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排序方式: 共有157条查询结果,搜索用时 343 毫秒
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Garanin S. G. Dushina L. A. Elin I. P. Zhidkov N. V. Izgorodin V. M. Kalmykov N. A. Kovalenko V. P. Kravchenko A. G. Litvin D. N. Petrov S. I. Pozdnyakov E. V. Rogachev V. G. Starodubtsev K. V. Suslov N. A. Tachaev G. V. Chaunin A. E. 《Journal of Experimental and Theoretical Physics》2019,128(4):650-654
Journal of Experimental and Theoretical Physics - We report on the results of experiments performed on the Iskra-5 laser facility for studying the effect of the polydeuteroethylene (CD2)n working... 相似文献
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Borodin V. G. Vatulin V. V. Zhidkov N. V. Elin I. P. Komarov V. M. Karasev V. V. Koltsov V. V. Malinov V. A. Migel V. M. Popikov V. S. Rimsky-Korsakov A. A. Suslov N. A. Charukhchev A. V. 《Physics of Atomic Nuclei》2019,82(12):1706-1713
Physics of Atomic Nuclei - The possibility of observing the stimulated de-excitation of nuclear isomers (SDENI) in plasma (plasma lifetime ∼1.5 ps, temperature of electrons ∼ 10 keV)... 相似文献
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Xia J Siegel M Bergseng E Sollid LM Khosla C 《Journal of the American Chemical Society》2006,128(6):1859-1867
Human leukocyte antigen DQ2 is a class II major histocompatibility complex protein that plays a critical role in the pathogenesis of Celiac Sprue by binding to epitopes derived from dietary gluten and triggering the inflammatory response of disease-specific T cells. Inhibition of DQ2-mediated antigen presentation in the small intestinal mucosa of Celiac Sprue patients therefore represents a potentially attractive mode of therapy for this widespread but unmet medical need. Starting from a pro-inflammatory, proteolytically resistant, 33-residue peptide, LQLQPFPQPELPYPQPELPYPQPELPYPQPQPF, we embarked upon a systematic effort to dissect the relationships between peptide structure and DQ2 affinity and to translate these insights into prototypical DQ2 blocking agents. Three structural determinants within the first 20 residues of this 33-mer peptide, including a PQPELPYPQ epitope, its N-terminal flanking sequence, and a downstream Glu residue, were found to be important for DQ2 binding. Guided by the X-ray crystal structure of DQ2, the L11 and L18 residues in the truncated 20-mer analogue were replaced with sterically bulky groups so as to retain high DQ2 affinity but abrogate T cell recognition. A dimeric ligand, synthesized by regiospecific coupling of the 20-mer peptide with a bifunctional linker, was identified as an especially potent DQ2 binding agent. Two such ligands were able to attenuate the proliferation of disease-specific T cell lines in response to gluten antigens and, therefore, represent prototypical examples of pharmacologically suitable DQ2 blocking agents for the potential treatment of Celiac Sprue. 相似文献
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All-silica nanofluidic devices for DNA-analysis fabricated by imprint of sol-gel silica with silicon stamp 总被引:1,自引:0,他引:1
Mikkelsen MB Letailleur AA Søndergård E Barthel E Teisseire J Marie R Kristensen A 《Lab on a chip》2012,12(2):262-267
We present a simple and cheap method for fabrication of silica nanofluidic devices for single-molecule studies. By imprinting sol-gel materials with a multi-level stamp comprising micro- and nanofeatures, channels of different depth are produced in a single process step. Calcination of the imprinted hybrid sol-gel material produces purely inorganic silica, which has very low autofluorescence and can be fusion bonded to a glass lid. Compared to top-down processing of fused silica or silicon substrates, imprint of sol-gel silica enables fabrication of high-quality nanofluidic devices without expensive high-vacuum lithography and etching techniques. The applicability of the fabricated device for single-molecule studies is demonstrated by measuring the extension of DNA molecules of different lengths confined in the nanochannels. 相似文献
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Copper(II)-acid co-catalyzed intermolecular substitution of electron-rich aromatics with diazoesters
The intermolecular aromatic substitution of N,N-dialkylanilines and alkoxybenzenes with diazoesters is shown to proceed in the presence of catalytic amounts of both copper(II) salt and acid (Lewis or Brønsted). This method is a mild and rare metal-free C-C bond formation reaction between aromatic (sp2) and aliphatic (sp3) carbons. 相似文献