Theoretical prediction of surface tension of ternary liquid system (nitrogen + oxygen + argon) at elevated temperature and different pressure

The surface tension of a ternary liquid mixture of nitrogen, oxygen, and argon has been calculated by a new approach using critical constants Pc, Vc, and Tc at temperatures ranging from 90 to 110 K and pressure up to 865 kPa. New formalism has been made by modifying the Brock-Bird relation. The computed values are compared with the experimental findings. Satisfactory results have been obtained.     

Integrability theorems for a class of integral transforms

It is shown under weak hypotheses that systems of 2n linear differential equations in 2n variables generate sets of identities similar in structure to the classical trigonometric identities. For clarity of exposition only the case n = 1 is actually treated, but all final equations are written in such a manner as to be directly applicable to matrix systems (n > 1). These identities allow one to avoid, in a very simple way, certain difficulties which often occur in the integration of the Riccati equations arising from application of the invariant imbedding method to two point boundary value problems associated with such linear systems. The overall usefulness of the imbedding method is thereby considerably extended. One analytical and one numerical example are given to illustrate the actual use of these identities.     

Influence of hydrogen sulfide on the growth and metabolism ofbutyribacterium methylotrophicum andclostridium acetobutylicum

Applied Biochemistry and Biotechnology - Studies were conducted to determine the effect of hydrogen sulfide (H2S) on the growth and metabolism ofButyribacterium methylotrophicum andClostridium...     

New approach to short range repulsion in pion condensation

We develop a new method, using static density correlation functions, to look at the effects of nucleon repulsion at short distances in a nuclear medium. The change in the critical density for pion condensation from the above effect is computed. Also, we investigate the behavior of the critical density on the inclusion of Δ-isobars and of S-wave pion-nucleon repulsion.     

YBa2Cu3O7−y composites for improved fabricability

Composites of YBa₂Cu₃O_7−y with silver powder have been investigated for their fabricability and superconductivity. Silver does not react with the oxide powder. The composites can be easily rolled into thin strips. There is no appreciable degradation inT _c either during sintering or rolling.     

Vibrations of non-uniform rectangular plates: A spline technique method of solution

The fourth order differential equation governing the transverse motion of an elastic rectangular plate of variable thickness has been solved, by using the quintic spline interpolation technique. An algorithm for computing the solution of this differential equation is presented, for the case of equal intervals. Frequencies, mode shapes and moments for doubly symmetric, antisymmetric-symmetric and second symmetric-symmetric modes of vibration are presented for various cases of boundary conditions.     

Pathways to rare baryonic B decays

We point out new ways to search for charmless baryonic B decays and suggest that enhanced baryon production is favored by reduced energy release on the baryon side. Thus B-->eta(')+baryon pairs might be larger than Kpi/pipi modes; the argument may be extended to B-->gamma+X(s), and perhaps to lnu+X(u). Guess estimates give some branching ratios in the 10(-3)- 10(-6) range, with confidence gained from the recent observation of B-->D(*)pn, D(*)pppi not far below D(*)pi and D(*)rho rates. Observation of modes proposed here would help clarify the dynamics of weak decays involving baryons, while the self-analyzing prowess of Lambda decay can be helpful in CP- and T-violation studies.     

A Multi-Objective Production Inventory Model with Backorder for Fuzzy Random Demand Under Flexibility and Reliability

In this paper, an Economic Production Quantity (EPQ) model is developed with flexibility and reliability consideration of production process in an imprecise and uncertain mixed environment. The model has incorporated fuzzy random demand, an imprecise production preparation time and shortage. Here, the setup cost and the reliability of the production process along with the backorder replenishment time and production run period are the decision variables. Due to fuzzy-randomness of the demand, expected average demand is a fuzzy quantity and also imprecise preparation time is represented by fuzzy number. Therefore, both are first transformed to a corresponding interval number and then using the interval arithmetic, the single objective function for expected profit over the time cycle is changed to respective multi-objective functions. Due to highly nonlinearity of the expected profit functions it is optimized using a multi-objective genetic algorithm (MOGA). The associated profit maximization problem is illustrated by numerical examples and also its sensitivity analysis is carried out.     

Drug Surfactant and Polymer Mediated Acid Catalyzed Hydrolysis of Acetohydroxamic Acid

The effects of drug-surfactant and polymer on the acid hydrolysis of acetohydroxamic acid (AHA) have been studied at room temperature in 2% (v/v) dioxane medium. Kinetic data corresponding to the reaction with drug micelles are analyzed by using the pseudo-phase ion exchange model. The binding constant and first-order rate constant in micellar media in presence of AMYTP⁺-Drug, AMYTP⁺-β-Cyclodextrine, AMYTP⁺-SDS, AMYTP⁺-PEG, AMYTP⁺-TX-100, AMYTP⁺-CTAB, have been studied in 0.5 M HCl media.