Marine science

This study proposes the application of Ensemble Decision Tree Boosted (EDT Boosted) model for forecasting the surface chloride concentration of marine concrete Cs. A database of 386 experimental results was collected from 17 different sources covering twelve variables was used to build and verify the predictive power of the EDT model.

12p viengfa 28-10-2024 5 2   Download

Freshwater aquaculture has played key roles in the livelihood development of farm households in the Red River Delta through freshwater fish ponds, rice-and-fish, and marine cage culture. This study aimed to analyze the marketing channels of freshwater aquaculture fish in Hai Duong province.

15p vibecca 01-10-2024 5 2   Download

Salinity is one of the most devastating abiotic stresses limiting crop production. Considering this issue, a pot experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the boro season (2017-2018) using two rice (Oryza sativa L.) varieties, namely BRRI dhan28 (salt sensitive) and BRRI dhan47 (salt tolerant), to assess the effects of varied salinity levels on the growth and the performance of the rice varieties under salt stress conditions.

10p vibecca 01-10-2024 1 1   Download

Aquaculture production in China has made large contributions to the global total volume of fish for human consumption. The developed mariculture fish species large yellow croaker (Pseudosciaena crocea) is the highest economic marine fish of China. The paper aims to underpin the most significant investigations and highlight the future prospects for the LYC aquaculture industry in China.

15p vibecca 01-10-2024 5 2   Download

This study is conducted based on the hypothesis of an accident from Fengcheng NPP with an incident level of 7, equivalent to the Fukushima accident. A modeling system has been established with different failure scenarios based on the Delft3D model. The research results will provide more insights into the extent and scope of the incident and the impact of meteorological conditions and dynamics on the propagation and distribution of radiation when an incident occurs.

17p dianmotminh02 03-05-2024 8 2   Download

The focus of this thesis was to study the chemotaxonomic relationship of selected southern Australian marine brown algae of the genera Cystophora and Sargassum. Consequently, this resulted in the isolation and structure elucidation of six new terpenoids from two southern Australian marine brown algae Cystophora moniliformis and Sargassum fallax together with 10 previously reported natural products. As a result of the re-isolation of these known secondary metabolites, updated and complete structural characterisation data could be provided for the first time for 7 of these compounds.

132p runthenight07 01-03-2023 7 3   Download

A belt of Upper Eocene–Lower Oligocene marine sedimentary rocks extends from Kıyıköy on the Black Sea coast to Pınarhisar in the Thrace Basin, suggesting a marine connection between the Black Sea and the Thrace Basin during this period. The Cenozoic succession of this marine corridor was studied in the vicinity of Kıyıköy along two measured stratigraphic sections.

15p tanmocphong 29-01-2022 12 1   Download

The Late Pleistocene-Holocene evolution of the Adapazarı Basin was investigated using the stratigraphy, geometry, and absoluteluminescence dating of the 4-step fluvial terrace staircases of the Sakarya River. The results revealed that the fluvial cycle was primarily related to relative sea level changes of the Black Sea. The initiation of deposition and the abandonment ages of the terraces indicated relative high stands during marine isotope stage (MIS) 5a (~84–72 ka), 3 (40–30 ka), and 1 (9 ka-recent).

23p tanmocphong 29-01-2022 15 1   Download

The timing of the deposition of the well-preserved Quaternary marine terraces in the coastal region of northeastern Turkey are crucial in understanding the Quaternary tectonics of the Pontides. The chronology of raised marine terraces between Trabzon and Rize has remained unrevealed because of chronologic limitations. This study aims to establish chronology for the terrace deposits by applying optically stimulated luminescence (OSL) dating methods using single aliquot regenerative dose (SAR) techniques on quartz grains extracted from marine terraces.

20p tanmocphong 29-01-2022 22 1   Download

High-resolution marine seismic reflection studies on the eastern shelf of the Saros Gulf have revealed the presence of gascharged sediments across a narrow submarine valley incised by the Ganos Fault along the North Anatolian Fault system. Quaternary sediments, accumulated during glacial and interglacial periods through transgressional and progradational units, were controlled by glacio-eustatic sea-level fluctuations and tectonic deformation. The transgressional units made of upward-fining deposits created seals at their tops to form gas accumulation pockets.

20p tanmocphong 29-01-2022 10 1   Download

Diatoms are predominant in marine water and considered to be the most important primary producers in sustaining marine food chains. Three diatom strains were successfully isolated from Giao Thuy mangrove water of the Red River Delta Biosphere Reserve.

7p larachdumlanat127 20-12-2020 13 2   Download

In this paper, we report on the characterizations of a fucoidanase from marine shell Vasticardium flavum, which degrades fucoidan from sea cucumbers Stichopus variegatus, Holothuria spinifera containing α-1→3 glycoside bonds.

10p abcxyz123_02 03-03-2020 13 3   Download

Disulfide pairings and active site residues are highly conserved in secretory phospholipases A2 (PLA2s). However, secretory PLA2 s of marine inverte-brates display some distinctive structural features. In this study, we report the isolation and characterization of a PLA2 from the northern Pacific sea anemone,Urticina crassicornis(UcPLA2), containing a C27N substitution and a truncated C-terminal sequence.

13p mobifone23 21-01-2013 35 3   Download

Subject Geography is the study of variation in the spatial position of natural phenomena and man on Earth.Topics include: The location on Earth and in space, Civilized areas such as national or local city and, The science related to geographical

52p thachthaoxanh 24-08-2011 55 5   Download

Geography is the study of the transformation of spatial location of natural and human phenomena on Earth. Topics include: The location on Earth and in space Civilized areas such as national or local city and Sciences related to geography

37p thachthaoxanh 24-08-2011 87 9   Download