산란계 개량에 관한 연구 1 . 순계의 생산능력 비교시험

상병찬,강만석,김동곤,한성욱 ( B . C . Sang,M . S . Kang,D . K . Kim,S . W . Han ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

This experiment was carried out to test performance of the domentic purebred fowl. The purpose of this experiment was to compare the productive performance of the purebred fowl to obtained basic materials for laying performance improvement by means of cross breeding. In this study, 1, 200 chickens was used-that is 6 purebred strains White Leghorns(720 chickens), 1 purebred strain Rhode Island Reds (120 chickens), 1 purebred strain New Hampshires (120 chickens). The results obtained in this study are as follows; 1. The average Viability of brooding, rearing and laying period was best for Rhode Island Reds and E. Strain among White Leghorns. 2. The average body weight at 8 weeks, first egg production days, 500days of age in W. L. was 546.86g. 1431.37g, 1738.34g, respectively, but there was no significant difference among. purebred strains of W. L. 3. The average Sexual maturity of 50% egg production was 170.58 days in W. L., but R. I. R. and S. N. H. were 189.94 days, 182.42days, respectively. There was significant difference at 1 % level among Strains. 4. The average hen-housed egg production was 214.16 eggs in W. L., but R. I. R. and S. N. H. were 214.22 eggs, 196.74 eggs, respectively. There was significant difference at 1% level among Strains, but the highest hen-housed egg production (231.84 eggs) was E. Strain among strains. 5. The average egg weight was 54. 48g in W. L, but R. I. R. and .S. N. H. were 56.12g, 54.90g, respectively, The highest egg weight (57.69g) was Coronial Strain of W. L. among strains. There was significant difference at 1 % Level among strains. 6. The average feed requirement was 3.01 in W. L. but R. I. R. and S. N. H. were 3.23, 3.52, respectively the highest feed requirement (2.79) was Coronial Strain of W. L. among strains. There was significant difference at 1 % level among strains. 7. On the basis of the results of this study, the productive performance was best for C. D. E. strains among W. L. and R. I. R.

한우 포유모우의 산유량및 유조성분에 관한 연구 1 . 포유모우의 산유량 추정방법 확립에 관한 연구

강수원(S . W . Kang),정연후(Y . H . Chung),정창화(C . H . Chung),나승환(S . H . Na),손용석(Y . S . Son),백동훈(D . H . Baik) 한국축산학회 1989 한국축산학회지 Vol.31 No.3

This experiment was conducted to establish the estimating of dam`s milk producing capacity which forms the basis of Korean Native Cattle improvement for 3 years from 1982 to 1984. Four methods, including weight difference of the calf before and after nursing, hand milking and machine milking were compared with a new milking while the calf nurses, which the good points from the existing methods were extracted and then were developed. Fifty nine heads of nursing cow were tested to investigate dam`s milk yield. dam`s milk composition by the new milking method for 3 years from 1985 to 1987. The results of this experiment are summarized as follows: 1. This new method was made to use a portable vacuum·operated bucket milker in two quarters of each cow`s left or right udder while the calf suckles two quarters of his or her dam`s right or left udder. On this method. cows and calves were seperated at 8:00 am and at 5:00 pm the calves allowed to nurse. Cows and calves remained seperated over night. At 8:00 am and 5:00 pm the following day, the calves allowed to nurse one udder half while the rest was milked by machine. 2. On the comparison with methods estimating dam`s milk yield, the method by calf-weight difference before and after nursing wasn`t exact and good method in estimating dam`s milk yield and composition because not only this method was indirectly estimated by calf`s weight gain but also milk sample could not be taken. And also, the method by hand milking and machine milking could be surveyed only 60 days and 4 to 10 days, respectively, because dam`s milk yield was rapidly decreased with passing the milking day. However, by the new method, milking could be completely done without failure for 180 days and samples for analyzing the milk composition could be taken more easily and exactly than any other method. 3. Daily average and total milk yield of fifty nine heads investigated by this new method for 180 days was 3.48 and 625.8kg, respectively. 4. In the milk composition, total solids, far, protein, lactose and ash content was 14.21, 4.64, 4.07, 4.21 and 0.89 percent, respectively.

