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Deficit irrigation strategies enhance health‐promoting compounds through the intensification of specific enzymes in early peaches 下载免费PDF全文
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Mellisho CD González-Barrio R Ferreres F Ortuño MF Conejero W Torrecillas A García-Mina JM Medina S Gil-Izquierdo A 《Journal of the science of food and agriculture》2011,91(12):2132-2139
BACKGROUND This study was designed to describe the phenolic status of lemon juice obtained from fruits of lemon trees differing in iron (Fe) nutritional status. Three types of Fe(III) compound were used in the experiment, namely a synthetic chelate and two complexes derived from natural polymers of humic and lignine nature. RESULTS All three Fe(III) compounds were able to improve the Fe nutritional status of lemon trees, though to different degrees. This Fe(III) compound effect led to changes in the polyphenol content of lemon juice. Total phenolics were decreased (~33% average decrease) and, in particular, flavanones, flavones and flavonols were affected similarly. CONCLUSION Iron‐deficient trees showed higher phenolic contents than Fe(III) compound‐treated trees, though Fe deficiency had negative effects on the yield and visual quality of fruits. However, from a human nutritional point of view and owing to the health‐beneficial properties of their bioavailable phenolic compounds, the nutritional quality of fruits of Fe‐deficient lemon trees in terms of phenolics was higher than that of fruits of Fe(III) compound‐treated lemon trees. Moreover, diosmetin‐6,8‐di‐C‐glucoside in lemon juice can be used as a marker for correction of Fe deficiency in lemon trees. Copyright © 2011 Society of Chemical Industry 相似文献
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Aspect-Oriented Requirements Engineering focuses on the identification and modularisation of crosscutting concerns at early stages. There are different approaches in the requirements engineering community to deal with crosscutting concerns, introducing the benefits of the application of aspect-oriented approaches at these early stages of development. However, most of these approaches rely on the use of Natural Language Processing techniques for aspect identification in textual documents and thus, they lack a unified process that generalises its application to other requirements artefacts such as use case diagrams or viewpoints. In this paper, we propose a process for mining early aspects, i.e. identifying crosscutting concerns at the requirements level. This process is based on a crosscutting pattern where two different domains are related. These two different domains may represent different artefacts of the requirements analysis such as text and use cases or concerns and use cases. The process uses syntactical and dependency based analyses to automatically identify crosscutting concerns at the requirements level. Validation of the process is illustrated by applying it to several systems and showing a comparison with other early aspects tools. A set of aspect-oriented metrics is also used to show this validation. 相似文献
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A model-driven approach for reusing tests in smart home systems 总被引:1,自引:0,他引:1
José M. Conejero Pedro J. Clemente Roberto Rodríguez-Echeverría Juan Hernández Fernando Sánchez-Figueroa 《Personal and Ubiquitous Computing》2011,15(4):317-327
The continuous advances of ubiquitous and pervasive computing have contributed to the successful increase in smart home systems.
However, usually these systems are developed at a lower abstraction level very tied to specific technologies. Model-driven
approaches have emerged to tackle the design of these systems, improving their reusability and maintainability and decreasing
their complexity. Nevertheless, the existing model-driven approaches to develop smart home systems do not cover the whole
development process, and testing activities are still relegated to the final programming stages, reducing their reusability
for different technologies or platforms. Some approaches have proposed the incorporation of testing activities into the model-driven
process. However, the test models defined are very tied to the specific systems and they must be redesigned for every new
system to test, reducing thus the reusability of the test behavior. In this setting, this paper presents a process to define
reusable tests that may be automatically applied to different smart home systems. The process is integrated into a whole MDD
approach that provides support for the modeling of smart home systems at two different abstraction levels, ensuring the reusability
of tests also for different smart home platforms. 相似文献
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Context
Maintainability has become one of the most essential attributes of software quality, as software maintenance has shown to be one of the most costly and time-consuming tasks of software development. Many studies reveal that maintainability is not often a major consideration in requirements and design stages, and software maintenance costs may be reduced by a more controlled design early in the software life cycle. Several problem factors have been identified as harmful for software maintainability, such as lack of upfront consideration of proper modularity choices. In that sense, the presence of crosscutting concerns is one of such modularity anomalies that possibly exert negative effects on software maintainability. However, to the date there is little or no knowledge about how characteristics of crosscutting concerns, observable in early artefacts, are correlated with maintainability.Objective
In this setting, this paper introduces an empirical analysis where the correlation between crosscutting properties and two ISO/IEC 9126 maintainability attributes, namely changeability and stability, is presented.Method
This correlation is based on the utilization of a set of concern metrics that allows the quantification of crosscutting, scattering and tangling.Results
Our study confirms that a change in a crosscutting concern is more difficult to be accomplished and that artefacts addressing crosscutting concerns are found to be less stable later as the system evolves. Moreover, our empirical analysis reveals that crosscutting properties introduce non-syntactic dependencies between software artefacts, thereby decreasing the quality of software in terms of changeability and stability as well. These subtle dependencies cannot be easily detected without the use of concern metrics.Conclusion
The correlation provides evidence that the presence of certain crosscutting properties negatively affects to changeability and stability. The whole analysis is performed using as target cases three software product lines, where maintainability properties are of upmost importance not only for individual products but also for the core architecture of the product line. 相似文献9.
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Rodriguez-Echeverria Roberto Macas Fernando Rutle Adrian Conejero Jos M. 《Software and Systems Modeling》2022,21(1):81-112
Software and Systems Modeling - Model transformations play an essential role in most model-driven software projects. As the size and complexity of model transformations increase, their reuse,... 相似文献