Results 41 to 50 of about 77,164 (309)

Seasonally resolved growth of freshwater bivalves determined by oxygen and carbon isotope shell chemistry [PDF]

, 2010
By means of a monitoring experiment in two rivers in the Netherlands, we establish a relationship between seasonally resolved growth rates in unionid freshwater bivalves and their environment.
Dick Kroon, Kroon, Dick, Versteegh, E.A.A., Troelstra, S R, Ron J. G. Kaandorp, Vonhof, H B, Versteegh, Emma A. A., Simon R. Troelstra, Troelstra, Simon R., Kaandorp, R J G, Hubert B. Vonhof, Troelstra, S.R., Kroon, D., Vonhof, Hubert B., Vonhof, H.B., Kaandorp, Ron J. G., Kaandorp, R.J.G., Emma A. A. Versteegh, Kroon, D   +18 more
core   +1 more source

Environmental controls on the stable isotopic composition of Mercenaria mercenaria: Potential application to paleoenvironmental studies [PDF]

, 2003
We have investigated the environmental controls of seasonally resolved records of oxygen and carbon isotopes of modern Mercenaria mercenaria bivalves collected live from five coastal sites along the east coast of North America.
Linsley, B. K., Howe, S. S., Elliot, M., deMenocal, P. B.   +3 more
core   +1 more source

A comparative study of production methods for nuclear-grade boron carbide powder

EPJ Nuclear Sciences & Technologies
Two industrial-scale methods for synthesizing nuclear-grade boron carbide (B4C) powder have been investigated and compared: direct synthesis from elements and carbothermal reduction.
Mestvirishvili Zviadi, Jalabadze Nikoloz, Nadaraia Lili   +2 more
doaj   +1 more source

A stable isotope method using a [2H5]glycerol bolus to measure very low density lipoprotein triglyceride kinetics in humans

Journal of Lipid Research, 1999
We have developed a method using a bolus of [2H5]glycerol to determine parameters of VLDL-triglyceride (VLDL-TG) turnover and have compared the data to that obtained using simultaneously a bolus of [2-3H]glycerol in six young normolipidemic men.
Simone Lemieux, Bruce W. Patterson, André Carpentier, Gary F. Lewis, George Steiner   +4 more
doaj   +1 more source

The Preparation of Carbon and Nitrogen Stable Isotopes Reference Materials Using Sediments from the Bohai and East China Seas

Yankuang ceshi, 2017
The stable isotope of carbon and nitrogen (δ13C and δ15N) in marine sediments have received much attention as they can be used to trace the sources of organic matter and are helpful in understanding the carbon cycle, climate change and the transformation
QIN De-di, HE Xing-liang, ZHANG Yuan-yuan, LI Feng, CHEN Yu-feng, ZHANG Pei-yu   +5 more
doaj   +1 more source

Centrifugal Separation of Titanium Isotopes Using Titanium Tetrachloride as Processing Gas

Journal of Isotopes, 2020
Stable isotope techniques have been widely used in modern agriculture, ecological environment, medical diagnosis, nuclear industry, fundamental physics research, and so on. Natural titanium has 5 stable isotopes.
PEI Gen;PAN Jianxiong;ZHOU Mingsheng;JIAN Conghui
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Comparison of different methods to determine the degree of peat decomposition in peat bogs [PDF]

Biogeosciences, 2014
Peat humification or decomposition is a frequently used proxy to extract past time changes in hydrology and climate from peat bogs. During the past century several methods to determine changes in peat decomposition have been introduced.
H. Biester, K.-H. Knorr, J. Schellekens, A. Basler, Y.-M. Hermanns   +4 more
doaj   +1 more source

Determining trophic niche width: a novel approach using stable isotope analysis [PDF]

, 2004
1. Although conceptually robust, it has proven difficult to find practical measures of niche width that are simple to obtain, yet provide an adequate descriptor of the ecological position of the population examined. 2.
Bearhop, S., Bearhop, Stuart, Fuller, R.A., Waldron, S., Adams, C.E., Macleod, H.   +5 more
core   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source