共查询到18条相似文献，搜索用时 140 毫秒
1.
超甜玉米乳熟期主营养成分动态分析 总被引：1，自引：0，他引：1
目的:分析不同超甜玉米乳熟期主营养成分的变化。方法:以云甜玉9号和秦隆98两个超甜玉米为材料,动态分析了乳熟期玉米籽粒水分含量、百粒重、蔗糖、果糖、维生素C、维生素E、蛋白质、淀粉等营养成分含量变化趋势。结果:在授粉后7~35 d,不同超甜玉米品种百粒重增重速率不同,呈先上升后下降的趋势,其中云甜玉9号在授粉后28d达到最大值,秦隆98在授粉后21d达到最大值。随着灌浆时间的推进,不同超甜玉米品种籽粒营养成分在授粉后14~35 d存在较大差异,超甜玉米籽粒水分和蔗糖含量逐渐下降,而淀粉和蛋白质含量不断增加,果糖、维生素C、维生素E含量均呈"抛物线"变化。结论:该研究可为超甜玉米的目标育种、遗传改良提供理论依据。 相似文献
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甜玉米的研究现状与发展 总被引：3，自引：0，他引：3
邵振中 《襄樊职业技术学院学报》2004,3(4):23-25
甜玉米是一种营养丰富、利用率高、适口性好、经济效益高的新型玉米，具有甜、粘、嫩、香的特点．有“水果玉米”、“蔬菜玉米”之称。从营养品质、加工利用、采收期及保鲜技术等方面对甜玉米的研究现状进行了综述。 相似文献
3.
目的:测定不同产地、不同采收期红景天总多糖含量变化,以确定其最佳采收期.方法:采用蒽酮-硫酸比色法,以葡萄糖作为对照品,在620nm波长下测定吸光度,对不同产地、不同采收期红景天多糖含量进行测定.结论:不同产地红景天的总多糖含量不同,西藏大花红景天的含量最高,然后依次是青海大花红景天,西藏圣地红景天,四川大花红景天,临江高山红景天.临江不同采收期的高山红景天的总多糖含量有差异,建议采收高山红景天的适宜时间为7-9月,尤以9月左右为宜.从回收率和精密度可看出,蒽酮-硫酸比色法是一种常用的测定方法,该方法简便、可靠、易行. 相似文献
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谭黎峰 《广西师范大学学报(哲学社会科学版)》1998,(Z2)
国内外许多资料均报导,铜(Ⅱ)、锌(Ⅱ)等金属的某些希夫碱配合物具有生物活性和催化活性。由于2,6-二乙酰吡啶(简称DAP)其2,6位上的两个羰基与吡啶环相连,可形成大π共轭体系而具有活性,很易与伯胺进行缩合形成希夫碱。以DAP作为母体的含氮双希夫碱配 相似文献
6.
冯丽君高中地理名师工作室 《地理教育》2014,(5):42-44
甜玉米（水果玉米）起源于南美洲印地安玛雅民族地区,欧美国家栽培广,近些年引入中国栽培。目前以甜玉米为原料的加工方法主要有：真空保鲜果穗加工、速冻果穗加工、嫩果籽粒加工制罐、制成甜玉米浆、甜玉米汁等蔬菜、饮料制品。据此完成1～3题。 相似文献
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对甜玉米含糖量与部分品质性状之间进行相关通径分析.结果表明：甜玉米含糖量与维生素C含量呈显著正相关（r=0.5768^＊＊）〉淀粉含量（r=-0.1655）〉蛋白质含量（r=-0.0395）,通径分析和相关分析结果相一致. 相似文献
8.
