Clinical experience with quantitative analysis of superficial digital flexor tendon injuries in Thoroughbred and Standardbred racehorses     

R L Genovese  N W Rantanen  B S Simpson  D M Simpson 《Veterinary Clinics of North America: Equine Practice》1990,6(1):129-145

A method to quantitate as well as to document SDFT pathology has been described. This report indicates that computer-assisted evaluation of SDFT damage can improve the accuracy of prognosis in clinical practice. It would appear that a 3.8 severity rating is a limit past which prognosis for successful racing starts to worsen rapidly.  相似文献   

A SIMPLE VOLUMETER     

Simpson WF 《Science (New York, N.Y.)》1945,101(2626):443-444

  相似文献   

The use of ethylene chlorohydrin for breaking the rest period of large quantities of potatoes     

W. F. Porter  G. W. Simpson 《American Journal of Potato Research》1947,24(1):9-14

  相似文献   

ON THE EVIDENCE OF THE UNIONIDAe REGARDING THE FORBER COURSES OF THE TENNESSEE AND OTHER SOUTHERN RIVERS     

Simpson CT 《Science (New York, N.Y.)》1900,12(291):133-136

  相似文献   

Some nutrient dynamics associated with litterfall and litter decomposition in hoop pine plantations of southeast Queensland, Australia     

K. A. Bubb  Z. H. Xu  J. A. Simpson  P. G. Saffigna 《Forest Ecology and Management》1998,110(1-3):343-352

Litterfall was collected over a 12-month period with littertraps in hoop pine (Araucaria cunninghamii) plantations aged 10, 14 and 62 years in southeast Queensland, Australia. The bulk of litterfall occurred during spring, mainly as hoop pine foliage with the annual litterfall ranging between 6.0 and 10.9 t ha⁻¹, respectively, for the younger stands (10 and 14 years) and the mature 62-year old stand. The amount of nitrogen (N) and phosphorous (P) recycled annually through litterfall was lower in the younger stands (28–37 kg N ha⁻¹ and 4.4–5.3 kg P ha⁻¹) compared with that of the mature stand (85 N ha⁻¹ and 6.2 kg P ha⁻¹). The N and P retranslocated during senescence varied across the three stands studied with a trend for N and P retranslocation to increase as availability of soil mineral-N decreased.

Decomposition of the hoop pine foliage component of litter was also studied in the same stands using a litterbag technique and mass-balance analysis. The estimated half-life of hoop pine foliage mass ranged between 1.5 and 1.8 years. Litter-mass loss was strongly correlated with litter substrate quality indicators of N, C, P, C/N ratio, lignin, lignin/N ratio and polyphenols. During the course of the study, there was no difference in litter-mass loss between the stands of different ages. During the 15-month period, the order of element release from the hoop pine litter was K>Na>C>Mg>P, with N, Ca and Mn generally demonstrating varying degrees of net accumulation. During the course of the study, the lignin/C ratio of the hoop pine litter increased from 0.61 to 0.96. This suggested that the litter-C was predominantly in a recalcitrant form and, therefore, the associated N was unlikely to be rapidly released in the hoop pine litter layer.  相似文献   

Failure of osmoregulation with apparent potassium intoxication in marine teleosts: A primary toxic effect of copper     

P.T. Cardeilhac  C.F. Simpson  R.L. Lovelock  S.F. Yosha  H.W. Calderwood  J.C. Gudat 《Aquaculture (Amsterdam, Netherlands)》1979,17(3):231-239

Four sheepshead, Archosargus probatocephalus, weighing 665–980 g were exposed to toxic concentrations (8.5 p.p.m.) of cupric ion (copper) in sea water. Five stages of intoxication of increasing severity, based on behavior and posture, were designated as follows: lethargy; indifference; incoordination; moribundity; death. Serum, gills, liver, and kidneys were taken from fish at different stages of intoxication for examination. Kidneys were congested and swollen, the kidney wt/body wt index increasing up to 13.5 standard deviations (S.D.) over the mean control value. Gill lamellae from copper-poisoned fish were blunt and thickened, capillaries congested, and mucous cells dilated. Livers were similar to controls. Twenty-two clinical values were examined but only serum electrolytes and uric acid levels, liver and gill copper concentrations, kidney weights, and respiratory rates increased in poisoned fish by more than 5 S.D. over mean control values and correlated with the different stages of intoxication. Increased serum potassium, inorganic phosphate, and total intracellular ion values gave highest correlations with severity of intoxication. Potassium levels reached values considered lethal for mammals, and it was concluded that the intoxication following copper poisoning was a potassium intoxication caused primarily by cell damage and failure of osmoregulation by the gills and kidneys.  相似文献   

