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López Rocha, Nayelli,Ryzhkov, Andrii 고려대학교 한국언어문화학술확산연구소 2019 Journal of Korean Culture Vol.47 No.-
This study will reveal the perceptions of the members of the Korean community about several basic aspects at the time when Hallyu and the K-dramas started to gain popularity in Latin America and particularly in Mexico. This allows us to see if Koreans residing in Mexico perceived Korean cultural products as an element that correctly represents their society or their culture abroad, thus demonstrating the identity correspondence that was restructured and reinforced by the Korean government through cultural products of that period. Therefore, this work examines how the cultural policy initiated by the Korean government influenced the identity formation of the Koreans living in the Mexico-City. The study provides the basis for comparative studies to reflect on the perceptions of Korea by Korean citizens in Mexico. 본 연구는 한류와 드라마가 중남미 특히 멕시코에서 인기를 얻기 시작한 시점에 K- , 당시 한국 교민 사회의 구성원들이 한류 현상의 기반이 되는 여러 요소들을 어떻게 인식하고 있었는지를 밝히는데 초점을 맞추고 있다 외국인으로서 멕시코시티에 거주 . 하는 한국 교민들이 자국의 문화적 상품을 한국 사회 혹은 문화의 대표성을 갖춘 요 , 소로 보고 있었는지를 밝히고 또 본 논문은 대한민국 정부로부터 기획된 이러한 문화 , 정책이 어떻게 멕시코 재외교민의 정체성 형성에 영향을 미쳤는가를 연구한다 그러 . 므로 본 논문은 멕시코에 거주하는 한국 교민을 대상으로 한국에 대한 인식을 파악하고자 하는 비교연구를 위한 단초를 제공한다.
Enrique Rocha-Rangel,Juan López-Hernández,José A. Rodríguez-García,Eddie N. Armendáriz-Mireles,Carlos A. Calles-Arriaga,W. J. Pech-Rodríguez,José A. Castillo-Robles 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.8
In this work, strontium titanate samples were prepared starting from SrCO3 and TiO2 powders mixture. Raw materials wereactivated mechanically in a planetary mill and then calcined at different temperatures (900 to 1300 oC). Powders after grindingwere analyzed by differential thermal analysis in order to follow the carbonate decomposition. On the other hand, samplesresulting from heat treatment were characterized by XRD, SEM and electrical measurements. XRD analysis determines thatSrTiO3 synthetized presents the cubic structure of perovskite. Complete reaction for SrTiO3 compound formation occurs at1200 oC. SEM observations indicate the presence of a microstructure with very small gran size and consequently a largenumber of grain boundaries. Electrical measurements suggest the formation of a material with high insulating capacity. Withthis evidence, it can be concluded that solid state reactions activated mechanically, proved to be an effective way to fabricatestrontium titanate compound with very fine microstructure and high insulating behavior.
Physical Properties of the Sr4Al6O12SO4 Ceramic Compound
J.A. Rodríguez-García,E. Rocha-Rangel,J. López Hernández,C.A. Hernández Bocanegra,A.L. Leal Cruz,J.M. Almanza Robles,J. Torres Torres 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.11
The Sr4Al6O12SO4 ceramic compound was synthesized by a solid state reaction starting from stoichiometric mixtures of 3 : 3 : 1 molar ratio of reactive grade of SrCO3, Al2O3 and SrSO4, respectively. Cylindrical samples were confirmed by uniaxial pressing at 100 MPa and were heat treated at 1400 oC during 4 hrs. Subsequently, the samples were ground and re-conformed in cylindrical shape samples by uniaxial pressing at 300 MPa. The new samples were heat treated at 1400 oC during 24 hrs. This process was done in order to increase density of the samples. The Sr4Al6O12SO4 ceramic compound was characterized by the study of its physical properties such as: density, micro-hardness, thermal expansion and stability, enthalpy of formation, magnetic properties and electrical conductivity. Experimental results show that the maximum density obtained for the Sr4Al6O12SO4 ceramic compound was 2.913 grcm−3, with thermal expansion coefficient of 10.12E−06(oC−1); it also presents an enthalpy of 2.3 KJmol-1 and an excellent thermal stability at elevated temperatures in different atmospheres. In addition, the Sr4Al6O12SO4 ceramic compound is neither electrically conductive nor magnetic.
The Role of Mitochondrial Dynamic Dysfunction in Age-Associated Type 2 Diabetes
Vezza Teresa,Díaz-Pozo Pedro,Canet Francisco,de Marañón Aranzazu M.,Abad-Jiménez Zaida,García-Gargallo Celia,Roldan Ildefonso,Solá Eva,Bañuls Celia,López-Domènech Sandra,Rocha Milagros,Víctor Víctor M 대한남성과학회 2022 The World Journal of Men's Health Vol.40 No.3
Mitochondrial dynamics, such as fusion and fission, play a critical role in maintaining cellular metabolic homeostasis. The molecular mechanisms underlying these processes include fusion proteins (Mitofusin 1 [MFN1], Mitofusin 2 [MFN2], and optic atrophy 1 [OPA1]) and fission mediators (mitochondrial fission 1 [FIS1] and dynamin-related protein 1 [DRP1]), which interact with each other to ensure mitochondrial quality control. Interestingly, defects in these proteins can lead to the loss of mitochondrial DNA (mtDNA) integrity, impairment of mitochondrial function, a severe alteration of mitochondrial morphology, and eventually cell death. Emerging evidence has revealed a causal relationship between dysregulation of mitochondria dynamics and age-associated type 2 diabetes, a metabolic disease whose rates have reached an alarming epidemic-like level with the majority of cases (59%) recorded in men aged 65 and over. In this sense, fragmentation of mitochondrial networks is often associated with defects in cellular energy production and increased apoptosis, leading, in turn, to excessive reactive oxygen species release, mitochondrial dysfunction, and metabolic alterations, which can ultimately contribute to β-cell dysfunction and insulin resistance. The present review discusses the processes of mitochondrial fusion and fission and their dysfunction in type 2 diabetes, with special attention given to the therapeutic potential of targeting mitochondrial dynamics in this complex metabolic disorder.
Effect of agave fructans on the production of short chain fatty acid in mice
Silvia M. Gonza´lez-Herrera,Luis E. Simental-Mendı´a,Mercedes G. Lo´pez,Nuria E. Rocha-Guzma´n,Olga M. Rutiaga-Quin˜ones,Rau´ l Rodrı´guez-Herrera,Claudia I. Gamboa-Go´mez 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.5
The aim of this study was to evaluate the effect of agave fructans on short chain fatty acid (SCFA) production in mice (C57BL/6). Animals were randomly divided into three groups (n = 8): control group (CG), fructans from Agave tequilana group (FG) (55 g per day/kg of body weight), and oligrofructose group (OG) (55 g per day/kg of body weight). Treatments were administered oral via for 6 weeks. After 24 days of treatment (phase 1), both treated groups exhibited elevated levels of acetic (12%) and propionic (FG 66% and OG 38%) acids in comparison with the CG. After 42 days of treatment (phase 2), FG had higher concentrations of acetic (33%) and propionic (73%) acids than the CG; while OG exhibited higher levels of butyric (12%) and propionic (35%) acids compared with the CG. Fructans from Agave tequilana improve the production of SCFA in mice, suggesting a prebiotic activity.