• 제목/요약/키워드: Screening Time

검색결과 1,098건 처리시간 0.063초

Identification and Cultural Characterization of Lipase Production Bacteria Isolated from Pond Effluent Sedimentary Layer (양식장 배출수 퇴적층에서 분리된 리파아제 생산 박테리아의 동정 및 배양학적 특성)

  • Kim, Man-Chul;Jang, Tae-Won;Harikrishnan, Ramasamy;Jang, Ik-Soo;Yeo, In-Kyu;Jeong, Joon-Bum;Heo, Moon-Soo
    • Korean Journal of Microbiology
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    • 제45권1호
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    • pp.58-62
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    • 2009
  • From the course of screening of useful enzyme producing microorganism from marine sedimentary layer, we isolated 2 lipase producing strains and their lipase producing activities were tested. 16S rDNA sequence analysis showed that they were Gram-positive bacteria grouped on Janibacter sp. An excellent lipase producing strain, Janibacter sp. LI-68 and J. sp. LI-80 identified by 16S rDNA analysis and biochemical methods (BIOLOG), was further studied its lipase producing characteristics. The optimum initial pH, temperature and the optimum cultral time for the enzyme production on MA medium were 8, 3040C and 96 h, respectively.

A Study on the Usefulness of Subjective Lumbar Instability Factor for Respiratory Pattern Change and Abdominal Mobility in Peoples with CLBP (만성허리통증자의 호흡 패턴과 배부 운동성 변화에 대한 주관적 허리부위 불안정성 요소의 유용성에 관한 연구)

  • Ki, Chul;Lee, Kwan-Woo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • 제21권3호
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    • pp.206-214
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    • 2020
  • This study examined the correlation between the respiratory pattern change (RPC) and abdominal mobility (AM) according to the positive result of the subjective lumbar instability factor (SLIF) in people with chronic low back pain (CLBP). Thirty-six adults with CLBP participated in this study. Twenty-eight items of the SLIFs were examined, and the subjects were divided into three groups according to the positive response numbers (PRN). After the change lists were scored, three RPC scores [costo-diaphragmatic RPC (CDRPC), breath hold change (BHC), and total RPC (TRPC)] were obtained. The abdominal mobility (AM) was measured between the maximal inspiration and exhalation at the xiphoid (AM1) and the 10th rib (AM2) level of the trunk. The results showed that the RPC score and AM were compared according to the positive response number of SLIF, and the relationship between them was analyzed. A positive correlation was observed between the SLIF positive response number and CDRPC score, BHC score, and total RPC score, and a negative correlation was observed between the SLIFs positive response number and AM1 and AM2. Based on the results of this study, the combination of SLIF positive responses can be a predictor of non-physiological respiratory pattern changes in people with CLBP. Clinically, this prediction is expected to help save time for screening and improve the efficiency of therapy.

Hemato-Biochemical Indices of Hanwoo Cattle Raised at Different Altitudes (서로 다른 고도에서 사육된 비육한우의 혈액-혈청 지수)

  • Ji, Joong-Ryong;Alam, Md. Rafiqul;Na, Chong-Sam;Kim, Nam-Soo
    • Journal of Veterinary Clinics
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    • 제28권2호
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    • pp.219-224
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    • 2011
  • The health status of three groups of Hanwoo steers (n=157) aged 2-3 years, raised at three different altitudes (600 m, n=50; 200-400 m, n=58; plane land, n=49) and environment with more or less similar management have been evaluated through hematological, biochemical and globulin examinations in order to determine the optimum environment suitable for raising cattle while at the same time minimizing the risk of disease. Five mL of blood samples from each animal were collected by jugular veinipuncture and 2 mL was transferred to a tube containing EDTA for complete blood count (CBC) and 3 mL in lithium heparin for chemistry screening (CS) and immunoassay. Among the CBC parameters a significantly higher white blood cell count (tWBC), total red blood cell count (tRBC), hemoglobin (Hb) and packed cell volume (PCV) were noticed in the high altitude groups, whereas those were lower in the plane land group. In the CS parameters higher levels of aspartate aminotransferase (AST), creatinine, lactate dehydrogenase (LDH) and total bilirubin (TBL) were found in the plane land group, whereas those were lower in the high altitude groups. The total protein (significantly) and globulins were higher in the 600 m group. The results of this study revealed that the overall health status of the Hanwoo cattle based on the hemato-biochemical indices was superior in the highest altitude and inferior in the plane land group but all the parameters were within the reference range in all the groups. Therefore, for recommendation of a suitable environment at an appropriate altitude for raising cattle there need to be further studied along with the hemato-biochemical parameters; considering, breeding, feeding, management, marketing, waste disposal and other factors.

