• 한국식품저장유통학회지
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• 제6권1호
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• pp.37-42
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• 1999

The equilibrium moisture content(EMC) of Shiitake mushroom is and important factor because it has a close relationship to storage and drying problems. The determination of the EMC for Shiitake mushroom was made in atmospheres of various constant humidities at four different constant temperatures and the fitting of the five selected EMC models were performed with the experimental EMC data. The desorption equilibrium moisture contents for Shiitake mushroom were increased as the temperature was decreased and the relative humidity was increased. The significant difference of the equilibrium moisture content was appeared between the cap and the stipe of Shiitake mushroom. The Henderson-Thompson model was fitter than the others with the experimental data.

• 한국식품저장유통학회지
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• 제4권2호
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• pp.115-122
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• 1997

This experiment was hocused on the improvement of postharvest management of fresh shiitake to increase the marketing duration. the respiration rate of fresh shiitake at 2$0^{\circ}C$ was ranged from 395mg to 551mg CO2/kg/hr depending on the cultural condition. The rapid precooling is considered as one of the most important postharsvest management to remain shiitake quality. The optimum temperature for precooling and storage was -3$^{\circ}C$ because the occurrence of physical damage on frozen tissue at below -5$^{\circ}C$. Frozen storage at -3$^{\circ}C$ had benefits to minimize weight loss, browning induction at gill tissue and consumption of stored materials where as storage at $0^{\circ}C$ appeared not to be adequite for the extension of marking duration. Frozen shiitake was succesefully thawed when exposed to RH 40-50% at below 1$0^{\circ}C$.

• Mycobiology
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• 제36권1호
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• pp.74-76
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• 2008

To obtain basic information on the biochemical property of basidiospores of shiitake mushroom (Lentinula edodes), the ability of producing extracellular enzyme was assessed using a chromogenic plate-based assay. For the aim, amylase, avicelase, $\beta$-glucosidase, CM-cellulase, pectinase, proteinase, and xylanase were tested against monokaryotic strains generated from forty basidiospores of two different parental dikaryotic strains of shiitake mushroom, Sanjo-101Ho and Sanjo-108Ho. These two parental strains showed different degree of extracellular enzyme activity. No identical patterns of the degree of enzyme activity were observed between monokaryotic strains and parental strains of the two shiitake cultivars. The degree of extracellular enzyme activity also varied among monokaryotic strains of the two shiitake cultivars. Our results showed that dikaryotic parental strains of shiitake mushroom produce monokaryotic basidiospores having very diverse biochemical properties.

• 한국균학회지
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• 제39권1호
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• pp.44-47
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• 2011

전라남도 장흥군 일대에서 재배 중인 표고골목에 대량으로 발생한 해균을 육안과 현미경관찰 및 ITS (Internal Transcribed Spacers) 분석한 결과, 줄버섯(Bjerkandera adusta)인 것으로 확인되었다. 줄버섯이 표고골목에 대량 발생한 예는 아직까지 없기 때문에 이 해균에 대한 특성 또한 보고된 바가 없다. 따라서 본 연구에서는 줄버섯에 의해 피해를 입은 골목 내부의 상태와 일부 생리적인 특성 및 표고균에 대한 길항력에 대해 시험을 진행했다. 먼저, 줄버섯은 표고와 같은 백색부후균이기 때문에 골목 내부의 상태가 표고에 의해 부후된 것과 비슷했다. 하지만 표고균에 의해 부후된 골목과 달리 수피 아래 목질 조직에 깨알 같은 점들이 많이 있는 특징을 보였다. 그리고 표고균의 최적균사생장 온도가 $25^{\circ}C$ 내외인 반면에 줄버섯균주는 $30^{\circ}C$에서 최적의 생장을 보였다. $15^{\circ}C$, $20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$에서 표고균주와의 대치배양 결과, 모든 온도조건에서 표고균주보다 균사생장이 빨라 표고균사를 덮었다. 이런 시험결과는 표고골목이 고온에 노출될 경우, 줄버섯의 대량 번식 위험이 높을 뿐만 아니라 일단 줄버섯에 오염되면 표고균이 입을 피해가 큼을 의미한다. 따라서 줄버섯에 의한 피해를 예방하기 위해서는 골목 내부에서 표고균이 빠르게 만연될 수 있도록 배양하면서 여름에는 골목이 고온에 노출되지 않게 관리해야할 것으로 판단된다.

