- 著者
- Yuki Endo Fubito Toyama Chikafumi Chiba Hiroshi Mori Kenji Shoji
- 出版者
- 一般社団法人 情報処理学会
- 雑誌
- IPSJ Transactions on Bioinformatics (ISSN:18826679)
- 巻号頁・発行日
- vol.8, pp.2-8, 2015 (Released:2015-01-27)
- 参考文献数
- 14
Sequencing the whole genome of various species has many applications, not only in understanding biological systems, but also in medicine, pharmacy, and agriculture. In recent years, the emergence of high-throughput next generation sequencing technologies has dramatically reduced the time and costs for whole genome sequencing. These new technologies provide ultrahigh throughput with a lower per-unit data cost. However, the data are generated from very short fragments of DNA. Thus, it is very important to develop algorithms for merging these fragments. One method of merging these fragments without using a reference dataset is called de novo assembly. Many algorithms for de novo assembly have been proposed in recent years. Velvet and SOAPdenovo2 are well-known assembly algorithms, which have good performance in terms of memory and time consumption. However, memory consumption increases dramatically when the size of input fragments is larger. Therefore, it is necessary to develop an alternative algorithm with low memory usage. In this paper, we propose an algorithm for de novo assembly with lower memory. In our experiments using E.coli K-12 strain MG 1655 and human chromosome 14, the memory consumption of our proposed algorithm was less than that of other popular assemblers.
- 著者
- Hiroshi MORI Tetsuya TOKIWA Hiroki MIZUMURA Kohei YOSHIKAWA Yuki NOBE Yui KOUKETSU
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Journal of Mineralogical and Petrological Sciences (ISSN:13456296)
- 巻号頁・発行日
- pp.221215, (Released:2023-04-14)
We estimated the protolith age and peak metamorphic temperature of the Yokokawagawa metamorphic rocks (YMR) east of the Itoigawa–Shizuoka Tectonic Line using detrital zircon U–Pb dating and Raman carbonaceous material geothermometry, respectively. U–Pb dating of a psammitic rock yielded a youngest age of ∼100 Ma, which corresponds to the protolith age. Raman carbonaceous material geothermometry results for five pelitic rock samples give metamorphic temperatures of ∼350–380 °C. The protolith age is consistent with those of the Sanbagawa metamorphic rocks (SMR), strongly indicating that the YMR are an extension of the SMR. The increase in peak temperature toward intrusive rocks along the eastern margin of the YMR may indicate that the relatively young ages yielded by previous K–Ar dating of the YMR reflect thermal resetting due to contact metamorphism.
- 著者
- Taro Uchiyama Yusuke Nakano Osamu Ueda Hiroshi Mori Masaya Nakashima Akira Noda Chiaki Ishizaki Masako Mizoguchi
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Journal of Health Science (ISSN:13449702)
- 巻号頁・発行日
- vol.54, no.5, pp.559-566, 2008 (Released:2008-10-01)
- 参考文献数
- 19
- 被引用文献数
- 63 73
We examined the effect of oral intake of pure glucosylceramide derived from konjac extract on skin barrier function evaluated by transepidermal water loss (TEWL) in hairless mice with sodium dodecyl sulfate (SDS)-induced skin roughness. The difference of TEWL between SDS-treated site and untreated sites in the pure glucosylceramide-fed group was significantly lower than that in control group on day 14 of ingestion. We investigated interleukin-1α (IL-1α) production in the hairless mouse skin, and it was significantly lower in the glucosylceramide-fed group than that of control animals. This reduced IL-1α production should contribute to improvement of skin barrier function. To investigate the effect of oral intake of glucosylceramide in human, we conducted a randomized double-blind placebo-controlled study including 100 healthy subjects whose TEWL in cheek was relatively high. As a result, cheek TEWL was significantly lower in the test product group as compared with the control group in weeks 8 and 12 of ingestion (p=0.023 and p=0.002 respectively).