Phylogeography of North American herbaceousSmilax(Smilacaceae): Combined AFLP and cpDNA data support a northern refugium in the Driftless Area

2013 ◽  
Vol 100 (4) ◽  
pp. 801-814 ◽  
Author(s):  
Pan Li ◽  
Mimi Li ◽  
Yin Shi ◽  
Yunpeng Zhao ◽  
Ying Wan ◽  
...  
1998 ◽  
Vol 42 (5) ◽  
pp. 1274-1277 ◽  
Author(s):  
Peter C. Fuchs ◽  
Arthur L. Barry ◽  
Steven D. Brown

ABSTRACT Clinafloxacin was more active than ciprofloxacin against 4,213 aerobic and facultative anaerobic bacterial isolates from 10 medical centers, as tested by broth microdilution and disk diffusion methods. The percentage of 201 anaerobes susceptible to clinafloxacin by broth microdilution was comparable to cefoxitin. Our data support the proposed disk diffusion interpretive criteria for aerobic bacteria with 5-μg clinafloxacin disks.


1980 ◽  
Vol 58 (17) ◽  
pp. 1923-1928 ◽  
Author(s):  
P. B. Wendler ◽  
A. R. Gotlieb ◽  
D. R. Bergdahl

The Asian, European, and North American serotypes of Gremmeniella abietina were compared with 27 Vermont isolates using gel double diffusion and intragel cross absorption tests. An intermediate serotype, between the North American and European serotypes, was shown by means of cross absorption with antiserum prepared in response to a Vermont isolate. The majority of Vermont isolates resembled the Vermont intermediate in serological reaction, three resembled the European serotype, and two were of unknown serotypes. The serological data support possible hybridization between G. abietina isolates in Vermont as well as the identification of a new serotype in Vermont.


Author(s):  
George C. Ruben ◽  
Kenneth A. Marx

In vitro collapse of DNA by trivalent cations like spermidine produces torus (donut) shaped DNA structures thought to have a DNA organization similar to certain double stranded DNA bacteriophage and viruses. This has prompted our studies of these structures using freeze-etch low Pt-C metal (9Å) replica TEM. With a variety of DNAs the TEM and biochemical data support a circumferential DNA winding model for hydrated DNA torus organization. Since toruses are almost invariably oriented nearly horizontal to the ice surface one of the most accessible parameters of a torus population is annulus (ring) thickness. We have tabulated this parameter for populations of both nicked, circular (Fig. 1: n=63) and linear (n=40: data not shown) ϕX-174 DNA toruses. In both cases, as can be noted in Fig. 1, there appears to be a compact grouping of toruses possessing smaller dimensions separated from a dispersed population possessing considerably larger dimensions.


2020 ◽  
Vol 29 (2) ◽  
pp. 259-264 ◽  
Author(s):  
Hasan K. Saleh ◽  
Paula Folkeard ◽  
Ewan Macpherson ◽  
Susan Scollie

Purpose The original Connected Speech Test (CST; Cox et al., 1987) is a well-regarded and often utilized speech perception test. The aim of this study was to develop a new version of the CST using a neutral North American accent and to assess the use of this updated CST on participants with normal hearing. Method A female English speaker was recruited to read the original CST passages, which were recorded as the new CST stimuli. A study was designed to assess the newly recorded CST passages' equivalence and conduct normalization. The study included 19 Western University students (11 females and eight males) with normal hearing and with English as a first language. Results Raw scores for the 48 tested passages were converted to rationalized arcsine units, and average passage scores more than 1 rationalized arcsine unit standard deviation from the mean were excluded. The internal reliability of the 32 remaining passages was assessed, and the two-way random effects intraclass correlation was .944. Conclusion The aim of our study was to create new CST stimuli with a more general North American accent in order to minimize accent effects on the speech perception scores. The study resulted in 32 passages of equivalent difficulty for listeners with normal hearing.


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