• Mycobiology
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• v.35 no.4
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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.

• Korean Journal of Organic Agriculture
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• v.13 no.4
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• pp.423-433
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• 2005

This study was conducted to develope efficient vermicomposting using of different mixture ratios of cow manure and sawdust by feeding these to earthworm and then by studying the growth and reproductive efficiency of earthworm, and the chemical composition of worm cast and its production. The results are summarized as follows. C/N ratio of feed was $20.43{\sim}45.20$ and it increased according to the higher proportion of sawdust, and survival of earthworm was $97.6{\sim}100%$. Number of young worms were significantly higher in 30 and 40% addition of sawdust (number of 899.6 and 927.8) than number of 769 of real cow manure treatment (P<0.05). Fresh weight of young worms was $8.00{\sim}14.35g$ and it was significantly higher in 40% addition of sawdust than other treatments(P<0.05). The cast production of earthworm was showed in the tendency of becoming lower in the 40% addition of sawdust than in $10{\sim}30%$ addition of that, but digested matters were significantly higher in $10{\sim}40%$ addition of sawdust than real cow manure treatment(P<0.05).

• Journal of the Korean Wood Science and Technology
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• v.31 no.5
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• pp.15-22
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• 2003

This study was carried out to investigate the properties of sawdust board impregnated with phenol resin according to the density and resin content of board. The sawdust board were manufactured to target densities of 0.4, 0.5, 0.6, 0.7 g/cm³ and resin content of 5, 10, 15, 20% made from Pinus densiflora S. et Z., Larix. kaemferi C. and Pinus koraiensis S. et Z. The impregnation process were executed in two ways, the application of vacuum pressure then followed by atmospheric pressure, and the application of vacuum pressure with ultrasonic vibration then followed by atmospheric pressure. The density of impregnated sawdust board increased as density and resin content of sawdust board increased, but impregnation rate decreased. The density, impregnation rate, bending strength and brinell hardness of sawdust board in impregnated vacuum pressure with ultrasonic vibration then nonpressure were higher than those of vacuum pressure then nonpressure. In this results, the impregnation rate is increased in vacuum pressure with ultrasonic vibration then nonpressure, it has affected the properties of sawdust board impregnated with phenol resin.

• Journal of the Korean Society of Industry Convergence
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• v.7 no.4
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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.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2004.04a
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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.

• Journal of Animal Environmental Science
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• v.3 no.1
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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.

• The Korean Journal of Mycology
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• v.27 no.4 s.91
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• pp.252-255
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• 1999

This study was carried out to investigate the physiological charateristics of Hericium erinaceus in sawdust media. The optimum temperature was $25^{\circ}C$ and the optimum pH was 5. Mycelial growth and density of H. erinaceus was quite good when oak tree sawdust were used as cultural substrates. The best mycelial growth in H. erinaceus were observed when wheat pollard was added as supplement on sawdust substrates. The optimum supplement ratios of wheat pollard and magnecium sulfate were 20% and 0.1% respectively, for H. erinaceus.

• Journal of the Korean Society of Safety
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• v.8 no.1
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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.

• Korean Journal of Veterinary Service
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• v.16 no.2
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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.

• Journal of Mushroom
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• v.2 no.4
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• pp.214-217
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• 2004

This study was carried out to investigate the physiological charateristics of F. pinicola in sawdust media. The optimum temperature in sawdust media was $30^{\circ}C$ in of F. pinicola. The optimum pH was 5 in F. pinicola. Mycelial growth and density of F. pinicola was quite good when birch tree and oak sawdust, respectively were used as cultural substrates. The best mycelial growth in F. pinicola was observed when beer waste was added as supplement on sawdust substrates. The optimum supplement ratios of beer waste and a magnecium sulfate were 20%, and 0.1% respectively. However, optimun supplement ratios of a calcium oxide and a LVD were different as 0.1% in F. pinicola.