Buffy coat smear or Knott's test: which to choose for canine microfilaria screening in field studies?          下载免费PDF全文

Ricardo Marcos  Cristina Pereira  Marta Santos  Camilla Luzzago  Stefania Lauzi  João P. Maia  Augusto Faustino  Pablo Puente‐Payo 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2016,45(1):201-205

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Nitrogen metabolism,digestive parameters,and protein requirements for the maintenance of buffalo growth     

Erica Machado  Emerson Henri Yoshimura  Nadine Woruby Santos  Bruna Calvo Agustinho  Lucelia de Moura Pereira  Rafael Barreiros Samensari  Silvia Cristina de Aguiar  Lucia Maria Zeoula 《Tropical animal health and production》2016,48(2):361-366

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New approaches for morphological diagnosis of bovine Eimeria species: a study on a subtropical organic dairy farm in Brazil     

Mônica Mateus Florião  Bruno do Bomfim Lopes  Bruno Pereira Berto  Carlos Wilson Gomes Lopes 《Tropical animal health and production》2016,48(3):577-584

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Intake and ingestive behavior in lambs fed low-digestibility forages     

Antônio E. Filho  Gleidson G. P. Carvalho  Aureliano J. V. Pires  Robério R. Silva  Paulo E. F. Santos  Rogério M. Murta  Fabiano M. Pereira  Bruna M. A. Carvalho  Camila M. A. Maranhão  Luana M. A. Rufino  Stefanie A. Santos  Douglas S. Pina 《Tropical animal health and production》2016,48(7):1315-1321

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Total replacement of corn by mesquite pod meal considering nutritional value,performance, feeding behavior,nitrogen balance,and microbial protein synthesis of Holstein-Zebu crossbred dairy steers     

Gláucia Sabrine de Oliveira Moraes  Evaristo Jorge Oliveira de Souza  Antonia Sherlânea Chaves Véras  Marina de Paula Almeida  Márcio Vieira da Cunha  Thaysa Rodrigues Torres  Camila Sousa da Silva  Gerfesson Felipe Cavalcanti Pereira 《Tropical animal health and production》2016,48(7):1415-1420

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Characterizing the setting of cement when mixed with cork, blue gum, or maritime pine, grown in Portugal I: temperature profiles and compatibility indices     

Catarina Pereira  Fernando Caldeira Jorge  Mark Irle  José Maria Ferreira 《Journal of Wood Science》2006,52(4):311-317

Data are presented on the effects that cork, blue gum, or maritime pine, all grown in Portugal, have on cement setting. These materials were mixed with cement either without any treatment or after being extracted previously with a range of solvents (ranging from nonpolar to very polar). Other experiments were carried out in which extractives or calcium chloride were added to the cement paste. All lignocellulosic substrates have detrimental effects on cement setting, which is mostly seen by a delay in attaining the maximum temperature in the process. However, the addition of calcium chloride was able to overcome this disadvantage. Extraction of the substrates with some polar extraction agents before addition to the cement paste only slightly improved compatibility, and the addition of water-based extractives to a cement paste affects the setting much less than the lignocellulosic material by itself. Several thermal compatibility indices, including a new index proposed in this article, were calculated from data taken from temperature profiles, and conclusions are presented on the performance of the setting systems, as compared with a neat cement paste. In addition, comments are expressed on the level of accuracy offered by the indices applied in this study, and how such accuracy can be checked or improved by matching them to the physical properties of the wood-cement composites.  相似文献   

The thermochemical degradation of cork     

Prof. Helena Pereira 《Wood Science and Technology》1992,26(4):259-269

Summary The thermochemical degradation of cork from Quercus suber L. was studied in the temperature range 150°C–450°C in relation to mass loss, chemical composition and the influence on the cellular structure. The degradation of cork is strongly dependent on temperature and mass losses become significant at 200°C (15% of initial dry weight) and increase rapidly for higher temperatures (27% at 250 °C, 49% at 300 °C, 62% at 350 °C) until ashing at 450 °C. The polysaccharides are the most heat sensitive components: at 200 °C, hemicelluloses disappear and cellulose is degraded to a considerable extent. Suberin is more resistant and degradation starts at approx. 250 °C; 300 °C-treated samples only contain 7% suberin.The cellular structure of cork is also significantly influenced by temperature. Upon heating, cells expand and the cell walls stretch, attaining at 250 °C a maximum cell volume increase corresponding to a factor of approximately 2. Above 300 °C, the structure of cell walls is considerably changed and show profound physical damage; in the later stages of pyrolysis, a cellular structure is no longer observed.We are grateful to Mrs. Joaquina Ferreira for her help with the chemical analysis. The research was financially supported by the Junta Nacional de Investigação Científica e Tecnológica (JNICT) and by the Instituto de Ciência e Tecnologia dos Materiais (ICTM)  相似文献   

Leaf growth of Eucalyptus globulus seedlings under water deficit     

Metcalfe JC  Davies WJ  Pereira JS 《Tree physiology》1990,6(2):221-227

Eucalyptus globulus Labill. seedlings grown under field conditions in Portugal were watered either daily (control) or every 6 days (drought-treated). Relative to those of control plants, rates of leaf production and leaf biomass accumulation were reduced by almost half in drought-treated plants. However, whereas expansion of new leaves on control plants slowed toward the end of the 30 day experiment, expansion of leaves of the same age on drought-treated plants accelerated as a change in weather conditions resulted in midday plant water potentials above -3.0 MPa. In plants that were left unwatered until they wilted and were then watered daily, expansion of the fifth leaf pair from the apex was slower than that of the same pair of leaves of plants watered daily throughout; but it continued for about twice as long and resulted in the same final leaf area. Drought treatment also caused a substantial reduction in the rate of leaf production, which, in part, accounted for the effect of drought on leaf biomass production. In a greenhouse study, witholding water for 15 days had only a slight effect on the length or width of adaxial epidermal cells, and the effect was quickly reversed on rewatering.  相似文献   

Modeling the continuous hot-pressing of MDF     

Celeste Pereira  Luisa M. H. Carvalho  Carlos A. V. Costa 《Wood Science and Technology》2006,40(4):308-326

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Heartwood and sapwood variation in Eucalyptus globulus Labill. trees at the end of rotation for pulp wood production     

Maria C. Morais  Helena Pereira 《Annals of Forest Science》2007,64(6):665-671

The amount of heartwood and sapwood in Eucalyptus globulus Labill. wood was determined in commercial pulpwood plantations at harvest age (12 to 15 years) in four ites in central portugal. twelve trees were sampled in each site at nine stem height levels. Heartwood was present in all the trees up to 82%–87% of the total tree height and amounted to 38%–41% of the total tree volume. The heartwood proportion in the stem cross-section decreased from the base upwards, representing 53.3% and 26.1% of the total area respectively at the base and 55% height level. The sapwood width remained relatively constant along the stem at a mean 38 mm up to the 55% height level. The trees within the site, the height level and their interaction were highly significant sources of variation for heartwood proportion and sapwood width. The heartwood diameter and sapwood width were positively correlated with radial tree growth.  相似文献