Locally invasive melanoma in the internal laminae of the hoof of a bay mule     

G. Kay  P. McNeil  D. Knottenbelt  N. Tligui 《Equine Veterinary Education》2020,32(2):66-70

An 8-year-old bay mule was presented with moderate right forelimb lameness and dark discolouration of the white line. Histopathology of the dark material indicated a melanoma. Extensive resection and debridement were not curative and the mule was subjected to euthanasia 70 days after presentation.  相似文献   

Metastatic aortic body tumour causing neck pain in a dog   总被引：1，自引：0，他引：1  

J. J. Callanan †  P. E. McNeil  T. J. Anderson  H. Laird 《The Journal of small animal practice》1991,32(10):525-528

An aortic body tumour in an 11-year-old male Jack Russell terrier with acute onset neck pain is described. Clinical signs were related to a metastatic lesion present in the spinal column and involving the vertebral body of the fifth cervical vertebra. Radiographic and post mortem findings are described including histopathologi-cal features of the tumour and ultrastructural observations.  相似文献   

Atlanto-occipital fusion and ataxia in the calf     

J S Boyd  P E McNeil 《The Veterinary record》1987,120(2):34-37

Atlanto-occipital fusion is a rare bony anomaly due to the failure of the developing arches of the first cervical vertebra to separate from the occiput. It may be associated with compressive myelopathy and must therefore be considered in the differential diagnosis of ataxia in the young animal. This report reviews the embryological development of the region and reports the findings in two cases of fusion in the calf.  相似文献   

Graduate students' views on unionization     

Castellanos M  Holland-Minkley AM  MacKenzie AB  McNeil AJ  Toomey D 《Science (New York, N.Y.)》2003,299(5605):345-346

  相似文献   

Allometric equations for urban ash trees (Fraxinus spp.) in Oakville,Southern Ontario,Canada     

Paula J. Peper  Claudia P. Alzate  John W. McNeil  Jalil Hashemi 《Urban Forestry & Urban Greening》2014,13(1):175-183

Tree growth equations are an important and common tool used to effectively assess the yield and determine management practices in forest plantations. Increasingly, they are being developed for urban forests, providing tools to assist urban forest managers with species selection, placement, and estimation of management costs and ecosystem services. This study describes the development of allometric equations for Fraxinus americana and F. pennsylvanica growing in Oakville, Canada. With data collected from 103 ash trees, five allometric models were tested to develop equations estimating diameter-at-breast-height (dbh), tree height, crown width and crown height, using age and dbh as explanatory variables. Mean annual growth rates are presented to demonstrate species growth performance and were not significantly different over the first 40 years of growth for the two species. Of all the tested random coefficient models for both species, the cubic with weight 1/x provided the best fit for estimating dbh from age. The best models for other parameters were the loglog for crown height from dbh, the quadratic for crown diameter from dbh, and the linear for tree height from dbh for F. americana. Model types showed more consistency for F. pennsylvanica with linear providing the best fit for crown diameter, crown height and tree height from dbh. The number of model types suggests the difficulty of fitting any single model to the vast array of conditions affecting plant growth in urban areas where management practices and environment can significantly influence tree size and growth. These models may be used to estimate the growth of ash tree populations in Oakville and communities with similar climate, soil, planting, and management environments.  相似文献   

Comparison of Five Digestion Procedures for Recovery of Nutrients and Trace Elements in Plant Tissue     

Valtcho D. Zheljazkov  Paul McNeil 《Journal of plant nutrition》2013,36(11):1937-1946

Comparison of five digestion procedures for recovery of nutrients and trace elements in plant tissue were examined. The objectives of this study were to compare five digestion procedures: AOAC (dry ashing), two nitric acid, (NA1, commonly used and NA2, our modification), and two aqua regia (AR1, commonly used and AR2, our modification) procedures for recovery of 15 plant nutrients and trace elements in corn, swiss chard, thorn apple, and barley flour (certified material). Generally, the recovery of various elements depended on the digestion procedure used and the plant species. In most instances, NA2 recovered more phosphorus (P), potassium (K), sulfur (S), and manganese (Mn) than the AOAC or the two AR procedures. Also, overall NA2 recovered more K and magnesium (Mg) than NA1. Extractants AR1 and AR2 recovered more iron (Fe) than the two NA procedures, and the same as the AOAC. The AR2 recovered very similar concentrations of nutrients as the AOAC; and in corn tissue, AR2 recovered more zinc (Zn), chromium (Cr), nickel (Ni), copper (Cu), and boron (B) than the AOAC. The AOAC recovered less S and B than the other procedures tested. For instance, in barley flour, AOAC recovered eight to nine times less S, while in corn tissue AOAC recovered around three times less S than the NA procedures. Overall, there are three important findings: (1) NA procedures may be used for recovery of most elements in plant tissue; (2) AR2 procedure is comparable to the official AOAC method for recovery of nutrients and trace elements in plant tissue, and (3) the official AOAC method used in Canadian plant testing laboratories may underestimate the concentration of S and B in plant tissue.  相似文献   

