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Article
The effect of bioreactor configuration on production of HIV and cell-virus interaction
In an attempt to establish a bioreactor system for generation of HIV that is practicable, efficient, biologically contained, and capable of scale up, the production of two strains of this virus was examined in...
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Article
A new class of exact solutions of the vacuum quadratic Poincaré gauge field theory
A class of algebraically special exact solutions of the vacuum quadratic Poincaré gauge field theory is presented. These solutions are of type III and type N and have a nonexpanding, shear-free and twist-free ...
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Article
Use of lactate dehydrogenase release to assess changes in culture viability
This study reports the use of lactate dehydrogenase release to monitor changes in culture viability in flask culture and fixed bed, porosphere bioreactor systems. Lactate dehydrogenase release shows good agree...
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Article
The application of spin coefficient techniques in the vacuum quadratic Poincaré gauge field theory
The vacuum field equations of the quadratic Poincaré gauge field theory are expressed in the spin coefficient formalism of Newman and Penrose. These are differential identities involving curvature and torsion ...
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Article
Colliding plane gravito-electromagnetic waves
The collision and interaction of plane electromagnetic waves is considered. Field equations are formulated and the appropriate boundary conditions are described in detail. A solution-generating technique is de...
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Article
Cell culture standardization and reference cell lines
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Article
Production of biologicals using large scale culture
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Article
Book review
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Article
Book reviews
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Article
Book review
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Article
Book review
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Article
Fixed bed porous glass sphere (porosphere) bioreactors for animal cells
Process intensity of fixed bed glass sphere culture systems is increased considerably by replacing solid glass spheres with open pore glass spheres. This technique demonstrates the possibility of having a syst...
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Article
Algebraically special, nonaligned, non-null Einstein-Maxwell fields
A class of algebraically special non-null electrovac solutions is presented, in which the repeated principal null congruence is shear free, twist free, and geodesic, and is not aligned with a principal null di...
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Article
A spin-coefficient approach to Weyssenhoff fluids in Einstein-Cartan theory
The generalized Newman-Penrose formalism is used to analyze semiclassical aligned spin fluids satisfying the Weyssenhoff restriction in the framework of Einstein-Cartan theory. Some general properties are deri...
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Article
Neutrino fields in Einstein-Cartan theory
The spin-coefficient formalism presented elsewhere is here applied to classical neutrino fields in Einstein-Cartan theory. It is shown that the neutrino current vector is tangent to an expansion-free null geod...
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Article
A Newman-Penrose-type formalism for space-times with torsion
The familiar Newman-Penrose formalism, in which the curvature of space-time is represented in terms of spin coefficients, is here extended to include the possibility of an asymmetric connection. It is hoped th...
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Article
On the propagation of photons and neutrinos in curved space-time
It is shown using a classical wave theory approach that photons and neutrinos have different propagation properties in curved space-time. It is also shown that neutrinos have the anomalous property that the si...
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Article
Interacting electromagnetic waves in general relativity
The problem is considered of finding exact solutions of the Einstein-Maxwell equations which describe the physical situation of two colliding and subsequently interacting electromagnetic waves. The general the...
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Article
On the superposition of electromagnetic waves in general relativity
It is shown that, in a region of space-time containing two independent electromagnetic waves propagating in different directions, it is not possible for the two waves to follow simultaneously affinely paramete...
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Article
Neutrino radiation in spherically-symmetric gravitational fields. III. Comparison with photon radiation fields
The gravitational properties of spherically-symmetric photon and neutrino radiation fields are compared and found to be identical. A model for the photon radiation field made up of incoherent radiation is firs.....
