Gravid adult female Euphausia pacifica were collected off Newport, Oregon, USA and transferred to the laboratory, where females spawned eggs, eggs hatched, and larvae were reared at 10.5 degrees C. We fed 4 cohorts of larvae to excess with a combination of phytoplankton species and monitored them daily until they...
Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Graphene and its derivatives are two-dimensional hexagonal lattices that possess desirable physicochemical properties leading to an ever-expanding list of industrial and biomedical uses. Graphene oxides (GOs) are becoming a popular graphene alternative and while there have been human safety studies, investigations of developmental toxicity are lacking. The use of distinct...
miRNA-guided cleavage initiates entry of primary transcripts into the trans-acting siRNA (tasiRNA) biogenesis pathway involving RNA-DEPENDENT RNA POLYMERASE6 (RDR6), DICER-LIKE 4 (DCL4), and SUPPRESSOR OF GENE SILENCING3 (SGS3). Arabidopsis thaliana TAS1 and TAS2 families yield tasiRNA that form through miR173- guided initiation cleavage on the 5’ side of the siRNA-generating...
CTIP2 is a C2H2 zinc finger transcription factor that plays important yet poorly understood roles in mouse development. CTIP2 is known to be highly expressed in the central nervous system, skin and T lymphocytes during embryogenesis. CTIP2-null mice die perinatally of unknown causes and exhibit defects in multiple organ systems...
The Polycomb group (PcG) of genes of Drosophila melanogaster Meigen are involved in developmental regulation through chromatin remodeling. Homologs of PcG genes have been identified in both plant and animal species. In this study, we detail the identification and characterization of Triticum enhancer of zeste 1 (Tez1), a homolog of...
Calow (1983) realized that differences between parasites and their free-living
relatives can be explained by the differences in nutrient richness. I
propose a model that is based on Calow's idea which identifies the relative
position of different trophic strategies (e.g. predation, grazing, parasitism and
others) based on (1) the differences...
Polycyclic aromatic hydrocarbons (PAHs) and oxygen-substituted PAHs (OPAHs) are environmental contaminants present in urban air, dust, soil and water resulting from incomplete combustion of organic materials or fossil fuels; found in crude oil and coal; and formed through photoxidation or biotransformation of microbial. It is widely recognized that PAHs pose...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment as components of fossil fuels and by-products of combustion. Defining toxicity mechanisms for this large family of multi-ring structures and substituted derivatives is a substantial challenge. Several PAHs, such as benzo(a)pyrene (BaP), are mutagenic, toxic to wildlife, and classified as probable...