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연구보문 : 식물환경 ; 폐가축사체의 농업적 재활용을 위한 가축사체 액상부산물의 액비화 조건 구명
서영진 ( Young Jin Seo ),서동철 ( Dong Cheol Seo ),강세원 ( Se Won Kang ),이상규 ( Sang Gyu Lee ),박주왕 ( Ju Wang Park ),최익원 ( Ik Won Choi ),성환후 ( Hwan Hoo Sung ),강석진 ( Seog Jin Kang ),조주식 ( Ju Sik Cho1 ) 한국환경농학회 2013 한국환경농학회지 Vol.32 No.4
가축사체 액상부산물을 이용하여 액비의 최적조건(미생물, pH, 미생물 주입량)을 조사하였고, 이들 최적 조건하에서 112일간 부숙하여 액비의 품질을 평가하였다. 가축사체 액상 부산물 액비 부숙시 최적 LP 미생물의 주입량은 0.5 mL/100mL이었으며, pH는 7 조건에서 각각 50점으로 완숙판정을 받았다. 최적조건하에서 112일 동안 부숙시킨 액비의 부숙도 는 부숙 후 28일에 50점을 받아 완숙판정을 받았으며, 부숙기 간이 길어짐에 따라 부숙 56일에는 온도가 60℃를 넘어 최고 점인 55점을 받았고, 이후 온도가 조금씩 낮아져 부숙 후 112 일에는 실온조건에 이르렀다. 완숙된 가축사체 액상부산물 액 비의 품질을 평가해본 결과, 최적조건하에서 부숙시킨 액비의 경우에는 T-N, P2O5 및 K2O의 함량이 28일에 가장 높았으며, 시간이 경과함에 따라 약간 감소하는 경향이었다. 또한, 유해성분(As, Cd, Cu, Cr, Hg, Ni, Pb 및 Zn)의 함량은 28일, 56일 및 112일 부숙시킨 액비에서 모두 비료공정규격 기 준치에 적합하였다. 이상의 결과를 미루어 볼 때 가축사체 액상부산물을 농업적 재활용을 위한 액비화 조건은 pH 7조건 에서 LP 미생물을 0.5 mL/100 mL 주입한 경우이다. 하지 만 본 연구에서 비교된 가축분뇨 발효액은 공시재료(가축사체)가 상이하여 향후 가축사체를 이용한 액비의 부숙도 기준이 개선되어야 할 것으로 판단된다. BACKGROUND: Globally, concern about emerging infectious diseases of livestock is growing. For the disposal of the animal carcass, it is necessary to recycle the carcass into an agriculturally usable product. The objective of this study was to investigate the composting conditions of liquid by-product obtained from degradation of animal carcass. METHODS AND RESULTS: Optimum conditions of liquid fertilizer were investigated using different microorganisms, pHs, and volumes of microorganisms (Lactobacillus rhamnosus + Pichia deserticola). Based on the results from the optimum conditions, compost maturity and quality of liquid fertilizer were evaluated for 112 days. The compost maturity of liquid fertilizer were higher in the order of LP(Lactobacillus rhamnosus + Pichia deserticola) > BC(Bacillus cereus) > BS (Bacillus subtilis). The optimum condition under different volumes of LP was injection of 0.5 mL/100 mL. The compost maturity under different pHs were higher in the order of pH 7 > 5 ≥ 9 ÷ 11. The liquid by-product at 56 days after composting was completely decomposed. The concentrations of T-N, T-P and K2O in liquid fertilizer at 56 days were 0.94, 0.17 and 3.78%, respectively, and the sum of those concentrations was 4.89%. CONCLUSION(S): Liquid fertilizer of by-product using pig carcass was decomposed with optimum conditions(LP, pH 7, injection of 0.5 mL/100 mL) in 56 days after composting, and was suitable for official standard of commercial fertilizer.
