• 제목/요약/키워드: Susceptibility Effect

검색결과 665건 처리시간 0.027초

도축돈의 담즙, 뇨 및 장관에서 장내세균의 분리 및 항생물질 감수성 (Isolation of Enterobacteriaceae from bile, urine and intestine in slaughtered pigs and its susceptibility to antibiotics)

  • 허부홍;서석열;엄성심;김진환;윤창용;조정곤;송희종
    • 한국동물위생학회지
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    • 제19권3호
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    • pp.213-219
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    • 1996
  • Seventy-nine strains of Enterobacteriaceae isolated from 117 slaughtered pigs (bile, urine, small intestine, cecum and rectum) in 1995 were examined for biotypes and susceptibility to 19 antibiotics with MicroScan WalkAway 40/96. The obtained results were as follows : 1. Among the twenty-two species isolated from the samples, Proteus mirabilis, E. coli and Enterobacter cloacae were commonly encountered. 2. The distribution frequency of isolates from cecum, small intestine, rectum, bile, and urine was 31(38.8%), 25(31.3%), 18(22.8%), 3(3.7% ), and 2(2.5% ), respectively. 3. A majority of isolates were sensitive to 16 antibiotics, singly or in combination. And these isolates were commonly susceptible to various antibiotics such as Cp, Ts, Azt, Caz, To, Gm, Cfz, Crm, Am and Cfx, in order. Whereas the Salmonella spp was susceptible to Cf, Ti and Pi, and Proteus mirabilis to Imp, Tim, Cft and Cz. Meanwhile, no effect was found to Cf, Ak and Cax. 4. Among the antibiotic resistant strains, a total of 17 reistant patterns was noted End of these Ak Tim 45(57.0%), Ak Am Cf Cfx Cfz Tim 8(10.1%) and Ak Ti Tim 6(7.6% ) were frequently encountered.

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Prevalence of Listeria monocytogenes and Related Species in Minimally Processed Vegetables

  • Cho, Sun-Young;Park, Boo-Kil;Moon, Kwang-Deog;Oh, Deog-Hwan
    • Journal of Microbiology and Biotechnology
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    • 제14권3호
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    • pp.515-519
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    • 2004
  • Listeria spp. were isolated from a total of 402 naturally contaminated domestic ready-to-eat (RTE) vegetable samples by the conventional Food and Drug Administration protocol and confinned by API-Listeria kit. Also, the susceptibility to 12 antibiotics, polymerase chain reaction (PCR) assay for virulence gene of pathogenic Listeria monocytogenes isolates, and in vitro virulence assay using myeloma and hybridoma cells from murine and human sources were tested. Among the samples, 17 samples (4.2%) were found to be contaminated with Listeria species. Among the 17 strains of Listeria spp. isolates, only 2 strains (11.8%) of L. monocytogenes and 15 strains (88.2%) of L. innocua were identified. Antibiotic susceptibility test showed that the Listeria spp. isolates were very susceptible to the antibiotics tested, except for nalidixic acid. Among 17 strains of Listeria spp., PCR analysis showed that 2 strains of L. monocytogenes isolates proved to have a virulence hly gene, but none of L. innocua had the hly gene. Also, hybridoma Ped-2E9 cells assay showed that only L. monocytogenes isolates killed approximately 95-99% hybridoma cells after 6 h, but L. innocua isolates had about 0-5% lethal effect. These results indicate that PCR assay with hly primer or hybridoma Ped-2E9 cells assay could be used as a good monitoring tool or in vitro virulence test for L. monocytogenes.

SP-SSRT법에 의한 TMCP강 용접부의 응력부식균열 평가에 관한 연구 (A Study on the Stress Corrosion Cracking Evaluation for Weld Joint of TMCP steel by SP-SSRT Method)

  • 유효선;정희돈;정세희
    • Journal of Welding and Joining
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    • 제15권1호
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    • pp.46-54
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    • 1997
  • The object of this paper is to evaluate SCC(stress corrosion cracking) susceptibility for parent metal and bond line region of weld joints which have the various weld heat input condtions in TMCP(thermo-mechanical control process) steel by SP-SSRT(small punch-slow strain rate test) method. And the SCC test results of TMCP steel are compared with those of the conventional HT50 steel which has te almost same tensile strength level like TMCP steel. The loading rate used was $3\times10^{-4}$mm/min and the corrosive environment was synthetic sea water. According to the test results, in the case of parent metal, TMCP steel showed higher SCC susceptibility than HT50 steel because of the high plastic strain level of ferrite microstructure obtained by accelerated cooling. And in the case of bond line, the both TMCP steel and HT50 steel showed low load-displacement behaviors and higher SCC susceptibility above 0.6. These results may be caused by theembrittled martensite structure on HT50 steel and by the coarsened grain and the proeutectoid ferrite structure obtained by the impart of accelerated cooling effect on TMCP steel.

