Dr. Yohei Sato's donation to PAWEES     

Yutaka Matsuno 《Paddy and Water Environment》2005,3(4):251-251

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Effect of moisture content of a wood matrix on a small-scale biodegradation system for organic solid waste     

Sakae Horisawa  Yutaka Tamai  Yoh Sakuma  Shuichi Doi  Minoru Terazawa 《Journal of Wood Science》2000,46(4):317-321

The optimum working moisture content of a wood matrix for the garbage automatic decomposer-extinguisher (GADE) machine was investigated using a small-scale degradation reactor. A formula feed for rabbits was used as the model waste. The degradation experiment was conducted under controlled conditions such as moisture content, environmental temperature, and airflow rate. The degradation rate was estimated precisely from weight loss and the CO₂ evolution rate. The degradation rate were nearly constant at a moisture content of 30%–80% on a-wet-weight basis. Microorganisms from the environment propagated in the reactor with no inoculums added. The number of microorganisms showed a trend similar to that of the degradation rate. The microorganism community changed according to the moisture content of the matrix and were considered to attain a constant degradation rate at a wide range of moisture content of a matrix.Part of this report was presented at the 49th annual meeting of the Japan Wood Research Society, Tokyo, April 1999  相似文献   

First step of non‐fish meal,non‐fish oil diet development for red seabream, (Pagrus major), with plant protein sources and microalgae Schizochytrium sp     

Taekyoung Seong  Hisao Matsutani  Yutaka Haga  Renato Kitagima  Shuichi Satoh 《Aquaculture Research》2019,50(9):2460-2468

A feeding experiment was conducted to develop non‐fish meal and non‐fish oil diet for red seabream by using plant protein source and Schizochytrium meal which is rich in 22:6n‐3 (DHA). Three iso‐nitrogenous and iso‐lipidic experimental diets were prepared (CP 41.2% ± 0.4%, CL 16.4% ± 1%). Control diet contained both fish meal (40%) and fish oil (6%). In the second diet, fish meal was replaced by plant meals (soy protein concentrate, soybean meal, corn gluten meal) [FO]. In the third diet, fish meal and fish oil were replaced by algae meal (Schizochytrium sp. powder) and plant proteins [AO]. Duplicated groups of juvenile red seabream (8.8 g ± 1.5) were fed the experimental diets for 12 weeks to near satiation. There was no statistical difference among treatment in specific growth rate. Feed conversion ratio of AO diet group was higher than that of control. In wet basis, whole body protein level was significantly higher in AO diet than FO group while lipid content was lower than control group. In fatty acid profile, AO group had significantly lower 18:4n‐3, 20:4n‐3, 22:5n‐3 and 20:5n‐3 (EPA) level, but significantly higher 18:3n‐3 and DHA level than the other two diet fed fish. The results might suggest that further developments in microalgae diet offer a promising lipid source of n‐3 PUFA as essential fatty acid on marine fish. And it showed possibility to develop non‐fish meal and non‐fish oil feed for marine aquaculture fish by using microalgae.  相似文献   

Development of a technique to estimate the horizontal distribution of lit fishing vessels in the East China Sea using satellite luminescence     

Saito  Rui  Sasaki  Hiroaki  Yamada  Haruya  Hiroe  Yutaka  Inagake  Denzo  Saito  Tsutomu 《Fisheries Science》2020,86(1):13-25

Fisheries Science - The East China Sea is a semi-enclosed sea, surrounded by Japan, China, South Korea and Taiwan, and is continuously influenced by lit fishing vessels overexploiting fishery...  相似文献   

Discrimination of nursery locations of juvenile Japanese flounder Paralichthys olivaceus on the Pacific coast of northern Japan based on carbon and nitrogen stable isotope ratios     

Kato  Yoshikazu  Togashi  Hiroyuki  Kurita  Yutaka  Kamauchi  Hiromitsu  Tayasu  Ichiro 《Fisheries Science》2020,86(4):615-623

Fisheries Science - To test whether stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) can be used to understand the ecological connectivity of Japanese flounder Paralichthys...  相似文献   

Non‐fish meal,non‐fish oil diet development for red sea bream,Pagrus major,with plant protein and graded levels of Schizochytrium sp.: Effect on growth and fatty acid composition     

Taekyoung Seong  Renato Kitagima  Yutaka Haga  Shuichi Satoh 《Aquaculture Nutrition》2020,26(4):1173-1185

