• Mycobiology
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• 제35권4호
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• pp.226-229
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• 2007

To produce fruiting bodies of Oudemansiella mucida, porcelain fungus, on the oak sawdust medium, additives suitable for the mycelial growth and fruiting body formation were screened. In general, the mycelial growth of the three strains of O. mucida used in this study have been good on oak sawdust mixed rice bran of $20{\sim}30%$. The mycelia incubated in potato dextrose broth for 7 days were inoculated on oak sawdust medium supplemented with various ratios of rice bran and incubated for 30 days at $25^{\circ}C$ in the dark condition until the mycelia of O. mucida fully colonized the media from top to bottom. Then, top surface of the media in the bottles were horizontally scratched with a spatula and filled with tap water for 3 hours. To induce the primordial formation of O. mucida, the bottles were transferred to the mushroom cultivating room under 12 hrs of light (350 lux) and dark condition with relative humidity of 95% at $17^{\circ}C$. The primordia of O. mucida were formed on the surface of oak sawdust media after 7 days of incubation. The mature fruiting bodies were observed 5 days after primordial formation. The fruiting bodies O. mucida were formed on oak sawdust medium mixed with 5 to 30% rice bran. However, abundant fruiting-bodies of O. mucida were produced in oak sawdust medium supplemented with 20% rice bran. This is the first report associated with an artificial fruiting body production of O. mucida in Korea.

• 한국유기농업학회지
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• 제13권4호
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• pp.423-433
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• 2005

본 실험에서는 우분과 톱밥의 혼합수준을 달리하여 지렁이 먹이로 이용하였을 때, 지렁이 생육과 증식에 미치는 영향과 지렁이 분립의 생산량 및 화학적 조성을 조사하여 우분의 효율적인 Vermicomposting의 기초자료로 이용하고자 실시하였다. 그 결과를 요약하면 다음과 같다. 먹이의 탄질율은 $20.43{\sim}45.20$으로 톱밥 혼합 수준이 증가함에 따라 탄질비도 높아졌으며 실험기간 동안 지렁이의 생존율은 $97.6{\sim}100%$로 나타났다. 산자수는 톱밥을 30과 40% 혼합한 구에서 각각 899.6과 927.8 마리로 우분 100%구의 769 마리보다는 유의하게 높게 나타났다(P<0.05). 산자중은 $8.00{\sim}14.35g$으로 톱밥 혼합 수준이 높을수록 유의하게 높아져 톱밥 40% 혼합구가 가장 높았다(P<0.05). 지렁이 분립생산은 톱밥 혼합 수준이 높을수록 낮게 나타났으며 소화량은 이와는 반대로 톱밥 혼합 수준이 높을수록 유의하게 높게 나타났다.

• Journal of the Korean Wood Science and Technology
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• 제31권5호
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• pp.15-22
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• 2003

국산 간벌재 3수종을 이용하여 밀도 및 수지첨가량을 달리해서 톱밥보드를 제조한 후 감압 후 상압, 감압·초음파 병행 후 상압으로 20분씩 3반복 함침하여 밀도 및 수지첨가량에 따른 함침 보드의 물성을 측정하고, 함침 시 초음파처리 효과를 조사하였다. 밀도 및 수지첨가량이 증가함에 따라 함침 보드의 밀도, 휨강도 및 브리넬 경도는 증가하였으나, 수지 함침율은 감소하였다. 감압·초음파 병행 후 상압 함침에 의한 함침보드의 밀도, 수지함침율, 휨강도 및 브리넬 경도가 감압 후 상압에 의한 함침 보드 보다 컸다. 보드 함침 시 초음파처리를 병행함으로써 수지 함침율이 증가되어 함침 보드의 물성에 영향을 미치는 것으로 판단된다.

• 한국산업융합학회 논문집
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• 제7권4호
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• pp.419-424
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• 2004

In order to increase the efficiency of the sawdust machine, the helical type drums with an oblique cutting condition (3D) were developed. The preexisting drums have an orthogonal cutting condition (2D) considering of a saw cutter and a wood cutting pattern. Unfortunately, the disadvantages of this type drum are the big cutting resistance, the high cost of a cutting power and the extreme occurrence of a vibration. To improve this shortcoming, the helical type drum with an oblique cutting condition was developed. Therefore, this type drum decreased the vibration and the cutting resistance of the sawdust machine, and also improved the productivity of 30% or more and the porosity of the sawdust.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2004년도 춘계학술대회 논문집
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• pp.88-92
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• 2004

We developed a helical type drum with an oblique cutting condition for sawdust machine. The existing drum has an orthogonal cutting(2D) condition considering of saw cutter and wood cutting pattern. Additional disadvantage of this type include big cutting resistance, high cost of cutting power and extreme occurrence of vibrations. To improve this shortcoming, we developed a helical type drum with an oblique cutting(3D) condition, therefore, this type drum decreased the vibration and cutting resistance of sawdust machine, and also improved productivity and sawdust porosity.