Modelling net photosynthetic rate of field-grown cocksfoot leaves under different nitrogen, water and temperature regimes   总被引：4，自引：0，他引：4  

P. L. Peri  D. J. Moot  D. L. McNeil  A. C. Varella  & R. J. Lucas 《Grass and Forage Science》2002,57(1):61-71

A simple multiplicative model using temperature, foliage nitrogen (N) concentration and water status was developed to predict the maximum photosynthetic rate (Pmax) of field‐grown cocksfoot (Dactylis glomerata L.) leaves when none, one, two or all the factors were limiting. The highest Pmax was 27·4 μmol CO₂ m^–2 s^?1 in non‐limited conditions, which was defined as the standardized Pmax value dimensionless (Pmax_s=1). Pmax_s increased 0·058 units per °C from 10°C to the optimum range (19–23°C) (Pmax_s=1) and then declined 0·077 units of Pmax_s per °C from 23 to 31°C. Pmax_s=1 was also measured from 59 to 52 g N kg^?1 dry matter (DM) foliage N. Pmax_s then decreased at the rate of 0·115 units per 10 g N kg^?1 DM from 52 to 26 g N kg^?1 DM, and 0·409 units of Pmax_s per 10 g N kg^?1 DM from 26 to 15 g N kg^?1 DM. For predawn leaf water potential (ψ_lp), Pmax_s=1 was measured from ?0·1 to ?1·2 bar but declined linearly at a rate of 0·078 units per bar of ψ_lp from ?1·2 to ?14·0 bar because of a linear decrease in stomatal conductance. An interaction between low N content (≤20 g N kg^?1 DM) and high temperature (>23°C) was also detected. Together, this multiplicative model accounted for 0·82 of the variation in Pmax_s.  相似文献   

Phylogenetic relationships in Lens species and their interspecific hybrids as measured by morphological characters     

Maqbool Ahmad  David L. McNeil  J. Richard Sedcole 《Euphytica》1997,94(1):101-111

Phylogenetic relationships of 15 genotypes of the genus Lens and 7 of their interspecific hybrids were determined by morphological (quantitative and qualitative) characters. The first multivariate analysis was conducted on quantitative characters and second analysis was conducted on qualitative characters. In the first analysis on the basis of two canonical variates, accessions of Lens nigricans, L. odemensis and L. culinaris ssp. orientalis grouped together, while L. ervoides and L. culinaris ssp. culinaris formed two different groups. The second analysis yielded different results based firstly on two canonical variates where L. nigricans and L. culinaris ssp. culinaris formed two separate groups but the other three (sub)species clustered together when the third canonical variate was included. L. odemensis separated from this larger group and formed a separate group. The phylogenetic relationships of parents and their hybrids have also been discussed. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Identification and genetic characterization of different resistance sources to ascochyta blight within the genus Lens   总被引：2，自引：0，他引：2  

M. Ahmad  A.C. Russell  D.L. McNeil 《Euphytica》1997,96(3):311-315

The self-incompatibility mechanism in 10 local radish cultivars was investigated through seed set analysis and pollen tube growth behavior. The objective was to identify self-incompatible local radish lines for hybrid seed production. Based on a seed set ratio as an estimate for self-incompatibility, cultivars Tangail Local, Tasaki, Kuni, Aushi and Indian Aushi were identified as self-compatible. An intermediate seed ratio was observed in ‘Red Mollika’, ‘Pinky’ and ‘Red Bongi’. Moderately strong self-incompatibility was observed in ‘Red Kalpin’ and ‘Kuni White’. Pollen tube growth behavior revealed that self-incompatible lines had a relatively lower number of germinated pollen grains per stigma and pollen tubes per style than those of self-compatible lines. The two self-incompatibility test methods gave comparable results. None of the cultivars under study was found to be fully self-incompatible. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Anthropogenic CO2 uptake by the ocean based on the global chlorofluorocarbon data set     

McNeil BI  Matear RJ  Key RM  Bullister JL  Sarmiento JL 《Science (New York, N.Y.)》2003,299(5604):235-239

We estimated the oceanic inventory of anthropogenic carbon dioxide (CO2) from 1980 to 1999 using a technique based on the global chlorofluorocarbon data set. Our analysis suggests that the ocean stored 14.8 petagrams of anthropogenic carbon from mid-1980 to mid-1989 and 17.9 petagrams of carbon from mid-1990 to mid-1999, indicating an oceanwide net uptake of 1.6 and 2.0 +/- 0.4 petagrams of carbon per year, respectively. Our results provide an upper limit on the solubility-driven anthropogenic CO2 flux into the ocean, and they suggest that most ocean general circulation models are overestimating oceanic anthropogenic CO2 uptake over the past two decades.  相似文献