Results 31 to 40 of about 352,609 (153)

Coupled anoxic nitrification/manganese reduction in marine sediments [PDF]

, 1999
Pore water and solid phase distributions of oxygen, manganese, and nitrogen from hemipelagic and shelf sediments sometimes indicate a close coupling between the manganese and nitrogen redox cycles.
Franck Gilbert, Robert C Aller, Aller, Robert Curwood, Gilbert, Franck, Stefan Hulth, Hulth, Stefan   +5 more
core   +1 more source

Prediction of Earthquake Death Toll Based on Principal Component Analysis, Improved Whale Optimization Algorithm, and Extreme Gradient Boosting

Applied Sciences
Earthquakes, as one of the most destructive natural disasters, often cause significant casualties and severe economic losses. Accurate prediction of earthquake fatalities is of great importance for pre-disaster prevention and mitigation planning, as well
Chenhui Wang, Xiaotao Zhang, Xiaoshan Wang, Guoping Chang   +3 more
doaj   +1 more source

Short-term fate of phytodetritus in sediments across the Arabian Sea Oxygen Minimum Zone [PDF]

, 2007
The short-term fate of phytodetritus was investigated across the Pakistan margin of the Arabian Sea at water depths ranging from 140 to 1850 m, encompassing the oxygen minimum zone (~100–1100 m).
Middelburg, J.J., Levin, L. A., Andersson, J.H., Woulds, C., G. L. Cowie, L. A. Levin, Cowie, G.L., Levin, L.A., Soetaert, K., Middelburg, J. J., J. H. Andersson, Schwartz, M., Cowie, Gregory, K. Soetaert, M. Schwartz, J. J. Middelburg, Andersson, J. H., C. Woulds, Cowie, G. L.   +18 more
core   +2 more sources

Analysis of solid tide recording capacity of Trillium Horizon 360 ultra-broadband seismometer at Chongli seismic station

地震科学进展
Long-period low-frequency waves in seismic records contain crucial information regarding the adjustment of crustal stress states and the mechanical properties of the medium and thus hold significant research value. However, their study was limited by the
Xiaogang Zhang, Kexin Wei, Shuang Liu, Kangda Yin, Xueying Li   +4 more
doaj   +1 more source

Metal Concentrations in Sediments of the Alinsaog River, Santa Cruz, Zambales, Central Luzon, Philippines [PDF]

Journal of Health and Pollution, 2020
Background. Efforts are needed to evaluate heavy metal concentrations in aquatic sediments which serve as repositories and as sources of contamination of other habitats. Objectives. The present study assessed temporal changes in the pH, particle size and
Rowena R. Sazon, Veronica P. Migo
doaj   +1 more source

Evaluating the influence of lake morphology, trophic status and diagenesis on geochemical profiles in lake sediments [PDF]

, 2010
Recent geochemical studies provide evidence that changes in vertical distributions of nutrients in lake sediments are driven by anthropogenic activities, based primarily on trends of increasing concentrations in upper sediment layers.
Pilditch, Conrad A., Trolle, Dennis, Hamilton, David P., Dennis Trolle, David P. Hamilton, Conrad A. Pilditch   +5 more
core   +1 more source

Organically bound tritium in sediments from the Severn Estuary, UK [PDF]

, 2006
Amersham plc, now GE Healthcare, has discharged both organically bound tritium (OBT) and tritiated water (HTO) into the Severn estuary since 1981. The OBT component of these discharges results in elevated tritium (3H) activities in the sediments and ...
Morris, J.E.
core   +1 more source

Velocity structure tomography analysis in southern Hebei Province

地震科学进展
The destruction of cratons is one of the key research objects of geophysicists. According to China Earthquake Networks Center, small and medium-sized earthquakes have occurred more frequently in southern Hebei in recent years than before.
Shi Wang, Yi Zhou, Sisi Wang, Xiaolei Liu   +3 more
doaj   +1 more source

Degradation of Hydrocarbons and Heavy Metal Reduction by Marine Bacteria in Highly Contaminated Sediments

Microorganisms, 2020
Investigations on the ability of bacteria to enhance removal of hydrocarbons and reduce heavy metal toxicity in sediments are necessary to design more effective bioremediation strategies. In this study, five bacterial strains, Halomonas sp.
Filippo Dell’Anno, Christophe Brunet, Leonardo Joaquim van Zyl, Marla Trindade, Peter N. Golyshin, Antonio Dell’Anno, Adrianna Ianora, Clementina Sansone   +7 more
doaj   +1 more source

Optimization of Asymmetric Magnetic Recording Heads Inclination Angle and Study the Characteristics for a Higher Bit Density Recording of HDD

Science Journal of University of Zakho, 2018
This paper study the optimization of the asymmetric magnetic recording heads, the calculations demonstrate sharp field gradient performance for both the horizontal, and vertical field components for this type magnetic recording heads at large inclination
Ammar I. Idrees
doaj   +1 more source