Calcium Isotopes

Isotopes

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Isotopes of calcium

Oxygen isotope ratio cycle

Alkaline earth metal

Calcium-48

Stable isotope ratio

Isotope dilution

Surface exposure dating

Isotope

Silicon isotope biogeochemistry

Reference materials for stable isotope analysis

Calcium

Klaus Blaum

Calcium carbonate

Baryonyx

Spinosauridae

Julie Ezold

Irritator

2018 in non-avian dinosaur paleontology

Megalodon

Ariel Anbar

Calcium cycle

Richard Eastell

Eagle Station group

Permian-Triassic extinction event

Isotopes of strontium

Moeraki Boulders

Isotopes of argon

Isotopes of samarium

Mushroom cloud

Nama Group

Neodymium

Meteoritics

Calcite

Extended periodic table

Δ18O

Prostate cancer

Uranium nitrides

Mycorrhizal network

Danian

History of the periodic table

Craniopharyngioma

Prussian blue

Ice core

Origin and occurrence of fluorine

Zinc in biology

Granite

Olfactory receptor

CA-38

Mass-independent fractionation

Qarhan Playa

Christopher Busby

Valley of stability

Cathedral Peak Granodiorite

Harmon Craig

Ligand binding assay

Donald J. DePaolo

Plankton

Thulium

Scaly-foot gastropod

Carbon isotopes1

• All sediment data have been thoroughly quality controlled, focusing on epibenthic foraminiferal species (such as Cibicidoides wuellerstorfi or Planulina ariminensis) to improve the comparability of model and sediment core carbon isotopes. (pangaea.de)

Ratios8

• But 15 years ago, corresponding author Joseph Skulan, now an adjunct professor at ASU, combined all the factors into a mathematical model that predicted that calcium isotope ratios in blood and urine should be extremely sensitive to bone mineral balance. (spaceref.com)
• But if a disease throws the balance off then you ought to see a shift in the calcium isotope ratios. (spaceref.com)
• This study examined the percentage and stable isotope ratios of fatty acids in milk to study seasonal, year, and regional variability. (mdpi.com)
• While sedimentary gypsum displays sulphur, oxygen and strontium isotope ratios close to contemporaneous (Badenian) seawater, diagenetic anhydrite values are largely elevated. (gov.pl)
• By measuring strontium isotope ratios in bony tissues known as ear stones, scientists can now pinpoint exactly which stream the salmon lived in and tell much about the timing of migrations in the life of the ocean-going fish. (newscientist.com)
• Our method is very robust, because strontium isotope ratios are governed by the underlying geology of the region, which changes little over time," says Kennedy. (newscientist.com)
• The researchers are currently building up a database of strontium isotope ratios for streams on the US east coast. (newscientist.com)
• By assessing ratios of calcium, barium and strontium as well as the number of strontium isotopes, the team was able to deduce both diet and the size of the area that these individuals ranged over. (scientificamerican.com)

Radioactive isotope4

• The radioactive isotope was discovered leaking almost a year ago at the Indian Point nuclear plants, and tests on 12 fish show four with detectible amounts, according to a memo obtained by The Journal News. (ipsecinfo.org)
• A radioactive isotope of strontium has been detected in American milk for the first time since Japan's nuclear disaster-in a sample from Hilo, Hawaii-the Environmental Protection Agency revealed yesterday. (forbes.com)
• EPA considers Sr-90, meanwhile, "the most important radioactive isotope in the environment" because of its health impacts and a longer half-life of 29 years. (forbes.com)
• Consequently, top carnivores can accumulate very high concentrations of this radioactive isotope, even if only very low concentrations are released to the environment. (riverkeeper.org)

