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Volume 48, Issue 11
Displaying 1-12 of 12 articles from this issue
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Tatsuo NAKAHARA1977 Volume 48 Issue 11 Pages 591-609
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
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Hiroshi SATO1977 Volume 48 Issue 11 Pages 610-616
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSNorepinephrine (NE) was injected intravenously (4mg/head) over 3 minutes on the stages of prepartum, 2, 6 and 10 weeks after parturition in 6 dairy cows to study the lipid and carbohydrate metabolism accompanied with lactation. Blood samples were taken before and at 5, 10, 20, 30, 40, 50, and 60 minutes after NE injection, and plasma free fatty acid (FFA), free glycerol (FG), triglyceride (TG), glucose, lactate and inorganic phosphorus (i-P) levels were estimated. NE injection brought about increases in plasma FFA, FG, TG, glucose and lactate levels and a decrease in i-P level. On the stage of 2 weeks after parturition, the change in plasma FFA level by NE injection was greatest among the 4 experimental stages. During the lactation period, increases in plasma glucose and lactate levels were larger than dry period, but the increase and recovery in plasma lactate level caused by NE were delayed compared with those in dry period. In dairy cows, it is confirmed that NE stimulate the fat mobilization and glycogenolysis in the liver and muscle as in monogastric animals. And those responses seemed to be accentuated by lactation.View full abstractDownload PDF (433K) -
Yoshizane MAEDA, Tsutomu HASHIGUCHI, Manjiro TAKETOMI1977 Volume 48 Issue 11 Pages 617-622
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSThe authors (1976) detected three phenotypes (AA, AB and BB) of acid phosphatase in the liver of Japanese quail and found that these phenotypes were controlled by a pair of autosomal codominant alleles. In this study, experiments were conducted to find associations of acid phosphatase phenotype with some economical traits in Japanese quail. The results were summarized as follows. 1. In the progeny group segregated from AB×AB matings, the observed number of AB type at 8 weeks of age was lower than the expected number. 2. Body weight of AB type was lighter than those of AA and BB types in both sexes. 3. Concerning performance of egg production traits. (age at first laying, egg weight, egg production ratio and percent of eggs-set), there were no significantly difference. 4. From the comparisons among four mating types AA×AA, AA×BB, BB×AA and BB×BB, it was indicated that the fertility of female of AA type is 10% higher than that of female of BB type. 5. Hatchabilities per fertilized egg and viabilities at 8 weeks of age of three phenotypes (AA, AB and BB) were 72.3% 72.8% and 78.5% in the former, and 80.3%, 76.5% and 81.6% in the latter, respectively. Viability and fitness index of heterozygote (AB) were estimated to be lower than those of homozygotes (AA and BB).View full abstractDownload PDF (469K) -
Yoshizane MAEDA, Tsutomu HASHIGUCHI, Manjiro TAKETOMI1977 Volume 48 Issue 11 Pages 623-628
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSIn this study, experiments were conducted to find associations of hemoglobin phenotype with some economical traits (body weight, egg production traits, fertility, hatchability and fitness) in Japanese quail. Results were summarized as follows, 1. Body weights of the three phenotypes AA, AB and BB segregated from AB×AB mating were measured at 2th, 4th 6th 8th and 10th week of age. The result showed that AB types of female was significantly heavier than other types at 6th week of age, whereas, in the male, there was no difference among phenotypes. 2. Although no differences were found amoung phenotypes, regarding age at first laying and egg weight, there were differences among phenotypes in egg production from 201 to 250 days of age and percentage of eggs-set, the BB type being significantly lower than AA and AB types. 3. Fertilities of the three mating types, AA×AA, AA×BB and BB×BB, were 83.3%, 72.9% and 62.9%, respectively. 4. The viabilities to 8 weeks of age and fitness indexes of AA, AB and BB phenotypes were 65.0%, 66.4% and 60.0% in the former, and 29.3%, 30.9% and 18.7% in the latter, respectively.View full abstractDownload PDF (416K) -
Tsuneo ABE, Takao OISH, Masanori KOMATSU, Shigeru TSUMAGARI, Masatoshi ...1977 Volume 48 Issue 11 Pages 629-633
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSPig α-fetoprotein (AFP) in the sera of pig fetuses and neonates were assayed by the single radial immunodiffusion method using rabbit anti-bovine AFP, which has a strong crossreactivity to pig AFP. The changes of AFP levels in the pig sera during the gestational and postnatal period were compared with those of cattle reported previously. The level of AFP in the pig fetal serum was low in the 4-week fetuses, then increased rapidly and reached the maximum level (4.071mg/ml) in the 7-week fetuses, and thereafter decreased gradually with increasing gestational age. The mean level for neonatal piglets at birth were approximately five times lower than the maximum level for the pig fetuses, but significantly higher as compared that of the calves at birth. The postnatal changes of AFP levels in pigs were differed from those of cattle; that is, while in cattle the AFP decreased rapidly and in most cases disappeared from the circulation within 1 week after birth, in pigs the level increased slightly during the 3-4th days after birth, and then decreased gradually and disappeared after the the 20th day. Assuming that the level of AFP at birth and its persistence after birth in the circulation is dependent on the degree of maturity of the new-born animals, it would he considered that piglets are born in relatively immature state compared with the new-born calves.View full abstractDownload PDF (309K) -
