Results 1 - 10 of 147 for late embryo within all areas of the EPA. Only web pages are included. Search all document formats.

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Page Title | About the Gulf Ecology Division | US EPA11-23-2009
However, combined survival in control embryos and larvae, and those exposed to respective teratogens, were not ... 5 of 6 tests, except the 2- to 4-cell embryos exposed to 2,4-DNP.
http://www.epa.gov/ged/publica/cabanc38.htm (HTML)
Final Report | Environmentally-Mediated Endocrine Disruption in Estuarine Crustaceans: A 3-Taxon Multi-Generational Study of Sediment-Associated EDC Effects from the Genetic to Population Levels08-04-2004
... assay is capable of differentiating 20HE titers between early and late embryo developmental stages for both crustacean species... Semiquantification of Embryo Yolk Confocal laser-scanning microscopy (CLSM) represents a powerful but ...
http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)
Page Title | About the Gulf Ecology Division | US EPA11-23-2009
... 16S rDNA amplicons from bacteria in water samples collected during late summer 2001 to late spring 2002 were produced by denaturing gradient gel electrophoresis (DGGE ...
http://www.epa.gov/ged/publica/cabanc25.htm (HTML)
Wildlife | Research Projects | Endocrine Disruptors Research | Science Topics | NCER | ORD | US EPA10-03-2007
... in any measures used to assess thyroid function in chicken embryos exposed to PCB 126 and 77 in the laboratory... to be important in orchestrating discrete processes in early and late embryo development of daphnids.
http://www.epa.gov/endocrine/wildlife.html (HTML)
Wildlife | Research Projects | Endocrine Disruptors Research | Science Topics | NCER | ORD | US EPA10-03-2007
... in any measures used to assess thyroid function in chicken embryos exposed to PCB 126 and 77 in the laboratory... to be important in orchestrating discrete processes in early and late embryo development of daphnids.
http://www.epa.gov/ncer/science/endocrine/wildlife.html (HTML)
Page Title | About the Gulf Ecology Division | US EPA11-23-2009
Effects of Aroclor 1254 on Laboratory-Reared Embryos and Fry of Sheepshead Minnows (Cyprinodon variegatus... Fertilization was not affected but significantly fewer embryos developed in the 10.0 µg/liter concentration, and fewer fry ...
http://www.epa.gov/ged/publica/keycb3.htm (HTML)
Page Title | About the Gulf Ecology Division | US EPA11-23-2009
Abundance of pinfish and Atlantic croakers was highest in late spring and early summer... of Sheepshead Minnows: Effect on Fertilization Success and Survival of Embryos and Fry.
http://www.epa.gov/ged/publica/cabanc27.htm (HTML)
Page Title | About the Gulf Ecology Division | US EPA11-23-2009
The fish embryo test showed no toxicity at 1% concentrations, slight toxicity at ... The 12-d assay included development from tissue cap stage embryos (late gastrula) through 2-days post-hatch.
http://www.epa.gov/ged/publica/cabprj25.htm (HTML)
1999 Annual Report | Metabolic Androgenization of Invertebrates by Endocrine-Disrupting Chemicals
Six stages of embryo development were readily discerned: (1) cleavage, (2) gastrulation, (3) early organogenesis, (4) mid-organogenesis, (5) late organogenesis, and (6) neonatal ...
http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)
Final Report | Field and Laboratory Studies of the Effects of Polychlorinated Biphenyls and Other Persistent Organic Pollutants on Thyroid Function During Avian Development01-21-2004
... egg dosing and incubation, as well as the sampling of embryos, was done in Dr... 1998, 1999, and 2000, in Relation to Yolk Sac (for Embryos) and Liver (for Prefledglings) PCB Concentrations.
http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)

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