Ultra-long monostable multivibrator employing bistable semiconductor switch to allow charging of timing circuit Patent

Extra-long monostable multivibrator employing bistable semiconductor switch to allow charging of timing circui

Sorgo granífero (Sorghum bicolor (L.) Moench) de alta lisina no Brasil.

Pequenas quantidades de sementes de duas linhagens de sorgo, com um gene recessivo simples para lisina, descoberto recentemente na Colecao Mundial de Sorgos da Universidade de Purdue, West Lafayette, Indiana, U.S.A., foram plantas para multiplicacao de sementes pela EMBRAPA e pela EPAMIG em Sete Lagoas, Minas Gerais. As linhagens mostraram nao adaptadas, com porte alto, maturidade tardia e susceptibilidade a doencas. Sementes geneticas de duas linhagens de alta lisina e algumas selecoes de porte baixo e precoce poderao ser requisitadas. As propriedades quimicas e biologicas do sorgo com o mutante para alta lisina foram previamente revisadas

Circuit improvement produces monostable multivibrator with load-carrying capability

Improved circuit provides greater reliability and load-carrying capabilities for monostable multivibrator

Nonlocal ultrafast demagnetization dynamics of Co/Pt multilayers by optical field enhancement

The influence on ultrafast demagnetization dynamics of metallic nano-structured gratings deposited on thin films of magnetic Co/Pt multilayers is investigated by the time-resolved optical Kerr effect. Depending on the polarization of the pump pulse, a pronounced enhancement of the demagnetization amplitude is found. Calculation of the inhomogeneous optical field distribution due to plasmon interaction and time-dependent solutions of the coupled electron, lattice, and spin temperatures in two dimensions show good agreement with the experimental data, as well as giving evidence of non-local demagnetization dynamics due to electron diffusion.BMBF, 05K10KTB, Verbundprojekt: FSP 301 - FLASH: Nanoskopische Systeme. Teilprojekt 1.1: Universelle Experimentierkammer für Streuexperimente mit kohärenten Femtosekunden-Röntgenpulsen Multi Purpose Coherent Scattering Chamber for FLASH and XFEL 'MPscatt

Comportamento de fontes de resistência em relação à mosca do sorgo.

A mosca do sorgo Contarinia sorghicola (Coq.1898) e a praga mais importante para a cultura do sorgo, visando a producao de graos. No atual estagio de pesquisa o metodo de controle mais promissor em relacao a essa praga e o de resistencia de plantas. Existem, na literatura, trabalhos indicando fontes de resistencia de diferentes origens. Segundo dados obtidos no Brasil, a melhor fonte tem sido AF-28. O objetivo principal do presente trabalho foi avaliar uma colecao de materiais citados como resistentes, que fazem parte do banco de germoplasma de sorgo do CNPMS, ao lado de progenies F-6 do cruzamento entre AF28 e a linhagem Tx 2536. Para este estudo, foram realizados dois ensaios em condicoes de campo. Um em Ribeirao Preto, SP, sob infestacao natural e outro em Sete Lagoas, MG, com infestacao artificial. No primeiro caso, quando o campo apresentava-se florescido, cerca de 50 plantas, por entrada, foram etiquetadas segundo o estagio de florescimento da panicula assim classificado: O inicio de florescimento; 1 de 1-20%; 2 de 21-40%; 3 de 41-60%; 4 de 61-80%; 5 de 81-100% de florescimento. Apos a granacao, os dados da mosca foram estimados pela escala visual de notas de Wiseman e McMillian (1968), que varia de 0 (zero) a 10 (dez). As entradas foram comparadas entre si em cada estagio de florescimento. No segundo ensaio, dois tipos de infestacao artificial foram realizados: primeiramente, utilizando-se de gaiolas, confinou-se cerca de 200 adultos em cada panicula florescida, em tres repeticoes, para cada entrada..

Termite resistance of DMDHEU-treated wood.

Four field trials were conducted with wood modified with dimethyloldihydroxy-ethyleneurea (DMDHEU) in contact with subterranean termites. Trials 1 to 3 were conducted with Coptotermes acinaciformis (Froggatt); 1 and 2 in south-east Queensland, and 3 in northern Queensland, Australia. Trial 4 was conducted in northern Queensland with Mastotermes darwiniensis (Froggatt). Four timber species (Scots pine, beech, Slash pine and Spotted gum) and two levels (1.3 M and 2.3 M) of DMDHEU were used. The tests were validated. DMDHEU successfully prevented damage by C. acinaciformis in south-east Queensland, but not in northern Queensland. It also did not protect the wood against M. darwiniensis. Except for beech in trial 4, DMDHEU led to reduced mass losses caused by termite attack compared to the unmodified feeder stakes. Slash pine (in trials 1 and 3) and Spotted gum (in trial 1) presented low mass losses. Modification of Scots pine was more effective against termite damage than the modification of beech

Solid-phase-assisted synthesis of targeting peptide-PEG-oligo(ethane amino)amides for receptor-mediated gene delivery.

In the forthcoming era of cancer gene therapy, efforts will be devoted to the development of new efficient and non-toxic gene delivery vectors. In this regard, the use of Fmoc/Boc-protected oligo(ethane amino)acids as building blocks for solid-phase-supported assembly represents a novel promising approach towards fully controlled syntheses of effective gene vectors. Here we report on the synthesis of defined polymers containing the following: (i) a plasmid DNA (pDNA) binding domain of eight succinoyl-tetraethylenpentamine (Stp) units and two terminal cysteine residues; (ii) a central polyethylene glycol (PEG) chain (with twenty-four oxyethylene units) for shielding; and (iii) specific peptides for targeting towards cancer cells. Peptides B6 and c(RGDfK), which bind transferrin receptor and αvβ3 integrin, respectively, were chosen because of the high expression of these receptors in many tumoral cells. This study shows the feasibility of designing these kinds of fully controlled vectors and their success for targeted pDNA-based gene transfer