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Asian-Australasian journal of animal sciences 18건

  1. [국내논문]   POSSIBLE ROLES OF SUBMANDIBULAR SALIVARY GLANDS ON OVARIAN STEROIDS RESPONSIVENESS OF MOUSE MAMMARY GLANDS  

    Yuh, I.S. (Department of Dairy Science, College of Animal Agriculture, Kangwon National University ) , Jang, B.B. (Department of Dairy Science, College of Animal Agriculture, Kangwon National University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 695 - 699 , 1996 , 1011-2367 ,

    초록

    This experiment was to determine the effect of sialoadenectomy on the ability of the mammary gland development to response to ovarian steroids, estrogen and progesterone, stimulus in vivo. Body weights did not differ between sham-operated and sialoadenectomized mice within 0 to 18 day estradiol + progesterone (E + P) injection (p > 0.05). Sialoadenectomy reduced mammary development scores from 4.6 to 3.9 or from 4.4 to 3.8 in comparison with those of sham-operated mice for the 12 or 18 day E + P injection ( $P{\leq}0.05$ ), however, sialoadenectomized mice with 0, 1, 3 or 6 day of E + P injection slightly decreased mammary development scores relative to those of sham-operated mice. These results indicate that the endocrine factor secreted from submandibular salivary gland appears to be required for the mammary development to respond fully to estradiol and progesterone. Similar results were obtained in the measurement of mammary DNA contents. Mammary DNA contents of sialoadenectomized mice were significantly decreased relative to those of sham-operated mice for the 6, 12 or 18 day E + P injections. Overall results suggest that salivary gland-secreted endocrine factor, presumably epidermal growth factor (EGF), was mammogenic and should interact with ovarian steroids in mammary development.

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  2. [국내논문]   INFLUENCE OF PHENYLALANINE IN THE MEDIUM ON PROTEIN SYNTHESIS OF CHICKEN EMBRYO FIBROBLASTS  

    Kita, K. (Laboratory of Animal Nutrition, School of Agricultural Sciences, Nagoya University ) , Miyazaki, M. (Laboratory of Animal Nutrition, School of Agricultural Sciences, Nagoya University ) , Okumura, J. (Laboratory of Animal Nutrition, School of Agricultural Sciences, Nagoya University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 701 - 703 , 1996 , 1011-2367 ,

    초록

    The influence of phenylalanine (Phe) in the medium on protein synthesis of chicken embryo fibroblasts (CEF) was examined. CEF was derived from 9-d-old embryos by trypsin-EDTA digestion. To examine the deficiency of Phe in the medium, CEF was cultured in Dulbecco's modified Eagle's medium (DMEM) with or without Phe. CEF was also cultured in Dulbecco's phosphate buffered saline (PBS ( $Ca^{2+}$ , $Mg^{2+}$ )) with or without $400{\mu}m$ Phe in order to examine the effect of Phe supplementation. All media were supplemented with 10% (v/v) fetal calf serum. After incubation for 6, 30 and 54 h, protein synthesis was measured by the incorporation of L-[2, $6-^{3}H$ ] Phe into CEF for further 18 h. Protein synthesis of CEF cultured in DMEM was higher than that in PBS ( $Ca^{2+}$ , $Mg^{2+}$ ). High specific radioactivity of Phe due to the low concentration of Phe in the medium resulted in the apparent increase in protein synthesis of CEF. Protein synthesis cultured in PBS ( $Ca^{2+}$ , $Mg^{2+}$ ) with Phe did not increase during 72 h of cell culture.

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  3. [국내논문]   DILUTION AND SHORT-TERM STORAGE OF COCK SPERMATOZOA BY INHIBITION OF MOTILITY WITH FRUCTOSE AT AMBIENT TEMPERATURE  

    Mohan, J. (Central Avian Research Institute ) , Moudgal, R.P. (Division of Physiology and Reproduction, Central Avian Research Institute)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 705 - 709 , 1996 , 1011-2367 ,

    초록

    A simplified dilutor for cock spermatozoa at ambient temperature was achieved by adjusting the 5% concentration of fructose in isotonic saline. Motility of cock spermatozoa was arrested completely for maximum 6 hrs without affection the survivability of spermatozoa by employing this sugar. To study the effect of high concentration of fructose on fertility, sperm were inseminated with or without fructose at different hrs. Fructose from semen samples was removed by centrifugation. High fertility obtained in the hens inseminated with fructose free sperm (washed). In addition, washed sperm maintained the 85.00% fertility for 6 hrs in winter season ( $17-21^{\circ}C$ ) and 82.67% fertility for 3 hrs in summer season ( $31-35^{\circ}C$ ). Whereas control groups showed 47.33 and 25.33% fertility in winter and summer season respectively. No significant difference was found in percent motility and live counts between the control and washed experimental groups during winter season. However, these measures differed significantly in summer. Washing of cock spermatozoa more than once, high speed centrifugation and more duration for centrifugation proved harmful to fertility. It may be concluded that fructose (5%) can be used as a motility or metabolic inhibitor of spermatozoa for short-term storage of cock semen at ambient temperatures.

