Studies of the constituents of Uruguayan propolis   总被引：4，自引：0，他引：4  

Kumazawa S  Hayashi K  Kajiya K  Ishii T  Hamasaka T  Nakayama T 《Journal of agricultural and food chemistry》2002,50(17):4777-4782

Eighteen flavonoids including two new compounds, four aromatic carboxylic acids, and eleven phenolic acid esters including one new compound were isolated and identified from the ethyl acetate soluble fraction of the 70% ethanol extract of Uruguayan propolis. The new compounds were elucidated as pinobanksin 3-(2-methyl)butyrate (1; recently reported in Usia, T.; Banskota, A. H.; Tezuka, Y.; Midorikawa, K.; Matsushige, K.; Kadota, S. J. Nat. Prod. 2002, 65, 673-676) pinobanksin 3-isobutyrate (2), and 2-methyl-2-butenyl ferulate (24). The constituents isolated from Uruguayan propolis in this study were similar to those of propolis of European and Chinese origin. Thus, it is suggested that the Uruguayan propolis has a plant origin similar to those of propolis from Europe and China.  相似文献   

Two salmon gonadotropin-releasing hormone genes and their differential expressions in the goldfish Carassius auratus     

Hiroaki Suetake  Yasutoshi Yoshiura  Kiyoshi Kikuchi  Koichiro Gen  Motooki Ashihara  Makito Kobayashi and  Katsumi Aida 《Fisheries Science》2000,66(1):49-57

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Hemolymph vitellogenin levels during ovarian development in the kuruma prawn Penaeus japonicus     

Safiah Jasmani  Ichiro Kawazoe  Tung-Wei Shih  Yuzuru Suzuki and  Katsumi Aida 《Fisheries Science》2000,66(3):535-539

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优质高产抗病小麦新品种镇麦6号的选育与栽培技术要点   总被引：1，自引：1，他引：0  

陈爱大  朱传统  岳绪国  景德道 《江苏农业科学》2006,(5):37-38

镇麦6号(原名镇99018)系江苏丘陵地区镇江农业科学研究所选育的优质高产抗病小麦新品种,2005年9月通过江苏省农作物品种审定委员会审定并定名。1选育经过1994年春,用高产稳产综合性状好的扬麦158作母本,分蘖性强易争穗、抗病性好的镇麦1号为父本,通过有性杂交,采用系谱法选育。于1997年夏收,将F3中的20株优良单株赴昆明加代,并将其中15个株系混收升级鉴定,在鉴定中有11个株系的主要农艺性状仍有分离,继续选取优良单株。1999年夏收,在F6中将综合农艺性状趋向一致的10个株系进行升级鉴定试验。其中,鉴定号为“99018”株系表现突出,提升参加本…  相似文献   

Volatile compounds characterizing Tunisian Chemlali and Chétoui virgin olive oils     

Tena N  Lazzez A  Aparicio-Ruiz R  García-González DL 《Journal of agricultural and food chemistry》2007,55(19):7852-7858

A total of 33 virgin olive oil samples of the two main Tunisian cultivars, Chemlali and Chétoui, were characterized by their volatile compounds. The olive oil samples were obtained from olives harvested at four stages of ripeness in costal and inland farms of different geographical places. Major volatiles, mostly C6 and C5 compounds produced from linolenic and linoleic acids through the lipoxygenase cascade, were quantified by solid-phase microextraction-gas chromatography. Mathematical procedures allowed for the determination of the volatiles that not only are able to discriminate the olive oils by their olive cultivar (hexanal, E-2-hexenal, and total ketones) and ripeness (pentanal and 1-penten-3-one) but also contribute to their distinctive aroma. Finally, an electronic nose based on metal oxide sensors was checked for a rapid and at-line implementation of Tunisian olive oil varietal traceability. The classification of the samples by the sensors was explained by their sensitivity to volatiles E-2-hexanal, hexanal, 1-penten-3-one, ethanol, and Z-3-hexenol. Multivariate procedures of discriminant analysis and principal component analysis were used in the study.  相似文献   

