A 13-day feeding trial was carried out to evaluate the effectiveness of a microbound diet for rearing the larvae of Chinese shrimp Fenneropenaeus chinensis in comparison with the live foods that consist of Isochrysis ...A 13-day feeding trial was carried out to evaluate the effectiveness of a microbound diet for rearing the larvae of Chinese shrimp Fenneropenaeus chinensis in comparison with the live foods that consist of Isochrysis galbana, Chlorella vulgaris, Tetraselrnis chuii, rotifer （Brachionus plicatilis） and Arternia sp. Larvae of 0 to 13d post-hatch （dph） were reared in a temperature-controlled semi-open culture system and stocked at a density of 100 larvae L^-1 in tanks, each containing 50 L sterilized seawater with salinity 30-32. Larvae were manually fed either the live foods or the microbound diet 6 times per day. At 13 dph, the growth of the larvae fed on the microbound diet was approximately 84% of that fed on the live foods. The survival rate of the larvae fed on the microbound diet was 44.29% at 13dph, which was not significantly different from that of larvae fed on live foods （63.55%）. The body length and development index （DI） of the larvae fed on the microbound diet were always lower than those of larvae fed on live foods. However, the differences reached significant levels only at 11 and 13 dph （P〈 0.05）. The mean dry weight loss of the microbound diet was 9.2% after 90 min immersion in seawater, indicating that this diet has a good water stability. The microbound diet contains 52.23% crude protein and 10.27% lipid and is easy to prepare. These characteristics of the diet suggest good potentials for its successful use in the larviculture of other penaeid and fish species.展开更多
With an aim to reduce leaching of water soluble vitamins, the leaching properties of five kinds of microparticulate forms of vitamin B 1 are investigated by means of dynamic system. These microparticles include: algin...With an aim to reduce leaching of water soluble vitamins, the leaching properties of five kinds of microparticulate forms of vitamin B 1 are investigated by means of dynamic system. These microparticles include: alginate and alginate CMC microcapsules prepared by emulsion coacervation process (ECP), alginate and gelatin microcapsules prepared by spray drying process (SDP), and alginate microbound. The results show these five microparticulate forms of VB 1 can reduce leaching significantly compared to crystalline form VB 1, and the leaching rates at different intervals, diameters and encapsulation efficiencies ( EE ) are significantly different among all kinds of microparticles (ANOVA, P <0.05). The leaching properties of the five microparticles are in accord with Higuchi equation. Based on the regression equation, the half loss time ( T 50 ) is determined.In conclusion, the alginate CMC microencapsule is a potential tool to reduce leaching of water soluble vitamins.展开更多
基金supported by the National 863 Program(Nos.2001AA622060,2003AA622060,2004AA603610).
文摘A 13-day feeding trial was carried out to evaluate the effectiveness of a microbound diet for rearing the larvae of Chinese shrimp Fenneropenaeus chinensis in comparison with the live foods that consist of Isochrysis galbana, Chlorella vulgaris, Tetraselrnis chuii, rotifer （Brachionus plicatilis） and Arternia sp. Larvae of 0 to 13d post-hatch （dph） were reared in a temperature-controlled semi-open culture system and stocked at a density of 100 larvae L^-1 in tanks, each containing 50 L sterilized seawater with salinity 30-32. Larvae were manually fed either the live foods or the microbound diet 6 times per day. At 13 dph, the growth of the larvae fed on the microbound diet was approximately 84% of that fed on the live foods. The survival rate of the larvae fed on the microbound diet was 44.29% at 13dph, which was not significantly different from that of larvae fed on live foods （63.55%）. The body length and development index （DI） of the larvae fed on the microbound diet were always lower than those of larvae fed on live foods. However, the differences reached significant levels only at 11 and 13 dph （P〈 0.05）. The mean dry weight loss of the microbound diet was 9.2% after 90 min immersion in seawater, indicating that this diet has a good water stability. The microbound diet contains 52.23% crude protein and 10.27% lipid and is easy to prepare. These characteristics of the diet suggest good potentials for its successful use in the larviculture of other penaeid and fish species.
文摘With an aim to reduce leaching of water soluble vitamins, the leaching properties of five kinds of microparticulate forms of vitamin B 1 are investigated by means of dynamic system. These microparticles include: alginate and alginate CMC microcapsules prepared by emulsion coacervation process (ECP), alginate and gelatin microcapsules prepared by spray drying process (SDP), and alginate microbound. The results show these five microparticulate forms of VB 1 can reduce leaching significantly compared to crystalline form VB 1, and the leaching rates at different intervals, diameters and encapsulation efficiencies ( EE ) are significantly different among all kinds of microparticles (ANOVA, P <0.05). The leaching properties of the five microparticles are in accord with Higuchi equation. Based on the regression equation, the half loss time ( T 50 ) is determined.In conclusion, the alginate CMC microencapsule is a potential tool to reduce leaching of water soluble vitamins.