辐射松引种栽培综述     

毕慧泉  李荣伟  颜红  吴宗兴  蔡诗民 《林业研究》2003,14(4)

辐射松(PinusradiataD.Don)原产于加利弗尼亚海岸,被引种到世界各地,现在是南半球主要的人工林造林树种。1990年以来辐射松被引种到长江上游四川省阿坝州的干旱河谷地区,幼树的成活和早期生长表现良好。本文的主要内容包括:辐射松在原产地和引种地的生长情况,种源和遗传上的差异,环境限制因子和辐射松的气候生境,病虫害,引种不成功的经验教训以及辐射松在生态恢复中的应用。文中还简述了辐射松在阿坝干旱河谷地区的早期生长情况,列举了在长江上游干旱河谷地区引种辐射松可能遇到的问题以及所需开展的研究。图4表5参90。  相似文献   

Scion-rootstock relationships with respect to height growth and foliar concentrations of nitrogen and phosphorus in reciprocal grafts of Pinus caribaea var. hondurensis     

R. J. Haines  J. A. Simpson 《New Forests》1994,8(1):71-79

Both scion and rootstock clones significantly influenced scion elongation and concentrations of nitrogen and phosphorus in the scion foliage. Scion clone was the more important determinant. Scion clone × rootstock clone interactions were not significant. The ability of a clone to elongate as a scion was not correlated with its capacity to promote or retard scion elongation when used as a rootstock. Genetic differences in foliar nutrient concentrations appeared to reflect levels of nutrient demand, rather than the ability of roots to absorb nutrients. Nutrient demand of the rootstock can also explain negative correlations between nitrogen levels in rootstock clones and levels of both nitrogen and phosphorus in the scions. There was no significant relationship between scion elongation and foliar nitrogen concentrations of either rootstock or scion. The weak relationship between scion elongation and concentration of phosphorus in the rootstock apparently resulted from tissue dilution.  相似文献   

Laboratory test for grouping tropical species for kiln drying     

A. de Souza Mendes  W. T. Simpson  S. P. Verrill 《Wood Science and Technology》1995,29(5):353-362

Summary A system was developed for grouping tropical wood species for kiln drying based on similar estimated drying times. Six tropical species were subjected to drying and water soaking tests; variables were test temperature and specimen thickness. Soaking time, specimen thickness, and test temperature were used in an empirical model to predict drying times. The capability of the model to predict drying times was considered acceptable based on an adjusted coefficient of determination equal to 0.929 and an average error of 14 percent. The overall capability of the method proposed for grouping tropical hardwoods for drying is considered promising and worthy of further investigation.  相似文献   

Detection of Clinically Relevant Pain Relief in Cats with Degenerative Joint Disease Associated Pain     

M.E. Gruen  E. Griffith  A. Thomson  W. Simpson  B.D.X. Lascelles 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2014,28(2):346-350

Background

Detection of clinically relevant pain relief in cats with degenerative joint disease (DJD) is complicated by a lack of validated outcome measures and a placebo effect.

Hypothesis/Objectives

To evaluate a novel approach for detection of pain relief in cats with DJD.

Animals

Fifty‐eight client‐owned cats.

Methods

Prospective, double‐masked, placebo‐controlled, stratified, randomized, clinical study. Enrolled cats were 6–21 years of age, with owner‐observed mobility impairment, evidence of pain in at least 2 joints during orthopedic examination, and overlapping radiographic evidence of DJD, and underwent a 2‐week baseline period, 3‐week treatment period with placebo or meloxicam, and 3‐week masked washout period. Outcome measures were evaluated at days 0, 15, 36, and 57.

Results

Both groups significantly improved after the treatment period (day 36) on client‐specific outcome measures (CSOM) and feline musculoskeletal pain index (FMPI) (P < .0001 for both); there was no difference between the groups on CSOM or FMPI score improvement. After the masked washout period, more cats that received meloxicam during the treatment period had a clinically relevant decrease in CSOM score (P = .048) and FMPI score (P = .021) than cats that received placebo.

Conclusions and Clinical Importance

Using both a client‐specific and a general clinical metrology instrument, owners of cats with DJD were able to detect evident recurrence of clinical signs after withdrawal of active medication than after withdrawal of placebo, and that this study design might be a novel and useful way to circumvent the placebo effect and detect the efficacy of pain‐relieving medications.  相似文献