A feeding experiment was conducted to determine the optimal formulation level of algae meal, which is rich in docosahexaenoic acid (DHA), in a non‐fish meal diet. Six iso‐nitrogenous (450 g/kg) and iso‐lipidic (130 g/kg) experimental diets were prepared. The control diet was formulated with fish meal (400 g/kg), fish oil (60 g/kg), plant protein sources (220 g/kg) and rapeseed oil (50 g/kg). Plant protein sources (soy protein concentrate, soybean meal and corn gluten meal), rapeseed and fish oil were formulated in the second diet (NFM + FO). In the third diet, fish oil of the NFM + FO diet was replaced by rapeseed oil (NFM + NFO) and designated as the negative control. In the other three diets, rapeseed oil in the NFM + NFO diet was replaced with algae meal (Schizochytrium sp. powder) at 50 g/kg, 100 g/kg and 150 g/kg (AM5, AM10 and AM15, respectively). Triplicate groups of juvenile red sea bream (8.8 g) were fed the experimental diets for 12 weeks near satiation. The growth was lowest in the fish fed NFM + NFO diet. This was improved by the formulation of algae meal, which reached the growth level of the NFM + FO group in the AM10 group. The lipid content of the whole fish body in the NFM + NFO group was significantly lower than those of other groups. The fatty acid profile showed significant differences among dietary treatments. DHA content in total and polar lipids of the whole body and liver was highest in the AM10 and AM15 groups. These results reconfirm that microalgae are a suitable lipid source for the replacement of dietary fish oil for marine fish, and the optimal level was estimated as 50 g/kg?100 g/kg in diet.  相似文献   

Cloning and nutritional regulation of polyunsaturated fatty acid desaturase and elongase of a marine teleost,the nibe croaker <Emphasis Type="Italic">Nibea mitsukurii</Emphasis>     

Yoji Yamamoto  Naoki Kabeya  Yutaka Takeuchi  Alimuddin  Yutaka Haga  Shuichi Satoh  Toshio Takeuchi  Goro Yoshizaki 《Fisheries Science》2010,76(3):463-472

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Collection,preservation and distribution of Oryza genetic resources by the National Bioresource Project RICE (NBRP-RICE)     

Yutaka Sato  Katsutoshi Tsuda  Yoshiyuki Yamagata  Hiroaki Matsusaka  Hiromi Kajiya-Kanegae  Yuri Yoshida  Ayumi Agata  Kim Nhung Ta  Sae Shimizu-Sato  Toshiya Suzuki  Misuzu Nosaka-Takahashi  Takahiko Kubo  Shoko Kawamoto  Ken-Ichi Nonomura  Hideshi Yasui  Toshihiro Kumamaru 《Breeding Science》2021,71(3):291

Biological resources are the basic infrastructure of bioscience research. Rice (Oryza sativa L.) is a good experimental model for research in cereal crops and monocots and includes important genetic materials used in breeding. The availability of genetic materials, including mutants, is important for rice research. In addition, Oryza species are attractive to researchers for both finding useful genes for breeding and for understanding the mechanism of genome evolution that enables wild plants to adapt to their own habitats. NBRP-RICE contributes to rice research by promoting the usage of genetic materials, especially wild Oryza accessions and mutant lines. Our activity includes collection, preservation and distribution of those materials and the provision of basic information on them, such as morphological and physiological traits and genomic information. In this review paper, we introduce the activities of NBRP-RICE and our database, Oryzabase, which facilitates the access to NBRP-RICE resources and their genomic sequences as well as the current situation of wild Oryza genome sequencing efforts by NBRP-RICE and other institutes.  相似文献   

Purification and characterization of glycerolipid acyl-hydrolase from the red alga Gracilaria vermiculophylla     

Muhammad I Illijas  Masaru Terasaki  Ryo Nakamura  Noriaki Iijima  Akihiko Hara  Nobuhiro Fusetani  Yutaka Itabashi 《Fisheries Science》2008,74(3):670-676

ABSTRACT:   A glycerolipid acyl-hydrolase was purified 19-fold with a yield of 11% from the prostaglandin-producing red alga Gracilaria vermiculophylla by ammonium sulfate precipitation, anion-exchange chromatoraphy and gel filtration chromatography. Sodium dodecylsulfate– polyacrylamide gel electrophoresis of the final preparation showed a single band corresponding to a molecular mass of 20 kDa, but Superdex 200 fast protein liquid chromatography exhibited a molecular mass of 40 kDa. Accordingly, it was suggested that the purified enzyme was a homodimer of a 20 kDa subunit. The optimal temperature and pH were 37°C and 7–8, respectively. The purified enzyme catalyzed hydrolysis of the acyl groups of both glycoglycerolipids and phospholipids, especially monogalactosyldiacylglycerol and phosphatidylcholine. These results suggest that the enzyme hydrolyze the membrane lipids of the alga to release various saturated and unsaturated fatty acids, including arachidonic acid as substrate for prostaglandin synthesis.  相似文献