中国海洋大学学报·自然科学版杂志

Horizontal Normal Force on Buried Rigid Pipelines in Fluctuant Liquefied Silty Soil

关键词: wave  flume  experiment  fluctuant  liquefied  soil  buried  pipeline  normal  force  

The submarine pipelines that are buried in the Yellow River subaqueous delta can be subject to fluctuant local-liquefied soil caused by storm wave action,possibly causing pipeline damage.An experimental investigation was carried out in a wave flume to study the horizontal normal force on buried rigid pipelines in flu...

Temporal-Spatial Variation of Surface Suspended Matter and Controlling Factors in the Inner Shelf of the East China Sea in Winter

关键词: inner  shelf  of  the  east  china  sea  moderate  resolution  imagine  spectroradiometer  surface  suspended  matter  monthly  distribution  variation  

Based on the observed surface suspended matter in the East China Sea in February 2007 and June 2015,an empirical model was established using L1b’s band 4 data to retrieve surface suspended matter from the Moderate Resolution Imagine Spectroradiometer Terra imagery.The squared correlation coefficient is 0.8358,and th...

Numerical Study on Seasonal Transportation of the Suspended Sediments in the Modern Yellow River Mouth Effected by the Artificial Water and Sediment Regulation

关键词: yellow  river  mouth  artificial  water  and  sediment  regulation  mike  transport  seasonal  variation  

Since 2002,an artificial water and sediment regulation(AWSR)has been carried out,which largely reduced water and sediment discharged from the Yellow River into the Bohai Sea.Although the sediment transport in the Yellow River Mouth(YRM)has been observed and modeled intensively since AWSR,but preferentially for the no...

Responses of Yellow Sea Cold Water Mass to Typhoon Bolaven

关键词: yellow  sea  cold  water  mass  typhoon  current  thermocline  suspended  particulate  matter  

A two-month seabed-mounted observation(YSG1 area)was carried out in the western Yellow Sea Cold Water Mass(YSCWM)using an RDI-300K acoustic Doppler current profiler(ADCP)placed at a water depth of 38 m in late summer,2012.On August 2012,Typhoon Bolaven passed east of YSG1 with a maximum wind speed of 20ms^-1.The wate...

Mechanism of Phase Lag Between Current Speed and Suspended Sediment:Combined Effect of Erosion,Deposition,and Advection

关键词: phase  lag  sediment  transport  critical  shear  stress  suspended  

To retrieve and explain the phase lag between current speed and suspended sediment concentration(SSC),erosion,deposition,and advection were isolated as primary processes of sediment movement in a three-dimensional model.The response time was proved to be one of the reasons for the phase lag,as time is needed for susp...

Counter-Wind Deep Current in the Northern Beibu Gulf in Boreal Winter

关键词: beibu  gulf  numerical  deep  monsoon  wind  momentum  balance  equation  

The Beibu Gulf is at an important geographical location and rich in gas,oil and biological resources.The observed currents showed that the current in the upper layer was opposite to that in the lower layer in boreal winter in the northern Beibu Gulf and it was northeastward in the lower layer.This northeastward curre...

3D Modal Solution for Tidally Induced Lagrangian Residual Velocity with Variations in Eddy Viscosity and Bathymetry in a Narrow Model Bay

关键词: eddy  viscosity  bathymetric  effects  lagrangian  residual  velocity  3d  narrow  bay  

Evaluation of Wind Retrieval from Co-Polarization Gaofen-3 SAR Imagery Around China Seas

关键词: synthetic  aperture  radar  wind  china  seas  

Gaofen-3(GF-3)is the first Chinese space-borne satellite to carry the C-band multi-polarization synthetic aperture radar(SAR).Marine applications,i.e.,winds and waves retrieved from GF-3 SAR images,have been operational since January 2017.In this study,we have collected more than 1000 quad-polarization(vertical-verti...

Modeling the Water-Flushing Properties of the Yangtze Estuary and Adjacent Waters

关键词: water  age  seawater  intrusion  the  yangtze  estuary  numerical  modeling  particle  tracking  algorithm  

As a multi-branch estuary system,the Yangtze Estuary presents distinctive characteristics of hydrodynamic processes through co-action among river runoff,tides,wind-waves,and gravitational circulation.To study the pathways of flushing water along all of the estuary’s branches and analyze their differences,especially ...

