this paper considers a class of one-dimensional solidification problem in which kinetic undercooling is incorporated into the temperature condition at the interface. a model problem with nonlinear kinetic law is considered. the main result is an existence theorem. the mathematical effects of the kinetic term are discussed

the kinetic of photo oxidative decolorization of c.i. acid yellow 23 (ay23) was investigated in uv/ process. the semi-logarithmic of the concentrations of ay23 versus irradiation time were linear, suggesting pseudo-first order reaction. a simple kinetic model is proposed which confirms pseudo- first order reaction. the results indicate that the apparent reaction rate constant is a function of l...

phenol and its homologues are aromatics containing hydroxyl, methyl, amide and sulphonic groups attached to the benzene ring. these molecules are both anthropogenic and xenobiotics. phenols are environmental pollutants discharged through wastewaters from various industries. phenols are toxic to several biochemical reactions. however biological transformation of phenols to non-toxic entities exi...

in this work, styrene removal from wastewater by using sugarcane waste (bagasse) as an adsorbent was studied. equilibrium isotherms and kinetics were determined; the effects of bagasse particle size and concentration, solutions ph, and temperature on the biosorption of styrene were studied in batch experiments. adsorption equilibrium data was successfully fitted to langmuir isotherms (r2=0.986)...

Resume Objectifs La formation en hypnose clinique a pour consequence des transformations importantes chez les soignants, dans leurs pratiques professionnelles mais aussi leur vie personnelle. L’objectif de cette etude etait d’explorer l’experience associees professionnels sante. Methodes methode qualitative utilisee l’Interpretative Phenomenological Analysis. Des entretiens semi-structures ont ...

PT. Lingga Harapan Jambi is a company engaged in bottled drinking water. produces two well-known brands, namely Arthess and Citra which have been labeled Halal MUI registered with SNI BPOM. The research methodology used is, the uses design using descriptive methods quantitative methodes. population this study community Tanjung Pinang Village, Timur, based on survey results it known that number ...

kinetic parameters of the ammonolysis reaction of dichloroethane in nonaqueous media are studied and the optimum reaction conditions are reported. a suitable reactor for running the reaction under high pressure in the range of 50 to 500 °c is designed. kinetic behaviours of the system is studied and other reaction parameters such as rate constant, kinetic order, and activation energy are determ...

en pedagogic, le souci d'cvaluer correctcment les formes a fait l'objet des debats tres anciens. les contestations vivcs se poursuivent encore 3 cause de )'importance du sujet. l'evaluation permct au professeur de contrdler et de detectcr les eventuelles insuffisances de son enseignement. des notes precises soot donnees a partir des criteres. l'cvaluation se sert des pr...

In three dimensional polyhedral domains with a Lipschitz continuons boundary, we denve the //(curl , Q ) and //(curl, div , Q ) var lattonal formulations for the Darwin model of approximation to Maxwell's équations and prove the well-posedness of the variational Systems Then Nedelec s and Standard fini te element methods are used io solve two kinds of variational ptoblems Though symmetrie bilin...