application of phosphorus (p) fertilizers as solid or liquid fertilizers to soils leads to re-actions of orthophosphate ions with various soil components which remove p from the so-lution phase and convert it to less soluble phosphates. this study was aimed at determin-ing soil properties that affect the rate of phosphate retention in 28 contrasting calcareous soils from different geographical ...

the enzyme rhodanese (thiosulfate: cyanide sulfurtransferase) is a ubiquitous enzyme and its activity ispresent in all living organisms. many functions including cyanide detoxification, formation of iron-sulfurcenters and participation in energy metabolism have been attributed to this enzyme. the enzyme catalyzesthe transfer of a sulfur atom from sulfane containing compounds (such as thiosulfat...

pulmonary hypertension is rare but is one of the complications that occur due to hiv infection. symptoms of hiv-associated pulmonary arterial hypertension are often non-specific but the main symptom of the disease is dyspnea. in this cross-sectional study, we measured systolic pulmonary arterial pressure (spap) by echocardiographic methods among hiv-positive patients who received art. this rese...

Active networking is a general approach to incorporating general-purpose computational capabilities within the communications infrastructure of data networks. This paper studies the key design issues that must be resolved to allow active networking to become a mainstream technology.

This paper deals with three methods of determination of reference current for control of single-phase active filters. All this methods are based on the idea that an ordinary single-phase (system) quantity can be complemented by a fictitious second phase so that both of them will create an orthogonal and orthonormal system.

The modular reenement of object-oriented specii-cations requires a sound theory of behavioural compatibility of classes. Such a theory will depend on the way in which objects of a class interact with their environment. This paper deenes two notions of behavioural compatibility. Observational compatibility is relevant when an active object is placed within a passive environment and operational c...