低糖果味胡萝卜脯加工工艺的研究     

翟颖丝  李淑婷  谢慧明 《农产品加工．学刊》2009,(4)

以新鲜胡萝卜为原料,制作低糖果味胡萝卜果脯。在传统生产工艺中增加了缓冻预处理工序,果脯加工工艺的优化结果为:在-18℃下冻结6h,不仅能较好地促进渗糖,而且口感较佳;渗糖液添加组分为:25%的蔗糖,25%的淀粉糖浆,0.4%的柠檬酸,1.2%的鲜橘皮和0.4%的明胶;采用60～65℃恒温鼓风干燥6～7h,以1.0%的海藻酸钠胶体浸泡1min后继续干燥1～2h,制得成品的色、香、味、形俱佳。  相似文献   

秋季不同色泽五叶地锦叶片生理生化特性的研究   总被引：3，自引：0，他引：3  

史宝胜  孟建朝  刘冬云  刘栋  吴雪梅 《华北农学报》2009,24(Z2)

为明确秋季不同叶色五叶地锦叶片的生理差异,以秋季同一植株上红色、中间色、绿色三种颜色的五叶地锦叶片为试材,测定了叶片中色素物质含量、酶活性以及叶片可溶性内含物的含量,结果表明:在红色叶片中,叶绿素含量较低,PAL、POD酶活性较高,花青素苷/叶绿素的比值较大,从而使R/G的值增大,叶色显现红色;而在绿色叶片中,叶绿素含量较高,PAL、POD酶活性较小,花青紊苷/叶绿素的比值较低,R/G的值降低,叶片显现绿色.通过可溶性内含物测定可知,在红色叶片中的可溶性糖和蛋白质含量相对较高,与花青素苷/叶绿素的比值达到显著相关水平,表明这些内含物的积累有利于花色素苷的合成.  相似文献   

辣椒雄性不育系小孢子发育及脯氨酸等含量的研究   总被引：9，自引：1，他引：9  

孙立全  霍治军  常彩涛  张成合  李明  刘文明 《华北农学报》2003,18(4):39-41

对辣椒雄性不育系9601-A和保持系9601-B的小孢子发育过程及其脯氨酸、可溶性蛋白、粗蛋白的含量和过氧化物酶、多酚氧化酶的活性进行了观察和测定。结果表明，9601-A的雄性败育发生在减数分裂末期Ⅱ阶段，导致败育的主要原因是花药绒毡层细胞的高度液泡化，致使小孢子在发育过程中得不到正常的营养供给而死亡；不育系花药可溶性蛋白和粗蛋白(总蛋白)含量均显著低于其保持系，而过氧化物酶和多酚氧化酶的活性则高于其保持系。  相似文献   

患出血病鲫鱼主要组织可溶性蛋白质变化的研究   总被引：4，自引：0，他引：4  

徐欣  彭永康 《华北农学报》2003,18(4):99-103

采用SDS-聚丙烯酰胺凝胶电泳法(SDS-PAGE)对正常和患出血病的鲫鱼心、肝、肾、鳃、脑、肌肉、肠、眼8种组织中可溶性蛋白质进行比较分析。结果表明：病鱼的心、肝、肾、鳃、脑、肌肉6种组织的蛋白质电泳谱带与正常鱼相比有较大变化，心和肾各缺失5条谱带；肝新诱导出1条谱带，另有1条谱带缺失；鳃中新诱导出2条谱带，有2条谱带缺失；脑中增加了4条新谱带，1条谱带缺失；肌肉新增5条谱带。说明鱼在遭受病原菌侵袭后，蛋白质的合成代谢受到较大影响。这些变化可作为辅助疾病诊断的生化指标。  相似文献   

Evaluating foliar nitrogen compounds as indicators of nitrogen status in Prunus persica trees     

Oswaldo A. Rubio-Covarrubias  Patrick H. Brown  Steven A. Weinbaum  R. Scott Johnson  Raul I. Cabrera 《Scientia Horticulturae》2009

Mobile nitrogen (N) forms may be better N indicators of the N status of trees than total nitrogen (TN) due to their higher sensitivity to increasing N supply. A field experiment was carried out over a 3-year period to compare foliar concentrations of total N (TN), soluble N (SN), chlorophyll (Minolta SPAD readings), NH₄–N and NO₃–N as indicators of soil N availability in nectarine, Prunus persica L. Batsch, cv. ‘Fantasia’ (grafted on ‘Nemaguard’ peach, P. persica × P. davidiana) trees. Young trees were exposed to a range of fertilizer-N application rates. Based on correlation analysis, the best association between leaf N compounds with soil N supply and trunk diameter and/or fruit yield was obtained with TN and chlorophyll SPAD readings. Leaf concentrations of mobile N compounds (NH₄–N and NO₃–N) increased more than any other N compound under high N supply; however, their inconsistency among years and low leaf concentration difficult their use as N indicators. The optimum foliar TN for growth decreased with tree age, 4.4%, 3.6% and 3.3% in non-bearing 1-year-old trees, non-bearing 2-year-old trees and 3.3 fruit-bearing 3-year-old trees. The optimum SPAD readings were 40 in 2-year-old trees and 42 in 3-year-old trees. Stable N compounds (TN and chlorophyll SPAD) could be used to N diagnosis in the zone of N deficiency, and soluble N compounds (NH₄–N and NO₃–N) to diagnoses N excess.  相似文献   

