Nanotecnología: un pequeño gran paso
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El MIT afirma que dentro de tres meses un ejército de Nano Caminantes (microrobots) manipulará partículas subatómicas. Este avance anuncia una nueva era tecnológica, mientras la industria se prepara para dar el “pequeño gran paso” de los genomas a los átomos.
Pulgarcito con actitud: De acuerdo con los investigadores del Laboratorio de Bioinstrumentación del Instituto Tecnológico de Massachusetts (MIT, por sus siglas en inglés), cientos de robots de tres patas del tamaño de un dedo, equipados con tablero de controles, poderosos microscopios y biosensores, estarán listos para manufacturar materiales a nano-escala a mediados del año 2002, Un ‘nano’ mide un milésimo de un millonésimo de metro. Con sólo 32 milímetros de diámetro, los microrobots están diseñados para ensamblar partículas atómicas y subatómicas. Respondiendo a señales infrarrojas que permiten a cada robot actuar independiente o colectivamente en millares de tareas, las pequeñas máquinas (apodadas “Nano Caminantes”) son capaces de ejecutar 48 millones de instrucciones y hacer 4,000 nano maniobras por segundo. El MIT espera tener al menos 300 microrobots trabajando arduamente en una cámara cerrada de cromo del tamaño de una mesa de juegos para junio de este año. La superficie de cromo provee de una fuente de energía para los robots, los cuales recibirán órdenes de trabajo de una computadora maestra en la parte superior de la cámara.
Nanotech Takes a Giant Step Down!
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MIT says an army of NanoWalkers (microbots) will be performing sub-atomic operations within three months. The development signals a new era in technology as industry prepares to move "down" from genomes to atoms.
Thumbelina with an attitude: Hundreds of three-legged robots the size of a thumb, complete with onboard computers, powerful microscopes, and biosensors will be ready to manufacture nano-scale materials by mid-2002, according to researchers at the Massachusetts Institute of Technology (MIT) Bioinstrumentation Laboratory. A 'nano' is a measurement of one-billionth of a meter. Only 32 millimeters in diameter, the microbots are designed to manipulate atoms. Responding to infrared signals allowing each microbot to act independently or collectively on myriad tasks, the little machines (dubbed "NanoWalkers") are capable of executing 48 million instructions and making 4,000 nano-maneuvers per second. MIT expects to have at least 300 microbots hard at work in an enclosed card-table sized chromium chamber by June. The chromium surface provides an energy source for the robots which will receive their marching orders from a master computer in the box's ceiling.
Silent Science
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If you don't have anything nice to say don't say anything at all? When the policy committee of the world's most important agricultural science network met last week, they evaded all the tough questions related to transgenic maize in Mexico - the crop's center of genetic diversity. Last year, and again last month, the Mexican Environment Ministry confirmed that farmers' maize varieties in at least two states had been contaminated with DNA from genetically modified maize.
Ciencia Silenciosa
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Si no tiene nada bonito que decir, ¿mejor quedarse callado?
El comité de políticas del CGIAR, la red de científicos agrícolas más grande del mundo, reunido la semana pasada, evadió todas las preguntas difíciles relacionadas con el maíz transgénico en México, centro de diversidad genética de ese cultivo, pese a que el año pasado(2001) y reiteradamente el mes pasado (01/2002), la Secretaría de Medio Ambiente de México confirmó que las variedades nativas de maíz en por lo menos dos estados están contaminadas con ADN de maíz genéticamente modificado.
Unnatural Rejection?
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Unnatural Rejection? The academic squabble over Nature magazine's peer-reviewed article is anything but academic:
More than 144 farmer and other Civil Society Organizations from 40 countries have signed a Joint Statement being released today on the Mexican GM Maize Scandal. The Statement comes on the eve of an international science policy meeting in Los Banos, Philippines where a global response to the scandal will be discussed. The 144 organizations are demanding that the UN Food and Agriculture Organization (FAO) and the Consultative Group on International Agricultural Research (CGIAR) work together with the Convention on Biological Diversity to halt the contamination of the Mesoamerican Centre of Genetic Diversity for maize - one of the world's most important food crops. News that genetically modified (GM) maize was turning up in farmers' varieties first appeared in Nature Biotechnology magazine last September and was confirmed in November by a peer-reviewed article in Nature. According to the 170 signatories to today's Joint Statement, the academic and industry attacks on the findings of the Mexican Government and U.S. university researchers has been orchestrated to keep the scandal from embarrassing the biotech industry as it tries to lift the European, Brazilian, and Mexican moratoria (de facto or otherwise) on genetically modified seeds or foods. If the Philippine meeting of the Genetic Resources Policy Committee of the CGIAR does not act decisively and immediately to protect farmers in Mesoamerica, civil society will take the issue directly to the April meeting of the Biodiversity Convention in the Hague, and the World Food Summit in Rome in June. The text of the Joint Statement follows.