• Journal of the Korean Applied Science and Technology
• /
• v.37 no.2
• /
• pp.183-191
• /
• 2020

This study monitored the rheological properties of jams manufactured using the black ginseng and black garlic. The conditions for mixing black jam were black ginseng (X₁, 30-54 g), black garlic (X₂, 75-135 g), pectin 4.5 g, apple paste 270 g, and fructo-oligosaccharide 360 g. The response surface analysis was performed with springiness, cohesiveness, chewiness, brittleness and gumminess. The R²s of the regression equation for springiness, cohesiveness, chewiness, brittleness and gumminess were recognized at a significant level of 5 to 10 %, with 0.8948, 0.9103, 0.9032, 0.9097, and 0.8561, respectively. The combination conditions of black ginseng and black garlic with the highest springiness of black jam were found to be 194.39% (springiness) with black ginseng 54.00 g and black garlic 105.83 g, while the conditions of black ginseng and black garlic mixing with the lowest springiness were found to be 164.11% with black ginseng 31.48 g and black garlic 119.43 g. The mixing conditions of black ginseng and black garlic with the highest cohesiveness of black jam and its consistency were 40.96% (cohesiveness) with black ginseng 48.85 g and black garlic 129.62 g, while black ginseng and black garlic combination conditions with the lowest cohesiveness were found to be 32.96% with black ginseng 50.06 g and black garlic 82.77 g. Black ginseng and black garlic mixing conditions, which have the highest chewiness of black jam, was 43.19 g (chewiness) from black ginseng 42.95 g and black garlic 106.83 g. Black ginseng and black garlic mixing conditions and their brittleness were found to be the highest in black ginseng 32.10 g and black garlic 88.04 g to 16,874 g. Black ginseng and black garlic mixing conditions and their brittleness were found to be 678 g from black ginseng 50.53 g and black garlic 83.91 g. Black ginseng and black garlic mixing conditions and their gumminess were 14.06 g with black ginseng content of 32.91 g and black garlic content of 124.60 g. By examining the relationship between black ginseng/black garlic ratio and the rheological property of black jam from above results, it is believed that black jam can be produced for anyone to enjoy using health function material.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.43 no.6
• /
• pp.623-628
• /
• 2010

The distribution of fluoroquinolones was investigated in the carp (Cyprinus carpio) and eel (Anguilla japonica) after an oral dose of 20 mg/kg body weight/day for 35 days. Blood samples were collected at 5 and 10 hours and 1, 2, 3, 5, 7, 9, 13, 20, 30, and 35 days after treatment. The fluoroquinolone concentrations were determined high- performance liquid chromatography with an ultraviolet detector. The recovery rates of fluoroquinolones in the fish samples ranged from 91.4-96.6, 91.2-96.5, and 90.4-98.6% for concentrations of 0.1, 0.5, and $1.0\;{\mu}g/g$, respectively. In the blood of carp, ciprofloxacin, enrofloxacin, norfloxacin, and sarafloxacin reached maximums level of 11.03, 9.37, 9.10, and $9.81\;{\mu}g/g$ 10 hours, 1 day, 10 hours, and 10 hours after treatment, respectively. In the eel blood, these reached maximum levels of 12.65, 11.18, 11.91, and $8.74\;{\mu}g/g$ all at 10 hours. Carp sample concentrations of ciprofloxacin, enrofloxacin, norfloxacin, and sarafloxacin were not measurable 20, 30, 20, and 20 days after treatment, respectively, in all experiments (

• Microbiology and Biotechnology Letters
• /
• v.20 no.5
• /
• pp.588-596
• /
• 1992

The fermentation characteristics of ethanol production by the use of immobilized Zymomonas mobilis KCTC 1534 cells were investigated in terms of formation factors such as substrate and product concentration. In batch fermentation, the maximum values of specific ethanol productivity, specific substrate uptake rate, ethanol yield, and glucose conversion rate were $29.14g/{\ell}{\cdot}h$, $60.24g/{\ell}{\cdot}h$, 0.48g/g, and 98.4%, respectively, with 17% glucose medium, and its ethanol productivity was $2.91g/{\ell}{\cdot}h$ in the case of 25 hour fermentation time. Repeated batch fermentation was possible for 30 days with 2.24-$2.94g/{\ell}{\cdot}h$ ethanol productivity. In semicontinuous fermentation, the maximum ethanol productivity was shown to be $15.7g/{\ell}{\cdot}h$ at $0.36h^{-1}$ effective dilution rate with 17% glucose concentration. In this case, ethanol yield coefficient and glucose conversion rate were 0.39 g/g, 64.7%, respectively.

• Proceedings of the Korean Magnestics Society Conference
• /
• 2008.12a
• /
• pp.91.1-91.1
• /
• 2008

• Kyungpook Mathematical Journal
• /
• v.51 no.1
• /
• pp.87-91
• /
• 2011

In this paper we obtain a Voronvskaya type theorem for modi ed Post-Widde operators.

