نتایج جستجو برای: structural enhancement

تعداد نتایج: 518161  

2012
Alexander Wong Sepideh Hariri Eun Sun Song Kostadinka Bizheva

A novel optical coherence tomography (OCT) reconstruction approach is introduced for improved visualization of inner-retina capillaries in retinal OCT tomograms. The proposed method utilizes a minimization framework based on a tensor total variation (TTV) energy functional, to enforce capillary structural characteristics in the spatial domain. By accounting for structure tensor characteristics,...

2015
Min Li Xufei Sun Xiguo Xie Yun Shao Yongkai Deng Chengyin Wu Qihuang Gong Yunquan Liu

Photoelectrons ionized from atoms and molecules in a strong laser field are either emitted directly or rescattered by the nucleus, both of which can serve as efficiently useful tools for molecular orbital imaging. We measure the photoelectron angular distributions of molecules (N2, O2 and CO2) ionized by infrared laser pulses (1320 nm, 0.2 ~ 1 × 10(14) W/cm(2)) from multiphoton to tunneling reg...

2011
Tim Gruene Min-Kyu Cho Irina Karyagina Hai-Young Kim Christian Grosse Karin Giller Markus Zweckstetter Stefan Becker

Long-range structural information derived from paramagnetic relaxation enhancement observed in the presence of a paramagnetic nitroxide radical is highly useful for structural characterization of globular, modular and intrinsically disordered proteins, as well as protein-protein and protein-DNA complexes. Here we characterized the conformation of a spin-label attached to the homodimeric protein...

Journal: :The Journal of Experimental Medicine 1967
Leonard D. Berman

The existence of a virus-induced, virus-specific transplantation, antigen in adenovirus 12-induced CBA mouse tumors was demonstrated. The antigen is virus-specific, but not related to structural virion or T antigens. It is a weak antigen, and required immunization with whole, infectious adenovirus 12 to produce considerable immunity. Comparable immunity could not be achieved with homologous cel...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Min Zhang Yuqing Wu

The effects of elevated hydrostatic pressure on four representative proteins, lysozyme, human serum albumin, ubiquitin and RNase A, were investigated by using Fourier transform infrared (FTIR) spectroscopy, by principal component analysis (PCA) and by moving-window two-dimensional (MW2D) correlation analysis. In addition, we revealed the pressure-induced changes of secondary structure elements...

Journal: :تحقیقات مالی اسلامی 0
محمد توحیدی دانشجوی مقطع دکتری رشته مدیریت مالی دانشگاه امام صادق(ع) و کارشناس مدیریت پژوهش، توسعه و مطالعات اسلامی سازمان بورس و اوراق بهادار

credit enhancements are methods that are used in structured finance for promoting the credit quality of financial instruments. one of the most important mechanisms for improving the credit quality is tranching financial instruments. this mechanism is mentioned as a structural and internal credit enhancement. tranching decreases financing costs and improves the quality of financial instruments. ...

Journal: :Ultrasound in medicine & biology 1977
R F Heimburger F J Fry T D Franklin N T Sanghvi G Gardner J Muller

-This study demonstrated techniques for visualization of detailed brain anatomy with two dimensional ultrasound. The use of large aperture focused ultrasound transceivers appears to be essential for displaying the outlines of thalamus, internal capsule and substantial nigra in addition to those of the ventricles. The ability to vary grey scale and edge enhancement using either linear or logarit...

2013
Christoph H. Wunderlich Roland G. Huber Romana Spitzer Klaus R. Liedl Karin Kloiber Christoph Kreutz

In this work, we present a novel 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) radical phosphoramidite building block, which can be attached to the 5'-terminus of nucleic acids. To investigate the paramagnetic relaxation enhancement (PRE) emanating from this radical center, we incorporated the TEMPO label into various types of RNAs. We measured proton PREs for selectively (13)C-isotope labeled n...

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