检索结果-南通市图书馆

Narrow portion of the terminal choledochus is a cause of upstream biliary dilatation in patients with anomalous union of the pancreatic and biliary ducts

引用

World Journal of Gastroenterology 2005年第41期11卷 6503-6507页

作者： tatsuya Nomura Yoshio Shirai Toshifumi Wakai Naoyuki yokoyama Jun Sakata Katsuyoshi Hatakeyama Division of Digestive and General Surgery Niigata University Graduate School of Medical and Dental Sciences 1 Asahimachi-doriNiigata951-8510Japan

AIM: To clarify the pathogenesis of biliary dilatation associated with anomalous union of the pancreatic and biliary ducts (AUPBD).METHODS: Direct cholangiopancreatograms of 350 adult patients with or with suspicion of hepatobiliary or pancreatic disorders were reviewed. AUPBD was diagnosed cholangiopancreatographically, when the pancreaticobiliary ductal union was located above the narrow distal segment of the bile duct, which represents the action of the sphincter of Oddi. The narrow portion of the terminal choledochus was defined as symmetrical stricture of the common bile duct just above the pancreaticobiliary ductal ***: AUPBD was found in 36 patients. Among cholangiopancreatographic features, the narrow portion of the terminal choledochus was the most pathognomonic for AUPBD (accuracy, 98%); it was present in 29 (81%)patients with AUPBD, but was not found in any patients without AUPBD. Among patients with AUPBD, biliary dilatation (＞10 mm) was more frequent in those with the narrow portion of the terminal choledochus (23/29)than in those without (2/7; P = 0.018) AUPBD. Among the patients with both AUPBD and the narrow portion of the terminal choledochus, there was a strong negative correlation between the minimum diameter of the narrow portion and the maximum diameter of the choledochus (r = -0.78, P＜0.001), suggesting that the degree of biliary narrowing at the narrow portion correlates with that of upstream biliary ***: The narrow portion of the terminal choledochus, a pathognomonic radiologic feature of AUPBD, may be a cause of biliary dilatation in patients with AUPBD.

关键词： Anomalous Biliary dilatation Congenital biliary dilatation Congenital choledochal cyst Terminal choledochus Cholangiopancreatography

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

使用3分量伺服加速度计监测海底稳定性

引用

海洋地质 2009年第1期25卷 46-46页

作者： tatsuya yokoyama Hideki Saito Hiroshi Kameya 杨丽娟（译）闫章存（校对）应用地质株式会社岩土研究所日本不详

为了检测甲烷释放期间海底的稳定性，我们需要不断测量海底的位移。在陆地上的滑坡点，滑坡移动的地表位移监测通常是使用滑觉传感器来进行的。这些仪器测量一个固定点与滑体测量点之间的相对位移。不过，这种方法不适用于海底的位移测... 详细信息

为了检测甲烷释放期间海底的稳定性，我们需要不断测量海底的位移。在陆地上的滑坡点，滑坡移动的地表位移监测通常是使用滑觉传感器来进行的。这些仪器测量一个固定点与滑体测量点之间的相对位移。不过，这种方法不适用于海底的位移测量，因为在海底很难确定一个固定的参考点。

关键词：海底稳定性位移监测伺服加速度计滑觉传感器甲烷释放相对位移仪器测量

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Endophytic Fungi Associated with a Holoparasitic Plant, Balanophora japonica (Balanophoraceae)

引用

American Journal of Plant Sciences 2016年第1期7卷 152-158页

作者： Hideko Ikeda tatsuya Fukuda Jun yokoyama Graduate School of Science and Technology Yamagata University Yamagata Japan Department of Forestry Faculty of Agriculture Kochi University Nankoku Japan Department of Biology Faculty of Science Yamagata University Yamagata Japan Institute for Regional Innovation Yamagata University Yamagata Japan

Holoparasitism is a special life cycle of flowering plants. All carbon resources are provided by photosynthetic host plants. A recent study revealed the presence of endophytic fungi in holoparasitic plants, but their ecological and evolutionary roles are still unknown. In this study, we examined endophytic fungi isolated from the holoparasitic plant Balanophora japonica (Balanophoraceae), collected from Kochi, Shikoku in western Japan. We isolated 23 fungal strains on inflorescences and tubers from three B. japonica plants at two locations and on one sample of the host plant (Symplocos lancifolia, Symplocaceae). Predominant isolates were Trichoderma-Hypocrea, Penicillium and Phialemonium. The first group was also predominant in the host plant. Fungal composition revealed in this study differed from the composition on B. harlandii or other root holoparasites with endophytic fungal (Rafflesia cantleyi) data. Those differences might be caused by various factors, including growth habits, location, phylogenetic position or host-parasite relationship.

