경북지방(慶北地方) 젖소로 부터 Brucella abortus의 분리(分離) 및 균형별(菌型別)

정종식,조용준,박청규,Chung, Jong-sik,Cho, Yoong-jun,Park, Cheong-kyu 대한수의학회 1988 大韓獸醫學會誌 Vol.28 No.2

Serological study and isolation of Brucellae from dairy cattle were carried out in Kyungpook area of Korea during the period from 1984 to 1985. Biotyping of the isolates was done. Of the 11168 cattle in 2479 herds examined, 27 cattle (0.24%) in the 17 herds (0.69%) were serologically positive for brucellosis. Brucella abortus was recovered from 20 (74.1%) of the 27 infected cattle, and all the strains of the isolates belonged to biotype 1. Of the tissues cultured for brucellae, the supramammary lymph nodes had the highest rate (55.6%) of recovery of brucella organisms.

젖소 유방원(乳房源) 병원세균(病原細菌)의 항생물질(抗生物質)에 대(對)한 감수성(感受性)

정종식,조성환,조용준,박청규,Chung, Jong Sig,Cho, Sung Whan,Cho, Yoong Jun,Park, Cheong Kyu 대한수의학회 1979 大韓獸醫學會誌 Vol.19 No.1

The sensitivities of 270 pathogens (124 Streptococci, 118 Staphylococci, 10 Corynebacterium pyogenes and 18 Escherichia coli) isolated from clinical or subclinical cases of bovine mastitis during lactation to 11 antibiotics were determined by the agar plate dilution method. All cultures of Streptococci were inhibited at $1.56{\mu}g/ml$ of ampicillin and 1.56 units/ml of penicillin G. Most of the cultures were inhibited at $3.125{\mu}g/ml$ of leukomycin, but were resistant to kanamycin, streptomycin, chloramphenicol, erythromycin and colistin at concentration of $12.5{\mu}g/ml$. More than 93% of the Staphlococcal cultures were sensitive to kanamycin, leukomycin, ampicillin, tetracycline, ledermycin and minocycline at concentrations of $12.5{\mu}g/ml$ or less, and sensitive to penicillin at concentration of 3.125 units/ml, but for more than 71% of the cultures to chloramphenicol, erythromycin and colistin the concentrations required to inhibit growth were 100 ${\mu}g/ml$ or higher. All 10 cultures of Corynebacterium pyogenes were inhibited by leucomycin, ampicillin and minocycline at concentration of $1.56{\mu}g/ml$ and by penicillin G at concentration of 0.78 units/ml, but all the cultures required at least $400{\mu}g/ml$ or higher of streptomycin, erythromycin and colistin for inhibition. More than 83% of E. coli cultures were sensitive to erythromycin and minocycline at concentration of $12.5{\mu}g/ml$, but resistant to leucomycin and chloramphenicol at concentration of $100{\mu}g/ml$.

의사 돼지콜레라 발생농장 역학조사

박노찬 ( No Chan Park ),조광현 ( Kwang Hyun Cho ),김영환 ( Young Hoan Kim ),김순태 ( Soon Tae Kim ),김성국 ( Sung Kuk Kim ),박인화 ( In Hwa Park ),조민희 ( Min Hee Cho ),오강희 ( Gang Hee Oh ),손재권 ( Jae Kweon Son ),정종식 ( Jon 한국가축위생학회 2003 韓國家畜衛生學會誌 Vol.26 No.2

This study was conducted to survey the farm which suffered from disease similar to classical swine fever(CSF) in Gyeongbuk province. Clinical signs appeared first in a few number of growing pigs which showed specific signs of diarrhea, depression, sleepiness, and reluctance to get up or to eat. Younger piglets may have appeared chilled, shiver and huddle together. As the disease progresses the affected pig`s skin went red and purple. In histopathological signs, there were many haemorrhages througout the body and larger haemorrhages in some organs such as lymph nodes. And there is a precipitous fall in the number of circulating leukocytes in the blood. In spite of insisting of farmer which did not vaccinate to classical swine fever, significant antibody production was detected in these affected pigs at enzyme-linked immuonsorbent assay. According to the above results at first glance, these affected pig suspected with CSF in clinical signs and histopathological lesions only. Because the symptoms and post-mortem picture were very similar to CSF, these false positive results would have been dangerous to diagnostician. But by reverse transcriptase polymerase chain reaction(RT-PCR) and comparative nucleotide sequence ananlysis, the disease was correctly diagnosed with post-weaning multisystemic wasting syndrome(PMWS) and porcine reproductive and respiratory syndrome(PRRS) compoundly. And the antigen which were detected the lesion similar to CSF virus, was confirmed with LOM vaccine strain of CSF. In most national CSF eradication program arid in countries which are free of the CSF virus, vaccination against CSF is not practiced and generally is not allowed. But now in Korea, routine vaccination is practiced because of outbreaking the CSF repeatedly. When CSF is diagnosed the whole herd and other in contact animal are slaughtered continuously.

