Behavioral neurobiology: neuroethology and behavioral physiology     

Hoy RR 《Science (New York, N.Y.)》1984,224(4656):1422-1423

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Suppression of mitogenic response of bovine lymphocytes during experimental ketosis in calves   总被引：1，自引：0，他引：1  

S P Targowski  W Klucinski  E T Littledike  D A Hoy 《American journal of veterinary research》1985,46(6):1378-1380

Experimental ketosis was induced by feeding calves a diet containing 1,3 butanediol for 9 or 10 days. Blood beta-hydroxybutyrate was significantly (P less than 0.05) elevated during clinical ketosis. The mitogenic response of the lymphocytes collected during ketosis was significantly (P less than 0.01) suppressed, and the suppression persisted for 2 weeks. During ketosis, all calves fed a 1,3 butanediol diet had clinical signs of an upper respiratory tract infection. Possible relationships between the suppressed function of lymphocytes, the increased concentration of 1,3 butanediol, and the increased susceptibility of the calves to infections during ketosis were considered.  相似文献   

Effect of tissue culture explant source on sugarcane yield components     

Jeffrey W. Hoy  Keith. P. Bischoff  Scott. B. Milligan  Kenneth. A. Gravois 《Euphytica》2003,129(2):237-240

Clonal propagation of sugarcane(interspecific hybrids of Saccharum)is conducive to spread of systemicdiseases, such as ratoon stunting disease,caused by Leifsonia xyli subsp. xyli. This important disease iscontrolled by obtaining and plantinghealthy seed-cane. In Louisiana, commercialseed-cane initially produced through tissueculture is available to sugarcane farmersand is being widely planted. Long-termacceptability of this seed-cane productionmethod depends on the production of healthyplants that do not differ significantly inphenotypic and yield characteristics fromthe clones originally selected and releasedas commercial cultivars. To determinewhether tissue culture affects yield or itscomponents, three cultivars, CP 70-321, LCP85-384, and HoCP 85-845, were compared inthree successive crops initially plantedwith stalks from three sources: plantsderived from callus culture of the leafroll above the apical meristem, directregeneration from the apical meristem, andconventional bud propagation. Stalks ofplants derived from both explant sourceswere typical of seed-cane farmers wouldpurchase for planting that had beenpreviously rogued for phenotypic variantsand increased by bud propagation.Differences in yield components amongtissue culture explant sources and budpropagated cane only occurred in CP 70-321.Stalk diameter and stalk weight were lowerand stalk population was higher for plantsderived from leaf roll callus compared tobud propagated cane. Yield components weresimilar for plants derived from an apicalmeristem and bud propagation. Individualplant phenotypic variants resulting fromsomaclonal variation were not observed inany of the cultivars derived from eitherexplant source. In summary, genotype andexplant source affected persistent, uniformphenotypic variation resulting from tissueculture that changed some yield components. However, apical meristem culture wassuitable for production of seed-cane, assugarcane derived by meristem culture ofthree cultivars did not differsignificantly from the original germplasmfor any measured yield trait.  相似文献   

Initiation of behavior by single neurons: the role of behavioral context   总被引：7，自引：0，他引：7  

T G Nolen  R R Hoy 《Science (New York, N.Y.)》1984,226(4677):992-994

Flying crickets avoid sources of ultrasound, possibly echolocating bats, by making rapid steering movements that turn them away from the stimulus. Electrical stimulation of a single, identified sensory interneuron (Int-1) elicits avoidance steering; depressing its response to ultrasound abolishes avoidance steering. Int-1 is necessary and sufficient for this behavior but only while the cricket is in flight. Thus, the sufficiency of Int-1 for eliciting this behavior is contingent on behavioral context.  相似文献   

Genetic control of song specificity in crickets     

Hoy RR  Paul RC 《Science (New York, N.Y.)》1973,180(4081):82-83

The calling song of male field crickets is composed of stereotyped rhythmic pulse intervals, which are predictable expressions of genotype. Females identify conspecific males by their song. Two species of crickets were found to exhibit species-specific song preference, and hybrids between them preferred hybrid calls over either parental call. These results imply genetic control of song reception as well as transmission.  相似文献   

Biotechnology and the environment     

Hoy MA 《Science (New York, N.Y.)》1991,253(5015):89-90

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Competencies: a cure for pre-med curriculum     

Anderson WA  Amasino RM  Ares M  Banerjee U  Bartel B  Corces VG  Drennan CL  Elgin SC  Epstein IR  Fanning E  Guillette LJ  Handelsman J  Hatfull GF  Hoy RR  Kelley D  Leinwand LA  Losick R  Lu Y  Lynn DG  Neuhauser C  O'Dowd DK  Olivera T  Pevzner P  Richards-Kortum RR  Rine J  Sah RL  Strobel SA  Walker GC  Walt DR  Warner IM  Wessler S  Willard HF  Zare RN 《Science (New York, N.Y.)》2011,334(6057):760-761

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BIOMECHANICAL COMPARISON OF THREE INTERNAL FIXATIONS FOR TREATMENT OF SLIPPED CAPITAL FEMORAL EPIPHYSIS IN IMMATURE DOGS     

Belkoff SM  Millis DL  Probst CW 《Veterinary surgery : VS》1993,22(3):183-183

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Molecular and symptom analyses of phytoplasma strains from lettuce reveal a diverse population     

Zhang J  Hogenhout SA  Nault LR  Hoy CW  Miller SA 《Phytopathology》2004,94(8):842-849

ABSTRACT Epidemics of aster yellows in lettuce in Ohio are caused by at least seven distinct phytoplasma strains in the aster yellows (AY) group. Five of the strains are newly reported: AY-BW, AY-WB, AY-BD3, AY-SS, and AY-SG. All seven strains were characterized based on symptoms in aster and lettuce, and by polymerase chain reaction (PCR). Strain AY-BD2 (formerly 'Bolt') causes yellowing and leaf distortion in lettuce and bolting in aster, whereas strain AY-S (formerly 'Severe') causes stunting, leaf clustering, and phyllody. Strain AY-WB causes yellowing and wilting in lettuce and witches'-broom in aster. Strain AY-SG induces horizontal growth in lettuce and aster plants. Strain AY-BW causes chlorosis of emerging leaves and abnormally upright growth of leaf petioles. AY-SS causes symptoms similar to those caused by AY-S but has a different PCR-restriction fragment length polymorphism (RFLP) banding pattern. Strains AY-BD2 and AY-BD-3 cause mild leaf and stem distortion in lettuce but are differentiated by PCR-RFLP. All phytoplasma strains collected from lettuce in Ohio belong to the 16SrI group. AY-WB belongs to the 16SrI-A subgroup and the other six belong to the 16SrI-B subgroup. Five of the seven strains were distinguished from each other by primer typing. The results of phylogenetic analyses of sequences of the 16S rRNA genes were basically consistent with the classification based on PCR-RFLP, in which AY-WB clustered with phytoplasmas of the 16rIA subgroup and the other Ohio lettuce strains clustered with phytoplasmas in the 16SrI-B subgroup.  相似文献   

Transient Horner′s syndrome after paravertebral brachial plexus blockade in a dog     

Jaime Viscasillas  Sandra Sanchis‐Mora  Carol Hoy  Hatim Alibhai 《Veterinary anaesthesia and analgesia》2013,40(1):104-106

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