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排序方式: 共有122条查询结果,搜索用时 31 毫秒
101.
Paul L. Chariou Lu Wang Cian Desai Jooneon Park Leanna K. Robbins Horst A. von Recum Reza A. Ghiladi Nicole F. Steinmetz 《Macromolecular bioscience》2019,19(5)
The development of plant viral nanoparticles (VNP) loaded with different molecular versions of a photodynamic drug is described. Specifically, tobacco mosaic virus (TMV) and tobacco mild green mosaic virus (TMGMV) are developed as drug carriers that encapsulate the monocationic, dicationic, tricationic, and tetracationic versions of a porphyrin‐based photosensitizer drug (Zn‐Por). While TMV has been extensively explored for various nanotechnology applications, this is the first study investigating TMGMV for medical applications. Light‐activated cancer cell killing of Zn‐Por‐loaded VNPs is studied in vitro using melanoma and cervical cancer models. Native and nucleolin‐targeted VNP drug carriers are developed and their efficacy assessed. A fivefold increase in cancer cell killing is observed using nucleolin‐targeted TMV loaded with tricationic Zn‐Por and displaying the nucleolin‐specific F3 peptide. 相似文献
102.
Ferdinand Kisslinger Dennis Rienmüller Christian Ott Erik Kampert Heiko B. Weber 《Annalen der Physik》2019,531(7)
A simple route to generate magnetotransport data is reported that results in fractional quantum Hall plateaus in the conductance without invoking strongly correlated physics. Ingredients to the generating model are conducting tiles with integer quantum Hall effect and metallic linkers, further Kirchhoff rules. When connecting few identical tiles in a mosaic, fractional steps occur in the conductance values. Richer spectra representing several fractions occur when the tiles are parametrically varied. Parts of the simulation data are supported with purposefully designed graphene mosaics in high magnetic fields. The findings emphasize that the occurrence of fractional conductance values, in particular in two‐terminal measurements, does not necessarily indicate interaction‐driven physics. The importance of an independent determination of charge densities is underscored and similarities with and differences to the fractional quantum Hall effect are critically discussed. 相似文献
103.
A. Cesaratto P. Sichel D. Bersani P. P. Lottici A. Montenero E. Salvioli‐Mariani M. Catarsi 《Journal of Raman spectroscopy : JRS》2010,41(12):1682-1687
The method based on the deconvolution of the Raman spectra of glasses, proposed for the investigation of glazed ceramics by Colomban, is applied to archeological samples of glass of two different origins in an attempt to characterize the glass composition and the fictive temperature using a contactless, nondestructive spectroscopic technique. The samples investigated are glassy mosaic tesserae of Roman times from Massa Lubrense, Napoli, Italy, and medieval rosary grains found during the excavations in the church of San Martino di Rivosecco, Parma, Italy. The polymerization index, obtained as the ratio of the bending and stretching band amplitudes, suggests firing temperatures not less than 1000–1100 °C for both Roman and medieval glasses. From the wavenumber shift of some stretching bands at about 1050–1100 cm−1, the content of lead was estimated. The medieval samples show a lower Pb content, a result confirmed by elementary energy dispersive X‐ray spectral data. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
104.
B. I. Belyaev Yu. V. Belyaev L. V. Katkovskii T. M. Kurikina A. A. Kazak V. I. Shuplyak 《Journal of Applied Spectroscopy》2004,71(2):263-269
A technique of surveying forest territories from on board the VSC-2 helicopter using a videospectral complex for forest monitoring is described. The results of processing the obtained spectrozonal images with separation of the areas occupied by different species and withering spruce trees are presented. 相似文献
105.
106.
Qinpeng Shen Xingmeng Xu Chunbo Liu Wei Zhao Nengjun Xiang Yongkuan Chen 《Natural product research》2016,30(22):2545-2550
Two new sesquiterpenes, nicotianasesterpenes A and B (1 and 2), together with five known sesquiterpenes (3–7) were isolated from the leaves of Nicotiana tabacum. Their structures were determined mainly by spectroscopic methods, including extensive 1D- and 2D-NMR techniques. The anti-tobacco mosaic virus (anti-TMV) activities of compounds 1–7 were evaluated. The results revealed that compound 1 exhibited high anti-TMV activities with inhibition rates of 33.6%. This rate is high than that of positive control. The other compounds also showed potential activities with inhibition rates in the range of 18.8–28.4%, respectively. 相似文献
107.
G. Bertholon R. Perrin R. Lamartine A. Thozet M. Perrin J. Caillet 《Molecular Crystals and Liquid Crystals》2013,570(1):285-292
It is shown that the charge transfer is negligible in the ground state for organic charge transfer complexes between phenols and quinones. Our objective Is to determine the origin of the stability of the complexes. The geometric, electronic and energetic properties of these complexes were examined by three techniques, crystal structure determination by X-ray diffraction, spectrum and charge transfer calculation by quantum chemical methods, and lattice energy computation. 相似文献
108.
109.
PENG Bo LIU NingNing LIN Yuan WANG LiMing ZHANG WenKe NIU ZhongWei WANG Qian & SU ZhaoHui State Key Laboratory of Polymer Physics Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China State Key Laboratory of Supramolecular Structure Materials College of Chemistry Jilin University Changchun China 《中国科学B辑(英文版)》2011,(1)
A facile approach to assembled virus film with tunable structure is presented.Rod-like tobacco mosaic virus (TMV) was selected as the prototype in this study for its anisotropic structural feature.TMV can either lie down or stand up on gold substrate by tuning the solution pH.A quartz crystal microbalance with dissipation monitoring was used to monitor the pH-dependent self-assembly behavior of TMV nanoparticles,and atomic force microscopy and single molecule force spectroscopy further confirmed the differe... 相似文献
110.
Wen-hai Zhan Hannah N. Barnhill Krishnamoorthy Sivakumar Qian Wang 《Tetrahedron letters》2005,46(10):1691-1695
A new type of 2-propynyl substituted hemicyanine dyes have been synthesized in a facile route, which have showed superior solubility in water and good optical properties. The terminal alkynyl groups were employed for bioconjugation through a 1,3-dipolar cycloaddition with azides under mild conditions. 相似文献