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The early extra- and intra-cellular interaction between adenovirus type 2 and HeLa cells was studied in the presence of benzyl alcohol as a fluidizing agent. The process of virus attachment and internalization were not affected at 5-15 mM of benzyl alcohol at 25 degrees C. Under the same conditions an enhancement by 45% at the most was demonstrated for the(More)
Internalization of the infectious fraction of human adenovirus type 2 into HeLa cells was followed by a quantitative internalization assay. Treatments known to selectively block receptor-mediated endocytosis reduced the internalization of infectious virus to an extent close to the reduction of endocytosis of transferrin. This suggests that one of the first(More)
An improved method for the isolation and purification of infectious pancreatic necrosis virus (IPNV) is described. Virions released into the clarified growth medium are adsorbed to an anion exchange resin of diethylaminoethyl cellulose at pH 8.1. IPNV together with the likewise released and accumulated excess pool of the precursor to the major capsid(More)
During the entrance of adenovirus type 2 into cells, it has been suggested that the virion undergoes a conformational change. In this investigation, we have further characterized the hypothetical conformational change, which the structural protein hexon undergoes in response to low pH. From pH 5.0 to pH 6.0, the proteolytic enzyme dispase cleaved the hexon(More)
The set of programs that simulate the LDPC-coded multicarrier transmissions (MC) is composed of two programs:-MP_SimSU employed for the performance evaluation of LDPC-MC for a point-to-point or a single user connection;-MP_siteSim intended for the performance evaluation of a multiuser downlink connection in a mobile environment. MP_SimSU The MP_SimSU(More)
—Cooperative hybrid ARQ (HARQ) protocols have been widely studied in recent years and they were shown to provide higher efficiency than cooperative protocols. This paper proposes a joint design within which the HARQ protocol collaborates with the link adaptation functionality and the cooperative transmission scheme in order to adapt the behavior of the HARQ(More)
This paper proposes a practical approach to load balancing in heterogeneous wireless networks, which is based on the adaptation of the multiple knapsack problem to this specific scenario. Several algorithms capable of solving the knapsack problem are considered, namely a brute force, a dynamic programming and a greedy approach. The algorithms are evaluated(More)
In this paper, we propose a method to predict the block error rate performance of the wireless links in OFDM communication systems. Our approach relies on a performance prediction methodology that uses the mean mutual information per coded bit as quality measure. We make a simplification within this methodology such that, contrary to existing approaches,(More)