Genista numidica Spach ssp numidica （Spach） Batt. is a northeast Algerian endemic plant; the aim of this work is about the phytochemical screening, the microscopic analysis and the antimicrobial activity of the aeri...Genista numidica Spach ssp numidica （Spach） Batt. is a northeast Algerian endemic plant; the aim of this work is about the phytochemical screening, the microscopic analysis and the antimicrobial activity of the aerial parts of this species （stems, flowers, seeds and pods）; there is a wealth in polyphenolic compounds： flavonoids （method of Charaux, Paris, 1964） and saponins （method of Braune et al, 1969）, tannins, terpenes, sterols and fatty acids. The microscopic analysis doesn＇t allow a differential identification of the species. The results of aromatogram by the incorporation method of Muller-Hinton on solid medium, showed a significant antimicrobial activity （method Duraffourd,1987） of the extracts, infusion, and the active substances towards bacterial strains, essentially those recognized as antibiotic resistant （Staphylococcus, Acinetobacter, Pseudomonas, Enterobacter, Citrobacter）; the results obtained indicate that the most efficient antibacterial activity was obtained with the pod infusion, the seed extract and the flavonoids. The raw extract has an important antifungal activity on Candida albicans. This could open opportunities for using this species in the treatment of urinary, respiratory, intestinals and cutaneous infections, and as a disinfecting additive on nosocomial area.展开更多
As one of the important components of computational flight mechanics and control,numerical algorithms of trajectory optimization for flight vehicles are currently studied by many researchers in aerospace engineering t...As one of the important components of computational flight mechanics and control,numerical algorithms of trajectory optimization for flight vehicles are currently studied by many researchers in aerospace engineering to completely solve these difficult problems,but few papers on the survey of this research field have been published recently.Based on the investigation of more than one hundred literatures,considering the application perspectives of computational flight mechanics and recent developments of trajectory optimization,the numerical algorithms of trajectory optimizations for aerospace vehicles are summarized and systematically analyzed.This paper summarized the basic principle,characteristics and application for all kinds of current trajectory optimization algorithms;and introduced some new methods and theories appearing in recent years.Finally,collaborative trajectory optimization for many flight vehicles,and hypersonic vehicle trajectory optimization were mainly reviewed in this paper.In the conclusion of this paper,the future research properties are presented regarding to numerical algorithms of trajectory optimization and control for flight vehicles as follows:collaboration and antagonization for many flight vehicles and multiple targets,global,real-time online,high accuracy of 7-D trajectory,considering all kinds of unknown random disturbances in trajectory optimization,and so on.展开更多
文摘Genista numidica Spach ssp numidica （Spach） Batt. is a northeast Algerian endemic plant; the aim of this work is about the phytochemical screening, the microscopic analysis and the antimicrobial activity of the aerial parts of this species （stems, flowers, seeds and pods）; there is a wealth in polyphenolic compounds： flavonoids （method of Charaux, Paris, 1964） and saponins （method of Braune et al, 1969）, tannins, terpenes, sterols and fatty acids. The microscopic analysis doesn＇t allow a differential identification of the species. The results of aromatogram by the incorporation method of Muller-Hinton on solid medium, showed a significant antimicrobial activity （method Duraffourd,1987） of the extracts, infusion, and the active substances towards bacterial strains, essentially those recognized as antibiotic resistant （Staphylococcus, Acinetobacter, Pseudomonas, Enterobacter, Citrobacter）; the results obtained indicate that the most efficient antibacterial activity was obtained with the pod infusion, the seed extract and the flavonoids. The raw extract has an important antifungal activity on Candida albicans. This could open opportunities for using this species in the treatment of urinary, respiratory, intestinals and cutaneous infections, and as a disinfecting additive on nosocomial area.
基金supported by the Fundatmental Research Funds for the Central Universities of China (Grant No. CXZZ11_0215)
文摘As one of the important components of computational flight mechanics and control,numerical algorithms of trajectory optimization for flight vehicles are currently studied by many researchers in aerospace engineering to completely solve these difficult problems,but few papers on the survey of this research field have been published recently.Based on the investigation of more than one hundred literatures,considering the application perspectives of computational flight mechanics and recent developments of trajectory optimization,the numerical algorithms of trajectory optimizations for aerospace vehicles are summarized and systematically analyzed.This paper summarized the basic principle,characteristics and application for all kinds of current trajectory optimization algorithms;and introduced some new methods and theories appearing in recent years.Finally,collaborative trajectory optimization for many flight vehicles,and hypersonic vehicle trajectory optimization were mainly reviewed in this paper.In the conclusion of this paper,the future research properties are presented regarding to numerical algorithms of trajectory optimization and control for flight vehicles as follows:collaboration and antagonization for many flight vehicles and multiple targets,global,real-time online,high accuracy of 7-D trajectory,considering all kinds of unknown random disturbances in trajectory optimization,and so on.