Atoms6

• Isotopes are atoms of an element that differ in their masses. (spaceref.com)
• Number of isotopes (atoms of the same element with a different number of neutrons): 20 isotopes whose half-lives are known with mass numbers 237 to 256. (livescience.com)
• It needed 5 billion billion (5 x 10 18 ) atoms of calcium to be fired at the target to produce a single atom of flerovium, in an experiment lasting 40 days. (rsc.org)
• As the handful of atoms began to decay - a process that takes less than a tenth of a second - the team saw six previously undiscovered isotopes of other heavy elements, the researchers report in an upcoming issue of Physical Review Letters . (sciencenews.org)
• Stable calcium atoms that have the same atomic number as the element calcium, but differ in atomic weight. (nih.gov)
• The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope oganesson-294 have been detected. (elementpillows.com)

Stable calcium isotopes2

• It is titled "Rapidly assessing changes in bone mineral balance using natural stable calcium isotopes. (spaceref.com)
• Ca-42-44, 46, and 48 are stable calcium isotopes. (nih.gov)

Carbonate8

• Our study demonstrates that coupled models of the carbon and calcium cycles have the potential to help distinguish contributions of primary seawater isotopic changes from local or diagenetic effects on the δ44/40Ca of carbonate sediments. (news-oceanacidification-icc.org)
• Ear stones, or otoliths, are small lumps of calcium carbonate that are progressively laid down in layers, like tree rings. (newscientist.com)
• Analysis of calcium carbonate samples by Finnigan MAT253 mass spectrometer systems. (whoi.edu)
• Crystallization processes (nucleation and growth) have a role in the "kinetic" incorporation of isotopes and trace elements in calcium carbonate crystals. (conftool.com)
• Late Quaternary deep water circulation in the South Atlantic: Reconstruction from carbonate dissolution and benthic stable isotopes. (pangaea.de)
• Heavy isotope dating techniques, particularly uranium-lead method, are well suited for carbonate minerals studies. (cerege.fr)
• U-Th dating, a very precise dating technique based on the radioactive decay of Uranium isotopes into Thorium, determines the age of calcium carbonate formations up to an age of 500,000 years. (mpg.de)
• Carbonate is naturally occurring in seawater, and it is a crucial building block for organisms that build calcium carbonate hard parts, like clams, oysters, lobsters, corals, and even the tiny plankton that serve as the base of the ocean's food chain. (timescavengers.blog)

Neutrons5

• The isotope Cf-252 is a very strong neutron emitter, meaning it has the unusual property of giving off neutrons when it breaks apart. (livescience.com)
• This isotope has a variety of uses, including acting as a neutron emitter, providing neutrons for the start-up of nuclear reactors. (livescience.com)
• Nuclear theory suggests that isotope 298, with 184 neutrons, should be much more stable but that has yet to be made. (rsc.org)
• The researchers achieved the first observation of alpha decay-a process in which a nucleus releases two protons and two neutrons-for a specific isotope of dubnium (element 105). (aps.org)
• Each isotope of an element differs in the number of neutrons in its nucleus, a variable that can affect radioactivity and other properties. (sciencenews.org)

Known isotopes1

• There are four known isotopes of flerovium with mass numbers 286-289. (rsc.org)

Uranium3

• It has excellent separation efficiency, sensitivity and linearity, and it is used for the analysis of isotopes of strontium, lead, thorium and uranium. (cerege.fr)
• Fluorine gas is primarily used to make certain chemical compounds, the most important of which is uranium hexafluoride, used in separating isotopes of uranium for use in nuclear reactors and nuclear weapons. (cdc.gov)
• The radioactivity of this material is mainly due to the presence of naturally occurring Uranium and Thorium and the daughter isotopes of these elements present in phosphogypsum. (differencebetween.com)

