Synthesis and herbicidal activity of some potent bicyclic ether herbicides     

Wendy S. Taylor  James E. Powell  Eileen L. Marsilii  Kathryn J. Leep 《Pest management science》1995,44(1):85-87

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Phytotoxicity of Methyl Bromide to Chrysanthemum Cuttings     

K. G. Gostick  D. F. Powell 《Plant pathology》1971,20(3):136-141

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Sporotrichosis in a dog   总被引：2，自引：0，他引：2  

G Koehne  H S Powell  R I Hail 《Journal of the American Veterinary Medical Association》1971,159(7):892-894

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Studies on the mechanism of vaccinal immunity to Marek''s disease   总被引：1，自引：0，他引：1  

L.N Payne  P.C Powell  M.C Rennie  L.J.N Ross 《Comparative immunology, microbiology and infectious diseases》1978,1(1-2):31-36

Current knowledge of the nature of the antigens and of the host immune responses in vaccinal immunity to Marek's disease is reviewed. It is suggested that a two-step mechanism of resistance operates. The first step involves humoral and cell-mediated responses directed against viral antigens; the second step occurs after challenge with Marek's disease virus and consists of cellmediated responses directed against tumour cells.  相似文献   

Cloning,expression, purification,and biological activity of five feline type I interferons   总被引：1，自引：0，他引：1  

Wonderling R  Powell T  Baldwin S  Morales T  Snyder S  Keiser K  Hunter S  Best E  McDermott MJ  Milhausen M 《Veterinary immunology and immunopathology》2002,89(1-2):13-27

Type I interferons (IFN) are important mediators of the host defense against viral infections in mammals. In humans multiple subtypes of IFN-alpha exist, most of which possess antiviral activity. Little is known about the type I IFN genes in cats and the role they may play in feline immunological responses to viruses. We have isolated cDNAs encoding five feline IFN-alpha (feIFN) subtypes that share from 95 to 99% amino acid sequence identity. FeIFN-alpha5 has five additional amino acids inserted at position 139, which are not present in the other four subtypes. Sequence identity of the feIFN proteins encoded by the five clones compared to human IFN-alpha2 is approximately 60%. Unlike most of the human subtypes, each of the five feline IFN sequences has an N-glycosylation recognition site. Expression of all five feIFN-alpha subtypes in Chinese hamster ovary (CHO) cells was confirmed by Western blot analysis, and all resulting proteins were glycosylated. The antiviral activity of each feIFN-alpha subtype produced in transiently transfected CHO cell cultures was tested in vitro. In addition, subtype feIFN-alpha6 was expressed in the yeast, Pichia pastoris. The resulting secreted mature recombinant protein was purified and demonstrated significant antiviral activity and induction of 2',5'-oligoadenylate synthetase activity in vitro.  相似文献   

Xylitol intoxication associated with fulminant hepatic failure in a dog     

Jeffrey M. Todd  DVM    Lisa L. Powell  DVM  DACVECC 《Journal of Veterinary Emergency and Critical Care》2007,17(3):286-289

Objective: To describe a case of xylitol intoxication causing fulminant hepatic failure in a dog. Case summary: A 2.5‐year‐old castrated male English Springer Spaniel weighing 26 kg, was presented after ingestion of half of a loaf of bread containing the sweetener xylitol. Toxic effects of the xylitol in this dog included vomiting, mild hypoglycemia and fulminant hepatic failure. Clinical management of acute hepatic failure and subsequent coagulopathy with supportive care and fresh frozen plasma is described. The dog was discharged 3 days after admission after a full clinical recovery. New or unique information provided: This paper describes the clinical consequence and successful treatment of fulminant hepatic failure in a dog following ingestion of xylitol.  相似文献   

Efficiency of early selection for rotation-aged wood quality traits in radiata pine     

Harry X. Wu  Mike B. Powell  Junli L. Yang  Milo Ivković  Tony A. McRae 《Annals of Forest Science》2007,64(1):1-9

A total of 360 bark-to-bark-through-pith wood strips were sampled at breast height from 180 trees in 30 open-pollinated families from two rotation-aged genetic trials to study inheritance, age-age genetic correlation, and early selection efficiency for wood quality traits in radiata pine. Wood strips were evaluated by SilviScan® and annual pattern and genetic parameters for growth, wood density, microfibril angle (MFA), and stiffness (modulus of elasticity: MOE) for early to rotation ages were estimated. Annual ring growth was the largest between ages 2–5 years from pith, and decreased linearly to ages 9–10. Annual growth was similar and consistent at later ages. Wood density was the lowest near the pith, increased steadily to age 11–15 years, then was relatively stable after these ages. MFA was highest (35°) near the pith and reduced to about 10° at age 10–15 years. MFA was almost unchanged at later ages. MOE increased from about 2.5 GPa near the pith to about 20 GPa at ages 11–15 years. MOE was relatively unchanged at later ages. Wood density and MOE were inversely related to MFA. Heritability increased from zero near the pith and stabilised at ages 4 or 5 for all four growth and wood quality traits (DBH, density, MFA and MOE). Across age classes, heritability was the highest for area-weighted density and MFA, lowest for DBH, and intermediate for MOE. Age-age genetic correlations were high for the four traits studied. The genetic correlation reached 0.8 after age 7 for most traits. Early selection for density, MFA and MOE were very effective. Selection at age 7–8 has similar effectiveness as selection conducted at rotation age for MFA and MOE and at least 80% effective for wood density.  相似文献   

Unicortical condylar fracture of the Thoroughbred fetlock: 45 cases (2006–2013)          下载免费PDF全文

P. H. L. Ramzan  L. Palmer  S. E. Powell 《Equine veterinary journal》2015,47(6):680-683

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Quantification and persistence of recombinant DNA of Roundup Ready corn and soybean in rotation     

Lerat S  Gulden RH  Hart MM  Powell JR  England LS  Pauls KP  Swanton CJ  Klironomos JN  Trevors JT 《Journal of agricultural and food chemistry》2007,55(25):10226-10231

The presence of the recombinant cp4 epsps gene from Roundup Ready (RR) corn and RR soybean was quantified using real-time PCR in soil samples from a field experiment growing RR and conventional corn and soybean in rotation. RR corn and RR soybean cp4 epsps persisted in soil for up to 1 year after seeding. The concentration of recombinant DNA in soil peaked in July and August in RR corn and RR soybean plots, respectively. A small fraction of soil samples from plots seeded with conventional crops contained recombinant DNA, suggesting transgene dispersal by means of natural process or agricultural practices. This research will aid in the understanding of the persistence of recombinant DNA in agricultural cropping systems.  相似文献   

Karyotype analysis of Oreochromis mortimeri (Trewavas) and Sarotherodon melanotheron (Rüppell)     

S C Harvey  S F Powell  D D Kennedy  B J McAndrew  & D J Penman 《Aquaculture Research》2002,33(5):339-342

The karyotypes of both Oreochromis mortimeri (Trewavas) and Sarotherodon melanotheron (Rüppell) are shown to consist of 22 pairs of chromosomes (2n = 44). In O. mortimeri, the karyotype is composed of 9 sm/st and 13 t chromosomes. In the case of S. melanotheron, the karyotype is composed of 15 sm/st, 2 m and 5 t chromosomes. The karyotypes of these species are therefore similar to those of the majority of other tilapia species, with that of S. melanotheron being considerably different from that previously reported for this species.  相似文献