• 대한수의학회지
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• 제30권3호
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• pp.261-270
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• 1990

한국 재래산양의 위장관 내분비세포를 면역조직화학적으로 관찰하였던 바 5-HT, somatostatin, Gas/CCk, glucagon, chromogranin, PP 면역 반응세포들이 동정되었다. 한국 재래산양의 위장관에 있어서 이들 면역반응세포의 부위별 분포와 출현빈도의 특징은 다음과 같다. 5-HT 면역반응세포는 제 4 위 및 유문부에서 보다 대장과 소장에서 더 많이 출현하였다. Somatostatin면역반응세포는 대장과 소장에서 보다 제 4 위와 유문부에서 다수 출현하였다. Gas/CCk 면역반응세포는 유문부에서 가장 다수로 분포하였으며 기타 부위에서는 소수로 출현하였다. 대장과 소장에서는 중등도의 glucagon 면역반응세포가 관찰되었으나, 제 4위와 유문부에서는 소수로 관찰되었다. Chromogranin 면역반응세포는 전 위장관에서 골고루 그리고 아주 많이 출현하였다. PP면역반응세포는 대장에서 중등도로, 회장에서 소수로 분포하였다. Insulin 면역반응세포는 전 위장관에서 관찰할 수 없었다.

• 대한바이러스학회지
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• 제27권2호
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• pp.217-225
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• 1997

PCR amplication using the primers for gag, pol and env genes in BLV (bovine leukemia virus) proviral DNA and syncytium assay were carried out for the Korean native goats experimentally infected with bovine leukemia virus to investigate pathogenesis of BLV in the goats, and to establish a model animal for BLV infection. The oligonucleotide primers used in PCR revealed very high specificity. The minimal amount of FLK-BLV cellular chromosomal DNA to detect the integrated BLV proviral DNA was 10 ng. The peripheral blood lymphocytes from the goat infected with BLV were examined at regular intervals by PCR amplification and syncytium assay. Pol or gag genes were detected in none of three infected goats at the 1st week post-infection (p.i.). At the 4th week p.i., one of three goats showed the amplified gag gene. Thereafter detection rates for the genes were increased, indicating that the BLV proviral genes were integrated in all of the lymphocytes from three goats, at the 16th weeks p.i., when it was evident in syncytium assay that the lymphocytes from all of three goats were infested with infective BLV. Investigating the tissues from the necropsied goats at the 8th month p.i., the amplified BLV proviral genes and infective BLV were detected in all of the peripheral lymphocytes from three infected-goats. Among various tissues examined, the amplified BLV proviral genes were observed in spleen and superficial cervical, mandibular and retropharyngeal lymph nodes, and the infective BLV, in superficial cervical and mandibular lymph nodes. It was assumed that the Korean native goat was quite susceptible to BLV infection, indicating that the goat could be a good model animal for BLV.

• 대한수의학회지
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• 제40권4호
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• pp.665-670
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• 2000

The present study was undertaken to investigate the morphological characteristics of the suprachiasmatic nucleus (SCN) of the Korean native goat by cresyl violet stain. The SCN was located ventrolateral to the third ventricle and dorsal to the optic chiasm. This nucleus was showed carrot form in longitudinal section. Its size was 1.8 mm in length, 0.9 mm in maximum height and 1.6 mm in maximum width. In coronal sections, the SCN shaped very thin plate in rostral part, but it was changed to sweet-potato form in middle part, and ornamental jade form in caudal part. The size of SCN was larger in caudal part than in rostral part. The size of the neuron of SCN was about $10{\mu}m$ in diameter with round or oval shape. The boundary of SCN was not firmly defined in caudal part because the neurons were dispersed into the hypothalamic region. It is concluded that the SCN of the Korean native goat has a morphological characteristics.

