Alternative Potash Fertilizer Source for Millet Crop     

Ivaniele Nahas Duarte  Robson Thiago Xavier de Sousa  Gaspar Henrique Korndörfer  Hamilton Seron Pereira 《Journal of plant nutrition》2015,38(12):1961-1972

Millet is a grass that responds to potassium fertilization and Alfa 01 and Alfa 02 are potential sources of this nutrient. Thus, the aim of this study was to evaluate the potential of as potassium sources by measuring accumulation of this nutrient in millet. The crop was grown in Ustoxic Quartzipsamment (RQo) soil. The experiment was set up in randomized blocks with three repetitions. The treatments consisting of three sources (KCl, Alfa 02, Alfa 01), two rates (200 and 400 kg ha^?1 K₂O) and with no K fertilization (control). Potassium chloride was used as the standard to which the other sources of potassium were compared. Two consecutive crops of millet were grown in the same pots. The first crop received potassium source application but not the second. At the end of experiment, shoot dry matter production, shoot potassium concentration, shoot accumulated potassium, soil potassium and relative agronomic efficiency were determined. The relative agronomic efficiency, calculated from crops, was 100% for KCl, was 84% for Alfa 02 and was 11% for Alfa 01. In the shoot dry matter production and accumulated potassium only Alfa 01 was not statistically different of control. Millet absorbed potassium from the Alfa 02 source in both the first and second crops.  相似文献   

Advances in methodology for diagnosis of allergic skin disease   总被引：1，自引：0，他引：1  

C A Sousa  A L Norton 《Veterinary Clinics of North America: Small Animal Practice》1990,20(6):1419-1427

Advantages of IDST for diagnosis of atopy and selection of antigens for hyposensitization include the following: 1. The test is widely accepted by clients. 2. The clinician can select individual test allergens based on the patient history and geographic location. 3. It has been the standard for diagnosing atopy in the dog for more than 40 years. Disadvantages of IDST include the following: 1. The test should be performed on a regular basis to maintain reliability. 2. Interpretation of test results is subjective. 3. The test is not standardized on the basis of the examiner, source of the allergen, or reproducibility. 4. There is occasional difficulty in performing the test (e.g., need for sedation). 5. Anaphylaxis is a potential risk. 6. A significant amount of office time is needed to perform the test. 7. Condition of the patient's skin (e.g., lichenification, hyperpigmentation, pyoderma) may preclude its use. 8. There is a possibility of failure to test for appropriate allergens. 9. There may be false-positive and false-negative reactions. 10. Other medications can interfere with the test (e.g., antihistamines, corticosteroids). Advantages of in vitro testing for diagnosis of atopy and selecting antigens for hyposensitization include the following.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Atopic dermatitis     

C A Sousa 《Veterinary Clinics of North America: Small Animal Practice》1988,18(5):1049-1059

The article considers the pathogenesis, clinical signs, diagnosis, and treatment of atopic dermatitis.  相似文献   

Can place names be used as indicators of landscape changes? Application to the Doñana Natural Park (Spain)     

Sousa  Arturo  García-Murillo  Pablo 《Landscape Ecology》2001,16(5):391-406

This work broaches the possibility of using place names as indicators of original landscapes that have been much transformed. The reconstruction of landscape elements from place names is commonly disputed because such daring notion is impossible to demonstrate. The present case avoids this by making a preliminary study of changes in the landscape using conventional methods. With the knowledge gained from objective and reliable sources, the possibility is analyzed of whether place names are a reflection of landscape changes taking place over a considerable period of time (the last few centuries). It is concluded that, for the present case study, in natural areas with a high rate of change of land use (Doñana Natural Park), place names indicate not only changes in the landscape, but also how such changes are perceived. In the study area, this is especially clear regarding the fens.  相似文献   

Dermatosis associated with feeding generic dog food: 13 cases (1981-1982)     

C A Sousa  A A Stannard  P J Ihrke  S I Reinke  L P Schmeitzel 《Journal of the American Veterinary Medical Association》1988,192(5):676-680

The records of 13 dogs with a crusting dermatosis of the mucocutaneous junctions, pressure points, and trunk were evaluated. All of the dogs had been fed corn- and wheat-based commercial dry dog foods that failed to meet the National Research Council's recommendations for balanced nutrition. The dermatosis in all 13 dogs resolved completely after the diet was changed to one that met the National Research Council's recommendations. The disease was similar to that which has previously been called canine dry pyoderma, but is now known to be a zinc-responsive dermatosis.  相似文献   

Assessment of electrocardiographic parameters in healthy dogs undergoing dobutamine stress testing     

