Dispersal and colonization of new areas by armored scale insects (Hemiptera: Diaspididae) is achieved by mobile first-instar nymphs, called crawlers. Few studies have considered the actual mechanisms by which crawlers disperse, and although crawlers are capable of actively wandering over short distances (generally < 1 m), their dispersal over longer distances has been thought to be wind-mediate...

Higher solid contents (20 % and 40 %) nanocomposites of poly (styrene-co-butyl acrylate) including higher content of Cloisite 30B (7 wt% and 10 wt %) were prepared via miniemulsion polymerization. Stability of the final latexes proved outstanding combination of polymerization procedure and surfactants. Morphological studies revealed by TEM, SAX and XRD showed three structures of core-shell, arm...

The article analyzes the testing methodology of BRDM-2L1(sb) armored reconnaissance vehicle with a DOUTZ BF4M1013FC diesel engine, designed to replace BRDM carbureted vehicles gasoline engine currently available in Armed Forces Ukraine. They received new mileage that provides assistance performing their functions around clock zones different climates. During tests prototype an installed engine....

The genus Pseudacanthicus comprises five valid species distributed in the Amazon, Guyana and Suriname basins: P. serratus, P. fordii, P. histrix, P. spinosus and P. leopardus. A new species of Pseudacanthicus from the Tocantins river basin is described. The new species is distinguished from its congeners by the following combination of characters: presence of dark blotches anostomosing to form ...

Fishes of the Loricariidae family, known as "cascudos", constitute an endemic group in Neotropical freshwaters. In this study, were cytogenetically examined two species of Loricariidae (Pterygoplichthysanisitsi Eigenmann & Kennedy, 1903 and Farlowellaamazonum (Günther, 1864) belonging to Hypostominae and Loricariinae subfamilies respectively) from Iguatemi River. Our study provide the first des...

The family Loricariidae with 813 nominal species is one of the largest fish families of the world. Hypostominae, its more complex subfamily, was recently divided into five tribes. The tribe Hypostomini is composed of a single genus, Hypostomus Lacépède, 1803, which exhibits the largest karyotypic diversity in the family Loricariidae. With the main objective of contributing to a better understan...

The loricariid catfish genus Pseudorinelepis is revised. Analysis revealed no difference between the nominal species of Pseudorinelepis and only P. genibarbis is recognized as valid. The Pseudorinelepis from the Rio Branco of Brazil may represent an undescribed species. Pseudorinelepis was examined for its behavior as it relates to the ability of a large esophageal diverticulum to hold air. Pse...

In this study, we tested in vivo effectiveness of a previously developed poly-l-lactide/poly-ε-caprolactone armored vascular graft releasing heparin. This bioprosthesis was designed in order to overcome the main drawbacks of tissue-engineered vascular grafts, mainly concerning poor mechanical properties, thrombogenicity, and endothelialization. The bioprosthesis was successfully implanted in an...

Cannon-based artillery has long been the primary means for ground combat maneuver forces, including armor, infantry, cavalry, airborne, and air assault, because of its ability to deliver accurate fires at relatively long ranges. The self-propelled howitzer (SPH) had its origin in World War I, when a few experimental mounts were tested with medium-caliber cannons rigged on tractor chassis. By th...

Lower mantle seismic scatterers are often interpreted in terms of subducted basaltic crust, which should contain free-silica phases that are seismically fast. However, free-silica phases are unstable in a peridotite lower mantle, as they react with ferropericlase (magnesiowustite) to form silicate perovskite. Nonetheless, conservative estimates and recent measurements of diffusion coefficients ...