中日实学的交流:新井白石与朱之瑜     

古藤友子 《湖南农业大学学报(自然科学版)》2005,(1)

新井白石曾求学于儒学学者木下顺庵,而木下顺庵与浙江余姚的朱之瑜有交流,新井白石因顺庵举荐,曾出仕德川纲丰的甲府藩,白石一生著述甚丰,其语言学著作有<东雅>、<同文通考>、<东音谱>等书,<东雅>是一部关于古语名词语源的辞典.白石不仅关注一种语言内部的诸种变化,更注意到了多种语言间的相互影响.白石的研究语言的方法,一方面是木下顺庵那种广泛涉猎文献的实证学风的继承,另一方面也是吸收中国明代学术成果的结晶.朱之瑜在日本住了23年,白石著作中多处引用了朱之瑜的话,新  相似文献   

Structural insights into the assembly of the type III secretion needle complex     

Marlovits TC  Kubori T  Sukhan A  Thomas DR  Galán JE  Unger VM 《Science (New York, N.Y.)》2004,306(5698):1040-1042

Type III secretion systems (TTSSs) mediate translocation of virulence factors into host cells. We report the 17-angstrom resolution structures of a central component of Salmonella typhimurium TTSS, the needle complex, and its assembly precursor, the bacterial envelope-anchored base. Both the base and the fully assembled needle complex adopted multiple oligomeric states in vivo, and needle assembly was accompanied by recruitment of the protein PrgJ as a structural component of the base. Moreover, conformational changes during needle assembly created scaffolds for anchoring both PrgJ and the needle substructure and may provide the basis for substrate-specificity switching during type III secretion.  相似文献   

An attempt at estrus detection in cattle by continuous measurements of ventral tail base surface temperature with supervised machine learning     

Shogo HIGAKI  Hongyu DARHAN  Chie SUZUKI  Tomoko SUDA  Reina SAKURAI  Koji YOSHIOKA 《The Journal of reproduction and development》2021,67(1):67

We aimed to determine the effectiveness of estrus detection based on continuous measurements of the ventral tail base surface temperature (ST) with supervised machine learning in cattle. ST data were obtained through 51 estrus cycles on 11 female cattle (six Holsteins and five Japanese Blacks) using the tail-attached sensor. Three estrus detection models were constructed with the training data (n = 17) using machine learning techniques (random forest, artificial neural network, and support vector machine) based on 13 features extracted from sensing data (indicative of estrus-associated ST changes). Estrus detection abilities of the three models on test data (n = 34) were not statistically different among models in terms of sensitivity and precision (range 50.0% to 58.8% and 60.6% to 73.1%, respectively). The relatively poor performance of the models might indicate the difficulty of separating estrus-associated ST changes from estrus-independent fluctuations in ST.  相似文献   

Histopathological changes in the pancreas due to decreased pancreatic blood flow in a canine tachycardia-induced cardiomyopathy model     

Aritada YOSHIMURA  Takahiro OHMORI  Kokoro ITOU  Ryo ISHI  Yuri MATSUMURA  Yuhei WADA  Miori KISHIMOTO  Tomoko IWANAGA  Naoki MIURA  Kazuhiko SUZUKI  Ryuji FUKUSHIMA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(5):780

In dogs, pancreatic acinar cell injury is thought to be caused by decreased pancreatic blood flow due to heart failure. In previous our report, it demonstrated that decreased heart function causes a significant decrease in pancreatic blood flow in heart failure dog model caused by rapid ventricular pacing (RVP). However, the types of histopathological changes remain unclear. We aimed to verify the types of histopathological changes occurring in the pancreatic tissue due to decreased heart function. After RVP for 4 weeks, atrophy of pancreatic acinar cells, characterized by a decrease in zymogen granules, was observed in all areas of the pancreas. In conclusion, the result of this study suggests that attention should be paid to ischemia/hypoperfusion injury in the pancreas.  相似文献   

Rhizosphere pH Profile of Rice Plant Influenced by Al Treatment     

Yoshitake Hayashi  Keitaro Tanoi  Hiroyuki Nishiyama  Tomoko M. Nakanishi 《Soil Science and Plant Nutrition》2005,51(5):729-731

To study the mechanisms of Al tolerance in rice, we focused on the change of rhizosphere pH. The 4-d seedlings were treated with Al solution (0, 10, 50 mM) for 24 h. Then each sample was put on an agarose gel including bromocresol green, so that the color of the gel indicated pH change. During 2-h contact, the pH of rhizosphere was decreased gradually, especially for Al-treated samples, showing the specific pH profiles along the root axis. Pretreatment of sample plants with a decoupling reagent 2,4-dinitrophenol (DNP) or a plasma membrane H⁺-ATPase inhibitor Na₃VO₄ did not decrease rhizosphere pH. Therefore, it was suggested that the H⁺ secretion activity was involved with Al-tolerant mechanisms of rice.  相似文献   

Production of interspecific hybrids between Alstroemeria pelegrina L. var. rosea and A. magenta Bayer by ovule culture     

Takayuki Ishikawa  Tomoko Takayama  Hiroshi Ishizaka  Keiko Ishikawa  Masahiro Mii 《Euphytica》2001,118(1):19-27