• 동의생리병리학회지
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• 제27권4호
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• pp.409-415
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• 2013

We attempted to determine the action target of Shiitake mushroom extract with a known anti-hyperlipidemic effect in poloxamer(P) 407-induced hyperlipidemia model. We investigated the anti-hyperlipidemic effects of the water extract from Shiitake mushroom on the progress of high fat diet for 4 weeks. Experimental rats were divided into 5 different experimental groups including an normal group (normal diet; n=10), control group (hyperlipidemia; n=10), Experimental group I (hyperlipidemic rats treated with Shiitake mushroom extract (100 mg/kg, PO), n=10), Experimental group II (hyperlipidemic rats treated with Shiitake mushroom extract (300 mg/kg, PO), n=10), and Experimental group III (hyperlipidemic rats treated with Shiitake mushroom extract (500 mg/kg, PO), n=10). It is to analysis changes in body weight, visceral fat weight, blood lipid profiles, HMG-CoA reductase and histological findings. Body weight and epididymal fat weight was not significantly change in experimental groups (p>0.05). The level of total cholesterol, TG, arthrogenic index, and HMG-CoA reductase were significantly lower in experimental groups than control group (p<0.05). These results suggested that the Shiitake mushroom extract administration may act by inhibitory the release of cholesterol related factors and HMG-CoA from the hepatocyte without liver and kidney cell damage in hyperlipidemia rats.

• Journal of Microbiology and Biotechnology
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• 제26권5호
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• pp.909-917
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• 2016

The shiitake mushroom industry has suffered from Camptomyia (gall midges) pest, which feeds on the mycelium of shiitake mushroom during its cultivation. It has been postulated that fungal damage of shiitake bed-logs is associated with infestation by the insect pest, but this is not well understood. To understand the fungal damage associated with Camptomyia pest, various Trichoderma species were isolated, identified, and characterized. In addition to two previously known Trichoderma species, T. citrinoviride and T. deliquescens, two other Trichoderma species, T. harzianum and T. atroviride, were newly identified from the pestinfested bed-log samples obtained at three mushroom farms in Cheonan, Korea. Among these four species, T. harzianum was the most evident. The results of a chromogenic media-based assay for extracellular enzymes showed that these four species have the ability to produce amylase, carboxyl-methyl cellulase, avicelase, pectinase, and ß-glucosidase, thus indicating that they can degrade wood components. A dual culture assay on PDA indicated that T. harzianum, T. atroviride, and T. citrinoviride were antagonistic against the mycelial growth of a shiitake strain (Lentinula edodes). Inoculation tests on shiitake bed-logs revealed that all four species were able to damage the wood of bed-logs. Our results provide evidence that the four green mold species are the causal agents involved in fungal damage of shiitake bed-logs infested by Camptomyia pest.

