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橙皮提取物对猪油的抗氧化能力的研究 总被引:6,自引:0,他引:6
在温度为60℃和9天时间内,在100g猪油中分别加入0.02g的乙醇、乙醚和乙酸乙酯的橙皮提取物和0.02g的二丁基羟基甲苯(BHT),测得猪油过氧化值(POV)依次为0.111、0.0966、0.0738和0.0835meq/kg。同样条件下,未加抗氧化剂的猪油POV为1.038meq/kg。这说明橙皮提取物对猪油有显著的抗氧化能力。乙酏乙酯的橙皮提取物抗氧化能力甚至优于BHT。 相似文献
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液化猪油的溶剂分离研究 总被引:4,自引:0,他引:4
本对溶剂结晶法分离液化猪油的工艺作了详细的研究,从新鲜猪油中可分离出常温下呈液态,碘值较植物油脂低的液化猪油,并发现在溶剂中加入少量添加剂,可提高分离效率。该液化猪油作为抗生素发酵的消沫剂,在利福霉素的发酵试验中应用,利福霉素发酵效价比原工艺有较大提高。 相似文献
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食品添加剂是指在食品生产、加工、保藏等过程中,为防腐、改善色香味和品质而加入的化学合成或天然物质。试验证明,几种食品添加剂同时加入食品,有“增效作用”或“协同作用”。例如,有人用AOM(活性氧化)法,对猪油做过抗氧化试验。当猪油含有0.01%BHA(丁基羟基茴香醚)时,猪油到达20毫克当量过氧化物的数值需要5小时,而猪油含有0.0515%BHA、0.0075%BHT(二丁基羟基甲苯)、0.0045%PG(没食子酸丙酯)和0.0045%CA(柠檬酸)时,猪油到达20毫克当量过氧化物的数值,则需要70小时。就是 相似文献
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<正> 一、引言众所周知,目前我国猪油的产量日益上升,而人们对肥肉的要求量却日趋下降,如何充分利用这个价廉易得又丰富的猪油资源,做到物尽其用,增加产品,提高经济效益,为国家创造财富,为民造福。因此,对猪油的综 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献