共查询到15条相似文献，搜索用时 625 毫秒
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壳聚糖涂膜对芒果的保鲜效应 总被引：5，自引：0，他引：5
王伟洲 《宁波职业技术学院学报》2006,10(2):105-107
探讨了不同浓度壳聚糖涂膜剂对芒果生化指标和保鲜效果的影响。结果表明:2%浓度的壳聚糖涂膜剂对芒果呼吸作用有最好的抑制效果,总酸度和酶活性变化最小,腐烂率最低,具有最好的保鲜效果。 相似文献
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本试验以 1 %壳聚糖作澄清剂 ,在每 5 0mL梨汁中分别添加 0、0 .1、0 .2、0 .3、0 .4、0 .5、0 .6和 0 .7mL ,研究壳聚糖不同添加量对梨汁的澄清效果。结果表明 ,壳聚糖添加剂量为梨汁的 0 .8%～ 1 .0 %时 ,室温下澄清 1h可使透光率达 92 %以上 ,且不影响梨汁的营养。说明壳聚糖可用作果汁的澄清剂。 相似文献
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壳聚糖对梨汁的澄清效果分析 总被引：5，自引：0，他引：5
本试验以1％壳聚糖作澄清莉，在每50mL梨汁中分别添加0、0．1、0．2、0．3、0．4、0．5、0．6和0．7mL，研究壳聚糖不同添加量对梨汁的澄清效果。结果表明，壳聚糖添加剂量为梨汁的0．8％～1．0％时，室温下澄清1h可使透光率达92％以上，且不影响梨汁的营养。说明壳聚糖可用作果汁的澄清剂。 相似文献
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复合果蔬汁澄清处理工艺的好坏直接影响其品质,添加澄清剂是常用的处理方法,壳聚糖作为常用的澄清剂,便宜且处理效果好又快。本文以壳聚糖为澄清剂,首先通过单因素实验,确定了四个单因素的最佳值：壳聚糖添加量0.08-0.12g/L,澄清温度40-50℃,澄清时间50-60min,复合果蔬汁pH值3.3-3.75,每个单因素各自处于最佳值时,复合果蔬汁的透光率和出汁率均在97%以上。在单因素实验基础上通过正交试验,确定了最佳工艺参数为：壳聚糖用量0.1g/L,澄清温度48℃,澄清时间55min,果蔬汁pH值3.5,在此条件下复合果蔬汁的透光率为98.8%。 相似文献
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以柑桔和胡萝卜为主要原料,分别进行酒精发酵、醋酸液体摇瓶发酵、下胶澄清等方法制成柑桔胡萝卜保健果醋.试验结果表明:酒精发酵的适宜条件为:活性干酵母接种量1‰,发酵温度32℃,发酵时间24h;醋酸发酵的适宜条件为:醋酸菌接种量10%,发酵温度33℃,发酵时间48h;果醋下胶澄清:采用1%壳聚糖的澄清效果最佳. 相似文献
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黄海丽 《唐山师范学院学报》2010,32(5):66-69
从唐山师范学院花房中采集菘蓝根腐病病根并对其进行了病原菌的分离、纯化和鉴定及不同浓度、不同分子量的壳聚糖对菘蓝根腐病病原菌的室内抑菌作用。结果表明：分离纯化得到致病菌经鉴定为半知菌亚门（Deuteromycotina）、丝孢纲（Hyphomycetes）,丛梗孢目（Stilbellales）、瘤座孢科（Tuborculadales）、镰刀属（Fusarium）真菌。在一定浓度范围内,分子量为3KD、50KD的壳聚糖随着浓度的提高,其抑菌效果也逐渐增强,6mg／ml的效果最好;分子量为150KD时,3mg／ml的效果最好;在一定分子量范围内,除0．75mg／ml的浓度外,随着壳聚糖分子量的提高,其抑菌效果也逐渐增强,分子量150KD的效果最好;本试验中,最大抑菌率为61％。 相似文献
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Pilar L. González-Torre Plácido Moreno 《European Journal of Engineering Education》2015,40(6):623-637
The Cider Game is a simulator for a supply chain-related learning environment. Its main feature is that it provides support to students in the constructivist discovery process when learning how to make logistics decisions, at the same time as noting the occurrence of the bullwhip phenomenon. This learning environment seeks a balance between direct instruction in the learning process on the part of the tutor, and a suitable and sufficient degree of freedom to regulate independent learning on the part of students. This article describes the basic learning mechanisms using the Cider Game and the graphical learning environments that it provides. We describe the functionality provided by this application, and analyse the effect over the rational understanding of the bullwhip phenomenon by the students and whether they are able to make decisions to minimise its impact, studying the differences when that decision-making learning is done individually or in groups. 相似文献
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以＂蒲城清洁能源化工有限责任公司渭北煤化工园区厂外供水净化工程＂项目中的＂HPS澄清池＂的结构形式优化为背景,采用有限元分析软件MIDAS/Gen分别建立原方案和优化后方案HPS澄清池的结构模型,结合澄清池特殊的工艺要求和其结构所受荷载情况,分析比较两种模型静力和动力特征,总结在静力、动力作用下结构的受力特性、应力和变形的分布规律,为该工程结构计算与设计提供依据。 相似文献
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Motivation,Intelligence, and Creative Behavior in Elementary School Children of Low-Creative Ability
Subjects were three groups of sixth-grade students relatively low in creative ability. It was predicted that a set of training sessions which included both instructions to respond creatively and verbal reinforcement for creative responding would be more effective in increasing creative responses than either simple practice or instructions to respond creatively without accompanying reinforcement. It was also predicted that more-intelligent subjects would benefit more than less-intelligent subjects from the experimental treatment which included reinforcement. Results confirmed the first hypothesis whether creative responding was operationalized in terms of number of responses, number of unique responses, or percentage of unique responses. The second hypothesis was not supported, but the main effect of intelligence was significant both for the number of unique responses and the percentage of unique responses, though not for the total number of responses. 相似文献
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Sludge blanket height (SBH) is an important parameter in the clarifier design, operation and control. Based on an overview
and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating a threshold concentration limit
into a relative concentration sharp change algorithm to eliminate the disturbance of compression interfaces on the correct
simulation of SBH. Pilot-scale test data are adopted to compare reliability of three SBH algorithms reported in literature
and the modified SBH algorithm developed in this paper. Calculated results demonstrate that the three SBH algorithms give
results with large deviation (> 50%) from measured SBH, especially under low solid flux conditions. The modified algorithm
is computationally efficient and reliable in matching the measured data. It is incorporated into a one-dimensional clarifier
model for stable simulation of pilot-scale experimental clarifier data and into dynamic simulation of a full-scale wastewater
treatment plant (WWTP) clarifier data.
Project supported by the National Natural Science Foundation of China (Grant No.501380107) 相似文献