A clinical study on the relation between facial paralysis and acupoints on the face and the upper limbs by the use of DITI diagnosis (적외선 체열진단을 이용한 안면마비와 안면과 상지에 분포한 경혈위와의 관계에 대한 임상고찰)

  • Kim, Jin-Won;Jeong, Byeong-Ju;Kim, Yong-Ho;Seo, Ho-Seok;Hwang, Gyu-Dong;Son, Ji-Hyung;Han, Seung-Hea
    • The Journal of Internal Korean Medicine
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    • 제25권4호
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    • pp.140-146
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    • 2004
  • Objectives : this study is to see if there is a significance in thermal differences of acupoints in diagnosis and treatment period of facial paralysis and to substantiate the validity of acupuncture and moxibustion treatment for it. Methods : 1. By using DITI, thermal differences of acupoints on the face and the upper limbs of 13 Bell's palsy patients were measured around 3 days after an attack of the disease. These 13 patients, whose treatment progress was monitored up to 6 months after attack, were among the inpatients and outpatients of oriental internal medicine of National Medical Center from July 1 to August 31. 2. The patients were divided into 1month, 2-3months, 4months, 6months groups according to the occasion of improvement and thermal averages of each treatment period measured. Results : When it takes within 1 month for the condition of facial paralysis to change for the better, DITI image shows the temperature of the affected face parts and arms is higher than that of the non-affected parts. However, when it takes more than 4 months, the temperature of the affected face parts and arms on DITI image is lower than that of the non-affected parts. Conclusions : Hereby, prognosis of the disease and necessary time for the treatment can be presumed through DITI screening after an occurrence of facial paralysis. Also, condition of the disease is reflected by thermal differences of acupoints for Bell's palsy treatment that are in accordance with the theory of meridian on the face. This supports the efficacy of acupuncture and moxibustion treatment for this disease.

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A Study on Diagnostic Criteria of Noise-Induced Hearing Loss among Workers in an Iron Foundry (철강공장 근로자를 대상으로 살펴본 소음성 난청 진단기준에 관한 조사)

  • Kim, Ji-Yong;Lim, Hyun-Sul;Cheong, Hae-Kwan;Moon, Ok-Ryun
    • Journal of Preventive Medicine and Public Health
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    • 제26권3호
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    • pp.371-386
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    • 1993
  • This study was carried out to evaluate diagnostic criteria of noise-induced hearing loss (NIHL) among-workers in an iron foundry. Of 1,093 workers under the observation of noise-specific health examination, 184 workers were selected by way of first and second screening audiometric examination. A questionnaire survey, otological examinations, Rinne test and audiometric test were performed and the results were as follows ; The degree of hearing impairment in the left ear was more severe than in the right ear (p<0.05). The difference between hearing threshold of the first and the second hearing test at 1,000 Hz was about 5 dB with a narrow range of deviations while the difference at 4,000 Hz was about -7 dB with a wide range. Of the total study workers, 84.8% were tested within 15 hours away from noise exposure, and the rest after 16 hours. This study has identified that mean hearing loss at 4,000 Hz showed a significant statistical difference among the two study groups while mean hearing loss by 4-divided classification did not. The same phenomena were observed between the group with and without tinnitus and between the group with and without difficulty in hearing (p<0.05). Among 184 workers, 10 workers (5.4%) diagnosed as NIHL by old diagnostic criteria in contrast to 150 workers diagnosed as NIHL by the new diagnostic criteria. There was a significant difference between the two groups in the average hearing loss at 4,000 Hz and 4-divided classification (p<0.01), but there were no significant differences in age, the duration of employment, blood pressure and the duration wearing the personal hearing protector (p>0.05). If we apply Early Loss Index (ELI) method, some workers in younger age group diagnosed as NIHL by the new diagnostic criteria were fallen into within the normal range. In the mean time older age group show reverse results in contrast to the above finding. It is too early to confirm the value of the usage of the new diagnostic criteria in hearing examination. Further study is called for to verify the value of this criteria.

