• The Korean Journal of Zoology
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• v.13 no.1
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• pp.21-25
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• 1970

The present paper deals with the results of the experiments, in which the resistibility to NaCl in whole develomental stages is examined by the emergence rate and the effects of NaCl on the SD action in Drosophila melanogaster. The four SD strains and one mutant strain(cn bw)are used and NaCl media are prepared y adding NaCl at a concentration of 1.0M, 0.7M, 0.5M, 0.3M, 0.1M, and 0.0M to the standard media for the present investigations. The results are given below. 1. The emergence rate (resistibility to NaCl) is not significantly different among strains but strikingly different among concentrations of NaCl. 2. The emergence rate decreases as the concentration of NaCl increases; the four SD strains are considerably resistible to the NaCl from a concentration of 0.0M to 0.3M but are susceptible from 0.5M or higher concentrations of NaCl. 3. No eggs are hatched from the culture media containing a concentration of 1.0M NaCl. This suggests that the SD strains are not resistible to NaCl at a concentrations of 1.0M or higher. 4. The difference in k values is not signficant among strains and also among concentrations of NaCl. Thus the SD action is not affected as far as once emerged from the culture media whether containing NaCl or not.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.89-94
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• 2018

Recently, interest and necessity for the insect industry has been increasing. Insects, which are referred to as the second food, are being used in various fields. Interest in mass production of insects has been increasing in various fields, and the need for research on environmental analysis for them is also increasing. In some countries in other developed countries, automated breeding systems have been developed that incorporate IoT. However, it is limited to be applied to many kinds of insects, and the price is so expensive that it has not been utilized in farm households. Therefore, we have carried out a study to make an optimal system that can be used practically in a farmhouse. Protaetia brevitarsis used for medicinal and edible purposes. It automatically checks the moisture of sawdust medium, which has the greatest influence on the environment of the slugs, which is the third larva of the grasshopper, and informs the result through the LED. It is applied to the environment to create an optimal breeding environment. I want to make it.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.287-288
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• 2001

해양미세조류인 Isochrysis galbana는 그들의 우수한 영양적인 특성, 특히, 필수영양소 중 고도불포화지방산의 함량이 높아 어류뿐만 아니라 패류, 갑각류의 유생사육 시먹이로서 널리 사용되고 있다. 그러나 이들의 먹이로써 공급하기 위한 기존의 먹이생물 배양기술은 획일적 인 배지의 선택, 단순한 환경조건 (pH, 온도, 빛의 세기, 기체공급속도)등으로 인해 낮은 세포농도 밖에 키울 수가 없다. 이는 먹이확보를 위해 배양 공간을 그 만큼 넓게 차지하게 되며, 이로 인한노동력의 증가와 시설비의 증가는 결국 생산비의 증가를 초래한다. (중략)

• Journal of Bio-Environment Control
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• v.29 no.4
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• pp.480-480
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• 2020

• Korean Journal of Plant Resources
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• v.16 no.1
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• pp.1-7
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• 2003

Three strains(CHO-7208, CHO-7845, CHO-7846) of the Cordyceps were used for mass production by artifical cultivation with Allomyrina dichotoma larva. The mycelium length of Cordyceps mititaris on PDA was grown to 25 ${\pm}$ 2mm(CHO-7208) and 26${\pm}$ 21mm(CHO-7845) and 16 ${\pm}$ 2mm (CHO-7846) for 13days cultivation. The larva of Allomyrina dichotoma reared with starch, wheat flour and rice. The best rear material were starch. The formation of fruitbody on media were possible with CHO-7208 and CHO-7846. The fruithbody length of CHO-7208 on A.dichotoma media were 51 ${\pm}$5mm for 27 days culture. And then fruitbody length of CHO-7846 on same media were 56${\pm}$ 5mm for 27 days culture. The larva of A.dichotoma media was excellent fruitbody formation of C. mititaris.

• Korean Journal of Environmental Biology
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• v.19 no.2
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• pp.173-181
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• 2001

To find the appearance period and distribution of Edwardsiella tarda which causes severe damage to flounder (Paralichthys olivaceus) farms in Jeju-do, the rearing seawater (inflow, rearing water, outflow) and internal organs of flounders from 5 flounder farms were examined from June, 1997 to May, 1998. The number of bacteria in seawater was counted by plating the seawater on DSSS (Double Strength Salmonella-Shigella) agar plates or by plating after cultivation of bacteria. Bacteria in internal organs were counted by plating series of dilution of homogenized organ. The results are summarized as follows. E. tarda was detected in inflow seawater of five flounder farms in July, September and November, 1997 and February, March, April of 1998. In the rearing water and outflow water, the bacterium was detected throughout the year and the number of bacteria was much higher in summer than any other seasons. A large number of E. tarda in the internal organs were detected at farm B where a track-shaped tank was used, which has the characteristics of low circulation rate and bad discharge of excrement and residuals. In contast, none of E. tarda was detected at farm A where high circulation rate and good discharge of organic materials were applied. A few number of E. tarda at farm E were detected at the same condition as the farm A. A large number of E. tarda was observed in liver and intestines among the internal organs, and the number was higher from June to September in summer.

