Prototype agricultural land evaluation systems for Canada: I. Overview of systems development     

K. B. MacDonald  M. Brklacich 《Soil Use and Management》1992,8(1):1-7

Abstract. Information on land resources and the capacity of land to support agricultural production is a prerequisite for the formation of sound agricultural policies. This paper summarizes Canadian experiences in developing national and regional land evaluation systems. Potential users expected the system to estimate the degree to which changes in biophysical and socio-economic conditions would alter options for land use and production, and to provide a context for more detailed analysis.
A broad-scale land evaluation system was designed to serve the needs identified by representative user groups. Two prototype systems were developed from available information to test the major features of the system design. Neither prototype was complete; one was national in extent and capable of addressing issues of national and provincial importance, the other covered a sub-provincial area but allowed for more detailed evaluation of the effects of soil modifying processes. A full range of applications was demonstrated using one or other of the prototype systems. As a result of this project, the broad-scale land evaluation system design was improved and verified, ongoing research and data collection activities were adjusted to ensure that they meet the needs of a macroscale land evaluation system, and approaches were developed to overcome problems of land evaluation system development.  相似文献   

Pharmacokinetics of the anticonvulsant levetiracetam in neonatal foals          下载免费PDF全文

K. D. MacDonald  K. A. Hart  J. L. Davis  L. J. Berghaus  S. Giguère 《Equine veterinary journal》2018,50(4):532-536

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Catheter‐associated venous air embolism in hospitalized horses: 32 cases          下载免费PDF全文

Nicholas J. Parkinson  Harold C. McKenzie  Michelle H. Barton  Jennifer L. Davis  Bettina Dunkel  Amy L. Johnson  Elizabeth S. MacDonald 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(2):805-814

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Hepatotoxicosis in cattle associated with consumption of Punica granatum (pomegranate)          下载免费PDF全文

MH Hawes  IJ Gill 《Australian veterinary journal》2018,96(10):408-410

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Effect of Pimobendan in Dogs with Preclinical Myxomatous Mitral Valve Disease and Cardiomegaly: The EPIC Study—A Randomized Clinical Trial          下载免费PDF全文

A. Boswood  J. Häggström  S.G. Gordon  G. Wess  R.L. Stepien  M.A. Oyama  B.W. Keene  J. Bonagura  K.A. MacDonald  M. Patteson  S. Smith  P.R. Fox  K. Sanderson  R. Woolley  V. Szatmári  P. Menaut  W.M. Church  M. L. O'Sullivan  J.‐P. Jaudon  J.‐G. Kresken  J. Rush  K.A. Barrett  S.L. Rosenthal  A.B. Saunders  I. Ljungvall  M. Deinert  E. Bomassi  A.H. Estrada  M.J. Fernandez Del Palacio  N.S. Moise  J.A. Abbott  Y. Fujii  A. Spier  M.W. Luethy  R.A. Santilli  M. Uechi  A. Tidholm  P. Watson 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(6):1765-1779

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Proximal interphalangeal joint arthrodesis in 34 horses using two parallel 5.5-mm cortical bone screws     

MacLellan KN  Crawford WH  MacDonald DG 《Veterinary surgery : VS》2001,30(5):454-459

OBJECTIVE: To report clinical experience with arthrodesis of the proximal interphalangeal joint in horses using two parallel 5.5-mm cortical bone screws placed in lag fashion. STUDY DESIGN: Retrospective, clinical study. ANIMALS: Thirty-four horses, aged 1 to 19 years. METHODS: Medical records for all horses admitted (1991-1997) for pastern arthrodesis using two 5.5-mm ASIF cortical bone screws, in parallel orientation, and placed in lag fashion by use of a combined aiming device to facilitate accuracy were reviewed. Signalment, lameness diagnosis, duration of lameness, limb(s) involved, and outcome were recorded. Criteria for successful outcome were determined as return to previous level of function or future intended athletic use. RESULTS: Thirty-nine proximal interphalangeal joint arthrodeses were performed on 34 horses. One horse was euthanatized in the recovery room and was excluded from data analysis. Successful outcome occurred in 85% of frontlimbs and 89% of hindlimbs. Failure occurred in 5 joints; 1 horse had lameness directly associated with surgery, whereas 4 horses had unrelated lameness. CONCLUSION AND CLINICAL RELEVANCE: Age, breed, and initial disease did not affect outcome. Arthrodesis of the proximal interphalangeal joint by use of two 5.5-mm ASIF cortical bone screws, in parallel orientation, placed in lag fashion by use of a combined aiming device, resulted in sound use of the limb in >85% of the joints with shortened postoperative coaptation.  相似文献   

Enthusiasm is contagious.          下载免费PDF全文

D MacDonald 《The Canadian veterinary journal. La revue veterinaire canadienne》1995,36(7):408-409

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Hemoglobin Levels of Piglets at Birth and at 21 Days and Their Relation to Weight at 154 Days of Age          下载免费PDF全文

D. G. Dale  M. A. MacDonald    J. E. Moxley 《Canadian journal of veterinary research》1961,25(8):193-197

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Animal Nursing—Parts I and II          下载免费PDF全文

D. S. MacDonald 《The Canadian veterinary journal. La revue veterinaire canadienne》1967,8(5):123

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Characterization of lipoproteins in cerebrospinal fluid of mares during pregnancy and lactation     

Puppione DL  MacDonald MH 《American journal of veterinary research》2002,63(6):886-889

OBJECTIVE: To measure apolipoproteins in cerebrospinal fluid (CSF) from healthy mares and to determine whether CSF concentrations of apolipoproteins change during pregnancy and lactation. ANIMALS: 5 healthy pregnant mares. PROCEDURE: 2 sets of CSF samples were obtained; initial samples were obtained 10 to 30 days before parturition (mean, 18 days; median, 17 days), and second samples were obtained 19 to 26 days after parturition (mean, 23 days; median, 23 days). Cerebrospinal fluid was collected from the lumbosacral subarachnoid space of standing horses by use of routine collection techniques. Cerebrospinal fluid cholesterol concentrations were measured by use of a sensitive enzymatic assay. Ultracentrifugal fractions of CSF lipoproteins were characterized by determining the distribution of apolipoproteins, using polyacrylamide gel electrophoresis. RESULTS: Analyses of isolated ultracentrifugal fractions by polyacrylamide gel electrophoresis revealed 2 apolipoproteins, with the expected molecular weights for apolipoprotein E and apolipoprotein A-I. No significant differences were observed between pre- and postpartum values in mares. The concentration of cholesterol in CSF fluid of mares was comparable to values reported in other mammals. CONCLUSIONS AND CLINICAL RELEVANCE: Apolipoprotein E in CSF of horses is a major apolipoprotein associated with high-density lipoproteins, which is similar to findings in other mammals. Additional characterization of the role of apolipoproteins in mammalian CSF may provide critical insight into various degenerative neurologic disease processes.  相似文献