全南地方 飼育乳牛에 있어서 繁殖障害의 實態 및 發生要因分析

朴永埈,康炳奎 全南大學校 農漁村開發硏究所 1972 農業科學技術硏究 Vol.6 No.-

A systemic studies for reproductive and nutritional problems to conduct a herd infertility examinations were performed on one hundred and fourty seven cows in Kwang-ju, Chonnam area during the period from June 1 to August 30, 1971. The examination involves evaluation of breeding history and laboratory tests to make an objective diagnosis on nutrio-reproductive syndrome. An analysis of data from a dairy herd with a repeat breeding problems is presented and the purpose of this paper is to discuss some management practices that relate to cattle fertility, some of which are directly applicable today and some that may become available in the future. 1. Total of 147 cows examined were grouped as pregnant(60.5%), anestrus after breeding(10.8%), unknown to conception(15.7%), repeat breeder(10.8%) and others(2.1 %). Evaluation for the breeding history of the herd and the reasons for culling indicated that the repeat breeder was the major problems especially on the large herd (type-A and B farm) than the small one (type-C) in this area. 2. The reproductive histories and results of reproductive examainations were as follows. Calving intervals were 512 days(17.4 months), the interval from parturition to first breeding 91.3 days and postpartum interval to first estrus 52.6 days respectively. Service per conception rate was observed as 1.4, and the 30-60-day and 60-90-day nonereturns were 42.9 and 91.5 per cent. These findings were a sign that cows might not be cycling by 60 days, or that estrus detection was inferior. 3. Tendency towards a frequency of conception and parturition through one year was evaluated, and it was suggested that the problems of summer sterility should be re-evaluated because of the conception rate was low in August to October. On the other hand, natural breeding was frequently used instead of artificial insemination service on the mating system in this area. 4. The mean value of the examined cows for red blood cell count and hemoglobin values were 5.5×10 6 per cmm and 7.8 grams per 100ml of blood. It was markedly noticed that the mean value of red blood cell of the anestrus after breeding group was lower than that of the pregnant group(P<0.05). It seemed to be a anemic condition because of the mean value was relatively low compared with the reported values in other countries. 5. The mean value for total serum protein was 7.3 grams per 100ml of blood and it was observed that unknown to conception group showed the lowest value, and almost all the cows which showed abnormal values belonged to the repeat breeder group. 6. The mean value for serum calcium was 4.5 mEq per liter of blood, which was coincide with the lowest range of the normal value(4.5 to 5.5mEq/L). Significant differences on the calcium contents were observed between the anestrus after breeding(P<0.05) and repeat breeder group(P<0.01) to pregnant group. On the other hand, the mean value for serum inorganic phosphorus was 7.3mg per 100ml of blood, which was the normal value(7.0 to 7.5mg/100ml). The Ca/P ratio was observed as 1.47 as a mean of total examined cows but more than 50 per cent of repeat breeder and unknown to conception groups showed, hypocalcemia. 7. Normal A/G ratio was observed as a mean, but 62 cows(45.6%) were positive by the liver function test(Hayem's and gross reaction), and almost all the positive cows on the test had the abnormal total serum protein values. 8. No significant features were observed among the groups in the mode of internalparasite infection, but the liver-fluke infection was demonstrated in 48 cows(32.6%), and of these 66.7 per cent were positive in the liver function test. 9. Follow-up evaluations on the results of the laboratory tests strongly suggest that the problems of repeat breeder had a tendency to occur more frequently in the large herd (A and B-type farm), and on the other hand, abnormal conditions, especially on the calcium and phosphorus metabolism, observed more frequently in the subsidiary dairy farm management(C-type). 10. With evaluations for maintaining high fertility in healthy herds and illustrated results from a herd on a systemic herd health programs, followings may be pointed out for recommendation. First, it is necessary to consider a countermeasure against the faulty management followed by the tendency of large herd. Second, the feeding and management technic of farmers should be improved not to-produce the nutrio-reproductive syndrome. Third, the poor test results of repeat breeder and unknown to conception groups may be related with. the reproductive disturbances and actions should be taken to increase the reproductive efficiency.

