• Korean Journal of Veterinary Research
• /
• v.30 no.3
• /
• pp.261-270
• /
• 1990

The gastrointestinal endocrine cells of the Korean native goat were studied immunohistochemically, and 5-HT-, somatostatin-, Gas/CCK-, glucagon-, chromogranin- and PP- immunoreactive cells were revealed. The characteristic findings of the regional distribution and relative frequency of these immunoreactive cells in the gastrointestinal tract of the Korean native goat were as follows. 5-HT-immunoreactive cells were more numerous in the small and large intestine than in the abdomen stomach. Somatostatin-immunoreactive cell were more numerous in the abdomen stomach than in the small and large intestine. Gas/CCK-immunoreactive cells were concentrated very numerously in the pyloric region with a few in the other regions. Moderate numbers of glucagon-immunoreactive cells were found in the small and large intestine, but a few of them were found in the abdomen stomach. Very numerous chromogranin-immunoreactive cells were detected throughout the gastrointestinal tract. PP-immunoreactive cells were observed moderate numbers in the large intestine with few in the ileum. No insulin-immunoreactive cell was found in the gastrointestinal tract.

• Korean Journal of Poultry Science
• /
• v.42 no.4
• /
• pp.275-283
• /
• 2015

A consumer survey was conducted for the subject of a total of 503 housewives in Korea, with the questionnaires on the quality attributes for Korean native chicken. The responding results collected were used for the importance-performance analysis of the quality attributes involved in production, processing, distribution, and consumption of Korean native chicken. The quality attributes with both relatively high importance and performance ("keep up the good work") were chicken origin, shelf life, freshness, and safety issues, while those with high importance but low performance ("concentrate here") were chicken breed certification and refrigerated/ frozen state. Respondents were also interested in lean meat and protein content of the chicken meat. In the aspect of eating quality attributes, chewiness was the most important one. The survey shows tenderer, chewier, and more flavorful chicken meat will be preferred and a new chicken breed with those eating quality attributes needs to be developed.

• Journal of Pharmaceutical Investigation
• /
• v.30 no.3
• /
• pp.159-166
• /
• 2000

Kunitz-type soybean trypsin inhibitor (SBTI) and chondroitin sulfate (A, and C type) were conjugated using sodium periodate method. And the physicochemical, pharmacokinetic properties and immunogenecity of the conjugates (Chon-A-SBTI or Chon-C-SBTI) were characterized. We expected the conjugation using chondroitin sulfate to reduce the immunogenecity and to improve the pharmacological effect. As the results, the mean molecular weight of the conjugate highly increased. After I.V. injection of the radiolabeled conjugates or native SBTI into mice, it was found that native SBTI showed rapid elimination from plasma, whereas Chon-A-SBTI and Chon-C-SBTI were slowly eliminated. Organ distribution of the two agents at 30 min after I.V. injection was different : Chon-A-SBTI or Chon-C-SBTI accumulated to a large extent in the liver (13% in Chon-A-SBTI and 16% in Chon-C-SBTI), whereas native SBTI was taken up more rapidly by the kidney (107% dose/g of tissue) and excreated into the urine (26%). In addition we evaluated the therapeutic value of the conjugates by using the sublethal septic shock model caused by pseudomonal elastase and tested the immunogenecity by passive cutaneous anaphylaxis shock (PCA). The conjugates were more effective than native SBTI against pseudomonal elastase induced septic shock in guinea pig. In case of the conjugates, the pharmacological and therapeutic effect lasted over 3 hours long. In immunogenecity test, both of the conjugates showed the reduction of their immunogenecity, especially Chon-A-SBTI looked most effective.

