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Ullah SM Murphy B Dorich B Richter B Srinivasan K 《Journal of agricultural and food chemistry》2011,59(6):2169-2174
This paper describes a new in-cell method for pursuing accelerated solvent extraction (ASE) prior to lipid analysis from food samples. It is difficult to pursue direct ASE with acid- or base-hydrolyzed samples due to the corrosive nature of the reagents and material limitations. In this study ion exchange based materials were used to remove acid or base reagents in-cell without compromising the recovery of lipids. The performance data are presented here for the new methods for lipid extraction for a variety of food samples and compared to the Mojonnier method. NIST Standard Reference Materials (SRM-1546 and SRM-1849) were used to validate the ASE methods. Excellent fat recoveries were obtained for the ASE methods. The new methods presented here enhance the utility of ASE and eliminate labor intensive protocols. 相似文献
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The effect of time‐dependent protein restriction on growth factors,nonspecific immunity,body composition,fatty acids and amino acids in the Siberian sturgeon (Acipenser baerii) 
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下载免费PDF全文 Rahmat Hosseinpour Aghaei Abdolmohammad Abedian Kenari Mohammad Ali Yazdani Sadati Mohammad Esmaeili 《Aquaculture Research》2018,49(9):3033-3044
The effect of time‐dependent protein restriction (PR) and refeeding were investigated on growth, body composition, fatty acids (FA), amino acids (AA) and nonspecific immune functions in the juvenile Siberian sturgeon (Acipenser baeri; 75 ± 5 g). Test diets included: T1 (control) and T2 fish fed diets containing 400 and 300 g/kg protein respectively during the whole experimental period, T3 (every other day) and T4 (every other week) fish were fed diets containing 300 g/kg protein (PR) and refeeding with diet containing 400 g/kg protein respectively, and T5 fish fed a diet containing 300 g/kg protein for 3 weeks and a diet containing 400 g/kg protein for 5 weeks, were fed to the fish for 56 days by visual satiation. Unlike ration T2 and T5, feeding treatments of T3 and T4 showed an increase in fish growth and body composition (p < 0.05) and they were very close to the control group (p > 0.05). Regarding the fatty acid profile, although the percentage of highly unsaturated fatty acids (HUFA) and polyunsaturated fatty acids (PUFA) declined significantly in the T2 and T5 groups, the saturated fatty acid (SFA) and monounsaturated fatty acids (MUFA) indicated no change among the treatments. In addition, the T2 and T5 groups demonstrated a reduction in essential amino acids (EAA) with a simultaneous increase in nonessential amino acids (NEAAs), which was significant from that of controls and other groups (p < 0.05). In terms of nonspecific immune parameters (serum lysozyme activity and alternate complement activity [ACH50]), treatment 3 has an appropriate result that did not have a significant difference with the control group (p > 0.05), but there was significant difference with other groups (p < 0.05). As a result, the T3 treatment can be used in sturgeon aquaculture practically without any negative impacts on biological or physiological indices. 相似文献
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The carbohydrates content of the water soluble and water insoluble material of the oil and sago palm trunk waste were analysed.
The sago palm trunk waste yielded higher water soluble content (17.4%) compared to the parenchymatous tissues and fibers of
the oil palm trunk waste i.e. 3.3% and 5.4%, respectively, with less than 10% of neutral carbohydrates detected by cysteine sulphuric assay. However, hot
water solubles of the sago palm trunk contained about 61.7% glucose. On the other hand, the acid hydrolysable carbohydrates
of the water insoluble materials of both oil and sago palm trunk waste were found to be less than 50% of the total materials.
The fibers and parenchyma of the oil palm trunk yielded only 31.9% and 23.6% hydrolysable sugars, respectively. Glucose was
the major monosaccharide afforded by all samples of oil and sago palm waste.
Received 26 November 1998 相似文献
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Nordiana Nordin Zainul Akmar Zakaria Wan Azlina Ahmad 《Water, air, and soil pollution》2012,223(4):1649-1659
The potential of heat and chemically treated rubber wood shavings (RWS) to remove Cu(II) and Ni(II) was evaluated at bench-scale by varying parameters such as initial Cu(II) and Ni(II) concentrations, contact time and adsorbent dosage. Maximum Cu(II) and Ni(II) uptake was achieved using NaOH-treated RWS after 5 h of contact time, pH 5.0 (Cu), 5.5 (Ni) and 6.0 (mixed-metal solution), initial Cu(II) and Ni(II) of 100 mg L?1 and RWS dosage of 0.3% (w/v). Point of zero charge (pHPZC) value of 4.35 suggests the appropriateness of pH range used. Higher Cu(II) and Ni(II) adsorption following NaOH treatment was due to smaller average pore diameter (34.63 Å), higher mesopore content and higher surface negativity charge. EDAX analysis confirmed the presence of Cu and Ni on the surface of the RWS. The importance of carboxyl and hydroxyl functional groups during Cu(II) and Ni(II) removal is supported by the FTIR analysis and good correlation (R 2 of 0.96–0.99) with the pseudo-second-order adsorption kinetic model. The results indicate the potential of using RWS as an alternative adsorbent to remove Cu(II) and Ni(II) from industrial wastewaters. 相似文献
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Wilt disease with unknown etiology causes mass mortality in commercial Acacia mangium nurseries in South Sumatra. This pathogen induces symptoms of chlorosis in... 相似文献
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Wan Azlina Ahmad Zainul Akmar Zakaria Firdausi Razali Jefri Samin 《Water, air, and soil pollution》2009,204(1-4):195-203
The purpose of this study is to evaluate the combined Cr(VI) removal capacities of nonliving (untreated rubber wood sawdust, URWS) and living biomass (URWS-immobilized Acinetobacter haemolyticus) in a continuous laboratory scale downward-flow two column system. Synthetic solutions of Cr(VI) between 237 and 320 mg L?1 were mixed with 1 g L?1 brown sugar in a nonsterile condition. Final Cr(VI) of between 0 and 1.6 mg L?1 indicate a Cr(VI) removal capacity of 99.8–100%. The bacterial Cr(VI) reduction capacity increased with column length. This study shows the feasibility of using the two column system consisting of living (bacteria) and nonliving biomass (URWS) as a useful alternative treatment for Cr(VI) contamination in the aqueous system. 相似文献