• Advances in Energy Research
• /
• v.4 no.3
• /
• pp.189-202
• /
• 2016

This work emphasized optimum production of biodiesel using non-edible Prunus armeniaca (Bitter Apricot) oil via transesterification collected from the high altitude areas of Himachal Pradesh, India. In this study the author produced biodiesel through the process of transesterification by using an alkali catalyst with alcohol (methanol and ethanol), under the varying molar ratio (1:6, 1:9, 1:12), variable catalyst percentage (1% and 2%) and temperature ($70^{\circ}C$, $75^{\circ}C$, $80^{\circ}C$, $85^{\circ}C$). Furthermore, a few strong base catalysts were used that includes sodium hydroxide, potassium hydroxide, sodium metal and freshly prepared sodium methoxide. After screening the catalyst, response surface methodology (RSM) in connection with the central composite design (CCD) was used to statistically evaluate and optimize the biodiesel production operation using NaOH as catalyst. It was found that the production of biodiesel achieved an optimum level biodiesel yield with 97.30% FAME conversion under the following reaction conditions: 1) Methanol/oil molar ratio: 1:6, 2) Reaction time: 3h, 3) Catalyst amount: NaOH 2 wt. %, and 4) Reaction temperature: $85^{\circ}C$. The experimental results showed that the optimum production and conversion of biodiesel through the process of transesterification could be achieved under an optimal set of reaction conditions. The biodiesel obtained showed appropriate fuel properties as specified in ASTM, BIS and En- standards.

• Cross-Cultural Studies
• /
• v.50
• /
• pp.283-311
• /
• 2018

The Russian poet A. C. Pushkin left more than a hundred self-portraits in his lifetime. These self-portraits are the subject of a special research project. Pushkin liked to sketch himself disguised in various shapes in his manuscripts. Besides Pushkin, many authors have portrayed themselves, but in terms of their quantity and fame, it is difficult to find self-portraits that transcended those which are as detailed and revealing as that of Pushkin's. Focusing on this point, this paper first examines the position of the poet's self-portraits in the context of the tradition of the self-portrait, as a painting genre full of romanticism as manifested and revealed in the 19th century. Subsequently, this article explains the meaning of the Pushkin's typical self-portraits in profile, which were mostly drawn in his manuscripts. Finally, in order to explore the philosophical implications contained in this poet's self-portraits, this paper attempts to read poet's self-portrait in comparison with Rembrandt's self-portrait, and Montaigne's Essais as well for a comprehensive comparison of the three entities.

• Journal of the Korean Applied Science and Technology
• /
• v.35 no.4
• /
• pp.1048-1056
• /
• 2018

Non-edible oil sources (i.e., Palm Acid Oil, waste animal fat) usually contain relatively high amount of free fatty acids (FFA) that make them inadequate for direct base catalyzed transesterification reaction. Enzymatic biodiesel synthesis can solve several problems posed by the alkaline-catalyzed transesterification, and has certain advantages over the chemical catalysis of transesterification, as it is less energy intensive, allows easy recovery of glycerol and the transesterification of glycerides with high free fatty acid contents. In this study, we synthesized biodiesel through enzymatic catalyzed process using high free fatty acid containing waste oil in biodiesel reactor (1 ton/day) and optimized the biodiesel production processes.

• Applied Chemistry for Engineering
• /
• v.22 no.1
• /
• pp.72-76
• /
• 2011

In this study, we investigated the characteristics of biodiesel using the waste coffee oil which was extracted by waste coffee grounds. We tried to deduce the optimum conditions by defining the operating variables, such as mole ratio between methanol and coffee oil (6~18) and the reaction temperature ($45{\sim}60^{\circ}C$) in the biodiesel production processes. The performance was evaluated in terms of yields, contents of fatty acid methyl ester (FAME), viscosities, and heating values. The optimum reaction temperature was $55^{\circ}C$. Also, the best biodiesel was produced at the mole ratio between methanol and coffee oil of 12. The highest heating value of the produced biodiesel made from coffee oil was 39.0~39.4 MJ/kg, which satisfies the general standard for the biodiesel energy density, 39.3~39.8 MJ/kg.