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A study on Quality Control of Mammography Equipment in the Gwang-Ju (일부지역 유방 촬영 장비의 정도관리 실태조사 연구)

  • Shin, Ji-Yun;Lee, Sang-Bock;Jin, Gye-Hwan;Lee, Sam-Yeol;Lee, Jun-Haeng
    • Journal of the Korean Society of Radiology
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    • 제2권4호
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    • pp.11-25
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    • 2008
  • As breast cancer shows the highest incidence among women's cancers, the use of mammography is also increasing as a screening test. Mammography should produce high-quality images for accurate diagnosis. For this, it is necessary to manage the performance and image quality of mammography. Thus, in order to investigate quality control, the present study conducted a questionnaire survey of 37 hospitals registered as breast cancer medical examination centers in Gwang-Ju, concerning their quality control of mammography. In the results of surveying the characteristics of apparatus use for mammography, many respondents did not know about the equipment that they were using. Of the hospitals, 19 (49%) were using film, 19 (49%) CR, and 1 DR. In the results of asking how to do quality control, only 38% answered that they inspected according to the manual. In addition, all the surveyed hospitals had specialized agencies do quality control for them. As to the reason for using agencies, 65% mentioned limitations in personnel, time, distance, etc, and 44% mentioned the absence of machines and materials. These results suggest that quality control is being performed perfunctorily, as well as passively and indifferently as it relies on specialized agencies. Accordingly, it is necessary to provide regular education for enhancing people's perception of quality control and to perform quality control adequately in the presence of Radiologist.

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Optimization of a Virus-Induced Gene Silencing System with Soybean yellow common mosaic virus for Gene Function Studies in Soybeans

  • Kim, Kil Hyun;Lim, Seungmo;Kang, Yang Jae;Yoon, Min Young;Nam, Moon;Jun, Tae Hwan;Seo, Min-Jung;Baek, Seong-Bum;Lee, Jeom-Ho;Moon, Jung-Kyung;Lee, Suk-Ha;Lee, Su-Heon;Lim, Hyoun-Sub;Moon, Jae Sun;Park, Chang-Hwan
    • The Plant Pathology Journal
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    • 제32권2호
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    • pp.112-122
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    • 2016
  • Virus-induced gene silencing (VIGS) is an effective tool for the study of soybean gene function. Successful VIGS depends on the interaction between virus spread and plant growth, which can be influenced by environmental conditions. Recently, we developed a new VIGS system derived from the Soybean yellow common mosaic virus (SYCMV). Here, we investigated several environmental and developmental factors to improve the efficiency of a SYCMV-based VIGS system to optimize the functional analysis of the soybean. Following SYCMV: Glycine max-phytoene desaturase (GmPDS) infiltration, we investigated the effect of photoperiod, inoculation time, concentration of Agrobacterium inoculm, and growth temperature on VIGS efficiency. In addition, the relative expression of GmPDS between non-silenced and silenced plants was measured by qRT-PCR. We found that gene silencing efficiency was highest at a photoperiod of 16/8 h (light/dark) at a growth temperature of approximately 27C following syringe infiltration to unrolled unifoliolate leaves in cotyledon stage with a final SYCMV:GmPDS optimal density (OD)600 of 2.0. Using this optimized protocol, we achieved high efficiency of GmPDS-silencing in various soybean germplasms including cultivated and wild soybeans. We also confirmed that VIGS occurred in the entire plant, including the root, stem, leaves, and flowers, and could transmit GmPDS to other soybean germplasms via mechanical inoculation. This optimized protocol using a SYCMV-based VIGS system in the soybean should provide a fast and effective method to elucidate gene functions and for use in large-scale screening experiments.

Making Differential Diagnosis of Biliary Atresia Using Endoscopy (내시경을 이용한 영아 담즙울체 질환의 감별진단에 대한 연구)

