Few techniques of stability analysis for infectious disease employ the compartmental model

The cycle of life includes everything from joy to sorrow to good health to sickness. Most people have had a viral infection at some point in their lives, whether it was a small infections or the flu. It is amazing that a microscopic particle that cannot even be seen under a microscope and cannot even replicate on its own can enter any living creature and use the resources of that life form to create thousands of copies of the virus, some of which can even be fatal to the living species. Understanding the origin, means of prevention, means of control, and attempts at preventative measures are essential in the fight against these illnesses. It is immoral to experiment on infectious diseases, unlike other types of research. On the other hand, mathematical models can reasonably explain how the disease is spreading. This article focuses on few compartmental models and a technique to analyze the infectious disease. The control analysis technique which employ to comprehend how diseases move among the populations and where the controls are required. In this article Routh-Hurwitz criterion is employed to analyze the system of equations

Dynamical properties of a modified chaotic Colpitts oscillator with triangular wave non-linearity

The purpose of this paper is to introduce a new chaotic oscillator. Although different chaotic systems have been formulated by earlier researchers, only a few chaotic systems exhibit chaotic behaviour. In this work, a new chaotic system with chaotic attractor is introduced for triangular wave non-linearity. It is worth noting that this striking phenomenon rarely occurs in respect of chaotic systems. The system proposed in this paper has been realized with numerical simulation. The results emanating from the numerical simulation indicate the feasibility of the proposed chaotic system. More over, chaos control, stability, diffusion and synchronization of such a system have been dealt with

Metal-bis(oxazoline) complexes: From coordination chemistry to asymmetric catalysis

Metal-bis(oxazoline) complexes have proven to be one of the most versatile classes of chiral catalysts being able to promote a large variety of organic transformations. The coordination geometry and electronic properties play an integral role for the asymmetric induction exhibited by these complexes and, aided by X-ray structure analysis and NMR studies, rules have been recognized to understand their function. Based on the most common complex geometries observed, i.e. tri, tetra- (tetrahedral or square-planar), penta- (trigonal-bipyramidal or square-pyramidal), or hexacoordination (octahedral) a mechanistic picture has emerged that allows control of enantioselectivity in reactions in a highly predictable and tunable way, demonstrating the power of combining the knowledge of coordination chemistry and asymmetric catalysis. (c) 2007 Elsevier B.V. All rights reserved

Adsorption of Crystal Violet Dye from Aqueous Solution Using Ricinus Communis Pericarp Carbon as an Adsorbent

Carbon prepared from Ricinus Communis Pericarp (RCP) was used to remove a crystal violet dye from aqueous solution by an adsorption technique under varying conditions of agitation time, dye concentration, adsorbent dose and pH. Adsorption is influenced by pH, dye concentration, carbon concentration and contact time. Equilibrium was attained with in 60 min. Adsorption followed both Langmuir and Freundlich isotherm models. The adsorption capacity was found to be 48.0 mg/g at an initial pH of 6.8±0.2 for the particle size of 125–250 μm

Synthesis and application of phosphorus dendrimer immobilized azabis(oxazolines)

Phosphorus dendrimer immobilized azabis(oxazoline) ligands can be efficiently synthesized up to the third generation with 48 ligand molecules being attached to the periphery using click chemistry. The so-assembled macromolecules were evaluated in copper(II)-catalyzed asymmetric benzoylations, showing good yields and enantioselectivities. Moreover, the copper(II)-catalysts could be readily recovered and reused in several cycles. The globular structure of the dendritic ligands seems to prevent interference of the triazole moieties in the catalysis, contrasting MeOPEG or polystyrene bound ligands of the same type

Stereospecific conversion of alcohols into pinacol boronic esters using lithiation–borylation methodology with pinacolborane

The synthesis of primary and secondary pinacol boronic esters via lithiation–borylation of carbamates and benzoates with pinacolborane is described. This new protocol enables the highly selective synthesis of enantioenriched and geometrically defined boronic esters that cannot otherwise be accessed by alternative methodologies

Research data supporting: Iterative reactions of transient boronic acids enable sequential C-C bond formation

NMR filesThis record supports 'Iterative reactions of transient boronic acids enable sequential C-C bond formation', which has been published in Nature Chemistry.This work was supported by the EPSRC [grant numbers EP/K009494/1 and EP/M004120/1]