• Journal of English Language & Literature
• /
• v.56 no.2
• /
• pp.329-356
• /
• 2010

Coleridge's fame as a poet rests on the achievement of the mystery poems, "The Anceint Mariner," "Kubla Khan," and "Christabel." Coleridge's achievement in "Christabel" goes far beyond what previous critics have imagined. Coleridge is one of a handful of great writers who are included as representatives of androgyny. Throughout his life, Coleridge was accustomed to point out feminine qualities within himself. "Christabel" exemplifies the kind of writing contemporary feminist theories call l'écriture féminine. L'écriture féminine is not necessarily the creation of women but may rather be the works of those who refuse to identify with the father and the laws of paternal discourse. "Christabel" becomes Coleridge's most daring symbolic story. "Christabel" appears in its full significance as a vehicle for some profound insights into the dynamics of relationships between men and women, fathers and daughters. Through her deformity, Geraldine is actually the casualty of her father's hatred of women, and is the embodiment of all its anti-virtual aspects. The poem shows no bitterness against women, only compassion and remorse. Coleridge is sympathetically presenting Christabel's suffering as a woman at the hands of an overmastering man. Also, "Christabel" demonstrates woman power as well. In fact, the one person whose tales have any real effect within this narrative is the ambiguous Geraldine. Geraldine excels at story-telling, at making words act for her. Perhaps, despite the appearance of the surface, in which men hold all the cards, it is in fact women, or the feminine, so necessary to procreation and creativity, who hold sway here. This apparent dominion of the feminine derives at least partly from Coleridge's use of the conventions of that feminine genre, the Gothic romance. L'écriture féminine is a concept defined by its divergence from a dominant cultural norm. One may speculate that the fragmentary state of "Christabel" and "Kubla Khan" is in fact congruent with this mode of writing. If these poems imply a theoretical écriture féminine, they are by definition "incomplete," for completeness is a standard of patriarchal language and culture. More perplexing even than the other "mystery poems," "Christabel" is the true fragment of the three.

• SUVANNABHUMI
• /
• v.6 no.1
• /
• pp.27-65
• /
• 2014

Flourishing in the Central Dry Zone of Burma during a period from the mid-eleventh to the late-thirteenth century A.D., the historical kingdom of Pagan was one of the major Buddhist centers in Southeast Asia. The significance of Pagan as an important pilgrimage site of the region, where numerous relics of the Buddha were enshrined, had been maintained until long after the fall of its civilization. It is evident that the artistic influences of Pagan, particularly in the architectural and decorative domains, had been transmitted to various other Buddhist civilizations in the area. This study provides a detailed analysis on the relationships between the mural tradition of Pagan and those of its neighboring civilizations in Thailand-of the Ayutthayā, Lānnā and Sukhothai schools-dating from after the Pagan Period in the fourteenth century to the sixteenth century. Surprisingly, as the analysis of this study has suggested, such relationships seemed to be trivial, more on a minor stylistic basis than on substantial ideological and iconographic grounds. They suggest that transmission of the complex idea and superb craftsmanship of the mural tradition would not have been maintained adequately at Pagan after its civilization, probably due to the lack of royal patronage. It would have been extremely difficult for foreign pilgrims who visited Pagan after its dynastic period to appreciate the surviving murals of this lost tradition in terms of their complex programs and associated symbolism. Also, there had been a new center of the Sinhalese Buddhism firmly established in the Martaban area of lower Burma since the mid-fourteenth century that outcompeted Pagan in terms of supplying the new Buddhist ideas and tradition. Its fame spread wide and far among the Buddhist communities of Southeast Asia. Later, these Buddhist communities also established direct contact with Sri Lanka. The Sukhothai murals and the Ayutthayā murals in the crypt of Wat Rātchaburana, dating from the fourteenth/fifteenth century, show obvious Sri Lankan influence in terms of artistic style and Buddhist iconography. They could be a product of these new religious movements, truly active in Southeast Asia during that time.

• Korean Journal of Poultry Science
• /
• v.51 no.1
• /
• pp.21-26
• /
• 2024

This study was conducted to investigate the composition of the fatty acids in the breast meat of Red-brown Korean native chickens (KNC-R). This study used a total sample of three hundred eighty-two KNC-R (males: 190, females: 192). We used the fatty acid methyl ester (FAME) method to extract the fatty acids. A 2-way ANOVA of the R program was used to assess the effects of batch and sex on each fatty acid trait. Analysis of the fatty acid in the sampled population showed that the predominant fatty acid was oleic acid (C18:1; 28.252%) which is monounsaturated fatty acid (MUFA), followed by palmitic acid (C16:0; 20.895%), saturated fatty acid (SFA), and two omega-6 polyunsaturated fatty acid (PUFAs): linoleic (C18:2; 15.975%), and arachidonic (C20:4; 10.541%). Indices used to evaluate the nutritional quality of fat in the diet: ratio between PUFAs and SFAs (P/S), thrombogenicity index (TI), and atherogenicity index (AI) were calculated and were 0.959, 0.814, and 0.355, respectively. Currently, meat consumers need healthier fatty acids. Therefore, information on the content of fatty acid in chicken meat is very important for meat consumers in choosing the type of the meat to be consumed.

