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排序方式: 共有215条查询结果,搜索用时 15 毫秒
131.
In vitro propagation technique ofGmelina arborea multipurpose and a fast growing tree species was studied. Nodal segment including axillary bud was used as a explant. They
were cultured on MS media containing various concentrations (0–10 mg/l) of BAP alone or in combination with 0.002 mg/l of IBA. Nodal segments showed axillary bud proliferation in almost all media tested. MS media containing 0.22 mg/l of BAP alone and 2 mg/l of BAP in combination with 0.002 mg/l of IBA were effective for inducing multiple shoots and shoot elongation. MS medium supplemented with 0.02 mg/l of NAA and 1 mg/l of IBA gave the best result for rooting. The regenerated plantlets were potted and acclimatized successfully in a growth
chamber and then moved to the green house. Adventitious shoots production from stem explants that were taken from regenerated
plantletin vitro was also discussed. Stem segments were tested for their morphogenetic potential on MS media with various combinations and
concentrations of BAP, zeatin and TDZ. Successfull result was obtained on MS media supplemented with 2 mg/l of BAP and 1 mg/l of zeatin or supplemented with 0.5 mg/l of BAP and 0.5 mg/l of TDZ. The shoots obtained on MS media containing 2 mg/l of BAP and 1 mg/l of zeatin rooted on MS media containing 0.02 mg/l of NAA and 1 mg/l of IBA, and plantlets were successfully obtained.
A part of this paper was presented at the 109th Annual Meeting of the Japanese Forest Society (1998). 相似文献
132.
The insecticidal activities of imidacloprid derivatives with a wide range of substituents at the 5-position on the pyridine ring against American cockroaches, Periplaneta americana (L.), were measured by injection with and without synergists propyl 2-propynyl phenylphosphonate and piperonyl butoxide. The log(1/MLD) value (MLD = minimal lethal dose in mol) without synergists was 7.96 for the methyl derivative, and the values were lower for other derivatives. Synergists enhanced the potencies of all the compounds tested. Considering these compounds and those with other substituents at this position, the region for maximum activity was predicted to be in the conjunction of the pyridyl 6-chlorine atom with a lipophilic small group in the 5-position. 相似文献
133.
Odbayar TO Badamhand D Kimura T Takashi Y Tsushida T Ide T 《Journal of agricultural and food chemistry》2006,54(21):8261-8265
The physiological activities of some phenolic compounds affecting hepatic fatty acid synthesis in mice were compared. Male ICR mice were fed an experimental diet containing 1% quercetin dihydrate, rutin, or ferulic acid or a control diet free of phenolic compounds for 15 days. Quercetin significantly lowered serum cholesterol and phospholipid levels in mice. Also, the serum triacylglycerol level was considerably lower in mice fed the quercetin-containing diet than in those fed a diet free of phenolic compounds, although the difference was not significant. Rutin and ferulic acid did not affect these parameters. Quercetin significantly reduced the activity and mRNA levels of various enzymes involved in hepatic fatty acid synthesis. Rutin reduced a few of the parameters for lipogenesis, but ferulic acid did not affect any of the parameters. It was suggested that a reduction in hepatic lipogenesis is the mechanism underlying the hypolipidemic effect of quercetin. 相似文献
134.
From July to October 1999, two Japanese pear varieties, Housui and Niitaka, were unexpectedly infected with Colletotrichum gloeosporioides causing anthracnose in Saga Prefecture of Japan. More than 90?% of the anthracnose fungus strains collected in 1999 were highly benzimidazole-resistant and distributed at high frequencies across pear-producing areas. The control of anthracnose by benzimidazole fungicides could not be confirmed in orchards where the isolation frequency of resistant strains was high. The frequency of resistant strains did not significantly decline, even 2?C5?years after the last use of benzimidazole fungicides. 相似文献
135.
Ichikawa M Mizuno I Yoshida J Ide N Ushijima M Kodera Y Hayama M Ono K 《Journal of agricultural and food chemistry》2006,54(26):9811-9819
Cycloalliin, an organosulfur compound found in garlic and onion, has been reported to exert several biological activities and also to remain stable during storage and processing. In this study, we investigated the pharmacokinetics of cycloalliin in rats after intravenous or oral administration. Cycloalliin and its metabolite, (3R,5S)-5-methyl-1,4-thiazane-3-carboxylic acid, in plasma, urine, feces, and organs was determined by a validated liquid chromatography-mass spectrometry method. When administered intravenously at 50 mg/kg, cycloalliin was rapidly eliminated from blood and excreted into urine, and its total recovery in urine was 97.8% +/- 1.3% in 48 h. After oral administration, cycloalliin appeared rapidly in plasma, with a tmax of 0.47 +/- 0.03 h at 25 mg/kg and 0.67 +/- 0.14 h at 50 mg/kg. Orally administered cycloalliin was distributed in heart, lung, liver, spleen, and especially kidney. The Cmax and AUC0-inf values of cycloalliin at 50 mg/kg were approximately 5 times those at 25 mg/kg. When administered orally at 50 mg/kg, cycloalliin was excreted into urine (17.6% +/- 4.2%) but not feces. However, the total fecal excretion of (3R,5S)-5-methyl-1,4-thiazane-3-carboxylic acid was 67.3% +/- 5.9% (value corrected for cycloalliin equivalents). In addition, no (3R,5S)-5-methyl-1,4-thiazane-3-carboxylic acid was detected in plasma (<0.1 microg/mL), and negligible amounts (1.0% +/- 0.3%) were excreted into urine. In in vitro experiments, cycloalliin was reduced to (3R,5S)-5-methyl-1,4-thiazane-3-carboxylic acid during anaerobic incubation with cecal contents of rats. These data indicated that the low bioavailability (3.73% and 9.65% at 25 and 50 mg/kg, respectively) of cycloalliin was due mainly to reduction to (3R,5S)-5-methyl-1,4-thiazane-3-carboxylic acid by the intestinal flora and also poor absorption in the upper gastrointestinal tract. These findings are helpful for understanding the biological effects of cycloalliin. 相似文献
136.
