Adult (ADS) and larva stages of palm weevil Rhynchophorus phoenicis were analyzed for their nutritional potentials using proximate and mineral contents as indices. The early larva stage (ELS) contains the highest mois...Adult (ADS) and larva stages of palm weevil Rhynchophorus phoenicis were analyzed for their nutritional potentials using proximate and mineral contents as indices. The early larva stage (ELS) contains the highest moisture content of 11.94% while ADS has the least value of 4.79%. The late larva stage (LLS) has the highest protein content of 10.51% while ADS contains 8.43%. Ash content is highest in ELS with a value of 2.37% and lowest in ADS with a value of 1.43%. ELS and LLS have the highest (22.14%) and lowest (17.22%) fibre contents respectively. The values of potassium, magnesium and iron in ELS were (455.00±21.21), (60.69±2.57) and (6.50±3.40) mg/kg while LLS recorded (457.50±10.61), (43.52±1.37) and (6.00±1.10) mg/kg and ADS recorded (372.50±24.75), (53.31±1.88) and (22.90±3.70) mg/kg. Chromium, phosphorus, nickel, calcium, lead, man- ganese and zinc were also detected. Copper was not detected in any of the samples. In all the developmental stages the protein solubilities were pH dependent with the minimum protein solubilities occurring at acidic pH while the maximum protein solu- bilities occurred at alkaline pH.展开更多
Ⅰ. INTRODUCTIONAlthough β-D-fucosidase (β-D-fucoside fucohydrolase, EC 3.2.1.38 ) has been isolated from various sources, the identity of this enzyme is still not settled. The β-D-fucosidases (Fuc-ase) activity li...Ⅰ. INTRODUCTIONAlthough β-D-fucosidase (β-D-fucoside fucohydrolase, EC 3.2.1.38 ) has been isolated from various sources, the identity of this enzyme is still not settled. The β-D-fucosidases (Fuc-ase) activity listed in the latest Enzyme Nomenclature were all associated with展开更多
In many developing and underdeveloped economy,many people live below the poverty line.The cost of food with essential nutrients are relatively high and consequently scarcely affordable to low income earners.Unfortunat...In many developing and underdeveloped economy,many people live below the poverty line.The cost of food with essential nutrients are relatively high and consequently scarcely affordable to low income earners.Unfortunately,certain nutrient sources can beneglected by local people,and thus encourage the danger of species extinction.This study was carried out to determine the basic nutrient compositions of the larvae of Raphia Palm Weevils.Nutritional components such as the proximate,mineral and vitamincompositions were determined.Proximate analysis of the sample was carried out according to standard methods as described in AOAC.Mineral compositions were determined using Atomic Absorption Spectrophotometer.Vitamins were assayed using standard colorimetric and titration methods.The results show relatively high mean moisture content,39.95±0.95%;indicating that the bulk of the larvae constitute water.Mean concentrations of crude protein,crude fibre and crude fat(23.48±1.13%,13.18±0.32%and 17.38±0.49%)were high.Mineral analysis(mg/100g)revealed very high levels of calcium,221.24±0.59;magnesium,56.88±0.16;iron,18.70±0.76;zinc,15.14±0.05;potassium,8.77±0.08 and sodium,6.72±0.14.The larva was found to be rich in vitamin C,440.00±39.66 mg/100g;vitamin A,15.74±1.08 mg/100g and vitamin B6,72.75±4.75 mg/100g;with a low level of vitamin E,2.59±0.14 mg/100g;implying that the larva could be good supplements for these nutrients.展开更多
文摘Adult (ADS) and larva stages of palm weevil Rhynchophorus phoenicis were analyzed for their nutritional potentials using proximate and mineral contents as indices. The early larva stage (ELS) contains the highest moisture content of 11.94% while ADS has the least value of 4.79%. The late larva stage (LLS) has the highest protein content of 10.51% while ADS contains 8.43%. Ash content is highest in ELS with a value of 2.37% and lowest in ADS with a value of 1.43%. ELS and LLS have the highest (22.14%) and lowest (17.22%) fibre contents respectively. The values of potassium, magnesium and iron in ELS were (455.00±21.21), (60.69±2.57) and (6.50±3.40) mg/kg while LLS recorded (457.50±10.61), (43.52±1.37) and (6.00±1.10) mg/kg and ADS recorded (372.50±24.75), (53.31±1.88) and (22.90±3.70) mg/kg. Chromium, phosphorus, nickel, calcium, lead, man- ganese and zinc were also detected. Copper was not detected in any of the samples. In all the developmental stages the protein solubilities were pH dependent with the minimum protein solubilities occurring at acidic pH while the maximum protein solu- bilities occurred at alkaline pH.
基金Project supported by the National Natural Science Foundation of China, Bio 85-124(to Z.S.-z.) and Grant DMB 86-17033 from National Science Foundation(to L. Y-t.).
文摘Ⅰ. INTRODUCTIONAlthough β-D-fucosidase (β-D-fucoside fucohydrolase, EC 3.2.1.38 ) has been isolated from various sources, the identity of this enzyme is still not settled. The β-D-fucosidases (Fuc-ase) activity listed in the latest Enzyme Nomenclature were all associated with
文摘In many developing and underdeveloped economy,many people live below the poverty line.The cost of food with essential nutrients are relatively high and consequently scarcely affordable to low income earners.Unfortunately,certain nutrient sources can beneglected by local people,and thus encourage the danger of species extinction.This study was carried out to determine the basic nutrient compositions of the larvae of Raphia Palm Weevils.Nutritional components such as the proximate,mineral and vitamincompositions were determined.Proximate analysis of the sample was carried out according to standard methods as described in AOAC.Mineral compositions were determined using Atomic Absorption Spectrophotometer.Vitamins were assayed using standard colorimetric and titration methods.The results show relatively high mean moisture content,39.95±0.95%;indicating that the bulk of the larvae constitute water.Mean concentrations of crude protein,crude fibre and crude fat(23.48±1.13%,13.18±0.32%and 17.38±0.49%)were high.Mineral analysis(mg/100g)revealed very high levels of calcium,221.24±0.59;magnesium,56.88±0.16;iron,18.70±0.76;zinc,15.14±0.05;potassium,8.77±0.08 and sodium,6.72±0.14.The larva was found to be rich in vitamin C,440.00±39.66 mg/100g;vitamin A,15.74±1.08 mg/100g and vitamin B6,72.75±4.75 mg/100g;with a low level of vitamin E,2.59±0.14 mg/100g;implying that the larva could be good supplements for these nutrients.
