Publications of the Coast and Geodetic Survey.

"Information leaflet."

State of the Coast Report, San Diego Region : Coast of California Storm and Tidal Waves Study, Volume II-Appendices-Final.

Final report.

Sailing directions for the coast of Syria from ancient Joppa to the Gulf of Iskenderoon : to accompany chart and views of the coast /

Addenda in back (pages 25-29)

The pearl of Orr's island, a story of the coast of Maine.

Mode of access: Internet.

Pollution by oil of the coast waters of the United States : preliminary report /

Mode of access: Internet.

Report of the superintendent of the Coast Survey, showing the progress of the Survey during the year ...

Vols. for 1865-1876/77 have title: Report of the superintendent of the United States Coast Survey, showing the progress of the Survey during the year ...

A new and accurate description of the coast of Guinea, divided into the Gold, the Slave, and the Ivory Coasts : containing a geographical, political and natural history of the kingdoms and countries : with a particular account of the rise, progress and present condition of all the European settlements upon that coast : and the just measures for improving the several branches of the Guinea trade : illustrated with several cutts /

Includes index.

Promotion of commissioned officers of Coast and Geodetic Survey : Executive hearing before the Committee on the Merchant Marine and Fisheries, House of Representatives, Seventy-seventh Congress, first session, on H.R. 5837, a bill to regulate the distribution and promotion of commissioned officers of the Coast and Geodetic Survey, and for other purposes. November 6, 1941.

Schuyler Otis Bland, chairman.

Distribution of Ivory Coast microtektite layer

During the present study the Ivory Coast microtektite layer was found in cores from five equatorial Atlantic sites, bringing the total number of Ivory Coast microtektite-bearing cores to eleven. The strewn field appears to be restricted to between 9°N and 12°S latitude. There is a general increase in the concentration of microtektites towards the Bosumtwi crater, which is generally thought to be the source of the Ivory Coast tektites. The relationship between the onset of the Jaramillo subchron and the Ivory Coast microtektite layer has been investigated in six cores. A plot of the difference in depth between the base of the Jaramillo subchron and the microtektite layer versus sediment accumulation rate was used to determine the average post-depositional remanent magnetization (PDRM) acquisition depth and the age difference between the onset of the Jaramillo subchron and the deposition of the microtektites. Assuming that the PDRM acquisition depth does not vary with sediment accumulation rate, we find that the average PDRM acquisition depth is 7 cm and that the microtektites were deposited approximately 8 ky after the onset of the Jaramillo subchron. This indicates that the impact responsible for the Ivory Coast tektites and microtektites could not be causally related to the geomagnetic reversal at the base of the Jaramillo subchron.

Bioprospecção de extratos metanólicos de macroalgas marinhas do litoral do Rio Grande do Norte: avaliação das atividades anticoagulante, antioxidante e antiproliferativa

Seaweeds are organisms known to exhibit a variety of biomolecules with pharmacological properties. The coast of Rio Grande do Norte has over 100 species of seaweeds, most of them not yet explored for their pharmacological potential. Sugars and phenolic compounds are the most studied of these being assigned a range of biological properties, such as anticoagulant , antiinflammatory, antitumor and antioxidant activities. In this work, we obtained methanolic extracts from thirteen seaweeds of the coast of Rio Grande do Norte (Dictyota cervicornis; Dictiopterys delicatula; Dictyota menstruallis; D. mertensis; Sargassum filipendula; Spatoglossum schröederi; Acanthophora specifera; Botryocladia occidentalis; Caulerpa cupresoides; C. racemosa; C. prolifera; C. sertularioides e Codium isthmocladum). They were evaluated as anticoagulant and antioxidant drugs, as well as antiproliferative drugs against the tumor cell line HeLa. None of the methanolic extracts showed anticoagulant activity, but when they were evaluated as antioxidant drugs all of extracts showed antioxidant activity in all tests performed (total antioxidant capacity, sequestration of superoxide and hydroxyl radicals, ferric chelation and reductase activity), especially the algae D. mentrualis, D. cilliolata and C. prolifera, who had the greatest potential to donate electrons.In addition, the ability of iron ions chelation appears as the main antioxidant mechanism of the methanolic extracts of these seaweeds mainly for the extract of the C. racemosa seaweed, which reached almost 100% activity. In the MTT assay, all extracts showed inhibitory activity at different levels againts HeLa cells. Moreover, D. cilliolata (MEDC) and D. menstrualis (MEDM) extracts showed specific activity to this cell line, not inhibiting the viability of 3T3 normal cell line, so they were chosen for detailing the antiproliferative mechanism of action. Using flow cytometry, fluorescence microscopy and in vitro assays we demonstrated that MEDC and MEDM induced apoptosis in HeLa cells by activation of caspases 3 and 9 and yet, MEDC induces cell cycle arrest in S phase. Together, these results showed that the methanolic extracts of brown seaweed D. menstrualis and D. cilliolata may contain agents with potential use in combatting cells from human uterine adenocarcinoma. This study also points to the need for more in-depth research on phytochemical and biological context to enable the purification of biologically active products of these extracts

Geochemical, Sedimentological And Remote Sensing Studies Of Kayamkulam Estuary, South West Coast Of India- A Gis Approach

In this study, an attempt has been made to find the textural, geochemical, sedimentological characteristics of sediments and water phases of the kayamkulam estuary located in the Southwest coast of Kerala, besides the impact of gas based thermal power plant located at the northern part of the estuary. Estuaries are an important stage in the transport of the solid weathering product of the earth’s crust. These weathered products or sediments are complex mixtures of a number of solid phases that may include clays, silica, organic matter, metal oxides, carbonates, sulfides and a number of minerals. Studies on the aquatic systems revealed the fact that it posses severe ecological impairments due to heavy discharge of sediments from 44 rivers, the continued disposal of pollutants rich materials from industries, sewage channels, agricultural areas and retting yards

Sea Level Variations during the Late Quaternary and Coastal Evolution along the Northern Kerala, South West of India

In the present investigation, an attempt is made to document various episodes of transgression and regression during the late Quaternary period from the study of coastal and shelf sequences extending from the inland across the beach to the shelf domain. Shore parallel beach ridges with alternating swales and occurrence of strand line deposits on the shelf make the northern Kerala coast an ideal natural laboratory for documenting the morpho-dynamic response of the coast to the changing sea level. The objectives of the study are lithographic reconstruction of environments of deposition from the coastal plain and shelf sequences; documentation of episodes of transgression and regression by studying different coastal plain sequences and shelf deposits and evolve a comprehensive picture of late Quaternary coastal evolution and sea level changes along the northern Kerala coast by collating morphological, lithological and geochronological evidences from the coastal plain and shelf sequences. The present study is confined to two shore-normal east-west trending transects, Viz. Punjavi and Onakkunnu, in the northern Kerala coast.