( Ji Ho Seo ),( Sunmin Kim ),( Eunae Cho ),( Chung Hwan Jun ),( Sun Young Park ),( Sung Bum Cho ),( Chang Hwan Park ),( Hyun Soo Kim ),( Sung Kyu Choi ),( Jong Sun Rew ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: The number of elderly patients diagnosed with hepatocellular carcinoma (HCC) has been increasing because the increase in the longevity of the general population. But there is no proper management based on age stratification in elderly patients. We compared clinical characteristics, outcomes and treatment efficacy, safety between oldest-old (aged more than 85 years), middle-old (aged between 80 and 85 years) and young-old (aged between 75 and 80 years) patients with HCC. Methods: We conducted a retrospective cohort study, from January 2010 to December 2016, at Chonnam National University Hospital. A total of 550 elderly patients whose data included demographics, co-morbidity, etiology of liver disease, presence of cirrhosis, staging of HCC, treatment modality and treatment related adverse event were evaluated retrospectively. Also overall survival was assessed in enrolled patient. Results: Fifty one patients (oldest-old; median 87 years old), 153 patients (middle-old; median 82 years old) and 346 patients (young-old; median 77 years old) were diagnosed with HCC. Both oldest- and middle-old patients, compared to young-old patients had significantly lower rate of alcohol-related disease (13.7% vs 20.9% vs 34.1%, P = 0.001). There were no significant difference in underlying sex, body mass index, presence of co-morbidity, hepatitis C-related disease and stage of HCC. The Child-Pugh class (CPT class A 88.9% vs 84.1% vs 83.6%, CPT class B 11.1% vs 15.9% vs 15.0% and CPT class C 0.0% vs 0.0% vs 1.3%, respectively, P = 0.912) and Model for End Stage Liver Disease score (mean MELD score 7.22±3.34 vs 5.88±3.01 vs 5.77±3.14, P = 0.166) were no significant difference between the patients with active treatment. The modified UICC staging (stage I 5.6% vs 17.1% vs 18.6%, stage II 55.6% vs 46.3% vs 47.3%, Stage III 22.2% vs 24.4% vs 24.8%, Stage IV-A 11.1% vs 6.1% vs 4.9% and Stage IV-B 5.6% vs 6.1% vs 4.4%, respectively, P = 0.826) and Barcelona Clinic Liver Cancer staging (stage 0 5.6% vs 9.8% vs 9.3%, stage A 16.7% vs 17.1% vs 22.1%, stage B 27.8% vs 29.3% vs 24.8%, stage C 50.0% vs 43.9% vs 41.2% and stage D 0.0% vs 0.0% vs 2.7%, respectively, P = 0.878) were no significant difference between the patients with active treatment. Furthermore, there were no difference between the age groups in treatment modality (Surgical resection 0.0% vs 3.3% vs 5.2%, P = 0.166; Radiofrequency ablation 2.0% vs 8.5% vs 11.0%, P=0.113; Transcatheter arterial chemoembolization 21.6% vs 34.6% vs 41.6%, P=0.014; Best supportive care 62.7% vs 40.5% vs 29.2%, P < 0.001), adverse event related treatment (P = 0.731) and disease-free survival days (329 .3±309.1 days vs 271.7 ± 414.2 days vs 357.2 ± 511.6 days, P = 0.336). Multivariate analysis showed that age, performance status, CTP class, MELD score, modified UICC staging, presence of portal vein thrombosis and ruptured HCC are risk factors for mortality. Conclusions: Clinician should make an active treatment in elderly patients with HCC not a age but performance status, liver function and disease status of cancer.
유전치의 polyethylene fiber-post를 이용한 심미수복에 관한 증례 보고
서영주,조태식,김효석,고승백,정현구,이난영 조선대학교 구강생물학연구소 2002 口腔生物學硏究 Vol.26 No.2
In clinical practice, restoration of primary incisors severely affected by caries continues to be a challenge. Not only are these teeth difficult to restore. but the behavior of the patient can affect treatment negatively. An acceptable restoration for maxillary anterior incisors should have matching material color, durability, adhesive cementation that is biocompatible with the pulp, easily and rapidly placed. This Paper describes two cases showing an alternative technique for the construction of completely destroyed upper incisors with polyethylene ribbons for retention and stability for the resin crowns.
잇솔질이 제5급와동수복재의 표면조도와 마모에 미치는 영향
서영희,조규증 慶北大學校 齒科大學 1990 慶北齒大論文集 Vol.7 No.2
This in vitro study was done to evaluate the change of the surface roughness and the degree of wear of restorative materials for class Ⅴ cavities before and after toothbrushing. In this study, Durafill, Clearfil Posterior, Fuji-ionomer, ketac-silver, and Amalgam were used and 5,000 and 30,000 times of tooth-brushing were done using cross-brushing machine. The surface roughness were measured with Profilometer and weight loss were measured with Chyo balance. The results obtained were as follows, 1. The surface roughness value was highest in Fuji-ionomer group and lowest in Durafill group at measuring before and after toothbrushing(p<0.01). 2. The surface roughness were increased after toothbrushing in all groups except Amalgam group(p<0.01). 3. In all groups, there was no significant difference in the surface roughness between after 5,000 and after 30,000 times of tooth-brushing(p>0.05). 4. The percentage of weight loss after toothbrushing was greatest in Fuji-ionomer group followed by Ketac-silver group(p<0.05), and there was no significant difference among Durafill, Clearfil Posterior and Amalgam groups(p>0.05).
