Pyroglutamic acid: a unique chiral synthon

1. Download : Download full-size image

     

Fabrication and photoresponse of n-$$\hbox {WS}_{2}/$$p-V$$_{0.25}$$0.25W$$_{0.75}$$0.75Se$$_{2}$$2 van der Waals heterojunction

Excitation functions for \(\alpha \)-induced reactions on natural vanadium were measured in the energy range up to 20 MeV. The stacked-foil activation technique was used. The experimental results were compared with the theoretical calculations using EMPIRE-3.1, EMPIRE-3.2.2 and TENDL 2015, and with earlier experimental results. Thick target yields were calculated for the production of \(^{54}\hbox {Mn}\) and for the associated impurity \(^{52}\hbox {Mn}\).     

Projected Shell Model Description of Positive Parity Band of <Superscript>130</Superscript>Pr Nucleus

Theoretical investigation of positive parity yrast band of odd-odd ¹³⁰Pr nucleus is performed by applying the projected shell model. The present study is undertaken to investigate and verify the very recently observed side band in ¹³⁰Pr theoretically in terms of quasi-particle (qp) configuration. From the analysis of band diagram, the yrast as well as side band are found to arise from two-qp configuration πh _11/2???νh _11/2. The present calculations are viewed to have qualitatively reproduced the known experimental data for yrast states, transition energies, and B(M1) / B(E2) ratios of this nucleus. The recently observed positive parity side band is also reproduced by the present calculations. The energy states of the side band are predicted up to spin 25⁺, which is far above the known experimental spin of 18⁺ and this could serve as a motivational factor for future experiments. In addition, the reduced transition probability B(E2) for interband transitions has also been calculated for the first time in projected shell model, which would serve as an encouragement for other research groups in the future.     

Measurement-only topological quantum computation

We remove the need to physically transport computational anyons around each other from the implementation of computational gates in topological quantum computing. By using an anyonic analog of quantum state teleportation, we show how the braiding transformations used to generate computational gates may be produced through a series of topological charge measurements.     

Combined Raman spectroscopy and optical coherence tomography device for tissue characterization

We report a dual-modal device capable of sequential acquisition of Raman spectroscopy (RS) and optical coherence tomography (OCT) along a common optical axis. The device enhances application of both RS and OCT by precisely guiding RS acquisition with OCT images while also compensating for the lack of molecular specificity in OCT with the biochemical specificity of RS. We characterize the system performance and demonstrate the capability to identify structurally ambiguous features within an OCT image with RS in a scattering phantom, guide acquisition of RS from a localized malignancy in ex vivo breast tissue, and perform in vivo tissue analysis of a scab.     

Arrowroot + NaI: a low-cost,fast ion conducting eco-friendly polymer electrolyte system

Ionics - Energy devices are the lifeline of today’s society, and hence, they are produced in large number resulting in tremendous increase of chemical garbage. Hence, the scientific community...     

Synthesis and characterization of dioxomolybdenum complexes of semicarbazones

Summary Six-coordinate dioxomolybdenum(VI) complexes of the type [MoO₂(SCZ)₂] (HSCZ=semicarbazone) were prepared and characterized by elemental analyses, molecular weight determinations and conductance and magnetic measurements. On the basis of electronic, i.r., proton magnetic resonance, and¹³C nuclear magnetic resonance spectral studies, an octahedral geometry withcis-MoO₂ is proposed.     

Schiff base complexes derived from trichlorooxovanadium(V)

Summary The synthesis, characterization and geometrical features of penta- and hexa-coordinated oxovanadium(V) complexes, [(VOCl₂)(SB)] and [(VOCl)(SB)₂] (where SBH represents a monobasic Schiff base) are described. The isolated products are coloured, crystalline monomeric solids, which are nonelectrolytes. On the basis of spectral (i.r.,¹H n.m.r. and u.v.) and magnetic susceptibility measurements distorted trigonal bipyramidal and octahedral geometries are proposed for [(VOCl₂)(SB)] and for the [(VOCl)(SB)₂] type complexes, respectively.     

K-absorption spectral investigations on some dimeric copper(II) carboxylate complexes

The X-ray K-absorption edge position and the extended fine structure of copper in some copper(II) carboxylate complexes involving metal-metal exchange interaction have been investigated using a 40 cm bentcrystal spectrograph. It has been found that the edge position in these complexes shifts towards the higher energy side as the pK_a value of the corresponding acids increases. Sharp and narrow main peaks have been observed in all these complexes except the monomeric complex, copper(II) trichloroacetate. Estimates of metal-ligand average bond distances have also been made.