well-defined crystalline pbse nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using pb2+- edta and pb2+- oleylamine complexes at 180°c for different reaction times. composition and morphology of the samples have been characterized by means of xrd and sem. gradual release process of pb2+ from pb2+-edta and pb2+-oleylamine complexes can adjust the growth ra...

For more than 30 years temephos, an organophosphate insecticide, has been the sole larvicide used in Brazil in the control of Aedes aegypti. Organophosphates were also used for adult control, being replaced by pyrethroids since 1999. In this same year the Brazilian Health Foundation started the coordination of the Ae. aegypti Insecticide Resistance Monitoring Program. In the context of this pro...

1 Departamento de Oceanografia e Pescas, Instituto do Mar, Universidade dos Açores, Horta, Portugal, 2 Marine and Environmental Sciences Centre, Universidade dos Açores, Horta, Portugal, 3 Departamento de Oceanografia e Pescas, Universidade dos Açores, Horta, Portugal, 4 Marine and Environmental Sciences Centre, Universidade de Coimbra, Coimbra, Portugal, 5 Aquatic Ecosystems Research Laborator...

The efficient, simultaneous synthesis of structurally diverse compounds, better known as diversity-oriented synthesis (DOS), is not obvious, and remains a challenge to synthetic chemistry. This personal account details why DOS has such enormous implications for the discovery of small molecules with desired properties, such as catalysts, synthetic reagents, biological probes and new drugs, Also,...

The definition and main results connected with Gröbner basis, Hilbert series and Anick's resolution are formulated. The method of the infinity behavior prediction of Gröbner basis in noncommu-tative case is presented. The extensions of BERGMAN package for IBM PC compatible computers are described. Let A =< X|R > be a finitely presented associative algebra over field K. Here are the main example...

ndudablemente, MS-DOSR (MicroSoft Disk Operating System) ha sido el sistema operativo de mayor éxito en la historia, estando presente en una amplia base de equipos de tipo personal. Si bien se le considera obsoleto después de la aparición de nuevos sistemas tales como Windows, DOS aún representa una herramienta flexible y sumamente poderosa como monitor para equipos dedicados, principalmente pa...

Well-defined crystalline PbSe nanocubes and nanospheres have been synthesized through a simple hydrothermal method by using Pb2+- EDTA and Pb2+- oleylamine complexes at 180°C for different reaction times. Composition and morphology of the samples have been characterized by means of XRD and SEM. Gradual release process of Pb2+ from Pb2+-EDTA and Pb2+-oleylamine complexes can adjust the growth ra...

Digital's PATHWORKS for DOS version 4.1 personal computer integration software includes two network virtual device drivers for the Microsoft Windows environment. These drivers allow Windows applications operating in a protected processor mode and standard DOS applications in a virtual machine to concurrently access services designed to run in real mode under the DOS operating system. The networ...

Uma série de cetonas e ésteres α,β-insaturados β-amino ésteres, 4a-h e 6a-d, derivados de α-amino ácidos foi obtida a partir dos cloridratos dos α-amino ésteres 2a-d e dos compostos 1,3-dicarbonílicos 3a,b e 5 em presença de trietilamina. Estes compostos foram preparados empregando energia de microondas, sem uso de solvente, utilizando como suporte sólido K-10 ou KSF e também foram efetuadas re...