排序方式: 共有41条查询结果,搜索用时 15 毫秒
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Liliana Rosu Dan Rosu Cristian-Catalin Gavat Cristian-Dragos Varganici 《Journal of Materials Science》2014,49(13):4469-4480
The influence of ultraviolet irradiation of different doses (λ > 300 nm) on the structural and color modifications of cotton fabrics painted with four different azo-triazine dyes (Reactive Yellow 143, Reactive Orange 13, Reactive Red 183, and Reactive Red 2) was studied. High irradiation doses up to 3500 J cm?2 led to changes in the dyes structures. Structural changes before and after the complete irradiation were compared by applying FTIR, UV–Vis, and near infrared chemical imaging techniques. Color modifications were also investigated. Color differences significantly increased with the irradiation dose for all the studied samples. 相似文献
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Marcela-Corina Rosu Ramona-Crina Suciu Maria Mihet Ioan Bratu 《Materials Science in Semiconductor Processing》2013,16(6):1551-1557
The titanium dioxide (TiO2)-based layers sensitized with carmine and morin dyes were prepared using commercial P25 TiO2 powder as starting material. The influence of natural colorants as natural photosensitizers on TiO2 photoactivity was discussed from the point of view of UV–VIS and Fourier transform infra-red (FTIR) spectroscopy, fluorescence analysis, microscopy, X-ray diffraction and nitrogen adsorption-desorption isotherms determination. A shift to visible region of the sensitized TiO2 layers is observed. The decrease of sensitized TiO2 band gap improves its photoactivity in the visible domain. The fluorescence quenching of TiO2 sensitized with carmine is correlated with better adsorption of the dye molecules to the TiO2 surface and with electron injection process, also. The FTIR absorption spectra of samples proved the presence of dye molecules on TiO2 nanoparticles surface. Thus, the investigated sensitized TiO2-based layers could have potential in photoelectrochemical applications. 相似文献
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Carrasco C Rosu F Gabelica V Houssier C De Pauw E Garbay-Jaureguiberry C Roques B Wilson WD Chaires JB Waring MJ Bailly C 《Chembiochem : a European journal of chemical biology》2002,3(12):1235-1241
The structural selectivity of the DNA-binding antitumor drug ditercalinium was investigated by competition dialysis with a series of nineteen different DNA substrates. The 7H-pyridocarbazole dimer was found to bind to double-stranded DNA with a preference for GC-rich species but can in addition form stable complexes with triplex and quadruplex structures. The preferential interaction of the drug with four-stranded DNA structures was independently confirmed by electrospray mass spectrometry and a detailed analysis of the binding reaction was performed by surface plasmon resonance (SPR) spectroscopy. The BIAcore SPR study showed that the kinetic parameters for the interaction of ditercalinium with the human telomeric quadruplex sequence are comparable to those measured with a duplex sequence. Slow association and dissociation were observed with both the quadruplex and duplex structures. The newly discovered preferential binding of ditercalinium to the antiparallel quadruplex sequence d(AG(3)[T(2)AG(3)](3)) provides new perspectives for the design of drugs that can bind to human telomeres. 相似文献
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Today, affordable storage media comes in various form factors with a wide range of capacities. USB is the most popular PC interface, offering data transfer rates as high as 480 Mbps (version 2.0), with enough power to operate storage devices such as 2.5" hard-disk drives. The Fire Wire interface offers similar capabilities. A few vendors offer software that lets users synchronize their email and network folders with USB storage. This lets them access these data items from several different computers. The U3 industry consortium promotes a model that lets users run programs, such as a Firefox Web browser, directly from the USB storage device, so users can access these applications even on PCs that don't have these applications preinstalled. Similarly, commonly used live CD-ROMs let you boot a PC from an OS resident on the CD-ROM. In this new mobile computing model called portable storage-based personalization, users can personalize a computer by booting from the USB storage media. Users' portable storage devices act as a pocket hard drive. 相似文献
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C. Ciobanu E. Stoica C. N. Cascaval D. Rosu L. Rosu M. State A. Emandi I. Nemes F. Petrescu 《应用聚合物科学杂志》2007,103(2):659-669
Polyurethane (PU) with lactate structures in its conformation can be used as a biological and biodegradable polymer. Polyurethane lactate (PUL) was doped with small quantities of an erbium (Er3+) complex, which hindered the N?N group. 2,2′‐Dihydroxyazobenzene was used as a ligand for the Er3+ complex. PUL in the presence of the used Er3+ complex caused water from the complex to be replaced by the polar structures from the polymer. These structures acted as crystallization germs for the structuration of the PU matrix. As a consequence, both the mechanical and thermal properties of the polymer were improved. The sample with the highest mechanical properties contained only 0.064 μmol of Er3+ complex/g of sample. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 659–669, 2007 相似文献
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Huneault M. Rosu C. Manoliu R. Galiana F.D. 《Power Systems, IEEE Transactions on》1994,9(4):1825-1832
This paper presents a global view of knowledge engineering (KE) applications in the field of power systems. In particular, it investigates the choice of commercially available KE tools used in projects of power system analysis, design, operation and planning. The initial viewpoint of the study was to uncover the advantages of the various tools for particular power engineering problems, as established in the literature. The paper starts by identifying and classifying the tools in question. Power areas where KE has flourished are also identified. A list of the KE tools identified in the power literature is then compiled and analyzed. The results of the literature study are complemented by responses to a survey from leading practitioners in the field. The paper draws its conclusions as to the (non-) correlation of tools and applications, and recommends that knowledge modeling serve as an important criterion in the choice of tools 相似文献
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Marius Beul Matthias Nieuwenhuisen Jan Quenzel Radu Alexandru Rosu Jannis Horn Dmytro Pavlichenko Sebastian Houben Sven Behnke 《野外机器人技术杂志》2019,36(1):204-229
The Mohamed Bin Zayed International Robotics Challenge (MBZIRC) 2017 has defined ambitious new benchmarks to advance the state‐of‐the‐art in autonomous operation of ground‐based and flying robots. This study covers our approaches to solve the two challenges that involved micro aerial vehicles (MAV). Challenge 1 required reliable target perception, fast trajectory planning, and stable control of an MAV to land on a moving vehicle. Challenge 3 demanded a team of MAVs to perform a search and transportation task, coined “Treasure Hunt,” which required mission planning and multirobot coordination as well as adaptive control to account for the additional object weight. We describe our base MAV setup and the challenge‐specific extensions, cover the camera‐based perception, explain control and trajectory‐planning in detail, and elaborate on mission planning and team coordination. We evaluated our systems in simulation as well as with real‐robot experiments during the competition in Abu Dhabi. With our system, we—as part of the larger team NimbRo—won the MBZIRC Grand Challenge and achieved a third place in both subchallenges involving flying robots. 相似文献
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Amrane S De Cian A Rosu F Kaiser M De Pauw E Teulade-Fichou MP Mergny JL 《Chembiochem : a European journal of chemical biology》2008,9(8):1229-1234
DNA hairpin structures formed within a repeated tract might be a causative factor for triplet expansion observed in several debilitating diseases. We have designed and used a fluorescence resonance energy transfer (FRET) melting assay to screen for ligands that bind specifically to the CNG triplet repeats. Using this assay, we screened a panel of 33 chemicals that were previously designed to bind DNA or RNA secondary structures. Remarkably, we found that macrocyclic compounds, such as acridine dimers and trimers, exhibit interesting affinities and specificities for this motif. 相似文献