可溶性糯米淀粉的制备及成膜性质研究     

鲍士宝  宫阿敏  吴慧  龚晓弦  陈守江 《安徽科技学院学报》2012,(3):49-52

研究了以糯米粉为原料,通过糊化处理制备可溶性糯米淀粉,结果表明当糊化工艺为:pH10.0、糊化温度85℃、糊化时间30min时,制备的可溶性糯米淀粉得率较高,且其溶液粘度较好。以可溶性糯米淀粉为成膜基质制备了可食用淀粉膜,与传统明胶膜相比,其拉伸强度较低,但色泽、透明度良好。  相似文献   

氧化淀粉研究进展     

吕旷  孔妮  邓艳  柳春  罗想平  倪海明  郭佳文  陈专  蓝丽 《大众科技》2015,17(4)

淀粉在自然界的含量仅次于纤维素和矿物填料,作为无污染型、可再生的天然植物资源,其特殊的化学结构使得应用受限,改性后的产品性能更能满足人们的需求。文章主要综述氧化淀粉的研究进展。  相似文献   

Cloning and characterization of a glucose 6-phosphate/phosphate translocator from Oryza sativa     

姜华武  佃蔚敏  刘非燕  吴平 《浙江大学学报(A卷英文版)》2003,4(3)

Plastids of nongreen tissues import carbon as a source of biosynthetic pathways and energy, and glucose 6-phosphate is the preferred hexose phosphate taken up by nongreen plastids. A cDNA clone encoding glucose 6-phosphate/phosphate translocator (GPT) was isolated from a cDNA library of immature seeds of rice and named as OsGPT. The cDNA has one uninterrupted open reading frame encoding a 42 kDa polypeptide possessing transit peptide consisting of 70 amino acid residues. The OsGPT gene maps on chromosome 8 of rice and is linked to the quantitative trait locus for 1000-grain weight. The expression of OsGPT is mainly restricted to heterotrophic tissues. These results suggest that glucose 6-phosphate imported via GPT can be used for starch biosynthesis in rice nongreen plastids.  相似文献   

高温α-淀粉酶对玉米、豆粕、玉米秸秆及黄豆秸秆中性洗涤纤维的影响     

袁胜  王正  宣晶晶  王立克  任清长 《安徽科技学院学报》2017,31(1)

目的:研究高温α-淀粉酶处理浓度和时间对中性洗涤纤维(NDF)的影响,为准确测定NDF提供参考。方法:利用玉米、豆粕、玉米秸秆和黄豆秸秆为原料,开展5批试验,每批5个处理,每个处理3个重复。在每批试验中,分别用0、0.5、1.0、1.5和2.0 g/L高温α-淀粉酶对其在75℃处理24 h,研究高温α-淀粉酶的浓度对淀粉消失率和NDF测定结果的影响;用2.0 g/L高温α-淀粉酶在75℃对饲料原料分别处理0、12、24、36和48 h,研究高温α-淀粉酶的处理时间对淀粉消失率和NDF测定结果的影响。结果:随着高温α-淀粉酶的浓度升高,玉米、玉米秸秆和黄豆秸秆的淀粉消失率分别线性提高(P0.05),但对豆粕的淀粉消失率影响较小(P=0.401)。玉米和豆粕的NDF测定结果分别线性降低(P0.05),但对玉米秸秆(P=0.300)和黄豆秸秆(P=0.144)的NDF测定结果影响较小。随着高温α-淀粉酶处理时间的增加,玉米、豆粕、玉米秸秆和黄豆秸秆的淀粉消失率分别线性提高(P0.05)。与对照组相比,玉米、豆粕、玉米秸秆和黄豆秸秆的NDF分别线性降低(P0.05)。结论:添加高温α-淀粉酶能够有效降低饲料原料中淀粉含量,淀粉酶添加量越大或处理时间越长,对淀粉含量降低效果越明显,饲料原料的NDF测定结果就越准确。在本试验中,用于测定饲料原料的适宜α-淀粉酶的浓度与时间分别为2.0 g/L与24 h。  相似文献   

Molecular cloning,characterization and expression analysis of three key starch synthesis-related genes from the bulb of a rare lily germplasm,Lilium brownii var. giganteum     

Wu  Yun  Sun  Minyi  Li  Shiqi  Min  Ruihan  Gao  Cong  Lyu  Qundan  Ren  Ziming  Xia  Yiping 《Journal of Zhejiang University. Science. B》2021,22(6):476-491

  相似文献   

淀粉生物降解塑料的应用与发展     

邵水源  尚文静 《技术与创新管理》2011,32(1):79-82

塑料应用引发的环境污染是困扰世界的难题,使用降塑料是解决这一问题的有效途径。淀粉是一种可再生、能降解的低廉原料,以淀粉为基础原料制备的可生物降解淀粉塑料是人们的共同期望。文章从淀粉塑料的发展历程、分解机理、分类等方面阐述了其降解塑料的发展趋势及应用前景。  相似文献   

淀粉-聚乙烯醇生物降解薄膜的制备研究     

张启忠  陈佐钧  孙元波 《环球赛鸽科技》2014,(35)

本文以淀粉为和聚乙烯醇(PVA)原料,采用交联共混反应制备淀粉-PVA生物降解薄膜。考察了淀粉-PVA薄膜制备过程中诸因素对薄膜各项性能和生物降解性的影响。结果表明,淀粉-PVA薄膜各项性能优良,具有生物降解性。  相似文献   

Application of near-infrared spectroscopy to predict sweetpotato starch thermal properties and noodle quality   总被引：2，自引：0，他引：2  

Lu GQ  Huang HH  Zhang DP 《Journal of Zhejiang University. Science. B》2006,7(6):475-481

Sweetpotato starch thermal properties and its noodle quality were analyzed using a rapid predictive method based on near-infrared spectroscopy （NIRS）. This method was established based on a total of 93 sweetpotato genotypes with diverse genetic background. Starch samples were scanned by NIRS and analyzed for quality properties by reference methods. Results of statistical modelling indicated that NIRS was reasonably accurate in predicting gelatinization onset temperature （To） （standard error of prediction SEP=2.014 ℃, coefficient of determination RSQ=0.85）, gelatinization peak temperature （Tp） （SEP=-1.371 ℃, RSQ=0.89）, gelatinization temperature range （Tr） （SEP=2.234 ℃, RSQ=0.86）, and cooling resistance （CR） （SEP=0.528, RSQ=0.89）. Gelatinization completion temperature （To）, enthalpy of gelatinization （△H）, cooling loss （CL） and swelling degree （SWD）, were modelled less well with RSQ between 0.63 and 0.84. The present results suggested that the NIRS based method was sufficiently accurate and practical for routine analysis of sweetpotato starch and its noodle quality.  相似文献