  • Beck, Nam-Seon;Kang, I-Seok;Tchah, Hann
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • 제4권1호
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    • pp.71-76
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    • 2001
  • Purpose: Many diagnostic modalities for neonatal cholestasis have shown features that are helpful, however until recently none of them are not pathognomonic of biliary atresia (BA). We carried out a prospective study of infants with cholestatic jaundice with the aim of establishing an efficient method of diagnosing BA. Methods: Twenty-seven consecutive infants with cholestatic jaundice were enrolled in this study and ranged from 7 to 152 days in age (mean; 51.2±34.2 days). Gastroduodenoscopy was carried out using a fiberscope (Olympus N30). All the babies were fasted for at least 4 hours before the procedure and 20 ml of 10% dextrose solution was given at the time of endoscopy. The endoscopic examination focused on the 5 minutes observation of the evidence of biliary secretion. If there was lack of the evidence of the biliary secretion, endoscopy was removed and repeated the examination with some pause. Results: There are lack of the evidence of biliary secretion in all infants with BA. In non-BA group, 8 out of the 10 infants showed biliary secretion on the first trial, however one (Alagille syndrome) of the two infants without evidence of biliary secretion, finally exhibited biliary secretion on the second trial. The above observations resulted in the diagnostic accuracy of 96.3% with 100.0% sensitivity and 90.0% specificity. Conclusion: In light of the results from our relatively small study, endoscopy is a convenient, and relative inexpensive procedure. we strongly support the use of endoscopy for the diagnosis of BA in the screening and evaluation of infantile cholestasis.

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Measurement of Human Cytochrome P450 Enzyme Induction Based on Mesalazine and Mosapride Citrate Treatments Using a Luminescent Assay

  • Kim, Young-Hoon;Bae, Young-Ji;Kim, Hyung Soo;Cha, Hey-Jin;Yun, Jae-Suk;Shin, Ji-Soon;Seong, Won-Keun;Lee, Yong-Moon;Han, Kyoung-Moon
    • Biomolecules & Therapeutics
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    • 제23권5호
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    • pp.486-492
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    • 2015
  • Drug metabolism mostly occurs in the liver. Cytochrome P450 (CYP) is a drug-metabolizing enzyme that is responsible for many important drug metabolism reactions. Recently, the US FDA and EU EMA have suggested that CYP enzyme induction can be measured by both enzymatic activity and mRNA expression. However, these experiments are time-consuming and their interassay variability can lead to misinterpretations of the results. To resolve these problems and establish a more powerful method to measure CYP induction, we determined CYP induction by using luminescent assay. Luminescent CYP assays link CYP enzyme activity to firefly luciferase luminescence technology. In this study, we measured the induction of CYP isozymes (1A2, 2B6, 2C9, and 3A4) in cryopreserved human hepatocytes (HMC424, 478, and 493) using a luminometer. We then examined the potential induction abilities (unknown so far) of mesalazine, a drug for colitis, and mosapride citrate, which is used as an antispasmodic drug. The results showed that mesalazine promotes CYP2B6 and 3A4 activities, while mosapride citrate promotes CYP1A2, 2B6, and 3A4 activities. Luminescent CYP assays offer rapid and safe advantages over LC-MS/MS and qRT-PCR methods. Furthermore, luminescent CYP assays decrease the interference between the optical properties of the test compound and the CYP substrates. Therefore, luminescent CYP assays are less labor intensive, rapid, and can be used as robust tools for high-throughput CYP screening during early drug discovery.

Optimization of extraction conditions of flavonoid compounds from Thyme (Thymus vulgaris Libiatae) (타임으로부터의 플라보노이드 화합물의 추출 조건 최적화)

  • Park, Yunjin;Lee, Jumi;In, Man-Jin;Chae, Hee Jeong
    • Journal of Applied Biological Chemistry
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    • 제63권1호
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    • pp.111-116
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    • 2020
  • Total polyphenol contents, flavonoid contents, 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activities of ethanol extracts of 20 herbal plants (sage, turmeric, mace, bayleaf, fenugreek, oregano, blackpepper, whitepepper, clove, marjoram, cinnamon, coriander, basil, dillseed, mustard, cadamon, thyme, celery, rosemary, cumin) were analyzed for the screening of high flavonoid-containing plant resource. Thyme extract, showing the highest flavonoid content and a high degree of antioxidant activity, was selected as a bioactive cosmetic material. The total polyphenols and flavonoids contents of thyme extracts were measured as 6.90 mg chlorogenic acid equivalent (CAE)/100 g and 1.71 mg naringin equivalent (NE)/100 g, respectively, and DPPH radical scavenging activities was 90%. Among the tested organic solvents, hexane gave the highest extraction yield. Thus hexane was selected as the most suitable solvent for the extraction of thyme. Response surface method was used to obtain optimized extraction conditions for thyme: reaction temperature of 35.9 ℃, raw material to hexane ratio of 1.63:25 (w/v), and reaction time of 192 min. These predicted extraction conditions was validated by a total flavonoid extraction experiment showing a value equivalent to 96.3% of the predicted total flavonoid content. It is expected that the optimized solvent extraction conditions could be used for the production of flavonoid using thyme.