Investigation of the Hydrodynamic Performance of a Novel Semi-Submersible Platform with Multiple Small Columns

关键词: platform  multiple  small  columns  hydrodynamic  performance  coupled  dynamic  analysis  

This paper presents a novel semi-submersible(SEMI)platform concept,called the multiple small columns(MSC)SEMI that improves upon the hydrodynamic performance of the conventional SEMI.Unlike the conventional SEMI,the proposed MSC SEMI utilizes multiple small circular columns to support the deck and a large pontoon tha...

Theoretical Analysis of Bearing Capacity of Shallowly Embeded Rectangular Footing of Marine Structures

关键词: upper  bound  analysis  velocity  field  ultimate  bearing  capacity  rectangular  footing  abaqus  

In this paper,the finite element analysis software ABAQUS is used to analyze the ultimate bearing capacity of three-dimensional rectangular footing of marine structures.The deformation law and the failure mode of homogeneous seabed soil beneath the rectangular footing are analyzed in detail.According to the equivalen...

Combined Bearing Capacity of Spudcans on a Double Layer Deposit of Strong-Over-Weak Clays

关键词: combined  bearing  capacity  circular  spudcan  layered  clays  vertical  load  level  strength  ratio  hard  layer  thickness  

An extreme sea storm process can lead to a jack-up rig under the combined loading condition of vertical load(V),horizontal load(H),and moment(M)to have stability problems.This paper presents the analysis of combined bearing capacities of a circular spudcan on layered clays with a strong layer overlying a comparativel...

Mechanistic Study and Kinetic Determination of Cu(II)by the Catalytic Kinetic Spectrophotometric Method

关键词: catalytic  kinetic  method  spectrophotometry  glutathione  potassium  

A highly sensitive and selective catalytic kinetic spectrophotometric method for the determination of Cu(II)is proposed.It is based on the catalytic effect of Cu(II)on the oxidation of glutathione(GSH)by potassium hexacyanoferrate(III)in acidic medium at 25.0℃.The reaction is monitored spectrophotometrically by meas...

Spatial Distribution Assessment and Source Apportionment of Land-Based Pollutant Yield from Qingdao,China

关键词: qingdao  pollutant  yield  pollution  intensity  industrial  structure  

The spatial distribution of chemical oxygen demand(COD)and total nitrogen(TN)yield from Qingdao are studied by comparing pollutant yield amount,densities and spatial aggregation(Getis-Ord indexes)among the land-based pollutant source regions(PSRs)entering the three sub-seas(i.e.the Jiaozhou Bay(JZB),other coastal are...

Evaluation of DNA Damage in the Marine Mussel Crenomytilus grayanus as a Genotoxic Biomarker of Pollution

关键词: genotoxicity  dna  comet  assay  crenomytilus  grayanus  pollution  

Marine pollution affects all life processes in aquatic organisms.The genotoxic effect of pollution on the mussel Crenomytilus grayanus was assessed.Bivalves were collected from the‘clean’(Vostochnaya Cove)and polluted(Nakhodka Bay)areas in the Peter the Great Bay.The degree of DNA damage in C.grayanus was determine...

Molecular Characterization,Expression Profiles,and Immunostimulation Responses of TRAF6 and TAK1 in Japanese Flounder(Paralichthys olivaceus)

关键词: traf6  tak1  paralichthys  olivaceus  cloning  expression  promoter  analysis  immunostimulation  

Tumor necrosis factor receptor-associated factor 6(TRAF6)and transforming growth factor-β-activated kinase 1(TAK1)are two important adaptor molecules in Toll-like receptor(TLR)signaling pathway.In this study,TRAF6(PoTRAF6)and TAK1(PoTAK1)were cloned and characterized in Japanese flounder(Paralichthys olivaceus).The f...

Effects of Temperature and Salinity on Oxygen Consumption and Ammonium Excretion Rate of♀Epinephelus fuscoguttatus×♂E.lanceolatus Juveniles

关键词: temperature  salinity  oxygen  consumption  rate  ammonia  excretion  

Purification and Characterization of a Novel Hydrolase That Can Specifically Degrade the Polysaccharide Isolated from Green Seaweed Ulva prolifera

关键词: characterization  hydrolase  polysaccharide  purification  ulva  prolifera  

The extracellular polysaccharide hydrolase-producing strain EP-1 was isolated from seawater and identified as Paenibacillus pabuli.Furthermore,a homogeneous extracellular polysaccharide hydrolase from Paenibacillus pabuli EP-1 was purified by combining ion-exchange chromatography and size exclusion chromatography wit...

