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COMPARISON OF PERFORMANCE OF YOUNG CALVES IN SEVERAL HOUSING SYSTEMS IN THE WINTER OF COLD REGIONS
Okamoto, M.,Sone, A.,Hoshiba, S. Asian Australasian Association of Animal Productio 1993 Animal Bioscience Vol.6 No.2
A total of thirty male Holstein calves were reared outdoors with simple housings or in warmed pens in three experiments conducted in three consecutive midwinters in Hokkaido. Average outdoor air temperatures during the experiments were between -5.3 and $-6.1^{\circ}C$, and average minimum air temperatures were between -9.7 and $-10.6^{\circ}C$. The age of calves at the start of the experiments were $16{\pm}6$ hours. There was no difference in the liquid feed intake, while the solid concentrate (artificial milk) intake by the calves in the simple housing systems (outdoors, calf hutch and open shed) tended to be higher than those in the warmed pen. No significant differences in the daily gain or the monthly development of wither height were observed among housing systems. There were no serious cases of diarrhea. However, coughing was observed in several of the calves reared in the poorly ventilated warmed pens.
RELATIONSHIP BETWEEN PARTICLE POOL SIZE IN THE RETICULO-RUMEN AND CHEWING TIME IN SHEEP
Okamoto, Masahiro,Miyazaki, H.,Oura, R.,Sekine, J. Asian Australasian Association of Animal Productio 1990 Animal Bioscience Vol.3 No.3
Sixteen mature sheep were fed chaffed orchardgrass hay once a day. Jaw movement of the sheep was recorded for 24 hours before slaughter. Four sheep were slaughtered either prior to eating, 2, 8 or 16 hours after the commencement of eating to measure digesta pool size and particle size distribution in the reticulo-rumen. Eating time was restricted to 120 minutes. Rumination time and actual chewing time during rumination increased with time after the meal. Mean dry matter (DM) pool size before and 2 hours after the meal were 1.36 and 2.45 times of DM intake, respectively. The proportion of large particle (>1.18 mm; LP) in the DM ingested during the meal was caculated to be about 70%. The mean DM and LP pool sizes per DM intake and the mean proportion of LP in the DM pool decreased with time after the meal. There were close negative relationships between either DM or LP pool sizes per DM intake and the chewing activities either expressed as time spent rumination, actual chewing time during rumination or total actual chewing time(total of eating time and actual chewing time during rumination). The difference between DM intake and LP pool size were assumed to be LP degradation in the present experiment, and correlated positively with the chewing activities. A large proportion of the digesta load was comprised of small particles, in excess of the daily intake.
Cohort Analysis of Incidence/Mortality of Liver Cancer in Japan through Logistic Curve Fitting
Okamoto, Etsuji Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10
Incidence/mortality of liver cancer follow logistic curves because there is a limit reflecting the prevalence of hepatitis virus carriers in the cohort. The author fitted logistic curves to incidence/mortality data covering the nine five-year cohorts born in 1911-1955 of both sexes. Goodness-of-fit of logistic curves was sufficiently precise to be used for future predictions. Younger cohorts born in 1936 or later were predicted to show constant decline in incidence/mortality in the future. The male cohort born in 1931-35 showed an elevated incidence/mortality of liver cancer early in their lives supporting the previous claim that this particular cohort had suffered massive HCV infection due to nation-wide drug abuse in the 1950s. Declining case-fatality observed in younger cohorts suggested improved treatment of liver cancer. This study demonstrated that incidence/mortality of liver cancer follow logistic curves and fitted logistic formulae can be used for future prediction. Given the predicted decline of incidence/mortality in younger cohorts, liver cancer is likely to be lost to history in the not-so-distant future.
Blood Protein Polymorphisms of Native Fowls in Laos
Okamoto, S.,Tsunekawa, N.,Kawamoto, Y.,Worawut, R.,Kawabe, K.,Maeda, Y.,Nishida, T. Asian Australasian Association of Animal Productio 1999 Animal Bioscience Vol.12 No.7
Blood protein polymorphism of fowls in Laos was analyzed by electrophoresis. Blood samples were collected in the area of Viangchan, Louangphrabang and Pakxe. Out of 17 loci, polymorphism was detected at the following seven loci; ES-1, Amy-1, Akp-akp, Akp-2, Alb, Tf and Pas. The other ten loci; Amy-3, LDH, 6-PGD, PGM, PHI, To, MDH, Es-D, Hb-l, Hb-2 were noted to be monomorphic. The proportion of polymorphic loci $(P_{poly})$, the expected average heterozygosity per individual ($\bar{H}$), and the subdivision index $(G_{ST})$ of the native fowl in Laos was $0.412{\pm}0.123$, 0.106 and 0.026, respectively. Genetic distance between native fowls in Laos, Bangladesh, and Nepal was clustered in one group.
Charge Transfer in Iridate-Manganite Superlattices
Okamoto, Satoshi,Nichols, John,Sohn, Changhee,Kim, So Yeun,Noh, Tae Won,Lee, Ho Nyung American Chemical Society 2017 NANO LETTERS Vol.17 No.4
<P>Charge transfer in superlattices consisting of SrIrO3 and SrMnO3 is investigated using density functional theory. Despite the nearly identical work function and nonpolar interfaces between SrIrO3 and SrMnO3, rather large charge transfer was experimentally reported at the interface between them. Here, we report a microscopic model that captures the mechanism behind this phenomenon, providing a qualitative understanding of the experimental observation. This leads to unique strain dependence of such charge transfer in iridate-manganite superlattices. The predicted behavior is consistently verified by experiment with soft X-ray and optical spectroscopy. Our work thus demonstrates a new route to control electronic states in nonpolar oxide heterostructures.</P>