• 한국버섯학회지
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• 제21권4호
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• pp.200-208
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• 2023

본 연구는 한중 FTA 이후 신선 표고버섯의 수입량이 감소한 원인을 살펴보기 위해 신선 표고버섯 수입량에 대하여 접종배지 수입량과 환율을 이용하여 계량경제적 방법론으로 분석하였다. 분석자료는 2009년 1월부터 2022년 12월까지 월별 시계열 자료이다. 분석 결과, 신선 표고버섯 수입량을 감소시키는 주요 원인 중 하나는 접종배지 수입량으로 나타났다. 한중 FTA에서 접종배지는 관세를 감축하는 양허대상이다. 따라서 시간이 지남에 따라 관세감축이 이루어지면 수입가격 또한 하락하면서 가격 경쟁력을 가지게 된다. 또한 한중 FTA 원산지 규정에 따라 수입 접종배지에서 생산된 표고버섯은 국내산으로 인정받는다. 따라서 낮은 수입가격을 바탕으로 가격 경쟁력을 가진 수입 접종배지를 이용한 표고버섯의 생산이 중국산 신선 표고버섯을 수입하는 것보다는 매력적일 것이다. 이러한 결과는 VAR 모형을 분석한 결과에서도 같았다. 다만, 신선 표고버섯 수입량의 동태적 변화에서는 접종배지 수입량 변화의 충격이 표고버섯 수입량을 증가시킬 수 있다는 사실을 확인할 수 있었다. 그 원인은 수입산 접종배지가 오염되어 폐기처분에 따른 생산량 감소 또는 국산 접종배지의 신선 표고버섯 생산량이 감소한 것이라고 추론할 수 있다. 그러나 명확한 원인을 판단하기 위해서는 접종배지의 원산지에 따른 신선 표고버섯 생산량을 관측하고 통계 자료를 구축하는 것이 필요하다.

• 한국식품과학회지
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• 제27권6호
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• pp.852-859
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• 1995

Vacuum cooling were carried out for freshness keeping of shiitake mushroom. Shiitake mushroom was cooled within 30 minutes from $20.5^{\circ}C$ to $0.5^{\circ}C$ by vacuum cooling, and then temperature drop of $6.6^{\circ}C$ per weight loss of 1% was taken place during precooling. Weight loss, surface discoloration and softening were reduced by precooling. Judging from organoleptic properties such as cap opening, discoloration, texture and off-flavor, shelf-life of precooled mushroom was lengthed by 20% than that of non-treated mushrooms. Considering effect of packing material on freshness of shiitake mushroom after precooling, weight retention, hardness and organoleptic properties of mushroom packed with PVC wrap were superior to those packed in carton box.

• 한국식품영양학회지
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• 제30권4호
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• pp.742-748
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• 2017

This research aimed to improve the healthy properties of puffer fish broth, which has been utilized in Korean and Japanese food. Various healthy foods such as garlic, onion, mushroom, and cauliflower were added as ingredients to pufffer fish stock, and the antioxidative activity of each stock was measured by assaying the DPPH and ABTS radical scavenging activities, reducing power and amount of polyphenol. Shiitake was the most effective in increasing the antioxidative activity of puffer fish stock. The high antioxidative activity of shiitake mushroom seems to be correlated with the amount of polyphenol content in puffer fish broth. The antioxidant activities of puffer fish stock increased proportionally with increasing amount of added shiitake, which in turn was due to the increased amount of total polyphenol in the stock.

• 동의생리병리학회지
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• 제27권2호
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• pp.239-245
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• 2013

In in vitro study, the anti-platelet aggregation effect of Shiitake mushroom extract was examined by measuring the collagen induced platelet aggregation and the DPPH radical scavenging. In in vitro study, anti-thrombotic effect of Shiitake mushroom extract was examined using the carotid artery thrombosis rat model. Carotid artery thrombosis rat model was made by 35% $FeCl_3$ treatment. After that, we investigate thrombus weight and blood flow. In platelet aggregation test, the extract significantly inhibited platelet aggregation in a concentration dependent manner(p<.001). Also, extract increased DPPH radical scavenging activity in a concentration dependent manner. Extract significantly inhibited thrombus weight to compare with control group. And blood passage time were shorter in the Shiitake mushroom extract supplemented groups than in control group. These results provide experimental evidence that Shiitake mushroom can be used to prevent platelet aggregation and thrombosis, then could apply the clinical diseases such as cardiovascular disease, and so on.