Evaluation of urethane snow plow blades as an alternative to rubber blades. Final report.

Virginia Department of Transportation, Richmond

Raised pavement markers at hazardous locations. Final report.

Mode of access: Internet.

Evaluation of raised snowplowable pavement markers. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

Snowplowable raised reflective pavement markers at hazardous locations in New Jersey.

Federal Highway Administration, Implementation Division, Washington, D.C.

Evaluation of snowplowable raised reflective pavement markers in New Jersey. Final report.

Federal Highway Administration, Washington, D.C.

Grooved stripes for plow-resistant wet-night lane delineation. Phase II. Recessed reflector delineation. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Genetic evidence for natural hybridization between Red Snow Crab (Chionoecetes japonicus) and Snow Crab (Chionoecetes opilio) in Korea

Both red snow crab (Chionoecetes japonicus Rathbun, 1932) and snow crab (Chionoecetes opilio Fabricius, 1788) are commercially important species in Korea. The geographical ranges of the two species overlap in the East Sea, where both species are fished commercially. Morphological identification of the two species and putative hybrids can be difficult because of their overlapping morphological characteristics. The presence of putative hybrids can affect the total allowable catch (TAC) of C. japonicus and C. opilio, and causes problems managing C. japonicus and C. opilio wild resources. To date, however, no natural hybridization has been reported between C. japonicus and C. opilio, despite their overlapping distributions along the coast of the East Sea. In this study, the internal transcribed spacer (ITS) region of major ribosomal RNA genes from the nuclear genome and the cytochrome oxidase I (CO I) gene from the mitochondrial genome were sequenced to determine whether natural hybridization occurs between the two species. Our results revealed that all putative hybrids identified using morphological traits had two distinct types of ITS sequences corresponding to those of both parental species. Mitochondrial CO I gene sequencing showed that all putative hybrids had sequences identical to C. japonicus. A genotyping assay based on single nucleotide polymorphisms in the ITS1 region and the CO I gene produced the most efficient and accurate identification of all hybrid individuals. Molecular data clearly demonstrate that natural hybridization does occur between C. japonicus and C. opilio, but only with C. japonicus as the maternal parent.

Twins Fred and Beatrice Herz in the snow on their twenty-fifth birthday.

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Hedwig Elly Landsberger and Kate with two unidentified men on sleds in the snow; Berlin.

Digital Image

Twins Fred and Beatrice Herz in the snow on their twenty-fifth birthday.

Digital Image

Lieselotte Hochherr standing in the snow Portraits; Children

Handwritten information on back of photo(s).

Jerusalem Under Snow

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Afraid of Snow Man

Digital image