방송활용수업 분석

박석규,전영미 울산과학대학 1995 연구논문집 Vol.21 No.-

본 연구에서는 TV방송매체를 학교현장에 효율적으로 활용할 수 있도록 방송활용수업의 기본개념을 규명하고, 또한 직접 TV방송매체를 수업에 활용하는 교사들을 혼란하게 만들고 있는 자료형 방송활용수업(한국교육개발원의 방송활용수업 모형)과 모델형 방송활용수업(일본의 방송에 의한 수업 모형)의 활용목적, 활용절차 및 활용방법에서 각각의 장단점을 비교.검토함으로써 TV방송매체를 수업에 직접 활용하는 교사들에게 방송활용수업에 대한 이해는 물론 방송교재를 수업에 활용하는 기준을 제공하고자 한다. The main research tasks of the present study was to analyze the instructional instructional model, and methodological features in teaching-learning process of the two types of the instruction using ITV program, i.e. the materials type of the instruction using ITV program and the modeling type of the instruction using ITV program. The main purposes of the present study through these analyses were as follows: (1) To establish the purpose and methodology of using ITV program in classroom. (2) To provide the practical evidences that is useful to solve the selective problems, that is,which type of the instruction using ITV program should be used? The obtained conclusions of the present study were as follows: (1) The type of the instruction using ITV program that could optimize the characteristics and functions of ITV program is the modeling type of the instruction using ITV program. (2) The research movement of the instructional system and design is transformed to cognition paradigm and structural paradigm. Therefore, the proper type of the instruction using ITV program that come up with these trends is the modeling type of the instruction using ITV program. (3) The instruction using ITV program of the foregin countries is transformed to the pararell curriculum of the instruction using ITV program that could foster the ability of monitoring ITV program. Therefore, the instruction using ITV program that could satisfy the pararell curriculum is the modeling type of the instruction using ITV program. (4) The instruction using ITV program is the modeling type of the instruction using ITV program, that could optimize the information processing ability and problem solving ability needed in modern inforamtion society. (5) The instruction using ITV program is the materials type of the instruction using ITV program, that could make learners to acquire knowledge systematically. (6) Researchers of the present study have explored the instruction using ITV program that could be applied to this country. And the new type of the instruction using ITV program explored by the researcher is a comprehensive type of the instruction using ITV program. A comprehensive type of the instruction using ITV program was explored by considering the mothodological weak points and strong points of the materials type of the instruction using ITV program and the modeling type of the instruction using ITV program. A comprehensive type of the instruction using ITV program could foster not only systematic learning of knowledge but also information processing ability and problem solving ability. And a comprehensive type of the instruction using ITV program makes teachers understand students, and make students cognize teachers as the comraders of learning. As though a comprehensive type of the instruction using ITV program explored by researcher dose not use advanced component such as computer and compact disk, it is a type of media-mixture technique, and therefore it can be accomdated freely. In conclusion, Teachers should understand various types of the instruction using ITV program, and should find the most suitable type of the instruction using ITV program that is useful to various instructional purposes. And to be the most effective teacher, they shoule used to every type of the instruction using ITV program.

CTS法에 의한 Bi-Fe-XO系의 混合溶液에서 Bi와 Fe 同時定量

朴永圭,全錫柱 嶺南大鶴校 工業技術硏究所 1978 연구보고 Vol.6 No.1

A simultaneous determination of Bi and Fe in a mixture were studied with ligand XO at PH 2 by CTS method. The composition of Bi-XO complex was confirmed to be 2:1 ratio (metal: ligand), not only by the mole ratio method at maximum wavelength 565mu, but also by the Qr plot which has one a inflection point. In case of Fe-XO complex, the 1:1 complex of metal to ligand was also identified. The determined apparent stability constant of Bi-XO complex and Fe-XO complex were 3.39×10 , 4.37×10 respectively. Fe and Bi were determined by CTS method with the relative error within 2.0%, 3.0% respectively, and also the simultaneous determination of Fe and Bi in a mixture could be satisfied with ligand XO.

알루미나 적층복합체에서 Fe_2O_3 첨가가 알루미나의 입자배향에 미치는 영향

송준호,박훈,정용빈,박상업 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-

Alumina laminate composites with alternating layers of textured and untextured were fabricated by continuous tape casting and pressureless sintering with the addition of Fe_2O_3 known to be influencing on the abnormal grain growth of alumina. Alumina grains in textured layer were aligned with (006) and (1010) plane, and the addition of Fe_2O_3 was influencing on the abnormal grain growth in untextured layer rather than texutured layer. The efffective control of crack propagation was possible through the grain orientation from the observation of crack path between textured and untextured layer.

관동맥 스텐트 삽입후 발생한 스텐트 변연부 박리의 예측인자 및 추가적 치료후 임상적 의의에 관한 연구 : Predictor, Angiographic and Clinical Follow-up after Additional Procedures

두영철,박수종,김재삼,이준호,홍경순,박대균,한규록,오동진,유규형,임종윤,고영박,이광학,이영 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.11

점적층 반응기에서 유체의 흐름 및 압력강하에 관한 연구

성기천,김기준,박영규 대진대학교 생산기술연구소 2000 생산기술연구소 논문집 Vol.3 No.-

This experiment was investigated in the reacter of trickle bed with spherical particles. Flow of fluid and pressure drop were measured and analyzed in the air-water system. The results showed that liquid velocity at trickle-pulse transition increased with increasing packing size, and It decreased with decreasing gas velocity, and that theoretical model proposed was well applicable to predicted flow transition boundary. In the same operation conditions, Flow of fluid was changed with operation mode because of liquid closslinking. Therefore, As the maximum gas velocity increased, Pressure drop increased. Also pressure drop increased with increasing fluid velocity, and It increased with decreasing packing size, and the effect of gas velocity on the pressure drop for higher liquid velocity was less than that for lower liquid velocity in this conditions, Correlations in the flow of fluid and pressure drop can show in terms of Reynolds Number of gas and liquid phase.

