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61.
Shingo Kawai Kyousuke Nakata Masako Ohashi Tomoaki Nishida 《Journal of Wood Science》2008,54(3):256-260
After feeding experiments of Myrica rubra young shoots with 4-[8,9-13C2]coumaric acid, mass spectrometric analyses revealed that the cyclic diarylheptanoids, myricanol and myricanone, were derived
from two molecules of 4-coumaric acid. 13C Nuclear magnetic resonance analysis of myricanol isolated after administration of 4-[8,9-13C2]coumaric acid demonstrated that the C-8 and C-9 atoms of 4-coumaric acid are incorporated into C-8, C-9, C-11, and C-12 of
the corresponding myricanol.
Part of this report was presented at the 56th Annual Meeting of the Japan Wood Research Society, Akita, August 2006 相似文献
62.
Soil salinity is an increasing threat to the productivity of glycophytic crops worldwide. The root plays vital roles under various stress conditions, including salinity, as well as has diverse functions in non-stress soil environments. In this review, we focus on the essential functions of roots such as in ion homeostasis mediated by several different membrane transporters and signaling molecules under salinity stress and describe recent advances in the impacts of quantitative trait loci (QTLs) or genetic loci (and their causal genes, if applicable) on salinity tolerance. Furthermore, we introduce important literature for the development of barriers against the apoplastic flow of ions, including Na+, as well as for understanding the functions and components of the barrier structure under salinity stress. 相似文献
63.
Tomoaki Morishita Ryusuke Hatano Roman V. Desyatkin 《Soil Science and Plant Nutrition》2013,59(3):369-377
Abstract Quartz and mica contents were determined as a function of particle size of soils over quartz and mica-free basalts in northwestern Kyushu and San-in. The contents of both minerals were much higher in the surface soil horizons than in the lower horizons. Quartz particle size distribution (predominantly 2 to 53 μm) and surface morphology (chip or shard, not euhedral) which are similar to those in the north central Pacific pelagic sediments and Hawaiian soils, indicated that quartz is added as aerosolic dust and loess carried by the circumpolar Westerly Winds from Asian semi-arid and arid regions. Close proximity to the eolian sources was deduced by somewhat coarser texture of the present soil quartz. Lower surface soil quartz content, relative to that in the Hawaiian soils was interpreted as indicating a younger landscape age caused by intensive denudation. The covariant relation between the quartz and miea eontents of soils may suggest that at least a portion of the micaceous minerals and quartz in Ando soils of Japan also has a tropospheric origin. 相似文献
64.
Estimation of mean tree height using small-footprint airborne LiDAR without a digital terrain model 总被引：1，自引：0，他引：1
Kazukiyo Yamamoto Tomoaki Takahashi Yousuke Miyachi Naoto Kondo Shinichi Morita Motohiko Nakao Takashi Shibayama Yoshiyuki Takaichi Masashi Tsuzuku Naoaki Murate 《Journal of Forest Research》2011,16(6):425-431
In order to estimate mean tree height using small-footprint airborne light detection and ranging (LiDAR) data, a digital terrain
model (DTM), which is a continuous elevation model of the ground surface, is usually required. However, generating accurate
DTMs in mountainous forests using only the LiDAR data is laborious and time consuming, because it requires human-assisted
methods, especially in the forests with poor laser penetration rates. Based on our previous finding that a hypothetical continuous
surface model passing through the predominant tree tops (hereafter, called the “top surface model” or TSM) might be nearly
parallel to a DTM, we assumed that the vertical difference between the TSM and the ground return was the mean tree height.
According to this assumption, we propose a new methodology that does not require a DTM to estimate mean tree height. This
method completely, automatically, and directly estimates mean tree height (MTH
E) from the LiDAR data without requiring a regression analysis using reference data. From the relationships between the MTH
E and the observed mean tree height (MTH
O) in different hinoki cypress forests, we demonstrate that this method effectively estimates the mean tree height with nearly
1-m accuracy. 相似文献
65.
