• Asian-Australasian Journal of Animal Sciences
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• v.4 no.1
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• pp.1-5
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• 1991

Responsiveness of the testis to pregnant mare's serum gonadotropin (PMSG) was studied in immature Nili-Ravi buffalo bulls. Four month old bull calves weighing between 66 to 100 kg raised under uniform condition, were treated with 1000 IU PMSG or vehicle, daily, for six days. PMSG induced an increase in the size of the testis, enlargement of the seminiferous tubules and activation of the spermatogonia. The number of differentiated Leydig cells in the testis of gonadotropin treated animals increased considerably over that of the control testes. A significant increase in plasma testosterone concentrations was observed 24 h following the first injection of PMSG and the levels continued to increase until day 6. In vehicle treated animals plasma testosterone levels remained more or less at pretreatment values. The data suggest that buffalo bull testis is functionally responsive to gonadotropin at an early stage of prepubertal development.

• Journal of Veterinary Clinics
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• v.17 no.2
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• pp.459-463
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• 2000

A 3 year-old male American Pit Bull Terrier in Kwang-Ju, Chonnam was admitted to the Teaching Animal Hospital, Chonbuk National University. He showed convulsive spasms of skeletal muscles, raised tail-head, and rigidity of rigidity. Based on these clinical sign\ulcorner tetanus was suspected Hematological test results showed and WBC value (21 ,800/$\mu$l/) with neutrophils (17.877/$\mu$l) and monocytes (1.744/$\mu$l). The blood chemical values ALT (86 IU/L) and AST (119 IU/L) were elevated. Fecal sample from the dog was cultured in anaerobic chamber. A Gram positive, drumstick shaped bacteria was isolated. The bacteria was identified as Clostridium tetani by biological and biochemical tests. The dog was hospitalized in a quiet place where the light was cut off and treated with penicillin G procaine and phenobarbital sodium. The dog made a complete recovery 25 days after treatment. This Is the first report on C. tetani infection of domestic dog in Korea.

• Journal of the korean veterinary medical association
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• v.20 no.5
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• pp.298-303
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• 1984

Pathological study on the Johne's disease of Korean native bull was conducted at August 1983 in Kyunggi province. 5 years old bull was continued with watery, odourless diarrhea for 6 month and appetite was within normal. Clinicohematological examination o

• Korean Journal of Veterinary Service
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• v.40 no.3
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• pp.201-208
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• 2017

BVDV causes significant infections in ruminants, resulting in reproductive disorders, diarrhea, reduced milk production and enormous damage to farms. In particular, identification and culling of persistent infectious calf is an important task to eliminate infectious nidus in cattle households. However, studies on physiological characteristics of PI bull are still insufficient to understand reproductive effects of BVDV. In this study, one PI bull was confirmed in herd and complete blood analysis was performed. The lymphocyte count of PI at age 4 was below the normal range and the number of WBCs was also in the lower level of normal range in blood. The sperm number produced by PI male becomes lower and the viability of fresh sperm comes to poor with ages (P<0.05). The sperm abnormality was also increased, especially in nuclear vacuoles of head and droplets of midpeace (P<0.05). The PI male becomes infertile due to poor semen quality at age 4. With these results, we concluded that BVDV in PI bull cause decreased sperm cell and abnormality in semen so causes infertility. However, it appears that BVDV could not be transmitted by indirect contact of PI bull, because there was no evidence of BVDV infection in the herd, when regular vaccination program was applied.

• Journal of Embryo Transfer
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• v.21 no.2
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• pp.95-100
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• 2006

Thirty heads of proven bulls were used to identify the effects of mounting conditions (dummy cow vs. teaser bull) on semen characteristics in Hanwoo. Semen was collected from bulls daily two times with 1 h interval every $3{\sim}6$ days for 6 months. Bulls mounted dummy cow (BDC) had higher both the $1^{st}$ and the $2^{nd}$ sperm concentrations than in bulls mounted teaser bull (BTB), resulting in more total sperm number (p<0.05). The total sperm number in the $1^{st}$ collection was the highest in BDC with collection interval of 5 days. Total sperm number in the $1^{st}\;and\;2^{nd}$ collections tended to be more in the BDC of $4{\sim}5$ years old and BTB of $6{\sim}7$ years old. These results indicate that semen collection using dummy cow has a better effect than teaser bull on semen characteristics.