수집형 감자 수확기 개발을 위한 굴취·이송 요인실험

이상희 ( S. H. Lee ),김영근 ( Y. K. Kim ),강태경 ( T. G. Kang ),김성우 ( S. W. Kim ),최용 ( Y. Choi ),전현종 ( H. J. Jun ),최일수 ( I. S. Choi ),현창식 ( C. S. Hyun ) 한국농업기계학회 2016 한국농업기계학회 학술발표논문집 Vol.21 No.2

감자는 국내에서 재배되는 주요 밭작물로 감자의 소비량은 증가하고 있지만, 재배면적은 2000년 29,400ha에서 2014년 22,000ha로 감소하고 있는 추세이며 생산량 또한 2000년 704,6000톤에서 2014년 590,000톤으로 감소하고 있다. 현재 감자의 수확작업은 굴취기를 이용하여 굴취한 후 인력으로 수집하는 형태로 감자 생산 총 노동시간 58.0hr/10a 중 수집 작업에 소요되는 시간이 17.1hr/10a에 달하며 농촌 노동력 감소와 고령화로 인해 수집형 감자 수확기 개발 요구가 높아지고 있다. 따라서 본 연구에서는 감자의 생력재배(Labor saving cultivation)를 높이기 위해 수집형 감자수확기개발을 위한 굴취날 각도 및 이송속도에 따른 요인실험을 수행 하였다. 수집형 감자 수확기는 트랙터 부착형으로 굴취날 각도 3수준(20, 23, 26°), 이송속도 3수준(0.3, 0.4, 0.5m/s)으로 조절할 수 있도록 제작하였다. 굴취날은 각도 별로 3개를 제작하여 날을 교체하는 방식으로 제작하였고, 시험은 평창 감자밭에서 이루어졌으며 시험포장의 토성은 양토였다. 굴취율은 3m구간 굴취 후 굴취된 개수와 미굴취 감자의 개수를 비교하였으며 3반복 측정 하였다. 이송속도는 모터 회전수를 제어할 수 있는 모터 컨트롤러를 따로 제작하여 기체는 정지시키고 이송부만 작동하며 실험하였다. 이송속도 별로 1회에 시료 50개를 투입하여 총 3반복 실험하였으며 표피손상과 형태가 파손된 것을 손상으로 간주하였다. 실험에 사용된 감자의 물성은 크기와 무게를 조사하였으며 평균 가로 75.4±6.26mm, 세로 62.5±5.3mm, 높이 81.7±7.67mm, 무게는 230.7±45.6g이었다. 수집형 감자 수확기의 굴취 및 이송 요인별로 시험하여 감자 굴취율, 이송손상 및 수집손상을 조사한 결과 굴취날 각도에 따른 굴취율은 감자수집에 미치는 영향이 적은 것으로 나타났다. 굴취날 각도 20, 23°에서는 약 99%로 수집되었으며, 26°의 굴취각에서는 모두 수집되었다. 또한 이송속도에 따른 이송부 및 수집부의 감자손상 및 손상률 시험결과 이송부손상률은 0.3m/s에서 2.67%, 0.4m/s에서 3.33%, 0.5m/s에서 6.67%로 0.5m/s의 이송속도에서 손상율 증가폭이 크게 상승하였다. 수집부 손상율 또한 0.3m/s에서 2%, 0.4m/s에서 2.67%, 0.5m/s에서 약 6.67%로 0.5m/s의 이송속도에서 증가폭이 크게 상승하였다. 따라서 본 연구의 수집형 감자 수확기는 작업속도, 감자손상 및 손상율을 고려할 때 0.4m/s의 이송속도에서 수확 시 가장 적절할것으로 판단하였다.

