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        검색결과 64

        41.
        2013.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Antibiotic Detection Kit (Combination I), a lateral flow immunoassay (LFIA) developed for the detection of antibiotic residues in milk, was utilized for the analysis of antibiotic residues in the muscle tissue of olive flounder. After 60-min treatment by dipping in water dosed with ampicillin (200-g/ton water), the residue depletion of ampicillin was investigated in 25 cultured olive flounder (Paralichthys olivaceus). Muscles of fish were sampled on the 1st, 2nd, 3rd, 4th and 5th day after drug treatment. The concentration of ampicillin in the muscle was determined by LFIA. The absorbance ratio of the sample to the control blank (Bs/Bo) was employed as an index to determine the muscle residues in olive flounder. To investigate the recovery rate, standard solutions were added to muscle samples to give final concentrations in the muscle of 4 and 8 ng/ml. The recovery rates of all spiked samples were > 96% of the spiked value. Ampicillin was detected in the muscle of fish treated with the drug until the 2nd day of the withdrawal period. The present study showed that the LFIA can be easily adopted to predict ampicillin residues in tissue of farmed fishes.
        3,000원
        42.
        2013.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Streptococcus suis (S. suis) is a major swine pathogen and an emerging zoonotic agent and is an increasing public health problem across Asia. The present study was undertaken to estimate the antibacterial effect of GR extract and therapeutic effect of GR extract against S. suis infection in mice. At the concentration of GR extract 2.5 mg/ml, the antibacterial effect was not shown on S. suis. However, the antibacterial effect against S. suis was observed at the concentration of GR extract 5.0 mg/ml. Oral administration of GR extract at the dose of 10 mg/kg showed a therapeutic effect for S. suis infected BALB/c mice. The mortality of GR extract-treated mice at the concentration of 5, 10 and 20 mg/kg was 80%, 70%, and 50% at 12 days, respectively, while that of untreated mice was 100% at 8 days after a lethal dose of S. suis infection. The results of our study strongly indicate that GR extract has potential as an effective for S. suis infection in mice.
        3,000원
        43.
        2013.03 구독 인증기관 무료, 개인회원 유료
        Amoxicillin, a well-known antibiotic, has a broad spectrum against gram-negative and gram-positive bacteria. This experiment was conducted in order to investigate the effect of micronized and non-micronized amoxicillin prepared using different comminution techniques on change in blood concentration of rats. Forty adult male Sprague Dawley rats (6~7 weeks of age, body weight 128.3 ± 10.7 g) were randomly allocated to two treatment groups: micronized amoxicillin (MA) group treated with micronized amoxicillin trihydrate powder (particle size, over 90% of 10 μm), non-micronized amoxicillin (NMA) group treated with non-micronized amoxicillin trihydrate powder (particle size, over 70% of 100 μm), given 480 mg/kg body weight once daily for four days. The results showed a significant increase in serum concentration in the MA group on days 3 and 4, compared to the NMA group (P<0.05). In particular, serum concentration of the MA group on day 4 was increased almost two times that of the NMA group. The results indicate that due to the increase of the drug’s oral bioavailability, higher serum concentration would be achieved with the micronized amoxicillin trihydrate than with the non-micronized drug.
        4,000원
        45.
        2012.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Ely's test is commonly used to assess rectus femoris muscle flexibility. however, a reliability limit of this test was demonstrated by a previous study. In this study, we present an alternative method using an application for a digital horizontal level in a smartphone (DHLS) to complement the reliability limit of Ely's test. The aim of this study was to examine the reliability of Ely's test using DHLS on the pelvis, compared to using visual observation (VO) of pelvic and hip motions. Nineteen patients with lumbar extension-rotation syndrome were recruited for this study. An examiner examined the rectus femoris flexibility (both pass/fail and goniometer scoring) through Ely's test using both DHLS and VO. A retest session was completed two hours later for within-day reliability and seven days later for between-day intra-rater test-retest reliability. Results showed higher Kappa values for pass/fail scoring and higher intraclass correlation coefficient values for goniometer scoring in Ely's test using DHLS, compared to using VO. Measurement error and Bland and Altman plots further demonstrated the degree of intra-rater variance during Ely's test using DHLS in a clinical setting, compared to using VO. These results demonstrated that Ely's test using DHLS showed acceptable reliability compared to using VO. Ely's test using DHLS could be widely used for measuring the rectus femoris muscle flexibility in patients with lumbar extension-rotation syndrome, although the inter-rater reliability needs to be established first.
        4,000원
        46.
