• 한국식품저장유통학회지
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• 제23권7호
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• pp.1065-1073
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• 2016

본 연구는 소비자가 원하는 후지사과의 품질 등급을 위한 기초 데이터를 제공하기 위하여 시장에서 판매되고 있는 상품 가격에 따른 후지 사과의 품질 특성 및 관능특성을 조사하였다. 시장 가격별(4그룹, 50개들이)로 후지 사과의 무게와 부피는 시료 간 유의적인 차이가 없었으며, pH와 적정산도는 A 그룹이 가장 낮은 3.99, 0.32%였고, 가용성 고형분 함량과 총 유리당 함량의 경우 가격이 비교적 높은 A 그룹과 B 그룹이 저가의 C 그룹과 D 그룹보다 높았다. 또 유기산은 A 그룹의 시료가 가장 높은 함량인 386.29 mg%, B, C, D 그룹은 320.09~359.23 mg%였다. 한편 훈련된 전문패널에 의한 묘사 분석 결과 사과 외관의 붉은색의 균일성과 사과 껍질의 윤기의 경우 A 그룹 가장 높게 평가하였다. 과육의 노란색 정도, 사과향, 단맛, 다즙성, 아삭함의 관능특성에서 A 그룹과 B 그룹이 C와 D 그룹보다 높은 점수로 평가하였다. 또 동일한 시료군의 후지 사과를 소비자 검사를 실시한 결과 전반적으로 묘사 분석 결과의 비슷하게 평가하였고, 전체적인 기호도는 A 그룹과 B 그룹이 각각 7.02과 6.92로 평가하였고, C 그룹과 D 그룹은 각각 3.89와 2.49로 평가하였다. 후지사과의 품질 특성과 관능적 품질 특성 상관관계 분석 결과 중 전체적인 기호도는 적정산도(r=0.58), 가용성 고형분(r=0.89), 당산비(r=0.42), 유리당(r=0.36) 및 유기산(r=0.38)과 양의 상관성을 나타내었다. 물리화학적 품질 특성의 주성분 분석 결과 총설명력은 66.01%이었고, 주성분 F1은 pH, 적정산도, 가용성 고형분, 유리당 및 유기산이었고, 주성분 F2는 사과의 무게와 크기로 물성 특성이었다. 또 관능적 품질 특성의 주성분 분석을 실시한 결과, 전문패널에 의한 주성분 분석 결과(a)는 총설명력은 56.55%였고, 소비자 검사 결과에 의한 주성분 분석 결과(b)는 총설명력은 55.84%로 전문패널원에 의한 주성분 분석 결과와 유사한 설명력을 보였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.1053-1054
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• 2013

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2003년도 somma/kms meeting
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• pp.133-133
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• 2003

• Bulletin of the Korean Chemical Society
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• 제31권1호
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• pp.75-81
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• 2010

The reaction of N,N-diethyl carbamates of 1H-[1,2,3]triazolo[4,5-b]pyridin-1-ol (4-HOAt) 7, 3H-[1,2,3]triazolo[4,5-b]pyridin-3-ol (7-HOAt) 8, 1H-benzo[d][1,2,3]triazol-1-ol (HOBt) 9, 6-chloro-1H-benzo[d][1,2,3]triazol-1-ol (Cl-HOBt) 10, 6-(trifluoromethyl)-1H-benzo[d][1,2,3]triazol-1-ol ($CF_3$-HOBt) 11, and 6-nitro-1H-benzo[d][1,2,3]triazol-1-ol ($NO_2$-HOBt) 12 with morpholine and piperidine in $CH_3CN$ underwent acyl nucleophilic substitution to give the corresponding carboxamide derivatives. The reactants and products were identified by elemental analysis, IR and NMR. We measured the kinetics of these reactions spectrophotometrically in $CH_3CN$ at a range of temperatures. The rates of morpholinolysis and piperidinolysis were found to fit the Hammett equation and correlated with $\sigma$-Hammett values. The values were 1.44 - 1.21 for morpholinolysis and 1.95 - 1.72 for piperidinolysis depending on the temperature. The $Br{\phi}$nsted-type plot was linear with a $\beta_lg = -0.49 \pm 0.02$ and $-0.67 \pm 0.03$. The kinetic data and structure-reactivity relationships indicate that the reaction of 9-12 with amines proceeds by a concerted mechanism. The deviation from linearity of the correlation ${\Delta}H^#$ vs. ${\Delta}S^#$ and plot of $logk_{pip}$ vs. $logk_{morph}$ and $Br{\phi}$nsted-type correlation indicate that the reactions of amines with carbamates 7 and 8 is attributed to the electronic nature of their leaving groups.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권7호
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• pp.2449-2463
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• 2014

Hierarchical B-frame coding was introduced into H.264/SVC to provide temporal scalability and improve coding performance. A content analysis-based adaptive group of picture structure (AGS) can further improve the coding efficiency, but damages the inter-frame correlation and temporal scalability of hierarchical B-frame to different degrees. In this paper, we propose a group of pictures (GOP) adaptation coding method based on the positions of video cuts. First, the cut positions are accurately detected by the combination of motion coherence (MC) and mutual information (MI); then the GOP is adaptively and proportionately set by the analysis of MC in one scene. In addition, we propose a binary tree algorithm to achieve the temporal scalability of any size of GOP. The results for test sequences and real videos show that the proposed method reduces the bit rate by up to about 15%, achieves a performance gain of about 0.28-1.67 dB over a fixed GOP, and has the advantages of better transmission resilience and video summaries.

