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광물질 첨가제가 한우 번식우 바닥의 화학적 성분, 미생물 성상 및 가스 발생량에 미치는 영향
주영호,이성신,노현탁,최정석,정승민,최성운,김삼철 경상대학교 농업생명과학연구원 2021 농업생명과학연구 Vol.55 No.4
본 연구는 미네랄 첨가제가 한우사 바닥에 미치는 영향을 조사하였다. 실험은 경남 진주시 소재 한우 번식우 농장에서 실시하였다. 우방당 미네랄 첨가제를 5 ㎏ 첨가하였으며, 시험구로는 무첨가구(CON); bentonite 시험구(BN); illite 시험구(IL); 및 fly-ash 시험구(FA)로 두었다. 각각의 시험구로 4개의 우방을 이용하였으며, 우방당 5마리 한우 암소를 공시하였다. 미네랄 첨가제를 처리한 후 각 우방당 5곳에서 0, 7, 14, 21 및 28일에 우분을 채취하였다. 샘플은 건물, 발효특성, 미생물 성상 및 가스 발생량 분석에 이용되었다. 전 기간 동안 건물과 acetate 함량은 미네랄 첨가제에 의한 영향은 나타나지 않았다. 무첨가구에서 7, 14 및 28일에 유기물 함량은 가장 높았고(p<0.05), 조회분 함량은 가장 낮았다 (p<0.05). IL 시험구에서는 14, 21 및 28일에 총 질소 함량이 가장 높았고(p<0.05), IL, BN 및 FA 시험구에서는 각각 14, 21 및 28일에 무첨가구보다 대장균이 낮았다(p<0.05). FA 시험구에서는 28일에 살모넬라 수가 가장 높았다(p<0.05). IL 시험구에서는 28일에 암모니아 발생량이 가장 높았고 (p<0.05), 황화수소는 전기간 동안 검출되지 않았다. 28일간 결과값을 평균하였을 때, 무첨가구에서 유기물 함량이 가장 높았고(p<0.05), 조회분 함량이 가장 낮았다(p<0.05). IL 시험구에서 총 질소 함량이 가장 높았고(p<0.05), BN 시험구는 ㏗가 가장 높았다(p<0.05). 대장균 수는 IL 시험구에서 가장 낮았고(p<0.05), 살모넬라 수는 무첨가구 보다 IL과 FA 시험구에서 더 낮았다(p<0.05). 따라서, 본 연구에서 광물질 첨가제는 분 중 가스 발생량에는 영향을 미치지 않았으나, 병원성 미생물인 대장균은 illite와 fly-ash 처리 시에 억제되는 효과가 있었다. The present study investigated effects of mineral additives on Hanwoo manure in barns. The present study was conducted in Hanwoo cow Farm. The manure in barns was applied with mineral additives at 5 ㎏/barn following: without additives (CON); bentonite (BN); illite (IL); and fly-ash (FA). Each treatment used 4 barns as replication and each barn contained 5 cows. After mineral additives were spread, the manure in barns was sub-sampled from 5 sides of pen at 0, 7, 14, 21 and 28 days. The sub-samples were used for analyses of chemical compositions, fermentation characteristics, microbial counts and gas emissions. The concentrations of dry matter (DM) and acetic acid were not affected by mineral additives on all days. CON barn had highest concentrations of organic matter (p<0.05) but lowest concentrations of crude ash (p<0.05) at 7, 14 and 28 days. IL barns had highest concentrations of total N (p<0.05) at 14, 21 and 28 days. IL, BN and FA barns had lowest Escherichia coli (E. coli) than CON barn (p<0.05) at 14, 21 and 28 days, respectively. FA barn had highest Salmonella (p<0.05) at 28 day. IL barns had highest concentrations of ammonia-N gas (p<0.05) at 28 day. On other hand, hydrogen sulfide gas was not detected on all daysz. In the mean of results for 28 days, CON barn had highest concentrations of organic matter (p<0.05) but lowest concentrations of crude ash (p<0.05). IL barn had highest concentrations of total N (p<0.05) and BN barn had highest ㏗ (p<0.05). E. coli was lowest (p<0.05) in IL barn and Salmonella were lower (p<0.05) IL and FA barns than CON barn. In the present study, the mineral additives did not affect the gas production of cow manure, but the pathogenic microbes such as E. coli were inhibited by illite and fly-ash.
주영호,조광환,이건명,Ju, Young-Ho,Jo, Gwang-Hwan,Lee, Gun-Myung 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.9
A method by which the system parameter matrices can be estimated from measured time data of excitation force and acceleration has been studied. The acceleration data are integrated numerically to obtain the velocities and displacements, and the systm parameters are estimated from these data by solving equations of motion. The characteristics of the method have been investigated through its application to simulated data of 1 DOF and 2 DOF systems and experimental data measured from a simple structure. It was found that the method is very sensitive to measurement noise and the accuracy of the estimated parameters can be improved by averaging the repeatedly measured data and removing the noise. One of the main advantages of the parameter estimation method is that no a priori information about the system under test is required. The method can be easily extended to non-linear parameter estimation.
주영호,황수민,박상헌,정광윤,Ju, Young Ho,Hwang, Soo Min,Park, Sangheon,Jung, Kwang-Yoon 대한기관식도과학회 2013 大韓氣管食道科學會誌 Vol.19 No.1
Foreign bodies in the oral cavity and pharyngolarynx are frequently observed accidental cases in the otolaryngological fields. Most foreign bodies can be recognized and removable with the manipulation of endoscopes and various instruments. However, foreign bodies that penetrate the oral cavity and oropharynx to appear as a tongue mass are rare. Therefore, such cases easily can be misconceived as tongue tumor at first, so it must involve a more thorough search utilizing such aids as computed tomography. Depending on their location and size, their removal may involve surgical intervention. The authors experienced such a rare case of an elderly male patient, presenting as tongue mass. We hereby report this case along with the relevant literature.
미생물 첨가와 사일로 밀도가 총체벼 사일리지의 영양소 함량, 발효특성 및 호기적 안전성에 미치는 영향
주영호 한국초지조사료학회 2022 한국초지조사료학회지 Vol.42 No.2
The present study investigated effects of microbial additives and silo density on chemical compositions, fermentation indices, and aerobic stability of whole crop rice (WCR) silage. The WCR (“Youngwoo”) was harvested at 49.7% dry matter (DM), and ensiled into 500 kg bale silo with two different compaction pressures at 430 kgf (kilogram-force)/cm2 (LOW) and 760 kgf/cm2 (HIGH) densities. All WCR forage were applied distilled water (CON) or mixed inoculants (Lactobacillus brevis 5M2 and Lactobacillus buchneri 6M1) with 1:1 ratio at 1x105 colony forming unit/g (INO). The concentrations of DM, crude protein, ether extract, crude ash, neutral detergent fiber, and acid detergent fiber of whole crop rice before ensiling were 49.7, 9.59, 2.85, 6.74, 39.7, and 21.9%, respectively. Microbial additives and silo density did not affect the chemical compositions of WCR silage (p>0.05). The INO silages had lower lactate (p<0.001), but higher propionate (p<0.001). The LOW silages had higher lactate (p=0.004). The INO silages had higher yeast count (p<0.001) and aerobic stability (p<0.001). However, microbial counts and aerobic stability were not affected by silo density. Therefore, this study concluded that fermentation quality of WCR silage improved by microbial additives, but no effects by silo density.