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排序方式: 共有260条查询结果,搜索用时 15 毫秒
1.
Tim Granath Karl Mandel Peer Löbmann 《Particle & Particle Systems Characterization》2021,38(8):2100098
This study demonstrates how the method of thermally assisted oxidative precipitation in water can be opened for—the so far neglected—metal organic iron(II) complexes (herein: citrate) in order to obtain, in one step, ferromagnetic magnetite nanoparticles, possessing essential ligand properties. Based on a dedicated analysis of the specific precursor in combination with the consideration of known properties of the ligand, it is possible to identify existing inhibition-attributes of the iron organyl such that these can be overcome. Moreover, they can be exploited in a targeted manner; thus, simply by changing concentrations, a variety of magnetite nanoparticle morphologies with distinct properties can be obtained. In the case of the herein investigated ferrous citrate, three major inhibition effects are identified. While two of them efficiently prevent the formation of magnetite and need to be addressed to be overcome, the third can be exploited to selectively synthesize, for example, relatively stable carboxyl group-bearing nuclei clusters, exhibiting the properties of magnetically responsive photonic crystals, or relatively large mesocrystals, whose intraparticular magnetic interactions are apparently disturbed. 相似文献
2.
Rainer Mandel 《Annals of Global Analysis and Geometry》2018,54(2):187-236
In this paper, we prove explicit formulas for all Willmore surfaces of revolution and demonstrate their use in the discussion of the associated Dirichlet boundary value problems. It is shown by an explicit example that symmetric Dirichlet boundary conditions do in general not entail the symmetry of the surface. In addition, we prove a symmetry result for a subclass of Willmore surfaces satisfying symmetric Dirichlet boundary data. 相似文献
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Novel Osmium‐based Coordination Complexes as Photosensitizers for Panchromatic Photodynamic Therapy 下载免费PDF全文
Savo Lazic Pavel Kaspler Ge Shi Susan Monro Tariq Sainuddin Sarah Forward Kamola Kasimova Robie Hennigar Arkady Mandel Sherri McFarland Lothar Lilge 《Photochemistry and photobiology》2017,93(5):1248-1258
Cancer remains a major global malaise requiring the advent of new, efficient and low‐cost treatments. Photodynamic therapy, which combines a photosensitizer and photons to produce cytotoxic reactive oxygen species, has been established as an effective cancer treatment but has yet to become mainstream. One of the main limitations has been the paucity of photosensitizers that are effective over a wide range of wavelengths, can exert their cytotoxic effects in hypoxia, are easily synthesized and produce few if any side effects. To address these shortfalls, three new osmium‐based photosensitizers (TLD1822, TLD1824 and TLD1829) were synthesized and their photophysical and photobiological attributes determined. These photosensitizers are panchromatic (i.e. black absorbers), activatable from 200 to 900 nm and have strong resistance to photobleaching. In vitro studies show photodynamic therapy efficacy with both red and near‐infrared light in normoxic and hypoxic conditions, which translated to good in vivo efficacy of TLD1829 in a subcutaneous murine colon cancer model. 相似文献
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Mandel A. M. Oshurko V. B. Pershin S. M. Karpova E. E. Artemova D. G. 《Doklady Physics》2021,66(6):160-163
Doklady Physics - It is been established that thin semiconductor quantum rings in an external magnetic field have unique selection properties: by choosing the type of heterostructure and the... 相似文献
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Paul Mandel 《Contemporary Physics》2013,54(5):235-246
The historical development that led to the modern concept of amplification and losing without inversion is reviewed. The two basic mechanisms for amplification without inversion and their theoretical formulation are discussed. Finally, the three experiments that confirm the occurrence of these effects are described. 相似文献
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Multidimensional nano-HPLC coupled with tandem mass spectrometry for analyzing biotinylated proteins
Jens Sproß Sebastian Brauch Friedrich Mandel Moritz Wagner Stephan Buckenmaier Bernhard Westermann Andrea Sinz 《Analytical and bioanalytical chemistry》2013,405(7):2163-2173
Multidimensional high-performance liquid chromatography (HPLC) is a key method in shotgun proteomics approaches for analyzing highly complex protein mixtures by complementary chromatographic separation principles. Here, we describe an integrated 3D-nano-HPLC/nano-electrospray ionization quadrupole time-of-flight mass spectrometry system that allows an enzymatic digestion of proteins followed by an enrichment and subsequent separation of the created peptide mixtures. The online 3D-nano-HPLC system is composed of a monolithic trypsin reactor in the first dimension, a monolithic affinity column with immobilized monomeric avidin in the second dimension, and a reversed phase C18 HPLC-Chip in the third dimension that is coupled to a nano-ESI-Q-TOF mass spectrometer. The 3D-LC/MS setup is exemplified for the identification of biotinylated proteins from a simple protein mixture. Additionally, we describe an online 2D-nano-HPLC/nano-ESI-LTQ-Orbitrap-MS/MS setup for the enrichment, separation, and identification of cross-linked, biotinylated species from chemical cross-linking of cytochrome c and a calmodulin/peptide complex using a novel trifunctional cross-linker with two amine-reactive groups and a biotin label. Figure
Schematic representations of the online 3D-nano-HPLC/nano-ESI-Q-TOF-MS/MS setup; LP loading pump, NP nano-pump 相似文献