An element of the rare earth family of metals. It has the atomic symbol Ce, atomic number 58, and atomic weight 140.12. Cerium is a malleable metal used in industrial applications.
Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. Ce-136, 138, and 142 are stable cerium isotopes.
Unstable isotopes of cerium that decay or disintegrate emitting radiation. Ce atoms with atomic weights 132-135, 137, 139, and 141-148 are radioactive cerium isotopes.
Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)
Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms.
Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.
A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust.
Books used in the study of a subject that contain a systematic presentation of the principles and vocabulary of a subject.
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.
Methods for assessing flow through a system by injection of a known quantity of an indicator, such as a dye, radionuclide, or chilled liquid, into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
Method for assessing flow through a system by injection of a known quantity of radionuclide into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
A basis of value established for the measure of quantity, weight, extent or quality, e.g. weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
A family of freshwater fish comprising the minnows or CARPS.
One of a set of bone-like structures in the mouth used for biting and chewing.
Common name for a number of different species of fish in the family Cyprinidae. This includes, among others, the common carp, crucian carp, grass carp, and silver carp.
A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.
Paired respiratory organs of fishes and some amphibians that are analogous to lungs. They are richly supplied with blood vessels by which oxygen and carbon dioxide are exchanged directly with the environment.
Community of tiny aquatic PLANTS and ANIMALS, and photosynthetic BACTERIA, that are either free-floating or suspended in the water, with little or no power of locomotion. They are divided into PHYTOPLANKTON and ZOOPLANKTON.
Acridine antineoplastic agent used in mammary and ovarian tumors. It inhibits RNA synthesis.
Crk-associated substrate was originally identified as a highly phosphorylated 130 kDa protein that associates with ONCOGENE PROTEIN CRK and ONCOGENE PROTEIN SRC. It is a signal transducing adaptor protein that undergoes tyrosine PHOSPHORYLATION in signaling pathways that regulate CELL MIGRATION and CELL PROLIFERATION.
Prospective patient listings for appointments or treatments.
Protein components of the CRISPR-CAS SYSTEMS for anti-viral defense in ARCHAEA and BACTERIA. These are proteins that carry out a variety of functions during the creation and expansion of the CRISPR ARRAYS, the capture of new CRISPR SPACERS, biogenesis of SMALL INTERFERING RNA (CRISPR or crRNAs), and the targeting and silencing of invading viruses and plasmids. They include DNA HELICASES; RNA-BINDING PROTEINS; ENDONUCLEASES; and RNA and DNA POLYMERASES.
A nucleocytoplasmic transport protein that binds to ALPHA KARYOPHERINS and RAN GTP BINDING PROTEIN inside the CELL NUCLEUS and participates in their export into CYTOPLASM. It is also associated with the regulation of APOPTOSIS and microtubule assembly.
A negative regulator of the CELL CYCLE that undergoes PHOSPHORYLATION by CYCLIN-DEPENDENT KINASES. RBL2 contains a conserved pocket region that binds E2F4 TRANSCRIPTION FACTOR and E2F5 TRANSCRIPTION FACTOR. RBL2 also interacts with viral ONCOPROTEINS such as POLYOMAVIRUS TUMOR ANTIGENS; ADENOVIRUS E1A PROTEINS; and PAPILLOMAVIRUS E7 PROTEINS.
Extensive collections, reputedly complete, of facts and data garnered from material of a specialized subject area and made available for analysis and application. The collection can be automated by various contemporary methods for retrieval. The concept should be differentiated from DATABASES, BIBLIOGRAPHIC which is restricted to collections of bibliographic references.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
The science of breeding, feeding and care of domestic animals; includes housing and nutrition.
The act or ceremony of putting a corpse into the ground or a vault, or into the sea; or the inurnment of CREMAINS.
The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed)
The faculty of expressing the amusing, clever, or comical or the keen perception and cleverly apt expression of connections between ideas that awaken amusement and pleasure. (From Random House Unabridged Dictionary, 2d ed)
Neuralgic syndromes which feature chronic or recurrent FACIAL PAIN as the primary manifestation of disease. Disorders of the trigeminal and facial nerves are frequently associated with these conditions.
Exclusive legal rights or privileges applied to inventions, plants, etc.
A plant genus of the family Orobanchaceae that is parasitic on the roots of other plants. Members contain the flavones, APIGENIN and LUTEOLIN.
Disruption of structural continuity of the body as a result of the discharge of firearms.
Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Head injuries which feature compromise of the skull and dura mater. These may result from gunshot wounds (WOUNDS, GUNSHOT), stab wounds (WOUNDS, STAB), and other forms of trauma.
The practice of medicine as applied to special circumstances associated with military operations.
High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.
Unstable isotopes of strontium that decay or disintegrate spontaneously emitting radiation. Sr 80-83, 85, and 89-95 are radioactive strontium isotopes.
Stable strontium atoms that have the same atomic number as the element strontium, but differ in the atomic weight. Sr-84, 86, 87, and 88 are the stable strontium isotopes.
The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).
The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.
A subclass of cannabinoid receptor found primarily on central and peripheral NEURONS where it may play a role modulating NEUROTRANSMITTER release.