Oxygen5

• Sulphur, oxygen and strontium isotope compositions have been measured in sulphate (gypsum and anhydrite) samples from the Badenian evaporite complex in the Carpathian Foredeep Basin (Poland) to determine the origin of brines from which these sulphates were formed. (gov.pl)
• We measured the stable water isotope composition of oxygen (δ 18 O) and hydrogen (δ 2 H) with a mass spectrometer. (copernicus.org)
• 2009) Oxygen- and magnesium-isotope compositions of calcium-aluminum-rich inclusions from CR2 carbonaceous chondrites. (usra.edu)
• The first measurements of a heavy oxygen isotope in Earth's upper atmosphere suggest that isotopic concentrations could become powerful probes of atmospheric processes at otherwise hard-to-probe altitudes. (aps.org)
• Interdecadal-decadal climate variability from multicoral oxygen isotope records in the South Pacific Convergence Zone region since 1650 A.D. (columbia.edu)

Composition4

• This research has measured the bioavailable strontium isotope composition of soil and rock samples from the major geological units in Israel. (copernicus.org)
• The boron isotope composition in the skeleton of massive Porites corals from the central Great Barrier Reef is used to reconstruct the seawater pH over the 1940-2009 period. (copernicus.org)
• The isotope composition of XeSIN scalable trading strategies not important because XeQ is by far the major Xe component. (qrforex.com)
• Plant litter composition and stable isotope signatures vary during decomposition in blue carbon ecosystems. (bluecarbonlab.org)

Fractionation1

• That difference, called "isotope fractionation," is the key. (spaceref.com)

Naturally2

• With the new technique, bone loss is detected by carefully analyzing the isotopes of the chemical element calcium that are naturally present in urine. (spaceref.com)
• The key difference between gypsum and phosphogypsum is that gypsum is a naturally occurring form of calcium sulfate , whereas phosphogypsum is a synthetic form of calcium sulfate . (differencebetween.com)

Superheavy3

• The experiments dealt with topics from a wide range of scientific disciplines, from medicine and materials research to the properties of superheavy elements and the complex structure of short-lived isotopes that play a role in element synthesis in the universe. (gsi.de)
• The experiment at the SHE Factory, however, benefited from a more sophisticated data analysis and from an optimized separator-a device that isolates generated superheavy nuclei from the calcium beam and from the other reaction products. (aps.org)
• Some of the isotopes are living longer, or have a longer half-life, than previously observed superheavy elements. (sciencenews.org)

Barium1

• Must wait 7 days after any Radiology procedure if performed with Iodine, Barium, Nuclear Medicine Isotopes. (rwjbh.org)

Bone7

• When bones form, the lighter isotopes of calcium enter bone a little faster than the heavier isotopes. (spaceref.com)
• Bone favors lighter calcium isotopes and picks them over the heavier ones. (spaceref.com)
• Taking calcium internally can promote bone growth. (conservapedia.com)
• Health officials warned at the time that it competed with calcium in human bodies, especially in growing children, and could affect bone development. (ipsecinfo.org)
• Furthermore, radium associates with calcium in living systems and accumulates in bone. (cdc.gov)
• Both are "bone-seekers," chemically similar to calcium, that collect in bone and marrow, where they are known to cause cancer. (forbes.com)
• It reduces blood pressure, stress, kidney stone formation, bone calcium loss as well as improves blood sugar levels, heart health, and nerve synapses. (natureprovides.com)

Ions3

• Researchers have achieved long-distance entanglement between two calcium ions, each of which lies in a different building, showing that trapped ions could be used to create quantum networks. (aps.org)
• The team fired a beam of calcium ions at a target containing the radioactive metal americium, creating isotopes of moscovium (element 115) among the collision products. (aps.org)
• The nuclear chemists created a sample of element 114 by bombarding a plutonium target with a beam of calcium ions. (sciencenews.org)

Geochemistry1

• Zhang Yilin competed with her FYP project " Sea surface temperature and sea surface salinity calibration using Porites coral geochemical proxies from Dongsha Atoll in the South China Sea ", supervised by Assoc Prof Wang Xianfeng in the Isotope Geochemistry Lab . (ntu.edu.sg)

