A Multi-parameter Integrated Water Quality Sensors System

International audienceBecause of the rapid development of aquaculture in China at present, it is more and more urgent to apply hi-tech devices in aquaculture field to guarantee its efficiency. There are already many devices used for monitoring water quality have been developed. However, many of them are only in a step of academic research or too expensive to apply to practices. In this paper, a multi-parameter integrated water quality sensors system which has a practical value based on self-contained design is introduced and the hardware and software of this system are researched and discussed. A test conducted at Taihu Lake in Jiangsu province, China shows that this system can perform well. And this system has many features such as low cost, low consumption, multi-parameter and real-time data upload. The features and good performance above suggest the practical and potential application of the system in water monitoring. And this system still has much space to improve. It may become lighter, more integrated, and more portable in the future

A piscicultura e o ambiente: o uso de alimentos ambientalmente corretos em piscicultura Fish farming and the environment: the use of environmental friendly feeds in fish culture

Embora a ciência da nutrição de peixes esteja longe de estabelecer um padrão geral de exigências nutricionais, a necessidade de desenvolvimento de alimentos de baixo impacto poluente há muito faz parte da agenda das comunidades científica e empresarial internacional da aqüicultura. Não só é absolutamente possível formular alimentos ambientalmente corretos, como é necessário modelar a formulação destes alimentos. Porém, é necessária absoluta acurácia para atender formulações espécie-específicas, considerando-se as interações da biologia e fisiologia nutricional das espécies com os alimentos e com as variações abióticas do meio. O conhecimento disponível sobre as mais de 200 espécies de peixe produzidas comercialmente no mundo é ainda incipiente e os sistemas de produção de peixe, nos diferentes regimes de exploração, estão implantados em todas as condições ecológicas possíveis. Neste cenário, produzir rações ambientalmente corretas é, senão impossível, pelo menos muito difícil e depende da ação coordenada e positiva de produtores, indústria da alimentação, agências regulatórias, e instituições de ensino e pesquisa para definir os parâmetros necessários à consecução deste objetivo.<br>Although fish nutrition science is far from establishing general standards of nutritional requirements, the need for developing low impact feeds has long been included in the agenda of aquaculture's international scientific and business communities of. Not only is absolutely possible to formulate environmental friendly feeds, as it is necessary modeling the formulation of these feeds. However, it is necessary higher accuracy to develop species-specific formulations, considering interactions of the biology and nutritional physiology of the species with the feedstuffs and variations of abiotic environment. The knowledge on more than 200 species of commercially farmed fish is still incipient and fish production systems, in their most varied farming conditions, are set up in every possible ecological conditions. In this scenario, producing environmental friendly feeds is if not impossible, at least very, very difficult, depending on coordinated and positive action of producers, industry, regulatory agencies, and institutions of higher education and research to define the parameters needed to achieve this goal

Development of targeted viral vectors for cardiovascular gene therapy

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