关键词： Balanophoraceae Balanophora japonica Endophytic Fungi Holoparasitic Plant Symplocos lancifolia Western Japan

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Breakdown of Obligate Mutualism on a Small Island: An Interspecific Hybridization between Closely Related Fig Species (Ficus pumila and Ficus thunbergii) in Western Japan

引用

American Journal of Plant Sciences 2015年第1期6卷 126-131页

作者： Lum Tsai Hiroshi Hayakawa tatsuya Fukuda Jun yokoyama Graduate Schools of Science and Engineering Yamagata University Yamagata Japan National Institute for Agro-Environmental Sciences Tsukuba Ibaraki Japan Faculty of Agriculture Kochi University Nankoku Kochi Japan Faculty of Science Yamagata University Yamagata Japan

Ficus (Moraceae) is a well-known group with specific pollination mutualisms, and hybridization is considered to be rare. Here, we report the presence of interspecific hybrids between Ficus pumila L. and F. thunbergii Maxim. on Okinoshima, a small island offshore of Shikoku, western Japan. AFLP (amplified fragment length polymorphism of genomic DNA) data suggested that more than one-fourth of individuals of morphological F. pumila were assigned as intermediate genotypes, suggesting hybrids. The hybridization between the two species was introgressive and unidirectional from F. thunbergii to F. pumila. The findings of this study, combined with other previous reports, suggest that the breakdown of mutualistic systems can occur in isolated populations such as those on islands.

关键词： AFLP Island Hybridization Ficus pumila Ficus thunbergii Western Japan

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Phylogeny Determined Using Chloroplast DNA Inferred a New Phylogenetic Relationship of Rorippa aquatica(Eaton) EJ Palmer &Steyermark (Brassicaceae)—Lake Cress

引用

American Journal of Plant Sciences 2014年第1期5卷 48-54页

作者： Hokuto Nakayama Kenji Fukushima tatsuya Fukuda Jun yokoyama Seisuke Kimura Faculty of Agriculture Kochi University Nankoku Japan Faculty of Life Sciences Kyoto Sangyo University Kamigamo Motoyama Kyoto Japan Faculty of Science Yamagata University Yamagata Japan National Institute for Basic Biology Okazaki Japan School of Life Science The Graduate University for Advanced Studies Okazaki Japan

North American lake cress, Rorippa aquatica (Eaton) EJ Palmer & Steyermark (Brassicaceae), is listed as an endangered or threatened species. Lake cress shows heterophyllic changes in leaf form in response to the surrounding environment. Therefore, this species has received considerable attention from ecological and morphological perspectives. However, its phylogenetic position and taxonomic status have long been a subject of debate. To analyze the phylogenetic relationship of lake cress, we investigated chloroplast DNA sequences from 17 plant species. The results of phylogenetic reconstruction performed using trnL intron, trnG (GCC)-trnM (CAU), and psbC-trnS (UGA) indicated that lake cress is a member of Rorippa. Moreover, we found that the chromosome number of lake cress is 2n = 30. This result indicated that lake cress might have originated from aneuploidy of triploid species or via intergeneric crossing. Taken together, our results suggest an affinity between lake cress and Rorippa at the molecular level, indicating that lake cress should be treated as Rorippa aquatica (Eaton) EJ Palmer & Steyermark.

关键词： Lake Cress Neobeckia Phylogeny psbC-trnS Rorippa trnL Intron trnG-trnM

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nucleotide Sequence Variations in a Medicinal Relative of Asparagus, Asparagus cochinchinensis(Lour.) Merrill (Asparagaceae)

引用

American Journal of Plant Sciences 2011年第6期2卷 765-775页

作者： tatsuya Fukuda In-Ja Song Takuro Ito Hiroshi Hayakawa Yukio Minamiya Akira Kanno Hokuto Nakayama Jun yokoyama 不详

To determine the eVolutionary history of Asparagus cochinchinensis (Asparagaceae), we investigated the geographic pattern of its nucleotide sequence variations in Japan, Taiwan, South Korea and China. We found 21 polymorphic nucleotide sites by sequencing the internal transcribed spacer (ITS) region, which gave rise to a total of 15 haplotypes, labeled A to O. The A-type was found only in inland China (Guizhou and Sichuan), and the other haplotypes in China extended to several lineages;therefore, A. cochinchinensis may have its origin in the interior of China. The I-type has large distribution area and it also experienced a quick expansion in relative recent years. Haplotype differentiation was observed between the eastern and western side of the Central Mountain Ridge in Taiwan. Two lineages were found in Japan, one in the Yaeyama Islands and the other in remaining areas of Japan, implying that A. cochinchinensis independently colonized in Japan at least twice.