• Journal of the Korea Society of Computer and Information
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• v.15 no.1
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• pp.207-217
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• 2010

It is taken a violent fall of the international stocks market that was an American Subprime Mortgage Situation. The loss rate of individual investor judged than foreigner and institution by bigger thing. Therefore, further scientific and mechanical investment is needed at the stock investment using Internet HTS. This dissertation is stocks profit rate analysis which uses individual engine foreigner Knowledge Base HTS at the Bear Period the Bear Wave Period the Bull Period the Bull Wave Period. Knowledge Based e-friend HTS was Installed. HTS does composite stock exchange index in actuality stock trading and engine's fund earning rate, yield that is abroad comparative analysis using trend line that is HTS tool, MACD, Bollinger Bands, Stochastic slow's function. Usually, each subjects suppose that deal 5 stocks, and comparative study of the profit(loss)rate of the down to earth falling rate and rising rate, by comparing the earning rate of 5 Small capital stocks with 5 medium capital stocks and 5 Large capital stocks during the bear period, the bear wave period, the bull period, the bull wave period has meaning at the making research of the financial IT field.

• Bulletin of the Korean Mathematical Society
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• v.41 no.1
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• pp.19-25
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• 2004

In our previous paper (Bull. Korean Math. Soc. 37(2000), 493-505), we claimed a theorem on a certain subset of a projective space over a finite field (Theorem 3.1). Recently, however, Professor Kato pointed out that our proof does not work if the field consists of two elements. Here we give an alternative proof of the theorem for the exceptional case.

• The Korean Journal of Mycology
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• v.6 no.2
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• pp.11-14
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• 1978

Attempts were made to investigate the sterol components of Boletus aerus Bull. which grows wildly in Korea. Its carpophores were collected in Gyeong-Gi Province and extracted with chloroform and methanol. A sterol was isolated and identified as ergosterol by T.L.C., G.L.C. and chemical tests.

• Korean Journal of Veterinary Service
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• v.30 no.2
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• pp.287-289
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• 2007

Uremia was diagnosed in a slaughtered 20-month old bull. It had no special clinical signs, but many lesions associated with uremia were observed at postmortem inspection. It had a lot of ascites. Kidney, urinary bladder and ureter were enlarged, congested and hemorrhagic, and the incised section of those slightly smelled nasty. However, the precise cause of uremia in this case could not be completely identified.

• Asian-Australasian Journal of Animal Sciences
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• v.22 no.5
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• pp.611-617
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• 2009

This study was aimed at a genetic evaluation of Iranian Holstein cattle for milk and fat yields and calculating daughter yield deviation (DYD) of bulls. The data file that was used in this research included 367,943 first three lactation records of 186,064 Holstein cows which calved between 1983 and 2006 in 11,806 herd-year-season groups. The model included herd-year-season of calving and age at calving as fixed effects and animal and permanent environment as random effects. Mean breeding values of cows for each year were regressed on birth year to estimate genetic trends. Genetic trends in milk and fat yields were greater for cows born after 1997 (59.38 kg/yr and 1.11 kg/yr for milk yield and fat yield, respectively). Animal evaluations were partitioned into contribution from parent average, yield deviation (YD) and progeny. DYD of bulls was calculated as described by VanRaden and Wiggans (1991). DYD provides an indication of the performance of the daughters of a bull without consideration of his parents or sons. Variance of bull DYD was greater than variance of their predicted transmitting ability (PTA). Correlation of bull DYD and PTA was dependent on the number of daughters and when this increased, the correlation of DYD and PTA was increased. Also as lactation number of daughters increased, the correlation of bull DYD and PTA was increased.