Hajime MIYAMOTO, Goro KATSUURA, Takehiko ISHIBASHI1977 Volume 48 Issue 11 Pages 634-640
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSThe survival of frozen-thawed embryos from five strains of mice was examined. Eight-cell embryos were suspended in a modified Dulbecco's phosphate buffered saline (PBS) or in a modified Tissue Culture Medium 199 (TCM 199), frozen to -79°C and cultured to develop into expanded blastocysts for the assessment of survival. Significantly fewer ddN than embryos of the other strains survived freezing after suspension for 0.5 to 1 hour in PBS at room temperature. Significantly fewer ddN than ddY, ICR and C57BL/6 embryos in TCM 199 survived freezing, and fewer C3H than ddY and ICR embryos in TCM 199 survived freezing. Suspension medium had no significant effect on survival of frozen embryos from each strain except C3H embryos. To the contrary in regard to total embryos from five strains, more frozen-thawed embryos survived after suspension in PBS than in TCM 199 for 0.5 to 1 hour at room temperature. The suspension of ICR embryos for 4.5 to 5 hours at room temperature decreased the survival of subsequent frozen-thawed embryos although the differences were not significant. Mouse embryos can withstand a pH change in the suspension medium from 7.0 to 7.6 at room temperature without adverse effects on embryo survival after freezing and thawing. The results of the present study show that there are strain differences in survival of frozenthawed eight-cell mouse embryos and that a modified TCM 199 is a relatively satisfactory medium for freezing mouse embryos.View full abstractDownload PDF (429K) -
Teru ISHIBASHI, Masao KAMETAKA, Akira OZAKI, Tetsuzo YAMAMOTO, Tomotar ...1977 Volume 48 Issue 11 Pages 641-648
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSTo compare the lysine requirement of the growing germfree and conventionnal chicks, 7-day-old chicks were fed a diet with a graded levels of lysine for 7 days. Daily gains of body weight of the germfree chicks were greater than those of the conventional chicks when the dietary lysine level was higher than the requirement level. Lysine requirement for maximum growth, however, was estimated to be 0.7% of the diet for both groups. After the feeding test, chicks were injected with L-lysine-U-14C and expired carbon dioxide was collected for 2 hours. From the recovery percentage of 14C in the expired carbon dioxide, the lysine requirement was found to be 0.4% of the diet for both groups.View full abstractDownload PDF (350K) -
Mineo HASHIGUCHI, Osamu KOGA, Hisayoshi NISHIYAMA1977 Volume 48 Issue 11 Pages 649-653
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSUsing a bioassay based on 32P-uptake by chick testes, the gonadotropic activity of anterior lobes of pituitary at various times during a 24-hr period was determined for intact male quail which were kept under 8L:16D (8 hours light and 16 hours darkness) for 5 weeks from 29 days of age and for intact and castrated quail which were kept under 8L:16D for 3 weeks from 29 days of age and thereafter under 14L:10D for 2 weeks. In intact birds kept under 8L:16D, no appreciable diurnal rhythm in the pituitary gonadotropic activity was observed. In intact birds kept under 14L:10D, the activity showed two peaks at 8:00 (3 hr after the onset of light) and 19:00 (the end of light period). However, only one peak was found at 19:00 in castrated birds kept under 14L:10D. The results indicate that the diurnal rhythm in the pituitary gonadotropic activity of male quail during the abrupt testicular growth may appear in relation to photoperiod and testicular function.View full abstractDownload PDF (268K) -
Hyung Kee PARK, Tatsumi ITO, Toshiyuki FUKAZAWA1977 Volume 48 Issue 11 Pages 654-660
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSCalcium sensitivity of myosin B prepared from normal and PSE porcine muscles was studied. Studies were also made on the regulatory function of troponin and tropomyosin. The calcium sensitivity of PSE myosin B was partially lost. The desensitization of PSE myosin B is brought about by the inactivation of troponin.View full abstractDownload PDF (350K) -
Iwao TASAKI, Yasushi ISSIKI, Yoshio NAKAHIRO1977 Volume 48 Issue 11 Pages 661-663
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
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Toru SAWASAKI, Yasuhiko KANO1977 Volume 48 Issue 11 Pages 664-666
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
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Reiko YANAI, Junichi MORI, Hiroshi NAGASAWA1977 Volume 48 Issue 11 Pages 667-670
Published: November 25, 1977
Released on J-STAGE: March 10, 2008
JOURNAL FREE ACCESSDownload PDF (603K)
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