人工老化对甜玉米种子活力及抗氧化指标变化分析 总被引：1，自引：0，他引：1
以甜玉米种子为试验材料,研究了人工老化时间对种子活力及抗氧化指标的影响。结果表明,随着老化时间的延长,不同甜玉米种子的发芽势、发芽率都逐渐降低,在种子老化6d后,种子发芽率降低了46%~50%;而种子发芽指数、活力指数变化趋势则因品种而异;在甜玉米种子成熟老化过程中,VE含量先升高再降低,甜玉米种子中的SOD、POD、CAT酶活性均逐渐升高,并且随着老化程度的加剧,不同甜玉米种子中的SOD、CAT酶活性差异不明显,而POD酶活性则和种子发芽率呈负相关。 相似文献
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试验以3个代表性的超甜玉米品种为试材，设计了7种种子处理方法，采用随机区组设计，研究在早播气温较低的条件下，种子处理对提高超甜玉米种子的田间出苗率、成苗率的影响。结果表明，在温度较低的早春播种，种子处理方法对提高甜玉米种子的田间出苗率、成苗率效果显著，最高可提高田间出苗35．2％；以噻酮、丙酮、氮酮的处理效果最好。本研究中的种子处理方法，与以往的方法比较，具有安全无毒、操作简便的优点，可以更好地指导甜玉米生产。 相似文献
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Dong-dong CAO Jin HU Xin-xian HUANG Xian-ju WANG Ya-jing GUAN Zhou-fei WANG 《Journal of Zhejiang University. Science. B》2008,9(12)
The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d aider pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages. 相似文献
12.
Dong-dong Cao Jin Hu Xin-xian Huang Xian-ju Wang Ya-jing Guan Zhou-fei Wang 《Journal of Zhejiang University. Science. B》2008,9(12):964-968
The changes of kernel nutritive components and seed vigor in F1 seeds of sh
2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series
regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while
starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination,
germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after
pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters
determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between
seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content
and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that
the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing
sugar in sweet corn seeds during seed development stages.
Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang
Province, China (No. 20070147) 相似文献
13.
以白骨壤果实（即榄钱果）为主要原料,加工成甜酥榄钱果和五香榄钱果.结合感观评定指标,从配料、油炸温度、油炸时间等方面进行正交试验,确定甜酥榄和五香榄钱果二种最佳工艺方案,同时进行理化指标检测.结果表明,加工后的甜酥榄和五香榄二种钱果的粗脂肪质量分数分别为0.725%和136%、可溶性总糖质量分数分别为65.27%和51.40%、过氧化值分别为0.072%和0.051%,加工后的甜酥榄钱果和五香榄钱果食品粗脂肪含量、可溶性总糖含量都增加,过氧化值均未超过标准值0.25 g/100 g. 相似文献
14.
苏爱国 《扬州职业大学学报》2012,16(3):44-46,62
探讨提取青砖茶茶汤的最佳温度、时间、料水比等工业化生产技术参数。研究以青砖茶、鲜奶为材料生产甜味和成味奶茶的配方。结果表明：青砖茶料水比为1：80（g·mL^-1）,温度90℃,时间110min;茶汤与奶的比例为6：4,添加4％的糖,0．5％的盐,制得的产品具有独特风味。 相似文献
15.
《天津大学学报(英文版)》2015,(5)
Ethanol-water near-azeotropic mixture dehydration was investigated by formulated compound starchbased adsorbent(CSA), which consists of corn, sweet potato and foaming agent. The net retention time and separation factor of water over ethanol were measured by inverse gas chromatography(IGC). Results indicated that water has a longer net retention time than ethanol and that low temperature is beneficial to this dehydration process. Orthogonal test was conducted under different vapor feed flow rates, bed temperatures and bed heights, to obtain optimal fixed-bed dehydration condition. Dynamic saturated adsorbance was also studied. It was found that CSA has the same water adsorption capacity(0.15 g/g)as some commercial molecular sieves. Besides, this biosorptive dehydration process was found to be the most energy-efficient compared with other ethanol purification processes. 相似文献
16.
红薯味酸牛奶的发酵工艺研究 总被引：1，自引：0，他引：1
本实验利用从超市购得的原味的酸牛奶作为接种菌种,与打浆、糊化、糖化后的红薯浆混合,经过发酵及后发酵,得到特有具有红薯芳香的新型酸牛奶．通过实验研究,得出红薯酸牛奶发酵的最佳工艺条件为：原料乳、蔗糖量、接种量、红薯浆量所占体积分别为50％、8％、15％、27％;发酵时间为4小时,发酵温度为40℃． 相似文献
17.
通过对豫东地区玉米收获机械化状况进行调查,发现该地区玉米收获机械化水平相当落后,根据农业机械化发展水平评价指标体系和“三化”发展要求,从农机与农艺结合、科技研发和政策支持、发展生态农业及配套产业等方面采取措施,提高玉米收获机械化水平,促进豫东地区新型农业现代化发展． 相似文献