Probabilistic signatures of spatiotemporal intermittency in the coupled sine circle map lattice

The phase diagram of the coupled sine circle map system exhibits a variety of interesting phenomena including spreading regions with spatiotemporal intermittency, non-spreading regions with spatial intermittency, and coherent structures termed solitons. A spreading to non-spreading transition is seen in the system. A cellular automaton version of the coupled system maps the spreading to non-spreading transition to a transition from a probabilistic to a deterministic cellular automaton. The solitonic sector of the system shows spatiotemporal intermittency with soliton creation, propagation and absorption. A probabilistic cellular automaton mapping is set up for this sector which can identify each one of these phenomena.      

Coordination chemistry of Schiff base tin complexes

The most important results of extensive studies of tin metal complexes with Schiff base ligands are reviewed. A large number of inorganic compounds are known but still there is a need of new compounds to develop various efforts in different fields for biomedical applications.     

Proteomic approach for purification of seminal plasma proteins involved in tumor proliferation

Human seminal plasma contains a large array of proteins required for the normal physiology and metabolism of spermatozoa. These are mainly secreted from prostate epithelium, testes, and seminal vesicles. Fortunately, many of these are found to be present at elevated concentration in seminal plasma and act as a biomarker of different carcinomas as their levels are also enhanced in serum and are found to be involved in tumor progression and metastasis apart from fertility. The proteins which were overexpressed in the seminal plasma of prostate carcinoma patients were identified by 2-DE and MALDI-TOF/MS. We have designed a strategy to purify these four proteins prostate specific antigen (PSA), prostatic acid phosphatase (PAP), Zinc alpha2-glycoprotein (ZAG), and progastricsin (PG), together in homogeneity by using simple chromatographic techniques. Acidic and basic fractions of human seminal plasma were separated by ion exchange chromatography and further purified by gel permeation chromatography. Our results form a new and valuable resource for those attempting structure-based drug designing for prostate and other cancers where the amount of proteins is required in plenty and in native form.     

SnO2 Quantum Dots Distributed along V2O5 Nanobelts for Utilization as a High-Capacity Storage Hybrid Material in Li-Ion Batteries

In this study, the facile synthesis of SnO₂ quantum dot (QD)-garnished V₂O₅ nanobelts exhibiting significantly enhanced reversible capacity and outstanding cyclic stability for Li⁺ storage was achieved. Electrochemical impedance analysis revealed strong charge transfer kinetics related to that of V₂O₅ nanobelts. The SnO₂ QD-garnished V₂O₅ nanobelts exhibited the highest discharge capacity of ca. 760 mAhg⁻¹ at a density of 441 mAg⁻¹ between the voltage ranges of 0.0 to 3.0 V, while the pristine V₂O₅ nanobelts samples recorded a discharge capacity of ca. 403 mAhg⁻¹. The high capacity of QD-garnished nanobelts was achieved as an outcome of their huge surface area of 50.49 m²g⁻¹ and improved electronic conductivity. Therefore, the as-presented SnO₂ QD-garnished V₂O₅ nanobelts synthesis strategy could produce an ideal material for application in high-performance Li-ion batteries.     

Microtransitions in a 2 − d load bearing hierarchical network

We identify the existence of microtransitions in the process of avalanche transmission on $2?d$ load bearing hierarchical networks. It has been seen in earlier work that typical realizations of this network exhibit a second order transition, whereas the critical realization of the network, shows a first order transition. The microtransitions can be used to predict the transition point for both cases. Microtransitions are also seen in the correlation function and scale in a similar way for the critical realisation. We compare the ratios of the peaks of the Fourier spectrum of the correlation function with the structure factor of the network to infer information about the network structure.     

Binuclear complexes with uranyl ions in non-equivalent coordination environments – 2. Synthesis and electrochemistry of the complexes with binucleating aroyl hydrazones and 1,10-phenanthroline

The ternary binuclear complexes, [(UO₂phen)₂L^1–5](NO₃) _n · S (1–3): n = 1; (4, 5): n = 2; S = solvent {H₃L^1–3 = 1-(2-hydroxybenzoyl)-2-(2-hydroxybenzal/2-hydroxy-3-methoxybenzal/2-hydroxynaphthal)hydrazine; H₂L^4,5 = 1-(2-aminobenzoyl)-2-(2-hydroxybenzal/2-hydroxy-3-methoxybenzal)hydrazine; phen = 1,10-phenanthroline} have been prepared and characterised, and their spectral and electrochemical properties studied. Complexes (4, 5) possess longer O=U=O bonds than those in complexes (1–3) as a result of the strong -donating phenolate group being replaced by an amino group. The i.r. spectra and electrochemical behaviour confirm the electronic non-equivalence of the coordination environments around the two uranyl ions in these complexes.     

Substitution of 2-phosphaindolizines by bromine and by chlorophosphines

Bromine does not add to phosphorus in a 2-phosphaindolizine 1 but substitutes its 1-position. The 1-bromo derivatives 2 are best prepared with Br₂/NEt₃ or N-bromosuccinimide. Their hydrolysis is remarkable; it involves a debromination of C-1, an oxidation of P and a selective opening of the P/C-3 bond. PCl₃ also causes a substitution of the 1-position. The resulting 1-dichlorophosphino derivatives 5 easily undergo a substituent exchange at the exocyclic phosphorus. More 1-phosphino derivatives are formed in the reaction of 1 with phenyl and diazaphospholyl dichlorophosphine.     

Experimental and theoretical examinations of n→σ* negative hyperconjugation in pyridinium dichlorophosphinomethylide

An X-ray crystal structure investigation as well as theoretical DFT (hybrid B3LYP/6-31G** level) calculations of 2-ethylpyridinium dichlorophosphino-ethoxycarbonylmethylide confirm the existence of significant n→σ* negative (anionic) hyperconjugation between the ylidic charge and the σ*_P-Cl bond in the most stable conformer, which has the phosphorus lone pair oriented orthogonally to the ylidic p_z orbital, resulting in elongation of the P-Cl bond parallel to the p_z orbital but shortening of the C-P bond.     

Phonon dispersion in thorium: A pseudopotential approach

A one parameter model pseudopotential is used in investigating the phonon dispersion in thorium. A very good agreement has been obtained between theory and experiment, especially, in transverse branches. This is attributed to the removal of the discontinuity in the pseudopotential in r-space.