Combined study of X-ray reflectivity and atomic force microscopy on a surface-grafted phospholipid monolayer on a solid

We investigated the detailed structure of a surface-grafted phospholipid monolayer, which was polymerized in situ onto a methacryloyl-silanized solid surface. By the combined study of X-ray reflectivity and atomic force microscopy, the in situ polymerization step of the lipid molecules are sufficiently detailed to reveal the molecular structure of lipid molecules before and after in situ polymerization. From the data of the X-ray reflectivity, we confirmed that the in situ polymerization process produces a flat lipid monolayer structure and that the lipid monolayer is substantially grafted on a silanized surface by chemical bonding. After the polymerization and washing processes, the thickness of the head group was 9 angstroms and the thickness of the tail group was 21 angstroms. The surface morphology of the polymerized phospholipid monolayer obtained by the measurements of atomic force microscopy was consistent with the results of the X-ray reflectivity. The cross-sectional analysis shows that the surface coverage of lipid molecules, which are chemically grafted onto a silanized surface, is approximately 89%.     

Soft tissue differentiation using multiband signatures of high resolution ultrasonic transmission tomography

In this paper, we are interested in soft tissue differentiation by multiband images obtained from the High-Resolution Ultrasonic Transmission Tomography (HUTT) system using a spectral target detection method based on constrained energy minimization (CEM). We have developed a new tissue differentiation method (called "CEM filter bank") consisting of multiple CEM filters specially designed for detecting multiple types of tissues. Statistical inference on the output of the CEM filter bank is used to make a decision based on the maximum statistical significance rather than the magnitude of each CEM filter output. We test and validate this method through three-dimensional interphantom/intraphantom soft tissue classification where target profiles obtained from an arbitrary single slice are used for differentiation over multiple other tomographic slices. The performance of the proposed classifier is assessed using receiver operating characteristic analysis. We also apply our method to classify tiny structures inside a bovine kidney and sheep kidneys. Using the proposed method we can detect physical objects and biological tissues such as styrofoam balls, chicken tissue, calyces, and vessel-duct successfully.     

10 Gb/s Linear Full-Rate CMOS Phase Detector for Clock Data Recovery Circuit

An improved linear full-rate CMOS 10 Gb/s phase detector is proposed. The improved phase detector overcomes the difficulties in realizing the full-rate operation by adding an I/Q splitter for the input data. Such a topology enlarges the pulse width of output signals to ease the full clock rate operation and the problem of the half period skew in the whole clock data recovery system. The proposed topology is able to provide a good linearity over a wider operating range of input phase offset compared to that of existing designs. The phase detector using the Chartered 0.18 μ m CMOS process is capable of operating up to a 10 GHz clock rate and 10 Gb/s input data for a 1.8 V supply voltage with 31 mW power consumption.     

Synthesis of monodisperse chromium nanoparticles from the thermolysis of a Fischer carbene complex

We successfully synthesized monodisperse chromium nanoparticles from the thermolysis of a Fischer carbene complex.     

Design, self-assembly, and photophysical properties of pentameric metallomacrocycles: [M5(N-hexyl[1,2-bis(2,2':6',2''-terpyridin-4-yl)]carbazole)5][M = Fe(II), Ru(II), and Zn(II)

A novel family of metallopentacycles was constructed by the facile self-assembly of a bis(terpyridine)-carbazole monomer utilizing terpyridine-metal(II)-terpyridine connectivity; its photophysical properties were investigated.     

Sur les égalités du miroir et certaines formes faibles de la conjecture de Greenberg

Let p be an odd prime. For any CM number field K containing a primitive p^th-root of unity, class field theory and Kummer theory put together yield the well known reflection inequality ^+– between the plus and minus parts of the -invariant of K. Greenbergs conjecture asserts that ⁺ is always trivial. We study here a weak form of this conjecture, namely ⁺=^– if and only if ⁺=^–=0.     

p(↑)+p(↑) → π+d at 515 and 578 MeV

The polarization asymmetries A_0y and A_y0, and the spin correlation parameter A_yy have been measured at SIN at 515 and 578 MeV using a transversally polarized proton beam and target. The results are compared with various theoretical models.     

Resonance fluorescence of gaseous chlorine excited with a single longitudinal mode argon ion laser

Resonance fluorescence spectra of gaseous chlorine, excited with a high power single longitudinal mode argon ion laser which was tuned through the lasing profiles of the 4880-, 4965-, 5017-, and 5145-Å lines, were studied. Five progressions of fluorescence lines were found and assigned as the fluorescence of ³⁵Cl³⁵Cl and ³⁷Cl³⁷Cl isotopic molecules resonantly excited from v = 0 and 1 levels of the X¹Σ state to the B³Π state. The fluorescence line positions agreed with those of the theoretical calculation within 0.2 cm^?1. The fluorescence intensities were very weak due to the extremely small transition probability between the B³Π and the X¹Σ states.     

Parity violation in electron-deuteron scattering I. Methodology and elastic scattering

In this paper, we present methodology for investigating theoretically parity violation in both the elastic and break-up channels of electron-deuteron scattering, restricting ourselves to energies in which non-relativistic expansions are allowed for nucleons. The deficiency in the standard impulse approximation related to gauge invariance is remedied by relating it to the “elementary-particle” treatment. Results for parity violation in elastic electrondeuteron scattering are presented and discussed.