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柠檬花精油挥发性成分的GC-MS分析 被引量:7
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作者 尤桂春 林文忠 +4 位作者 陈品品 武竞超 蔡锦玲 姚文 蓝波妙 《南方农业学报》 CAS CSCD 北大核心 2020年第12期3020-3029,共10页
【目的】对柠檬8份种质资源的花进行精油提取和成分分析鉴定,分析8种柠檬花精油挥发性成分组成差异和相似度,为柠檬花资源的开发利用、不同种质柠檬亲缘关系鉴定及优质柠檬种质的筛选提供基础数据。【方法】利用水蒸气蒸馏法对福建省泉... 【目的】对柠檬8份种质资源的花进行精油提取和成分分析鉴定,分析8种柠檬花精油挥发性成分组成差异和相似度,为柠檬花资源的开发利用、不同种质柠檬亲缘关系鉴定及优质柠檬种质的筛选提供基础数据。【方法】利用水蒸气蒸馏法对福建省泉州市国家农业科技园区果蔬园柠檬良种筛选圃内尤力克、费米耐劳、印度大果、越南四季柠檬、台湾香水柠檬、漳州本地柠檬、北京柠檬和江苏2号等8份种质资源的花进行精油提取,运用气相色谱—质谱联用法(GC-MS)分析和鉴定其挥发性成分,并采用SPSS 22.0进行相似度分析。【结果】8份柠檬花精油出油率为0.052%~0.139%。共鉴定出151种挥发性成分,其中萜烯类52种、醇类47种、酯类15种、醛类11种、酮类10种、烷烃类7种、酚类4种、其他5种。尤力克共鉴定出挥发性成分54种,费米耐劳67种,印度大果27种,越南四季柠檬78种,台湾香水柠檬27种,漳州本地柠檬45种,北京柠檬42种,江苏2号42种。8份柠檬花精油共有成分8种,分别为D-柠檬烯、β-蒎烯、3-蒈烯、β-石竹烯、柠檬醛、芳樟醇、α-松油醇和香叶醇;特异性成分78种,其中尤力克6种、费米耐劳19种、印度大果2种、越南四季柠檬29种、台湾香水柠檬4种、漳州本地柠檬3种、北京柠檬7种、江苏2号8种。柠檬花精油中以萜烯类(35.29%~80.81%)、醇类(7.91%~43.04%)和醛类(0.19%~14.67%)相对含量较多,其中萜烯类中相对含量较高的有D-柠檬烯、β-蒎烯和3-蒈烯,醇类中相对含量较高的有合金欢醇和芳樟醇,醛类中相对含量较高的是柠檬醛。8份柠檬花精油间关系最近的是北京柠檬与江苏2号,相似度为0.996,最远的是越南四季柠檬与台湾香水柠檬,相似度为0.650。【结论】不同柠檬花精油出油率和成分的差异反映柠檬不同种质间的遗传差异。同时,柠檬花精油中含有的成分具有良好的开发和应用价值。 展开更多
关键词 柠檬花 精油 气相色谱—质谱联用(GC-MS) 成分
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Impact Factors of Construction Project Budget Preparation and Budget Quality Control
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作者 yaowen 《外文科技期刊数据库(文摘版)经济管理》 2022年第9期041-044,共4页
The rapid development of the construction industry makes the development scale of construction engineering get bigger and bigger, and the engineering construction needs to consume more energy resources. The use of the... The rapid development of the construction industry makes the development scale of construction engineering get bigger and bigger, and the engineering construction needs to consume more energy resources. The use of the cost is also high. If unreasonable to control, it will cause the waste of energy resources, but also will bring certain economic losses to the development of enterprises. And the project budget preparation, according to the actual situation of the project, plans the use of various costs in the project construction process, in order to achieve a higher quality control of the cost. However, the content of budgeting is generally more complex, and involves multiple processes, affecting many factors, and it is inevitable that various problems will appear in the actual development. Therefore, we should strengthen the control of budgeting quality, and take optimization measures to reduce the impact of relevant factors on the budgeting results, so as to save more construction costs and bring more economic benefits to enterprises. 展开更多
关键词 construction engineering BUDGETING influencing factors quality control
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Common Problems and Countermeasures of the Completion Settlement Audit of Construction Projects
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作者 yaowen 《外文科技期刊数据库(文摘版)经济管理》 2022年第8期041-044,共4页
The rapid development of the construction industry has effectively increased the scale of construction engineering and enriched the types of construction projects. In order to promote the development of the constructi... The rapid development of the construction industry has effectively increased the scale of construction engineering and enriched the types of construction projects. In order to promote the development of the construction industry towards a more standardized and professional direction, it is also necessary to do a good job of the overall control of construction costs, in order to improve the overall economic benefits of enterprises. Among them, the most important link is the project completion settlement audit, through the project audit, can intuitively understand the cost information in the process of project construction, fully grasp the dynamic use of funds, to avoid the waste of resources. However, the work of project completion settlement audit is generally more complex, and involves many process links, leading to many problems in the actual work. Therefore, in the follow-up work, we should pay attention to the professionalism and rationality of the project completion settlement audit work, so as to significantly improve the overall level of the construction project completion settlement audit. 展开更多
关键词 construction project completion settlement audit PROBLEMS COUNTERMEASURES
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