Frequent detection of human herpesvirus-6 sequences by polymerase chain reaction in paraffin-embedded lymph nodes from patients with angioimmunoblastic lymphadenopathy and angioimmunoblastic lymphadenopathy-like lymphoma

In search of a possible involvement of viral agents in angioimmunoblastic lymphadenopathy with dysproteinaemia (AILD) and AILD-like lymphoma (AILD-L), we studied the presence of human herpesvirus-6 (HHV-6) in the lymph node biopsies of 12 cases by polymerase chain reaction (PCR). Given the rarity of this lymphoproliferative disorder, we investigated archival specimens, consisting of formalin-fixed and paraffin-embedded tissues, obtained from patients with a clinical and histologic diagnosis of AILD and AILD-L. HHV-6 sequences were detected in the lymph node biopsies of 7 out of the 12 AILD and AILD-L cases examined. HHV-6 sequences were identified also in the involved liver and spleen tissues of one patient and in the PBMCs of two patients, all carrying viral sequences in the affected lymph nodes. We also used PCR to characterize the HHV-6 genomes, showing that two different viral strains are represented in the pathologic tissues. This study provides evidence of the presence of HHV-6 specific sequences in an unexpectedly high proportion of our series of AILD and AILD-L cases, suggesting a possible involvement of this lymphotropic virus in the pathogenesis of at least some cases of the disease.     

Opposite-channel-based charge injection in SOI MOSFET's under hotcarrier stress

By operating one channel of a typical SOI MOSFET in avalanche while keeping the opposite channel accumulated, charge injection into the opposite gate takes place. Three independent experiments are described that demonstrate the occurrence of this opposite-channel based charge injection. The experimental results are in agreement with PISCES numerical simulations     

Microwave Drymg of Grapes in a Single Mode Cavity at 2450 Mhz - i: Drying Kinetics

Grapes were dried into raisins using combined microwave and convective drying in a single mode cavity specially designed for the studies. Effect of processing parameters, viz.microwave power density (P) air temperature (T) and velocity (u) on drying kinetics was studied in an effort to optimize the operating conditions. The individual and interactive effects of these variables were srudied using three levels of P, four levels of T and two levels of u. Higher drying rates observed with the higher P and T were atuibuted to the increased product temperature and higher partial vapour pressure difference between the surface of the fruit and the air stream. Increase of air velocity increased the drying times. Low drying rate at higher air velocity was attributed to decreased fruit temperature due to rapid convective heat mnsfer at the surface.     

Influence of Two Salicylate Components on the Particle Size of an Oil-in-Water Emulsion with Nonionic Surfactants

This paper reports a study undertaken using techniques of static and dynamic light scattering to investigate the influence of sodium salicylate and methyl salicylate on droplet size of oil-in-water emulsions. The rates of changes were measured by determining the size and distribution of the oil droplet in the material. All emulsions showed a bimodal size distribution; the mean diameters and polydispersity were calculated from intensity. These data were analyzed with nonlinear regressions and bootstrap methodology. An amount of methyl salicylate component induced a decrease of mean diameter and standard deviation. On the contrary, sodium salicylate entailed the growth of all droplet populations and coalescence for the highest concentration.     

The Quest for a Unified Economics

Max Weber (1864–1920) and Joseph Alois Schumpeter (1883–1950)shared roughly the same vision of economics: a unified disciplinecombining economic theory, economic history and economic sociology.They both devoted most of their academic lives to the realizationof this vision. The editors of Industrial and Corporate Changehave organized this review symposium as an occasion to reflecton the present theoretical significance of these two thinkers.Within the last fifteen years, it is clear that the quest fora unified economics, though still unrealized, is once againan important goal to many people working at the intersectionsof economics, history and sociology. In this essay, I will describethe visions held by Schumpeter and Weber, and using WolfgangStolper's book on Schumpeter and Stephen Kalberg's book on Weberas guides, I will contrast the two distinct paths that Schumpeterand Weber took in their quests to achieve a unified discipline.I will conclude with a brief evaluation of how the two booksunder review contribute to an economics so envisioned.     

Ceramic microstructure detected by NMR relaxation and imaging of fluids in the pores

NMR Relaxation and Imaging have been applied to study preparation processes of ceramic porous samples. Relaxation analysis gives a clear characterization of the materials, with high sensitivity. Differences in the method of preparation and steps as low as 25 degrees C in the firing temperatures are well detectable. Furthermore, the images permit distinguishing the different samples. The effects of the contrast in relaxation times dominate those due to the different porosities of the samples. Scanning Electron Microscopy confirms the interpretation that the changes in relaxation times are due to different pore space structures associated with the different firing temperatures. The higher the firing temperature, the larger are the pores and the higher is the amount of compact, sintered matrix, leading to higher relaxation times.