Effects of different amounts of lead (Pb) and tin (Sn) on microstructure and tensile properties of the AZ91 alloy were studied. The results presented that the microstructure of AZ91 alloy is consisted the α-Mg phase and semi-continuous network of β-Mg17Al12 intermetallics. For the as-cast AZ91 alloy, the average grain siz and the β phase volume fraction were 96.2 µm and of 25.3%, respectively. ...

The distribution of genetic polymorphisms of chemokine receptors CCR532, CCR2-64I and chemokine (SDF1-3’A) mutations were studied in 110 Human Immunodeficiency Virus type 1 (HIV-1) seropositive individuals (seropositive group) and 139 seronegative individuals (seronegative group) from the population of the northern Brazilian city of Belém which is the capital of the state of Pará in the Brazili...

OBJECTIVES Patients with clinical, genetic and histological features of coeliac disease (CD), but negative for serological markers, pose a significant clinical problem. The aim of this study was to outline a specific profile, and to evaluate the natural history and response to gluten-free diet (GFD) of patients with seronegative CD. METHODS patients with duodenal mucosa damage Marsh I, II and...

Significant differences in the relationships between fragment, neutron, and charged particle multiplicities were found between Sn+Sn and Sn+Sn collisions at 40 MeV/A. In this paper we explore the possibility to explain this phenomenon in the framework of percolation models, and find, that the results are only reproducible in part.

Percolation models have proven highly successful in the simulation of multifragmentation reactions in the past @1,2#. Within these models, fragmentation is described by first distributing a set of points or sites, each representing a nucleon, on a three-dimensional lattice, which represents the bonds between the sites. In the case of a simple rectangular lattice, each site is connected to six n...

The transfusion-transmitted cytomegalovirus (TT-CMV) can cause serious morbidity and mortality in low-birth weight infants (LBWIs). Transfusion-transmitted cytomegalovirus can be minimized in LBWIs born to cytomegalovirus (CMV)-seronegative mothers with the use of CMV-seronegative blood components. Despite evidence that has independently shown that either leukoreduction or the use of CMV-serone...

Serology is frequently used for the diagnosis of coeliac disease in children; however, a small proportion of children are seronegative. We present a case of seronegative coeliac disease along with literature review to include diagnostic and management dilemmas.

Cytomegalovirus (CMV) is one of the most frequent microbes linked with kidney transplant recipients. CMV infection typically classified as virus isolation in any body fluid or specimen. We present a 43-year-old man who underwent deceased donor donor-seronegative and recipient-seronegative (CMV D-/R-) status completed three months prophylaxis high-dose acyclovir given his low-risk status. He was...

Seventy-seven cytomegalovirus (CMV)-seronegative marrow transplant patients were randomized in a prospective controlled trial comparing the use of leukocyte-depleted platelets plus CMV-seronegative red blood cells with standard unscreened blood products for the prevention of primary CMV infection during the first 100 days after transplant. Eligible patients included CMV-seronegative patients un...