• 한국축산시설환경학회지
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• 제3권1호
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• pp.19-26
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• 1997

Composting has recently become popular as a means of recycling swine manure into products for sale off the farm, but bulking agent(usually sawdust) are expensive and availability is limited. This experiment was conducted to investigate the effect of fly ash as a bulking agent on the composting of swine manure and to analyze the effective substitution rate of fly ash mixed with swine manure for sawdust. Fly ash was able to be substituted for sawdust and the most effective substitution rate are 50% of sawdust. According to the results the advanced research and development are required, the effect of swine manure with fly ash on the soil properties, forage composition and animal performance.

• 한국균학회지
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• 제27권4호통권91호
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• pp.252-255
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• 1999

노루궁뎅이버섯균의 균사생장과 밀도에 가장 적절한 종균배양적 특성을 요약하면 적정온도는 $25^{\circ}C$, pH는 5, 톱밥 배지의 적정 수분함량은 $65{\sim}70%$이며, 주재료는 참나무톱밥, 첨가재료는 밀기울이었다. 또한 적정 첨가재료인 밀기울의 첨가량은 20%, calcium carbonate의 첨가함량은 0.1%이며, magnesium sulfate의 첨가함량은 0.2%, sucrose의 첨가함량은 0.2%이었다.

• 한국안전학회지
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• 제8권1호
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• pp.35-46
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• 1993

This paper was concerned with the risk assessment about oxidizing substances as dangerous goods by burning test method. The sample. which was formed with the heaped cone-shape. was composed of solid oxidant and sawdust. The burning time of each sample was measured under the following various conditions circumstance temperature. mixing ratio of oxidizing substance and sawdust. particle size of sawdust and kinds of sawdust. As a results. the effective combustibility was gained when the sawdust content was 20∼30 wt.% in the sample and the lauan with -30+50 mesh was used. But. although the circumstance temperature increased. burning efficiency of the samples wet$.$e not affect by it. Finally. the average burning times were obtained by considering the weighting factors related on the mixing ratio and the circumstance temperature. And then. it were compared with the combustion risk level and the effects of cation and anion of oxidizing substances as dangerous goods.

• 한국동물위생학회지
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• 제16권2호
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• pp.97-102
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• 1993

This study was performed to survey on the prevalence of swine internal parasites at 12 piggeries being operated by the sawdust fermentative pigsty in Kyongnam central area. To investigate the effects of viability of eggs, larva and cysts, temperatures at the underlayer of the sawdust floor and rooms of pens were taken four times each season for one year. In a pig farms which have been operated by the sawdust fermentative pigsty, eggs of Ascar is suum(8.8%), Trichr is suis(18.3%), Oesophagostomum sp(9.4%), Strongyloides ransomi(1.3%), Hyostrongylus sp(3.8%) and Metastronylus apri(2.3%) were detected from 480 heads of Pigs. Cysts and oocysts of Coccidia(12.7%), Balantidium coli(5.4%) were also detected form 480 heads of pigs. The change of the temperature in the pig room was variable between $13^{\circ}C\; to\; 27^{\circ}C$ accord-ing to outside condition, whereas that in underfloor was consistently stable between $28^{\circ}C \;to\; 31^{\circ}C$ which was strictly suitable for the development of eggs, larva and cysts.

• 한국버섯학회지
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• 제2권4호
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• pp.214-217
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• 2004

소나무잔나비버섯의 톱밥재배를 위한 가장 적정한 종균 배양적 특성을 요약하면 적정온도는 $30^{\circ}C$이며, 적정 pH가 소나무잔나비버섯균은 pH 5이다. 톱밥배지의 적정 수분함량은 60%이며, 주재료는 미송톱밥, 첨가재료는 맥주박이었다. 또한 적정 첨가재료인 맥주박의 첨가량은 20%, calcium carbonate의 첨가함량은 0.1%, sucrose의 첨가함량은 0.1%이었다. LVD의 첨가함량은 0.01%이었다.