Uterine prostaglandin E secretion and uterine blood flow in the pregnant rabbit. (1/8)

Studies were performed in pregnant rabbits to assess the effect of inhibition of prostaglandin synthesis on uterine blood flow. Cardiac output and uteroplacental blood flow (UPBF) were measured using radiolabeled microspheres. Prostaglandin E (PGE) concentration was measured by radioimmunoassay in the uterine vein and peripheral artery of the pregnant nephrectomized rabbit. Either meclofenamate or indomethacin 2 mg/kg were utilized to inhibit prostaglandin synthesis. Systemic arterial pressure increased from 86 mm Hg to 98 mm Hg (P less than0.0001) after prostaglandin inhibition. Cardiac output was unchanged after the inhibition of prostaglandin synthesis, 326 ml/min to 7.8 ml/min. Uterine vein PGE concentration was extremely high, 172.4 ng/ml, with concomitant peripheral arterial PGE 2.1 NG/ML. Intravenous administration of either meclofenamate or indomethacin reduced uterine vein PGE to 23 ng/ml (P less than 0.01) and arterial PGE to 1.0 ng/ml (P less than 0.05). Male and nonpregnant female rabbits had lower arterial PGE, 0.37 ng/ml (P less 0.05). Studies in non-nephrectomized pregnant animals demonstrated that uteroplacental secretion of PGE was greater than five times renal secretion. These studies demonstrate that the rabbit uteroplacental unit is a rich source of PGE and suggest that production of the vasoactive lipid may have a key role in regulating UPBF during pregnancy.  (+info)

Myocardial blood flow distribution during ischemia-induced coronary vasodilation in the unanesthetized dog. (2/8)

This study was designed to determine whether coronary vasodilation distal to a flow-limiting coronary artery stenosis could result in redistribution of myocardial blood flow to produce subendocardial underperfusion. Studies were performed in 10 awake dogs chronically prepared with electromagnetic flow-meters and hydraulic occluders on the left circumflex coronary artery. Regional myocardial blood flow was measured using radionuclide-labeled microspheres, 7-10 mum in diameter, injected into the left atrium. A 5(-s) coronary artery occlusion was followed by reactive hyperemia with excess inflow of arterial blood effecting 375+/-20% repayment of the blood flow debt incurred during occlusion. When, after a 5(-s) occlusion, the occluder was only partially released to hold arterial inflow to the preocclusion level for 20 s before complete release, the delayed reactive hyperemia was augmented (mean blood flow repayment = 610+/-45%, P < 0.01). This augmentation of the reactive hyperemia suggested that ischemia was continuing during the interval of coronary vasodilation when coronary inflow was at the preocclusion level. Measurements of regional myocardial blood flow demonstrated that endocardial flow slightly exceeded epicardial flow during control conditions. When arterial inflow was limited to the preocclusion rate during vasodilation after a 5(-s) total coronary artery occlusion, however, flow to the subepicardial myocardium was increased at the expense of underperfusion of the subendocardial myocardium. Thus, in the presence of a flow-limiting proximal coronary artery stenosis, ischemia-induced coronary vasodilation resulted in redistribution of myocardial blood flow with production of subendocardial ischemia in the presence of a net volume of arterial inflow which, if properly distributed, would have been adequate to prevent myocardial ischemia.  (+info)

Uterine blood flow and uterine renin secretion. (3/8)

Experiments were carried out in pregnant nephrectomized rabbits to determine the relationship between uterine blood flow and uterine renin secretion. Uterine blood flow was measured by the percentage distribution of radioactive microspheres injected into the left ventricle which lodged in uterus and placenta, and cardiac output was measured by dye dilution. In 40 animals, 24 hr after nephrectomy, uterine blood flow was 4.7+/-0.4% of cardiac output and absolute flow 32.4+/-3 ml/100 g per min. Plasma renin activity (PRA) in uterine vein, 994+/-182 ng/100 ml per hr, was higher than in carotid artery, 832+/-143 (P < 0.025). With reduction of uterine blood flow from 4.7+/-0.5 to 1.95+/-0.3% of cardiac output and absolute flow from 30.8+/-4.6 to 8.8+/-2 ml/100 g per min, uterine vein PRA rose from 1434+/-234 to 4430+/-300 (P < 0.001), and carotid artery PRA from 1009+/-200 to 2300+/-350 (P < 0.01). Hemorrhagic hypotension caused uterine vein PRA to increase from 913+/-293 to 3638+/-1276 (P < 0.001) and carotid artery PRA from 774+/-252 to 1730+/-433 (P < 0.01). Uterine blood flow expressed as a percentage of cardiac output remained constant after hemorrhage, 5.5+/-0.9 and 6.3+/-0.8%, although absolute flow fell from 37+/-7.7 to 29+/-3.6 ml/100 g per min because of the large fall in cardiac output which occurred.Angiotensin, 10 ng/kg per min, caused no significant change in blood pressure or cardiac output but increased uterine blood flow from 4.1+/-0.6 to 8.4+/-1% (P < 0.005) of cardiac output with absolute flow increasing from 37.4+/-7 to 73.2+/-10 ml/100 g per min (P < 0.001). The increase in uterine blood flow during angiotensin was abolished by the prior administration of propranolol. Isoproterenol, 0.5 mu/min, increased uterine blood flow from 3.5+/-0.6 to 6.4+/-1.2% of cardiac output (P < 0.02) with absolute flow increasing from 25+/-5 to 51+/-12 ml/100 g per min (P < 0.05). Norepinephrine, 500 ng/min, caused no significant change in uterine blood flow. These findings suggest that uterine renin might be involved in regulating uterine blood flow, secretion being increased in response to a reduction in flow with the resultant rise in circulating or local angiotensin, through beta adrenergic stimulation, increasing uterine blood flow.  (+info)