• 대한수의학회지
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• 제36권1호
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• pp.23-29
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• 1996

This study was carried out to identify the gross anatomical and radiographic characteristics of the nasolacrimal system of the Korean native goat. The results were as follows : The nasolacrimal system are composed of two lacrimal ducts, two lacrimal, canaliculus, one lacrimal sac and one nasolacrimal duct. The nasolacrimal duct was divided into proximal, middle and distal portion. The nasolacrimal duct took a straight course to be paralleled with nasal bones and opened close to the nostril on the medial surface of the alar fold. The diameter of lacrimal punctum, the length of eyelid margin to lacrimal punctum, the length of canaliculus and the diameter of lacrimal sac were 0.82~0.90mm, 1.06~1.54mm, 5.65~6.30mm and 1.77~2.06mm, respectively. The length of proximal, middle and distal nasolacrimal duct were 36.84~40.00mm, 23.53~24.31mm and 14.55~14.73mm, respectively. The diameter of the orifice of nasolacrimal duct, the length of lateral margin of nostril to orifice of nasolacrimal duct and the length of dorsum to orifice of nasolacrimal duct were 1.29~1.33mm, 12.97~12.53mm and 15.24~16.11mm. The skull index of Korean native goat was not significantly different from the length of nasolacrimal duct.

• Asian-Australasian Journal of Animal Sciences
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• 제21권7호
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• pp.947-953
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• 2008

We studied genetic diversity and relationships among Mongolian goat populations on the basis of microsatellite DNA polymorphisms. DNA samples from eight populations (Bayandelger, Ulgii Red, Zavkhan Buural, Sumber, Zalaajinst White, Erchim Black, Dorgon, and Gobi Gurvan Saikhan) from geographically distinct areas of Mongolia were analyzed by using 10 microsatellite DNA markers. Since the 10 markers were highly polymorphic, the genetic characteristics of these native goat populations could be estimated. Genetic diversity within populations, as estimated by the expected heterozygosities, was high, ranging from 0.719 to 0.746, but genetic differentiation between populations was low, representing only 1.7% of the total genetic variation. The results suggest that Mongolian native goat populations still have a semi-wild genetic structure reflecting traditional Mongolian nomadism and the short history of artificial selection. The genetic relationships among the populations were not clear in the neighbor-joining tree generated from the modified Cavalli-Sforza chord genetic distances. By using principal components analysis, the five core populations of Mongolian native goats (Bayandelger, Ulgii Red, Zavkhan Buural, Sumber, and Dorgon) and the populations crossed with Russian breeds (Zalaajinst White, Erchim Black, and Gobi Gurvan Saikhan) were distinguished. There was no correlation between genetic relationships among the populations and the geographical distribution of the populations.

• Asian-Australasian Journal of Animal Sciences
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• 제7권4호
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• pp.555-561
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• 1994

This paper presents results from a study of the body composition and sensory characteristics of female weaner goat meat. A completely randomized $3{\times}3{\times}2$ factorial design was used. Factors were genotype (Thai native; TN, 75% TN $\times$ 25% Anglo-Nubian; AN and 50% TN $\times$ 50% AN), feeding {grazing only, low (1.0% BW/d) and high (1.5% BW/d) concentrate supplementation and parasite control (undrenched and drenched)}. It was shown that there was no effect of genotype on body components and dressing percentage. However, TN and 75% TN $\times$ 25% AN kids had significantly (p<0.05) higher muscle to bone ratios (4.20% and 4.20%, respectively) compared with 50% TN $\times$ 50% AN kids (3.88%). Kids on grazing only had significantly (p<0.01) higher muscle percentage (64.12%) than did kids in low (61.30%) and high (60.62%) supplementary feeding program, but there was no significant (p>0.05) difference between low and high supplementary feeding groups. Kids offered supplementary feeding had significantly (p<0.01) higher percentages of total fat, intermuscular fat, pelvic fat and kidney fat than those of grazing only. Kids offered supplementary feeding had significantly (p<0.05) higher muscle to bone ratios and significantly (p<0.01) higher muscle plus fat to bone ratios compared with those of grazing only. This may be due to significantly lower (p<0.01) bone contents (14.95, 14.17 and 16.8% for kids offered low and high supplementary feeding and grazing only, respectively. There was no significant difference in sensory characteristics of goat meat between genotypes or feeding groups.

