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Stein-type estimation in logistic regression models based on minimum Φ-divergence estimators
M.L. Menéndez,L. Pardo,M.C. Pardo 한국통계학회 2009 Journal of the Korean Statistical Society Vol.38 No.1
In this paper we present a study of Stein-type estimators for the unknown parameters in logistic regression models when it is suspected that the parameters may be restricted to a subspace of the parameter space. The Stein-type estimators studied are based on the minimum phi-divergence estimator instead on the maximum likelihood estimator as well as on phi-divergence test statistics.
Kinetic study and hydrogen peroxide consumption of phenolic compounds oxidation by Fenton’s reagent
Ana de Luis,Amaia Menéndez,José Ignacio Lombraña,Fernando Varona 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.1
Synthetic solutions of phenol, o-, m- and p-cresol were oxidised by using Fenton’s reagent. The application of substoichiometric dosage of H2O2 led to the formation of intermediate compounds, continuing later the oxidation to complete oxidation. An important objective was to analyze the effect of hydrogen peroxide dosage applied and the reaction pH together with the iron oxidation state on the degradation level. A kinetic model was derived from a reaction mechanism postulated which was used to analyze the results of the experiments. Another aim was to analyze the hydrogen peroxide consumption. Noteworthy results include an increase in oxidant consumption to intensify phenol removal. Furthermore, oxidant consumption was analyzed through the ratio H2O2 to phenol removed and the average specific rate of removal (ASRR). By analyzing these two parameters it has been possible to ascertain the most favorable strategy for an efficient application of H2O2.
Santy Peraza-Echeverria,Jorge M. Santamaría,Gabriela Fuentes,Mariana de los Ángeles Menéndez-Cerón,Miguel Ángel Vallejo-Reyna,Virginia Aurora Herrera-Valencia 한국유전학회 2012 Genes & Genomics Vol.34 No.4
The NPR1 (non-expressor of pathogenesis related gene 1) gene was initially identified in Arabidopsis as a master regulator of the systemic acquired resistance (SAR). Five additional NPR1 homologues have been identified in Arabidopsis whose function range from regulators of SAR to plant development. In the present study, we characterized the structure, phylogeny and expression of the NPR1 family in papaya (Carica papaya L.), one of the most important tropical fruit crops. We identified four NPR1 homologues in the papaya genome sequence (CpNPR1 to CpNPR4). Overall, the four papaya predicted NPR1 proteins showed the characteristic BTB/POZ and ankyrin domains of the Arabidopsis NPR1 family. Twelve additional open reading frames showing homology to retrotransposon elements or genes involved in different physiological processes were found in close proximity to the papaya NPR1homologues. The phylogenetic analysis revealed that the papaya NPR1 sequences resolved in three clades, each clade containing two Arabidopsis NPR1 homologues involved either in the positive regulation of SAR (clade I), negative regulation of SAR (clade II) or plant development (clade III), suggesting a similar function for the corresponding papaya NPR1homologues. Furthermore, the expression of the four papaya NPR1 homologues was detected in both vegetative and reproductive tissues. The present study has provided the first comparative analysis of the NPR1 family in a tropical fruit crop and expanded our knowledge on this type of genes in dicotyledoneous plants. The identification of the full set of papaya NPR1 homologues will pave the way for their systematic functional analysis and new opportunities for engineering disease resistance in this crop.
A. Sanz-Martínez,J. Lasobras,J. Soler,J. Herguido,M. Menéndez 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Methanol to Gasoline (MTG) process transforms methanol to hydrocarbons within the boiling point rangeof gasoline. The result is a wide spectrum of products (olefins, paraffins, aromatics and naphthenics,among others), with the total conversion of methanol to hydrocarbons and water. Catalyst deactivationby coke is a main problem in this process. This work aims to determine the feasibility of carrying out theproduction of gasoline from methanol in a two-zone fluidized bed reactor (TZFBR). The hypothesis is thatthe formation of carbonaceous deposits (coke) on the catalyst particles can be counteracted by its combustionin the regeneration zone that this novel reactor presents, thus achieving stable and continuousoperation. In this way, both processes (reaction and regeneration) would be being carried out simultaneouslyin the same reactor (process intensification). The comparison of results between a conventional fluidizedbed reactor and a TZFBR shows that the second one actually provides a better stability over time.