Effects of vasopressin and isoprenaline infusions on the distribution of blod flow in the intestine; criteria for the validity of microsphere studies. (4/8)

1. The distribution of superior mesenteric arterial flow was investigated by radioactive microspheres. The small intestine received 83% of the flow ((85 ml/min)/100 g intestine) and flow was uniform along the length of the small intestine.2. The intestinal wall was separated into 3 layers-muscle, submucosa and mucosa. The muscle received (8 ml/min)/100 g intestine and the combined submucosa and mucosa (77 ml/min)/100 g intestine.3. The distribution of microspheres between the mucosa and submucosa depended on the size of the microspheres; the smaller the spheres, the more were found in the mucosa. It also depended on the state of the vascular bed; if microspheres were given during an infusion of vasopressin, a subsequent infusion of isoprenaline resulted in movement of some of the spheres from the submucosa into the mucosa.4. Histological studies after India ink injection showed few capillary-sized vessels but many large vessels in the submucosa. Capillary-sized vessels arose close to the junction with the mucosa and passed into the mucosa.5. These and other data suggest that the intestine consists of two parallel-coupled sections, one to the muscle and the other through the submucosa to the mucosa. The vessels in the submucosa are in series with those in the mucosa and submucosal shunts do not exist. Redistributions of flow between mucosa and submucosa cannot therefore occur during stimulation of the sympathetic nerves or infusions of drugs such as noradrenaline or adrenaline.6. When microspheres are used in pharmacological investigations on distribution of blood flow in organs, controls to validate the method for the particular areas being studied are essential. If the vessels in the areas studied are in series rather than in parallel, the method is invalid.  (+info)

Mechanism of the redistribution of renal cortical blood flow during hemorrhagic hypotension in the dog. (5/8)

Studies were performed to define the mechanisms involved in the redistribution of renal cortical blood flow to inner cortical nephrons which occurs during hemorrhagic hypotension in the dog. The radioactive microsphere method was utilized to measure regional blood flow in the renal cortex. Renal nerve stimulation decreased renal blood flow 40% but had no effect on the fractional distribution of cortical blood flow. Pretreatment with phenoxybenzamine, phentolamine, propranolol, or atropine did not alter the redistribution of cortical flow during hemorrhage. A reduction in renal perfusion pressure by aortic constriction caused a qualitatively similar alteration in regional blood flow distribution as occurred during hemorrhage. When perfusion pressure was kept constant in one kidney by aortic constriction followed by hemorrhage, no redistribution occurred in the kidney with a constant perfusion pressure while the contralateral kidney with the normal perfusion pressure before hemorrhage had a marked increase in the fractional distribution of cortical flow to inner cortical nephrons. Additionally, retransfusion had no effect on the fractional distribution of flow in the kidney in which perfusion pressure was maintained at the same level as during hemorrhage while in the contralateral kidney in which pressure increased to normal there was a redistribution of flow to outer cortical nephrons. These studies indicate that the redistribution of renal cortical blood flow which occurs during hemorrhage is not related to changes in adrenergic activity but rather to the intrarenal alterations which attend a diminution in perfusion pressure.  (+info)

Postnatal changes in renal glomerular blood flow distribution in puppies. (6/8)