        2012.06 구독 인증기관 무료, 개인회원 유료
        The objectives of the current study were to evaluate the therapeutic effect of dioctahedral smectite (smectite) against calf diarrhea caused by pathogenic E. coli and/or Salmonella typhimurium. In this study, 20 calves (aged 2~3 months) with diarrhea were used for evaluation of the efficacy of smectite on calf diarrhea with 20% smectite suspension in PBS. Calves received 10 ml smectite suspension three times per day after feeding, and fecal samples were collected at the gate of treatment and on the first, second, third, fourth, and fifth day after administration. On the fifth day after treatment with smectite suspension, the diarrhea index showed a significant decrease in the treated group, compared to the control group (P<0.001). The number of pathogenic E. coli in feces of the treated group was significantly decreased, compared to each control group from the second day after treatment (P<0.001), and that of Salmonella typhimurium was significantly decreased from the first day after treatment (P<0.05). According to the results of the current study, 20% smectite suspension had a therapeutic effect on diarrhea caused by E. coli and/or Salmonella in calves.
        4,000원
        47.
        2012.03 구독 인증기관 무료, 개인회원 유료
        This study was conducted in order to examine the safety of bee venom as an alternative for antibiotics using male ICR mice. Five-week-old male mice received a single intravenous injection of a dried honey bee venom at the concentration of 0.25 mg/kg (a clinical dose) or 0.5 mg/kg through the tail vein and various pathophysiological analyses were performed after three days. No significant differences in changes of body weight were observed between the saline-treated control group and the experimental groups. In the hematological analysis, none of the parameters were affected by bee venom. In blood biochemistry analysis, none of the markers were affected by administration of bee venom. Similarly, there were no significant effects on markers for liver, kidney, and skeletal muscle functions in all treated- groups. On macroscopic examination, no remarkable lesions were detected in these organs. Because there were no adverse effects of the bee venom in a single intravenous toxicity test for three days, it was concluded that bee venom could be a candidate for a safe natural antibiotic for use in the animal production industry.
        4,000원
        48.
        2009.03 구독 인증기관 무료, 개인회원 유료
        The attachment and adhesion of RAW 264.7 and MC3T3-E1 cells to titanium (Ti) discs with various degrees of roughness was investigated. The attachment, adhesion, and proliferation of these cells were evaluated after 4 hr, 24 hr and 7 day incubations. Both RAW 264.7 and MC3T3-E1 cells showed a time-dependant correlation between attachment and adhesion on the surface of the titanium discs. Both types of cells tended to have higher survival rate on these discs as the surface roughness increased. The percentage of adherent inflammatory RAW 264.7 cells was greater than MC3T3-E1 cells at 24 hr, but this was reversed at 7 days in culture. The morphology of osteoblastic MC3T3-E1 cells at 24 hr, determined using a surface emission microscope (SEM), appeared flattened and spread out while inflammatory RAW 264.7 cells were predominantly spherical in shape. The adhesion of both cell types on the titanium discs was dependant on the levels of fibronectin adsorbed on the disc surface, indicating that serum constituents modulate the efficient adhesion of these cells. Our data indicate that the cellular response to the titanium surface is dependent on the types of cells, surface roughness and serum constituents.
        4,000원
        51.
        2002.10 구독 인증기관 무료, 개인회원 유료
        At present, most of web-based applications are on the basis of HTML-based form documents. These HTML-based form documents only play a role as user interfaces, but they don"t involve the procedures or rules of processing business works that aim to documents. However, form documents imply methods for treating documents, and these procedural knowledge embedded can utilize to actively perform business work processes. Procedural knowledge is defined in ERML(Executable Rule Markup Language), which is a XML-based rule markup language that has a format of Prolog rules. The ERML is not only executable in an inference engine, but also can be geared with WfMS (Workflow Management System) and can be used in a heterogeneous rule-based application. Thus, this paper proposes a ERML-based scheme for processing active documents as device for automating a workflow that involve a process of treating documents. Our active documents themselves involve declarative knowledge to support the process and control of business rules embedded in documents and the automation of processing documents. Also, we propose a framework for processing the defined active documents. In order to demonstrate the usefulness of the proposed framework, a prototype called ActiveWebForm is designed and implemented for a case of processing a request for requisition of IP(Internet Procurement) system. As a result, our approach is expected to contribute to intelligence and automation of Internet applications as processing documents by embedding declarative knowledge.
        4,000원
        52.
