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酶法水解麦胚制取持水剂的研究 总被引:1,自引:0,他引:1
采用响应面分析方法研究了酶法水解麦胚制取持水剂的生产工艺,并对产品应用于香肠中的抗氧化效果进行了试验。试验结果表明:酶法水解麦胚制取持水剂的优化工艺参数为:对10%的麦胚乳400ml,反应温度为44.4℃,反应时间为4h,酶与底物浓度比为860μ/g。经优化工艺生产的持水剂的水分活度为0.896,所对应的水解度为26.5%。应用于香肠可显著提高其货架寿命。 相似文献
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廊坊百冠包装机械有限公司(原廊坊包装设备制造总公司)作为专业的饮料机械制造企业,拥有近30年的设计经验,掌握了液体灌装等多项核心专利技术,成功开发了一系列中、大型灌装机组,并已经具备了产业化条件,在行业中处于领先地位。 相似文献
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网印折光装饰技术的出现,给我国网印包装行业带来了机会,论述了生产高质量网印折光包装品必须具备的三个条件;制作高质量的网印版;创造2高洁净的印刷环境;培养高素质的操作人员和添加高精度的印刷设备,着重介绍了制作高质量网印版的各工序。 相似文献
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This study compared genetic evaluations from 3 test-day (TD) models with different assumptions about the environmental covariance structure for TD records and genetic evaluations from 305-d lactation records for dairy cows. Estimates of genetic values of 12,071 first-lactation Holstein cows were obtained with the 3 TD models using 106,472 TD records. The compound symmetry (CS) model was a simple test-day repeatability animal model with compound symmetry covariance structure for TD environmental effects. The ARs and ARe models also used TD records but with a first-order autoregressive covariance structure among short-term environmental effects or residuals, respectively. Estimates of genetic values with the TD models were also compared with those from a model using 305-d lactation records. Animals were genetically evaluated for milk, fat, and protein yields, and somatic cell score (SCS). The largest average estimates of accuracy of predicted breeding values were obtained with the ARs model and the smallest were with the 305-d model. The 305-d model resulted in smaller estimates of correlations between average predicted breeding values of the parents and lactation records of their daughters for milk and protein yields and SCS than did the CS and ARe models. Predicted breeding values with the 3 TD models were highly correlated (0.98 to 1.00). Predicted breeding values with 305-d lactation records were moderately correlated with those with TD models (0.71 to 0.87 for sires and 0.80 to 0.87 for cows). More genetic improvement can be achieved by using TD models to select for animals for higher milk, fat, and protein yields, and lower SCS than by using models with 305-d lactation records. 相似文献
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《Food research international (Ottawa, Ont.)》2006,39(4):458-466
In this study, transglutaminase was used to produce cross-linked casein, gelatin and casein–gelatin blend (100:0, 75:25, 50:50, 25:75 and 0:100) edible films. Cross-linking was investigated by SDS–PAGE. Mechanical and water vapor barrier properties of the films were characterized using ASTM procedures, and the film morphology was evaluated using scanning electron microscopy. The casein–gelatin film showed significant greater elongation values (P < 0.05) with or without transglutaminase treatment, as compared to films made from gelatin or casein alone. Mixtures of casein and gelatin produced a synergistic effect only observed in the film elongation, while no improvement was detected for tensile strength and water vapor barrier properties, except for the casein:gelatin (75:25) formulation with transglutaminase, which showed the lowest water vapor permeability value (5.06 ± 0.31 g mm/m2 d kPa). Enzymatic cross-linking also induced a substantial increase in the high molecular weight protein components in the film forming solutions. 相似文献
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张铁岭 《北京印刷学院学报》1999,(1)
运用应力—强度相干理论,推导出强度为Weibul分布,应力为其他分布时可靠度求解表达式,并应用专用数学软件Mathematica实现了数值的求解。文中给出若干求解实例,求解的过程简便、直观,有利于工程可靠性设计与分析借鉴 相似文献
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Purpose
To report the symptoms and experiences associated with habitual hydrogel (Hyd) and silicone hydrogel (SiHy) contact lenses (CLs) among young adults and measure their association with age.Methods
Questionnaire responses from 699 Hyd and 183 SiHy wearers were analyzed to test the association of age with features indicating struggle with CL wear. Prevalence by age was compared between groups with Pearson's chi-square and within groups with Spearman's correlation coefficient.Results
Hyd and SiHy groups were similar for sex and age distribution. Diagnosis of dry eye increased with age in the Hyd wearers from 10.6% to 21.1% (18-24 vs. 30-35 years), but was approximately 19% in the SiHy wearers across age. Adverse environments caused more discomfort with Hyd than SiHy lenses and Hyd wearers’ discomfort increased with age (smoky (p = 0.0001), dry air environments (p = 0.002), after napping or sleeping (p = 0.004). More Hyd wearers considered discontinuation of CL wear with age, from 4.6% to 14.2% (18-24 vs. 30-35 years, p < 0.04), but the proportion remained steady at 9% across age for SiHy wearers (p = 0.46).Conclusions
From 18 to 35 years, hydrogel CL wearers reported increasing struggle with CL wear and more negative ratings compared to SiHy wearers. Older hydrogel CL wearers were also more likely to consider discontinuing CL wear compared with younger hydrogel or silicone hydrogel CL wearers in general. Young adult CL wearers should be routinely queried directly about specific aspects of CL wear in order to determine whether different lens types should be prescribed to avoid abandonment of CL wear. 相似文献13.
<正> 时下,国内举办形形色色的冰淇淋展、巧克力展,如过江之鲫,竞争激烈。如何避免同质化,办出自己的特色,更好地为业内企业服务,成为诸多主办单位亟待解决的首选课题。 刚刚在上海闭幕的2003第二届冰淇淋、糖果、巧克力展的成功案例,对展览届人士不无启发。 花开并蒂冰淇淋与巧克力结合 相似文献
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<正> 由中国焙烤食品糖制品工业协会、德国中央焙烤协会共同主办的2004第七届中国国际焙烤展览会已于5月28~30日在上海光大会展中心圆满结束。用火暴二字,形容本届会展再恰当不过了。20多个国家的展商云集,东西展厅连成一片,是主办方精心服务感动了“上帝”,还是来自中外从业人士钟情正日益走俏的中国焙烤市场呢? 相似文献
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本文讨论了猪皮制革的现状,分析其成因,在此基础上阐明了猪皮制革必须适应市场经济的观点,并提出了猪皮制革走出低谷的若干具体对策。 相似文献
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Pork treatments were restructured with: (1) 1.15 g/100 g Activa™ TG-RM (TG); (2) 10 g/100 g Fibrimex™ (control-10); (3) 5 g/100 g Fibrimex™(control-5); (4) 5 g/100 g Fibrimex™ plus 0.3 g/100 g sodium tripolyphosphate (STP). Color, proximate analysis, texture profile analysis, cook yield, dimensional change, and bind strength of raw and cooked treatments were evaluated. TG had the strongest raw and cooked bind (P?0.05). Hardness and gumminess were similar for all treatments (P>0.05); however, TG resulted in the most cohesiveness (P?0.05). Consumer analysis was performed on treatments 1, 2 and 4. Consumers rated TG higher for flavor and overall acceptability (P?0.05) with no differences among treatments for texture (P>0.05). Restructured pork steaks formulated with the combination of STP and 5 g/100 g Fibrimex™ were rated similar to 10 g/100 g Fibrimex™ in texture and flavor indicating that steaks formulated with the STP treatment are acceptable to consumers as well as being economically viable. 相似文献