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한우분에 굴 패각분말을 첨가 시 분의 특성과 미생물에 미치는 영향 -실험실 연구를 중심으로-
장홍희,주영호,서명지,김지윤,이성신,최정석,정승민,노현탁,김삼철,Chang, Hong Hee,Joo, Young-Ho,Seo, Myeong-Ji,Kim, Ji-Yoon,Lee, Seong-Shin,Choi, Jeong-Seok,Jeong, Seung-Min,Noh, Hyeon-Tak,Kim, Sam-Churl 한국환경과학회 2021 한국환경과학회지 Vol.30 No.8
To improve the environmental management and resources, in this study, we aimed to investigate the effect of adding oyster shell powder to Hanwoo manure on its characteristics and microbial composition during the storage period. Additives were deposited on top of the manure surface at the rate of 0, 0.5, and 1% of oyster shell powder per 200 g of Hanwoo manure in a plastic container with three replicates; however, untreated manure litter served as the control. Manure characteristics (dry matter, organic matter and crude ash) and microbial composition (lactic acid bacteria, yeast, Bacillus subtilis, Salmonella, and E.coli) were evaluated at day 0, 2, 4, and 8. Manure characteristics exhibited an effect on dry matter, organic matter, and crude ash at day 2 and 8 (p<0.05), and not for day 0 and 4 (p>0.05). With the exception of yeast content at day 4 of storage, lactic acid bacteria, yeast, Bacillus subtilis, Salmonella, and E.coli exhibited no significant differences in all conditions during the storage period. Conclusively, addition of 1% oyster shell powder to Hanwoo manure resulted in slightly better manure characteristics; however, its microbial composition remained unchanged.
원저 : 삼백초 ethanol 추출물의 RAW 264.7세포 내 살모넬라균 감염에 대한 항균 효과
이진주 ( Jin Ju Lee ),김동혁 ( Dong Hyeok Kim ),임정주 ( Jeong Ju Lim ),김대근 ( Dae Geun Kim ),김곤섭 ( Gon Sub Kim ),민원기 ( Won Gi Min ),이후장 ( Hu Jang Lee ),장홍희 ( Hong Hee Chang ),김석 ( Suk Kim ) 한국수의공중보건학회 2010 예방수의학회지 Vol.34 No.4
Salmonellosis is the commonest zoonosis worldwide that generally causes enterocolitis and foodborne poisoning which represents a considerable public health burden. Salmonella spp. are potential enteric pathogens and intracellularly replicates in host cells resulting in chronic infections. The medical treatments for salmonellosis have been difficult yet and had a serious problem including the increasing emergence of antibiotic resistance. The present report was designated to investigate the antibacterial effects of Saururus chinensis Baill ethanol extract (SCEE) on pure culture and infection with Salmonella enterica serovar Typhimurium (S. typhimurium) in murine derived macrophage RAW 264.7 cells. In determination of antibacterial activity of SCEE against S. typhimurium, bacterial viability was markedly decreased compared to the control. Also, SCEE significantly induced morphological change (p<0.05) of RAW 264.7 cells. In infection assay of S. typhimurium in RAW 264.7 cells pretreated with 100㎍/㎖of SCEE, which is a non-cytotoxic concentration, bacterial uptake ability of macrophage was increased corresponding with morphological change, whereas bacterial survival rates within macrophage were markedly reduced compared with untreated control. Furthermore, nitric oxide (NO) production in SCEE-treated cells was slightly increased until 2 h but showed a tendency of decrease after 4 h until 24 h post infection compared with untreated control with S. typhimurium infection. Taken together, these findings demonstrated that SCEE has the antibacterial activity for S. typhimurium and the protective effects against S. typhimurium infection through activating murine macrophage independent on NO, suggesting that SCEE may be beneficial on the disease caused by intracellularly replicating pathogens as a safe alternatives of conventional chemotherapies.
축산을 위한 환경제어 및 자동화 사양관리 시스템 설게에 관한 문헌 연구
장동일,장홍희,Chang, Dong-Il,Chang, Hong-Hee 한국축산환경학회 1995 축산시설환경학회지 Vol.1 No.1
The objective of this study was to review and analyze the application technologies of electronics and microprocessor for environment control and automated management systems of livestock production of the advanced countries, and to select the appropriate and applicable technologies for our systems among the analyzed. In this study, the environment control systems were analyzed mainly on the poultry production systems and the automated management systems on swine and dairy production systems. According to the results, the advanced technologies reviewed and analyzed could be applicable for designing our animal production systems, if those were modified and remodeled for our situation.
수유행동시 모돈(랜드레이스×요크셔) 발성음의 개체 판별을 위한 음성 파라미터
전중환,장홍희,하정기,김현희,구자민,이효종,연성찬,Jeon, Jung-Hwan,Chang, Hong-Hee,Ha, Jeung-Key,Kim, Hyeon-Hui,Koo, Ja-Min,Lee, Hyo-Jong,Yeon, Seong-Chan 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.1
The aim of the present study was to analyse grunts of the sows and to extract parameters from the time and frequency signals in nursing behavior. Five crossbred $Landrace{\times}Yorkshire$ sows were used on day 5 or 6 postpartum. The grunts and the behaviors of the five sows were recorded with five digital camcorders. Three parameter groups [Group I: Formant vector alone, Group II: Formant vector+parameters from time signal, Group III: Formant vector+parameters from time signal-parameters eliminated by stepwise discriminant analysis backward (SDAB)] with parameter vectors extracted from single grunts in the maximum grunting rate period were used for individuality of the sows. The parameter groups were compared by a discriminant function analysis. The classification system adopted in the Group II represented the higher discriniation rate than those in other groups (Group I: 63.3%, Group II: 83.0%, Group III: 80.0%). This study demonstrated that formant, intensity, and pitch were available sound parameters for individuality of the sows during nursing behavior.