22 documents found, page 1 of 3
Reflectance and fluorescence characteristics of PTFE coated with TPB at visible...
Haefner, J.; Fahs, A.; Ho, J.; Stanford, C.; Guenette, R.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A.I.; Arazi, L.; Arnquist, I.J.Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200 nm, 260 nm, and 450 nm. Th...
A compact dication source for Ba2+ tagging and heavy metal ion sensor development
Navarro, K.E.; Baeza-Rubio, J.; Boyd, M.; Foss, F.W.; Giri, S.; Jones, B.J.P.; Miller, R.L.; Nygren, D.R.; Samaniego, F.J.; Stogsdill, K.We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time...
Contribution to the study of connective fibers in human mitral valve
Soares, J. C.; Ferreira, A. L.Made available in DSpace on 2022-04-28T18:53:53Z (GMT). No. of bitstreams: 0 Previous issue date: 1985-12-01; 8 hearts of male and female, white and non-white Brazilians of different ages were studied. The histological arrangement of the collagen and elastic tissue of the leaflets of the left atrioventricular valve was studied. The histological study of the leaflets under polarized light, showed that the collag...
CONSIDERACOES SOBRE OS FATORES COADJUVANTES DOS MECANISMOS DE OCLUSAO E FACILIT...
Orsi, A. M.; Ferreira, A. L.Made available in DSpace on 2022-04-29T08:41:56Z (GMT). No. of bitstreams: 0 Previous issue date: 1975-01-01; The morphological factors that should work to help the cardial continence (oesophageal and gastric mucosal folds) and are arranged to cooperate for the cardial opening (smooth muscle fibres of the longitudinal layer of oesophagus and stomach) are described in the opossum, comparatively to the man. Also ...
MORPHOLOGIE DES CELLULES EPITHELIALES DU CANAL DE L'EPIDIDYME DE L'OPOSSUM (SAR...
Orsi, A. M.; De Mello, V. R.; Ferreira, A. L.; Campos, V. J.M.Made available in DSpace on 2022-04-29T08:42:02Z (GMT). No. of bitstreams: 0 Previous issue date: 1980-01-01; Dept. Morphol., Inst. Biol., Univ. 'Julio de Mesquita Filho', Botucatu
HISTOLOGIE REGIONALE DE L'EPIDIDYME CHEZ L'OPOSSUM SUD AMERICAIN. ETUDE DE MICR...
Orsi, A. M.; Ferreira, A. L.; De Melo, V. R.; Oliveira, M. C.Made available in DSpace on 2022-04-29T08:42:13Z (GMT). No. of bitstreams: 0 Previous issue date: 1981-01-01; Dept. Morphol., Inst. Biol. Botucatu, Univ. 'Julio de Mesquita Filho', Botucatu
Boosting background suppression in the NEXT experiment through Richardson-Lucy ...
Simón, A.; Ifergan, Y.; Redwine, A. B.; Weiss-Babai, R.; Arazi, L.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A. I.; Arnquist, I. J.Submitted to JHEP; Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~$10^{27}$ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns...
Predicting enteric methane production from cattle in the tropics
Ribeiro, R. S.; Rodrigues, J. P.P.; Maurício, R. M.; Borges, A. L.C.C.; Reis e Silva, R.; Berchielli, T. T. [UNESP]; Valadares Filho, S. C.Made available in DSpace on 2021-06-25T11:04:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01; Accurate estimates of methane (CH4) production by cattle in different contexts are essential to developing mitigation strategies in different regions. We aimed to: (i) compile a database of CH4 emissions from Brazilian cattle studies, (ii) evaluate prediction precision and accuracy of extant proposed eq...
Low-diffusion Xe-He gas mixtures for rare-event detection: electroluminescence ...
Fernandes, A. F. M.; Henriques, C. A. O.; Mano, R.D.P.; González-Díaz, D.; Azevedo, C. D. R; Silva, P. A. O. C.; Gomez-Cadenas, J. J.; Freitas, E. D. C.High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC when compared t...
Performance and methane emissions in dairy cows fed oregano and green tea extra...
Kolling, G. J.; Stivanin, S. C. B.; Gabbi, A. M.; Machado, F. S.; Ferreira, A. L.; Campos, M. M.; Tomich, T. R.; Cunha, C. S.; Dill, S. W.Plant extracts have been proposed as substitutes for chemical feed additives due to their potential as rumen fermentation modifiers and because of their antimicrobial and antioxidant activities, possibly reducing methane emissions. This study aimed to evaluate the use of oregano (OR), green tea extracts (GT), and their association as feed additives on the performance and methane emissions from dairy between 28 ...