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광주지역 내 유통 중인 반려동물 사료·간식의 미생물 오염도 및 식품첨가물 사용실태 조사
임대웅,김지연,안아진,박지영,정하진,곽진주,서두리,이재기,장미선,지태경,김용환,Lim, Daewoong,Kim, Ji Yeon,An, Ahjin,Park, Jiyeong,Jeong, Hajin,Gwak, Jinju,Seo, Doori,Lee, Jae Gi,Jang, Miseon,Ji, Taekyeong,Kim, Yonghwan 한국동물위생학회 2022 韓國家畜衛生學會誌 Vol.45 No.3
This study was conducted for safety evaluation on 130 pet food products, which are distributed in Gwangju, South Korea. The microbial contamination part and the usage of food additives part were mainly investigated. The five microorganisms that we tested were total viable cell counts (TVC), Coliforms, Salmonella spp., Campylobacter spp., pathogenic Escherichia coli and there were 15 products that exceed the microbial criteria or detected food poisoning bacteria. Specifically, Coliforms (13 products, 10%), TVC (9 products, 6.9%), Salmonella spp. (2 products, 1.5%), and E. coli (2 products, 1.5%) were followed. On the other hand, food additives such as preservatives, antioxidants and sodium nitrite were detected in 61 products. Among the preservatives, sorbic acid and benzoic acid were detected in 58 (44.6%) products. In antioxidants, Butylated hydroxytoluene (BHT) was detected in 3 (2.3%) products. In addition, preservatives and antioxidants were detected in 8 of 20 products labeled as 'additive-free'. Microbial contamination tended to occur mainly in small-scale individual homemade feed stores, while food additives were all detected in pet shops and supermarkets. Currently, the criteria for microorganisms and food additives for pet foods are insufficient in Korea. So, it is necessary to establish detailed feed standards and specifications for companion animals.
복합재료의 연결부위에서 Design형태에 따른 강도평가와 재설계에 관한 연구
김익태,곽대웅 홍익대학교 산업기술연구소 2000 産業技術 Vol.10 No.-
This paper is concerned with the mechanical behaviour of in-plane joints in composite structures. The impetus behind research stems from the growing development in modular construction techniques that offer competitive global access to higher technology. Characterisation of bonding response is important, as in most instances the primary role of a adhension is to impart bonding rigidity. A test programme involving several commonly used joining methods, including lap joints, internal spline and external tape, coupled with flexible and inflexible adhesives is used to demonstrate the mode of failure and strength of the joined composites and the process of redesign will be added later research work.