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  4. [국내논문]   SEASONAL VARIATIONS IN THE HYPOPHYSIAL RESPONSIVENESS TO GnRH IN CYCLING BUFFALO (Bubalus bubalis)  

    Palta, P. (Embryo Biotechnology Centre, National Dairy Research Institute ) , Madan, M.L. (D. D. G. (A. S.), Indian Council of Agricultural Research)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 711 - 714 , 1996 , 1011-2367 ,

    초록

    The present study investigated the hypophysial responsiveness in terms of GnRH induced LH and FSH release in cycling buffalo during the tropical summer and winter climatic conditions (seasons). Peripheral plasma LH and FSH levels were measured at 1 hour before and 6 hours subsequent to the administration of GnRH (1 ug/kg body weight) or saline on Day 14 of oestrous cycle in 2 groups of buffalo (n = 6 each) during summer and winter seasons. Although GnRH induced LH peak concentrations did not differ during the two seasons, time to attain LH peak concentration was shorter (p

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  5. [국내논문]   RELATIONSHIPS BETWEEN EGGSHELL QUALITY AND BIOCHEMICAL PARAMETERS OF CALCIUM METABOLISM  

    Kang, C.W. (Animal Resources Research Center, Kon-Kuk University ) , Nam, K.T. (Animal Resources Research Center, Kon-Kuk University ) , Olson, O.E. (Department of Animal and Range Sciences, South Dakata State University ) , Carlson, C.W. (Department of Animal and Range Sciences, South Dakata State University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 715 - 722 , 1996 , 1011-2367 ,

    초록

    To determine relationships of biochemical parameters involved in Ca metabolism with eggshell quality, serum Ca level, duodenal and uterine calcium binding protein (CaBP) and uterine carbonic anhydrase (CA) activities were measured using 102-week old hens. Three groups of chickens were selected, those showing high quality (HQ) and low quality (LQ) eggshells and non-laying activity (NE). NE hens exhibited significantly (p

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  6. [국내논문]   THE DEVELOPMENT OF THE WATER LOADED PRESSURE METHOD FOR MEASURING EGGSHELL QUALITY  

    Kang, C.W. (Animal Resources Research Center, Kon-Kuk University ) , Nam, K.T. (Animal Resources Research Center, Kon-Kuk University ) , Olson, O.E. (Department of Animal and Range Sciences, South Dakota State University ) , Carlson, C.W. (Department of Animal and Range Sciences, South Dakota State University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 723 - 726 , 1996 , 1011-2367 ,

    초록

    A water loaded pressure device using water as the breaking force was developed to evaluate eggshell strength and compared with a dropping ball techniques. Further, relationships of shell thickness and weight of eggs to shell strength were also studied. Values for both of the shell strength measuring methods showed a highly significant correlation (p

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  7. [국내논문]   EFFECTS OF DIETARY PROTEIN LEVEL, RESTRICTED FEEDING, STRAIN AND AGE ON EGGSHELL QUALITY IN LAYING HENS  

    Kang, C.W. (Animal Resources Research Center, Kon-Kuk University ) , Nam, K.T. (Animal Resources Research Center, Kon-Kuk University ) , Olson, O.E. (Department of Animal and Range Sciences, South Dakota State University ) , Carlson, C.W. (Department of Animal and Range Sciences, South Dakota State University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 727 - 735 , 1996 , 1011-2367 ,

    초록

    The effects of four factors-two dietary protein levels (12 and 16%), feeding methods(ad libitum and restricted), strains (A and B), and age of hens-on egg quality and laying performance were examined. Use of the 12% dietary protein level resulted in significantly lower (p $F{\times}A$ ) were obtained for all parameters. Restricted feeding had favorable effects on shell strength and Haugh unit values after 28 and 16 weeks of egg production, respectively. There was significant difference in shell strength between the two strain. Examination of the three-factor interaction among protein levels, feeding method and strain ( $P{\times}F{\times}S$ ) disclosed that the favorable effect of the A strain on shell strength was significant only with the 16% protein-restricted fed group. The other treatment group did show a trend for greater shell strength of the A strain. Mean values for all the parameters examined changed significantly (p

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  8. [국내논문]   EFFECTS OF CUTTING FREQUENCY AND NITROGEN FERTILIZATION ON DRY MATTER YIELD OF REED CANARYGRASS (Phalaris arundinacea L.) IN UNCULTIVATED RICE PADDY  

    Lee, J.S. (Department of Biological Resources & Technology, College of Liberal Arts & Sciences, Yonsei University ) , Ahn, J.H. (Department of Dairy Science, Faculty of Agriculture, Anseong National University ) , Jo, I.H. (Department of Animal Science, College of Natural Resources, Taegu University ) , Kim, D.A. (Department of Animal Science & Technology, College of Agriculture and Life Sciences, Seoul National University)
    Asian-Australasian journal of animal sciences v.9 no.6 ,pp. 737 - 741 , 1996 , 1011-2367 ,

    초록

    Dry matter yield of reed canarygrass was investigated in uncultivated rice paddy in Korea, and an attempt was made to estimate the most economic and efficient cutting frequency and rates of nitrogen (N) fertilization, for increased production of reed canarygrass. Total dry matter yields of reed canarygrass per year were 7.4-15.7, 8.5-16.1, and 7.5-13.4 tons/ha in 3, 4, and 5 cutting frequencies, respectively, and over the N treatments of 0-120 kg N/ha/cut. When cut 3 or 5 times annually, the 2nd cut produced the highest proportion of total yield at 38.4 and 33.0%, respectively, when cut 4 times the 3rd cut was highest (38.3%). The ranges of economic N level, limiting N level and efficiency of dry matter production were 243.3-293.0, 387.2, and 14.6 kg DM/kg N, respectively. These indicators were particularly low for the 5 cutting frequency possibly because of the unusually high temperature in the summer season. The best cutting frequency for the dry matter production of reed canarygrass in 1994 was 3 per year because of the higher efficiency of dry matter production.

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