        2018.10 서비스 종료(열람 제한)
        Background : Hippophae rhamnoides L. are known for antioxidant, immunodeficiency, skin protection, influenza infection and prevention of heart disease. This study was carried out to confirm the possibility of functional food by changing the antioxidant effect using H. rhamnoides L. leaf extracts to the Gamju (sweet rice drink). Methods and Results : A total of 12 samples were made of different processes. Briefly, the H. rhamnoides L. leaf were extracted at 60℃ in two different conditions (EtOH 100%, water 100%). Gamju was fermented into three different koji (Aspergillus oryzae – red, yellow, black). In addition, The addition of H. rhamnoides L. leaf extracts were mixed in two ways (simultaneous saccharification, mixed after saccharification). Antioxidant activities were estimated by 2,2-diphenyl-1-picryl-hydrazil (DPPH) and reducing power assay. Total phenolic content (TPC) was determined by Folin-Ciocalteu method. In this study, we found that Gamju mixed with H. rhamnoides L. leaf increased antioxidant effects and TPC than the control (original Gamju). Moreover, the anti-oxidant effects of the mixed H. rhamnoides L. leaf with Gamju after saccharification exhibited more activity than simultaneous saccharification in DPPH assay. Conclusion : These results demonstrated that samples of added to the H. rhamnoides L. leaf could be use as functional food.
        53.
        2018.10 서비스 종료(열람 제한)
        Background : Forsythia suspensa Vahl (Oleaceae) is such an antioxidant source which is a slimbing plant widely distributed in China, Japan and Korea. The extracts of the dried fruits have been used for a long time as traditional Asian medicines to treat gonorrhea, erysipedas, inflammation and pharyngitis. It was also reported that F. suspensa was able to suppress vomiting, resist hepatic injure, inhibit of elastase activity, and exhibit diuretic, analgesic, antioxidant, anti-endotoxin and antiviral effects. This study was performed to investigate the antioxidant and whitening effect of F. suspensa extract and fractions. Methods and Results : Firstly, extract the dried F. suspensa by methanol three times at room temperature and fraction for each solvents (hexane, ethyl acetate, butanol and water). The DPPH radical scavenging activity was measured at 517 ㎚ by using a UV spectrophotometer. The gallic acid and quercetin were used as positive control of total phenol and flavonoid contents assay. Reducing power was conducted four concentration of samples and positive control, measured the absorbance at 700 ㎚. Ethyl acetate fraction showed the highest effect on DPPH radical scavenging activity, total phenol contents, and reducing power. On the other hand, the highest level of total flavonoid contents indicated in butanol fraction. The ethyl acetate fraction indicated the highest percentage of enzyme inhibition at the tested same concentration. Conclusion : These results suggest that F. suspensa extract and ethyl acetate fraction could be utilized as a antioxidant. Further biological and phytochemical study is needed.
        54.
        2018.09 KCI 등재 SCOPUS 서비스 종료(열람 제한)
        본 연구에서는 청국장 제조 시 고초균(B. subtilis)과 유산균인L. acidophilus균 복합사용이 청국장 품질 특성에 미치는 영향을 연구하였다. 타 장류와 달리, 청국장은 과당중합체와 폴리감마글루탐산의 복합체인 점질물질을 생성한다. 본 연구에서는 일반적인 청국장 발효과정(1차 발효) 후에 설탕(0, 2.5, 7.5%)을 첨가하고 균체외 다당류 생성능이 있는 유산균을 첨가하여 추가적으로 40℃에서 48시간 동안 2차 발효하였다. 2차 발효된 청국장 시료들의 가용성 고형분, 점질물의 신장성, pH, 환원당, 아미노태 질소함량, 암모니아태 질소함량, α-amylase, 및 protease 활성 측정, 이소플라본 함량을 평가하였다. 2차 발효 공정에서 설탕의 추가적인 첨가는 청국장 시료의 pH, 비배당체 이소플라본 함량, 아미노태 질소함량과 protease 활성을 저하시킨 반면, 청국장 점질물의 신장성과 산(acid) 생성 미생물의 생육을 증가시켰다. 결론적으로, 본 연구에서는 청국장 제조 시 B.subtilis과 L. acidophilus균 복합사용이 청국장 점질물질의 생성을 촉진하고 청국장 품질 특성을 변화시킨다는 것을 보여준다.
        55.
        2018.04 KCI 등재 SCOPUS 서비스 종료(열람 제한)
        This study was conducted to investigate the quality characteristics and changes in isoflavone content of Cheonggukjang with added Chaga mushroom by secondary fermentation at 40 for 48 h with or without a starter, Lactobacillus acidophilus KCTC 3925. Cheonggukjang samples were divided into three groups: Control (unsterilized Cheonggukjang fermented without a starter), NS (unsterilized Cheonggukjang inoculated with L. acidophilus KCTC 3925), and YS (heat-sterilized Cheonggukjang inoculated with L. acidophilus KCTC 3925). The approximate composition of the three types of Cheonggukjang was 49.79-51.44% moisture, 4.54-4.72% crude ash, 43.21-44.37% crude protein, 11.58-13.65% crude fat, 37.41-40.07% carbohydrate, 31.92-33.82% dietary fiber. The mineral content included 5.43– 9.64 mg% Na, 1,792.86–1,824.39 mg% K, 253.69–326.09 mg% Ca, 619.37–691.20 mg% P, 92.59–110.59 mg% Fe, and 0.01–0.02 mg%Cd. Free amino acid contents of NS (2,520.92 mg%) and YS (2,421.94 mg%) were significantly higher than that of the control (2,236.76 mg%). Amino-type nitrogen content for the three types of Cheonggukjang ranged from 837.20-920.27 mg% with no significant difference. Ammonia-type nitrogen content ranged from 137.09-169.36 mg%. Supplement of Cheonggukjang with L. acidophilus KCTC 3925 increased production of aglycone isoflavons compared to that of control. Therefore, our results show that fermenting Chaga Cheonggukjang with L. acidophilus KCTC 3925 leads to improved quality characteristics and increased isoflavone aglycone content.
