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291.
Saburo Okamoto 《Soil Science and Plant Nutrition》2013,59(6):274-279
It has been reported that there is a considerable difference in the response of leaves and roots to K-deficiency (1), which may be due to the difference in the severity of the deficiency in the two tissues under the same K-application (2). The previous work (3) suggested that the metabolic disturbance induced by K-deficiency might depress preferentially the metabolism in roots rather than that in leaves. Another work with taro leaves in the later growth stage (4) suggested that any indirect metabolic disturbance caused by an extended K-deficiency might result in a depressed operation of the TCA cycle. The bleeding experiments with taro plants in the earlier growth stage (5) showed that arseniteand DNP-treatment in vivo with the roots, both reduced significantly the release rate of nitrogenous constituents and water with bleeding sap. Based on these informations, the growth and the respiration of leaves under a moderate K-deficiency were re-examined with younger taro plants in an attempt to compare them with those of the roots (4). At the conclusion of a series of studies on the nutritional physiology of taro plants, effects of Kdeficiency on the metabolic activities of the plants are discussed in special relation to the mitochondrial respiration. 相似文献
292.
Atsushi Mori Kazuhisa Tashiro Kyoko Makita Masahiro Takatani Tadashi Okamoto 《Journal of Wood Science》2005,51(1):38-41
In a series of studies, development of a new aqueous emulsion-type adhesive for use with wood or paper, which does not release formaldehyde or volatile organic solvents, was attempted. For the purpose of increasing both initial and final adhesive strengths, we selected a system consisting of acrylic monomers copolymerized with functional monomers such as diacetone acrylamide and some cross-linking agents such as dihydrazide or polymeric methylene diphenyl diisocyanate (pMDI). It was found that dihydrazide cross-linker was effective for both the initial and final adhesive strengths, suggesting contribution of hydrazone bonds to the bonding strengths. Cross-linking with pMDI might be slow and was not important in the initial bonding. However, its cross-linking effect might develop gradually, because the adhesive showed good final strengths using pMDI as a cross-linker. 相似文献
293.
Landraces of daikon, Japanese radish, Raphanus sativus var. hortensis, are grown and used traditionally in Kyushu, Japan.
These landraces are maintained by seeds harvested from selected plants which are transplanted as dormant tap roots or are
retained in a portion of field. Seeds kept in intact siliquas on the stems are harvested and stored until use, by hanging
the dried stems. Although the relatively small number of plants used in a patch for seed production might be expected to result
in a narrow base of genetic diversity of a farmers' lot in a landrace, addition of a few plants with contrasting features,
pollen exchange between household patches, and contamination from other cultivars and feral forms may save the landraces from
the rapid loss of diversity and deterioration caused by inbreeding depression. The seed production by transplanting described
in medieval Japanese literature is relatively similar to the current practice. The factors responsible for maintenance of
the landrace together with the cultural and climatic diversity of Japan may have contributed to a high diversity of landraces
of the daikon.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
294.
Vicente SJ Ishimoto EY Cruz RJ Pereira CD Torres EA 《Journal of agricultural and food chemistry》2011,59(20):10887-10892
This study evaluated the acute effect of the administration of coffee brew in the activity of phase II antioxidant enzymes in the hepatic tissue of rats. A single dose of this beverage increased the activity of the enzymes SOD, CAT, and GPx; the maximum increase occurred 1 h after administration (19.1, 22.1, and 25.1%, respectively). These changes were statistically significant (p < 0.05), the response was shown to be dose-dependent (p < 0.05), and the return to basal levels took >4 h from the intervention, suggesting a long-term effect. The total antioxidant capacity of the hepatic tissue also exhibited a peak 1 h after the intervention (6.5%), but the increase was not statistically significant and the response was not dose-dependent due to the low exposure to coffee. These results indicate that coffee increases the activities of antioxidant enzymes, improving protection against oxidative stress. 相似文献
295.