• 한국농공학회논문집
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• 제46권4호
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• pp.39-46
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• 2004

This experiment was carried out to study on the effect of surface coating on thermal insulation of farm structures to improve thermal resistance and reflective effect of solar radiation. Nine different types of experimental specimen were compared in the temperature variations of inside and outside; A, B, C, D. E and F types are box container and G, H and I types are drum container. The size of these containers is $1,500{\times}2,000{\times}2,500$ mm and ${\varphi}$ $280{\times}330$ mm, respectively. Specimen of 3-type box(A, B, C) is galvanized steel sheet of thickness 0.45 mm. D, E and F types are sandwich panel of the thickness 50 mm inserted with urethane, glass wool and polystyrene form, respectively. G, H and I types are paint pot using in general. The surface of A. D, E, F and I types didn't any treatment, B, C and G types were treated with thermal insulation coating on the outside surface(B, G) or the inside and outside surface(C). And H type was treated with water paint coating on the only outside surface. In general, the experimental results showed the following tendencies; In case of A, B and C types. it was found that the thermal insulation effect of types coated with thermal insulation coating was improved remarkably than that of no treatment. And the thermal insulation effect between steel sheet and sandwich panel type was nearly similar There was not a significant difference of thermal insulation effect between thermal insulation coating and water paint coating. In time of drum container filled with rough rice, The difference of heat transfer tendency and temperature variation among surface treatments was nearly similar that of box types of galvanized steel sheet. And there was time lag about 6 hours between the temperature of middle part of rice and that of inside or outside surface.

• Preventive Nutrition and Food Science
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• 제21권2호
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• pp.124-131
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• 2016

Among 116 bacterial strains isolated from Korean fermented foods, one strain (SS-76) was selected for producing new oligosaccharides in a basal medium containing maltose as the sole source of carbon. Upon morphological characterization using scanning electron microscopy, the cells of strain SS-76 appeared rod-shaped; subsequent 16S rRNA gene sequence analysis revealed that strain SS-76 was phylogenetically close to Bacillus subtilis. The main oligosaccharide fraction B extracted from the culture supernatant of B. subtilis SS-76 was purified by high performance liquid chromatography. Subsequent structural analysis revealed that this oligosaccharide consisted only of glucose, and methylation analysis indicated similar proportions of glucopyranosides in the 6-linkage, 4-linkage, and non-reducing terminal positions. Matrix-assisted laser-induced/ionization time-of-flight/mass spectrometry and electrospray ionization-based liquid chromatography-mass spectrometry/mass spectrometry analyses suggested that this oligosaccharide consisted of a trisaccharide unit with 1,6- and 1,4-glycosidic linkages. The anomeric signals in the $^1H$-nuclear magnetic resonance spectrum corresponded to ${\alpha}$-anomeric configurations, and the trisaccharide was finally identified as panose (${\alpha}$-D-glucopyranosyl-1,6-${\alpha}$-D-glucopyranosyl-1,4-D-glucose). These results suggest that B. subtilis SS-76 converts maltose into panose; strain SS-76 may thus find industrial application in the production of panose.

• 통합자연과학논문집
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• 제8권1호
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• pp.30-39
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• 2015

The crystal structure of the potential active 2-amino-4-(4-hydroxy-3-methoxyphenyl)-7, 9-dimethyl-5-oxo-4, 5, 6, 7-tetrahydropyrano [2, 3-d] pyrazolo [3, 4-b] pyridine-3-carbonitrile ($C_{21}H_{22}N_5O_6S$) has been determined from single crystal X-ray diffraction data. In the title compound crystallizes in the monoclinic space group P-1 with unit cell dimension a=8.1201(9)${\AA}$, b=12.2684(4)${\AA}$ and c=12.387(2)${\AA}$ [${\alpha}=69.573^{\circ}$, ${\beta}=12.168^{\circ}$ and ${\gamma}=76.060^{\circ}$]. In the structure the pyrazole, pyridine and pyran are almost coplanar each other. The crystal packing is stabilized by intermolecular C-H...O and N-H... O hydrogen bond interaction.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 II
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• pp.1215-1220
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• 2001

Wind tunnel test of a new pantograph, that is developed through the KHST project, was performed in RTRI wind tunnel test center of Japan end of last June. This paper indtroduces the measurement results and analysis of noise measurement part that is achieved during the wind tunnel test. The maximum measured sound pressure level at 5m shows 102.3dB(A) at 350km/h and it leads to 88.3dB(A) of predicted sound pressure at 25m that satisfy 91dB(A) of evaluation criteria. Major noise sources of the pantograph was identified as a link between upper and lower arm, panhead contact strips and shunt wires.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 A
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• pp.3-5
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• 1995

For a linear induction motor(LIM), the constants of each phase are different due to the structure. In this paper, a vector control analysis method of a LIM taking into consideration its asymmetrical constants are proposed. And, in order to prove the propriety of proposed vector control method and to analyze the dynamic characteristics of LIM's vector control, FEM taking into account of movement and using stator tapped winding is used in the analysis region. So, It is confirmed that the proposed asymetrical constants vector control theory and simulation method of mixing with FEM is appropriate to dynamic characteristics analysis of LIM.