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BITS Pilani Institutional Repository: Recent submissions

Now showing items 2461-2480 of 18787

Chlorine Abstraction Reactions of Fluorine: Part 2.—The Kinetic Determination of the Bond Dissociation Energy Di (CC12F—Cl)

Foon, Ruby; Tait, K. B. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (1), 1972)

The reaction of fluorine with CCl3F has been studied over the temperature range 491–586 K. The mechanism is identical to that found in Pyrex vessels except that the reaction is now a homogeneous gas phase one. The rate ...
Photochemistry of Anhydrides: Part 2.—Photolysis of Perfluoropropionic Anhydride : A New Source of C2F5 Radicals

Chamberlain, G. A.; Whittle, E. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (1), 1972)

The photolysis of the vapour of (C2F5CO)2O in the temperature range 20–213°C is described quantitatively by the overall reaction (C2F5CO)2O +hν→ CO + CO2+ n-C4F10, with the effective primary process being (C2F5CO)2O +hν→ ...
Kinetics of the Reaction Between HBr and C2F5Br Determination of the Bond Dissociation Energy Z>(C2F5—Br)

Ferguson, K. C.; Whittle, E. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

The kinetics of the overall thermal reaction between HBr and C2F5Br, HBr + C2F5Br ⇌ Br2+ C2F5H (3, –3) were studied in the range 365–516°C. Reactions involved are Br + Br + M ⇌ Br2+ M kc, Br + C2F5Br ⇌ Br2+ C2F5(4, –4), ...
Photochemistry of Anhydrides: Part 1.—Photolysis of Perfluoroacetic Anhydride Vapour: A New Source of CF3 Radicals

Chamberlain, G. A.; Whittle, E. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (1), 1972)

The photolysis of perfluoroacetic anhydride was studied in the temperature range 19–177°C using wavelengths in the range 254–265 nm. The photolysis is exceptionally simple and is quantitatively described by the reactions ...
Kinetics of the Reaction Between HBr and CFjBr Determination of the Bond Dissociation Energy D(CF3—Br) By K.

Ferguson, K C; Whittle, E (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

The kinetics of the overall thermal reaction CF3Br + HBr → CF3H + Br2(5) were studied in the range 368–537°C. Reactions involved are Br + Br + M ⇌ Br2+ M Kc, Br + CF3Br ⇌ Br2+ CF3(6, –6), CF3+ HBr → CF3H + Br. (7) The rate ...
Ion Exchange Involving Several Groups of Homogeneous Sites

Barrer, R. M.; Klinowski, J. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (1), 1972)

Crystalline exchangers such as zeolites may contain more than one group of different exchange sites. The theoretical basis of these multi-site exchangers has therefore been examined. Overall exchange isotherms and selectivities ...
Solubility of p-Nitroaniline and the Basic Strength of Aqueous Alcohols (and other Oxygen-Containing Compounds)

Sierra, Jose; Teixido M, Emilio (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

The solubility at 25°C of p-nitroanilinc in aqueous alcohols at concentrations of up to 40 % v/v is reported and activity coefficients arc calculated. The rate of increase of the indicator solubility with alcohol concentration ...
Field Emission Study of the Formation and Desorption of Oxide Layers on Tungsten Surfaces

Goymour, Clarence G.; King, David A. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

The interaction of oxygen with tungsten has been re-examined in the field emission microscope (FEM) as a sequel to a detailed temperature-programmed flash-desorption study of the kinetics of adsorption and desorption in ...
Interaction of Hydrogen Chloride with Evaporated Metal Films: Part 1. Chlorination of Iron, Nickel, Palladium, Silver and Lead

Dadiza, Y. M.; Saleh, J. M. (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

The interaction of HCl with evaporated metal films of iron, nickel, palladium, silver and lead has been investigated in the temperature range from –78°C to about 250°C. At –78°C, dissociative adsorption of HCl occurred on ...
Flame-Photometric Determination of the Standard Enthalpies of Formation of Al(0H)2 and AIO

Jensen, D E; Jones, G A (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (2), 1972)

Spectrophotometric studies have been made of gas-phase aluminium-containing species in fuel-rich premixed laminar atmospheric-pressure H2+ N2+ O2 flames to which this metal is added. The principal compound formed by Al ...
Dynamical behaviour of tuberculosis transmission

Das, Dhiraj Kumar (Biomath Communications, 2018)

Tuberculosis(TB) is a contagious disease in human caused by infection withВ Mycobacterium tuberculosis(Mtb). Most infections results a clinically asymptotic state termed as latent TB infection(LTBI) whereas a smaller portion ...
Dynamics of tuberculosis transmission with exogenous reinfections and endogenous reactivation

Das, Dhiraj Kumar (Elsevier, 2018-05)

We propose and analyze a mathematical model for tuberculosis (TB) transmission to study the role of exogenous reinfection and endogenous reactivation. The model exhibits two equilibria: a disease free and an endemic ...
Influence of multiple re-infections in tuberculosis transmission dynamics: A Mathematical Approach

Das, Dhiraj Kumar (IEEE, 2019)

This investigation accounts a TB transmission model with the possibility of both exogenous re-infections and recurrent TB. The qualitative characteristic of the model system has been analyzed covering stability of existing ...
Transmission dynamics of tuberculosis with multiple re-infections

Das, Dhiraj Kumar (Elsevier, 2020-01)

We propose and analyze an epidemic model describing the transmission dynamics of tuberculosis (TB) with the possibilities of re-infections and fast progression of the disease. The qualitative behavior of the system is ...
The impact of the media awareness and optimal strategy on the prevalence of tuberculosis

Das, Dhiraj Kumar (Elsevier, 2020-02)

In this present study, we propose and analyze a mathematical model of tuberculosis (TB) transmission considering social awareness effects during an epidemic. Possible equilibrium points of the model are investigated, and ...
Dynamical analysis of an age-structured tuberculosis mathematical model with LTBI detectivity

Das, Dhiraj Kumar (Elsevier, 2020-12)

The age-dependent heterogeneity observed in tuberculosis (TB) epidemiology includes susceptibility, infectiousness, contact preferences of an individual. Also, the chance of finding a direct route to infectious pulmonary ...
Global dynamics of a tuberculosis model with sensitivity of the smear microscopy

Das, Dhiraj Kumar (Elsevier, 2021-05)

Sputum smear microscopy and chest X-ray are the key TB diagnosis methods available in resource-constrained health settings of many developing countries worldwide. The test has moderate sensitivity towards the detection of ...
Dynamical behaviour of infected predator–prey eco-epidemics with harvesting effort

Das, Dhiraj Kumar (Springer, 2021-04)

This investigation accounts for a predator–prey system where the predator community is affected by infectious disease and also subjected to harvest. The model considers the behavioural change in susceptible predators due ...
Optimal control strategy for adherence to different treatment regimen in various stages of tuberculosis infection

Das, Dhiraj Kumar (EPJ Plus, 2021-08)

In this article, we propose a new mathematical model for tuberculosis considering the infectivity of both smear-positive and smear-negative individuals, searching for an efficient control strategy that may be followed to ...
The effectiveness of contact tracing in mitigating COVID-19 outbreak: A model-based analysis in the context of India

Das, Dhiraj Kumar (Elsevier, 2021-09)

The ongoing pandemic situation due to COVID-19 originated from the Wuhan city, China affects the world in an unprecedented scale. Unavailability of totally effective vaccination and proper treatment regimen forces to employ ...

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