• 한국해양학회지
• /
• v.30 no.5
• /
• pp.436-441
• /
• 1995

Final biomass yields (peak optical density) and growth rates (divisions/day) of seven clones of Skeletonema costatum from Korean coastal waters were measured to understand their intraspecific variations in the light intensity niche component under 25$^{\circ}C$ condition. Daily growth rates of 6 out of 7 S. costatum clones were maximum at 6000 lux while that of YS4, a neritic clone, was maximum at 9000 lux. The final biomass yields of 4 out of the 7 s. costatum clones were maximum at the lowest light intensity of 2000 lux. Minimum final biomass yields were found at 9000 lux in all the S. costatum clones other than an estuarine clone, HDC9. The intraspecific variations of the mean growth rate and mean final biomass yield under each of the three different light intensities in terms of the coefficient of variation were not greater than 10% in any of the 7 S. costatum clones.

• Journal of the Korean Applied Science and Technology
• /
• v.31 no.2
• /
• pp.305-312
• /
• 2014

The following study is the result of herbal teas puffed at different temperatures between $140{\sim}220^{\circ}C$. There was change of single breadth that some carbonization occurs according to rise of processing temperature and crude ash content rises relatively, and crude protein and crude fat content had hardly changed and moisture content decreased. The solid elution rate of the herbal teas appeared by 0.18~0.27% (w/w), it increased as puffing temperature rises. The reason for the increase in solid elution rates is due to the breakage of cross bridges between the raw materials in the herbal tea which are carbohydrates, proteins, lipids and etc. after treatments of physical changes rather than chemical ones. Benzopyrene content happened difference in B(${\alpha}$)P content according to processing temperature, raw material by 0.18~0.24 ppbs.

• Journal of Haehwa Medicine
• /
• v.26 no.1
• /
• pp.49-57
• /
• 2017

Objectives : The purpose of this study was to investigate the efficacy of inhalation therapy using Zizyphus jujuba var. spinosa blended oil and spa therapy on stress in adults. Methods : The study design was a double blind, randomized, single center clinical trial. A total of 30 volunteers who were highly stressed and were over 9 points on POMS(profile of mood states) participated in this study. Inhalation therapy using Zizyphus jujuba var. spinosa blended oil and spa therapy were applicate for the experimental group and Jojoba oil inhalation and spa therapy was given for the control group. During the 2 weeks, the participants were treated about inhalation and spa therapy twice a week. The treatment sequence is spa therapy after inhalation therapy. Result : The improvement of stress was evaluated by POMS, HRV(Heart Rate Variability), EEG(Electroencephalography), PSQI(Pittsburgh Sleep Quality Index), salivary cortisol. After treatment, POMS was significantly decreased between the experimental group and the control group. In other measurement(HRV, EEG, PSQI, salivary cortisol) except POMS, there were not significant. Overall, however, they showed a tendency to alleviate stress in the experimental group. Conclusions : We suggest that inhalation therapy using Zizyphus jujuba var. spinosa blended oil and spa therapy might be effective on stress.

• Journal of Radiation Protection and Research
• /
• v.26 no.1
• /
• pp.27-33
• /
• 2001

This study was performed to determine the effect of several herbs on radiation-induced apoptosis in jejunal crypt cells. Longyanrou(Euphoris longana), Suanzaoren(Zizyphus vulgaris), Yuanzhi(Polygala tenuifolia), Rensan(Panax ginseng), Fuling(Poria cocos), Muxiang (Saussurea lappa), Chuanxiong(Cnidium officinale), Baishaoyao(Paeonia lactifolia), Shengma (Cimicifuga heracleifolia), Chaihu (Bupleurum falcatum) and Dongchongxiacao ( Paecilomyces japonica) reduced the frequency of radiation-induced apoptosis(p<0.05). Although the mechanisms of this effect remain to be elucidated, these results indicated that Longyanrou, Suanzaoren, Yuanzhi, Rensan, Fuling, Muxiang, Chuanxiong, Baishaoyao, Shengma, Chaihu and Dongchongxiacao might be useful inhibitors of apoptosis, especially since these are relative nontoxic natural products.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2016.10a
• /
• pp.307-309
• /
• 2016

This paper present about the system for sensing and controlling a wireless power transfer system using bluetooth protocol in robot, healthcare, smart-grid, and autonomous car. Recently a variety of applications using the Internet of Things (Internet of Things) and machine to machine (Machine to Machine) have been raised in many industries. To do this, it requires the fusion technology which is constituted with control, computing and networking. Embedded system is centered existing control system and Cyber Physical System(CPS) is the systems which was converged of a computing technologies using a wired or wireless network. CPS was adopted in the future government-led technology in the United States and Europe and is being pursued in cooperation with institutes, industries, and academia. In this paper, we implement and describe a technique for controlling the system for transmitting power wirelessly by sensing method using the matching of CPS technology concepts.

