Sea urchin sperm chromatin contains forms of H1, H2A, and H2B which differ from those present in adult tissues. We have delineated some effects of the variant H2A and H2B on chromatin by study of the structure of the core particle from Strongylocentrotus purpuratus sperm. The particle contains 145 base pairs of DNA and equal amounts of the four smaller histones. It sediments at 11 S and has a c...

Using the core collection of Web Science and literature CNKI as data sources, this study uses Citespace knowledge map analysis tool to analyze annual publication volume, author group, organization, keyword clustering, emergence heavy metals in Bohai Sea sediments. Then explore research status, hotspots, future development trends The organization with most publications is Chinese Academy Science...

Introduction: The 3.8 km Steinheim Basin [1] in SW Ger-many is a complex impact crater with central uplift thought to have formed simultaneously with the 24 km and 14.4 Ma Ries crater [2] by the impact of a double asteroid. The crater is hosted by a sequence of Triassic to Upper Jurassic sedimentary rocks [1]. The Steinheim Basin exhibits an almost primary crater morphology , intensely brecciat...

The study investigated the composition and content of Σ15PAH in surface core sediments from Dachan Bay (DCB) Shenzhen city discussed effects urban development regional energy structure on marine environment through spatial distribution, vertical profile, sources Σ15PAH. results indicated that concentrations DCB ranged between 299 ng/g 2336 65 994 sediments. horizontal distribution PAHs with dec...

Reactive Fe(III) oxides in gravity-core sediments collected from the East China Sea inner shelf were quantified by using three selective extractions (acidic hydroxylamine, acidic oxalate, bicarbonate-citrate buffered sodium dithionite). Also the reactivity of Fe(III) oxides in the sediments was characterized by kinetic dissolution using ascorbic acid as reductant at pH 3.0 and 7.5 in combinatio...

BISHOP, M.J.; PETERSON, C.H.; SUMMERSON, H.C.; LENIHAN, H.S., and GRABOWSKI, J.H., 2006. Deposition and long-shore transport of dredge spoils to nourish beaches: impacts on benthic infauna of an ebb-tidal delta. Journal of Coastal Research, 22(3), 530–546. West Palm Beach (Florida), ISSN 0749-0208. Dredged materials from maintenance and deepening of inlets on coastal barriers are typically tran...

[1] In the New Jersey Coastal Plain, a silty to clayey sedimentary unit (the Marlboro Formation) represents deposition during the Paleocene-Eocene thermal maximum (PETM). This interval is remarkably different from the glauconitic sands and silts of the underlying Paleocene Vincentown and overlying Eocene Manasquan Formation. We integrate new and published stable isotope, biostratigraphic, litho...

We studied a complete Holocene sediment record from shallow (zmax = 9.7 m) Lake Harris, Florida (USA) to infer the historical development of the lake and its current eutrophic status. We used (210)Pb and (14)C to date the 5.9-m sediment sequence (core LH-6-13) and determined accumulation rates for bulk sediment, organic matter, calcium carbonate, phosphorus fractions and biogenic silica fractio...

An understanding of the carbon cycle within arctic sediments requires discrimination between the terrigenous and marine components of organic carbon, insight into the removal mechanisms for labile carbon during burial and appreciation of shelf-to-basin processes. Using a large data set of multiple molecular organic markers (alkanes, alkanols, sterols, saturated and unsaturated fatty acids, dica...

How entire microbial communities are structured across stratified sediments from the historical standpoint is unknown. The Baltic Sea is an ideal research object for historical reconstruction, since it has experienced many fresh- and brackish water periods and is depleted of dissolved oxygen, which increases the sediment's preservation potential. We investigated the bacterial communities, chemi...