(Table 8.4, Page 220-223) Chemical composition of different growth structures of manganese nodules, SONNE cruise SO78

In the nodule field of the Peru Basin, situated south of the zone of high bioproductivity, a relatively high flux of biogenic matter explains a distinct redox boundary at about 10 cm depth separating very soft oxic surface sediments from stiffer suboxic sediments. Maximum abundance (50 kg/m**2) of diagenetic nodules is found near the calcite compensation depth (CCD), currently at 4250 m. There, the accretion rate of nodules is much higher (100 mm/Ma) than on ridges (5 mm/Ma). Highest accretion rates are found at the bottom of large nodules that repeatedly sink to a level immediately above the redox boundary. There, distinct diagenetic growth conditions prevail and layers of dense laminated Mn oxide of very pure todorokite are formed. The layering of nodules is mainly the result of organisms moving nodules within the oxic surface sediment from diagenetic to hydrogenetic environments. The frequency of such movements is much higher than that of climatic changes. Two types of nodule burial occur in the Peru Basin. Large nodules are less easily moved by organisms and become buried. Consequently, buried nodules generally are larger than surface nodules. This type of burial predominates in basins. At ridges where smaller nodules prevail, burial is mainly controlled by statistical selection where some nodules are not moved up by organisms.

Zooplankton abundance and vertical fluxes of sedimentary matter and chemical elements in the White Sea from 15 to 24 June, 2000

A multidisciplinary oceanographic survey of the White Sea was carried out in the Gorlo Straight, Basin, and Kandalaksha Bay regions including estuaries of Niva, Kolvitza and Knyazhaya rivers. Hydrophysical study in the northern part of the Basin revealed long-lived step-like structures and inversions in vertical profiles of temperature and salinity, which formed due to tidal mixing of saline and cold Barents Sea waters and warmer White Sea waters in the Gorlo Straight. Biological studies revealed the main features of spatial distribution, as well as qualitative and quantitative composition of phyto- and zooplankton in all studied areas; tolerance of main zooplankton species to fresh water influence in estuaries was shown. Study of suspended matter in estuaries clearly demonstrated physicochemical transformations of material supplied by the rivers. Data on vertical particle flux in the deep part of the Kandalaksha Bay showed difference between the upper and near-bottom layers, which could result from sinking of spring phytoplankton bloom products and supply of terrigenic suspended matter from the nepheloid layer formed by tidal currents.

National Conference on Wood Transportation Structures /

Cover title.

Light truck side structure evaluation. Volume I: overview and conclusions. Final report.

Mode of access: Internet.

Light truck side structure evaluation. Volume II: documentation of occupant seating position and structural components. Final report.

Mode of access: Internet.

Light truck aggressivity study - test report 2: truck-to-car 90 degree left side impact tests. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Durability/corrosion of soil reinforced structures /

"December 1990."

Conference specifications for steel highway bridges, compiled by a Conference Committee composed of State highway officials and the American Railway Engineering Association.

Adopted by the Committee on Bridges and Structures,... as a Tentative revision of the Standard specifications for highway bridges and incidental structures.

An investigation of the slip-casting mechanism as applied to stainless steel powder /

The slip-casting technique, which is successfully employed in the ceramic industry, was utilized to produce sintered stainless steel components experimentally. The procedure used is described, along with an evaluation of the physical and mechanical properties of the samples produced. Specimens were made with properties comparable to those of wrought stainless steel and of cold pressed and sintered steel powder.

Fatigue of curved steel bridge elements : design recommendations for fatigue of curved plate girder and box girder bridges /

Mode of access: Internet.

Radford's cyclopedia of cement construction; a general reference work on up-to-date practice in the manufacture and testing of cements; the selection of concreting materials, tools, and machinery; the proportioning, mixing, and depositing of concrete, and its application to all types and reinforced; together with analysis of the principles of constructive design, cost estimating, and the allied branches of stone and brick masonry and steel construction; based on the practical experience of a large staff of experts in actual construction work ...

"Prepared under the supervision of William A. Radford, editor-in-chief ... Alfred Sidney Johnson ... editor in charge."

Light list.

"CG-159".

Transactions of the American Society for Steel Treating.

Publication suspended Jan. - Oct. 1931.

Resistance of reinforced concrete structures under high intensity loads /

Mode of access: Internet.

Advanced design in structural steel /

Includes bibliographies and index.