The intrarenal distribution of radionuclide microspheres injected into the thoracic aorta was used to examine glomerular blood flow distribution (GBFD) in 26 healthy, unanesthetized puppies, ranging in age from 5 h to 42 days, and in 5 adult dogs. For analysis, the cortex was divided into four equally thick zones designated zone I (subcapsular) to zone IV (juxtamedullary). During the first 36 h of life, the highest flow rate was in zone II, which received 35.5+/-2.0%/g, compared with 26.8+/-1.4% to zone I, 23.7+/-1.4% to zone III, and 13.4+/-1.4% to zone IV. At age 6 wk, zone I had the highest rate of perfusion (48.6+/-2.1%, compared with 28.8+/-1.4% in zone II, 15.8+/-0.8%, in zone III, and 6.8+/-0.6% in zone IV). The 6-wk old animals resembled the adult animals, except for relatively greater perfusion per gram of zone I in the former group. Changes in relative GBFD did not correlate with those in arterial pressure or peripheral hematocrit. The distribution of glomeruli among the four zones of the cortex followed its own pattern of development. At birth and at 6 wk, the greatest density of glomeruli was in zone I (50.6+/-5.4 and 42.7+/-3.9%/g respectively, as compared with 24.1+/-2.9% in adults); in adults zone II contained the greatest density (39.1+/-1.6%). At birth the relative perfusion of glomeruli in zone I was only one-fifth that of glomeruli in zone IV, with intermediate values in zones II and III. By 6 wk of age, increased perfusion of the outer cortical glomeruli resulted in rates of flow in the four zones that did not differ significantly from each other. Relative perfusion in zone I continued to increase, so that in the adult animals perfusion in that zone was significantly greater than in the three deeper zones. These data demonstrate the marked hemodynamic changes that take place within the kidney during the first few weeks of life. The relatively greater blood flow of the most deeply situated nephrons in the early postnatal period suggests ascendancy of this population of nephrons and may have important functional implications.  (+info)

The Anrep effect reconsidered. (7/8)

Evidence is presented supporting the hypothesis that the positive inotropic effect after an abrupt increase in systolic pressure (Anrep effect) is the recovery from subendocardial ischemia induced by the increase and subsequently corrected by vascular autoregulation of the coronary bed. Major evidence consists of data obtained from an isolated heart preparation showing that the Anrep effect can be abolished with coronary vasodilation, and that with an abrupt increase in systolic pressure there is a significant reduction in the distribution of coronary flow to subendocardial layers of the ventricle. Furthermore, the intracardiac electrocardiogram shows S-T segment and T wave changes after an abrupt increase in ventricular pressure similar to that noted after coronary constriction. Major implications are that normally there may be ischemia of the subendocardial layers tending to reduce myocardial contractility which may account, in part, for the positive inotropic effect of various coronary vasodilators; that with an abrupt increase in ventricular pressure the subendocardium is rendered temporarily ischemic, placing the heart in jeopardy from arrhythmias until this is corrected; and that end-diastolic pressure and the intracardiac electrocardiogram may provide a means of evaluating the adequacy of circulation to subendocardial layers in diseased ventricles when systolic pressure is abruptly increased.  (+info)

Effect of renal vasodilatation on the distribution of cortical blood flow in the kidney of the dog. (8/8)

Studies were performed to evaluate the validity of using the radioactive microsphere technique to measure regional blood flow in the renal cortex. A technique was developed in which the renal cortex was divided into four equal zones, and the fractional and absolute distribution of blood flow in these zones was determined. It was consistently found that approximately 70% of the renal blood flow was distributed to the two outer cortical zones with the remaining 30% going to the two inner cortical zones. In addition, there was a reproducible pattern of distribution of blood flow in different areas of the same kidney after a single injection of microspheres and in the same area of the kidney after multiple injections of microspheres. Using this method, the distribution of renal blood flow was determined before and during the intrarenal administration of either acetylcholine (40 mug/min) or bradykinin (5 mug/min). Both agents decreased the per cent of blood flow to outer cortical zone 1, caused no change in zone 2, and increased the fractional blood flow in inner cortical zones 3 and 4. When this data was evaluated in terms of total blood flow, there was no change in zone 1, an increase in zone 2 commensurate with the change in total blood flow, and a marked increase in inner cortical zones 3 and 4 which accounted for 60 and 65% of the increase in total blood flow during acetylcholine and bradykinin administration, respectively.Therefore, the natriuresis of renal vasodilatation is associated with a redistribution to inner cortical nephrons.  (+info)

