نتایج جستجو برای: marine sedimentation

تعداد نتایج: 110234  

2010
C.RAJTHILAK P.PERUMAL A. MURUGAN

Marine birnavirus (MBVs) infect a wide range of fish and shellfish. Yet their mode of transmission is still unclear. To determine marine plankton serve as a vector for MABVs. The marine birnavirus (MABVs) is a member of Aquabirnavirus and an opportunistic pathogenic form among eukaryotic marine organisms and determine the viral presence in zooplankton as a vector, molecular diagnosis can be use...

Journal: :PeerJ 2021

Crinoids are largely considered as good indicators for determining environmental conditions. They robust proxies inferring changes in salinity and sedimentation rate substrate type. Some crinoid groups ( e.g ., certain comatulids, cyrtocrinids, millericrinids) have a depth preference, thus, making them useful palaeodepth estimation. The hypotheses that distribution is substrate-dependent (rock ...

2008
Girolamo Fiorentino Donatella Magri K. J. Willis K. D. Bennett S. G. Haberle

It has been suggested that climates during the Holocene have varied on timescales of about 1500 years, forced by oscillations of a solar cycle. These climatic changes have been implicated as the cause of changes in geological records from, mostly, marine sediments. If there were such changes, and if they were of great enough amplitude to force changes in marine sedimentation, it would be reason...

2014
Guowei Sun Jinzhou Xiao Hongming Wang Chaowen Gong Yingjie Pan Shuling Yan Yongjie Wang

Marine viruses are the most abundant entities in the ocean and play crucial roles in the marine ecological system. However, understanding of viral diversity on large scale depends on efficient and reliable viral purification and concentration techniques. Here, we report on developing an efficient method to purify and concentrate viruses from large body of high turbidity seawater. The developed ...

2003
M. Zabel T. Wagner P. deMenocal

The inorganic terrigenous fraction of marine sediments offers a great number of different and well established proxy parameters to investigate the development of Earth's climate. Our present knowledge on climate variability through time is based, to a large part, on these proxies. This study presents a synthesis of multidisciplinary investigations which have been applied to late Quaternary sedi...

2012
Mikal Heldal Svein Norland Egil S. Erichsen T. Frede Thingstad Gunnar Bratbak

Biogenic production and sedimentation of calcium carbonate in the ocean, referred to as the carbonate pump, has profound implications for the ocean carbon cycle, and relate both to global climate, ocean acidification and the geological past. In marine pelagic environments coccolithophores, foraminifera and pteropods have been considered the main calcifying organisms. Here, we document the prese...

ژورنال: علوم آب و خاک 2001
امیری, رضا , رضایی, عبدالمجید ,

In order to evaluate the relationship between SDS-sedimentation value and breadmaking quality of wheat (Triticum aestivum L.), glutenin subunits of different genotypes (foreign and Iranian cultivars) were analyzed by reverse-phase high performance liquid chromatography (RP-HPLC). SDS-sedimentation value was used as an indirect criterion for breadmaking quality. Correlation coefficients revealed...

In the present research, the aqueous suspensions of nano-sized YSZ particles were prepared using a common and available dispersant (Dolapix CE64) at different pH values and their stability were evaluated through the sedimentation height, viscosity measurement, and microstructural observation. Different amounts of dispersant were tested and the optimum percentage was examined by measuring the vi...

2017
A. Montelli J.A. Dowdeswell D. Ottesen S.E. Johansen

Reconstructing the evolution of ice sheets is critical to our understanding of the global environmental system, but most detailed palaeo-glaciological reconstructions have hitherto focused on the very recent history of ice sheets. Here, we present a three-dimensional (3D) reconstruction of the changing nature of ice-sheet derived sedimentary architecture through the Quaternary Ice Age of almost...

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