Strategies for improving fuel efficiency in the Portuguese trawl fishery     

Joaquim Parente  Paulo Fonseca  Victor Henriques  Aida Campos 《Fisheries Research》2008,93(1-2):117-124

The recent rise in oil prices has brought renewed attention to energy savings in the fishing industry, and particularly in trawling. Coastal trawlers spend most of their time on fishing grounds near the coast. In such cases, the most successful energy-saving modifications ought to result from changes in the fishing gear and towing conditions. The purpose of this study was to identify the energy-economy potential for Portuguese fish trawlers after altering a vessel's operating conditions and improving its trawl gear performance. Two trawlers, named Tricana de Aveiro and João Macedo were selected as subjects in this project. Both vessels work with gear of similar design and size. Experimental sea trials were carried out to elucidate the actual vessel and gear performance. A model trawl was then built and tested in a flume tank, which provided the basis for improving the gear design. Full-scale trials were then carried out with both vessels using the modified trawls in order to assess changes in gear performance. The new trawls maintained their previous ability to catch species of different ecological groups and consumed less fuel at the same commercial trawling speed. An economic study showed potential increases in the net cash flow (NCF) of up to 27% over the range of operational navigation and trawling speeds. Having demonstrated the performance of the new trawls, the skippers of both vessels subsequently adopted the new design for commercial fishing.  相似文献   

Phenotypic characterization and cultivation conditions of inhibitor-producing fungus isolated from marine sediment     

Katsuhisa Yamada  Chiaki Imada  Masataka Uchino  Takeshi Kobayashi  Naoko Hamada-Sato  Katsumi Takano 《Fisheries Science》2008,74(3):662-669

ABSTRACT:   Tyrosinase inhibitor-producing fungus of Trichoderma sp. strain H1-7, which was isolated from marine sediment, was investigated by phylogenetic analysis and physiological characteristics. Phylogenetic analyses of the strain were similar to Trichoderma atroviride or T. viride . Physiological characteristics of the strain were similar to T. viride , and based on these results, it was identified as T. viride . Characterization of tyrosinase inhibitory activity of a culture supernatant of the strain was investigated. The inhibitory activity of the supernatant of the strain decreased after cultivation for more than 3 days. Furthermore, sea water was not essential for the production of the tyrosinase inhibitor (TI). When TI production of the strain was compared to T. viride , the strain showed higher activity than T. viride . From this result, it seemed that the strain had characteristic features comparable to T. viride , which was isolated from the terrestrial environment. As TI production of the strain showed higher potential than that of T. viride , it is necessary to elucidate the chemical structure of TI exemplified in the present study.  相似文献   

Long-term rearing of Japanese eel larvae using a liquid-type diet: food intake,survival and growth     

Okamura  Akihiro  Yamada  Yoshiaki  Horie  Noriyuki  Mikawa  Naomi  Tsukamoto  Katsumi 《Fisheries Science》2019,85(4):687-694

Fisheries Science - The efficiency of a new liquid-type diet for long-term rearing of Japanese eel larvae until metamorphosis was examined, as was the effect of diet viscosity on diet intake and on...  相似文献   

Evaluation from otolith Sr stable isotope ratios of possible juvenile growth areas of Japanese eels collected from the West Mariana Ridge spawning area     

Otake  Tsuguo  Amano  Yosuke  Shirai  Kotaro  Mochioka  Noritaka  Takahashi  Toshiro  Chow  Seinen  Kurogi  Hiroaki  Dou  Shouzeng  Yamaguchi  Asuka  Tsukamoto  Katsumi 《Fisheries Science》2019,85(3):483-493

Fisheries Science - The widely distributed East Asian Japanese eel Anguilla japonica constitutes a single genetically homogeneous population with a single spawning area near the West Mariana Ridge....  相似文献   

Up-regulation of tumor necrosis factor alpha mRNA is associated with bovine-leukemia virus (BLV) elimination in the early phase of infection.     

H Kabeya  K Ohashi  N Oyunbileg  Y Nagaoka  Y Aida  C Sugimoto  Y Yokomizo  M Onuma 《Veterinary immunology and immunopathology》1999,68(2-4):255-265

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