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排序方式: 共有198条查询结果,搜索用时 15 毫秒
71.
Kaori Sonobe Taiichiro Hattori Ping An Wataru Tsuji Egrinya Eneji Kiyoshi Tanaka 《Journal of plant nutrition》2013,36(3):433-442
Sorghum [Sorghum bicolor (L.) Moench] was grown hydroponically with or without 50 ppm silicon (Si), and exposed to water stress from 10 days after sowing (DAS). At 15 and 23 DAS, we measured dry weight and diurnal variations in photosynthetic rate (P N), stomatal conductance (g s), transpiration rate (T), leaf water potential (ψ L), and water uptake rate (23 DAS only). The reduction in dry weight at 23 DAS caused by water stress was ameliorated by silicon. Under water stress, silicon-treated seedlings showed higher g s, P N, and T than untreated ones. ψ L remained almost constant within treatments throughout the daytime. Water uptake rate was reduced by water stress, but the reduction was ameliorated by silicon. We conclude that silicon enhanced water uptake and g s, improving water supply to the leaves. These effects of silicon occurred soon after exposure to water stress. 相似文献
72.
Masaru Takeya Fukuhiro Yamasaki Sachiko Hattori Akito Kaga Norihiko Tomooka 《Genetic Resources and Crop Evolution》2013,60(7):1945-1951
The National Institute of Agrobiological Sciences (NIAS) Genebank coordinates the conservation of plant, microorganism, and animal genetic resources related to food and agriculture in Japan. It also coordinates the distribution of genetic resources in the public domain for research, breeding, and educational purposes. To operate the NIAS Genebank efficiently, we have developed a genetic resources database, data management software, and web-based data retrieval systems to make the data available worldwide. This article describes the NIAS Genebank’s Core Collections of global and Japanese soybean (Glycine max (L.) Merr.), Japanese azuki bean (Vigna angularis (Willd.) Ohwi et Ohashi), and Japanese wheat (Triticum aestivum L. s. l.), all of which are available through the Genebank website. This article also describes new features of the NIAS Genebank database, such as the ability to select single-seed-derived germplasm of soybean in the plant search system and to download photographic data on accessions. By using the downloaded plant image PDF files, users can obtain detailed passport and agronomic information by clicking on the image of an accession of interest. 相似文献
73.
In soil microbiology, it is a very important problem to elucidate the interactions between bacterial cells and soil particles. Several workers have studied on the problem from the standpoint of adsorption. 相似文献
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76.
Hisaaki Hiraoka Sakie Morita Yunosuke Gotou Satoshi Hattori Testuo Ishikawa Keiichi Okano 《Fisheries Science》2014,80(3):635-642
In aquatic ecosystems, the stable nitrogen isotope ratio (δ15N) of wakame is affected by the δ15N of its nitrogen source. Thus, the δ15N of wakame is thought to differ between those grown in different aquatic ecosystems. To confirm the authenticity of the geographic origin of Naruto dried wakame (DW), we conducted δ15N analysis. The δ15N (mean ± σ) of Naruto DW model samples (n = 72) was 11.1 ± 1.9 ‰. The δ15N confidence range of Naruto DW from the model was 5.3–16.9 ‰ (mean ± 3σ). The δ15N values of the DW model of Chinese (n = 23) and South Korean origin (n = 22) were 4.2 ± 1.4 and 1.6 ± 2.3 ‰, respectively. Within the δ15N confidence range of Naruto DW, two model samples of Chinese DW and one model sample of South Korean DW were found. From those results, DW of Naruto origin was able to be distinguished from DWs of the Chinese and the South Korean. 相似文献
77.
M. Nazrul Islam Keisuke Ando Hidefumi Yamauchi Yoshinori Kobayashi Nobuaki Hattori 《Wood Science and Technology》2008,42(4):343-350
In this study, the ability of passive impregnation of Douglas fir (Pseudotsuga menziesii Franco) lumber was compared with a conventional full cell method. With an incising density of 10,000 holes/m2 carried out by CO2 laser, square Douglas fir lumber was treated by both passive impregnation and full cell method for 6 h and 50 min. Different
incising densities were also used in passive impregnation to examine the optimum incising density. It was observed that there
was no significant difference between these two methods regarding absorption of liquid, moisture content after dipping and
penetrated area both at cross and longitudinal sections. However, the value was higher in case of full cell method. Regarding
different incising densities, absorption and penetration of liquid was similar for 10,000 and 7,500 holes/m2 but it was low for 5,000 holes/m2. Therefore, it can be concluded that an incising density of 7,500 holes/m2 is the optimum for passive impregnation. The absorption of liquid and its distribution in wood indicates that this non-pressure
passive impregnation method can be a good preservation method for impermeable lumber and can be an alternative to full cell
method. 相似文献
78.
Tanaka Kenzo Tomoaki Ichie Daisuke Hattori Joseph Jawa Kendawang Katsutoshi Sakurai Ikuo Ninomiya 《Forest Ecology and Management》2010
Uncertainties in the rate of biomass variation with forest ageing in tropical secondary forests, particularly in belowground components, limit the accuracy of carbon pool estimates in tropical regions. We monitored changes in above- and belowground biomass, leaf area index (LAI), and biomass allocation to the leaf component to determine the variation in carbon accumulation rate with forest age after shifting cultivation in Sarawak, Malaysia. Nine plots in a 4-year-old forest and fourteen plots in a 10-year-old forest were monitored for 5 and 7 years, respectively. Forest and plant part biomass were calculated from an allometric equation obtained from the same forest stands. Both above- and belowground biomass increased rapidly during the initial decade after abandonment. In contrast, a much slower rate of biomass accumulation was observed after the initial decade. LAI also increased by approximately double from the 4-year-old to 10-year-old forest, and then gently increased to the 17-year-old forest. We also found that allocation variation in leaf biomass and nitrogen was closely related to the rate of biomass accumulation as a forest aged. During the first decade after abandonment, a high biomass and nitrogen allocation to the leaf component may have allowed for a high rate of biomass accumulation. However, reduction in those allocations to leaf component after the initial decade may have helped to suppress the biomass accumulation rate in older secondary forests. Roots accounted for 14.0–16.1% of total biomass in the 4–17-year-old abandoned secondary forests. We also verified the model predicted values for belowground biomass by Cairns et al. (1997) and Mokany et al. (2006), although both models overestimated the values throughout our data sets by 45–50% in the 10-year-old forest. The low root:shoot ratio in the secondary forests may have caused this overestimation. Therefore, our results suggest that we should modify the models to estimate belowground biomass considering the low root:shoot ratio in tropical secondary forests. 相似文献
79.
Kazuyuki Hattori Sota Shikata Ryo Maekawa Masakazu Aoyama 《Journal of Wood Science》2010,56(2):169-171
We examined the dissolution of polystyrene into p-cymene and related substances to develop an alternative method for the recycling of expanded polystyrene. The dissolving
power of p-cymene [212.0 g (100 g solvent)−1] to polystyrene at 50°C compared favorably with those of 2-p-cymenol [156.7 g (100 g solvent)−1], (R)-limonene and its structural isomers [181.7–197.1 g (100 g solvent)−1], and Abies leaf oil [84.7 g (100 g solvent)−1]. The favorable solubility of polystyrene into p-cymene can be explained by the solubility parameter. p-Cymene and polystyrene can be recovered almost quantitatively from the polystyrene solution by simple steam distillation. 相似文献
80.