关键词： Asparagus cochinchinensis Internal Transcribed Spacer (ITS) Phylogeny Phylogeography

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interspecific Hybridization between Arisaema sikokianumand A. serratum(Araceae) Confirmed through Nuclear and Chloroplast DNA Comparisons

引用

American Journal of Plant Sciences 2011年第4期2卷 521-526页

作者： Hiroshi Hayakawa Hidenori Hamachi Kanako Matsuyama Yuko Muramatsu Yukio Minamiya Katsura Ito Jun yokoyama tatsuya Fukuda Faculty of Agriculture Kochi University Nankoku Japan

A morphologically intermediate plant between Arisaema sikokianum Franch. et Sav. and A. serratum (Thunb.) Schott has been newly found in Kochi Prefecture, Shikoku, Japan. The putative hybrid has the intermediate morphological characteristics of the parental species. Molecular analysis using PCR-RFLP of internal transcribed spacer (ITS) in nuclear DNA (nrDNA) indicates that the putative hybrid has a combined pattern of the two putative parent species. Moreover, the sequence result of chloroplast DNA (cpDNA) of the putative hybrid was identical to that of A. sikokianum. These results suggest that the putative hybrid is a hybrid between A. sikokianum and A. serratum and that it was formed by interactive gene exchanging via pollens from A. serratum to A. sikokianum. It is the first record of a hybrid between A. sikokianum and A. serratum.

关键词： Araceae Arisaema A. serratum A. sikokianum Chloroplast DNA Interspecific Hybrid Molecular Analysis Nuclear DNA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparative Study of Leaf Morphology in Aster hispidusThunb. var. leptocladus(Makino) Okuyama (Asteraceae)

引用

American Journal of Plant Sciences 2012年第1期3卷 110-113页

作者： Hiroshi Hayakawa Tunala Yukio Minamiya Katsura Ito Stephan Gale Jun yokoyama Ryo Arakawa tatsuya Fukuda 不详

The comparative morphology and anatomy of leaves in the serpentine endemic Aster hispidus Thunb. var. leptocladus (Makino) Okuyama and its close relative A. hispidus var. hispidus were examined. Our morphological analysis revealed that the leaves of A. hispidus var. leptocladus were significantly smaller and narrower than those of A. hispidus var. hispidus. In particular, our anatomical analysis indicated that a decreased cell number of the horizontal axis of a leaf was involved in A. hispidus var. leptocladus. This was the same process as the changing pattern of the leaves of rheophytic species, and so, similar morphological leaf modifications occurred under different selection pressures of the serpentine soil and flooding frequency of river-stream.

关键词： Anatomical Analysis Aster hispidus var. leptocladus Cell Number Minitualization Serpentine Stenophyllization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Coastal Adaptation of Adenophora triphylla var. japonica(Campanulaceae)

引用

American Journal of Plant Sciences 2013年第3期4卷 596-601页

作者： Kyohei Ohga Miwako Muroi Hiroshi Hayakawa Jun yokoyama Katsura Ito Shin-Ichi Tebayashi Ryo Arakawa tatsuya Fukuda Faculty of Agriculture Kochi University Kochi Japan Faculty of Agriculture Kochi University Kochi Japan. Faculty of Science Yamagata University Yamagata Japan. Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan.

The comparative morphology and anatomy of leaves between the coastal ecotype and the normal type of Adenophora triphylla (Thunb.) ***. var. japonica (Regel) *** (Campanulaceae) were examined to clarify the differences in morphological characters between the 2 groups. Morphological and anatomical analyses revealed that the coastal ecotype had a thicker leaf than the normal type, because of the increased size of epidermal and spongy cells. Thus, the main morphological change from the normal type into the coastal ecotype of A. triphylla var. japonica is the increase in leaf size, suggesting that the coastal ecotype may have evolved from the normal type via a heterochronic process.

关键词： Adaptation Adenophora triphylla var. japonica Coastal Ecotype Heterochronic Leaf Thickness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Introgressive Hybrids of Arisaema sikokianumand A. tosaense(Araceae) Confirmed through Nuclear and Chloroplast DNA Comparisons

引用

American Journal of Plant Sciences 2011年第3期2卷 303-307页

作者： Hiroshi Hayakawa Hidenori Hamachi Kanako Matsuyama Yuko Muramatsu Yukio Minamiya Katsura Ito Jun yokoyama tatsuya Fukuda 不详

Morphologically putative introgressive hybrids of Arisaema sikokianum Franch. et Sav. and A. tosaense Makino were newly found in Kochi and Tokushima Prefectures in Japan. All the individuals have the same morphological characteristics as A. tosaense excluding a purple spathe. Molecular analysis using PCR-RFLP of internal transcribed spacer (ITS) in nuclear DNA (nrDNA) indicates that these putative introgressive hybrids have the same pattern as A. tosaense. Moreover, the sequences of chloroplast DNA (cpDNA) of the putative introgressive hybrids were identical to A. sikokianum from Kochi Prefecture and A. tosaense from Tokushima Prefecture. The results suggest that the plants are introgressive hybrids of A. sikokianum and A. tosaense and that they have highly exchanged genes with A. tosaense.

关键词： Araceae Arisaema A. sikokianum A. tosaense Chloroplast Capture Introgression ITS Molecular Analysis PCR-RFLP Trn

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：