• 제목/요약/키워드: Green Media

검색결과 326건 처리시간 0.022초

항진균성 펩티드에 의한 표고버섯 푸른곰팡이병의 억제 (Suppression of green mold disease on oak mushroom cultivation by antifungal peptides)

  • 이형진;윤영배;허정훈;김영기
    • Journal of Applied Biological Chemistry
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    • 제60권2호
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    • pp.149-153
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    • 2017
  • 원목과 톱밥배지에서 푸른곰팡이의 오염과 성장은 표고버섯의 생장을 심하게 저해할 수 있다. 표고버섯 재배에서 푸른곰팡이병의 방제를 위하여 농약과 항생제와 같은 화학 약품의 사용은 일반적으로 허용되지 않는다. 본 연구에서는 푸른곰팡이병의 방제를 위하여 느타리버섯에서 갈반병을 일으키는 세균성 병원균을 분리하고 이들의 펩티드 독소를 분리하였다. Pseudomonas tolaasii 균주들은 항진균 활성을 갖는 톨라신 및 이와 구조적 유사체인 다양한 펩티드 독소를 분비한다. 이러한 펩티드들은 표고버섯의 생장에는 영향을 주지 않는다는 것이 알려져 있다. 펩티드 독소들을 Trichoderma harzianum H1 푸른곰팡이에 처리하였을 때, 푸른곰팡이의 성장을 저해하였다. 펩티드를 분비하는 20 종의 P. tolaasii 균주 중에서 강, 중, 약의 항진균 활성을 가진 균주의 수는 각각 8, 5, 7 종으로 나타났다. 표고버섯을 재배하는 동안에, 펩티드 독소를 함유한 세균 배양액에서 세균을 제거한 배양원액을 톱밥배지 표면에 자란 푸른곰팡이 균사에 분무하였다. 배양원액은 푸른곰팡이의 성장은 억제할 수 있는 반면, 표고버섯 생장과 생산에는 영향을 주지 않았다. 펩티드 독소를 함유하는 배양원액은 곰팡이의 흰색 균사체를 노란색의 마른 딱지로 변화시켰고, 이것은 펩티드 독소가 강력한 항진균 활성과 살균 활성을 갖고 있음을 보여준다.

Sorption of I and Se onto Green Rusts with Different Interlayer Anions, GR(CO32-) AND GR(Cl-)

  • Min, J.H.;Baik, M.H.;Lee, J.K.;Jeong, J.T.
    • Journal of Nuclear Fuel Cycle and Waste Technology
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    • 제1권1호
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    • pp.57-63
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    • 2013
  • Natural green rust (GR) can retard the migration of anions through geological media because it has a Layer Double Hydroxyl (LDH) structure with a positive charge. In this study, the sorption behaviors of anions such as selenite ($Se(IV)O{_3}^{2-}$), selenate ($Se(VI)O{_4}^{2-}$), and iodide ($I^-$) onto green rusts with different structures, i.e., GR($Cl^-$) and GR($CO{_3}^{2-}$), were investigated by conducting batch sorption experiments in an anoxic condition. Experimental results showed that selenite was mostly sorbed onto GR($CO{_3}^{2-}$) and then partly reduced to metal selenium, Se(0). However, little selenate and iodide was sorbed onto GR($CO{_3}^{2-}$) while some iodide was sorbed onto GR($Cl^-$). It is presumed from the experimental results that the major sorption mechanism of $SeO{_3}^{2-}$ and $I^-$ onto green rusts is the anion exchange reaction with the anions existing in the interlayer of the rusts. Green rust, therefore, can play an important role in the retardation of anions migrating through deep geological environments owing to its LDH structure with a high anion exchange capacity.

저온저장으로 인해 손상된 살모넬라를 배양하기 위한 최적의 배지 선정에 관한 연구 (Determination of best enrichment media for growth of Salmonella injured from cold temperature during process and storage)