Inclusions3

• Theyfocused on lumps within this meteorite known as calcium-aluminum-rich inclusions. (space.com)
• The scientists focused on a wide range of isotopes within the inclusions. (space.com)
• Brennecka and his colleagues discovered these inclusions all had similar concentrations of isotopes. (space.com)

40Ca2

• We present a high-resolution calcium isotope (δ44/40Ca) record from 100 m of marine limestone spanning the Triassic/Jurassic boundary in two stratigraphic sections from northern Italy. (news-oceanacidification-icc.org)
• Coupled numerical models of the geological carbon and calcium cycles demonstrate that this δ44/40Ca excursion is too large to be explained by changes to seawater δ44/40Ca alone, regardless of CO2 injection volume and duration. (news-oceanacidification-icc.org)

Tracer2

• 4 procedure may be made by adding a tracer consisting of an isotope of radium not expected in the sample and noting its recovery at the end of the analytical procedure. (cdc.gov)
• Die HydroTraP Gruppe verwendet verschiedene im flüssigen Wasser sowie im Eis enthaltene Spurenelemente, Verbindungen und Isotope (Tracer) für die Altersdatierung, um Chronologien von Archiven sowie Erkenntnisse über die Dynamik von Oberflächen- und Grundwässern ebenso wie von Gletschern zu gewinnen. (uni-heidelberg.de)

Sulphur1

• Stable isotopes : natural and anthropogenic sulphur in the environment / edited by H. R. Krouse and V. A. Grinenko. (who.int)

Plutonium2

• The two main colours represent the creation of the element from calcium and plutonium. (rsc.org)
• Despite several attempts to make element 114, it was only in 1998 that a team led by Yuri Oganessian and Vladimir Utyonkov at the Joint Institute for Nuclear Research (JINR) in Russia produced it by bombarding plutonium with calcium. (rsc.org)

Nuclei1

• Isotopes with mass numbers around 200 near the magic neutron number N=126 play a crucial role in the synthesis of even heavier nuclei. (gsi.de)

Measurements3

• Noble gas abundance and isotope ratio measurements for seawater and fresh waters, rocks, and other materials. (whoi.edu)
• Trace metal and isotope ratio measurements. (whoi.edu)
• Our research calls for high precision measurements of relative or absolute abundances of isotopes present in the environment, in trace (μg/g) or ultra-trace concentrations (ng/g or less). (cerege.fr)

Sodium4

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• Researchers have discovered the heaviest-known bound isotope of sodium and characterized other neutron-rich isotopes, offering important benchmarks for refining nuclear models. (aps.org)
• Examples of fluorides include sodium fluoride and calcium fluoride. (cdc.gov)
• Sodium fluoride readily dissolves in water, but calcium fluoride does not. (cdc.gov)

Behave2

• Isotopes that behave in this way are very unusual, according to Chemistry Explained . (livescience.com)
• The isotopes don't behave quite as expected - some decay more readily, some less willingly, than the leading theoretical model predicts. (sciencenews.org)

Cadmium1

• Cadmium/calcium and carbon isotope reconstructions of the glacial northeast Atlantic Ocean. (pangaea.de)

Cesium2

• Tests for strontium are triggered by the presence of cesium isotopes, which have been found in milk from Hilo, Montepelier VT, and Oakland and in precipitation from Boise, Richmond CA, Salt Lake City and a few other cities . (forbes.com)
• Strontium-90 (Sr-90) is the latest of several radioactive isotopes, including tritium, cobalt, and cesium, to be discovered in groundwater wells or soil samples since a leak from the Indian Point 2 spent fuel pool was discovered in August 2005. (riverkeeper.org)

Trace elements1

• Measuring the abundances of diverse trace elements and stable and radiogenic isotopes at micron scales. (whoi.edu)

Atomic1

• Thulium can be isolated byreduction of the oxide with lanthanum metal or by calcium reduction of a closed container.The element is silver-gray, soft, malleable, and ductile, and can be cut with a knife.Twenty five isotopes are known, with atomic masses ranging from 152 to 176. (physlink.com)