( Men Sokkeang ),김양진 ( Ryangjin Kim ) 우리어문학회 2017 우리어문연구 Vol.58 No.-
본고는 `(어)하다` 구문과 `(-어)지다` 구문에 대한 `띄어쓰기 문제`와 `분리가능성 여부의 문제`를 중심으로 이 두 구문의 `접어성`에서의 공통점과 차이점을 논의하였다. 본고에서 논의된 내용의 핵심을 간략히 부연하면 다음과 같다. 첫째, `(-어)하다` 구문은 `(-어)지다` 구문에 비해 결합할 수 있는 선행용언은 제약적이지만 생산적이어서 `(-어)지다` 구문보다 더 많은 조건에서 보조사와의 결합가능성이 높아, 분리 가능성에서 `덜 제약적`이다. 둘째, `(-어)지다` 구문은 `(-어)하다` 구문에 비해 결합할 수 있는 선행용언의 범위가 넓지만 보조사에 의한 결합 조건에서 `더 제약적`이다. 다시 말하면, 접어성의 관점에서 볼 때, 한국어의 `(-어)하다` 구문은 일반적인 보조용언 구성에 비해 결합가능성이 높지만 분리가능성이 있어서 `덜 접어적`인 속성(즉, `중간적인 접어성`)을 지니며, `(-어)지다` 구문은 결합 조건이 긴밀하고 분리가능성이 매우 제약적이어서 `더 접어적`인 속성(즉 `더 강한 접어성`)을 가진 구문으로 이해된다는 것이다. This paper discusses commonalities and differences in the `cliticness` of these two following phrases, focusing on `problems of word spacing` and `problems of separation possibility` with respect to `-□ hada` phrase` and `-□ jida` phrase. The following is a summary of the key points discussed in this paper. First, `-□ hada` phrase is a sentence structure term that is more restrictive than `-□ jida` phrase, but is more productive than `-□ jida` phrase. It is likely to be less restrictive in separability. Second, The phrase `-□ jida` phrase has a wide range of predicates that it can be combined with. However, it is not as productive as the `-□ hada` phrase, and is `more restrictive` in the condition of attachment by auxiliary verb construction. In other words, from the viewpoint of clitic, the Korean `-□ hada` phrase` syntax is more likely to be a `clitic` (ie, `middle clitic`), And the `-□ jida` phrase statement is understood as a phrase with more clitic attributes (ie, stronger clitic`) because the combining condition is tight and the separability is very restrictive.
Men Ye Chong,Yew Joe Ho,Kasim Mansur 한국사회과학협의회 2015 Korean Social Science Journal Vol.42 No.1
This study investigates the relationship between teachers’ perceptions of the school principal’s leadership and their job satisfaction in Beaufort, a multiethnic semirural area in the interior of Sabah, Malaysia. Results of the research showed that there is a significant positive relationship between the perceived leadership of the school principal and job satisfaction among the teaching staff, and the relationship is not influenced by the demographic attributes of the study participants. The results accentuate the importance of developing the leadership of principals in public schools to enhance the commitment and job satisfaction of the teaching staff, which indirectly affects the overall performance of schools and students.
Men, X.M.,Deng, B.,Tao, X.,Qi, K.K.,Xu, Zi Wei Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.4
The goal of this work was to investigate the correlations between MyHC mRNA transcription and their corresponding protein expressions in porcine longissimus muscle (LM) during postnatal growth of pigs. Five DLY ($Duroc{\times}Landrace{\times}Yorkshire$) crossbred pigs were selected, slaughtered and sampled at postnatal 7, 30, 60, 120, and 180 days, respectively. Each muscle was subjected to quantity MyHCs protein contents through an indirect enzyme-linked immunosorbent assay (ELISA), to quantity myosin heavy-chains (MyHCs) mRNA abundances using real-time polymerase chain reaction. We calculated the proportion (%) of each MyHC to total of four MyHC for two levels, respectively. Moreover, the activities of several key energy metabolism enzymes were determined in LM. The result showed that mRNA transcription and protein expression of MyHC I, IIa, IIx and IIb in LM all presented some obvious changes with postnatal aging of pigs, especially at the early stage after birth, and their mRNA transcriptions were easy to be influenced than their protein expressions. The relative proportion of each MyHC mRNA was significantly positively related to that of its corresponding protein (p<0.01), and MyHC I mRNA proportion was positively correlated with creatine kinase (CK), succinate dehydrogenase (SDH), malate dehydrogenase (MDH) activities (p<0.05). These data suggested that MyHC mRNA transcription can be used to reflect MyHC expression, metabolism property and adaptive plasticity of porcine skeletal muscles, and MyHC mRNA composition could be a molecular index reflecting muscle fiber type characteristics.