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高压脉冲电场对酿酒酵母发酵能力的影响
高压脉冲电场 酿酒酵母 活性 发酵
2020/3/20
为探究高压脉冲电场(PEF)在酒精发酵工业上的实际应用,本研究以酿酒酵母为试验材料,在设定脉宽、频率、作用时间等参数不变的条件下,以电场强度为唯一变量,分别采用电场强度为1、6 kV·cm-1的PEF对酵母进行预处理。通过检测发酵底液中酵母生长量、葡萄糖消耗量和乙醇产出量的变化,探究PEF对酿酒酵母发酵能力的影响。结果表明,经12 h发酵后,在电场强度为1 kV·cm-1的PEF刺激作用下,酿酒酵...
壳聚糖对煎烤鱿鱼品质及甲醛生成的影响
巨型枪乌贼 壳聚糖 甲醛 营养成分
2019/1/22
为减少煎烤鱿鱼在制作过程中的营养损失和甲醛的生成。实验采用2 g/L的壳聚糖溶液(普通壳聚糖和羧甲基壳聚糖)浸泡处理新鲜巨型枪乌贼(秘鲁鱿鱼)5 min,再进行高温煎烤。甲醛检测的结果显示,煎烤后对照组(纯水浸泡)、壳聚糖组、羧甲基壳聚糖组鱿鱼中的甲醛含量分别为45.56、4.79、8.30 mg/kg,各组之间差异极显著。煎烤前后鱿鱼中几种营养素的检测结果显示,壳聚糖组中天冬氨酸、丝氨酸、脯氨酸...
针对豆腐干软罐头恒温热杀菌工艺中存在的因杀菌过度而品质不佳问题,开展了杀菌工艺优化。首先利用CFD软件数值模拟杀菌过程获取节点温度历史,筛选出杀菌值>3 min且蒸煮值能够有效减小的梯度升温方法,再利用试验对该方法进行验证,通过比较实际杀菌过程的杀菌值、蒸煮值及具体品质指标,同时,结合工业生产的需要,最终确定一种升温模式作为优化杀菌工艺。研究最终得到一种即能满足安全指标且品质劣化程度显著降低的豆腐...
葡萄果实与葡萄酒的颜色由其所含花色苷的种类和含量决定,而花色苷是由花色素经过糖基化修饰转变而成,所以糖基化修饰在葡萄果实花色苷合成途径中起着重要作用。葡萄果实中的糖基化花色苷主要包括花色素的3–O–葡萄糖基和3,5–O–双葡萄糖基,即花色素单糖苷和花色素双糖苷,糖基化花色苷的组成是决定红葡萄酒品质的关键因素之一。对糖基化花色苷在葡萄果实中的组成及其对葡萄酒颜色和稳定性的影响进行了简要介绍,重点对花...
华东理工大学生物工程学院食品科学与工程系
华东理工大学生物工程学院 食品科学与工程系
2022/8/5
D-氨基酸诱导的酿酒酵母细胞内活性氧的累积
D-氨基酸 酿酒酵母 活性氧 过氧化氢
2019/4/18
D-氨基酸在食品中广泛存在。研究D-氨基酸诱导的酿酒酵母细胞内的活性氧的累积及其生物损伤。实验结果显示D-氨基酸抑制细胞生长,引起细胞内H2O2含量的升高,导致细胞内过氧化氢酶和过氧化物酶的活性增强。该结果表明H2O2是D-氨基酸诱导产生的活性氧的主要类型,氧化损伤是D-氨基酸对酿酒细胞毒性的主要机制。
了解水蒸气蒸馏与共水蒸馏两种不同提取工艺以及不同收集时段对‘大马士革’玫瑰花水香气成分的影响,为玫瑰花水的合理加工及利用提供参考。【方法】通过固相微萃取取样,气相色谱-质谱联用技术(GC-MS)分析,对各成分质谱通过计算机谱库(NIST/WILEY)检索和资料分析,然后结合文献进行人工谱图解析,对不同提取工艺以及不同收集时段的‘大马士革’玫瑰花水主要香气成分进行鉴定和定量。【结果】利用水蒸气蒸馏工...
JECFA标准 INS No. 160a(i) Beta-胡萝卜素(合成)。
JECFA标准 INS No. 160a(ii) 胡萝卜素(植物)。
Agricultural practices, biology and quality of eggplant cultivated in Central Europe. A review
farming management fruit quality Solanum melongena L. temperate climate
2018/3/6
The eggplant is a warm-climate crop of high economic importance. In many Asian and Mediterranean countries, eggplants
are essential components of everyday dishes, while in Central Europe they have be...
Effect of acid whey and freeze-dried cranberries on lipid oxidation and fatty acid composition of nitrite-/nitrate-free fermented sausage made from deer meat
Fermented Sausage Freeze-dried Cranberries Lipid Oxidation Fatty Acid Profile
2017/3/7
This study evaluated the effect of acid whey and freeze-dried cranberries on the physicochemical characteristics, lipid oxidation and fatty acid composition of nitrite-free fermented sausage made from...
Isomers of c18:1 and c18:2 Acids in Fresh and Stored Fermented Milks Produced with Selected Starter Cultures
trans fatty acids milk drinks storage time
2016/12/9
The effect of the applied starter cultures and storage time of fermented milk drinks on the content of cis-9, trans-11 octadecadienoic acid (CLA), as well as trans isomers of C18:1 and C18:2 acids wer...
Heavy Metals in the Common Carp (Cyprinus carpio L.) from Three Reservoirs in the Czech Republic
atomic absorption spectrometry cadmium fish lead mercury
2016/12/9
Toxic metals (cadmium, lead, and mercury) in the tissues of common carp fished from three reservoirs (Pilská, Domaninsky, and Matějovsky) in the Bohemian-Moravian Highlands were measured in the period...
Wines with Increased Lignan Content by the Addition of Lignan Extracts
enrichment of white and red wines 7-hydroxymatairesinol alpha-conidendrin antioxidant activity total polyphenol content sensory evaluation
2016/12/9
Red and white wines [Grüner Veltliner white wine and Blue Limberger (Blaufränkisch) red wine (vintage 2013)] were enriched with lignan hydroxymatairesinol originated from spruce knots. These spru...
Use of an Exogenous Carboxypeptidase to Accelerate Proteolysis in Reggianito Cheese
Reggianito cheese proteolysis ripening exogenous enzymes
2016/12/9
The effect of an exogenous commercial carboxypeptidase on the proteolysis of Reggianito cheese was evaluated. Cheeses were manufactured using 4 concentrations of enzyme: 0, 5, 10, and 20 g/100 l milk....