The Nature of the Volatile Products from Apples     

Leslie P. Walls 《The Journal of Horticultural Science and Biotechnology》2013,88(2):59-67

  相似文献   

Clinical outcomes associated with the initial use of the Canine Unicompartmental Elbow (CUE) Arthroplasty System?     

James L. Cook  Kurt S. Schulz  G. Josh Karnes  Samuel P. Franklin  Sherman O. Canapp  Jr.  Peter J. Lotsikas  Noel Fitzpatrick  Jason L. Wheeler  Kevin S. Stiffler  Mitchell Gillick  Alan R. Cross  Charles M. Walls  Mark R. Albrecht  Ned Williams  David T. Crouch  Daniel D. Lewis  Antonio Pozzi  Patrick Ridge 《The Canadian veterinary journal. La revue veterinaire canadienne》2015,56(9):971-977

We evaluated mid- to long-term outcomes with respect to function and complications in dogs undergoing canine unicompartmental elbow (CUE) arthroplasty for treatment of medial compartment disease of the elbow. This prospective multicenter case series is the first group of clinical cases to receive CUE arthroplasty. Cases (each elbow that underwent CUE performed by a participating surgeon) were enrolled into an electronic database and prospectively followed to determine and record all associated complications, as well as functional outcomes. There were 103 cases from 18 surgeons. Final follow-up time ranged from 6 to 47 mo with a mean and median of 10 mo. Canine unicompartmental elbow was associated with 1 catastrophic (1%), 11 major (10.7%), and 28 minor (27.2%) complications. Outcomes following CUE were reported as full function in 49 cases (47.6%), acceptable function in 45 cases (43.7%), and unacceptable function in 9 cases (8.7%). We conclude that CUE arthroplasty is an appropriate consideration for treatment of medial compartment disease of the elbow in dogs.  相似文献   

Endogenous Progesterone Concentrations Affect Progesterone Release from Intravaginal Devices Used for Oestrous Synchronization in Cattle          下载免费PDF全文

HL Neri  MP Palhao  DS Costa  JHM Viana  CAC Fernandes 《Reproduction in domestic animals》2015,50(4):692-695

Intravaginal progesterone‐releasing devices are largely used both as contraceptives in humans and as a component of oestrous synchronization protocols in cattle. To reduce costs in large‐scale timed artificial insemination, the reuse of these releasing devices is common. Passive hormone diffusion, however, depends on the concentration gradient, which could affect the amount of residual progesterone present in these devices after a first use. To evaluate the effect of the presence of a corpus luteum in the release of progesterone from intravaginal devices, three synchronization protocols were designed to simulate the effects of inserting the device in the early dioestrus, late dioestrus or anoestrus. Holstein‐Zebu cross‐bred heifers were randomly allocated into one of these three treatments, and a series of blood samples was taken to evaluate the plasma progesterone concentrations. After 8 days, the intravaginal devices were removed and underwent a previously validated alcoholic extraction technique to measure the residual progesterone. Non‐used devices were used as controls. As expected, the simultaneous presence of the intravaginal device and a corpus luteum resulted in increased plasma progesterone concentrations. Conversely, the amount of residual progesterone in the devices after use was inversely proportional to the plasma progesterone concentration. These results demonstrate that the release rate of progesterone from intravaginal devices is affected by the endogenous concentration of this hormone; consequently, the strategy for reuse should account for the category and expected luteal cyclic activity of the animals undergoing synchronization protocols.  相似文献   

A COMPREHENSIVE MORPHOLOGY OF SPHENODON     

Walls GL 《Science (New York, N.Y.)》1935,82(2130):391

  相似文献   

Granulocytic Ehrlichiosis in Dogs from North Carolina and Virginia   总被引：11，自引：1，他引：10  

Elizabeth E. Goldman  Edward B. Breitschwerdt  Carol B. Grindem  Barbara C. Hegarty  Jennifer J. Walls  J. Stephen Dumler 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1998,12(2):61-70

Medical records of 3 dogs from North Carolina and 3 dogs from Virginia with ehrlichial morulae in circulating neutrophils were studied retrospectively. Two clinically distinct disease syndromes, including chronic, moderate to severe anemia (n = 3) and polyarthritis (n = 2) were associated with canine granulocytic ehrlichiosis (CGE) in these dogs. One dog was clinically healthy, and abnormalities were not detected during physical examination. Clinical signs were nonspecific and included fever, lethargy, anorexia, vomiting, and diarrhea. The most frequent laboratory abnormalities were normocytic normochromic nonregenerative anemia, moderate thrombocytopenia with large platelets, lymphopenia, and eosinopenia. Considerable variability was found in the serologic responses to Ehrlichia equi, Ehrlichia canis , and Ehrlichia chaffeensis antigens among the 5 dogs for which stored sera were available for indirect fluorescent antibody testing. Polymerase chain reaction amplification and sequencing of portions of the 16S rRNA gene from blood (collected in ethylenediaminetetraacetic acid) of 1 severely anemic dog (dog 3) and 1 polyarthritic dog (dog 4) resulted in DNA sequences nearly identical to the GenBank accessions for Ehrlichia ewingii. The DNA sequence from a 3rd dog (dog 5) was most similar to that of E. canis. Serologic or molecular results support the possibility of E. ewingii, E. equi , and E. canis coinfection or serologic cross-reactivity among canine granulocytic and monocytic Ehrlichia species in dogs from North Carolina and Virginia. Variability in response to tetracycline or doxycycline treatment was noted in these dogs, with more rapid resolution of signs in dogs with polyarthritis. We report the 1st cases of CGE in dogs from North Carolina and Virginia, including recognition of CGE in a healthy dog.  相似文献   