Interspecific hybrids were efficiently produced in the cross-incompatible combination between Alstroemeria pelegrina L. var. rosea and A. magenta Bayer by culturing immature ovules with placenta 7–14 days after pollination on 2 g/l Gelrite-solidified MS medium containing 3% (w/v)sucrose. The plants showed intermediate characteristics between the parents and their hybridity was confirmed by karyotype and DNA analyses. The mean number of chromosome association per PMC at metaphase I was 2.60I+6.70II, pollen stainability was20.8%, and they produced viable seeds after self-pollination. Furthermore, mature plants were obtained when the hybrids were backcrossed as male parents with both the parents. The backcross-progeny from A. pelegrina var. rosea × hybrids exhibited 3.8 to 79.7% pollen stainability and that from A. magenta × hybrids 78.8 to 98.3%. Almost all of these plants produced viable seeds after self-pollination, which implies that they can beutilized for breeding of novel cultivars of Alstroemeria. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Effects of ear corn silage supplementation on milk production and milk fatty acid profiles in grazing dairy farms     

Tomohiro Mitani  Sadaki Asakuma  Yuka Shinoda  Yasuko Ueda  Yasuhiro Aoki  Tomoko Oshita 《Animal Science Journal》2020,91(1)

This study investigated the effects of substituting ear corn silage (ECS) for commercial formula feed on milk production and milk fatty acid profiles in grazing dairy farms during the summer season. A field survey was conducted on five grazing dairy farms in every summer month of 2017, 2018, and 2019. Three of the five farms substituted fresh ECS for the commercial formula feed at a ratio of 2:1 from July of each year (ECS farms). Other farms maintained the same feeding management as before (non‐ECS farms). An interview survey was conducted on each farm to calculate feed intake and milk yield per cow. Feed and milk samples were collected in each survey. Milk compositions and milk fatty acid profiles were determined. The substitution of ECS for the commercial formula feed did not affect milk yield or milk composition, but ECS farms maintained low levels of milk urea compared with non‐ECS farms (p < .01). The ECS substitution also influenced some of the milk fatty acid proportions; C16:0 and C16:1 increased, and trans‐11 C18:1, cis‐9,trans‐11 C18:2, and the sum of polyunsaturated fatty acids decreased, while these fatty acid proportions were maintained in non‐ECS farms throughout the summer season (p < .05).  相似文献   

Microbial hydrolytic enzyme activity in the sediments of a net cage aquaculture area     

Tomoko?SakamiEmail author  Hisashi?Yokoyama  Yuka?Ishihi 《Fisheries Science》2005,71(2):271-278

Potential microbial extracellular leucine-aminopeptidase (LAP) and β-glucosidase (βGlc) activity in the sediments of a red sea-bream (Pagrus major) aquaculture area were measured. Temporal variations in these enzymatic activities were low and stable from December 1999 to April 2000. They rose but fluctuated widely from May to November 2000. LAP activity in the sediments ranged from 334 to 4461 nmol/g per h in the 0–1-cm layer and from 106 to 258 nmol/g per h in the 4–5-cm layer. βGlc activity ranged from 221 to 4121 nmol/g per h in the 0–1-cm layer and from 18 to 238 nmol/g per h in the 4–5-cm layer. These values were higher than others reported and the organic matter load from the fish farms appeared to promote these enzymatic activities, although the relationship was not linear. The ratio of LAP to βGlc was smaller than other reported values in marine sediments or in water samples from the same aquaculture area, suggesting that not only quantitatively but qualitatively an aspect of organic matter degradation in the sediment might be changed by the heavy supply of organic materials from fish farms.  相似文献   

Development of genomic and EST-SSR markers in radish (Raphanus sativus L.)     

Ryoichi Nakatsuji  Tomoko Hashida  Naoko Matsumoto  Masato Tsuro  Nakao Kubo  Masashi Hirai 《Breeding Science》2011,61(4):413-419

Radish (Raphanus sativus L.) belongs to Brassicaceae family and is a close relative of Brassica. This species shows a wide morphological diversity, and is an important vegetable especially in Asia. However, molecular research of radish is behind compared to that of Brassica. For example, reports on SSR (simple sequence repeat) markers are limited. Here, we designed 417 radish SSR markers from SSR-enriched genomic libraries and the cDNA data. Of the 256 SSR markers succeeded in PCR, 130 showed clear polymorphisms between two radish lines; a rat-tail radish and a Japanese cultivar, ‘Harufuku’. As a test case for evaluation of the present SSRs, we conducted two studies. First, we selected 16 SSRs to calculate polymorphism information contents (PICs) using 16 radish cultivars and four other Brassicaceae species. These markers detected 3–15 alleles (average = 9.6). PIC values ranged from 0.54 to 0.92 (average = 0.78). Second, part of the present SSRs were tested for mapping using our previously-examined mapping population. The map spanned 672.7 cM with nine linkage groups (LGs). The 21 radish SSR markers were distributed throughout the LGs. The SSR markers developed here would be informative and useful for genetic analysis in radish and its related species.  相似文献   

Prevalence of Dirofilaria immitis infection in living raccoon dogs assessed by hematological examination     

Kido N  Wada Y  Takahashi M  Kamegaya C  Omiya T  Yamamoto Y 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(6):845-847

The prevalence of Dirofilaria immitis in free-ranging raccoon dogs (Nyctereutes procyonoides viverrinus) was examined in the southeast region of Kanagawa Prefecture, Japan, using a rapid immunomigration (RIM) test kit. Between April 2007 and March 2010, we examined 108 raccoon dogs rescued and housed by the Kanazawa Zoological Garden. D. immitis infection was found in 8 (7.4%) raccoon dogs. This is the first report to reveal the prevalence of D. immitis infection in living raccoon dogs. The prevalence of the infection was lower than previously reported values obtained on postmortem examination. One reason might be that the present study included young raccoon dogs infected with immature worms. Significant high-risk areas of D. immitis infection in the raccoon dogs were not observed.  相似文献