• Korean Journal of Agricultural Science
• /
• v.47 no.3
• /
• pp.667-672
• /
• 2020

It is well known that intensive selection caused a decline in reproductive performance in dairy cattle. Interestingly, the reproductive performances including fertility and calving interval of Korean native beef cattle have declined in the last 20 years, suggesting that a breeding program focusing on carcass weight and intramuscular fat may affect the reproductive physiology in Korean native beef cattle, too. In this study, we analyzed the calving interval (CI) and selection index (SI) based on genome-wide association studies (GWAS) of Hanwoo cows for seven years (2013 - 2019). Multiparous cows (4.5 ± 0.11) were analyzed, which were bred by artificial insemination (AI). We first examined the distribution of the AIs and calving dates. About 40% of the AIs were carried out in May to June and October to December; subsequently, calving was observed from March to April and August to October, respectively, indicating the cows were seasonally bred. No correlation between CI and SI was found (y = 0.0459x - 17.64; R² = 0.0356), but the ratio of cows with a positive SI was higher in the longer CI group compared to the shorter group, suggesting that the selection for meat quality and quantity may affect the reproductive performances. In addition, the average value of SI was - 3.42 in the CI < 400 while + 5.79 in the CI > 400 although the values were not statistically significant. However, our results suggest that reproductive indices such as fertility and CI should be considered for sustainability in the Hanwoo breeding selection program.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.15 no.1
• /
• pp.133-140
• /
• 2012

The study of Arundinaria munsuensis Y. Lee to this day was limited to the field of morphological species classification since its first discovery at Jiri mountain in the late 1990s. This native plants, one of Korean endemic species found in Jiri Mt. necessitates further studies about its use as revegetation plants or groundcover plants in urban areas. This study was launched from this need followed by summaries of results below related to its usage. This targeted species is a native Korean species which its natural distribution on the subalpine zone has merit for the wide range of climatic adaptation. Also, the coverage rate reached 78.3% in three years mostly by rhizome growth with an expectation of full coverage in four years providing less maintenance needs after planting. The net price for the construction of pot seedling methods of this plants is relatively economical than other normal revegetation construction methods. For these reasons, drilling for the plants on cut and fill soil slopes driven from pot seedling adapts Arundinaria munsuensis Y. Lee as efficient revegetation plant. Total construction cost for pot seedling work($30cm{\times}30cm$) of Arundinaria munsuensis was approximately 21,000won which is in reasonable price range when compared to other revegetation construction methods of disturbed slopes. As a native Korean plant, Arundinaria munsuensis has wide range of climatic adaptation with less maintenance requirement after planting. This study may suggest a strong possibility of Arundinaria munsuensis as a pot planting material in sloped area.

• Journal of Veterinary Clinics
• /
• v.39 no.4
• /
• pp.156-161
• /
• 2022

The objective of the present study was to assess the prevalence, occurrence pattern, and clinical outcomes of transfixation pinning and casting (TPC) for fractures in Korean native calves, and to identify the advantages of the procedure. The study investigated 52 cases of bone fractures documented from January 2017 to December 2020. Hindlimb fractures (72%) were the most common in bone fractures (n = 50). The distribution of fractures was highest in the tibia (n = 15), followed by the metatarsal (n = 12), femur (n = 9), radius/ulna (n = 8), metacarpal (n = 3), humerus (n = 3), mandible (n = 1), and caudal vertebrae (n = 1). All cases were diagnosed via radiographic evaluation. Closed fractures (86%) were the most common, followed by open fractures (14%). Surgery was performed on 34 calves using intramedullary pin (IM pin), TPC, cross pin, flexible wire (F-wire), and/or plate fixation. The rest of the calves were treated with external coaptation (n = 12) or were not treated (n = 6). Subsequently, 24 calves with follow-up records were evaluated in the bone fracture cases (n = 50). Bone union was observed in 15 (62%) calves; 3 (12%) calves showed non-union; 4 (16%) calves were dead after surgery; and 2 (8%) calves were euthanized at the owner's request. Among the 24 follow-up surgery cases, the most successful cases were tibia fractures (75%) surgically treated using TPC and/or IM pin. These findings suggest that TPC surgery is effective in the management of fractures in Korean native calves.

