Chromatographic and densitometric method for determination of moxifloxacin in the presence of products of acidic hydrolysis was developed. The established method had suitable specificity, precision, good accuracy, and high sensitivity. In addition, stability of moxifloxacin in acidic solutions at temperature 90 degrees C and 110 degrees C in the presence and absence of metal ions, such as Cu(II...

The calculation of the structure of white dwarf and neutron stars is a suitable topic for an undergraduate thesis or an advanced special topics or independent study course. The subject is rich in many different areas of physics, ranging from thermodynamics to quantum statistics to nuclear physics to special and general relativity. The computations for solving the coupled structure differential ...

We analyze some models of nonequilibrium systems proposed in the past decade which derive the laws of Irreversible Thermodynamics from deterministic dynamics. We find that these models do not posses the crucial property of local thermodynamic equilibrium, since they represent noninteracting particles systems. Hence, these models are not suited for a derivation of Irreversible Thermodynamics. In...

What is the coherence of organisms? The organism is not a heat engine Energy storage in the living system-to equilibrate and not to equilibrate Energy storage over all space-time domains How is energy mobilized in living systems? The thermodynamics of symmetrically coupled flows The thermodynamics of cyclical flows Coupled energy flows are symmetrical and cyclical "Long-range energy continua" C...

beverage emulsions are systems that are composed of two liquids including oil and water which are prepared by homogenizing oil phase in an acidic aqueous phase. they must be stable in both concentrated and diluted form for a period of 6-12 months upon standing at room temperature. two immiscible phases contained systems are thermodynamically unsta-ble. in other words, they are vulnerable to bre...

The time evolution during which macroscopic systems reach thermodynamic equilibrium states proceeds as a continuous sequence of contact structure preserving transformations maximizing the entropy. This viewpoint of mesoscopic thermodynamics and dynamics provides a unified setting for the classical equilibrium and nonequilibrium thermodynamics, kinetic theory, and statistical mechanics. One of t...

The use of the Maxwell construction, in conjunction with the van der Waals equation of state, to represent the liquefaction of gases is familiar to all students of thermodynamics. The present paper is concerned with the application of the Maxwell construction to Fermi fluids, and in particular with the question as to whether or not they can undergo a liquid-gas phase transition at T= 0. We shal...

Thermodynamics is the old science that describes the flow of energy in systems with many atoms. Works started by Carnot, Kelvin and Clausius showed that these laws are very general. This universality led to the formulation of the first and second law of thermodynamics, that apply to a vast amount of systems, such as gases and crystals. During half a century there was still a problem with the ap...

By suitable reformulations, we cast the mathematical frameworks of several well-known different approaches to the description of nonequilibrium dynamics into a unified formulation valid in all these contexts, which extends to such frameworks the concept of steepest entropy ascent (SEA) dynamics introduced by the present author in previous works on quantum thermodynamics. Actually, the present f...

We establish the foundations of a nonequilibrium theory of quantum thermodynamics for noninteracting open quantum systems strongly coupled to their reservoirs within the framework of the nonequilibrium Green's functions. The energy of the system and its coupling to the reservoirs are controlled by a slow external time-dependent force treated to first order beyond the quasistatic limit. We deriv...