SECTION G (BOTANICAL SCIENCES) AND RELATED ORGANIZATIONS     

Trelease SF  Eames AJ  Foster AS  Denny FE  Martin GW  Whitney WA  Horr WH 《Science (New York, N.Y.)》1930,71(1832):156-159

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Error Sources Affecting Variable Rate Application of Nitrogen Fertilizer     

C.?W.?ChanEmail author  J.?K.?Schueller  W.?M.?Miller  J.?D.?Whitney  J.?A.?Cornell 《Precision Agriculture》2004,5(6):601-616

The accuracy and interaction among global positioning system (GPS) horizontal accuracy, differential GPS (DGPS) sampling frequencies and machine delay times of a hypothetical variable rate applicator for nitrogen (N) fertilizer application based on an application map in Florida citrus were studied. Parameters studied included: five GPS horizontal accuracy levels, two levels of DGPS horizontal accuracy, two DGPS sampling frequencies and two machine delay times. Two integrated models were developed which documented the effects of the parameters. Machine delay time was the most important factor and GPS horizontal accuracy was the second most important.  相似文献   

Structural basis for the transition from initiation to elongation transcription in T7 RNA polymerase     

Yin YW  Steitz TA 《Science (New York, N.Y.)》2002,298(5597):1387-1395

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Error Sources on Yield-Based Fertilizer Variable Rate Application Maps     

Chan  C. W.  Schueller  J. K.  Miller  W. M.  Whitney  J. D.  Wheaton  T. A.  Cornell  J. A. 《Precision Agriculture》2002,3(1):81-94

Spatially-variable application of inputs to agricultural fields is dependent upon accuracy of the input variables. The effects of boundary determination, interpolation method, and GPS location errors were studied for determining a variable rate nitrogen application map based upon yield maps of a 3.6 ha Florida citrus block. A general linear model for the mean absolute error approximated the error effects.  相似文献   

Antigenic relationship of the picorna-like virus of larval barramundi, Lates calcarifer Bloch to the nodavirus of larval striped jack, Pseudocaranx dentex (Bloch & Schneider)     

BL MUNDAY  T NAKAI  HD NGUYEN 《Australian veterinary journal》1994,71(11):384-385

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Cytoplasmic crystalloids in the ovary of a woolly monkey     

M R Elwell  A DePaoli  G D Whitney 《Veterinary pathology》1980,17(6):773-776

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Effect of long-term tetracycline exposure (drinking water additive) on antibiotic-resistance of aerobic gram-negative intestinal flora of rats.     

C M Beaucage  J G Fox  K M Whitney 《American journal of veterinary research》1979,40(10):1454-1457

A study was undertaken to determine the effect of 2 years of intermittent administration of tetracycline in drinking water on antibiotic resistance in the aerobic gram-negative enterobacteria of rats in a closed colony. The bacterial isolates examined were resistant to tetracycline and streptomycin. Minimal inhibitory concentrations of tetracycline and streptomycin for intestinal organisms were similar in all of the animals, regardless of whether the animals were sampled while they were given drinking water with added tetracycline or at intervals of 3, 8, and 9 months after the antibiotic was no longer added to the drinking water. Biochemical examination of the isolates from each principal showed that Escherichia coli was the predominant enteric organism. In conjugation experiments, all E coli and Klebsiella pneumoniae isolated transferred tetracycline and streptomycin resistance to an E coli K-12 recipient. Four different strains of rats that had not been treated with tetracycline (controls) were examined for tetracycline resistance. Tetracycline-resistant Proteus mirabilis was isolated from the intestines of these animals. Plasmid-mediated resistance could not be demonstrated. The E coli and P vulgaris isolates from these control animals were susceptible to tetracycline.  相似文献   

Nodular amyloidosis in the trachea of a dog     

G S Dill  J L Stookey  G D Whitney 《Veterinary pathology》1972,9(4):238-242

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Polydipsia in the dog--symposium. 2. Polydipsia and its relationship to pyometra     

