What is your diagnosis? Calcium crystal deposition disease (chondrocalcinosis)     

Kirkby KA  Collins KE  Newell SM  Ginn PE  Lewis DD 《Journal of the American Veterinary Medical Association》2004,225(9):1335-1336

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Plant-derived enzyme inhibitors and lectins for resistance against plant-parasitic nematodes in transgenic crops     

Paul R. Burrows  Anthony D. P. Barker  Christine A. Newell  William D. O. Hamilton 《Pest management science》1998,52(2):176-183

Due to increasing restrictions on the use of toxic and expensive nematicides, there is now a greater than ever need for crop cultivars that are resistant to plant-parasitic nematodes. Genetically engineered nematode resistance is not as well developed as other engineered traits but, even so, the first genetically modified plants with enhanced nematode resistance have been produced and tested. Plant-derived enzyme inhibitor and lectin genes are being evaluated for their ability to confer broad-spectrum nematode resistance in transgenic crop plants. Early indications are that these are likely to be effective. Gene pyramiding has potential to increase field durability and to widen the spectrum of nematodes controlled by any one transgenic line. © 1998 SCI.  相似文献   

Hepatic lipidosis and other test findings in two captive adult porcupines (Erethizon dorsatum) dying from a "sudden death syndrome".     

Robert Barigye  Ev Schamber  Teresa K Newell  Neil W Dyer 《Journal of veterinary diagnostic investigation》2007,19(6):712-716

Routine postmortem examination and histologic evaluation of tissue sections demonstrated hepatic lipidosis (HL) in 2 adult captive porcupines with a history of sudden death. The male porcupine had a markedly enlarged pale liver that microscopically showed large unilocular vacuoles within hepatocellular cytoplasm. The periparturient female had similar but less marked hepatic lesions and an incidental pulmonary mycosis. These findings suggest HL as an important differential of spontaneous death in captive porcupines. It is hypothesized that in addition to the widely documented causes, HL in captive porcupines may be specifically associated with nutritional imbalances caused by the feeding of unsuitable commercial diets. The possible association of the condition with dietary and other factors in captive porcupines needs to be thoroughly investigated.  相似文献   

Marine Planation of Tropical Limestone Islands     

Newell ND 《Science (New York, N.Y.)》1960,132(3420):144-145

Geological studies in the western Atlantic indicate that sea level is now near its highest position since the Pleistocene, and that intertidal erosion at this level has been negligible. The evidence conflicts with the idea that many coral reefs were recently planed down from a higher stand of the sea.  相似文献   

Space Science: The future holds exciting possibilities for scientific research by man in space     

Newell HE 《Science (New York, N.Y.)》1963,139(3554):464-471

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Comparison of the radius of curvature of the ulnar trochlear notch of Rottweilers and Greyhounds     

Collins KE  Cross AR  Lewis DD  Zapata JL  Goett SD  Newell SM  Rapoff AJ 《American journal of veterinary research》2001,62(6):968-973

OBJECTIVE: To compare radius of curvature along the ulnar trochlear notch of Rottweilers and Greyhounds to determine whether morphologic differences exist that may contribute to the cause and pathogenesis of fragmented coronoid process in Rottweilers. SAMPLE POPULATION: Paired elbow joints from 13 Rottweilers and 14 Greyhounds. PROCEDURE: Elbow joints were radiographically scored on the basis of severity of osteoarthritic lesions. The articular contour of each ulnar trochlear notch was digitized. The radius of curvature at defined points along the ulnar trochlear notch was compared between breeds. RESULTS: Radius of curvature of the ulnar trochlear notch was not a constant function of arc length in either breed but had a consistent characteristic appearance in both breeds. Radius of curvature was greatest at each end of the ulnar trochlear notch and had 2 peaks in the midportion of the notch in both breeds. These peaks occurred farther distally in the notch and were larger in Rottweiler ulnae than Greyhound ulnae. A significant difference in mean radius of curvature was detected between breeds at these peaks. Greyhounds had significantly greater mean radius of curvature at the end of the medial coronoid process, compared with Rottweilers. CONCLUSIONS AND CLINICAL RELEVANCE: Radius of curvature of the ulnar trochlear notch is a complex function of arc length in Rottweilers and Greyhounds. The waveform has a consistent characteristic appearance in both breeds. Although significant differences were identified between breeds, associations between these differences and cause or pathogenesis of fragmented coronoid process in Rottweilers were not apparent.  相似文献   

Theriogenology question of the month. Pyometra, hydrometra, or mucometra     

von Reitzenstein M  Archbald LF  Newell SM 《Journal of the American Veterinary Medical Association》2000,216(8):1221-1223

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LETTERS     

Nola Lester  BVMS  Greg Roberts  DVM  Susan Newell  DVM  John Graham  MVB 《Veterinary radiology & ultrasound》2000,41(4):381-387

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Evaluation of the Rate of Evolution in Natural Populations of Guppies (Poecilia reticulata)     

DN Reznick  FH Shaw  FH Rodd  RG Shaw 《Science (New York, N.Y.)》1997,275(5308):1934-1937

Natural populations of guppies were subjected to an episode of directional selection that mimicked natural processes. The resulting rate of evolution of age and size at maturity was similar to rates typically obtained for traits subjected to artificial selection in laboratory settings and up to seven orders of magnitude greater than rates inferred from the paleontological record. Male traits evolved more rapidly than female traits largely because males had more genetic variation upon which natural selection could act. These results are considered in light of the ongoing debate about the importance of natural selection versus other processes in the paleontological record of evolution.  相似文献   

Inter-regional comparison of patterns and trends in surface water acidification across the United States     

Avis D. Newell 《Water, air, and soil pollution》1993,67(3-4):257-280

Temporal trends in acid-base chemistry are reported for surface waters in 6 regions of the United States. The lakes and streams are low ANC, dilute systems, selected to represent acid-sensitive aquatic resources in the 6 regions. The predominant trends observed were decreases in lake and stream SO₄ ^2? concentrations in sites east of the Mississippi River, and increases in NO₃ ^? in the Adirondack lake and Catskill stream sites (both located in eastern New York State). Correlations of trend results from all sites with other factors indicated that trends in precipitation volume were highly correlated with the observed trend patterns. From the surface water trend results, three distinct clusters were identified that corresponded to three trend patterns: ‘dilution,’ ‘recovery,’ and ‘acidification.’ These were distributed across the LTM regions, with no particular geographic patterns.  相似文献