Effects of fruit bagging on coloring and related physiology,and qualities of red Chinese sand pears during fruit maturation   总被引：1，自引：0，他引：1  

Chunhui Huang  Bo Yu  Yuanwen Teng  Jun Su  Qun Shu  Zaiquan Cheng  Liqiong Zeng 《Scientia Horticulturae》2009

Red Chinese sand pears (Pyrus pyrifolia Nakai) are particular to China. In order to determine the effects of fruit bagging treatments (including bag types, bag removal patterns and dates) on fruit qualities and to understand the mechanism of coloring of red Chinese sand pears, two experiments were carried out. In the first experiment, fruit of ‘Meirensu’ were firstly covered by light-impermeable paper bags with different levels of light permeable liners during their early development stage, then, the whole bag were/not removed or only the outer layer of bags were removed 3, 2 or 1 weeks before harvest. Thus, the fruit were/not totally re-exposed or were under different levels of sunlight transmission (80.31% or 34.71%). Non-bagged fruit were used as the control. Bagging treatments significantly affected the concentration of anthocyanin and the visual qualities of pear fruit. Compared to control, fruit re-exposed totally for 2 or 3 weeks accumulated the largest amount of anthocyanin and fruit receiving 80.31% and 34.71% of sunlight for 1–3 weeks could synthesize a little anthocyanin, indicating that high light intensity is imperative for coloring in red Chinese sand pears. Bagging treatments did not affect contents of total soluble sugars, but decreased organic acids contents in fruit. In the second experiment, fruit of ‘Meirensu’ and ‘Yunhongli No. 1’ were covered with only one type of light-impermeable bag during the early development stage and totally re-exposed after the bag removal 15 days before harvest. Fruit were then collected at different intervals to trace the time-course of coloring, and related physiology and inner qualities. With increasing time after the bag removal, the concentration of chlorophyll, carotenoid, flavonoid and total phenols changed little, but the concentration of anthocyanin accumulated extremely fast within 10 days after the bag removal in both cultivars and thereafter kept constant. ‘Yunhongli No. 1’ had higher anthocyanin contents and lower hue angle than ‘Meirensu’, indicating a higher potential of anthocyanin synthesis. After the bag removal, the sucrose contents and PAL activities increased gradually and correlation analysis revealed that they were highly correlated with anthocyanin accumulation in two cultivars. This study suggests that anthocyanin biosynthesis in red Chinese sand pears is a highly light dependent process and modified by genotypes. Based on the current results, in order to obtain red Chinese sand pear fruit with attractive appearance and good inner qualities, fruit must be covered with light-impermeable bags at the early stage of fruit development and the bag should be removed totally at least 10 days before harvest.  相似文献   

不同类型甜菜品种根中Mg^2＋-ATP酶活性和产质量的关系     

赫磊  ;王晔  ;李丹  ;石晓艳  ;丁广洲  ;马凤鸣 《中国甜菜》2009,(3):5-8

测定不同类型甜菜品种各生育时期根中Mg^2＋-ATP酶活性、可溶性总糖、可溶性蛋白含量和产量、含糖率。结果表明,在幼苗期和叶丛繁茂期,Mg^2＋-ATP活性呈先上升后下降趋势,从块根增长期直至糖分积累期,Mg^2＋-ATP酶的活性逐渐增强,并保持在全生育期最高水平。不同类型品种间存在差异,在各生育时期高糖型品种Mg^2＋-ATP酶活性较强。根中Mg^2＋-ATP酶活性与根中可溶性总糖呈正相关,与甜菜根的成熟进程正相关;Mg^2＋-ATP酶活性与可溶性蛋白质舍量呈负相关,对可溶性糖的积累方面,二者的作用刚好相反。高糖型品种的可溶性总糖含量较高．相应的根中蛋白质含量很低。Mg^2＋-ATP酶活性较高．  相似文献   

云南陇川县水田甘蔗高产高糖种植技术     

邓美峰  方陶伟 《中国甜菜》2009,(4):52-53

介绍了云南陇川县水田新植和宿根甘蔗的高产高糖种植技术。  相似文献   

低温弱光对西葫芦幼苗渗透调节物质的影响   总被引：3，自引：1，他引：2  

侯永平  陈年来  康恩祥  张玉鑫 《中国瓜菜》2009,22(1)

以西葫芦品种早青一代为试材,研究了不同低温弱光组合及低温弱光持续时间对西葫芦幼苗渗透调节物质的影响。结果表明:可溶性蛋白质含量随低温弱光逆境程度加剧和持续时间延长持续减少;在15℃/5℃以上,弱光处理渗透调节物质游离脯氨酸、可溶性糖含量增加,但增加幅度随着弱光逆境加剧和持续时间延长而减弱;但在15℃/5℃下,弱光逆境导致游离脯氨酸、可溶性糖含量先增加后降低。  相似文献   

基于全局协调的甘蔗收获机械物流系统的研究     

刘东美  李尚平  梁式  麻芳兰  纪东伟 《农机化研究》2009,31(9)

甘蔗物流系统模型主要包括扶蔗、砍蔗、输送、剥叶等过程.每个部件之间能否协调运作,匹配是否合理,相互之间衔接和位置布局是否符合要求都是设计的关键.通过对甘蔗收获机械在收获过程中,甘蔗遍历的过程及各机构的运动原理,在基于全局协调理论的基础上,采用机械优化设计中迭代优化的方法,对各机构的运动参数和协调参数进行优化,达到甘蔗在收获过程中的最优的甘蔗收获机械物流系统模型.  相似文献