경북지방 돼지의 전염성 위장염에 대한 혈청학적 역학조사

조광현 ( Kwang Hyun Cho ),박최규 ( Choi Kyu Park ),김영환 ( Young Hoan Kim ),박인화 ( In Hwa Park ),김성국 ( Sung Kuk Kim ),박노찬 ( No Chan Park ),정종식 ( Jong Sik Jyeong ) 한국가축위생학회 2001 韓國家畜衛生學會誌 Vol.24 No.3

Swine sera collected from January to December 2000 were tested for the survey on transmissible gastroenteritis(TGE) infection in Gyeongbuk province. Serum neutralization(SN) test was performed in finishing pigs of 50 pigs industry without clinical signs of TGE and sows, gilts and growing pigs of four pigs industry with TGE. As the results of SN test in fifty industry, antibody titers of 90.6%(474/523 samples) showed below 4. Antibody titers of them showed highly in two pigs industry of western region and three pigs industry of southern region of Gyeongbuk province. The results indicated that TGE had been occurred before in five pigs industry. Most of antibody titers showed of highly in four pigs industry having had TGE. There were no significant differences of the antibody titers of TGE according to age when the survey was made. The above results indicated that the pigs of Gyeongbuk province were not almost exposed in porcine respiratory coronavirus(PRCV) by present.

인터넷企業의 知識提携 파트너 選定 決定要因에 관한 實證硏究

鄭鐘植(Jeong Jong-Sik),朴映泰(Park Young-Tae) 한국마케팅과학회 2004 한국마케팅과학회 학술대회 발표 논문집 Vol.- No.-

  This research examined the factors to have effects on partner selection for knowledge alliances driven by internet companies in Korea. The research results have the implications as follows.<BR>  First, they take social relationships and social range of partner’s social networks into consideration to hold in check competitors of the same kind or of a different kind. Second, social relationships, social unities and social ranges of partner’s social networks have effects separately on partner’s company characteristics, knowledge characteristics and integration capacity. Third, company characteristics and knowledge characteristics are much more affected than social unity and social range by social relationships to use partner’s formal and informal networks facilitating trust, commitment etc in the process.

사라리 축우페사의 원인에 관한 연구

정종식 ( Jong Sik Jyeong ),박노찬 ( No Chan Park ),김정화 ( Jung Hwan Kim ),김영환 ( Young Hoan Kim ),조광현 ( Kwang Hyun Cho ),조민희 ( Min Hee Cho ),손재권 ( Jae Kweon Son ),김영욱 ( Young Wook Kim ) 한국가축위생학회 1999 韓國家畜衛生學會誌 Vol.22 No.4

This study was conducted to investigate the epidemiological, clinicopathological, microbiological, pathological observations and other tests from sudden death in feedlot cattle at the region of Sarari in Korea during the period from 1994 to 1999. Massive or sporadic occurrence of sudden death has been observed in 101 heads of 47 farmhouse. There were 20.8% in spring, 29.7% in summer, 16.8% in autumn, 32.7% in winter, and 62.3% in reproductive, 27.7% in growing, 5.0% in beef cattle, 5.0% in calf in prevalence of sudden death in cattle. Enterotoxemia(88.0%), pneumonia(3.5%), intestinal diarrhea(3.5%), liver abscess(1.5%) and indigestion(1.5%) were detected from 67 heads of sudden death cattle. In clinical observations, cattle were generally died of sudden recumbency with convulsions followed anorexia, depression, ataxia, muscular tremor, tachycardia and dyspnea without any premonitory symptoms. Epidemiological surveys showed no evidence that other factors such as pesticide, insecticide, fertilizer, chemical drugs and those of others caused sudden death. Macroscopically, there were coagulation disorders of blood, congestion, edema and haemorrhage of lung, congestion and haemorrhages, watery and blood-tinged contents of small intestine. Histopathologically, we observed pulmonary congestion and haemorrhage, necrotic intestinal mucosa accompanied with haemorrhage and congestion, and also increased globule leukocytes between bronchial epithelia with mild pneumonia. Clinicopathologically, only elevation of blood glucose and aspartate aminotransferase (AST) was detected. Magnesium and calcium deficiency were not detected, but parasites were detected highly in normal and dead cattles. Microbiologically, Clostridium(Cl) perfringens were detected from small intestinal contents of 94%(63/67) of sudden death cattle and 51%(51/101) of slaughter cattle, and the population were 10(6-8)cfu/mℓ after 16~32 hours. Consequently, it was proved that the cause of death in cattle was enterotoxemia. Pathogenic test of mouse and goat inoculated with Cl perfringens type A toxin has been demonstrated as similar observation to natural cases. In antimicrobial susceptibility test, ampicillin, bacitracin, polymycin, cephalothin, penicillin, choramphenicol, erythromycin, tetracycline were highly susceptible, and amikacin, gentamicin, kanamycin, neomycin, streptomycin, sulfamethoxine, sulfamethazine were resistant. Cl perfringens were resisted for 4 hours in 3% formalin, 20 minutes in 4% phenol, 20 minutes in 05% mercuric chloride and 40 minutes in 0.1% sodium hydroxide, respectively. The useful method to prevent from occurrance of enterotoxemia in feedlot cattle was a dietary administration of antibiotics and miyari acid.

