黍米黄酒除浊方法的研究

通过考察4种澄清剂（壳聚糖、明胶、蛋清、PVPP）及3种助滤剂（水不溶玉米面、硅藻土、皂土）对黍米黄酒的除浊效果和助滤效果,选择了壳聚糖为澄清剂,水不溶玉米面为助滤剂。在此基础上,考察了二者的用量、静置时间等条件对除浊效果的影响,建立了黍米黄酒除浊方法,其壳聚糖用量为0.005 g/L,水不溶玉米面用量为20 g/L,静置时间为1 h,常温条件下过滤。试验结果表明,处理后的黍米黄酒经冷热交替强化试验或放置1年其透光率均＞99%,同时其总糖、非糖固形物、总酸、氨基酸态氮含量及感官指标均符合GB/T 13662-2008规定。     

DHG澄清剂在黄酒除浊中的应用

为预防黄酒非生物浑浊,利用DHG澄清剂在黄酒中除浊,用量为300 mg/kg.通过将澄清剂用软水溶解（1：10）,加入酒中并搅拌均匀,冷冻静置24 h后,经过滤、灭菌和灌装,可降低黄酒中的总氮和固形物含量,提高黄酒对蛋白质的稳定性,以及改善黄酒的感官质量。     

瓶装黄酒简易除浊法的研究

针对瓶装黄酒产生混浊、沉淀的老问题,分别选用了明胶、单宁、101澄清剂、EDTA二钠等进行除浊试验;并改进过滤设备、过滤介质和条件,提高了瓶装黄酒的稳定性。(汉冯李)     

营养保健酒的除浊方法初探

营养保健酒的除浊方法初探冯树忠河北承德乾隆醉酒厂（０６７４００）营养保健酒内含营养成分复杂，易产生混浊。为解决保健酒混浊问题，使用了４种不同的澄清剂进行澄清试验，澄清剂为明胶、琼脂，丹宁加明胶，ＪＡ澄清剂。试验结果表明，使用ＪＡ高效澄清剂，澄清时间８...     

植酸优化黄酒生产工艺的研究

该文试验了植酸对黄酒糖化发酵菌种的影响及在除浊工艺上的应用。结果表明,植酸能促进菌种生长发酵,增加发酵产物,缩短发酵周期;植酸能改善黄酒质量,提高出酒率及原料利用率;植酸用于除浊的最佳浓度为0.04%,处理时间为24h,酒液清亮透明,黄酒的风味和感官均得到改善。     

对白酒降固除浊的探讨--科学利用植酸降固、活性炭除浊

科学利用植酸降固，专用活性炭除浊技术，使之在处理酒体，提高产品质量上找到一个最佳点。既不破坏，又不影响酒质，达到完美的处理目的。     

植酸用于低度白酒除浊的研究

本文分析了高级脂肪酸乙酯引起白酒混浊的原因，试验用植酸作澄清剂，解决白酒混浊问题。试验表明，在混浊失光的低度白酒中，添加０．０３％的植酸，搅拌后静置２４ｈ过滤，即可获得澄清透明的酒体；而且对酒的香味物质含量，总酸，总酯等均无影响，另外，试验酒在－１６℃下冷冻２ｈ，酒液仍保持澄清透明，说明植酸是一种较为理想的白酒澄清剂。     

配制酒除浊方法的研究

配制酒是以蒸馏酒或酿造酒、食用酒精为酒基,采用外加呈色、呈香、呈味物质生产的白酒.因配制酒中各溶解成分的溶解度条件的改变而易产生混浊,混浊的原因有:蛋白质混浊、棕黑色沉淀、无机盐沉淀、碱性混浊和高级脂肪酸酯混浊;除浊法有澄清剂法、超滤法和冷冻法,冷冻法除浊对配制酒的口感质量与除浊效果比其他两种方法好.基酒降度的方法、酒度的高低、冷冻时间、母液冷冻温度和贮存条件的选择对配制酒的除浊效果均有影响.(孙悟)     

对植酸在白酒中除浊脱锈和改善口感的研究

前言试验表明,在混浊失光的低度白酒中,或带黄色的白酒中（指染锈的酒）添加适量的植酸,静置过滤后即可得到澄清透明的酒液,而且对酒的香味物质含量、总酸、总酯等均无影响。酒液经低温冷冻处理,也不复混,说明植酸是一种白酒除混浊较为理想的澄清剂。长期以来困扰低...     

阳离子表面活性剂糖浆脱色除浊

用阳离子表面活性剂Arquad 2HT-75分别与两种澄清剂组合对复筛原糖浆进行气浮清净试验,结果显示,2HT-75与P2O5的组合最优.在实验条件下,2HT-25添加量500×10-6,糖浆除色率可达70%以上,除浊率高于94%.     

氯化盐处理对绿豆芽菜植酸降解的影响

为降低绿豆芽菜中抗营养物质植酸含量,探究氯化盐对绿豆芽菜植酸降解的影响,研究了KCl、NaCl和CaCl2处理下绿豆芽菜的长势、植酸酶活性及植酸含量的变化,筛选了具有降植酸效果的氯化盐并优化了浓度组合。结果发现,NaCl和CaCl2能够促进植酸降解同时促进绿豆芽菜生长;单因素试验结果表明,1.6 mmol/L NaCl和6 mmol/L CaCl2降植酸效果最佳,且NaCl和CaCl2促进植酸降解作用有叠加效应。响应面法优化得到NaCl、CaCl2浓度分别为1.68 mmol/L和6.40 mmol/L时,植酸含量降低至8.04 μg/株,为对照的10.84%。     

The effects of phytic acid on the Maillard reaction and the formation of acrylamide

Phytic acid, myo-inositol hexaphosphoric acid, exists in substantial (1–5%) amounts in edible plant seeds. In this study the effects of phytic acid on the Maillard reaction and the formation of acrylamide were investigated. Both phytic acid and phosphate enhanced browning in glucose/β-alanine system, but phytic acid was less effective than phosphate. Higher pH favoured the catalytic activities for both of them. The influence of the types of sugar and amino acid on the reaction was also examined. Browning was suppressed by the addition of calcium and magnesium ions, but an additive effect was observed for ferrous ions and phytic acid in glucose/β-alanine solution at pH 8.0. Both phytic acid and phosphate promoted the polymerisation of the reaction intermediates. The kinetics of Maillard reaction was first-ordered reaction in the presence of phytic acid. Phytic acid was less effective than phosphate in the formation of acrylamide. When potato slices were treated with sodium phytate and calcium chloride successively, the formation of acrylamide was greatly suppressed.     