A theoretical ionic model of ventricular myocyte used by Bluhm et al. (8) to analyze changes in sarcolemmal ion fluxes following step changes in cardiac muscle length predicted that a sudden increase in muscle length might induce changes in sarcolemmal Na+ influx with a subsequent increase in intracellular Na+ concentration ([Na+]i) and a concomitant increase in systolic Ca2+ entry through the Na+/Ca2+ exchanger (NCX). However, the mechanism by which the increase in [Na+]i takes place was not proposed. Since NHE1 is an important Na+ entry pathway in cardiomyocytes and it is activated by ANG II, ET-1, and Ald, it seems a suitable candidate for the stretch-mediated increase in Na+ influx.. The first evidence suggesting myocardial stretch-mediated NHE1 activation emerged from experiments published in 1998 in which stretching cat papillary muscles maintained in bicarbonate-free medium (condition in which NHE1 is the only active pHi regulatory mechanism) produced an intracellular alkalinization that ...
Cerium Isotopes: Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. Ce-136, 138, and 142 are stable cerium isotopes.
Definition of uterine vein in the Get a Grip America. Meaning of uterine vein with illustrations and photos. Pronunciation of uterine vein and its etymology. Related words - uterine vein synonyms, antonyms, hypernyms and hyponyms. Example sentences containing uterine vein
Artwork page for Boris Anrep in his Studio, 65 Boulevard Arago, Pierre Roy, 1949 on display at Tate Modern. This is a painting of an imagined sculpture head. Here, Roy turns his friend and fellow-artist Boris Anrep, to stone. Roy uses his usual style of manipulation of perspective to create a sense of great scale. The bust appears to tower over the studio. Though the painted sculpture is solemn and restrained, Roys perspective creates an odd effect. The size of the bust creates the feeling of a cinematic zoom, in which an object is suddenly brought into dramatic focus.
Knowledge of the principles of oxygen delivery and consumption is important for understanding shock. Arterial oxygen content is the amount of oxygen bound to hemoglobin plus the amount dissolved in plasma. Oxygen is delivered to the tissues by the pumping function [cardiac output (CO)] of the heart. This is dependent upon the interplay of cardiac inotropy (speed and shortening capacity of myocardium), chronotropy (heart contraction rate), and lusitropy (ability to relax and fill heart chambers). Determinants of inotropy include autonomic input from sympathetic activation, parasympathetic inhibition, circulating catecholamines, and short-lived responses to an increase in afterload (Anrep effect) or heart rate (Bowditch effect).7 Increases in inotropic state help to maintain stroke volume at high heart rates.7 Under certain conditions, such as shock states, higher levels of ...
Blood enters each kidney via renal artery and leaves each kidney via renal vein. -Urine exists the kidney through a duct called the ureter and the uruters of both kidneys drain into a common urinary bladder. -Kidney consists of outer renal cortex and inner renal medulla. -Nephron is functional unit of vertebrate kidney. -Consists of single long tubule and ball of capillaries called the glomerulus. -Bowmans capsule surrounds the glomerulus. -Kidney regulates the composition of the blood and produce urine. -Filtration occurs as blood pressure forces water, urea, salts, and other small solutes from the blood in the glomerulus into the Bowmans capsule. -Nonselective. -Filtrate goes into proximal tube, loop of Henle (a hairpin turn with a descending limb and ascending limb) and the distal tubule. -Kidney consists of cortical nephrons and juxtamedullary nephrons (only in mammals and birds). -Most of filtrate is reabsorbed back into blood; the kidneys take out about 1%. -Proximal and distal tubules ...
In Chinese medical form, Chinese medicine is widely used in the treatment of various kidney diseases. In addition, many natural treatments have been developed based on Chinese medicine. And the therapy of purifying toxins from the blood takes on the best effects, helping patients reduce high levels of creatinine. From many years of clinical experience, if waste products and toxins are eliminated from the body, firstly, patients can often act better than those who do not eliminate waste products, since toxins in the blood not only cause additional damage to kidney and tissue cells , and also affect the effectiveness of drugs for the treatment of the kidneys. Because the toxins deposited in the blood not only cause additional damage to the kidney function, but also affect the effectiveness of treatment of kidney drugs. Therefore, this treatment mainly uses medicinal herbs that help patients to isolate products from waste and toxic substances. When using herbal medicines, various natural products ...
The study will be an open controlled pilot study of 6 patients with early-onset severe preeclampsia. Patients will receive Atenativ in addition to conventional therapy The patients will be followed up within the study until three days after delivery. In addition to conventional therapy, i.v. administration of Atenativ will be given in a dosage aimed to raise the plasma level of AT initially to 120% (1.2 kIU/L) The goal is to achieve and maintain plasma activity of about 100% during two weeks. The dose of Atenativ is based on the actual plasma level of AT measured 2 hours before the dose. During the first two days of treatment plasma samples will be drawn for the measurement of AT activity twice a day, once before and 12 hours after infusion in order to monitor the dosage. Thereafter and until study discontinuation AT will be measured once a day. The treatment will continue for two weeks if plasma AT III is below 100% (1.0 kIU/L).Uterine blood flow is measured before, during and after the AT ...
