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Physiological Factors Depressing Feed Intake and Saliva Secretion in Goats Fed on Dry Forage
Sunagawa, K.,Ooshiro, T.,Nakamura, N.,Ishii, Y.,Nagamine, I.,Shinjo, A Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.1
Ruminants eating dry forage secrete large volumes of saliva which results in decreased plasma volume (hypovolemia) and the loss of $NaHCO_3$ from the blood. The present research investigated whether or not hypovolemia and the loss of $NaHCO_3$ from the blood in goats brought about by dry forage feeding actually depresses feed intake and saliva secretion, respectively. The present experiment consisted of three treatments (NI, ASI, MI). In the control treatment (NI), a solution was not infused. In the ASI treatment, i.v. infusion of artificial parotid saliva was initiated 1 h before feeding and continued for the entire 2 h feeding period. In the MI treatment, iso-osmotic mannitol solution was infused. The NI treatment showed that hematocrit and plasma total protein concentration were increased due to decreased circulating plasma volume brought about by feeding. In the ASI treatment, the fluid and $NaHCO_3$ that were lost from the blood because of a feeding-induced acceleration of saliva secretion was replenished with an intravenous infusion of artificial parotid saliva. This replenishment lessened the levels of suppression on both feeding and parotid saliva secretion. When only the lost fluid was replenished with an intravenous infusion of iso-osmotic mannitol solution in the MI treatment, the degree of feeding suppression was lessened but the level of saliva secretion suppression was not affected. These results indicate that the marked suppression of feed intake during the initial stages of dry forage feeding was caused by a feeding-induced hypovolemia while the suppression of saliva secretion was brought about by the loss of $NaHCO_3$ from the blood due to increased saliva secretion during the initial stages of feeding.
High-Power ECRH Experiments in the GAMMA 10 Tandem Mirror
yoshinori Tatematsu,A. Itakura,D. Nagai,H. Higaki,H. Hojo,I. Katanuma,J. Kohagura,K. Nozaki,K. Sakamotoa,K. Ishii,M. Ichimura,M. Yoshikawa,M. Hirata,M. K. Islam,N. Machida,O. Watanabe,T. Imai,T. Numak 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
Power-up of gyrotrons was carried out and corresponding launcher systems were designed for plug and central-cell ECRH systems in the GAMMA 10 tandem mirror. Then, a high-power ECRH experiment was started. For the plug ECRH, new 500-kW gyrotrons produced a new record value of the confining potential. For the central-cell ECRH, development of a new antenna system has increased the transmission rate of incident microwave power and focused it onto the machine axis in the resonance surface. As a result, a clear increase of the diamagnetism was observed during the pulse of ECRH.
SUGIYAMA, KOICHIRO,YONEKURA, YOSHINORI,MOTOGI, KAZUHITO,SAITO, YU,FUJISAWA, KENTA,ISHII, SHOTA,MOMOSE, MUNETAKE,HONMA, MAREKI,TAZAKI, FUMIE,TANAKA, KEI E.I.,HOSOKAWA, TAKASHI,UCHIYAMA, MIZUHO,INAYOSHI The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
We have initiated single-dish monitoring observations of ~400 methanol maser sources at 6.7 GHz using the Hitachi 32-m radio telescope from December 2012 to systematically research periodic flux variations, which are observed in some methanol maser sources associated with high-mass (proto-)stars. In our monitoring, we have made daily monitoring, so that each source has been observed every nine days with an integration time of 5 min (typical $3{\sigma}$ detection sensitivities of 0.9 Jy). The monitoring observations help us statistically understand periodic flux variations with a period longer than 50 days. As an initial result, we present a new detection of periodic flux variations in the 6.7 GHz methanol maser source G 036.70+00.09. The period of the flux variations is ~53 days (~0.019 cycles $day^{-1}$), and seems to be stable over 9 cycles, at least until the middle of August 2014.