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101.
Masuda T Inaba Y Maekawa T Takeda Y Yamaguchi H Nakamoto K Kuninaga H Nishizato S Nonaka A 《Journal of agricultural and food chemistry》2003,51(7):1831-1838
A simple detection method for a powerful radical scavenging compound in a mixture containing a large variety of compounds, such as the raw extract of edible plants, was developed using 1,1-diphenyl-2-picrylhydrazyl (DPPH) as the radical reagent. The method was established on the basis of the features of the typical chain-breaking antioxidation reaction mechanism, which suggests that the radical scavenging antioxidant should be converted to other stable nonradical compounds during the reaction. This method requires only a simple HPLC instrument, and the disappearance or decrease in the peak intensity, which is induced by the addition of DPPH. This change is monitored by the HPLC to detect the powerful radical scavenger from the complex mixture. The method was applied to the detection and identification of the most powerful antiradical compound in the extracts of three antioxidatively active plant extracts (Psidium guajava, Citrus depressa, and Hypericum chinense). The radical scavenging efficiency of a newly identified compound from H. chinense was also compared with that of Trolox and catechin using the method. 相似文献
102.
Mitochondrial and nuclear genomic diversities of 8 carrot (Daucus carota ssp. sativus) varieties, including 6 pure lines and
2 cytoplasmic male sterile (cms) lines, were taxonomically identified using PCR with 19 RAPD primers. Dendrograms based on
polymorphisms of both mitochondrial and nuclear genomes were constructed. According to the dendrogram of the mitochondrial
genome revealed by RAPD, 4 differentiated clusters formed, in good accordance with the classification based on analyses with
restriction enzyme digestion. Two cms lines were grouped into the same cluster, as genetically separated from the others.
Thus, the cytoplasm donors of these male sterile lines were thought to be wild carrots. Conversely, RAPD analysis of the nuclear
genome for these eight cultivars revealed no evident clusters although some cultivars were of a similar origin or place of
cultivation. A correlation between nuclear and mitochondrial dendrograms was absent. RAPD has proved to be a useful tool for
identifying mitochondrial and nuclear genomes. This technique will greatly aid in promoting efficient improvement of carrots.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
103.
104.
Mekuriaw Shigdaf Tsunekawa Atsushi Ichinohe Toshiyoshi Tegegne Firew Haregeweyn Nigussie Nobuyuki Kobayashi Tassew Asaminew Mekuriaw Yeshambel Walie Misganaw Tsubo Mitsuru Okuro Toshiya 《Tropical animal health and production》2020,52(3):1287-1298
Tropical Animal Health and Production - Browse species are important sources of forage for livestock in Ethiopia, especially during the dry season, when the quality and quantity of green herbage is... 相似文献
105.
106.
Soichi?TanakaEmail author Yuko?Fujiwara Yoshihisa?Fujii Shogo?Okumura Hiroyoshi?Togo Naoya?Kukutsu Tadao?Nagatsuma 《Journal of Wood Science》2011,57(3):189-194
The attenuation coefficients of 100-GHz millimeter waves polarized linearly were measured for cross-cut, quarter-sawn, and
flat-sawn boards of hinoki (Chamaecyparis obtusa) that were 0.2–2.0 cm thick. This was done to examine the applicability of free-wave propagation theory for applying electromagnetic
waves to wood. It was found that the transmittance of a millimeter wave through the specimen boards was lower when the fiber
direction of a board was parallel to the direction of the electric field of the incident wave than when the fiber direction
was perpendicular to the electric field, and there was little difference in the transmittance between the tangential and radial
directions for the former case. These findings can be quantitatively explained by using propagation theory and the dielectric
properties of wood. 相似文献
107.
108.
The aim of this study was to examine the pharmacokinetics of nicorandil, a hybrid of an adenosine triphosphate-sensitive potassium channel opener and a nitrate, and to estimate its clinical doses in dogs with mild mitral valve regurgitation (MR). Nicorandil (0.1, 0.3, and 1.0 mg/kg) was administered orally to normal dogs and those with experimentally-induced MR, and its plasma concentrations were analyzed using high-performance liquid chromatography. Plasma concentrations increased dose-dependently after the administration of nicorandil, and were not different between normal dogs and those with MR. Similar to the effective plasma values obtained in cardiac disease in humans, the findings of this pharmacokinetic study may indicate that a dose of 0.3-1.0 mg/kg has the same effectiveness in dogs with cardiac dysfunction. 相似文献
109.
Takuya Furukawa Kazue Fujiwara Samuel K. Kiboi Patrick B. Chalo Mutiso 《Biological conservation》2011,144(12):3047-3054
Detailed patterns and preferences of informal wood extraction were investigated in an urban forest used by slum inhabitants of Nairobi, Kenya, as such information determines the sustainability of resource use. Instead of asking the people what they had secretly cut, a survey was conducted of the stumps and trees left in the forest to (i) evaluate how accessibility and patrolling affected spatial patterns of resource use, and to (ii) estimate a broad spectrum of species and species-specific size preferences. Both probability and size of cutting increased with better accessibility (represented by distance from the slum), and stump size exceeded that of living stem size around 1.7 km from the slum, which suggested magnified impact of tree cutting near the slum. Patrolling (represented by distance from ranger stations) had little effect in reducing the probability of cutting but was effective in reducing cut size. With the use of random effect models, a broad species preference spectrum (including less abundant and non-preferred species) was estimated, which indicated trends in vegetation change. Smaller stems were preferred for most species presumably used for domestic fuelwood, but major exploitation of large Brachylaena huillensis stems traded in the woodcarving industry was also revealed. Such detailed information on informal wood use can help forest managers to understand threats to the forests as well as the needs of local communities. This is a first step to redefining ‘acceptable’ resource use by the local community for their increased role and responsibility in sustainable forest management, especially when conventional controls of informal activities (i.e. exclusion and penalty) are not functioning well. 相似文献
110.
Takami S Ogawa K Umemura T Hibi D Ishii Y Okamura T Tasaki M Inoue T Suzuki Y Jin M Cho YM Nishikawa A 《Journal of toxicologic pathology》2011,24(1):63-67
Carcinosarcomas are rare tumors in humans as well as rats and most commonly occur in the uterus. Recently, we observed a case of incidental carcinosarcoma of the uterus in a female Wistar Hannover GALAS [BrlHan:WIST@ Jcl (GALAS)] rat at 2 years of age. Histopathologically, the tumor was characterized by an admixture of malignant epithelial and nonepithelial elements. The carcinomatous components represented a type of endometrial carcinoma, consisting of glandular and solid proliferation of large-sized tumor cells. Prominent mitoses and tumor cell invasion were observed. The sarcomatous components were characterized by multifocal proliferation of severe atypical cells with cartilage matrix and were diagnosed as chondrosarcoma. Transitions between carcinomatous and sarcomatous components were observed, and many tumor cells in the solid lesion showed immunohistochemical reactivity with both cytokeratin and vimentin. Based on these findings, this tumor was diagnosed as a uterine carcinosarcoma. This is the first report of uterine carcinosarcoma in Wistar Hannover GALAS [BrlHan:WIST@Jcl (GALAS)] rats. 相似文献