Alpha Chemika is a leading Manufacturer Exporter & Supplier of Cerium Acetate in Mumbai Maharashtra India, Exporter of Cerium Acetate in Maharashtra, Wholesale Cerium Acetate Supplier in Mumbai, Cerium Acetate Manufacturing Company in India.
A pregnant rabbit gives subtle clues to her pregnancy. Learn these five clues so you will be well prepared for your rabbits impending rabbit litter
ООО ХИМКРАФТ / CHEMCRAFT Ltd.. VAT-ID: 3906361820. Reg. number: 1173926029067. Tel: +7 4012 994 890. email: [email protected] Russia, 236039 Kaliningrad, Bagrationa str. 134/6. ...
Other beneficial effects mediated by RAAS inhibitors in diabetic nephropathy include: ACE inhibitors increase the permeability selectivity of the filtering membrane, thereby diminishing exposure of the mesangium to proteinaceous factors that may stimulate mesangial cell proliferation and matrix production, two processes that contribute to expansion of the mesangium in diabetic nephropathy. Because Ang II is a growth factor, reductions in the intrarenal levels of AngII may further attenuate mesangial cell growth and matrix production.. This is why they are the drugs of choice for hypertensive patients with diabetes and are even being used in patients with diabetic nephropathy but are not hypertensive.. 2. Why they are contraindicated in bilateral renal artery stenosis?. The entry of blood into glomerulus is regulated both by afferent and efferent arteriolar tone . Glomerular circulation is regulated by renal juxta glomerular apparatus.It modulates the glomerular blood flow by secreting renin ...
The magnesium content of many diets falls short; this important mineral may be critical for good blood flow dynamics which support fertility and implantation. - Magnesium And Uterine Blood Flow - Infertility at BellaOnline
Diagnosis Code S35.534 information, including descriptions, synonyms, code edits, diagnostic related groups, ICD-9 conversion and references to the diseases index.
TY - CONF. T1 - Simulating the effect of uterine contractions on uterine blood flow and fetal oxygenation. AU - Jongen, G.J.L.M.. AU - Hout, van der, M.B.. AU - Oei, S.G.. AU - Vosse, van de, F.N.. AU - Bovendeerd, P.H.M.. PY - 2014. Y1 - 2014. M3 - Poster. ER - ...
Alfa Aesar™ Cerium(III) oxalate hydrate, 99% 25g Alfa Aesar™ Cerium(III) oxalate hydrate, 99% Inorganic Cerium Compounds
For the first endothermic step, cerium(IV) oxide is thermally dissociated in an inert gas atmosphere at 2,000 °C (3,630 °F) and 100-200 mbar into cerium(III) oxide and oxygen. In the second exothermic step cerium(III) oxide reacts at 400 °C (752 °F)-600 °C (1,112 °F) in a fixed bed reactor with water and produces hydrogen and cerium(IV) oxide. ...
Diagnosis Code S35.534D information, including descriptions, synonyms, code edits, diagnostic related groups, ICD-9 conversion and references to the diseases index.
Facts about Cerium talk about the chemical element in the periodic table which has the atomic number 58. The symbol of the element is Ce. Cerium is very easy to
Im now 22 weeks pregnant with di/di twin boys. They are closely watching my BP as its been borderline high, but not high enough for meds yet. They did check my uterine blood flow (and the placentas/ insertion) at the 20 week U/S and all looked good. We are now going to be going to the MFM weekly f ...
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Background/Purpose: Fractalkine (FKN, CX3CL1) and its receptor, CX3CR1, play an important role in chemotaxis of immune cells, such as cell adhesion, migration and infiltration into the organs. Several lines of evidence indicated that serum level of FKN was elevated and correlated with disease activity in patients with rheumatoid arthritis (RA) and the expression of CX3CR1 is upregulated especially in peripheral intermediate monocytes, CD14++CD16+in RA patients as compared to healthy controls (HC). On the other hand, it has been reported that elevated expression CX3CR1+macrophages were infiltrated in the kidney of lupus patients and CD16+monocytes within the glomerular blood vessels of the patients corresponds to the high CX3CR1+expressing monocytes. In this study, we investigated the expression level of CX3CR1 in peripheral monocytes and T cells from patients with systemic lupus erythematosus (SLE) and HC to elucidate the possible involvement of CX3CR1 in immunological features of SLE. Methods: ...
Vision Expo East, New York 18th - 20th March Cerium Product USA Inc are proud to be exibiting our wide range of products and services at this years New York Vison Expo East Show, please visit us at our stand LP 1875.. Cerium Optical Products will be attending this years Vision Expo in New york to showcase its range of equipment, products and services for both laboratories and optical retailers, developed at its HQ in Tenterden, KentEngland.. Ceriums range extends from its Alphamatic rimless drill system and extensive lens production consumable range including Shades dyes, now in user-friendly, environment-friendly, space and cost-saving Ecobag presentation: just open the colorful outer and drop the soluble inner bag whole into the dye bath.. Cerium now also offers a Hi-Index Shades dye collection specially formulated to give reliable, high-quality results on substrates up to 1.67 index. Their plastic lens polish choices were recently augmented by their own free-form friendly, all-substrates ...