Effect of Soda Leavening on Phytic Acid Content and Physical Characteristics of Middle Eastern Breads

The effect of soda (sodium bicarbonate) as a leavening agent on pH, phytic acid hydrolysis and physical quality of a fermentation model system and two popular Middle Eastern breads, Iranian taftoon and Pakistani naan (Arabic) were studied. Supplementing 0.2 and 0.4% soda invariably decreased phytic acid hydrolysis. In sour starter supplemented dough, phytic acid was reduced by 82% after 3 hr. However, when 0.4% soda and sour starter were added loss of phytic acid did not exceed 29%. Supplementing soda in taftoon and naan bread formula significantly lowered phytic acid hydrolysis during fermentation. Soda had no apparent improvement on physical quality of breads but increased the dough water absorption and lengthened the mixing time.     

不同浓度植酸处理对油桃保鲜效果的影响

将油桃分别浸入浓度为0．05％、0．10％、0．15％的植酸溶液中30s,晾干装袋后置于室温下贮藏,定期测定油桃的理化指标,研究不同浓度植酸溶液涂膜处理对油桃的保鲜效果。结果表明,植酸用于油桃保鲜,可以延缓VC降解、降低糖酸损失、减少失重、防止腐烂、保持硬度、抑制呼吸、延长油桃的贮藏期,其中浓度为0．10％的植酸溶液涂膜处理保鲜效果较明显。     

植酸对番茄保鲜效果的影响

以变色期番茄为材料,分别采用浓度为0.05%、0.10%、0.15%的植酸溶液浸泡30s,在室温下贮藏33d,研究不同浓度植酸溶液涂膜处理对番茄果实的保鲜效果。结果表明,植酸溶液处理能推迟番茄果实呼吸跃变时呼吸高峰的出现时间,降低呼吸强度峰值;对保持果实硬度、可溶性固形物、维生素C、可滴定酸有较好作用;能减少水分蒸发,降低果实失重率;其中浓度为0.10%的植酸溶液对番茄果实进行涂膜处理保鲜效果最好。     

Irradiation Effects on Free Radical Scavenging and Antioxidant Activity of Phytic Acid

ABSTRACT: Free radical scavenging and antioxidant activities of irradiated phytic acid at various concentrations were studied. Phytic acid sodium salt dissolved in deionized distilled water was irradiated at 0, 5, 10, 15, and 20 kGy. The degradation of phytic acid by irradiation was observed, and it was found that the concentrations had an effect on the degree of degradation. Stable 2,2-diphenyl-1-picrylhydrazyl radical scavenging ability of phytic acid was significantly increased by irradiation ( P < 0.05) and was positively correlated with irradiation dose ( P < 0.01). Antioxidant activity of phytic acid in lipid model systems was slightly increased by irradiation; however, at higher concentrations, the activity was reduced or was the same compared with nonirradiated phytic acid.     

1-MCP 与植酸处理对草莓果实采后生理品质的影响

采用1-甲基环丙烯(1-MCP)和植酸对草莓进行不同处理,通过追踪测定其贮藏期间的质量损失率、硬度、可溶性固形物(soluble solids content,SSC)、呼吸强度、维生素C(VC)、可滴定酸(titratable acidity,TA)和相对电导率等指标来研究不同处理对草莓的保鲜效果。结果表明：1-MCP和植酸处理可有效降低草莓的质量损失率和呼吸强度,推迟SSC出现峰值的时间,延缓其后熟衰老过程,抑制其硬度、TA和VC含量的下降;同时,1-MCP 和植酸复合处理比两者各自的单独处理都具有更好的效果,能显著改善草莓在贮藏期间的果实品质。     

植酸对烟叶破碎后几个生理指标的影响

研究了烟叶破碎后其生理指标在自然条件下的变化情况,比较了不同浓度的肌醇六磷酸(植酸)对破碎后细胞抽取液生理指标的差异.结果发现,自然条件下烟叶破碎后,pH值、丙二醛、色素都是逐步变大的,多酚氧化酶的活性正好相反.破碎过程中加入不同浓度的植酸后,经0.2%的植酸处理,各项生理指标表现较好,表明0.2%的植酸处理能有效地降低细胞破碎后多酚的褐变,有利于对烟叶有益物质的提取,使烟叶得到最大程度的综合利用.     

Effect of Germination on Phytic Acid, Protein and Fat Content of Rapeseed

Rapeseed was germinated over a 7-day period and the changes in phytic acid, protein and fat contents were monitored. Two-day germination period reduced the phytic acid by 13% and slightly increased the fat and protein by 6 and 4%, respectively. A 65% decrease in phytic acid, 10% increase in protein and 46% decrease in fat were observed after 7 days of germination. The free fatty acid values increased from 1 to 120. While reduction in phytic acid and increase in protein are desirable, the reduction in fat and its increased hydrolysis to free fatty acids after 7 days may be considered detrimental if rapeseed oil is to be extracted for commercial purposes.