Sousa MG  Pereira-Neto GB  Carareto R  Gerardi DG  Camacho AA 《Schweizer Archiv für Tierheilkunde》2005,147(12):541-545

The electrocardiographic effects of dobutamine stress testing (10 to 40 microg/kg/minute) were investigated in five conscious healthy dogs. We studied the changes in the duration and amplitude of P wave, PR interval, duration of QRS complex, R wave amplitude, QT interval, and heart rate. Development of arrhythmias and ST segment abnormalities were also recorded. It was observed that dobutamine significantly affects atrioventricular-nodal conduction and total electrical systole time at higher infusion rates. Only a single episode of sustained ventricular tachycardia was observed, which was promptly restored to sinus rhythm shortly after dobutamine infusion was discontinued. No ST segment abnormalities were detected. Dobutamine stress testing was concluded to play a role in some ECG parameters at higher infusion rates.  相似文献   

Characterization of Ehrlichia ruminantium replication and release kinetics in endothelial cell cultures     

Marcelino I  Veríssimo C  Sousa MF  Carrondo MJ  Alves PM 《Veterinary microbiology》2005,110(1-2):87-96

Ehrlichia ruminantium is the causative agent of Heartwater, a fatal tick-borne disease affecting ruminants in African countries and West Indies and can be used as an inactivated vaccine for wild and domestic animals. In order to improve E. ruminantium production yields we characterize E. ruminantium growth kinetics in terms of duplication time, maximum production yield, and peak of infectivity. After a 24 h period for E. ruminantium attachment/internalization and a lag phase of 12 h, the exponential growth occurred within 36-108 h post-infection (hpi) with a net increase of up to 2.2 orders of magnitude. Maximum E. ruminantium infectivity was observed at 120 hpi and was defined as the best time of harvesting (TOH) for propagation of E. ruminantium cultures. This study showed that considering the quality constraint of the final product (E. ruminantium vaccine), the E. ruminantium suspension should be harvested at 113 hpi. Overall, the characterization of E. ruminantium progression through the average infection cycle, not only can contribute to the maximization of E. ruminantium production yield, with important consequences for the large scale production and utilization of an inactivated Heartwater vaccine, but also to elucidate growth mechanisms of some of the other ehrlichial species, with emerging impact in human and animal health.  相似文献   

Structure–activity relationships of eugenol derivatives against Aedes aegypti (Diptera: Culicidae) larvae     

Juliana DF Barbosa  Viviane B Silva  Péricles B Alves  Giuseppe Gumina  Roseli LC Santos  Damião P Sousa  Sócrates CH Cavalcanti 《Pest management science》2012,68(11):1478-1483

BACKGROUND: Dengue fever is a severe public health problem for several countries. In order to find effective larvicides to aid control programs, the structure‐activity relationships of eugenol derivatives against Aedes aegypti (Diptera: Culicidae) larvae were evaluated. Additionally, the composition and larvicidal activity of Syzygium aromaticum essential oil was assessed. RESULTS: Four compounds representing 99.05% of S. aromaticum essential oil have been identified. The essential oil was active against Ae. aegypti larvae (LC₅₀ = 62.3 and 77.0 ppm, field‐collected and Rockefeller larvae respectively). The larvicidal activity of eugenol, the major compound of the essential oil, was further evaluated (LC₅₀ = 93.3 and 71.9 ppm, field‐collected and Rockefeller larvae respectively). The larvicidal activity and structure‐activity relationships of synthetic derivatives of eugenol were also assessed. The larvicidal activity of the derivatives varied between 62.3 and 1614.9 ppm. Oxidation of eugenol allylic bond to a primary alcohol and removal of the phenolic proton resulted in decreased potency. However, oxidation of the same double bond in 1‐benzoate‐2‐methoxy‐4‐(2‐propen‐1‐yl)‐phenol resulted in increased potency. CONCLUSION: Structural characteristics were identified that may contribute to the understanding of the larvicidal activity of phenylpropanoids. The present approach may help future work in the search for larvicidal compounds. Copyright © 2012 Society of Chemical Industry  相似文献   

Current understanding of the pathophysiologic mechanisms of canine atopic dermatitis     

R Marsella  CA Sousa  AJ Gonzales  VA Fadok 《Journal of the American Veterinary Medical Association》2012,241(2):194-207

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CA15.3, CEA and LDH in Dogs with Malignant Mammary Tumors     

L.C. Campos  G.E. Lavalle  A. Estrela‐Lima  J.C. Melgaço de Faria  J.E. Guimarães  Á.P. Dutra  E. Ferreira  L.P. de Sousa  É.M.L. Rabelo  A.F.D. Vieira da Costa  G.D. Cassali 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2012,26(6):1383-1388

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