• Journal of Veterinary Clinics
• /
• v.18 no.2
• /
• pp.93-97
• /
• 2001

병원성 Mycoplasma hyopneumoniae strain 91-3, 비병원성 M. hyopneumoniae 그리고 M. flocculare를 돼지의 기관지섬모상피에 투여시 세포내 $Ca^{2+}$ 농도 [$Ca^{2+]}$$_{i}$ 의 변화를 본 연구에서 조사하였다. M. hyopneumoniae strain 91-3 (300-$\mu\textrm{g}$ml)를 투여시 기관지 섬모상피내의 $Ca^{2+}$가 투여전과 비교시 투여 후 250$\pm$19 nM (net increase)증가하였다 (10회 반복 47 cells). 이와는 대조적으로 비병원성 M. hyopneumoniae (300 $\mu\textrm{g}$ml) (6회 반복 18 cells)와 M. flocculare (300 $\mu\textrm{g}$ml) (8회 반복 24 cells)는 세포내 $Ca^{2+}$의 농도를 증가시키지 못하였다. 위의 결과로 병원성 M. hyopneumoniae 91-3 균주는 비병원성 mycoplasma와는 다르게 돼지의 섬모상피에서 [$Ca^{2+}$]$_{i}$ 을 유도하였으며 이러한 특성은 mycoplasma 감염증 치료에 중요한 단서를 제공할 뿐만 아니라 새로운 치료법의 개발에 유용한 스크리닝 기술에 응용될 것으로 기대된다.

• Bulletin of the Korean Chemical Society
• /
• v.31 no.11
• /
• pp.3247-3251
• /
• 2010

Molecular structures of the various conformers for the four stereoisomers of tetra-t-butyl-tetra-O-methylsulfinylcalix[4]arene (1) were optimized using DFT BLYP and mPW1PW91/6-31G(d,p) (hybrid HF-DF) calculation methods. We have analyzed the total electronic and Gibbs free energies and normal vibrational frequencies of 16 different structures from four major conformations (cone (CONE), partial cone (PC), 1,2-alternate (1,2-A), 1,3-alternate (1,3-A)) of the four stereoisomers [1(rccc), 1(rcct), 1(rctt), 1(rtct)]. The mPW1PW91/6-31G(d,p) calculations suggested that the $1(rccc)_{CONE}$, $1(rcct)_{PC}$, $1(rctt)_{PC}$, and $1(rtct)_{1,3-A}$ were the most stable conformations of the respective stereoisomers. These outcomes are in accordance with the experimental structures obtained from X-ray crystallography. The electrostatic repulsion between the sulfinyl and methoxy groups is a primary factor for the relative stabilities of the four different conformations. The IR spectra of the most stable conformers [$1(rccc)_{CONE}$, $1(rcct)_{PC}$, $1(rctt)_{PC}$, $1(rtct)_{1,3-A}$] of each stereoisomer were compared to each other.

• Kyungpook Mathematical Journal
• /
• v.47 no.1
• /
• pp.91-103
• /
• 2007

In this paper we prove the Hyers-Ulam-Rassias stability by considering the cases that the approximate remainder ${\varphi}$ is defined by $f(x{\ast}y)+f(x{\ast}y^{-1})-2g(x)-2g(y)={\varphi}(x,y)$, $f(x{\ast}y)+g(x{\ast}y^{-1})-2h(x)-2k(y)={\varphi}(x,y)$, where (G, *) is a group, X is a real or complex Hausdorff topological vector space and f, g, h, k are functions from G into X.

• Journal of Food Hygiene and Safety
• /
• v.23 no.2
• /
• pp.163-168
• /
• 2008

This study investigated the anti-oxidative and anti-cancer activities by extracting of Yacon by fraction with organic solvents. The content of total phenol was the highest by 45.53% in ethyl acetate fraction and the results of electron donating abilities were 65.20% ($100\;{\mu}g/ml$), 91.81% ($500\;{\mu}g/ml$) and 95.06% ($1000\;{\mu}g/ml$) and those of nitrite scavenging abilities were 11.71% ($100\;{\mu}g/ml$), 36.81% ($500\;{\mu}g/ml$), 59.70% ($1000\;{\mu}g/ml$) in ethyl acetate fraction, which were higher concentration than the control group. Xanthine oxidase inhibitory activities were 23.74% ($100\;{\mu}g/ml$) and 43.41% ($500\;{\mu}g/ml$) in low concentration, which showed higher activities than the control group. After measuring the growth inhibitory activities for cancer cells, it has been found that hexane fraction had the highest growth inhibitory activities by 23.75% ($10\;{\mu}g/ml$), 34.67% ($50\;{\mu}g/ml$), 54.21% ($100\;{\mu}g/ml$) for SNU-1. Meanwhile, hexane fraction demonstrated high growth inhibitory activities by 41.38% ($10\;{\mu}g/ml$), 50.53% ($50\;{\mu}g/ml$), 60.91% ($100\;{\mu}g/ml$) and butanol fraction had 17.05% ($10\;{\mu}g/ml$), 43.87% ($50\;{\mu}g/ml$), 62.99% ($100\;{\mu}g/ml$) for HeLa. Therefore, it has been believed that there were peculiar properties of anti-oxidative and anti-cancer activities depending on each fraction. Furthermore, it has been expected that further studies on the development of functional food and concrete components depending on the components of each fraction to be conducted.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.22 no.1
• /
• pp.127-134
• /
• 2022

A modified folded monopole slot antenna for 3G WCDMA (1.91 ~ 2.17 GHz), 4G LTE (2.17 ~ 2.67 GHz), 3.5 GHz 5G (3.42 ~ 3.7 GHz) and Wi-Fi dual band (2.4 ~ 2.484 GHz / 5.15 ~ 5.825 GHz) was proposed for the first time. The proposed antenna is designed and fabricated on a FR-4 substrate with dielectric constant 4.3, thickness of 1.6 mm, and size of 35 × 60 mm². The measured impedance bandwidth of the proposed antenna is 2910 MHz(1.84 ~ 4.75 GHz) and 930 MHz(5.11 ~ 6.04 GHz), antenna gain in each frequency band is from 1.811 to 3.450 dBi. In particular, it was possible to obtain a commercially suitable omni-directional radiation pattern in all frequency bands of interest.