        56.
        2017.08 KCI 등재 서비스 종료(열람 제한)
        This study was conducted to analyze the muscle activity in the right forearm and shoulderwhile doing the sowing activity by muscle type and work section, and to find the possibility of the utilization of sowing as a muscle exercise and rehabilitative activity based on the results of the analysis. The results showed that the activity of 7 muscles including the upper trapezius near the neck, the upper trapezius near the shoulder, the middle deltoid, the biceps brachii, the triceps brachii, the brachioradialis, and the flexor carpi ulnaris were significantly higher than the stable state. In addition, the muscle activity in the sections of mixing the soil, filling the tray with the soil, sowing, writing the label, and watering was significantly higher than the stable state. In particular, the muscle activity of the biceps brachii and the triceps brachii was statistically significantly high in the section of filling the tray with the soil, which indicates that the task of filling the tray with the soil can be utilized as an exercise to activate the biceps brachii and the triceps brachii. In addition, the muscle activity of the brachioradialis was significantly high in all the work sections, which indicates that the sowing process can be utilized to exercise the brachioradialis in particular. These results can be used as the basic data about the activated muscle types and degrees throughout the sowing process. These results can be also used to induce the activation of specific muscles, and the overall exercise and rehabilitation of the forearms.
        57.
        2017.06 KCI 등재 서비스 종료(열람 제한)
        It is difficult to measure precipitation due to spatial and temporal variability. In this study we analyzed the variability of precipitation of high- and low-rainfall regions in Bangladesh using Precipitation Concentration Index (PCI) from the data of two meteorological stations. We compared PCI values for various periods such as annual, supra-seasonal, seasonal, three and two-months. Most previous studies have analyzed the long-term precipitation in Bangladesh. We analyzed the variabilities from long-term to short-term and tried to characterize the irregular precipitation. In the result, the precipitation in Bangladesh was mostly concentrated between two and four months of the year. Future research will require more station data to understand the more detailed precipitation patterns in Bangladesh.
        58.
        2016.10 서비스 종료(열람 제한)
        Background : This study was carried out to distribute superior cultivars to farmers by analyzing growth characteristics of ginseng and effectively set the target for breeding by investigating annual agronomic characteristics of ginseng. Methods and Results : As a plant materials, Chunpoong (CP), Yunpoong (YP), Gopoong(GP), Gumpoong (GU) and Sunun (SU) were transplanted in Eumseong (ES), Geumsan (GS) and Yeoncheon (YC) on March 2013. Cultivation and management were conducted on the basis of the standard guidelines. According to stem and petiole by region, YC represent the largest stem diameter, leaf length and petiole length of cultivars, followed by those in ES and those in GS. Leaf growth of cultivars was overall the best in YC. Although CP had long and narrow leaves in all regions, YP and SU had short and narrow leaves. Root weight of all cultivars was the best in YC, but there was no significant differences by them. Growth of CP, YP and GP was generally good in ES. Growth of cultivars was relatively even in GS, but it was poor compared to cultivars which were cultivated in ES and YC. Conclusion : There were considerable differences in root growth of cultivars. However, this results suggest that CP of 4-year-old is produced stably in some regions because it had a small coefficient of variation.
        59.
        2012.12 KCI 등재 SCOPUS 서비스 종료(열람 제한)
        Astronomical Observations at Chungbuk National University Observatory (CBNUO) with an 1 m telescope have begun since April 2008, and Near-Earth Space Survey observations also have been started since November 2010, with a 0.6 m wide field telescope developed by Korea Astronomy and Space Science Institute. To improve observational efficiency, we developed a weather monitoring system enabling automatic monitoring for the weather conditions and checking the status of the observational circumstances, such as dome status. We hope this weather monitoring system can be helpful to more than 100 Korean domestic observatories, including public outreach facilities. In this paper, we present the statistic analysis of the weather conditions collected at CBNUO for 3 years (2009- 2011) and comparisons were made for clear nights between using only humidity data and both humidity and cloud data.
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