Proving chaos for a system of coupled logistic maps: A topological approach.

In the work, we prove the presence of chaotic dynamics, for suitable values of the model parameters, for the discrete-time system, composed of two coupled logistic maps, as formulated in Yousefi et al. [Discrete Dyn. Nat.

Prevalence of hepatitis G virus RNA in human immunodeficiency virus type 1-positive intravenous drug users.

Objective: The aim of this study was to evaluate the prevalence of the new human flavivirus hepatitis G virus (HGV) in Italian intravenous drug users (IDUs) and its interaction with human immunodeficiency virus type 1 (HIV-1) and hepatitis C virus (HCV).

Study Design/methods: Seventy-nine IDUs with different clinical stages of HIV-1 infection and 20 non-IDU patients with chronic HCV infection were included in the study. HGV RNA was detected by means of reverse transcription-polymerase chain reaction (RT-PCR) used for the amplification of two HGV-related sequences included in the 5'-noncoding (NCR) and NS5a regions.

Human T-lymphotropic virus type 2 (HTLV-2) provirus in circulating cells of the monocyte/macrophage lineage in patients dually infected with human immunodeficiency virus type 1 and HTLV-2 and having predominantly sensory polyneuropathy.

We investigated the presence of human T-lymphotropic virus type 2 (HTLV-2) DNA in the peripheral blood mononuclear cell subsets obtained from 18 patients coinfected with human immunodeficiency virus type 1 and HTLV-2, 6 of whom also had predominantly sensory polyneuropathy (PSP). HTLV-2 DNA and RNA were found in CD8- and CD19-positive cells, and, for patients with PSP, in CD14-positive cells as well. Furthermore, the patients with PSP had higher proviral loads than those without PSP.

Quantitation of glycated hemoglobins in human adult blood by capillary isoelectric focusing.

A precise and reproducible method for assessment of glycated hemoglobin in human adult red blood cells is reported, based on capillary isoelectric focusing (IEF). In order to obtain baseline resolution between adult hemoglobin (Hb A) and its glycated form (Hb A1c), two species which differ by minute delta pI values, < 0.03 pH units, the following procedure was adopted: the focusing mixture consisted of 5% Ampholine, pH 6-8, 0.

An isoelectric focusing study of seasonal variation in rattlesnake venom proteins.

Adult specimens of seven southern Pacific rattlesnakes (Crotalus viridis helleri), four northern black-tailed rattlesnakes (Crotalus molossus molossus), and six western diamondback rattlesnakes (Crotalus atrox) were housed under controlled light and temperature and milked of venom monthly for 20 months. Ambient conditions were modelled to simulate seasonal change. Weighed amounts of lyophilized venom from each snake were compared chronologically for variation in isoelectric focusing patterns, using natural and immobilized gradients.