Neagari Y Nagamine T Nakaya Y Onuma M Murata K Kuwana T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(3):413-417
The Okinawa rail (Gallirallus okinawae) is an endangered species that inhabits the northern part of Okinawa Main Island in southern Japan. A wild Okinawa rail was rescued from a road in Kunigami Village in Okinawa in October 2009. The bird subsequently died and underwent necropsy. Tumors were found in the liver, spleen and part of the small intestine. Microscopically, lymphoid neoplasm was confirmed in these tissues. The tumor cells were mainly positive for CD3 and CD8α by immunohistochemistry. No Marek's disease virus genes were detected by PCR of a liver tumor. This is the first report of T-cell lymphoma in the Okinawa rail. 相似文献
296.
Karasawa K Tanaka A Jung K Matsuda A Okamoto N Oida K Ohmori K Matsuda H 《Veterinary journal (London, England : 1997)》2011,190(2):e72-e77
Aquaporins (AQPs) function as water channels in many types of cells involved in fluid transport. More than 10 isoforms have been identified, and these are differentially expressed in many types of mammalian cells in the body. Six AQPs (AQP0, AQP1, AQP3, AQP4, AQP5, and AQP9) have been identified in the eyes of humans and/or rodents. The unique permeability characteristics and distribution of AQPs indicate their diverse roles in the regulation of water homeostasis in the eye. The aim of this study was to investigate the localisation of AQPs in normal canine eyes, with AQP0 protein expressed in the crystalline lens and retina. Although AQP1 mRNA was detected in various areas of the canine eye, its protein expression was limited to the cornea, iris and ciliary body. AQP4 was identified in the iris, retina and optic nerve. AQP3 and AQP5 were found in the cornea and conjunctiva, and their expression was particularly high in the limbus. AQP3 and AQP5 were present in the nictitating membrane indicating that they play a role in water transport within the membrane. The observations suggested that several subtypes of the AQP family are involved in the regulation of water homeostasis in the canine eye. 相似文献
297.
Hidemi Oyama Kiyoto Imamura Shinichi Sakamoto Kazutaka Nishi Kotaro Kawabe Shin Okamoto Takeshi Honda Kenji Oyama Takeshi Shimogiri 《Animal Science Journal》2020,91(1)
Defective appearances, including white spotting (WS), tongue defect (TD), and nipple defect (ND), in Japanese Black cattle potentially lead to economic losses to farmers in Japan. We estimated genetic parameters of defective appearances using 553,433 records of Japanese Black heifer calves housed in the Kagoshima Prefecture. Variance and covariance were estimated using the Gibbs sampling algorithm. The estimated heritability ranged from 0.29 for TD to 0.76 for WS. Percent breeding value (%BV) estimates indicated high variation in WS and ND among sires, reflecting higher heritability. Furthermore, there was a positive linear relationship between the %BV estimate of a sire and the mean incidence rate of each defect in his female offsprings. TD was positively associated with other defects. Therefore, genetic factors strongly affect the incidence of defective appearances in Japanese Black cattle. 相似文献
298.
Tomoko Sasaki Fumiyo Hayakawa Yasuhiro Suzuki Keitaro Suzuki Kazuyuki Okamoto Kaoru Kohyama 《Cereal Chemistry》2013,90(2):101-106
The textural properties of cooked waxy rice cakes made from four waxy rice varieties including the unique varieties Kantomochi 172 (K172) and BC3 with the property of rapid hardening were analyzed by instrumental and sensory methods. For the instrumental analysis, a compression test, adhesiveness test, and tensile test were conducted. The waxy rice cakes made from K172 and BC3 showed significantly higher compressive force and resistance to break under tensile load. Significant difference in amylopectin chain‐length distribution was observed between each variety, and this difference strongly reflected the hardness of waxy rice cakes. The peak area ratio of amylopectin branch chains with 6–12 degrees of polymerization negatively correlated with the compressive force required for 50 and 80% strain. Sensory evaluation showed that the waxy rice cakes made from these varieties had a significantly harder, less stretchable, less smooth surface, whereas the scores for adhesiveness and ease to cut off (hagire) were preferable to those for other rice varieties. 相似文献
299.
300.