Density functional approach for modeling CO2 pressurized polymer thin films in equilibrium.

We have used polymer density functional theory to analyze the equilibrium density profiles and interfacial properties of thin films of polymer in the presence of CO(2). Surface tension, surface excess adsorption of CO(2) on polymer surface, and width of the interface are discussed. We have shown the changes in these properties in the presence of CO(2) and with increasing film thickness and their inverse linear relationship with increasing chain length. One of our important findings is the evidence of segregation of end segments toward the interface. We have introduced a new method of representing this phenomenon by means of Delta profiles that show increase in segregation owing to the presence of CO(2) and with increasing chain length. We also make predictions for the octacosane-CO(2) binary system near the critical point of CO(2). Our results indicate qualitative trends that are comparable to the similar experimental and simulation studies.

Design, synthesis, and evaluation of nonaqueous silylamines for efficient CO2 capture.

A series of silylated amines have been synthesized for use as reversible ionic liquids in the application of post-combustion carbon capture. We describe a molecular design process aimed at influencing industrially relevant carbon capture properties, such as viscosity, temperature of reversal, and enthalpy of regeneration, while maximizing the overall CO2 -capture capacity. A strong structure-property relationship among the silylamines is demonstrated in which minor structural modifications lead to significant changes in the bulk properties of the reversible ionic liquid formed from reaction with CO2 .

The synthesis and the chemical and physical properties of non-aqueous silylamine solvents for carbon dioxide capture.

Silylamine reversible ionic liquids were designed to achieve specific physical properties in order to address effective CO2 capture. The reversible ionic liquid systems reported herein represent a class of switchable solvents where a relatively non-polar silylamine (molecular liquid) is reversibly transformed to a reversible ionic liquid (RevIL) by reaction with CO2 (chemisorption). The RevILs can further capture additional CO2 through physical absorption (physisorption). The effects of changes in structure on (1) the CO2 capture capacity (chemisorption and physisorption), (2) the viscosity of the solvent systems at partial and total conversion to the ionic liquid state, (3) the energy required for reversing the CO2 capture process, and (4) the ability to recycle the solvents systems are reported.

Hepatic trauma management and outcome; Our experience.

BACKGROUND: Injuries to the liver have been reported in 35-45% of patients with significant blunt abdominal trauma. Since the introduction of ultrasonography and computerized tomography in the evaluation of these patients, there has been an increase in number of hepatic injuries diagnosed that previously would not have been apparent. AIMS AND OBJECTIVES: The purpose of this study was to determine the epidemiology and pattern of isolated liver injury, significant factors related to management and outcome. MATERIAL AND METHOD: A retrospective study of 50 cases of isolated Hepatic trauma admitted and managed over span of last three years (June 2006-June 2009) at MGM Medical College, Navi Mumbai. OBSERVATION: Out of 50 Patients of isolated liver injury, 36 (72%) were managed conservatively. 14(28%) Patients with refractory hypotension and hemoperitoneum were operated in emergency. The mortality of 3 (6%) cases was related to massive bleeding from liver parenchyma. CONCLUSION: The line of management of isolated liver trauma is primarily guided by the haemodynamic status of the patient at the time of presentation in emergency department and findings on ultrasonography [FAST] and computerized tomography. There is significant association of line of management with volume of hemoperitoneum and number of blood transfusion.