• Title, Summary, Keyword: antimicrobial agents

Search Result 647, Processing Time 0.037 seconds

The Antimicrobial Food Packaging: Application of Antimicrobial Agents in Food Packaging (항균 식품포장: 식품 포장에서의 항균물질의 응용)

  • Cha, Dong-Su;Kweon, Dong-Keon;Park, Hyun-Jin
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.11 no.2
    • /
    • pp.101-107
    • /
    • 2005
  • The term 'antimicrobial' packaging encompasses any packaging technique(s) used to control microbial growth in the food product. These include packaging materials and edible films and coatings that contain antimicrobial agents, and also techniques that modify the atmosphere within the package. In recent years, antimicrobial packaging has attracted much attention from the food industry because of the increase in consumer demand for minimally processed, preservative-free products. Reflecting this demand, the preservative agents must be applied to packaging in such a way that only low levels of preservatives come into contact with the food. The film or coating technique is considered to be more effective, although more complicated to apply. New antimicrobial packaging materials are being developed continually. Many of them exploit natural agents, to control common food-borne microorganisms. Current trends suggest that in due course, packaging will generally incorporate antimicrobial agents and the sealing systems will continue to improve. The focus of packaging in the past has been on the appearance, size and integrity of the package. A greater emphasis on safety features associated with the addition of antimicrobial agents is perhaps the next area for development in packaging technology.

  • PDF

Antimicrobial Activities of Extracts of Camellia sinensis (L.) O. Kuntze and Profile of Antimicrobial Agents Resistance for Carbapenem-Resistant Enterobacteriaceae

  • Yum, Jong Hwa
    • Biomedical Science Letters
    • /
    • v.25 no.3
    • /
    • pp.288-292
    • /
    • 2019
  • In vitro antimicrobial activities of hot water extracts of Camellia sinensis (L.) O. Kuntze, for carbapenem-resistant Enterobacteriaceae (CRE) were compared to commonly used conventional antimicrobial agents. CRE was not only resistant to imipenem, meropenem or ertapenem, but also to various antimicrobial agents, such as amikacin (> $128{\mu}g/mL$). The hot water extracts of Camellia sinensis (L.) O. Kuntze had the lowest MIC ($0.06{\sim}0.5{\mu}L/mL$) of the carbapenem-resistant E. coli, K. pneumoniae, and Enterobacter spp. tested, and it was possible more potent than various conventional antimicrobial agents. Synergistic combinations of the extract with used commonly antimicrobial agents might even improve its antimicrobial chemotherapy property.

Adsorption and Thermostability of Antimicrobial Agents on Synthetic Ceramic Powder (합성 세라믹분말에 대한 항균성물질의 흡착 및 내열성)

  • 김현수;성림식;유대식
    • KSBB Journal
    • /
    • v.15 no.6
    • /
    • pp.594-599
    • /
    • 2000
  • The adsorption of the antimicrobial agents and their heat-resistance were investigated for the packaging film manufacture, wherein, the antimicrobial agents were adsorbed on a ceramic component. The naturally sourced antimicrobial agents were produced by methylotropic actinomycetes strains MO-16 and MO-17, extracted with ethylacetate. Antimicrobial action was stable to $121^{\circ}C$ and 1 atm. for 30 min., showing wide-ranging activity to the Gram(+) and the Gram(-) bacteria. Antimicrobial agents, adsorbed on ceramic Ce-1, retained activity to the Gram(+) and the Gram(-) species at $105^{\circ}C$ and $230^{\circ}C$ heat treatment, and methanol extracted antimicrobial agents from Ce-1 treated at $230^{\circ}C$ for 30min., retained activity to Gram(+) bacteria. In the presence of oxygen during the heat treatment process, antimicrobial agents adsorbed on ceramic Ce-1 showed antimicrobial activity to Gram(+) and the Gram(-) bacteria.