Studies on Factors Influencing Hydrodynamic Characteristics of Plates Used in Artificial Reefs

关键词: artificial  reefs  drag  coefficient  hydrodynamic  characteristics  model  experiment  

As a simplified model of artificial reefs,a series of plate models punched with square or circular openings are designed to investigate the effects of openings on the hydrodynamic characteristics of artificial reefs.The models are grouped by various opening numbers and opening-area ratios.They are physically tested i...

Genetic Parameters of Body Length and Response to Selection for Growth Across Four Generations of Artemia sinica

关键词: artemia  sinica  body  length  heritability  selection  responses  

To investigate the genetic components of growth in the brine shrimp Artemia sinica,we estimated the genetic parameters of body length and the response to selection using a fully pedigreed population of A.sinica.The base population was generated from four wild founder populations.We tested 4160 offspring in 360 famili...

Ion Transport Signal Pathways Mediated by Neurotransmitter(Biogenic Amines)of Litopenaeus vannamei Under Low Salinity Challenge

关键词: ion  regulation  litopenaeus  vannamei  low  salinity  neurotransmitter  ba  receptor  

The Pacific white shrimp,Litopenaeus vannamei,is widely farmed in China.Salinity is a major environmental factor that affects its growth and distribution.Crustacean hyperglycemic hormone is verified to participate in ion transport in response to the salinity challenge mediated by endocrine neurotransmitters(biogenic ...

Identification of Microplankton in South China Sea with Image-Matching Individual PCR

关键词: individual  pcr  microplankton  18s  ribosomal  rna  gene  morphological  identification  molecular  south  china  sea  

In this study,marine microplankton were identified by combining standard light microscopy with Sanger 18S rRNA gene sequencing.The image-matching individual PCR technique was applied to identify the image collectable unicellular microplankton to genera.Instead of pure strain culture and morphological identification,m...

Positive Effects of Isopropanol as a Co-Precipitant in Glycerol-3-Phosphate Acyltransferase Crystallization

关键词: isopropanol  polyethylene  optimization  crystallization  

Glycerol-3-phosphate acyltransferase(GPAT)is considered as the rate-limiting enzyme of glycerolipid synthesis pathway and the core element in lysophosphatidic acid(LPA)synthesis.For understanding its catalytic mechanism,the structural biology study is expected,but is always hindered by obtaining crystals for X-ray di...

High Individual Variability in Beak Stable Isotopes of Jumbo Squid off Peruvian Exclusive Economic Zone(EEZ)Waters in the Analysis of Migratory and Foraging Ecology

关键词: isotopes  variability  trophic  level  beak  dosidicus  gigas  peru  gam  

Stable isotopes(δ^13C andδ^15N)have been widely used to track cephalopod habitat,migration and trophic structure.In this study,we analyzed theδ^13C andδ^15N values in 245 Dosidicus gigas beaks collected during 2009–2010 and in 2013 off Peruvian Exclusive Economic Zone(EEZ)waters.High individual variation in beak sta...

Influence of N,P,Fe Nutrients Availability on Nitrogen Metabolism-Relevant Genes Expression in Skeletonema marinoi

关键词: skeletonema  marinoi  nitrogen  metabolism  relative  gene  expression  

Nitrogen(N),Phosphorus(P),and Iron(Fe)are essential elements for cellular structure and metabolism.In addition to dissolved inorganic nitrogen(DIN),phytoplankton is able to utilize dissolved organic nitrogen(DON).There is general consensus that both bacteria and higher plants nitrogen metabolism is affected by phosph...

The Inhibitory Effects of PSS-Loaded Nanoparticles on the Dysfunction of Cardiac Microvascular Endothelia in Rats with Diabetic Cardiomyopathy

关键词: nanoparticles  marine  drug  dcm  microvascular  endothelial  dysfunction  

Propylene glycol alginate sodium sulfate-loaded nanoparticles(PSS-NP)has been shown potential to prevent the microvascular endothelial injuries caused by diabetic cardiomyopathy(DCM).In this study,we aimed to investigate the effects of PSS-NP on the dysfunction of cardiac microvascular endothelia in streptozotocin(ST...

Information for Authors

关键词: information  authors  

The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The f...