The red piranha, Pygocentrus nattereri, is an important resource for artisanal and commercial fisheries. The present study determines the genetic differentiation among P. nattereri populations from the northeastern Brazilian state of Maranhão. The DNA was isolated using a standard phenol-chloroform protocol and the Control Region was amplified by PCR. The PCR products were sequenced using the d...

Henneguya pilosa sp. n., a new species of myxosporean from the gill filaments of the white piranha, Serrasalmus altuvei Ramirez, 1965 (Characidae), a freshwater teleost fish collected in the Zoological Garden of the city of Teresina (Piauí), Brazil, is described from light and transmission electron microscope observations. This myxosporean produced small plasmodia (up to 0.2 mm in diameter), ea...

Abstract Quantum metrology requires a stable single-photon emission and high purity. Since nitrogen-vacancy (NV-) centers provide both features at room temperature, they are promising candidates for the application in this field [1, 2]. The knowledge about suitable sample preparation technique is crucial, because quality of strongly depends on purity spatial resolvability emitters. This work pr...

Implant-associated infections are the major concern for failure of arthroplasty operations. The functionalisation implant surface can provide solutions to problem by either inhibiting adherence bacteria or introducing a contact-killing mechanism. This work is focused on Ti6Al7Nb biomedical alloy modification involving chemical and plasma activation, followed deposition chitosan layers enhanced ...

Sequential consistency is the archetypal correctness condition for the memory protocols of shared-memory multiprocessors. Typically, such protocols are parameterized by the number of processors, the number of addresses, and the number of distinguishable data values, and typically, automatic protocol verification analyzes only concrete instances of the protocol with small values (generally < 3) ...

This paper presents the design and the implementation of a resource management system for monitoring computing resources on a network and for dynamically allocating them to concurrently executing jobs. In particular, it is designed to support adaptive parallel computations|computations that beneet from addition of new machines, and can tolerate removal of machines while executing. The challenge...

The role of the cellular microenvironment is recognized as crucial in determining cell fate and function in virtually all mammalian tissues from development to malignant transformation. In particular, interaction with neighboring stroma has been implicated in a plethora of biological phenomena; however, conventional techniques limit the ability to interrogate the spatial and dynamic elements of...

A simple method for the fabrication of porous silicon (Si) by metal-assisted etching was developed using gold nanoparticles as catalytic sites. The etching masks were prepared by spin-coating of colloidal gold nanoparticles onto Si. An appropriate functionalization of the gold nanoparticle surface prior to the deposition step enabled the formation of quasi-hexagonally ordered arrays by self-ass...