• The Journal of the Acoustical Society of Korea
• /
• v.28 no.1
• /
• pp.44-50
• /
• 2009

While American acoustics had been lagged behind European one in the nineteenth century, Alfred Mayer greatly contributed to enhance American experimental acoustics. He inherited experimental skills in collaboration with Koenig in Paris, and got chances to obtain research ability from leading researchers such as Rayleigh during his visit to England. His accomplishments, which brought him fame in Europe, included the creation of the acoustic pyrometer which measured the high temperature by means of the thermal change of the sound velocity, the discovery of mosquito's hearing by selective resonance, the formalization of the duration of the residual sensation of sound, the invention of the topophone which searched for the direction of the sound source, the construction of the apparatus for visualizing the frequency of sound and so on. He not only added new research results to Europe's acoustics but applied acoustics to physical education to help produce the next generation of American acousticians.

• Korea Journal of Hospital Management
• /
• v.8 no.3
• /
• pp.32-48
• /
• 2003

Korea is to open its medical markets to foreign hospitals starting in the year 2006 regardless of our will(DDA, Doha Development Agenda). To accurately understand the characteristics of Korean medical users, their detailed and various needs, their attitudes toward the opening of Korean medical markets, and factors affecting these users in choosing foreign medical service providers would be first step needs to be taken by the Korean medical facilities that need to survive and develope through the fiercely competitive era coming with the opening of Korean medical markets to foreign medical service providers and would be very important in hospital management. The subjects of this study were 500 patients randomly selected from the outpatients who visited one of university hospitals in Seoul on the 14th-16th days of April 2003, and conducted a self-completion questionnaire. The answers of 463 respondents among the selected patients(93% of a responding rate)were analyzed through the Excel and statistics programs. The attitudes on the opening of the medical markets were shown in agreement 56.5%(247 persons), disagreement 6.9%(30 persons), and no idea 36.6%(160 persons). In consideration of only the answers as agreement and disagreement exclusive of the answer as no idea, 89.2% of the respondents agreed to the opening of the medical markets while 10.8% objected to the opening. The approval rate was higher with the higher education and income levels. Moreover, The approval rate for the opening of the medical markets was relatively high regardless of the satisfaction in the medical service, and the most important reason of the agreement was the guarantee of the patients(national)option. The main reason of the disagreement was high medical fee(50.5%), and the other reasons showing low rates were outflow of the domestic fund to the foreign countries(13.6%), damage of medical influences on the public(11.4%), lack of competition of the domestic medical industry(9.1%)and so on. As for the factors of selecting the foreign hospitals in the opening of the medical markets, the patients considered the authority(competency)of doctors firstly, and the other principal factors were worldwide fame and reliance, specific explanation of doctors, modernized medical instruments, convenient consultation procedure, etc. The patients agreed to the opening of the medical markets at a high rate regardless of the satisfaction in the medical service, and the most principal reason of the agreement was the guarantee of the patients(national)option for the medical care. Connected with the factors to select the hospitals, the approval reasons for the opening of the medical markets were the authority(competency)of the doctors as the first one, and then fame and tradition, reliance, overall diagnosis and modernized medical instruments, doctors specific explanation, and so on. However, these factors are actually associated with the Quality of the medical care, and consequently the approval reasons for the opening of the medical markets are connected with the security of the medical care. Accordingly, the guarantee of the patients(national)option answered as the main reason of the agreement can be also understood as the awareness of the right to have a variety of options for the security of the medical quality.

• Korean Chemical Engineering Research
• /
• v.47 no.6
• /
• pp.762-767
• /
• 2009

In this study, the feasibility of using vegetable oil extracted from tropical crop seed as a biodiesel feedstock was investigated by producing biodiesel and analysing the quality parameters as a transport fuel. In order to produce biodiesel efficiently, two step reaction process(pre-treatment and transesterificaion) was required because the tropical crop oil have a high content of free fatty acids. To determine the suitable acid catalyst for the pre-esterification, three kinds of acid catalysts were tested and sulfuric acid was identified as the best catalyst. After constructing the experimental matrix based on RSM and analysing the statistical data, the optimal pre-treatment conditions were determined to be 26.7% of methanol and 0.982% of sulfuric acid. Trans-esterification experiments of the pre-esterified oil based on RSM were carried out, then discovered 1.24% of KOH catalyst and 22.76% of methanol as the optimal trans-esterification conditions. However, the quantity of KOH was higher than the previously established KOH concentration of our team. So, we carried out supplemental experiment to determine the quantity of catalyst and methanol. As a result, the optimal transesterification conditions were determined to be 0.8% of KOH and 16.13% of methanol. After trans-esterification of tropical crop oil, the produced biodiesel could meet the major quality standard specifications; 100.8% of FAME, 0.45 mgKOH/g of acid value, 0.00% of water, 0.04% of total glycerol, $4.041mm^2/s$ of kinematic viscosity(at $40^{\circ}C$).