Evaluating the durability performance of wood-based panels by a non-destructive bending test     

Yoichi Kojima  Akira Sakakibara  Hikaru Kobori  Shigehiko Suzuki 《Journal of Wood Science》2016,62(3):263-269

  相似文献   

Quantification of carotenoids in citrus fruit by LC-MS and comparison of patterns of seasonal changes for carotenoids among citrus varieties     

Matsumoto H  Ikoma Y  Kato M  Kuniga T  Nakajima N  Yoshida T 《Journal of agricultural and food chemistry》2007,55(6):2356-2368

To quantify the 18 carotenoids on the basic routes of the carotenoid biosynthesis in plants simultaneously, a method for liquid chromatography-mass spectrometry (LC-MS) using atmospheric pressure chemical ionization was developed. With this method, the seasonal changes of carotenoids in the flavedo and juice sacs of 39 citrus varieties were analyzed. On the basis of the patterns of seasonal changes of carotenoids in both flavedo and juice sacs, 39 citrus varieties were classified. In flavedo, 39 varieties were classified into 5 clusters, in which the carotenoid profiles were carotenoid-poor, phytoene-abundant, violaxanthin-abundant, violaxanthin- and beta-cryptoxanthin-abundant, and phytoene-, violaxanthin-, and beta-cryptoxanthin-abundant, respectively. In juice sacs, they were classified into 4 clusters, in which the carotenoid profiles were carotenoid-poor, violaxanthin-abundant, violaxanthin- and phytoene-abundant, and violaxanthin-, phytoene-, and beta-cryptoxanthin-abundant, respectively. In flavedo, many citrus varieties, except for the carotenoid-poor and phytoene-abundant varieties, massively accumulated beta,epsilon-carotenoids (e.g., lutein), beta,beta-carotenoids (e.g., beta-cryptoxanthin and violaxanthin), and phytoene, in that order. In juice sacs, the accumulation order among beta,beta-carotenoids was observed. Violaxanthin accumulation preceded beta-cryptoxanthin accumulation in violaxanthin-, phytoene-, and beta-cryptoxanthin-abundant varieties. In each variety, the carotenoid profiles of the flavedo and juice sacs on the basis of the concentration in violaxanthin and beta-cryptoxanthin were similar, with the exception of a few varieties.  相似文献   

Modes of inheritance of two apomixis components,diplospory and parthenogenesis,in Chinese chive (Allium ramosum) revealed by analysis of the segregating population generated by back-crossing between amphimictic and apomictic diploids     

Ken-ichiro Yamashita  Yoshiko Nakazawa  Kiyoshi Namai  Masayuki Amagai  Hikaru Tsukazaki  Tadayuki Wako  Akio Kojima 《Breeding Science》2012,62(2):160-169

To investigate the mode of inheritance of apomixis in Chinese chive, the degrees of diplospory and parthenogenesis were evaluated in F₁ and BC₁ progenies derived from crosses between amphimictic and apomictic diploids (2n = 16, 2x). The F₁ population was generated by crossing three amphimictic diploids 94Mo13, 94Mo49 and 94Mo50 with an apomictic diploid KaD2 and comprised 110 diploids and 773 triploids. All the diploid F₁ plants examined were completely or highly eusporous and completely syngamic. All the triploid F₁ plants examined were highly diplosporous and highly parthenogenetic. KaD2 could not transmit its high level of apomixis via monoploid pollen grains. The BC₁ population, generated by crossing 94Mo49 with apomictic triploids found in the F₁ offspring, exhibited heteroploidy; it comprised haploid, diploid, triploid, tetraploid and various aneuploid individuals. In this generation, clear segregation was observed between diplospory and parthenogenesis. Analysis of the BC₁ population suggests that diplospory and parthenogenesis are each controlled by single dominant genes, D and P, respectively. However, all the BC₁ plants characterized as parthenogenetic were diplosporous. The absence of phenotypically eusporous parthenogenetic plants can be explained by assuming that the presence of diplospory gene is a prerequisite for the parthenogenesis gene expression in Chinese chive.  相似文献   

Effect of 2,4-Dichlorophenoxyacetic Acid on Root Development in Bean Cotyledons     

Akamine EK 《Science (New York, N.Y.)》1948,108(2800):209

  相似文献   

Identification and quantification of the conjugated metabolites derived from orally administered hesperidin in rat plasma     

Matsumoto H  Ikoma Y  Sugiura M  Yano M  Hasegawa Y 《Journal of agricultural and food chemistry》2004,52(21):6653-6659

Hesperidin is a biologically effective flavonoid. Several studies have reported that dietary hesperidin was converted to conjugated metabolites, such as hesperetin-glucuronides and sulfoglucuronides, during absorption and metabolism. However, the chemical structures of the conjugated metabolites, especially the sites of glucuronidation and sulfoglucuronidation in plasma, were unconfirmed. Therefore, the concentrations of the metabolites conjugated at various sites in plasma could not be individually quantified. In the present study, we identified the chemical structures and concentrations of the major conjugated metabolites in rat plasma after oral administration of hesperidin. Two hesperetin-glucuronides were prepared and identified as hesperetin-7-O-beta-D-glucuronide and hesperetin-3'-O-beta-D-glucuronide. Using these authentic compounds, the concentrations of hesperetin-7-O-beta-D-glucuronide and hesperetin-3'-O-beta-D-glucuronide in rat plasma were individually determined by liquid chromatography-mass spectrometry. In rat plasma, hesperetin-glucuronides were primarily comprised of hesperetin-7-O-beta-D-glucuronide and hesperetin-3'-O-beta-D-glucuronide. The concentration of hesperetin-7-O-beta-D-glucuronide was slightly higher than that of hesperetin-3'-O-beta-D-glucuronide. Furthermore, not only hesperetin conjugates but also homoeriodictyol conjugates were observed in rat plasma. The present study is the first report elucidating the chemical structures and changes in individual concentrations in rat plasma of glucuronides derived from orally administered hesperidin.  相似文献   

