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Characterization of Acid-Soluble Collagen from Skins of Surf smelt (Hypomesus pretiosus japonicus Brevoort)

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Food and Nutrition Sciences 2010年第2期1卷 59-66页

作者： Takeshi Nagai 不详

Acid-soluble collagen was extracted from the skins of surf smelt and characterized. The yield of collagen was high about 24.0% on a dry weight basis. By SDS-polyacrylamide gel electrophoresis and CM-Toyopearl 650 M column chromatography, this collagen is a heterotrimer with a chain composition of α1α2α3. The denaturation temperature was 32.5℃, about 4.5℃ lower than that from porcine skin. Attenuated total reflectance-fourier transform infrared analysis showed that the percentage of secondary structural components in this collagen were 11% α-helix, 34% β-sheet, 19% β-turn, and 21% others. It suggests that the triple helical structure is present in the acid-soluble collagen from the skins of the surf smelt in comparison to that from the skin of porcine.

关键词： Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) Analysis Collagen Denaturation Temperature Skin Surf smelt

Factors Affecting Japanese Pond smelt (<i>Hypomesus nipponensis</i>) Stock Trajectory in Lake Kasumigaura and Kitaura

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Open Journal of Marine Science 2015年第2期5卷 210-225页

作者： Ashneel Ajay Singh Noriyuki Sunoh Shintaro Niwa Fumitaka Tokoro Daisuke Sakamoto Naoki Suzuki Kazumi Sakuramoto Department of Ocean Science and Technology Tokyo University of Marine Science and Technology TokyoJapan Freshwater Branch Office Ibaraki Fisheries Research Institute Ibaraki Japan

The Japanese pond smelt (Hypomesus nipponensis) stock has been observed to fluctuate quite rigorously over the years with sustained periods of low catch in Lake Kasumigaura and Kitaura of the Ibaraki prefecture, Japan which would adversely affect the socioeconomic livelihood of the local fishermen and fisheries industry. This study was aimed at determining the factors affecting the stock fluctuation of the pond smelt through the different years in the two lakes. Through exploratory analysis it was found that the pond smelt had significant relationship with total phosphorus (TP) level in both lakes. The global mean land and ocean temperature index (LOTI) was also found to be indirectly related to the pond smelt stock in lake Kasumigaura and Kitaura at the latitude band of 24°N to 90°N (l). Both TP and LOTI had inverse relationship with pond smelt trajectory in both lakes. For both Lake Kasumigaura and Kitaura, TP for the individual lakes and LOTI (l) were used as independent variables using generalized linear model and response surface methods for modeling the stock dynamics of the pond smelt in the two lakes. Model selection was based on significant parameter estimates (p smelt population. When management decisions are being made regarding pond smelt fishery and sustainability plans in the Ibaraki prefecture, the effects of TP and LOTI should be taken into account. Future research needs to be directed towards deeper understanding the mechanisms by which TP and LOTI affect pond smelt population in Lake Kasumigaura and Kitaura for more effective management.

关键词： Pond smelt Lake Kasumigaura Lake Kitaura Phosphorus Surface Temperature

The Ministry of Land and Resources Considered to Release the Exploration and Approval Authority of Mineral to Private Enterprises for Embracing More Opportunities

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China Nonferrous Metals Monthly 2014年第1期 4-5页

"There is a great room in market-oriented reform."This is the common view expressed by many experts of this *** personage concerned even disclosed that the Ministry of Land and Resources was pushing a number of reform... 详细信息

关键词： Authority approval Release ferrous concerned smelt

Leap-Forward Development of China's Copper Processing Industry

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China Nonferrous Metals Monthly 2011年第3期 1-4页

In 2011, China’s copper processing industry bid farewell to the 11th Five-Year Plan Period and came to the 12th Five-Year Plan Period. The past 5 years was a short period for development of an industry, however, it w... 详细信息

关键词： Forward friendly producing constantly saving smelt

China Northern Rare Earth Group Completed Integration of 6 Enterprises in Inner Mongolia

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China Nonferrous Metals Monthly 2015年第10期 7-页

On September 11,China Northern Rare Earth Group,which is located in Baotou,Inner Mongolia,disclosed to the public that up till now it has finished integration of 6 rare earth enterprises in Inner Mongolia,integration ... 详细信息

关键词： Baotou schedule remaining completed finished smelt