Sedimentary profiles of pollution marker chemicals along a large tributary of Chesapeake Bay (mid-Atlantic USA)     

Foster  Gregory D.  Walls  Cassi  McEachern  Phillip R.  Huff  Thomas B.  McBride  Randolph 《Journal of Soils and Sediments》2019,19(3):1511-1526

Journal of Soils and Sediments - Molecular markers in environmental geochemistry include natural product or pollutant chemicals in sediments that are indicative of discharge sources or emission...  相似文献   

A rapid and sensitive PCR-based diagnostic assay to detect bovine herpesvirus 1 in routine diagnostic submissions   总被引：4，自引：0，他引：4  

Moore S  Gunn M  Walls D 《Veterinary microbiology》2000,75(2):145-153

We describe a rapid, sensitive and specific polymerase chain reaction (PCR) assay for the detection of BHV1 DNA in a range of routine diagnostic submissions without the need for prior virus isolation. The assay, which is based on the selected amplification of a portion of the viral tk gene, detected both BHV1.1 and BHV1.2 subtypes in a panel of 15 characterised field isolates, and its sensitivity was estimated to be <0.125 TCID(50). BHV2, alcephaline herpesvirus, BHV4, equine herpesvirus 1 (EHV1), EHV4 and pseudorabies virus were not detected confirming the specificity of the assay. One hundred and five diagnostic submissions, including tissues, nasal secretions and nasal swabs were taken from cattle with respiratory disease and tested using the routine methods of virus isolation (VI) and the fluorescent antibody test (FAT), and the results were compared with those obtained by PCR. The PCR assay detected BHV1 DNA in all samples that were positive by VI. BHV1 DNA was also detectable by PCR in raw and extended semen samples at a sensitivity of 1 TCID(50) per 50microl. The assay also detected BHV5, permitting differentiation between it and BHV1 by virtue of the size of the amplified PCR product. The PCR assay is more sensitive and independent of sample quality than either virus isolation or FAT, and it is faster than virus isolation. The sample preparation method is simple with few steps involved. There are no extra post-amplification blotting/hybridisation steps and the assay is not based on a nested PCR strategy that might otherwise exacerbate the problem of oversensitivity/contamination in the routine use of such a test in a diagnostic laboratory. This assay would permit discrimination between those animals naturally infected with wild type BHV1 and those vaccinated with tk-BHV1 strains.  相似文献   

Public health aspects of toxoplasmosis     

K W Walls  M G Schultz 《Journal of the American Veterinary Medical Association》1968,153(12):1775-1779

  相似文献   

Hemolysin of Mycoplasma pneumoniae: tentative identification as a peroxide   总被引：14，自引：0，他引：14  

N L Somerson  B E Walls  R M Chanock 《Science (New York, N.Y.)》1965,150(693):226-228

Mycoplasma pneumoniae produces a soluble hemolysin active against guinea pig erythrocytes. This hemolysin appears to be a peroxide, since catalase or peroxidase inhibits its activity. The action of catalase and peroxidase is specific, since heating the enzymes abolishes their effect on the hemolysin. In addition, 3-amino- 1,2,4-triazole, a potent inhibitor of catalase, reverses the inhibitory effect of the enzyme. The hemolysin of M. laidlawii is also a peroxide. The hemolysins of M. pneumoniae and M. laidlawii seem unique for microbial organisms since the bacterial hemolysins which have been described have been protein or lipid in nature.  相似文献   

Transitions between blocked and zonal flows in a rotating annulus with topography     

ER Weeks  Y Tian  JS Urbach  K Ide  HL Swinney  M Ghil 《Science (New York, N.Y.)》1997,278(5343):1598-1601

The mid-latitude atmosphere is dominated by westerly, nearly zonal flow. Occasionally, this flow is deflected poleward by blocking anticyclones that persist for 10 days or longer. Experiments in a rotating annulus used radial pumping to generate a zonal jet under the action of the Coriolis force. In the presence of two symmetric ridges at the bottom of the annulus, the resulting flows were nearly zonal at high forcing or blocked at low forcing. Intermittent switching between blocked and zonal patterns occurs because of the jet's interaction with the topography. These results shed further light on previous atmospheric observations and numerical simulations.  相似文献