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결핵 예방 광고 메시지의 효과: 메시지의 지향성과 메시지 제시방법을 중심으로 (Effect of Tuberculosis Prevention Campaign Message: Focused on message orientation and message presentation style)

  • 최명일
    • 한국융합학회논문지
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    • 제10권12호
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    • pp.411-420
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    • 2019
  • 이 연구에서는 결핵예방 캠페인을 위한 효과적인 메시지 전략은 무엇인지를 분석하였다. 메시지 지향성(개인지향-사회지향)과 메시지 제시방법(통계-내러티브)에 따라 결핵감염의 개연성, 심각성, 예방행동의도에 어떠한 차이를 보이는지를 살펴보았다. 분석결과, 개인지향 메시지는 사회지향 메시지보다 결핵감염의 개연성과 심각성을 높이는데 효과적인 것으로 나타났다. 통계적 메시지와 내러티브 메시지 사이에는 유의미한 차이가 없는 것으로 나타났다. 마지막으로 개인지향 메시지의 경우에 내러티브 메시지가 통계적 메시지보다 효과적인 것으로 나타났으며, 사회지향 메시지는 통계적 메시지가 내러티브 메시지보다 효과적인 것으로 나타났다. 이러한 결과를 바탕으로 이론적 함의를 논의하고, 실무적으로 효과적인 결핵예방 캠페인 메시지 전략을 제안하였다.

싱글 소비자의 심리적 특성변수와 대인영향력에 대한 민감성이 의류쇼핑 추구가치에 미치는 영향 (Effects of Single Consumers' Psychologic Characteristics and Susceptibility to Interpersonal Influence on Clothes Shopping Pursuing Value)

  • 서용한
    • 한국의류산업학회지
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    • 제9권2호
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    • pp.229-236
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    • 2007
  • Many researchers have focused on consumers' clothes purchase behavior, These researches could not reflect the characteristics of the single consumers' clothes purchase behavior. In addition, little has been written on the single consumer. The purposes of this study are to identify the concept and psychologic characteristics of single consumer and investigate the effects of single consumers' psychologic characteristic and susceptibility to interpersonal influence on clothes shopping pursuing value. Also, It was analyzed how single consumer' pursuing values are different based on the type of single motivation. To test research problems, Data were collected by means of a survey questionnaire, which was sent to 300 single in Pusan and Ulsan. In total, 274 were returned and 14 were unusable because of unacceptable levels of missing data. The Results were summarized as follows: First, self-efficacy, informative and normative influence were positively related to utilitarian pursuing value employee satisfaction. Also, self-efficacy, variety seeking, innovativeness and informative influence had a positive effect on hedonic pursuing value. Second, voluntary single and nonvoluntary single group had different perceptions about self-efficacy, variety seeking, innovativeness, informative influence, and hedonic pursuing value.

Extrusion of Ginseng Root in Twin Screw Extruder: Pretreatment for Hydrolysis and Saccharification of Ginseng Extrudate

  • Han, Jae-Yoon;Kim, Mi-Hwan;Tie Jine;Solihin Budiasih W.;Ryu, Gi-Hyung
    • Preventive Nutrition and Food Science
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    • 제11권4호
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    • pp.318-322
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    • 2006
  • The objective of this experiment was to investigate the effect of extrusion of ginseng roots in twin screw extruder on susceptibility of ginseng starch toward hydrolysis by ${\alpha}-amylase$ BAN 480L (Novozyme, Denmark) and cellulase Celluclast 150L and saccharification by amyloglucosidase AMG-E (Novozyme, Denmark). The extrusion was conducted at 22% and 30% moisture contents of feed at screw speed 300 rpm. Barrel temperature at zone 1 was adjusted at $100^{\circ}C$ and $120^{\circ}C$. The results showed that extrusion process improved the ginseng ${\alpha}-amylase$ susceptibility as compared to traditionally dried ginseng (white and red ginseng). Reducing sugar of hydrolyzed extruded samples was 2,500% of its initial concentration, whereas the reducing sugar of hydrolyzed non-extruded sample was only 200% of its initial concentration. However, addition of cellulase during liquefaction lowered the saccharification yield of both non-extruded and extruded samples as well.

양돈장 사양관리와 도축돈 폐 병변조사 (Rearing managements of pig farms and survey on pneumonia of slaughtered pigs)

