Invasion and colonization of mature apple fruit by Erwinia amylovora tagged with bioluminescence genes     

Koji Azegami  Takanori Tsukamoto  Takayuki Matsuura  Tatsuji Ohara  Yasuhiro Inoue  Akifumi Mizuno  Kouji Yoshida  Hideo Bessho  Shigeru Kimura  Masao Goto 《Journal of General Plant Pathology》2005,71(1):98-98

  相似文献   

Physicochemical properties of akabane virus: A member of the simbu arbovirus group of the family bunyaviridae     

E. Takahashi  Y. Inaba  H. Kurogi  K. Sato  Y. Goto  Y. Ito  T. Omori  M. Matumoto 《Veterinary microbiology》1978,3(1):45-54

The multiplication of Akabane virus was not inhibited in the presence of 5-iodo-2′-deoxyuridine, indicating the presence of RNA. The virus was considered to have an envelope, as it was sensitive to ether and chloroform. It was readily inactivated by deoxycholate and trypsin, but was not precipitated by protamine sulphate. The virus was very labile at pH 3 and also rather heat-labile. Akabane virus was readily filtered through membrane filters of 200 or 100-nm pore size, but not through 50-nm filters. Equilibrium centrifugation in a CsCl density gradient gave a peak of infectivity and hemagglutinin at a density of 1.22 g/ml. The peak fractions thus obtained contained numerous virus particles, roughly spherical, variable in size, 70 to 130 nm in diameter, and mostly having a ragged, closely adherent envelope with projections, when examined, following phosphotungstic acid negative staining, in an electron microscope.  相似文献   

Biological studies of pantethine. 7. Influence on the reproductive efficiency of mice     

H Morita  Y Omori  Y Oshima 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1968,30(6):317-322

  相似文献   

Evaluating environmental impacts of the Japanese beef cow–calf system by the life cycle assessment method     

Akifumi OGINO  Hideki ORITO  Kazuhiro SHIMADA  Hiroyuki HIROOKA 《Animal Science Journal》2007,78(4):424-432

The objectives of this study were to evaluate the environmental impacts of a beef cow–calf system using a life cycle assessment (LCA) method and to investigate the effects of scenarios to reduce environmental impacts on the LCA results. The functional unit was defined as one marketed beef calf, and the processes associated with the cow–calf life cycle, such as feed production, feed transport, animal management, the biological activity of the animal and the treatment of cattle waste were included in the system boundary. The present results showed that the total contributions of one beef calf throughout its life cycle to global warming, acidification, eutrophication and energy consumption were 4550 kg of CO₂ equivalents, 40.1 kg of SO₂ equivalents, 7.0 kg of phosphate (PO₄) equivalents and 16.1 GJ, respectively. The contribution of each process to the total environmental impact in each environmental impact category showed a similar tendency to the contribution of each process in each environmental category reported in the case of the beef fattening system as a whole. The results from this analysis showed that shortening calving intervals by 1 month reduced environmental impacts by 5.7–5.8% in all the environmental impact categories examined in the current study, and increasing the number of calves per cow also reduced environmental impacts in all the categories, although the effects were smaller.  相似文献   

Feeding Solanum glaucophyllum to preparturient multiparous cows prevents postparturient hypocalcemia          下载免费PDF全文

Junichiro Ishii  Akifumi Uramoto  Yoshikazu Nagao  Hisaya Goto 《Animal Science Journal》2015,86(10):869-877

Solanum glaucophyllum (SG) contains 1,25‐dihydroxyvitamin D₃ (1,25‐(OH)₂D₃) glycosides. We investigated the effect of SG on hypocalcemia in cows. Serum levels of 1,25‐(OH)₂D₃, total calcium and phosphorus dose‐relatedly increased after feeding with SG, while serum magnesium and chloride levels fell (P < 0.05). We also performed an ethylenediaminetetraacetic acid (EDTA) infusion to induce artificial hypocalcemia. Cows that had been fed 4.0 mg/kg body weight of SG daily for 2 weeks had a higher serum concentration of total calcium at the end of EDTA infusion than those not fed SG (P < 0.05). In a field trial, multiparous cows were assigned to one of four groups: (1) no SG, (2) 1.3 g or (3) 2.6 g of SG daily from 14 days before the estimated calving day until 3 days after calving, or (4) a single feed of 35.75 g SG at 3 days before the estimated calving day. The concentrations of serum total calcium after the calving in each treatment group were (1) 7.4, (2) 7.9, (3) 8.0 and (4) 8.9 mg/dL and higher for (4) than for (1) (P < 0.05). The data suggests that feeding a high dose of SG before the calving may maintain higher concentrations of serum calcium after the calving.  相似文献   

