Retention,absorption, translocation and distribution of sethoxydim in monocotyledonous and dicotyledonous plants*     

J. R. CAMPBELL  D. PENNER 《Weed Research》1987,27(3):179-186

Quackgrass [Elymus repens (L.) Gould =Agropyron repens (L.) Beauv.] and barnyardgrass [Echinochloa crus-galli (L.) Beauv.] were more than one hundred times more susceptible to sethoxydim than alfalfa (Medicago sativa L. 'Saranac') or navybean (Phaseolus vulgaris L. 'Seafarer'). Uptake of sethoxydim From soil following post-emergence applications caused negligible reduction in E. crus-galli fresh weight. More than 80% of foliar-applied ¹⁴C-sethoxydim was absorbed within 6 h in all species. Translocation occurred in all species with accumulation of ¹⁴C in rapidly growing plant tissues. Translocation to the roots was less than 8% of total in all species. Most of the extracted ¹⁴C initially partitioned into an ethyl acetate-soluble fraction. The proportion of ¹⁴C in the ethyl acetate-soluble fraction decreased with time with a concomitant increase of that in the insoluble fraction. Differences in the quantity of ¹⁴C in the ethyl acetate-soluble fraction did not account for the observed selectivity.  相似文献   

Auricular fibrillation in horses     

DONALD DE  ELLIOTT FJ 《The Veterinary record》1948,60(40):473

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Regional Variation in Occupational Plans among High-School Seniors     

DONALD W. BOGIE 《Growth and change》1977,8(3):47-52

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A Technique for Defining Subareas for Regional Analysis     

DAVID A. GANSNER  DONALD W. SEEGRIST  GERALD S. WALTON 《Growth and change》1971,2(4):20-24

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The Case for a Gross State Product Series     

DONALD RATAJCZAK  ROBERT M. WILLIAMS 《Growth and change》1972,3(2):29-31

Regional economists in search of data by state usually turn first to Washington. There they are generously served in the tasteful surroundings of the U.S. Department of Commerce. Sometimes they come away hungry, however. Two data consumers at the Graduate School of Management, UCLA, believe that a gross state product series should be added to the menu. They are respectively Lecturer in Business Economics and Professor of Business Economics and Statistics. Dr. Williams is also Director of the UCLA Business Forecasting Project.  相似文献   

CLINICAL, MAGNETIC RESONANCE, AND SONOGRAPHIC IMAGING FINDINGS IN HORSES WITH PROXIMAL PLANTAR METATARSAL PAIN     

RAPHAEL LABENS  MICHAEL C. SCHRAMME  IAN D. ROBERTSON  DONALD E. THRALL  W. RICH REDDING 《Veterinary radiology & ultrasound》2010,51(1):11-18

Sonography is commonly used for diagnosis of desmopathy of the proximal part of the suspensory ligament in horses. However, magnetic resonance (MR) imaging has been stated to be superior for detecting disease and localizing lesions. In this retrospective study of 39 horses or 46 hind limbs with lameness due to proximal plantar metatarsal pain, the clinical and diagnostic findings are discussed and sonography and MR imaging compared for examination of the proximal part of the suspensory ligament. With MR imaging interpreted as the clinical gold standard, desmopathy of the proximal part of the suspensory ligament was diagnosed in 21 hind limbs, proximal plantar metatarsal pain of unknown cause in 12, an osseous injury at the origin of the suspensory ligament in four and a condition unrelated to the suspensory ligament in nine. Based on these findings, sonography had a sensitivity of 0.77 and 0.66 and specificity of 0.33 and 0.31 for diagnosing proximal suspensory desmopathy and for accurately localizing lesions, respectively. MR imaging changes consistent with proximal suspensory desmopathy were signal hyperintensities and an increase in cross-sectional area compared with the contralateral limb. Anesthesia of the deep branch of the lateral plantar nerve is not specific neither for proximal suspensory desmopathy, as conditions unrelated to the suspensory ligament were diagnosed, nor for diagnosis of proximal plantar metatarsal pain, as conditions outside the proximal plantar metatarsal region were also diagnosed.  相似文献   

MRI FEATURES OF METACARPO(TARSO)PHALANGEAL REGION LAMENESS IN 40 HORSES     

LIARA M. GONZALEZ  MICHAEL C. SCHRAMME  IAN D. ROBERTSON  DONALD E. THRALL  RICH W. REDDING 《Veterinary radiology & ultrasound》2010,51(4):404-414