  • PDF

Antimicrobial Characterictics of Antimicrobial Agent (Antibiotics) and Reduction Effect on Mal-ordour. (항균제의 항균특성 및 악취제거 효과)

  • Shin, Choon-Hwan;Kim, Jong-Hyun;Han, Sun-Hong
    • Journal of Environmental Science International
    • /
    • v.3 no.2
    • /
    • pp.157-164
    • /
    • 1994
  • Various antimicrobial agents are widely used for the purpose of antimicrobial process. We investigated antimicrobial activity and reduction efficiency of mal-ordour by the diphenyl ether compound (2,4,4'- trichloro -2'- hydroxy diphenyl ether) against Sraphylocom aureus(S.aureus and Proton vulgaris(p.vulgaris causing the mal-ordour, Especially, the diphenyl ether compound is not restricted to the regulation of water-contamination. In this research, we found that the optimum concentration of diphenyl ether compound was 1.5w% for both strains and antimicrobial expressions were c0.38t= 2.56 for S.aureus, c0.38t=2.67 for P.vulgaris. We found also that -OH group played the role of antimicrobial functional group. Lastly, reduction effect of mal-ordour was more than 90% for both strain at the optimum conditions. Key Words : antimicrobial agents, antimicrobial activity, reduction effect of mal-ordour, antimicrobial expression, antimicrobial functional group.

  • PDF

The efficiency of topical anesthetics as antimicrobial agents: A review of use in dentistry

  • Kaewjiaranai, Thanawat;Srisatjaluk, Ratchapin Laovanitch;Sakdajeyont, Watus;Pairuchvej, Verasak;Wongsirichat, Natthamet
    • Journal of Dental Anesthesia and Pain Medicine
    • /
    • v.18 no.4
    • /
    • pp.223-233
    • /
    • 2018
  • Topical anesthetics are commonly used in oral & maxillofacial surgery to control pain in the oral cavity mucosa before local anesthetic injection. These anesthetic agents come in many forms, developed for different usages, to minimize adverse reactions, and for optimal anesthetic efficiency. Earlier studies have revealed that these agents may also limit the growth of microorganisms in the area of anesthetic application. Many topical anesthetic agents show different levels of antimicrobial activity against various bacterial strains and Candida. The dosage of local anesthetic agent used in some clinical preparations is too low to show a significant effect on microbial activity. Efficiency of antimicrobial activity depends on the local anesthetic agent's properties of diffusion within the bloodstream and binding efficiency with cytoplasmic membrane, which is followed by disruption of the bacterial cell membrane. The antimicrobial properties of these agents may extend their usage in patients to both control pain and infection. To develop the topical local anesthetic optimal usage and antimicrobial effect, a collaborating antiseptic agent may be used to benefit the local anesthetic. However, more research is required regarding minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of topical local anesthetic agents with drug interaction between anesthetics and antiseptic agents.

Antimicrobial Agents and Applications on Polymeric Materials (고분자재료에 대한 항균성 물질과 적용)

  • Lee, Jae-Woong
    • Textile Coloration and Finishing
    • /
    • v.20 no.3
    • /
    • pp.39-56
    • /
    • 2008
  • A wide variety of materials including aldehydes, cationic agents, alcohols, peroxygens, phenols and chlorinated phenols, metal ions are being employed as biocides. Among three levels for biocidal functions (sanitization, disinfection and sterilization), disinfection is an enough level for antimicrobial textiles. In terms of antimicrobial agents for textile applications, quaternary ammonium salts (QAS), chitosan, metal and metal salts, N-halamine based materials are developed with numerous research and the positive ions of those materials may result in disinfection of microorganisms. Photocatalysts, especially titanium dioxide (titania) produces the hydroxyl radical (${\cdot}\;OH$) which causes inactivation of microorganisms after UV radiation, have been used for antimicrobial applications.