Mitigation of nitrous oxide (N2O) emission from swine wastewater treatment in an aerobic bioreactor packed with carbon fibers          下载免费PDF全文

Takahiro Yamashita  Ryoko Yamamoto‐Ikemoto  Hiroshi Yokoyama  Hirofumi Kawahara  Akifumi Ogino  Takashi Osada 《Animal Science Journal》2015,86(3):358-368

Mitigation of nitrous oxide (N₂O) emission from swine wastewater treatment was demonstrated in an aerobic bioreactor packed with carbon fibers (CF reactor). The CF reactor had a demonstrated advantage in mitigating N₂O emission and avoiding NOx (NO₃ + NO₂) accumulation. The N₂O emission factor was 0.0003 g N₂O‐N/gTN‐load in the CF bioreactor compared to 0.03 gN₂O‐N/gTN‐load in an activated sludge reactor (AS reactor). N₂O and CH₄ emissions from the CF reactor were 42 g‐CO₂ eq/m³/day, while those from the AS reactor were 725 g‐CO₂ eq/m³/day. The dissolved inorganic nitrogen (DIN) in the CF reactor removed an average of 156 mg/L of the NH₄‐N, and accumulated an average of 14 mg/L of the NO₃‐N. In contrast, the DIN in the AS reactor removed an average 144 mg/L of the NH₄‐N and accumulated an average 183 mg/L of the NO₃‐N. NO₂‐N was almost undetectable in both reactors.  相似文献   

Life history and ecology of the glowbelly <Emphasis Type="Italic">Acropoma japonicum</Emphasis> in the Uwa Sea,Japan     

Noboru?OkudaEmail author  Hideki?Hamaoka  Koji?Omori 《Fisheries Science》2005,71(5):1042-1048

ABSTRACT:   The life history and ecology of the glowbelly Acropoma japonicum a commercially important fishery resource, were investigated in the Uwa Sea, Japan. Newly settled juveniles (0⁺) appeared at the end of the breeding season and reached maturity in the next season, i.e. when they became yearlings (1⁺). The yearlings made a gametic effort comparable to that of older fish. During the breeding season, the somatic conditions were more deteriorated for males than for females. That the deterioration of male somatic conditions was not attributable to a sexual difference in energy gain from feeding suggests that the males incurred higher energetic costs of reproduction despite their relatively low gonadosomatic indices. Such an energy depletion may increase the mortality risk, resulting in female-biased sex ratios in the older age classes. Most of the 1⁺ fish disappeared in winter following their first breeding. For A. japonicum , the observed precocity and short life span is notable because it is a higher consumer that is generally expected to show later maturation and longer life. As possible explanations for their disappearances, predation and postbreeding emaciation were less likely. While fishing is one of the most influential factors, the possibility of age-specific migration toward deeper waters remains to be examined.  相似文献   

Predation by scavenging amphipods to injured hatchery-raised juvenile Japanese flounder Paralichthys olivaceus under laboratory conditions     

Keiichiro Ide  Kazutaka Takahashi  Koichi Sasaki  Michio Omori 《Fisheries Science》2006,72(6):1209-1214

ABSTRACT:   The attacking potential of the scavenging amphipod Scopelocheirus onagawae on artificially injured hatchery-raised Japanese flounder Paralichthys olivaceus juveniles was investigated in relation to the degree of injury on the fish. All injured flounder juveniles were attacked by amphipods regardless of the degree of injury, while non-injured juveniles were not attacked. The attack by amphipods on the juveniles generally depended on the amount of glycine, a main feeding stimulant for the amphipod, released from the injury opening. The swimming ability of flounder juveniles was important to avoid the attack of amphipods. Furthermore, an area of injury allowing the amphipods to cling to the fish affects to the vulnerability of juveniles against the predation of amphipods. This study suggests that scavenging amphipods are potentially involved in the rapid reduction of the number of hatchery-raised juveniles.  相似文献   

Flooding tolerance in maize (Zea mays subsp. mays) F1 hybrids containing a QTL introgressed from teosinte (Zea nicaraguensis)     

Y. Mano  F. Omori 《Euphytica》2015,205(1):255-267

  相似文献   

Biological studies of pantethine. 8. Effects of pantethine on estrous cycle and pregnancy in mice     

H Morita  Y Omori  Y Oshima 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1970,32(4):201-207

  相似文献