Tochitani T Toyosawa K Matsumoto I Kouchi M Michimae Y Koujitani T Funabashi H Seki T 《Journal of toxicologic pathology》2011,24(4):245-249
In the present study, we investigated the histological, immunohistochemical and ultrastructural characteristics of cytoplasmic blood plasma inclusions that spontaneously occurred in a rat liver. Histologically, a number of cytoplasmic inclusions were observed in the liver of an 8-week-old female SD rat. These inclusions were strongly positive for PAS staining and resistant to diastase digestion. Immunohistochemical analyses revealed that these inclusions were positive for albumin and IgG; however, most of them were negative for LAMP-1 and LAMP-2. Ultrastructurally, the inclusions were surrounded by limiting membranes and composed of moderately electron dense, homogenous materials. These characteristics described here represent valuable information for pathological examination in toxicity studies. 相似文献
66.
Toshifumi Minamoto Mie N. Honjo Hiroki Yamanaka Nobuyuki Tanaka Tomoaki Itayama Zen&#x;ichiro Kawabata 《Research in veterinary science》2011,90(3):530-532
The disease caused by cyprinid herpesvirus-3 (CyHV-3) severely impacts the natural freshwater ecosystem and damages carp and koi farming, however, the pathway of CyHV-3 transmission remains unclear. It is possible that the virus adheres to plankton, which then facilitate viral movement and transmission, and therefore, it is hypothesised that plankton are involved in the disease dynamics. In this study, plankton were collected at eight sites in the Iba-naiko lagoon; we detected and quantified CyHV-3 DNA from plankton samples. The results of the correlation analysis showed a significant positive correlation between CyHV-3 copies and the number of Rotifera, suggesting that CyHV-3 binds to and/or is concentrated by Rotifera. Our results suggest that plankton affect viral ecology in the natural environment. 相似文献
67.
Tomoaki ONODA Ryuta YAMAMOTO Kyohei SAWAMURA Yoshinobu INOUE Akira MATSUI Takeshi MIYAKE Nobuhiro HIRAI 《Journal of Equine Science》2011,22(2):37-42
Thoroughbred horses are seasonal mating animals, raised in northern regions or countries.
Foals born yearly in spring generally show a typical seasonal compensatory growth pattern,
in which their growth rate declines in the first winter and increases in the next spring.
In this study, a new empirical adjustment approach is proposed to adjust for this
compensatory growth when growth curve equations are estimated, by using 1,633 male body
weights of Thoroughbreds as an illustrating example. Based on general Richards growth
curve equation, a new growth curve equation was developed and fit to the weight-age data.
The new growth curve equation had a sigmoid sub-function that can adjust the compensatory
growth, combined with the Richards biological parameter responsible for the maturity of
animals. The unknown parameters included in the equations were estimated by SAS NLMIXED
procedure. The goodness of fit was examined by using Akaike’s Information Criterion (AIC).
The AIC values decreased from 13,053 (general Richards equation) to 12,794 (the newly
developed equation), indicating the better fit of the new equation to the weight-age data.
The shape of the growth curve was improved during the period of compensatory growth. The
proposed method is one of the useful approaches for adjusting seasonal compensatory growth
in growth curve estimations for Thoroughbreds, and for their management during the
compensatory period. Based on this approach, the optimal growth curve equations can be
estimated also for female body weight of Thoroughbreds or other growth traits affected by
seasonal compensatory growth. 相似文献
68.
69.
Michio Yoneda Yutaka Kurita Daiji Kitagawa Masaki Ito Takeshi Tomiyama Tomoaki Goto Kiyotaka Takahashi 《Fisheries Science》2007,73(3):585-592
ABSTRACT: This study examined age and growth of Japanese flounder Paralichthys olivaceus off the Pacific coast of northern Japan, and determined whether the growth patterns of male and female fish in northern (40–41°N) and southern (37–38°15'N) waters differ. In total 8095 specimens were collected between January 1999 and December 2005. Zonation consisting of opaque and translucent bands on the otolith was evident. Within each opaque band a thin and clear check (ring mark) was observed in all specimens examined. Monthly change in the frequency of appearance of a ring mark on the outer margin of the otolith indicates that ring marks form between July and August. The von Bertalanffy growth model showed a sexual dimorphism in growth, as females grew faster and reached a larger size than males. The growth patterns obtained by tracking the observed total length for monthly collections showed a rapid increase in total length between August and October. Spatial variation in the growth pattern of male and female fish between northern and southern waters was evident, as southern fish were significantly larger than northern counterparts during 1.25–3.00 years post hatch. 相似文献
70.