38 research outputs found
Caracterização de formas botânicas diversas do Banco Ativo de Germoplasma de cafeeiros do Estado de Minas Gerais, Brasil
Prototype ATLAS IBL Modules using the FE-I4A Front-End Readout Chip
The ATLAS Collaboration will upgrade its semiconductor pixel tracking
detector with a new Insertable B-layer (IBL) between the existing pixel
detector and the vacuum pipe of the Large Hadron Collider. The extreme
operating conditions at this location have necessitated the development of new
radiation hard pixel sensor technologies and a new front-end readout chip,
called the FE-I4. Planar pixel sensors and 3D pixel sensors have been
investigated to equip this new pixel layer, and prototype modules using the
FE-I4A have been fabricated and characterized using 120 GeV pions at the CERN
SPS and 4 GeV positrons at DESY, before and after module irradiation. Beam test
results are presented, including charge collection efficiency, tracking
efficiency and charge sharing.Comment: 45 pages, 30 figures, submitted to JINS
ESTAQUIA LENHOSA DE PORTA-ENXERTOS DE VIDEIRA PROMISSORES PARA REGIÕES COM HISTÓRICO DE MORTE DE PLANTAS
Efeito de glyphosate e imazaquin na comunidade bacteriana do rizoplano de soja (Glycine max (L.) Merrill) e em caracterÃsticas microbiológicas do solo
Growth and reproduction of the mangrove crab Goniopsis cruentata (Latreille, 1803) (Crustacea: Decapoda: Grapsidae) in southeastern Brazil
Efeito da interação do nicosulfuron e chlorpyrifos sobre o banco de sementes e os atributos microbianos do solo
Avaliação da qualidade da água do Ribeirão Samambaia (São Pedro, São Paulo, Brasil) através de parâmetros fÃsicos e quÃmicos, Ãndice de estado trófico e teste de toxicidade com Daphnia magna
Ground waste ceramic brick effect at different times on mortar
The work aims to observe the effect of waste ceramic brick (WCB), ground in two times, 60 and 120 min for use in mortar. The crystalline phases presented in clays of the north of Rio de Janeiro have already been identified, indicating that after firing at an adequate temperature, it is possible to apply it as a pozzolanic material. In this direction, in Brazil there is a single metakaolin industry in São Paulo operating in the domestic market supplying pozzolanic material for all regions of the country. The researched material was burned in the industry at approximately 700 °C, and its pozzolanic activity was tested by the Luxán test presenting 2.01 mS/cm (good pozzolanicity). The mortars proportions were 1:6 (cement: sand), with the addition of 0% (reference), 10%, 20% and 30% of WCB, and their crystalline phases were analyzed by XRD and it was not identified a kaolinite peak, a good indication of the transformation to metakaolinite. The tests in both fresh and hardened state were performed. For both grindings, the residue reacted with the paste, a fact confirmed by the nucleation calorimetry of particles <2 μm (20%–25% clay fraction), reducing the pore size from 0.90 to 50 μm to 0.008 at 5 μm, forming C–S–H in the XRD and the portlandite peaks disappearing when compared to the reference. The results showed that the best result was 10% incorporation, both for WCB ground for 60 and 120 min, and this is the proportion indicated