• Korean Journal of Plant Resources
• /
• v.8 no.2
• /
• pp.175-182
• /
• 1995

This study was carried out to investigate the check shelling distribution of Lindera erythrocarpa Makino in Kanghwa Island, MT. Suri, Kyunggido and MT. Kaya, Chungchongnamdo. The results were as follows : The total distribution area of Linedra erythrocarpa where are Jeondeung temple and Jugsu temple Kanghwa Island, MT. Suri, Kyunggido and MT. Kaya, Chungchongnamdo was 344.4ha and the total number of Linedra erythrocarpa was 3,224. The total number of femle Linedra erythrocarpa was625(22.2%) except the seedlings under 2cm of DBH(Diameter breast of height). For the estimation of tree age by counting of tree rings, the regression equation was Y=1.79X+9.47($R^2$=0.83, DBH=cm). The soil acidity of stands studied was $pH4.6{\sim}pH5.8$. And the soil acidity of Seoul was $pH4.2{\sim}pH4.5$ So for the Planting Linedra erythrocarpa in Seoul area, the soil acidity of planting area should be changed to $pH4.6{\sim}pH5.8$. The flower size of and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. The length of petiole of male and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. The length of petiole of male and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. And the number of flowers per flowering bud of male and female were 13.4, 11.2, respectively. The flowering period of Lindera erythrocarpa in Suwon was 21 days from May 2 to May 22. And The leaf continuing period of Lindera erythrocarpa in Suwon was 203 days from April 7 to October 27. And the fall-foliage color continuing period was 10 days from October 18 to October 27. The fruit continuing period of Lindera erythrocarpa in Suwon was 61 days from September 26 to November 26.

• Proceedings of the Korean Reliability Society Conference
• /
• 2004.07a
• /
• pp.167-175
• /
• 2004

A nonparametric procedure is proposed to test the exponentiality against the hypothesis that one life distribution has a greater residual life times than the other life distribution. Such a hypothesis turns out to be equivalent to the one that one failure rate is greater than the other and so the proposed test works as a competitor to more IFR tests by Kochar (1979, 1981) and Cheng (1985). Our test statistic utilizes the U-statistics theory and a large sample nonpara metric test is established. The power of the proposed test is discussed by calculating the Pitman asymptotic relative efficiencies against several alter native hypotheses. A numerical example is presented to exemplify the proposed test.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2003.11a
• /
• pp.133-137
• /
• 2003

When a light is projected upon a material, part of its radiation energy is absorbed and the rest is reflected or transmitted according to the nature of the material. The molecules of the substance absorbing a light obtains the radiation energy to the wavelength of the light to make photochemical degradation by ultraviolet ray or thermal reactions like physical damage by infrared ray. The degree of damage by radiation energy varies to the substances of materials, the spectral power distribution of the light source and the duration of irradiation. Because the damage brings about a devaluation of material and once damaged, it is irretrievable, it is necessary to minimize the damage and conserve the native quality of a material by a protective lighting system. A measuring system was set up to measure the temperature rise of each sample by infrared radiation from light sources. And the temperature rise and temperature distribution by various infrared lamps were measured with varying time.

• Korean Journal of Veterinary Service
• /
• v.39 no.1
• /
• pp.13-20
• /
• 2016

This study is aimed to find out distribution status of online-market livestock products by purchasing and examining 120 cases of livestock products (seasoned meat: 17, 33 cases of packaged meat, 23 cases of ground meat, 19 cases of ham, 11 cases of sausage, 4 cases of bacon, 1 case of meat processing, 8 cases of Meat extract processed, and 4 cased of Dry storage of meat) at 17 On-line markets from April to August. 2015. We checked the weight of them first, and carried out ingredients test for each of processed meats. And we performed gene screening test on the products which were labelled 'Hanwoo' to investigate that the products were made of Korean native cattle. we also carried out test of identifying domestic animal species on ham, sausage and ground processed products. After weighing all products, we could know that all of them were delivered more than labelled weight or in allowable error. The result values of test which measured level of preservatives, Nitrite, Volatile Basic Nitrite (VBN), and tar Color by the type of processed meat products were in permissible range or not detected. Also, 17 beefs inspected Korean native cattle gene test were confirmed that they were made by real korean native cattle. But 2 cases of Ham, sausage, and ground processed products had difference between label and goods. In this study, we could make a decision that livestock products, distributed in On-line markets, were safe and expect to make higher degrees of hygiene for livestock products seller. Futhermore, we hoped result of this study could be used by basic data for progressive national policy decisions.