinkage of SSCM, and the NPG resulted in less water loss. …”
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2453
Alkali Metal Modification of Silica Gel-Based Stationary Phase in Gas Chromatography
Published 2013-01-01“…Modification of the precipitated silica gel was done by treatment with alkali metal (NaCl) before and after calcination. The silica surfaces before and after modification were confirmed by infrared spectroscopy in order to observe the strength and abundance of the acidic surface OH group bands which play an important role in the adsorption properties of polar and nonpolar solutes. …”
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2454
Removal of Formaldehyde Using Highly Active Pt/TiO2 Catalysts without Irradiation
Published 2013-01-01“…The reduced Pt/TiO2 catalyst (denoted as Pt/TiO2-H2) showed much higher activity than that calcined in air (denoted as Pt/TiO2-air). More than 96% of the conversion of HCHO was obtained over 0.5 wt% Pt/TiO2-H2, on which highly dispersed metallic Pt nanoparticles with very small size (~2 nm) were identified. …”
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2457
Mantığın İslam Fıkhında Yeri ve Müçtehit ile İlişkisi
Published 2023-06-01“…Bu bağlamda çalışmada İslâm âlemine girdikten sonra müçtehitlerin farklı yaklaşımlarının söz konusu olduğu mantık ilminin İslâm fıkhındaki yeri, müçtehit ile ilişkisi ve müçtehit açısından gerekliliği ortaya konulmaya çalışılacaktır.…”
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2458
Efficacy analysis of drug-eluting beads transcatheter arterial chemoembolization combining systemic chemotherapy and immune checkpoint inhibitors in unresectable intrahepatic chola...
Published 2025-01-01“…Methods This study used retrospective cohort analysis to collect the clinical data of 209 patients with unresectable intrahepatic cholangiocarcinoma treated in Linyi Cancer Hospital, Affiliated Zhongshan Hospital of Dalian University, Affiliated Central Hospital of Dalian University of Technology from January 2020 to January 2024. …”
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2459
Problématiser en fin de second cycle universitaire : analyses de produits et de processus. Un cas limite, le dossier documentaire du CAPES de documentation
Published 2007-03-01“…Parmi les épreuves d’admissibilité du CAPES de documentation celle du dossier documentaire est un cas limite par ses exigences en ce domaine – étendue et hétérogénéité du dossier à traiter et temps accordé pour le faire. Dans le but d’affiner le modèle de la problématisation du CREN, on analyse donc un lot de copies de concours et la progression sur une année universitaire des copies rédigées par des candidats. …”
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2460
Rušenje mostova
Published 2022-12-01“…Mostovi su konstrukcije kojima se ostvaruje visinsko svladavanje postojećih prepreka, a njihova gradnja seže daleko u povijest. Prvi mostovi bili su pješački, a često je srušeno deblo preko prepreke predstavljalo konstrukciju mosta. …”
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