• The Korean Journal of Mycology
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• v.34 no.1
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• pp.29-33
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• 2006

To develop environmentally friendly bio-materials for animal feed, the potential of using mushroom was studied. Adding Flammulina velutipes cultivation media wastes (FCMW) has shown beneficial effects on broiler meat quality and production cost because of the $10{\sim}20%$ saving in feeds for broiler chicken. However, differences proximate composition between FCMW and commercial broiler chicken feed were observed. FCMW had higher contents of crude fat (6.2%) and crude fiber (13.7%) than the commercial broiler feed which had crude fat and crude fiber of 4.0%, and 6.0%, respectively. But FCMW crude protein contents were lower (12.2%) than those in commercial broiler (19.0%). Adding $5{\sim}10%$ of FCMW to broiler chicken feed increased amino acid concentration upto $33{\sim}38%$ in the meat, but adding more than 20% decreased amino acid concentration.

• Journal of Practical Agriculture & Fisheries Research
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• v.6 no.1
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• pp.116-135
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• 2004

This study was conducted to investigate effects of spent composts of Se-enriched mushrooms as the dietary Se source on muscular Se deposition and plasma glutathione peroxidase (GSH-Px) activity in the finishing Hanwoo steer. Twenty Hanwoo steers were used in the experiment and they were divided into four groups in a randomized complete block design with five replicates. Treatments were four levels (0.1, 0.3, 0.6 and 0.9ppm as fed basis) of dietary Se from the combination with spent composts of Se-enriched mushrooms and/or Se non-enriched mushrooms, in which each treatment was formulated with corn and corn gluten meal and so forth. Treatment diets were fed to Hanwoo steers for 90 days until the slaughter. Dry matter intakes had no significant differences among treatments and there were no significant differences for performances such as total BW gain and ADG among treatments. The Se concentration in blood was linearly increased with increasing dietary selenium levels and reached a plateau level after 8 weeks (p<0.001). Plasma GSH-Px activities had the similar trends to blood Se concentrations by showing that the increased dietary Se level significantly increased plasma GSH-Px activities of both total and Se-dependent (p<0.001). Muscle Se contents of Se-supplemented groups were linearly increased by 1.35 ~ 1.68 folds compared with the control group (0.1ppm; 0.273㎍/dry g) and especially those of the hind legs for 0.9ppm treatment showed the highest Se content as shown 0.457㎍ per dry gram (p<0.01) corresponding to approximately 70% increase of the control group. Se retention rate in the muscle of dietary Se originated from spent composts of Se-enriched mushrooms was estimated of maximum approximately 30% and dietary Se content showed the significant correlation with plasma GSH-Px activities and muscle Se contents (p<0.01). Accordingly, Se present in spent composts of Se-enriched mushroom as the dietary Se source not only had great bioavailabilities showing higher blood Se concentration and plasma GSH-Px activities, but also increased Se deposition in the muscle for Hanwoo beef cattle.

• Journal of Animal Science and Technology
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• v.51 no.3
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• pp.241-248
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• 2009

Metabolic trial with 3 fistulated sheep was conducted in a 3 $\times$ 3 Latin square design and feeding trial with 24 Hanwoo steers in 12 month of age for 20 months was conducted to investigate the replacing effect of rice straw with fermented spent mushroom (Flammuliua velutipes) compost (FSMC) on fermentation characteristics, ruminal effective degradabilty and whole tract digestibility of nutrients in sheep, and to examine the growth performance of Hanwoo steers. Experimental diets for the metabolic trial with sheep were commercial concentrates and rice straw in the ratio of 70 : 30 (CON, DM basis). Same concentrate with 30% FSMC and 70% rice straw (FSMC-30) and 60% FSMC and 40% rice straw(FSMC-60). Diets for Hanwoo steers in three treatments were same as for metabolic trial in replacing ratio of rice straw with FSMC. pH of rumen fluid in sheep was not affected by FSMC. Ammonia-N content in the rumen fluid was highest in the sheep fed FSMC-60 at 3h (P<0.045). The CON diet increased (P<0.001) acetate proportion at 1h and 3h post feeding compared to FSMC-60 diet while propionate proportion was highest in the sheep fed FSMC-60 diet for all the sampling times (P<0.027~P<0.002). Increased proportion of butyrate was observed at 30 min prior to feeding (P<0.031), and 1h (P<0.011) and 6h(P<0.039) post feeding from sheep fed FSMC-30 diet compared to those from sheep fed other diets. Effective degradability in the rumen was not influenced by experimental diets. Whole tract digestibility of crude protein (P<0.031) and neutral detergent fiber (P<0.006) tended to be increased in the sheep fed CON diet while corresponding values were lowest in the sheep fed FSMC-60 diet. Total body weight gain of Hanwoo steers for 8 months was not different among diets, thus daily body gain was not influenced by the experimental diets.

• Journal of Veterinary Clinics
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• v.8 no.2
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• pp.147-152
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• 1991

Trichophyton mentagrophytes was described as a primary cause of mycotic dermatitis in two young goats housed together in a humid, ill-ventilated and unhygienic byre. The diagnosis in both the cases was established on the detection of fungal element in the skin scrapings by potassium hydroxide technique and isolation of the pathogen in pure growth on mycological medium at 30$^{\circ}C$. The lesions were found on the face of one kid and on the neck and ear of another one. Two adult goats housed in the same enclosure were found to be free from this disease. Further, there was no evidence of ringworm in the goat owner and his family members. Genetic crossing of both the isolates on modified sunflower seed medium indicated that they belonged to (―) mating type. Hair performation test revealed the keratolytic activity of both the strains of T. mentagrophytes. The public health significance and chemotherapy are also discussed. The question of source of infection could not be emphatically established.