터키種 잎담배 生産에 關한 硏究

盧載榮,鄭元采,安長憲,卞珠燮,姜信寓 충북대학교 엽연초연구소 1974 煙草硏究 Vol.2 No.-

I.Influence of deficient or excessive supply of soil moisture. The variety used in this study were Turkish varieties (Smyrna, Samsun, Zichna and Xanthi). Soil moisture content were 30%, 45% and 60% to maximum water-holding capacity for whole growth period. This experiment was carried out to study on the influence of soil moisture to growth and physiology of Turkish varieties. The results are summarized as follow ; a. Dry weight of Samsun and Zichna were-increased at 45% soil moisture content, but Smyrna and Xanthi at 60%. In every soil moisture treatmennt, there were significant difference between D plot and M, W plot but there were no significant difference between M plot and W plot. b. Percentage of dry matter of Smyrna was higher then those of the other varieties in the D plot and W plot. c. Leaf area was increased ill the Samsun of which process was slightly late. In every soil moisture treatment, M plot and W plot were higher than D plot. d. Dry weight per unit leaf area of Smyrna and Zichna were higher than that of Xanthi and Samsun. e. Percentage of dried up leaves was the W plot, and lower at the D and M plot. Smyrna was lower at M plot, Zichna at D and M plot, Xanthi at D plot, but Samsun was no difference among plots. f. In the number of harvested leaves, Smyrna was increased in order W>M>D. In the number of harvested leaves, Smyrna showed difference according to the soil moisture in order W>M>D plot, but Samsun and Zichna showed no difference among each treatments, Xanthi was higher in M plot than D and W plot. From those results, Smyrna showed the highest dry weight on account of the weight of leaf area and percentage of dry weight increased, it was decreased in order Zichna>Samsun Xanthi in the each soil moisture contents. Number of harvested leaves, dried up leaves, leaf area and number of harvested leaves but decreased, percentage of dry matter W treatment increased the number of total leaves, number of dried up leaves, leaf area, percentage of dried up leaves and percentage of dry matter. Yields were the lowest at D treated, there were no difference between M and W treatment. II.Influence of deficient or excessive supply of soil moisture at different growing stages. This experiment was carried out to study on the influence to the growth and physiology according to the soil moisture content during each growth stage on Turkish varieties culture. The varieties used in this study were Samsun, Zichna and Xanthi. The results are summarized as follow; a. Dry leaf weight was decreased in order Zichna>Samsun>Xanthi, there were remakable difference among every variety. In each soil moisture content, weight of dry matter was increased by M and W treated at late stage after MW and MM treated at early and middle stage of growth DWM and MDM plot. Dry leaf weight was decreased at D plot more than M and W plot late stage after early stage was treated by MW and MM. Dry leaf weight was the highest at WWM treate, dthere were high significant difference between varieties and soil moisture contents. b. Percentage of dry matter was decreased in order Zichna=Xanthi>Samsun. In soil moisture treated, it was increased in D treated at the latter stage after MM, MW and WM treated at early and middle stage, but it was decreased by DDM, DWD, MDM, WWD, WMM, and WWM treated. There were high significant interaction between varieties and soil moisture contents. c. Leaf area showed in order Samsun=Zichna>Xanthi. In soil moisture treated, leaf area was increased by WM, MM and MW treated at the middle and latter stage after D treated at early stage, but it was decreased at WWD, WMD, WWM, MWD and MMD treated. d. Dry weight per unit leaf area were no difference among varieties, in soil moisture treated, it was increased by the MMW, MWD, MMD, WMD and DMW treated, weight of per unit leaf area showed significant difference interaction between varieties and soil moisture contents. d. Percentage of dried up leaves showed as follow, Samsun>Xanthi, Samsun=Zichna, Zihna=Xanthi. In soil moisture treated, it was increased by M and W treated at early stage than D treated. f. Number of harvested leaves was decreased in order Xanthi>Samsun>Zichna, there were no difference among soil moisture contents, but appeard high significant difference at the interaction between varieties and soil moisture contents. As the results of this experiment, especially, this experiment will be continue on the influence of soil moisture condition in order to development of home production system.

Antibiotic susceptibility and resistance of Streptococcus iniae and Streptococcus parauberis isolated from olive flounder (Paralichthys olivaceus)

Park, Y.K.,Nho, S.W.,Shin, G.W.,Park, S.B.,Jang, H.B.,Cha, I.S.,Ha, M.A.,Kim, Y.R.,Dalvi, R.S.,Kang, B.J.,Jung, T.S. Elsevier Scientific Pub. Co 2009 Veterinary microbiology Vol.136 No.1