Growth of Myctophum asperum (Pisces: Myctophidae) in the Kuroshio and transitional waters     

Amane Hayashi  Hikaru Watanabe  Minoru Ishida  Kouichi Kawaguchi 《Fisheries Science》2001,67(5):983-984

  相似文献   

Reactivity and prevalence of neutralizing antibodies against Japanese strains of bovine viral diarrhea virus subgenotypes     

Fujiko MinamiMakoto Nagai  Mika ItoTatsuhiko Matsuda  Hikaru TakaiYoshiko Jinkawa  Takeshi ShimanoMichiko Hayashi  Yoshihisa SekiYoshihiro Sakoda  Katsuaki SugiuraHiroomi Akashi 《Comparative immunology, microbiology and infectious diseases》2011,34(1):35-39

Bovine viral diarrhea virus (BVDV) field isolates show genetic and antigenic diversity. At least 14 subgenotypes of BVDV-1 and 4 of BVDV-2 have been identified in Artiodactyla worldwide. Of these, 6 subgenotypes of BVDV-1 and 1 of BVDV-2 have been isolated in Japan. Previously, we reported that each subgenotype virus expresses different antigenic characteristics. Here we investigated the reactivity of neutralizing antibodies against representative strains of Japanese BVDV subgenotypes using sera from 266 beef cattle to estimate the prevalence of this epidemic virus among cattle in Japan. Antibody titers at concentrations at least 4-fold higher than antibodies against other subgenotype viruses were considered subgenotype specific. Subgenotype-specific antibodies were detected from 117 (80.7%) of 145 sera samples (69.7% against BVDV-1a, 1.4% against BVDV-1b, 8.3% against BVDV-1c, and 1.4% against BVDV-2a). The results suggest that neutralization tests are useful in estimating currently epidemic subgenotypes of BVDV in the field.  相似文献   

Development of an acid soil conditioning agent from lignin by ozone treatment III: improvement of ability of lignin to form an aluminum complex and to reduce aluminum toxicity after ozone treatment     

Hikaru Aimi  Yasuji Kurimoto  Shigeru Yamauchi 《Journal of Wood Science》2011,57(4):338-342

Lignin prepared by a modified Klason method (KSL) was modified with ozone followed by alkaline treatments. The original and modified KSLs were subjected to a plant growth test with radish (Raphanus sativus L. var. radicula Pers.) in the presence of AlCl₃ (37.5 μM) to assess their ability to reduce aluminum toxicity. The formation of an aluminum complex with these KSLs was also examined by potentiometry. Neither the original nor alkaline-treated KSLs had an effect on aluminum toxicity or the formation of a complex, except for the alkaline-treated KSL at a maximal dose of 250 mg/l, which reduced aluminum toxicity. However, all the KSLs modified with ozone and alkali were effective at forming a complex and reducing aluminum toxicity. The dose of saponified ozone-treated KSLs required to reduce aluminum toxicity became lower and their water solubility increased as the ozone treatment was prolonged. These findings clearly show that water solubility and the ability to form a complex with and reduce the toxicity of aluminum were improved by ozone treatment of KSL.  相似文献   

长江三峡花岗岩坡面土管空间分布特征   总被引：2，自引：1，他引：2  

程云  张洪江  王玉杰  盛前丽  常丹东  史玉虎  北原曜  王治中 《北京林业大学学报》2001,23(5):19-22

为深入研究土管的空间分布对土壤水分运动的影响 ,该研究在长江三峡花岗岩坡面选择了一受人为活动影响较小的天然次生马尾松林地作为试验场地 ,开挖土壤剖面 ,观测并研究了其土管空间分布特性 .研究结果表明土管主要分布在距地表以下 0 8～ 1 0m范围内 ,经Iδ 指数检验其分布类型为聚集分布型 .据调查并推断其土管成因主要为土壤形成作用和动物活动或植物根系腐烂后形成的根孔所致  相似文献   

Extension of von Bertalanffy growth model incorporating growth patterns of soft and hard tissues in bivalve molluscs     

Shuhei Ohnishi  Tatsuro Akamine 《Fisheries Science》2006,72(4):787-795

ABSTRACT:   A new practical growth model through the partial reconstruction for the von Bertalanffy function (VBF) has been proposed. In numerous studies on various species, VBF has been recognized as an appropriate function to describe growth. Here the difference in growth dynamics between soft and hard tissues is considered using VBF. A differential equation in which the growth rates of these two tissue types are described, gives a four parameter model. This advanced model showed characteristics such as: (i) S-shape curve similar to the Gompertz model; (ii) unfixed point of inflection; and (iii) definition as an implicit function. The characteristic indicated in (iii) makes it impossible to apply the method of least squares to data analysis. Therefore, a solution was introduced combining Lagrange's method of indeterminate coefficients and the Newton method. Data analysis for verifying the performance of the advanced model was conducted on published data on growth of the bivalve Spisula sachalinensis . As a result of the comparison among the existing growth models, the advanced model produced the minimum value of Akaike information criterion (AIC).  相似文献