  • 박미경
    • 한국식품저장유통학회지
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    • 제23권6호
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    • pp.759-764
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    • 2016
  • 본 연구의 목적은 가금류에서 문제가 되고 있는 살모넬라 신속검출을 위해 광학현미경 기반 이미징 시스템 적용에 앞서서 냉장온도로부터 손상된 살모넬라를 증균시키기 위한 최적의 배지를 선정하는 것이다. 대표적인 식중독 유발균주인 S. Typhimurium과 S. Enteritidis를 닭에 도말 하였고 $4^{\circ}C$에서 24시간 동안 저장한 후 BPW, LB, BHI, UPB, NB, 그리고 TSB 배지와 BG, RV, SC, SB 그리고 TBS 선택배지에 각각 6시간 동안 배양하였다. 배양 후, 2시간마다 살모넬라 균수를 측정하였고 그 결과 BHI와 BG를 선택되었다. 최종적으로 최적의 배지 선택을 위해 다양한 농도의 살모넬라를 닭에 각각 도말 후 6시간 동안 배양하면서 균수를 변화를 측정하였다. 그 결과 BHI가 냉해로부터 손상된 살모넬라를 증균시키기 위한 가장 최적의 배지로 선정되었으며 본 연구의 결과는 광학현미경 기반 이미징 시스템을 활용한 신속검출법 적용을 위한 증균배지로 이용될 것이다.

Experimental Evaluation of Filter Performance of Depth Filter Media Cartridge with Varying the Pleat Count and the Cartridge Assembly Arrangement

  • Hasolli, Naim;Park, Young-Ok;Rhee, Young-Woo
    • 한국입자에어로졸학회지
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    • 제8권4호
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    • pp.133-141
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    • 2012
  • A new depth filter media was designed and samples of flat sheet as well as cartridge assembly were prepared and tested to evaluate the filtration performance and compare with the commercial product. The arrangement of the depth filter media layers is important to reach the optimal filtration parameters like filter pressure drop, particle collection efficiency and dust holding capacity. Initially, both flat sheet samples of new media and commercial product have been tested using standard test units. Tests with new depth filter media cartridges of various pleat count were conducted in order to find the optimal pleat count which would represent the lowest pressure drop. These tests give an insight on how the pleat count and the assembly configuration affect the performance of the depth filter media cartridge. By comparing the samples with a commercial product we could confirm relatively high filtration performance of the sample cartridge with pleat count 150 made of new depth filter media. The cartridge with the same pleat count exhibits better performance without the outer mesh.

음용 차의 항우식 효과 (Anticariogenic Effects of Different Types of Tea)

  • 정일용;이주영;김미아;이대우;양연미;김재곤
    • 대한소아치과학회지
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    • 제44권4호
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    • pp.437-445
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    • 2017
  • 이 연구의 목적은 한국인들이 일상적으로 마시는 서로 다른 네 종류의 차 티백을 이용하여 차가운 생수나 뜨거운 생수로 5분 또는 10분 동안 우려내는 일상적인 방법으로 차를 추출하였을 때 각각의 추출물이 Streptococcus mutans 세균막 성장에 미치는 효과를 알아보고자 하였다. 균주는 S. mutans UA 159를 이용하였고 1%의 sucrose와 각각의 차 추출물을 웰 플레이트에 넣고 배양하였다. 추출 온도에 따른 세균막 형성을 비교 했을 때 녹차와 홍차에서 추출 온도가 높을 때 세균막 형성이 적었고 통계적으로 유의하였다(p < 0.05). 추출 시간을 달리 하고 $72^{\circ}C$ 온수로 많은 양을 추출 했을 경우 세균막 형성을 비교 했을 때는 네 종류 차 모두 추출 시간에 대해서 통계적으로 유의하지 않았다. 한편 추출량에 따른 비교에서는 녹차와 홍차의 경우 같은 시간, 같은 온도로 추출하였을 때 추출량이 적다면 오히려 세균막 성장이 증가하였다.

옥상 내 저관리 도시농업에서 친수성 중합체 배합비에 따른 가지(Solanum melongena)의 생육반응 (Growth Responses of Eggplant (Solanum melongena) to Hydrophilic Polymer Mixture Ratio in Growing Medium for Lower Maintenance Urban Agriculture via Green Roofs)