The rates of antibiotic susceptibility and resistance were investigated in Streptococcus iniae and Streptococcus parauberis isolates obtained from diseased olive flounders (Paralichthys olivaceus) collected from fish farms in Jeju Island, Korea. Isolates of S. iniae (n=65) were susceptible to cefotaxime, erythromycin, ofloxacin, penicillin, tetracycline and vancomycin, as demonstrated by the minimum inhibitory concentration (MIC) test. Isolates of S. parauberis (n=86) were highly resistant to erythromycin (58% of the 86 isolates tested) and tetracycline (63% of the 86 isolates tested). Fifty-four isolates of tetracycline-resistant S. parauberis contained the tet(M/O/S) genes, of which 39 and 12 isolates contained the tet(M) and tet(S) genes, respectively, whereas 3 isolates contained both the tet(M) and tet(S) genes. Among the erythromycin-resistant isolates of S. parauberis (n=50) only 14 contained the erm(B) gene. These results suggest that the tet(S) and erm(B) genes of S. parauberis are involved in the acquisition of high-level resistance to erythromycin and tetracycline. Our findings reveal a high rate of antibiotic resistance among strains of S. parauberis and emphasize the need to develop an appropriate vaccine to reduce the use of antibiotics.

1987년 한국에서 발생한 렙토스피라병의 혈청역학적 조사

이증훈,박영수,이우곤,김석용,정선식,우준희,박성광,박경희,송영욱,김선영,기정일,최두혁,강성귀,김주완,최강원,김우열,최명식,최인학,장우현,윤성열 대한감염학회 1988 감염 Vol.20 No.3

Human leptospirosis was an unfamiliar disease in Korea until 1984 that outbreak of leptospirosis occurred among farmers and soldiers after field works for harvesting rice. During that time, Lee and Jo confirmed the first Korean cases of leptospirosis by serological test, isolation of causative agent and autopy findings. Afterward several outbreaks occurred also during autumn especially after flood in every years and some characterisitcs of leptospirosis in Korea such as clinical manifestations, serotypes and seroepidemiological features has been revealed by many investigators. Because of the major mode of transmission between rodents and human is by direct contact with leptospiral urine of rodents or contaminated soil by the urine, leptospirosis in Korea has been primarily a disease of person in occupations heavily exposed to contaminated soil or infected urine such as farmer, army and etc. Therefore it seems that leptospirosis is one of the main communicable diseases to be controlled urgently in Korea, for an agricultural people account for almost half of total Korean people. For clarifying the seroepidemiological patterns of human leptospirosis in Korea by sex, month region and main reacting serovars of L. interrogans among acute febrile disease occurred in 1987, 1,773 patient's sers with acute febrile episodes were tested by microagglutination test using 19 representative strains of leptospiral serogroup as antigen. All of those sera were collected from 10 collaborative clinics located in Kyunggi, Kangwon, Chungbuk, Chungnam, Chonbuk, Chonnam province and Seoul. The results wee summerized as follows. 1) Among 1,773 sera of patients with acute febrile episodes, 219 (12.4%) were seropositive to L. interrogans, 487(27.5%) to R. tsutsugamushi, 241(13.6%) to R.typhi and 160(90.0%) to Hantaan virus. 2) Among seropositives to L.interrogans, the male outnumbered the female, 65% and 35%. 3) For age distribution, 26.9% of seropositives to L.interrogans were fifties, 19.6% were forties, 9.1% were sixties, 5.9% were thirties and 4.1% were twenties. 4) Eighty three percent of seropositives had occurred between September and October in 1987 with a peak in September. 5) Main leptospiral serovars reactive to patient's sera were Icterohaemorrhagiae(54.3%), Canicola(31.0%), CH-48(13.2%), Tarassovi(0.9%)and Cynopteri(0.5%). 6) For regional distribution, 65.8% of seropositives to L.interrogans were residents from Chonbuk, 12.3% were Chonnam, 7.3% were Chungnam, 5.5% were Kyunggi and 1.4% were Kangwon.

우리나라 시송전계통에 적용된 전력계통안정화장치(PSS)의 분석

이상성(S. S. Lee),이선영(S. Y. Li),이영진(Y. J. Lee),정우덕(W. D. Chung),장광수(G. S. Jang),민상원(S. W. Min),박종근(J. K. Park),문승일(S. I. Moon),이홍재(H. J. Lee),이경섭(K. S. Lee),강상희(S. H. Kang) 대한전기학회 2003 대한전기학회 학술대회 논문집 Vol.2003 No.11