Effects of Dietary Antimicrobial Agents, Probiotics or Yucca Extract on Urease Activity and Ammonia Production in the Chicken Intestine (사료중 항균제, 생균제 또는 유카 추출물이 닭의 장내 요소 분해효소 활성과 암모니아 생산에 미치는 영향)

  • 김규일;여진모
    • Korean Journal of Poultry Science
    • /
    • v.22 no.2
    • /
    • pp.105-115
    • /
    • 1995
  • The balance of microbial populations in the gastrointestinal (GI) tract of all warm-blooded animals is critical to the maintenance of health and resistance to disease. The composition of the populations can be altered by diet and environment, making the host animal susceptible to disease, and reducing growth rate and feed efficiency. Some feed additives including antimicrobial agents, prohiotics or yucca extract have been used to promote growth and feed utilization. There is evidence that part of growth-promoting effect of those feed additives results from the suppression of microbial urease activity or ammonia production in the GI contents of animals. Over 200 microbial species have been known to produce urease and the product of urea hydrolysis, ammonia, is toxic to animals. Carefully tested probiotics or other urease-suppressing agents can be a possible alternative to antimicrobial agents including antibiotics as growth promotants used for animals feeds.

  • PDF

Distribution and Characterization of Integrons in Enterobacteriaceae Isolates from Chickens in Korea

  • Sung, Ji Youn;Oh, Ji-Eun
    • Journal of Microbiology and Biotechnology
    • /
    • v.24 no.7
    • /
    • pp.1008-1013
    • /
    • 2014
  • The use of antimicrobial agents for additives or therapeutics is strongly associated with a prevalence of antimicrobial resistance in commensal Enterobacteriaceae. We aimed to characterize integrons in Enterobacteriaceae isolates obtained from chicken cecums in Korea. Moreover, the correlation between integron gene cassettes and antimicrobial resistance was also investigated. A total of 90 isolates the belonged to Enterobacteriaceae were recovered from chickens grown at Gyeongsang and Chungcheong provinces in Korea. Antimicrobial susceptibility tests were performed by the disk diffusion method. PCR and DNA sequencing were also performed to characterize the gene cassette arrays of the integrons. Of the 90 Enterobacteriaceae isolates tested, 39 (43.3%) and 10 (11.1%) isolates carried class 1 and 2 integrons, respectively. Whereas the class 2 integron did not contain gene cassettes, the class 1 integrons carried seven different gene cassette arrays. The class 1 integrons harbored genes encoding resistant determinants to aminoglycosides (aadA1, aadA2, and aadA5), trimethoprim (dfrA1, dfrA12, dfrA17, and dfrA32), lincosamides (linF), and erythromycin (ereA). Moreover, the presence of a class 1 integron was significantly related to a high resistance rate of antimicrobial agents, such as spectinomycin and trimethoprim. We confirmed that diverse class 1 integrons were widely distributed in Enterobacteriaceae isolates from chickens and directly contributed to the resistance to diverse antimicrobial agents in Korea.

Antimicrobial Effects of Lonicera japonica against Gram Positive and Gram Negative Anaerobic Bacteria

  • Rhee, Ki-Hyeong;Lee, Keyong-Ho
    • Natural Product Sciences
    • /
    • v.17 no.1
    • /
    • pp.23-25
    • /
    • 2011
  • It has been shown that the butanol extract of Lonicera japonica has antimicrobial and other potentially useful biological activities. The purpose of this study was to determine the in vitro activity of Lonicera japonica compared to other antimicrobial agents against anaerobic bacteria. Specifically, the in vitro activity of the butanol extract was investigated against 104 clinical isolates of anaerobic bacteria using an agar dilution method and the results were compared to erythromycin, cefoxitin, imipenem, clindamycin, and metronidazole. It was found that Lonicera japonica and imipenem were the most active antimicrobial agents tested.

Antimicrobial activity of Medicinal Plant Extracts against Streptococcus mutans

  • Eum, Jin-Seong;Park, Young-Doo
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • /
    • pp.980-981
    • /
    • 2008
  • This study was carried out to research antimicrobial agents from medicinal plants, Lonicera japonica, Pinellia ternata, Dictamnus albus, Cryptotympana pustulata, Pinus densiflora, Bupleurum falcatum, Forsythia saxatilis, Castanea crenata, Hovenia dulcis, Prunus sargentii. The ethanol extracts of 10 medicinal plants were tested for the antimicrobial activity against Streptococcus mutans. The extracts of Pinus densiflora showed significant antimicrobial activity against Streptococcus mutans. These results suggested that the extract from Pinus densiflora could be a candidate for new antimicrobial agents against Streptococcus mutans.

  • PDF