企業間 電子商去來 假像市場 네트워크의 學習經路에 관한 硏究

정종식(Jeong Jong-sik),박영태(Park Young-tae),김웅진(Kim Woong-jin) 한국문화산업학회 2003 문화산업연구 Vol.3 No.1

The emergence of business-to-business e-marketplace spanning both vertical and horizontal markets has relandscaped the competitive playing field in nearly every industry over the past few years by aggregating scale and spends, increasing market and value chain transparency, automating transactions along the value chain. The traits uncovered in business-to-business e-marketplaces are the taking initiative of leading companies in e-marketplace, value chain composing of promoting commerces etc, wide alliance network, and B2B in relation to B2C etc. The network is made up of manufacture knowledge assets, marketing knowledge assets, contents knowledge assets, information system operating knowledge assets, markets and industries knowledge assets, products and services knowledge assets, logistics knowledge assets. The emergence of business-to-business e-marketplace spanning both vertical and horizontal markets has relandscaped the competitive playing field in nearly every industry over the past few years by aggregating scale and spends, increasing market and value chain transparency, automating transactions along the value chain. The traits uncovered in business-to-business e-marketplaces are the taking initiative of leading companies in e-marketplace, value chain composing of promoting commerces etc, wide alliance network, and B2B in relation to B2C etc. The network is made up of manufacture knowledge assets, marketing knowledge assets, contents knowledge assets, information system operating knowledge assets, markets and industries knowledge assets, products and services knowledge assets, logistics knowledge assets.

전략적 네트워크의 사회적 자본 형성방법에 관한 연구

정종식(Jeong Jong-sik),박영태(Park Young-tae) 한국문화산업학회 2004 문화산업연구 Vol.4 No.1

Social network and social capital in the context of organization has gained considerable attention in recent years. In this paper, we attempt to provide methods of creating social capital to enhance competitiveness of individual, company, region etc. Methods of building social capital including various contracts like alliances, collaborations etc., leader’s initiatives to bring it up, e-integration between individuals, companies and any other groups, holding of colorful events by the participants etc., are provided by strategic networks. The dimensions of social capital, structural dimension, relational dimension, cognitive dimension, influence each other and social capital have traits much to be useful for organizations and networks. Social network and social capital in the context of organization has gained considerable attention in recent years. In this paper, we attempt to provide methods of creating social capital to enhance competitiveness of individual, company, region etc. Methods of building social capital including various contracts like alliances, collaborations etc., leader’s initiatives to bring it up, e-integration between individuals, companies and any other groups, holding of colorful events by the participants etc., are provided by strategic networks. The dimensions of social capital, structural dimension, relational dimension, cognitive dimension, influence each other and social capital have traits much to be useful for organizations and networks.

戰略的 네트워크의 社會的 資本에 관한 考察

정종식(Jeong-Sik Jung),박영태(Young-Tae Park) 한국무역학회 2003 한국무역학회 국제학술대회 Vol.2003 No.10

Social network and social capital in the context of organization has gained considerable attention in recent years. In this paper We attempt to provide social capital to enhance competitiveness of individual, company, region etc. Methods of building social capital including various contracts like alliances, collaborations etc., leader's initiatives to bring up it, e-integration between individuals, companies and any other groups, holding of colorful events by participants etc., are provided by strategic networks. The dimensions of social capital, structural dimension, relational dimension, cognitive dimension, influence each other and social capital have traits much to be useful for organizations and networks.

글로벌 제휴 의사결정이 제휴활동에 미치는 영향에 관한 실증연구

정종식(Jong-Sik Jeong),박도준(Do-Joon Park) 국제e-비즈니스학회 2013 e-비즈니스 연구 Vol.14 No.1