Cu-Al-Ni-Ti-Mn 합금의 변태특성 및 기계적 성질에 미치는 가공열처리의 영향

강조원,장우양,양권승,이영수,곽사호,김춘동,백승남 한국열처리공학회 1999 熱處理工學會誌 Vol.12 No.2

The distribution of the second phase, the change of transformation temperature and mechanical properties with thermomechanical treatment conditions were investigated by metallography, calorimetry, EDS, tensile test and fractography in a Cu-Al-Ni-Ti-Mn alloy. The cast structure revealed Ti-rich precipitates(X_L phase) between dendrite arms, which have been identified as (Cu,Ni)₂TiAl intermetallic compounds. By homogenizing above 900℃, the X_L phase was melted in the matrix, while the X_s phase was precipitated in matrix and the volume fraction of it was increased. When hot-rolled specimen was betatized below 750℃, recrystallization could not be observed. However, the specimen betatized above 800℃ was recrystallized and the grain size was about 50㎛, while X_s phase was precipitated in matrix. With raising betatizing temperature, M_s and A_s temperatures were fallen and transformation hysteresis became larger. The strain of the specimen betatized at 800℃ was 8.2% as maximum value. The maximum shape recovery rate could be obtained in the specimen betatized at 800℃ but it was decreased due to the presence of X_s phase with increasing betatizing temperature.

Ciprofloxacin의 각종 감염증에 대한 임상효과에 관한 연구

강경호,송관규,유혜경,강숙경,김민자,박승철,김진호,김대원 대한감염학회 1987 감염 Vol.19 No.4

85 patients 37M and 48F, ranging in age between 18-75yrs(39±16), were treated with Ciprofloxacin at daily odse of 100㎎ bid Ⅳ (49) or 500㎎ bid p.o (30), or combined use (6) Infections included: pneumonia (19) bronchitis (15), pharyngotonilitis (1), GI tract infection (15), acute pyelonephritis (26), cystitis (2), sepsis (6), osteomyelitis (1). Severity and mode of infection were; severe 13, moderate 71, mild 1 and acute form 82, chronic 2, recurrent 1. Duration of symptoms before therapy was 4.8±4.5 days and total dose, Duration of Drug were Ⅳ: 2882±1018㎎ 7.1±2.4 dyas oral: 7167±1858㎎, 7.2±1.9 days Ⅳ and oral: 1600±858㎎/4500±1039㎎⁴±0.9/4.5±1.5 days. Isolated major organisms were; 1) pneumonia (19)-k. pneumonia (7), E. cloaceae (4), S. pneumonia(3), P. aeruginosa (2), 2) Bronchitis (15)-S. pneumonia (8), S. aureus (2), E. cloaceae (2), K. Oxytoca (2). 3) GI tract infection(15)-s. typhi (14), S. parathphi (1). 4) acute pyelonephritis (26)-E. coli (17), P. aeruginosa (4), Enterococcus (2), P. mirabilis (1). 5) cystitis (2)-E. coli (1), P. aeruginosa (1). 6) Sepsis (6)-E. coli (6), K. pneumonia (1). 7) osteomyelitis (1)-S. epidermis (1). Clinical result were resolution (64 case-75%), improvement (16-18.3%), undetermined (1-1.1%) failure (4-4.7%). Therapy result were as follows: 66 case (77.7%) were completely resolved 1 case of undetermined course in CVA with pyelonephritis. 14 case (16.5%) of partial response were 6 cases of RTI, 5 case of UTI, 5 case of thphoid fever underlying idsease; rectal cancer 1 Diabetes mellitus 4). 4 case (4.7%) of failure were 2E. coli pneunonia witn liver cirrhosis, 1 s. epidermis osteomyelitis with lymphoma and 1 enterococcus sepsis. Over all efficacy of therapy was 94.2% in 85 cases. Adverse reaction was observed in 1 patient which was fever and rash.

1989년에 한국에서 발생한 쭈쭈가무시병의 혈청 역학 조사

장우현(W.H. Chang),최명식(M.S. Choi),기선호(S.H. Kee),김익상(I.S. Kim),박찬식(C.S. Park),김익중(I.J. Kim),최강원(K.W. Choi),우준희(J.H. Woo),강재승(J.S. Kang),최두혁(D.H. Choi),김주완(J.W. Kim),김상현(S.H. Kim),이증훈(J.H. Lee),김선영(S.Y. Ki 大韓微生物學會 1990 大韓微生物學會誌 Vol.25 No.3