In nature, cerium occurs together with other lanthanoids in so-called cerite earths , such as in allanite (Ca, Ce, La, Y) 2 (Al, Fe) 3 (SiO 4 ) 3 (OH), in monazite (Ce, La , Th, Nd, Y) PO 4 as well as in the bastnäsite (Ce, La, Y) CO 3 F. Cer is the most common element of the lanthanides and is ranked 28th in the element frequency in the earths crust, down to a depth of 16 km calculated, it is represented at 68 g / t and is therefore more common than tin or lead. Important deposits are located in Scandinavia, the USA, the Congo, South Africa and India. The world-wide known cerium reserves are estimated at 40 million tons. Cerium is one of the so-called light rare earths that the BGR assessed in 2014 as uncritical with regard to the supply situation. Elemental (solid) cerium does not occur on earth because of its high reactivity. However, it has been found in microscopic particles in lunar rocks. It is probably caused by impact events on the moon. ...
0109] Into a 600 ml glass beaker with a magnetic stir bar was introduced 500 ml of high purity (HP) water. A 1.605 gm quantity of DL-arginine was dissolved in this volume and the solution was heated to about 40° C., thereby forming an alkaline solution. An aqueous solution containing a 10.0 gm quantity of Ce(NO3)36(H2O) was added under high shear mixing conditions provided by a Silverson L4RT high shear mixer operated at about 5000 RPM, resulting in a pale orange colored solution of about pH 7.9. The molar ratio of DL-arginine to cerium ion was 0.4. Then a 10 ml solution containing 1.2 gm of 50% H2O2 (0.75 molar ratio of H2O2 to cerium ion) was added slowly to the cerium and arginine solution mixture, which lowered the pH to about 3.4, and formed a turbid dark brown/orange suspension. The pH was further adjusted to about 2 by the addition of 1N HNO3, thereby forming a clear orange liquid. The reaction product was then stirred with a magnetic stir bar for 1 hour at 40° C. After cooling ...
Semantic Scholar extracted view of Measurement of intracortical flow distribution in hypothermic isolated perfused kidneys. by Andrew Small et al.
Isotopes[edit]. Main article: Isotopes of lutetium. Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and ... Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... to produce isotopes of ytterbium), with some alpha and positron emission; the heavier isotopes decay primarily via beta decay, ... Iso-tope Abun-dance Half-life (t1/2) Decay mode Pro-duct ... Aside from stable lutetium, its radioactive isotopes have ...
All thorium compounds are radioactive because there are no stable isotopes of thorium. Thoria exists as two polymorphs. One has ... Other binary oxides with fluorite structure include cerium dioxide, uranium dioxide and plutonium dioxide.)[clarification ... cerium(IV) oxide. Even as late as the 1980s it was estimated that about half of all ThO2 produced (several hundred tonnes per ... it must be used as a nuclear reactor fuel in conjunction with fissile isotopes of either uranium or plutonium. This can be ...
These give off bursts of light when stimulated by an isotope, which can easily be measured. Ligands are radiolabeled using ... It works through crystal lattice beads, which are coated with ligand coupling molecules and filled with cerium ions. ...
... "heavy isotopes" (of a given element) and "heavy nuclei" mean what could be understood in the common language-isotopes of high ... The main oxidation state is predicted to be +4, similar to cerium and thorium. A first ionization energy of 5.651 eV and second ... Additionally, the isotopes 308-310Ubb are predicted to have half-lives under 1 microsecond, too short for detection as a result ... A quantum tunneling model predicts the alpha-decay half-lives of unbibium isotopes 284-322Ubb to be on the order of ...
By definition, they are all isotopes of even-Z elements, where they are a minority in comparison to the even-even isotopes ... Among the 41 even-Z elements that have a stable nuclide, only two elements (argon and cerium) have no even-odd stable nuclides ... have two odd-even stable isotopes each. This makes a total of 30×1 + 9×2 = 48 stable odd-even isotopes. There are also five ... have one stable odd-even isotope, the elements technetium ( 43Tc ) and promethium ( 61Pm ) have no stable isotopes, and nine ...
IsotopesEdit. Main article: Isotopes of caesium. Caesium has 39 known isotopes, ranging in mass number (i.e. number of nucleons ... Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... "Isotope Tracers Project - Resources on Isotopes - Cesium". National Research Program - U.S. Geological Survey. Retrieved 2010- ... Not to be confused with cerium.. Caesium (IUPAC spelling[6]) or cesium (American spelling)[note 1] is a chemical element with ...
Many of the fission products decay through very short-lived isotopes to form stable isotopes, but a considerable number of the ... After two to three years, cerium-144/praseodymium-144, ruthenium-106/rhodium-106, and promethium-147 are responsible for the ... The Chernobyl accident released a large amount of caesium isotopes which were dispersed over a wide area. 137Cs is an isotope ... At least three isotopes of iodine are important. 129I, 131I (radioiodine) and 132I. Open air nuclear testing and the Chernobyl ...
Cerium-144 and Zirconium-95 (both relatively short lived isotopes with a half life of 285 and 64 days respectively) made up 91 ...
