Evapotranspiration from understory vegetation in an eastern Siberian boreal larch forest     

Shin’ichi Iida  Takeshi Ohta  Kazuho Matsumoto  Taro Nakai  Takashi Kuwada  Alexander V. Kononov  Trofim C. Maximov  Michiel K. van der Molen  Han Dolman  Hiroki Tanaka  Hironori Yabuki 《Agricultural and Forest Meteorology》2009,149(6-7):1129-1139

We measured evapotranspiration in an eastern Siberian boreal forest, in which the understory was cowberry and the overstory was larch, during the entire growing seasons of 2005 and 2006. We compared evapotranspiration from the understory vegetation above the forest floor E_U with evapotranspiration from the whole ecosystem above the overstory canopy E_O. The E_U/E_O ratio had a seasonal trend with a flat-bottomed U-shape during the growing season (4 May–30 September). High-E_U/E_O ratios at the beginning and end of the growing season were observed because larch, one of the two sources of E_O, was a deciduous tree, while the understory was the evergreen cowberry. The mean daily E_U values during the foliated period of larch (1 June–31 August) were 0.8 and 0.9 mm day^?1, or 51.4 and 51.8% of E_O in 2005 and 2006, respectively. The understory vegetation was one of the most important components of the hydrologic cycle in this forest. A significant amount of E_U was caused by plant physiological control, due to the aerodynamic conductance, which was much larger than the surface conductance, leading to a smaller decoupling coefficient. We found that 71% of E_U was caused by the vapour pressure deficit above the forest floor.  相似文献   

Studies on pre-treatment by compression for wood impregnation I: effects of compression ratio,compression direction,compression speed and compression-unloading place on the liquid impregnation of wood     

Youke Zhao  Zhihui Wang  Ikuho Iida  Juan Guo 《Journal of Wood Science》2018,64(5):551-556

To improve the impregnation of wood, the pre-treatment by compression was systematically studied in terms of effects of compression ratio, compression direction, compression speed and compression-unloading place on the liquid impregnation in poplar and Chinese fir. The results showed: the impregnation increased 0.0065 or 0.0074 g/cm³ for every 1% increase of compression ratio when the compression ratio was lower or equal to 50 and 40% for poplar and Chinese fir, respectively; it continued to increase afterwards while the variation was quite big. There existed a significant difference of the impregnation of wood compressed at different directions in Chinese fir, but not in poplar. There existed a significant difference of the impregnation of wood compressed at different speed in both species. The impregnation of wood is likely to be in favor of radial compression in terms of the amount of impregnation. 5 and 10 mm/min were recommended as a compromise of impregnation and pre-treatment efficiency. The impregnation of wood that the compression unloaded in water was about 18.2 (poplar) and 9.2% (Chinese fir) higher in amount and was much quicker in speed than that the compression unloaded in air, and the difference between them was significant, suggesting that compression unloaded in water is significant to improve the impregnation.  相似文献   

Prevalence of Listeria monocytogenes in intestinal contents of healthy animals in Japan.   总被引：1，自引：0，他引：1  

T Iida  M Kanzaki  T Maruyama  S Inoue  C Kaneuchi 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(5):873-875

A total of 1,705 fecal specimens or ileo-cecal contents of cattle, pigs, dogs, cats, chicken and rats were submitted for the isolation of Listeria monocytogenes by the use of the combination of Oxford-LPM agar plates after the cold enrichment in PBS at 4 degrees C for 4-6 weeks. Prevalence of L. monocytogenes was found to be 1.9% in cattle, 0.6% in pigs, 0.9% in dogs and 6.5% in rats. However, none of L. monocytogenes was isolated from chicken or cats. Among 26 isolates of L. monocytogenes, 13 strains (50%) were classified into types 1/2a (3 strains), 1/2b (5 strains) and 4b (5 strains) and were often associated with human listeriosis. The majority of the Listeria spp. other than L. monocytogenes isolated from these animals was found to be L. innocua.  相似文献   

Usability of repeated liver biopsies for estimation of drug residue in calf liver     

Y Takahashi  M Iida  K Oda  Y Kido 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1986,48(5):873-878

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Histopathology of spontaneous lesions in beagles used for toxicity studies   总被引：1，自引：0，他引：1  

