共查询到19条相似文献,搜索用时 93 毫秒
1.
2.
3.
《中国食品添加剂》2019,(8):97-102
目的:本试验对膳食纤维面包中红薯渣膳食纤维的添加对面包的比容、保水性、质构以及面包烘焙品质的影响进行了研究。方法:将提取的红薯渣膳食纤维添加到面包中,制成膳食纤维面包。利用称重法测定面包的比容和保水性;利用质构仪测定面包的质构特性,面包烘焙品质评分标准参照GB/T 14611-2008。结果:红薯渣膳食纤维的添加,对面包的弹性以及内聚性无显著变化。随着红薯渣膳食纤维添加量的逐渐增大,硬度、咀嚼性增大,比容呈逐渐下降的趋势。由于膳食纤维的保水性能,在一定时间内可使面包的失水能力降低,提高其持水性,较好的保持了面包的口感,延长面包的货架期。当红薯渣膳食纤维添加量为6%时,面包的体积外观、芯色泽、芯质地和芯纹理结构等综合品质达到了最佳状态。结论:红薯渣膳食纤维的添加降低了面包的比容,提高了保水性、硬度和咀嚼性,面包烘焙品质总体达到最佳状态。 相似文献
4.
5.
7.
介绍了红薯膳食纤维的脱色工艺,研究了双氧水浓度、脱色时间、脱色温度及pH值对红薯膳食纤维脱色效果的影响,通过正交试验优化了红薯膳食纤维的脱色工艺.结果表明,其最佳工艺条件为双氧水浓度7%,pH值11.0,脱色温度为40 ℃,脱色时间2.5 h,此条件下脱色后红薯膳食纤维的白度为59.20. 相似文献
8.
9.
10.
11.
甘薯茎尖中不溶性膳食纤维的提取工艺研究 总被引:2,自引:0,他引:2
通过碱结合木瓜蛋白酶水解法分别提取2种甘薯茎尖的不溶性膳食纤维(IDF),探讨提取的工艺条件,并对膳食纤维的性能进行研究.结果表明,甘薯茎尖中IDF的最佳提取条件为NaOH浓度5%,碱浸温度75℃,碱浸时间70min,木瓜蛋白酶用量0.6%.成品气味较淡,IDF干基含量分别为70.17%和53.27%,膨胀力为8.11mL/g和6.78mL/g,持水力为6.20g/g和5.18g/g. 相似文献
12.
13.
Microbial hydrogen production from sweet potato starch residue 总被引:15,自引:0,他引:15
Yokoi H Saitsu A Uchida H Hirose J Hayashi S Takasaki Y 《Journal of Bioscience and Bioengineering》2001,91(1):58-63
Clostridium butyricum could produce hydrogen from a sweet potato starch residue upon supplementation of nitrogen sources. A repeated batch culture using a mixed culture of C. butyricum and Enterobacter aerogenes produced hydrogen with a yield of 2.4 mol H2/mol glucose under a controlled culture pH of 5.25 in a medium consisting of the sweet potato starch residue and 0.1% Polypepton without addition of any reducing agents. Rhodobacter sp. M-19 produced hydrogen from the supernatant of the culture broth obtained in the repeated batch culture containing C. butyricum and E. aerogenes when 50 microg/l Na2MoO4.2H2O and 20 mg/l EDTA were added to the supernatant and it was cultured under a controlled culture pH of 7.5. A high yield of hydrogen of 7.0 mol H2/mol glucose from the starch remaining in the starch residue was attained in two-step repeated batch cultures containing C. butyricum and E. aerogenes, and by Rhodobacter sp. M-19. 相似文献
14.
15.
16.
17.
黄酮类化合物广泛存在于植物界,是许多中草药的有效成分。在自然界中最常见的是黄酮和黄酮醇,此外,还有双氢黄醇、异黄酮、双黄酮、黄烷醇、查尔酮、橙酮及花色苷等。由于类黄酮具有很强的抗氧化和消除自由基的作用,备受国内外研究者的青睐,成为研究的热点。黄酮类化合物有着重要的医用价值,主要体现在:抗炎症、抗过敏;抑制细菌、抑制病毒;防治肝病、防治血管疾病;抗肿瘤、抗化学毒物等。本文从节约资源、提高黄酮得率、实验操作性强等方面分析,选取紫薯茎叶为实验材料,并结合国内外大量研究理论成果,论述了黄酮类化合物的提取方法,将这些方法的优缺点进行了总结,同时,详细的阐述了黄酮类化合物的功能性研究进展,希望对黄酮的研究者起到借鉴、提供参考的价值。 相似文献
18.
Tianlin Wang Xinhong Liang Junjian Ran Junliang Sun Zhonggao Jiao Haizhen Mo 《International Journal of Food Science & Technology》2017,52(3):741-747
To make better use of sweet potato residue (SPR), a new pretreatment method, steam explosion (SE), can increase its content of soluble dietary fibre (SDF). Response surface methodology (RSM) was used to determine the SE variables for optimum SDF yield. The optimal conditions were a steam pressure of 0.35 MPa, a residence time of 121 s and a sieving mesh size 60. Under the optimised conditions, the content of SDF from SPR reached 22.59 ± 0.35%, an increase of 18.78% compared with that (3.81 ± 0.62%) from untreated SPR. The water‐holding capacity, oil‐holding capacity (OHC) and swelling capacity of SDF were improved by SE. Scanning electron micrograph (SEM) images demonstrated that SDF had become poriferous, loose and dilatants after SE treatment. This technology provides an efficient process for increasing the industrial production of SDF from SPR. 相似文献
19.
研究超声波辅助酶法提取紫薯不溶性膳食纤维(IDF)的工艺,并对其体外抗氧化性进行评定。考察料液比、超声时间、超声功率、α-淀粉酶用量和酶解温度5个因素对紫薯IDF提取率的影响,在单因素试验的基础上进行正交优化试验,以羟自由基(·OH)体外清除率评价IDF的抗氧化水平。结果表明,紫薯IDF的最佳工艺参数为料液比115(g/mL)、超声时间40 min、超声功率160 W和酶解温度75℃,该条件下IDF的提取率可高达38.32%。体外抗氧化结果显示紫薯IDF对·OH具有良好的清除效果,并且呈现出一定的量效关系。经计算,其IC_(50)值为39.27 mg/mL,抗氧化性强于VC。 相似文献