전력전자회로의 해석을 위한 소자 및 전동기의 라이브러리 개발
서영수,조문택 명지대학교 대학원 1999 대학원논문집 Vol.3 No.-
The purpose of this paper is to verify the appropriation of power electronics circuit by applying the most powerful and widely used simulator PSPICE and SIMULINK for adapted variable control technics. Power semiconductor macro modeled by SIMULINK such as diode, thyristor, transistor. Loads are modeled by SIMULINK such as a resistor, induction. DC motor and AC induction motor. Furthermore DC motor & AC induction motor are modeled by PSPICE through their algorithms. For proved these modelings accurate, simulation techniques which are generally used in the field of power electronics circuits are adapted in power electronics and systems.
Co-계비정질 리본의 자기특성에 미치는 열처리 효과에 관한 연구
조치현,신용진,문현욱,서강수 明知大學校 産業技術硏究所 1993 産業技術硏究所論文集 Vol.12 No.-
This thesis describes the effect of annealing on the magnetic properties of Co-bsaed amorphous. The basic composition of the chosen samples were Co82Si2B15 of zero magnetostriction. The sample was melted in the quartz tube with 0.5[mm∮) nozzle. and the single roll technique was used to make a amorphous ribbon, under Ar-gas pressure 0.6〔kg/cm2] and ro11 speed 28[m/sec]. The average width and thickness of sample ribbons 2.4[mm] and 45(㎛). The sample ribbons were annealed to improve the magnetic properties at temperature of 325,350,375,400 and 450℃ respectively, for 15,30,45,60 and 120 [min] at each temperature. And I have measured high per meability of 8,000∼ 13,000 through the annealed amorphous ribbons. Especially, when the amorhpous samples were annealed at 325 for 45min, the permeability of the ribbon was 13,589. Consequently. I had effects of the improvment of permeability and the average loss at the low-frequency region.
조용주,이상욱,구영필,서만식 釜山大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.56 No.-
마찰과 미끄럼 마멸에서 표면 거칠기의 특성에 대한 효과는 실험적으로 볼-디스크 마멸 시험기를 가지고 연구되어졌다. 실험은 서로 다른 하중, 미끄럼 속도, 그리고 윤활유 점도 조건하에서 산술평균값, skewness, kutosis를 변화시켜 수행되었다. 음의 값을 가지는 더 낮은 skewness 또는 더 높은 kutosis의 표면조도를 가진 같은 상술평균 값에 대하여 더 낮은 마찰을 가지는 경향이 있다. The effect of characteristic of surface roughness on friction and sliding wear was studied experimentally with ball-on-disk type wear tester. The test was conducted with specimens those have varying arithmetic mean value, skewness and durtosis under the condition of different load, sliding speed and lubricant viscosity. The surface of the lower skewness in negative value or the higher kurtosis tends to have low friction for the same arithmetic mean value.
GTO다이리스터에 대한 미시적 모델링과 회로 시뮬레이션
서영주,김영춘,조문택 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-
An accurary G.T.O thyristor model which is oriented computer analysis and design of GTO thyristor circuits was derived. The model accuracy is resulted from the application of the concept of the extended Ebers-Moll model which is based on modeling of fundamental physical processes is closed forms individully. Since thyristors are the p-n-p-n semiconductor device, physical processes in the junction space charge regions such as minority carrier injection. and recombination and generation of free carrier, and those in the bulk regions such as base transport and storage of injected minority carriers are taken into account and represented by the circuits elements. The simulated results shows the sufficient accuracy and completeness of the model such that the forward blocking peak in DC characteristic, and dv/dt and gate turn-on and turn-off the thyristor dynamics were accurately simulated.
서영민,이영원,김덕환,조성환,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2008 動物醫科學硏究誌 Vol.15 No.1
A 7 years old intact male Maltese dog with masses on the neck region, intraabdominal and popliteal region was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Neck and popliteal masses were symmetrical. Right neck mass size was 4 cm in width, 3 cm in length and 3 cm in height and left neck mass size was 3.5 cm in width, 3 cm in length and 3 cm in height. This case was diagnosed as the multicentric lymphoma by physical examination, laboratory examination, radiography, ultrasonography, CT, fine needle aspiration and histopathologic examination. The dog followed by treatment with L-CHOP protocol. The dog revealed that complete remission duration(CRD), first remission duration(FRD), second remission duration(SRD) and survival time was 7days, 115days, 99days and 214days, respectively.