M Yasuba  K Okimoto  M Iida 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1987,49(1):51-59

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Molecular cloning and identification of bottle-nosed dolphin flavocytochrome b gp91(phox) and p22(phox) subunits     

Inoue Y  Itou T  Jimbo T  Sakai T  Ueda K  Imajoh-Ohmi S  Iida T 《Veterinary immunology and immunopathology》2000,76(1-2):137-150

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Identification of genes with changes in transcription levels caused by mutations in conidiation regulator genes <Emphasis Type="Italic">REN1</Emphasis> and <Emphasis Type="Italic">FoSTUA</Emphasis> in <Emphasis Type="Italic">Fusarium oxysporum</Emphasis>     

Yuichiro Iida  Toshiaki Ohara  Takashi Tsuge 《Journal of General Plant Pathology》2007,73(3):158-167

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Liquid penetration of precompressed wood VII: combined treatment of precompression and extraction in hot water on the liquid penetration of wood   总被引：1，自引：0，他引：1  

Ikuho Iida  Sulaeman Yusuf  Ugai Watanabe  Yuji Imamura 《Journal of Wood Science》2002,48(1):81-85

The object of this study was to determine the cause of differences in the improvement in liquid penetration of precompressed wood species. The maximum amount of water uptake by the capillary rise method and changes in the aspirated pits seen with scanning electron microscopy before and after of preextraction and precompression were investigated using heartwood samples of four softwoods. The height of penetration and the weight by the capillary rise method for preextractive wood powders are discussed. Three wood species andLarix leptolepis showed marked increases in the amount of solution uptake after precompressed treatment only.Larix leptolepis wood required compression after extraction by boiling in water. These differences among wood species were caused by the accumulation of extractive material. It was also recognized that the accumulative material inLarix wood has plasticity and that inPseudotsuga is brittle. Based on these results it was found that it is difficult to destroy aspirated pits in the former and easy in the latter. On the other hand, the difference in penetration of each wood species was caused by the quantity and quality of the extraction material in addition to the extent of the wettability of the surface of the cell cavity as well as aspirated pit.Part of this report was presented at the 46th annual meeting of the Japan Wood Research Society, Kumamoto, April 1996  相似文献   

Effect of electric impulse on sporocarp formation of ectomycorrhizal fungusLaccaria laccata in Japanese red pine plantation     

Shoji Ohga  Shigeru Iida 《Journal of Forest Research》2001,6(1):37-41

We examined the effect of electric impulses on sporocarp formations of ectomycorrhizal fungus in a Japanese red pine (Pinus densiflora) plantation.Laccaria laccata was the dominant species in this study plantation. Spatial distribution concentrated in the electric impulse treatment zone, and recorded a markedly larger number of sporocarps compared with untreated control plots. The effect of electric impulses was also recognized onL. laccata fruiting with a mycorrhizal sapling in a pot. Sporocarp production ofL. laccata was strongly promoted by the electric impulse in experiments bothin vivo natural plantation stands andin vitro pot saplings. Our work indicates the possibility of enhancement of sporocarp production of the mycorrhizal fungi with electric impulses in the nursery and plantation. This work was partly supported by a grant from the Kyushu Electric Power Company.  相似文献   

Adsorptive properties of dyes to cellulosic sheet and discoloration of dye solution by UV-ray irradiation     

Zhou Yu Iida Ikuho Minato Kazuya Kurosu Hiroshi 《中国林学(英文版)》2005,7(2):19-25

The adsorptive properties and selectivity of dyes and water molecules to cellulosic sheet, dependence of adsorptive properties of dyes on the concentration of dye solution, and discoloration of the dye solution due to the UV-ray irradiation were determined for 18 kinds of commercial dyes. The results are as follows： 1） the adsorptive properties of dyes to cellulose sheet differed greatly, but did not depend on the dye types such as acidic, basic and so on; 2） adsorptive properties of dyes to cellulosic sheet de- pended on the concentration of dye solution and were classified into 4 types： concentration-independent, increasing or decreasing with dye concentration, and having a maximum. This classification was irrelevant to the dye types; 3） the irradiation of UV-ray did not cause significant discoloration of dye solution itself, which suggested that wood components as well as dye molecules influence the discoloration of wood.  相似文献