J C Whitney 《The Journal of small animal practice》1969,10(8):485-489

Abstract— —A generalised hormonal imbalance in adult bitches produces a hyperplasia of the endo-metrium and would seem to lower its resistance to secondary bacterial invaders. A variety of organisms, including E. coli, invade the endometrium and set up an inflammatory reaction with the formation of pus, i.e. pyometra. The clinical signs of pyometra include a polydipsia which is secondary to excessive fluid loss through the kidney. The histological examination of the kidneys from these cases of pyometra show extensive lesions. The capillary tuft and basement membrane of the glomerulus are thickened by a PAS-positive material. Similar, though less severe changes are seen in the renal tubules. All these lesions are said to be reversible following ovaro-hysterectomy. Some doubts are raised as to the specificity of these kidney changes. Résumé— —Un déséquilibre hormonal généralisé provoque chez la chienne adulte une hyperplasie de l'endomètre et semble réduire la résistance de celui-ci aux agressions bactériennes secondaires. Divers microbes, dont le colibacille, envahissent l'endomètre, pour y provoquer une réaction inflam-rnatoire pyogène, c'est-à-dire la pyométrie. Les manifestations cliniques de la pyométrie comprennent notamment la polydipsie, effet d'une déperdition hydrique excessive par la voie rénale. L'examen histologique du rein permet de constater, dans ces cas de pyométrie, d'importantes lésions rénales. Le floculus capillaire et las basale du glomérule sont épaissis par une substance positive à la coloration hématoxyline-acide périodique-Schiff. Les tubes urinaires présentent des altérations comparables, quoique moins marquées. L'ensemble de ces lésions serait réversibie à la suite de l'hystéro-ovariectomie. La spécificité de ces altérations rénales est douteuse à certains égards. Suivant une certaine hypothèse, la polyurie serait imputable à l'absorption de toxines d'origine utérine. Zusammenfassung— —Eine generalisierte hormonale Unausgeglichenheit bei erwachsenen Hün-dinnen erzeugt eine Hyperplasie des Endometriums und scheint dessen Widerstandsfähigkeit gegen sekundären Bakterienbefall herabzusetzen. Verschiedene Organismen einschliesslich E. coli können das Endometrium befallen und eine Entzündung mit Eiterbildung, d.h. Pyometra, hervorrufen. Zu den klinischen Zeichen von Pyometra gehört eine sekundäre Polydipsie nach übermässigem Flüssigkeitsverlust durch die Nieren. Die histologische Untersuchung der Nieren in diesen Fällen von Pyometra zeigt ausgedehnte Läsionen. Die Kapillarschicht und die Basalmembrane des Glomerulus sind durch ein PAS-positives Material verdickt. Ähnliche, doch weniger schwere Veränderungen sind an den Nierenkanälchen zu beobachten. Nach Ovariohysterectomie sollen alle diese Läsionen reversibel sein. Hinsichtlich der Spezifischkeit dieser Nierenveränderungen sind einiga Zweifel angemeldet worden. Es wurde auf die Möglichkeit hingewiesen, dass die Polyurie auf die Absorption von Toxinen aus dem Uterus zurückzuführen sein kann. It has been suggested that the polyuria is due to the absorption of toxins from the uterus.  相似文献   

Four cats with fungal rhinitis   总被引：2，自引：0，他引：2  

Whitney BL  Broussard J  Stefanacci JD 《Journal of Feline Medicine and Surgery》2005,7(1):53-58

Fungal rhinitis is uncommon in the cat and cases of nasal aspergillosis-penicilliosis have been rarely reported. Signs of fungal rhinitis include epistaxis, sneezing, mucopurulent nasal discharge and exophthalmos. Brachycephalic feline breeds seem to be at increased risk for development of nasal aspergillosis-penicilliosis. Computed tomography (CT) imaging and rhinoscopy are useful in assessing the extent of the disease and in obtaining diagnostic samples. Fungal culture may lead to false negative or positive results and must be used in conjunction with other diagnostic tests. Serological testing was not useful in two cats tested. The cats in this study were treated with oral itraconazole therapy. When itraconazole therapy was discontinued prematurely, clinical signs recurred. Hepatotoxicosis is a possible sequel to itraconazole therapy.  相似文献