• Food Science and Preservation
• /
• v.13 no.2
• /
• pp.186-191
• /
• 2006

Prunus mume is extensively cultivated as a fruit and medicinal plant in Korea. Recently, prunus mume has a pressing problem with an increase of prunus mume cultivation area in southern part in Korea. Chemical properties of prunus mume flower to determine the optimum processing varieties for tea were investigated. Three kinds of samples treated with fresh, freeze dry and shade dry were used. The content of moisture, crude ash, crude protein, crude fiber, crude fat and nitrogen free extract of prunus mume flower varieties were to $82{\sim}85%,\;0.2{\sim}0.6%,\;2.5{\sim}3.1%,\;2.5{\sim}3.1%,\;0.6{\sim}0.8%\;and\;10{\sim}11%$ respectively. The main component of free sugars in prunus mume flower was glucose and those of organic acids were citric and malic acids. 17 kinds of amino acids were determined from prunus mume flower. The total amino acid contents of Cheongchuk, Baeagaha and Goseong were 760.47 mg%, 624.01 mg% and 807.41 mg%, respectively. Aspartic acid, glutamic acid and lysine were the major component in 3 cultivars. The content of K was much higher than Ca, Mg, Na, fe and Zn. The major fatty acids of prunus mume flower were myristic acid, palmitoleic acid me oleic acid. As a result of analysis, there were no significant differences among the three cultivars of prunus mume flower and drying method.

• Journal of Life Science
• /
• v.31 no.9
• /
• pp.840-848
• /
• 2021

This study was conducted to estimate annual trends and the environmental effects in the racing records of Jeju horses. The Korean Racing Authority (KRA) collected 48,645 observations for 2,167 Jeju horses from 2002 to 2019. Racing records were preprocessed to eliminate errors that occur during the data collection. Racing times were adjusted for comparison between race distances. A stepwise Akaike information criterion (AIC) variable selection method was applied to select appropriate environment variables affecting racing records. The annual improvement of the race time was -0.242 seconds. The model with the lowest AIC value was established when variables were selected in the following order: year, budam classification, jockey ranking, trainer ranking, track condition, weather, age, and gender. The most suitable model was constructed when the jockey ranking and age variables were considered as random effects. Our findings have potential for application as basic data when building models for evaluating genetic abilities of Jeju horses.

• Research in Plant Disease
• /
• v.18 no.4
• /
• pp.391-395
• /
• 2012

To investigate the occurrence of viruses in peach, leaf samples were collected from peach trees in commercial orchard of six areas in Korea. Reverse transcription polymerase chain reaction (RT-PCR) was used to identify the presence of the following stone fruit viruses: Apple chlorotic leaf spot virus (ACLSV), Apple mosaic virus (ApMV), Prune dwarf virus (PDV), Prunus necrotic ringspot virus (PNRSV) and Plum pox virus (PPV). About 65.0% of the 515 samples were infected with ACLSV and PNRSV. Virus-like symptoms showing mosaic on leaves was observed in ACLSV infected peach trees. However, PNRSV infected peach trees showed no symptoms. These viral DNAs by sequence analysis were confirmed 4 ACLSV isolates and 3 PNRSV isolates. The Korean peach isolates of ACLSV and PNRSV showed 70-99% and 88-99% amino acid sequence identities, respectively, with those reported previously and their amino acid sequence identities with each other were approximately 95% and 88%, respectively. Phylogenetic analysis indicated that the Korean ACLSV isolates belong to the A group of ACLSV. The Korean PNRSV isolates reported in this study were grouped into I (PV32), II (PV96) and III (PE5) groups.

• Food Science and Preservation
• /
• v.23 no.6
• /
• pp.866-875
• /
• 2016

In this study, we investigated the variation in free sugars, amino acids, antioxidant activity, and anti-inflammatory activity of Solanum nigrum Linne based on harvest time. Major amino acids identified by HPLC analysis were proline, histidine, and serine. The highest content of total amino acids were found in S. nigrum aerial parts and roots harvested on July 10th and August 10th. Four kinds of free sugars (fructose, glucose, sucrose, maltose) were detected in S. nigrum, and the free sugar content varied significantly with harvest time. The fructose content of S. nigrum decreased with as harvest time increased. The total polyphenol content of S. nigrum was highest in those harvested on August 30th. The antioxidant activity of ethanol extract from S. nigrum collected at different harvest times were measured by DPPH and ABTS radical scavenging assays. The anti-inflammatory activity of these extracts were assayed via nitric oxide suppression in C6 glioma cells with a lipopolysaccharide (LPS)-induced inflammatory response. The anti-inflammatory activity and antioxidant effects were the highest in the extract from S. nigrum collected on August 30th. Good correlations were observed between antioxidant and anti-inflammatory activities in ethanol extract of S. nigrum roots harvested on August 30th.

• Korean Journal of Poultry Science
• /
• v.50 no.3
• /
• pp.161-169
• /
• 2023

The present study aimed to investigate the effect of Allium hookeri (AH) root on growth performance, serum antioxidant enzyme activity, cecal short-chain fatty acid profiles, and tight junction-related gene expression of broiler chickens. On day 10, 96 birds were allocated to one of two dietary treatments with 6 replicate cages, and 8 birds per cage in a randomized complete block design. The experimental diets consisted of a corn-soybean meal-based control diet and a diet supplemented with 0.3% AH root powder at the expense of the corn in the control diet. The experimental diets were formulated to meet or exceed the nutrients requirements of broilers recommended by Aviagen for each phase (from day 10 to 21 and from day 21 to 28). On day 28, a bird representing the median body weight in each cage was selected, and then blood, cecal digesta, and jejunum tissue samples were collected. No significant differences were observed in body weight gain and feed intake among dietary treatments. However, birds fed the diet containing AH showed a greater gain-to-feed ratio compared to the control group at 21 days of age and throughout the entire experimental period (P<0.05). Serum antioxidant enzyme activity, cecal short-chain fatty acid profiles, and tight junction-related gene expression were not affected by the dietary AH supplementation. Based on the results of the present study, dietary AH supplementation may improve the gain-to-feed ratio, but not gut health markers in broiler chickens from day 10 to 28.