  • 주진희;김원태;허혜;윤용한;최은영
    • 한국환경과학회지
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    • 제25권5호
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    • pp.625-633
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    • 2016
  • This study was conducted to investigate the influence of hydrophilic polymer (HP) mixture ratio (Control, 1.0%, 2.5%, 5.0%, and 10.0%) on growth of eggplant (Solanum melongena) for lower maintenance urban agriculture via green roofs. Although it was not statistically significant (p > 0.05), substrate temperature was decreased as hydrophilic polymer mixture ratio were increased. High substrate water content (95%) was found consistently in growing media under elevated hydrophilic polymer mixture ratio at over 5% during the entire growing period. Substrate electronic conductivity was increased as hydrophilic polymer mixture ratio were increased. Growth index was decreased as hydrophilic polymer mixture ratio was increased. It was reduced about 1/3 and 1/5 compared to that of Control in HP5.0 and HP10.0 treatment plants, respectively. Number of leaves, leaf length, and leaf width were decreased in following order: Control> HP1.0> HP2.5> HP5.0> HP10.0 treatments. There numbers were significantly lower in HP5.0 and HP10.0 treatment plants. Dry weight of shoot and root were decreased as hydrophilic polymer mixture ratio was increased. They were reduced by 1/4 compared to those of Control treatment plants. In addition, visual value was decreased as hydrophilic polymer mixture ratio was increased. Plants grown in HP1.0, HP2.5, and HP5.0 treatments all survived. However, plants grown in the HP10.0 treatment had the lowest survival rate (56%) after 3 months of growing. These results indicate that the advantage of adding hydrophilic polymer to green roof growing media may greater during dry periods. However, the proper mixture proportion of hydrophilic polymer should be determined according to different characteristics of growing media and plant species.

AI기반 스마트 수질환경관리 서비스 플랫폼 개발 (AI-based smart water environment management service platform development)

  • 김남호
    • 스마트미디어저널
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    • 제11권9호
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    • pp.56-63
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    • 2022
  • 최근 기후변화에 의한 수온상승, 과다한 영양염류의 유입 및 하천환경의 변화로 인한 주요하천 및 호소에 대한 조류발생 빈도 및 범위가 증가하고 있다. 이상조류에는 녹조와 적조가 있다. 녹조현상은 물속의 클로로필(Chl-a) 등의 남조류가 과다 성장하여 물의 색이 짙은 녹색으로 변하는 현상으로, 미량의 냄새물질과 독소를 생성하여 수질악화와 식수안전에 대한 우려가 급증하고 있다. 본 연구는 생활주변 환경의 생태하천과 호소에서 측정된 수질정보를 원격지에서 1:1 실시간모니터링 및 제어하기 위하여 디지털트윈의 3D 가상세계를 구축하고, 사물인터넷(IOT) 센서기반의 수질정보 센서측정기를 개발하며, AI의 머신러닝 기반 수집데이터 분석을 토대로 녹조 등 수질오염의 발생원인과 확산패턴을 예측하여 조류경보와 수질예보를 할 수 있는 스마트 수질환경 서비스 플랫폼 구축을 제안하고자 한다.

The Effect of Cultural Factors on Anther Culture in Spring Wheat (Triticum aestivum)

  • Kang, Tae-Jin;Yang, Deok-Chun
    • Plant Resources
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    • 제6권2호
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    • pp.153-158
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    • 2003
  • Effects of shaking, medium consistency and anther density on polyhaploid production in two wheat cultivars, Pavon and Chris, were studied using a modified 85D12 medium. Pavon produced more calli in shaking and more albino plants tban Chris. However, Chris produced threefold more green plants than Pavon in non-shaking treatment. More calli and green plants were derived from non-shaking treatment than those from shaking treatment. Anthers were cultured on both liquid and semi-solid 85D12 media, using two anther densities, 48 and 96 anthers per plate. Although Pavon generally produced more calli and albino plants than Chris, Chris produced more green plants than Pavon. More green plants were derived from semi-solid medium than those from liquid medium. A factor that may affect plant regeneration from anthers is the length of time on initiation medium. Most of the calli for both genotypes were transferred during the first two time periods. Fertility, as measured by seed set, was determined for all surviving regenerated plants. About 24% of Chris and Pavon anther-derived green plants in the experiment of medium consistency and anther density produced seed.

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Yeast Extract: Characteristics, Production, Applications and Future Perspectives

  • Zekun Tao;Haibo Yuan;Meng Liu;Qian Liu;Siyi Zhang;Hongling Liu;Yi Jiang;Di Huang;Tengfei Wang
    • Journal of Microbiology and Biotechnology
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    • 제33권2호
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    • pp.151-166
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    • 2023
  • Yeast extract is a product prepared mainly from waste brewer's yeast, which is rich in nucleotides, proteins, amino acids, sugars and a variety of trace elements, and has the advantages of low production cost and abundant supply of raw material. Consequently, yeast extracts are widely used in various fields as animal feed additives, food flavoring agents and additives, cosmetic supplements, and microbial fermentation media; however, their full potential has not yet been realized. To improve understanding of current research knowledge, this review summarizes the ingredients, production technology, and applications of yeast extracts, and discusses the relationship between their properties and applications. Developmental trends and future prospects of yeast extract are also previewed, with the aim of providing a theoretical basis for the development and expansion of future applications.