Lameness originating from the metacarpo(tarso)phalangeal (MP) joint has a significant effect on the use and athletic competitiveness of a horse. The identification of the cause of lameness originating from the MP joint can be challenging, given the limitations of radiography, ultrasonography, and nuclear scintigraphy. Our purpose was to describe the injury types and incidence in magnetic resonance imaging (MRI) studies from 40 horses with lameness attributable to the MP joint region where it was not possible to reach a clinically plausible diagnosis using other imaging modalities. Horses were examined in a 1.5 T magnet (Siemens Medical Solutions) under general anesthesia. The frequency of occurrence of MR lesions was subchondral bone injury (19), straight or oblique distal sesamoidean desmitis (13), articular cartilage injury and osteoarthritis (eight), suspensory branch desmitis (seven), osteochondral fragmentation (seven), proximal sesamoid bone injury (seven), intersesamoidean desmitis (four), deep digital flexor tendonitis (four), collateral desmitis (three), superficial digital flexor tendonitis (two), enostosis‐like lesions of the proximal phalanx or MCIII (two), desmitis of the palmar annular ligament (one), desmitis of the proximal digital annular ligament (one), and dystrophic calcification of the lateral digital extensor tendon (one). Twenty‐five horses had multiple MR abnormalities. MRI provided information that was complementary to radiography, ultrasonography, and nuclear scintigraphy and that allowed for a comprehensive evaluation of all structures in the MP joint region and a diagnosis in all 40 horses.  相似文献   

CHEMOTHERAPY FOLLOWED BY ABDOMINAL CAVITY IRRADIATION FOR FELINE LYMPHOBLASTIC LYMPHOMA     

LAUREL E. WILLIAMS  AMY F. PRUITT  DONALD E. THRALL 《Veterinary radiology & ultrasound》2010,51(6):681-687

Combination chemotherapy is standard care for feline lymphoma, although clinically relevant improvements in remission duration are unlikely to result from manipulations of chemotherapy agents alone. Lymphopoietic tissues generally are sensitive to radiation, and support for chemoradiotherapy as a treatment for lymphoma is found in both humans and dogs. The goal of this prospective pilot study was to determine the normal tissue tolerance to 15 Gy total abdomen fractionated radiation therapy following induction chemotherapy in cats with lymphoblastic lymphoma. Eight cats with lymphoblastic gastrointestinal or multicentric lymphoma confined to the abdominal cavity were treated with a 6‐week combination chemotherapy protocol followed 2 weeks later by whole‐abdomen radiation therapy consisting of 10 daily fractions of 1.5 Gy. Treatment was well tolerated; renal insufficiency documented in one cat at the start of radiation therapy progressed to stable chronic renal failure. One cat not in complete remission at the time of radiation therapy relapsed 2 weeks later, one cat with multicentric lymphoma relapsed with hepatic large granular lymphoma, and one cat was euthanatized 3 weeks following completion of radiation therapy for other reasons; no evidence of lymphoma or radiation toxicoses was identified on post mortem evaluation. The remaining five cats remain in remission at least 266 days after starting therapy; median remission duration has not been reached (range, >266 to >1332 days). Results of this study suggest that 15 Gy total abdomen fractionated radiation therapy after induction chemotherapy is tolerated satisfactorily. This protocol is suitable for further testing to quantify efficacy.  相似文献   

Holding Power of Threaded External Skeletal Fixation Pins in the Near and Far Cortices of Cadaveric Canine Tibiae     

DARRYL E. MCDONALD DVM  MS    ROSS H. PALMER DVM  MS  Diplomate ACVS    DONALD A. HULSE DVM  Diplomate ACVS    JOSEPH S. NEIGUT MS    WILLIAM A. HYMAN MS  ScD  MARGARET R. SLATER DVM  PhD 《Veterinary surgery : VS》1994,23(6):488-493

We compared the pin-bone interfaces at the near and far cortical penetration sites of positive-profile end-threaded external fixation pins in cadaveric canine tibiae. The holding power of the pins in each cortical surface was independently measured in 21 pin-bone sections. Scanning electron microscopy (SEM) was used to compare subjectively the microstructural appearance of the pin-bone interfaces at the near and far cortical penetration sites in eight pin-bone sections. The far cortical penetration site provided greater holding power than did the near cortical site. SEM evaluation suggested more bony microfractures and debris with less pin-bone interlock in the near cortical penetration sites than in the corresponding far cortical penetration sites. This study showed that after low-speed power insertion of positive-profile end-threaded pins in canine cadaveric tibiae, the near cortical penetration site contributes approximately 25% less to the overall holding power of the pin than does the far cortical penetration site.  相似文献   

The Combination of Surgery and Radiation in the Treatment of Cancer A Review   总被引：2，自引：0，他引：2  

DEBORAH A. McLEOD DVM  DONALD E. THRALL DVM  PUD  DiplomateACVR 《Veterinary surgery : VS》1989,18(1):1-6

Although radiation and surgery have been combined for the treatment of cancer in humans and animals since the 1920s, little has been written about the methods of combining radiation and surgery and the efficacy of this combination for the treatment of animal tumors. This article reviews the rationale for combining radiation and surgery for the treatment of cancer and the ways in which these two modalities can be combined with emphasis placed on the advantages and disadvantages of preoperative and postoperative radiotherapy. The role of preoperative and postoperative irradiation for the treatment of various animal tumors is discussed. Directions for future clinical trials are pointed out. Finally, the importance of surgeons and radiation oncologists communicating with each other and participating in cooperative treatment methods is stressed.  相似文献