• 한국동물위생학회지
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• 제16권1호
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• pp.57-64
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• 1993

This survey was performed to report rare outbreak of liver cirrhosis in Korean native goat (KNG) which was died of Yangpyeong's goat farm on Feb. 1992. The examination for the KNG was carried out by clinical signs, necropsy and various lab-oratory test including parasitic, bacterial and histological test. The KNG looked jaundice, ascite, hemorrhage of lumen, abomasum and intestine, and brownish smooth cirrhotic liver at necropsy. Histological examination for liver revealed considerable proliferation of connective tissue and piecemeal necrosis which was caused by chronic active inflammation in interlobules and intralobules. There were atrophic micro and macro nodules which were sur-rounded by connective tissue. The lobular structure lack almost all central vein. The portal areas appearred proliferation of bile ducts, blood vessels and connective tissues. These connective tissue infiltrated heavily with plasma cells, Iymphocytes and histocytes. Histological examination for brain proved to be hepatic encephalopathy by virture of congestion and edema in cerebral medullary. From these results were demonstrated miked nodular, active, postnecrotic liver cirrhosis.

• Animal cells and systems
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• 제3권3호
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• pp.269-273
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• 1999

The distribution and relative frequency of somatostatin-immunoreactive cells in the pancreas were studied during developmental stages (fetus, neonate, 1-month-old, 6-month-old and adult) of the Korean native goat by immunohistochemical methods. Somatostatin-immunoreactive cells were detected in the exocrine of all ages, in the endocrine portions (pancreatic islets) from the neonate, and in the pancreatic duct of the 1-month-old. The relative frequencies of these cells in the pancreatic islets increased with age. However, there were no age-related changes in the relative frequencies of somatostatin-immunoreactive cells in the exocrine and pancreatic duct. Generally, they were distributed in the interacinar spaces, the epithelium of the pancreatic duct, or dispersed in the peripheral zone of the pancreatic islets in all ages. However, clusters consisting of 3-4 cells were also found in the subepithelial connective tissues from the 1-month-old. In addition, the distributions in the endocrine portions of the adult were divided into two patterns: 1) they are dispersed in the marginal regions with moderate or low frequencies, or 2) in the inner zone with high frequencies.

• Journal of Nutrition and Health
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• 제11권3호
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• pp.37-42
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• 1978

Actomyosin and myofibril were extracted from Korean native Goat muscle with the Weber-Edsall solution. ATPase activities and physiochemical properties were measured. The results obtained were as follows; 1) Mg-activitied ATPase activity of actomyosin and myofibrill from Korean native Goat muscle exhibited a common biphasic response, a typical ATPase pattern, that is high at a low ionic strength and low at a high ionic strength. Actomyosin showed high activity than myofibrill. 2) Mg-activited ATPase activity of actomyosin from muscle increased extraction time 24 hours. 3) EDTA-enhanced ATPase activity of actomyosin was greater than myofibrill and low at the low ionic strength, high at the high ionic strength. The difference of the activity were shown great broad pattern at the after 0.3M KCI concentration. 4) Effect of EGTA on-ATPase activity of myofibrill and actomyosin from muscle was measured, the Mg-ATPase activity was markedly depressed. 5) Solubility of actomyosin from muscle began to solubilize at KCI concentration of 0.28M and solubilized completely at the KCI concentration of 0.3M.

• 대한수의학회지
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• 제38권3호
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• pp.488-496
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• 1998

Somatotropes, mammotropes and somatomammotropes of the Korean native goat hypophysis were studied by double immunoelectron microscopy using antisera to growth hormone(GH) and prolactin(PRL), and protein A-gold particles of different sizes. Mammotropes were round or oval in shape, and contained round and electron dense secretory granules. The size of secretory granules was variable from 460nm to 680nm in diameter. Somatotropes were elliptical or triangular in shape and the oval nucei were located eccentrically at the periphery of the cell. Secretory granules of the cell were oval in shape and clearly distinguished from round granules of mammotropes. The size of granules was 320~680nm in diameter, smaller than that of mammotropes. Somatomammotropes contained round or oval secretory granules. The granules had intermediate size between somatotropes and mammotropes. Some of granules contained both GH and PRL, while the others contained only one of them.