排序方式： 共有23条查询结果，搜索用时 15 毫秒
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Maiara G. Blagitz Fernando N. Souza Camila F. Batista Soraia A. Diniz João Paulo A. Haddad Nilson R. Benites Priscilla A. Melville Alice M. M. P. Della Libera 《Tropical animal health and production》2014,46(1):127-132
The aim of this study was to investigate the relationship between clinical findings and bacterial isolation in milk samples of meat-producing ewes. The study was conducted in 17 commercial flocks and 550 udder halves from suckling Santa Ines ewes. Initially, the clinical examination of the mammary glands and teats was performed by visual inspection and palpation of the teats and udder halves; then a scoring system was devised for all the findings. After that, the strip cup test and the California mastitis test (CMT) were performed. Then, milk samples for somatic cell counts (SCCs) and bacteriological analyses were collected. Staphylococci bacteria were the main etiological agent isolated in the present study. Upon investigation of the correlations between bacterial isolation and the clinical findings, only the presence of teat injury, pendulous udder, and alterations in the palpation of the teat were associated with bacterial isolation. A significant correlation between bacteriologically positive milk samples and CMT and SCC was also found. Thus, some clinical findings appeared as a risk factor for bacteriologically positive milk samples and can be used as a tool in mastitis control programs. However, a complete and extensive diagnosis, an appropriate therapy, and an efficient mastitis control program will require the combination of clinical examination, microbiological tests, and SCC. 相似文献
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William S. Fisher Edgar H. Nilson J.Frank Steenbergen Donald V. Lightner 《Aquaculture (Amsterdam, Netherlands)》1978,14(2):115-140
Six microbial diseases of cultured American lobsters (Homarus americanus) determined to be of significant concern to commercial aquaculture are discussed in relation to present knowledge of characteristics of the causative microorganisms, lobster susceptibility, environmental influence, severity, gross and microscopic recognition, physiological changes, contagion and control. The diseases reviewed here include shell disease, Gaffkemia, microbial epibiont disease, Lagenidium disease, Haliphthoros disease, and Fusarium disease. 相似文献
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Jan Pisek Mait LangTiit Nilson Lauri KorhonenHelen Karu 《Agricultural and Forest Meteorology》2011,151(3):365-377
Methods for analyzing foliage nonrandomness by means of the TRAC instrument, digital hemispheric photography, and a gap fraction model are assessed at two RAMI (RAdiation transfer Model Intercomparison) mature stands in Järvselja, Estonia. The six different methods involve calculation of the canopy element clumping index, at scales coarser than that of a shoot. The major aim was to define the merits and limitations of the various methods. We conclude the gap size distribution and beyond-shoot clumping is very stable across the stands for the solar zenith angle range from 30° to 60°. Estimates based on the gap size distribution and the combination of gap size and logarithm methods performed the best while compared with an independent gap fraction model. We clarify the effect of the assumed leaf inclination angle distribution on gap size distribution and differences between estimates of beyond-shoot clumping. We show that the modified, gap-size distribution based method of Chen and Cihlar can provide reliable beyond-shoot clumping estimates without any a priori assumptions about the total gap fraction, segment length or the leaf inclination angle distribution. We also illustrate the changes in element clumping with measurement height. The compiled data extend the original parameter dataset to be used in the next phase of RAMI for different benchmark tests and reflectance modeling experiments, and contribute toward systematic validation efforts of radiative transfer models, operational algorithms, and field instruments, as promoted by the Committee on Earth Observation Satellites (CEOS). 相似文献
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St Leger JA Righton AL Nilson EM Fascetti AJ Miller MA Tuomi PA Goertz CE Puschner B 《Journal of zoo and wildlife medicine》2011,42(1):98-104
Vitamin A deficiency has rarely been reported in captive or free-ranging wildlife species. Necropsy findings in two captively housed southern sea otters (Enhydra lutris nereis) included irregular thickening of the calvaria characterized by diffuse hyperostoses on the internal surface. One animal also had moderate squamous metaplasia of the seromucinous glands of the nose. There was no measurable retinol in the liver of either sea otter. For comparison, hepatic retinol concentration was determined for 23 deceased free-ranging southern and northern (Enhydra lutris kenyoni) sea otters from California and Alaska. Free-ranging otters were found to have similar hepatic retinol concentrations (316 +/- 245 mg/kg wet weight) regardless of their location and subspecies. All of these values were significantly higher than the levels in the affected animals. Consumption of a diet with very low vitamin A concentrations and noncompliance in daily supplementation are hypothesized as the causes of vitamin A deficiency in these two sea otters. 相似文献
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Tais Aleriana Lucon Wagemaker Cássia Regina Limonta Carvalho Nilson Borlina Maia Sueli Regina BaggioOliveiro Guerreiro Filho 《Industrial Crops and Products》2011,33(2):469-473
Coffee is a much enjoyed beverage because of its unique flavor and taste characteristics. The lipid fraction of coffee beans, composed of wax, oil and unsaponifiable matter, prevents volatilization and loss of flavor during the roasting process. The lipid fraction extracted from green beans is high in linoleic acid and has an ultraviolet absorption. These properties that can be very useful and suitable for cosmetic products such as skin moisturizers and sunscreens. The aim of this study was to characterize the lipid fraction and to determine the sun protection factor of 10 species of Coffea. Significant variability was found for all the parameters investigated: the wax content varying between 0.0 and 2.8%, the oil content ranging from 6.9% to 32.4%, unsaponifiable matter from 0.3% to 13.5% and the sun protection factor from 0.0 to 4.1. Fatty acids widely used in the cosmetics industry, such as linoleic and oleic acid were found to be present in excellent proportion. 相似文献
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Leal Murilo Henrique Souza Zeist André Ricardo Rodrigues Júnior Nilson Silva Júnior André Dutra Arantes José Henrique Verhalem Garcia Neto Jair de Pieri Julia Roberta Sanches Perrud Amanda Carvalho 《Journal of Crop Science and Biotechnology》2021,24(3):349-360
Journal of Crop Science and Biotechnology - Sweet potato (Ipomoea batatas L.) is a root that allows healthy eating and combats malnutrition. There is a need for more productive sweet potato... 相似文献
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An astronomical digital camera is equipped with a fish-eye lens and exchangeable filters to study the fine angular structure of radiation field in forests in the red and near infrared (NIR) spectral bands. A few examples of the angular distribution of downward radiances in conifer and broadleaf forests are given. The results of field measurements are compared with the spectral flux measurements by a field radiometer and with the calculations of radiance by a combined geometric-optical/radiative transfer (RT) model. The test measurements demonstrated that the hemispheric-view imaging radiometer is a good tool to validate canopy RT models. 相似文献