  • 추금숙;육현수;천희웅;송희종
    • 한국동물위생학회지
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    • 제29권1호
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    • pp.27-36
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    • 2006
  • This studies were carried out to investigate the rearing managements of pig farms and survey on pneumonia of the slaughtered pigs from 5 selected herds located in Jangsu, Jeonbuk. Isolated aerobic microorganisms from pneumonic lung were examined antibiotic susceptibility and tested serological antibody titers of the herd base. Prevalence rate of pneumonia were examined according to rearing and health management conditions of pig farms. Prevalence rate of pneumonia were detected in 78.8% and enzotic pneumonia. In 47.7%, pleuropneurnonia in 31.1%. In serological antibody titers showed the positive reaction with 54.4% in Actinobacillus pleuropneumonia serotype 5, 44.8% in Pasteurella multocida, 36.8% in A pleuropneurnonia serotype 2, 13.6% in Mycoplasmal pneumonia. Isolated aerobic microorganisms were examined antibiotic susceptibility and showed the high activity in gentamicin (58.3%), enrofloxacin (53.3%), norfloxacin (51.6%), cephalothin (41.7%) and low activity in amoxycillin (98.3%), oxytetracycline (98.3%), penicillin G (90.0 %), tetracycline (88.4%), ampicillin (88.3%). Farm managements were deficient effect of humidity in swine house but ammonia gas all appeared the 10 ppm that were recommendation density, below.

일정 변형률 시험에 의한 TRIP강의 수소 지연파괴 특성연구 (Study on the Hydrogen Delayed Fracture Property of TRIP Steel by Slow Strain Rate Testing Method)

  • 조정현;이종권
    • Corrosion Science and Technology
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    • 제10권4호
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    • pp.131-135
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    • 2011
  • The demands of high-strength steel have been steadily increased to reduce the weight of vehicles. Although the TRIP steel has been the promising candidate material for the purpose, high strength hinders the application due to the susceptibility to hydrogen delayed fracture in the corrosive environment. Moreover, the testing method was not specified in the ISO standards. In this work, the test method to evaluate the susceptibility of hydrogen delayed fracture was studied by slow strain rate testing technique. The four test experimental parameters were studied : strain rate, hydrogen charging time, holding time after hydrogen charging, and holding time after cadmium plating. The steel was fractured by hydrogen in case the strain rate was in the range of $1{\times}10^{-4}{\sim}5{\times}10^{-7}/sec$. It was confirmed that the slow strain rate test is effective method to evaluate the susceptibility to hydrogen delayed fracture. The holding time over 24 hrs after hydrogen charging, nullified the hydrogen effect, that is, the specimen was no more susceptible to hydrogen after 24 hrs even though the specimen was fully hydrogen-charged. Moreover, cadmium electroplating could not prevent from diffusing out the hydrogen from the steel in the experiment. The effective experimental procedures were discussed.

Long-term prenatal stress increases susceptibility of N-methyl-D-aspartic acid-induced spasms in infant rats

  • Kwon, Hyeok Hee;Lee, Taekwan;Hong, Jinpyo;Kim, Dong Woon;Kang, Joon Won
    • Clinical and Experimental Pediatrics
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    • 제61권5호
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    • pp.150-155
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    • 2018
  • Purpose: Infantile spasms, also known as West syndrome, is an age-specific epileptic seizure. Most patients with this condition also exhibit delayed development. This study aimed to determine the effect of long-term prenatal stress on susceptibility to infantile spasms. Methods: We subjected pregnant rats to acute or chronic immobilization stress. Resulting offspring received N-methyl-D-aspartic acid (15 mg/kg, intraperitoneally) on postnatal day 15, and their behaviors were observed 75 minutes after injection. The expression of KCC2 and GAD67 was also determined using immunohistochemistry. Results: Exposure to long-term prenatal stress increased the frequency of spasms and decreased the latency to onset of spasms compared with offspring exposed to short-term prenatal stress. Expression of KCC2 and GAD67 also decreased in the group exposed to long-term prenatal stress compared with the group exposed to short-term prenatal stress. Conclusion: Our study suggests that exposure to long-term prenatal stress results in increased susceptibility to seizures.

전류에 의한 철단결정의 교류 자기감수율 : 전류 변화에 의한 효과 (AC susceptibility of current-carrying iron whiskers : Effect of current variation)

  • Jae-Gwang Lee
    • 한국자기학회지
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    • 제5권3호
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    • pp.179-184
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    • 1995
  • {100} 철단결정에 자기장을 가해주거나 혹은 자기장 없이 전류만을 변화 시킬 때의 교류 자기감수율에 관하여 연구 하였다. 작은 자기장과 전류를 철단결정에 걸어줄때, 단결정의 단연적 중앙끈처에는 정사각형 자구가 형성된다. 실험을 통하여 이 자구의 자기화 방향으로 자장을 걸어주변 걸어주는 전류크기와 전류방향의 영향을 받음을 보인다. 이 실험 결과는 전류에의해 중앙에 형성된 자구가 전류의 증감함에따라 변화하는 자구크기로 설명할 수 있다. 실험으로 측정된 자기강수율을 설명하기 위하여 미세 자기이론을 사용하였으며, energy 값을 구히기 위하여 간단한 model을 설정하였다. 이 model로부터 교류 자기감수율을 구할 수 있었으며, 이때 계산한 교류 자기감수율은 한 안정된 구조에서 다른 안정된 구조로 변화하는 전류를 제외한 거의 대부분 전류에 대하여 정량적으로 설명할 수 있었다.

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