scholarly journals Quality assessment of routine nuchal translucency measurements: a North American laboratory perspective

2008 ◽  
Vol 10 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Glenn E Palomaki ◽  
Louis M Neveux ◽  
Alan Donnenfeld ◽  
Jo Ellen S Lee ◽  
Geraldine McDowell ◽  
...  
Keyword(s):  
Quality Assessment ◽  
North American ◽  
Nuchal Translucency ◽  
American Laboratory

Taxonomy, ultrastructure, and distribution of some gomphonemoid diatoms (Bacillariophyceae: Gomphonemataceae) from rivers in the United States

1999 ◽  
Vol 77 (5) ◽  
pp. 686-705 ◽  
Author(s):  
J P Kociolek ◽  
J C Kingston
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
North American ◽  
Large Scale ◽  
Taxonomic Status ◽  
Water Quality Assessment ◽  
The United States ◽  
Great Promise ◽  
Continental Scale ◽  
National Water

Using the continental-scale collections of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program, we examined selected members of the family Gomphonemataceae to expand the current state of knowledge of diatom taxonomy, morphology, and distribution. Ten taxa in the genera Gomphonema, Gomphoneis, and Gomphosphenia are examined. The taxonomic status of two taxa is revised, and one new species is described. Two new features are described for the genus Gomphonema: slit-like areolae and ridge-like flaps or flanges on pseudosepta. Many North American gomphonemoid species appear to be restricted to certain geographic regions; the differences between western and eastern North America are striking. Trained analysts have had difficulty identifying and discriminating many of these taxa. We believe that this difficulty, in large part, results from our poor knowledge of the North American flora. Large-scale monitoring programs such as NAWQA, when teamed up with research organizations with common interests, hold great promise to expand our knowledge of the biodiversity of North American ecosystems.Key words: biogeography, Gomphoneis, Gomphonema, Gomphosphenia, National Water-Quality Assessment (NAWQA) Program, taxonomy; ultrastructure.

Selection and quality assessment of Landsat data for the North American forest dynamics forest history maps of the US

2016 ◽  
Vol 9 (10) ◽  
pp. 963-980 ◽  
Author(s):  
Karen Schleeweis ◽  
Samuel N. Goward ◽  
Chengquan Huang ◽  
John L. Dwyer ◽  
Jennifer L. Dungan ◽  
...  
Keyword(s):  
Quality Assessment ◽  
North American ◽  
Forest Dynamics ◽  
Forest History ◽  
Landsat Data ◽  
The North ◽  
The Us

Quality assessment in prospective nuchal translucency screening for Down syndrome

2001 ◽  
Vol 18 (6) ◽  
pp. 641-644 ◽  
Author(s):  
K. R. Wøjdemann ◽  
M. Christiansen ◽  
K. Sundberg ◽  
S. O. Larsen ◽  
A. Shalmi ◽  
...  
Keyword(s):  
Down Syndrome ◽  
Quality Assessment ◽  
Nuchal Translucency

A North American multilaboratory study of CD4 counts using flow cytometric panleukogating (PLG): A NIAID-DAIDS Immunology Quality Assessment Program Study

2008 ◽  
Vol 74B (S1) ◽  
pp. S52-S64 ◽  
Author(s):  
Thomas N. Denny ◽  
Rebecca Gelman ◽  
Michele Bergeron ◽  
Alan Landay ◽  
Lee Lam ◽  
...  
Keyword(s):  
Quality Assessment ◽  
North American ◽  
Cd4 Counts ◽  
Assessment Program ◽  
Flow Cytometric
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