평면연삭버어의 가공조건에 의한 영향

이광영,옥철호,서영백,박흥식,전태옥 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2

This study has been carried out to prevent and decrease the grinding burr under various working conditions; number of grinding passes, depth of cut, hardness of the materials and work speed. Grinding wheel is WA grinding wheel and workpieces are SM45C, SS41, SCM23 and STS 304. The results of tained from this study are as follows; The length of gringing burr increased with increasing grinding passes and it has nothing to do with materials and heat treatment. The size of grinding burr increased with increasing grinding depth and feed speed. The size of grinding burr decreased with increased cross setion and of workpiece. According as the hardness of material was increased, the width of grinding burr decreased conspicuously owing to suppression of plastic zone of burr root part.

A Study on the Habitat Use of the Released Red Fox for Daytime

Seung-Hoon Chae,Dae-Ho Jung,Dong-Ju Song,Seok-Beom Kim,Woo-Jin Jeong,Seung-Jun Jeong,Jin-Seok An,Min Kim,Park Yung Chul 강원대학교 산림과학연구소 2017 강원대학교 산림과학연구소 학술대회 Vol.2017 No.11

The fox (Vulpes vulpes Linnaeus, 1758) are an animal belonging to Genus Vulpes, Family Canidae, Order Carnivora. In Korea, the fox are currently in danger of extinction. To prevent extinction from 2011, a restoration project has been carried out centered around Sobaeksan National Park. The most important factor in the successful fox restoration project is the habitat environment of the target species. This study was conducted to be utilized as the data for collecting more data and selecting suitable releasing sites to analyze the environment of the fox released in 2017. A field survey was conducted using the daily coordinates that the fox stayed in the same place for more than 5 days out of the coordinates collected through CDMA attached to the fox during releasing. In the survey area, the daytime habitat environment of released foxes was identified through a site investigation of altitude, slope, incense, topography, land use status, vegetation, shelter type, etc. for a total of 23 coordinate points. However, a food resource survey, which is a major factor affecting foxes’ habitat use, was not performed. As a result of the survey, the use of daily habitat of the fox in 2017 shows they preferred sites of relatively low altitude (100 ~ 300m), gentle slopes (0 ~ 10 °), and sunshine-rich southward directions. It is because the fox seem to have secured their shelter mainly in the villages adjacent to the human houses or roads where vegetable foods and rodents as their main food can be found. This study tried to confirm a habitat utilization pattern of released foxes by investigate the type and their surrounding environment. The most important factor in choosing the range and habitat of the wildlife is the presence and amount of food resources. To this end, it is necessary to elicit more objective and reliable research results on foxes’ habitat use by conducting a further investigation on qualitative and quantitative food resources

Cost-Effective, Green, and Sustainable Solvent Process Engineering for the Commercialization of Sulfide-Based All-Solid-State Batteries

Yung-Soo Jo,Junyoung Heo,Junghwan Sung,Heetack Park,Jun-Ho Park,You-Jin Lee,Yoon-cheol Ha,Doohun Kim,Jun-Woo park 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.11-1

Pharmacokinetic and Bioequivalence Study of Zolpidem Tartate in Healthy Volunteers

( Jun Sung Park ),( Ja Hye Myung ),( Hun Sik Wang ),( Ja Seong Koo ),( Wonk Yung Cho ),( Hee Jun Park ),( Min Soo Kim ),( Jeong Soo Kim ),( Kwang Ho Cha ),( Sung Joo Hwang ) 한국약제학회 2011 Journal of Pharmaceutical Investigation Vol.41 No.3

In this study simple and sensitive high performance liquid chromatographic method using a commercially available column, was developed and validated for the determination of zolpidem tartrate in human plasma. The developed method with suitable validation was applied to a bioequivalence study of two different kinds of zolpidem tartrate. Two different formulations containing 10 mg of zolpidem tartate (CAS: 99294-93-6) were compared in 24 healthy male volunteers in order to compare the bioavailability and prove the bioequivalence. The study was performed in an open, single dose randomized, 2-sequence, cross-over design in 24 healthy male volunteers with a one-week washout period. Blood samples for pharmacokinetic profiling were drawn at selected times during 12 h. The mean AUC0-12h, Cmax, Tmax and T1/2 were 676.6±223.4 ng·h·mL-1, 177.4±34.2 ng·mL-1, and 0.8±0.4 and 3.5±2.1, respectively, for the test formulations, and 640.7±186.6 ng·h·mL-1, 193.0±64.5 ng·mL-1, and 0.9±0.4 and 2.7±0.9, respectively, for the reference formulation. Both primary target parameters AUC0-12h and Cmax were log-transformed and tested parametrically by analysis of variance (ANOVA). 90% confidence intervals of AUC0-12h and Cmax were in the range of acceptable limits of bioequivalence (80- 125%). Based on these results, the two formulations of zolpidem tartate are considered to be bioequivalent.