Element7

• The new technique makes use of a fact well known to Earth scientists, but seldom used in biomedicine: Different isotopes of a chemical element can react at slightly different rates. (spaceref.com)
• Calcium is a very important element to human physiology , as calcium- phosphate salts form the basis for the creation of bones . (conservapedia.com)
• Calcium in its pure form is referred to as "the white element" and must be kept isolated from air. (conservapedia.com)
• Isotope works on a container element with a group of similar child items. (metafizzy.co)
• They also identified a previously unseen isotope of lawrencium (element 103), a product of the dubnium decay. (aps.org)
• Researchers at Lawrence Berkeley National Laboratory in California saw the isotopes of rutherfordium, seaborgium, hassium, darmstadtium, and copernicium by watching the decay of the yet-to-be-named element 114, a synthetic element first produced about a decade ago. (sciencenews.org)
• One isotope of element 114 lasts 2.7 seconds before decaying - an "eternity," says Heino Nitsche, a nuclear chemist at Lawrence Berkeley. (sciencenews.org)

Ratio1

• To tie the fish to a location, the researchers analysed the strontium isotope ratio for each stream on the east coast of the US. (newscientist.com)

Grams1

• Redcon1 Isotope is an ultra-pure, ultra-premium whey isolate protein that gives you 25 grams of the best protein you can buy! (illpumpyouup.com)

Abundance1

• Where more than one isotope exists, the value given is the abundance weighted average. (rsc.org)

Compounds2

• The determination of radium compounds or specific isotopes is usually accomplished by a separation procedure, followed by quantitative analysis of total radium based on its radioactivity. (cdc.gov)
• Both these compounds contain calcium sulfate in the dihydrated form. (differencebetween.com)

Deposits1

• Consuming too much calcium can lead to kidney stones , which are typically composed of calcium deposits. (conservapedia.com)

Mineral1

• Gypsum is a mineral containing calcium sulfate, and it has the molecular formula CaSO 4 ·2H 2 O. It is one of the most common sulfate minerals. (differencebetween.com)

Elements3

• Calcium is one of the primary elements in bones, shells, etc. (conservapedia.com)
• Another field of research that benefits from the increased intensities of the GSI accelerators is the study of isotopes that play a role in the synthesis of elements in the universe. (gsi.de)
• The isotope Cf-252 is a target material for producing transcalifornium elements. (livescience.com)

Abstract1

• abstract = "OBJECTIVES: Coronary artery calcium (CAC) scores derived from computed tomography (CT) scans are used for cardiovascular risk stratification. (edu.au)

Bones1

• That's similar to what happens with calcium isotopes when bones form. (spaceref.com)

Nuclear reaction1

• Each nuclear reaction created Cf-245 - an isotope with a half-life of about 45 minutes - and a free neutron. (livescience.com)

Laboratory1

• The predicted effect on calcium isotopes is very small, but can be measured using sensitive mass spectrometry methods developed by Morgan as part of her doctoral work with Anbar, Skulan and co-author Gwyneth Gordon, an associate research scientist in the W.M. Keck Foundation Laboratory for Environmental Biogeochemistry at ASU. (spaceref.com)

Gypsum1

• Therefore, both gypsum and phosphogypsum are forms of calcium sulfate. (differencebetween.com)

Neuroendocrine1

• This imaging technique uses a novel isotope, ( 18 F-DOPA), for which neuroendocrine cells have a high affinity, in conjunction with coregistered abdominal CT (see the image below). (medscape.com)

Zinc1

• DTPA comes in two forms: calcium (Ca-DTPA) and zinc (Zn-DTPA). (cdc.gov)

Absorption2

• Animal studies have indicated that calcium absorption is increased by lactulose, a synthetic disaccharide. (tno.nl)
• Therefore, the influence of lactulose on calcium absorption was measured in postmenopausal women who may benefit from the possible enhancing effect of lactulose on calcium absorption. (tno.nl)