137.
I M Nakanish J Yamate M Ide O Sawamoto M Kuwamur T Kotani S Nakatsuji 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(10):1135-1138
A transplantable rat pulmonary carcinoma line (IP) in F344 rats is a useful animal model for humoral hypercalcemia of malignancy (HHM). The present study analyzed the degree of HHM by implanting IP into F344 female rats aged 6, 20 or 45 weeks. IP-bearing females developed elevated plasma parathyroid hormone-related protein levels, hypercalcemia and increased osteoclastic activity as well as calcification in various organs. The severity of such HHM differed depending on age; particularly, calcification showed age-dependent reduction. HHM development in IP-bearing females may be influenced by age-related factors. 相似文献
138.
Jun'ichiro Ide Osamu Nagafuchi Masaaki Chiwa Atsushi Kume Kyoichi Otsuki Shigeru Ogawa 《Journal of Forest Research》2007,12(1):45-56
The behavior of dissolved and particulate components of stream nitrogen (N) and phosphorus (P) were measured for 2 years in
a small mountainous watershed covered primarily with a plantation forest of Japanese cypress (Chamaecyparis obtusa). The load of dissolved N and P bore a consistent relationship to discharge while the load of particulate N and P varied
by up to two orders of magnitude at a given discharge level. Most N was exported in a dissolved form (DN) while most P was
exported in a particulate form (PP), which bears similarity to loads from agricultural watersheds. Owing to the different
behaviors of DN and PP, changes in the total nitrogen (TN) load were primarily attributed to variations in discharge unlike
changes in the total phosphorus (TP) load. High flow conditions, resulting from heavy rainfall, displayed PP release significantly
larger than expected. The TP load in high flow conditions was severely underestimated using a regression equation expressed
as a function of discharge, which was based on the weekly sampling data biased toward low flow conditions. In addition, the
TN load during peak discharges in heavy rain events was underestimated by the regression equation because of unpredictable
increases in the particulate component. Our study shows that the particulate component ratio determines whether discharge
can explain changes in load regardless of chemical species. The results suggest that plantation forests in rainy regions can
be a diffuse source of particulate nutrients depending on soil surface conditions. 相似文献
139.
The time trend of genetic parameters related to diameter growth was investigated using data at ages from 1 to 6 years to determine
the optimum age for selection in four seedling seed orchards of Eucalyptus pellita in South Kalimantan and Riau (Sumatra), Indonesia. The seed orchards at each location were from three geographically distinct
provenances from Papua New Guinea. The pooled sum of squares and sum of cross products derived from an analysis of variance
of growth of the three provenance populations were used to estimate genetic parameters at each location. Because the genetic
parameters at rotation age, 8 years in this study, were not available, they were estimated using functions derived from their
time trends. Phenotypic variances and genetic variances calculated at each age were converted to the corresponding square
roots, and then analyzed by the linear regression using means as independent variables. The trend of juvenile–mature correlation
was fitted by a modified Richards function with the ratio of the older diameter mean to the juvenile diameter as an independent
variable. Early selection always resulted in more genetic gain per year than selection at rotation age, and the optimum age
for selection, where genetic gain per year was maximized, was found to be 4 and 5 years in the two locations. 相似文献
140.
M Hiruma S Ide T Hohdatsu H Yamagishi Y Tanaka Y Fujisaki 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1990,52(4):767-772
Mice inoculated intracerebrally with parent, large-plaque (LP) and small-plaque (SP) strains of Kanagawa strain of Getah virus showed clinically recumbency and paralysis. The LP strain caused recumbency more rapidly and killed mice more early after inoculation than the parent and SP strains. Microscopically, skeletal muscles of the whole body were involved showing degenerative or inflammatory changes. In mice inoculated with the parent or SP strains, there were degeneration and necrosis of the muscle fibers with inflammatory cell infiltration and regenerative reaction. The lesions were particularly conspicuous in muscles of the hind legs. In mice inoculated with the LP strain, most of the muscle fibers revealed degeneration and necrosis, but reactive changes were poor. In addition, the periosteum and muscular connective tissue were thickened with karyorrhexis. Electron microscopically, virus particles were recognized mainly in cisternae of sarcoplasmic reticulum in skeletal muscle fibers of mice inoculated with the LP strain, while they were rare in those of animals injected with the parent and SP strains. From these finding, it was suggested that Kanagawa strain of Getah virus has the virulence to skeletal muscles of mice. 相似文献