He also worked on iodine speciation in seawater and porewaters, the separation of cerium from other rare earth elements in a ... He became one of the first low-temperature geochemists to appreciate how radiogenic isotopes might be used to solve the ... He made his name in ocean chemistry and palaeochemistry, using trace metals and isotopes in biogenic carbonate as ... "Sr isotope composition of sea water over the past 75 Myr". Nature. 314 (6011): 526-528. Bibcode:1985Natur.314..526P. doi: ...
Strontium in its non-nuclear isotope is stable and harmless, however, when the radioactive isotope, Sr90, is released into the ... Cerium and Lanthanum can cause irreversible damage to marine life by deteriorating cell membranes, affecting reproductive ... The shortest half-life for the previous elements is Zr95, an isotope of zirconium which takes 1.4 hours to decay. The longest ... and attached to these particles were Cerium, Zirconium, Lanthanum, and Strontium. All of these elements have low volatility, ...
Periodic Table with isotope decay chain displays. Click on element, and then isotope mass number to see the decay chain (link ... A great deal of the lighter lanthanides (lanthanum, cerium, neodymium, and samarium) are formed as fission products. In Africa ... The isotopes are listed by element, in order by atomic number. Neutron capture by the nuclear fuel in nuclear reactors and ... The only stable isotope of niobium has mass number 93, and fission products of mass 93 become relatively stable zirconium-93 ( ...
In those days, the first separation was into two main groups, the cerium earths (scandium, lanthanum, cerium, praseodymium, ... The longest-lived isotope of promethium has a half-life of 17.7 years, so the element exists in nature in only negligible ... All isotopes of promethium are radioactive, and it does not occur naturally in the earth's crust; however, a trace amount is ... Parts per million in earth's crust, e.g. Pb=13 ppm No stable isotopes occurring in nature. A mnemonic for the names of the ...
10 Stable isotopes. *11 Half life of tellurium-130. *12 Cerium-136 ... But looking at isotopes from Tl to Ra, the missing isotopes are: 206Tl, 207Tl, 208Tl, 210Tl, 211Pb, 214Pb, 211Bi, 214Bi, 215Bi ... There are 4 categories of isotopes, Namely EE, EO, OE, and OO, with the EE,s having the majority of stable isotopes. Also, ... Stable isotopes[edit]. H-1, H-2 He-3, He-4 Li-6, Li-7 Be-9 B-10, B-11 C-12, C-13 N-14, N-15 O-16, O-17, O-18 F-19 Ne-20, Ne-21 ...
All known thorium isotopes are unstable. The most stable isotope, 232Th, has a half-life of 14.05 billion years, or about the ... In the periodic table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ... An even number of either protons or neutrons generally increases nuclear stability of isotopes, compared to isotopes with odd ... Elements with odd atomic numbers have no more than two stable isotopes; even-numbered elements have multiple stable isotopes, ...
... cerium-144, ruthenium-106, cobalt-60, curium-242, americium-241 and thulium isotopes have also been studied.[citation needed] ... Particularly at risk is the skeleton, the surface of which is likely to absorb the isotope, and the liver, where the isotope ... Plutonium-238, curium-244 and strontium-90 are the most often cited candidate isotopes, but other isotopes such as polonium-210 ... An isotope with twice the half-life and the same energy per decay will release power at half the rate per mole. Typical half- ...
The primary decay mode of isotopes lighter than 141Pr is positron emission or electron capture to isotopes of cerium, while ... This isotope has 82 neutrons, a magic number that confers additional stability. This isotope is produced in stars through the s ... Cette raison a engagé M. Mosander à donner au nouveau métal le nom de Lantane." (The oxide of cerium, extracted from cerite by ... The Pr3+ ion is similar in size to the early lanthanides of the cerium group (those from lanthanum up to samarium and europium ...
The primary decay products before 141Pr are element 58 (cerium) isotopes and the primary products after are element 60 ( ... Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC ... All of the remaining radioactive isotopes have half-lives that are less than 5.985 hours and the majority of these have half- ... Isotope masses from: Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation ...
Among the 41 even-Z elements that have a stable nuclide, only two elements (argon and cerium) have no even-odd stable nuclides ... eight have six stable isotopes, ten have five stable isotopes, nine have four stable isotopes, five have three stable isotopes ... For the 80 elements that have one or more stable isotopes, the average number of stable isotopes is 252/80 = 3.15 isotopes per ... Halbwertszeiten aller Isotope Exploring the Table of the Isotopes at the LBNL Current isotope research and information isotope. ...
1966). "Determination of cerium, gadolinium, dysprosium, erbium, and ytterbium". Bunseki Kagaku. 15 (6): 589-594. doi:10.2116/ ... In addition to the use of stable isotopes, radioactive isotopes can be employed in isotope dilution which is often encountered ... All isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots ... Consider a natural analyte rich in isotope iA (denoted as A), and the same analyte, enriched in isotope jA (denoted as B). Then ...
No odd-neutron-number isotope is the most naturally abundant isotope in its element, except for beryllium-9 (which is the only ... cerium-140, praseodymium-141, neodymium-142, and samarium-144, as well as the radioactive primordial nuclide xenon-136. Except ... This word was formed by replacing the p in isotope with n for neutron. Nuclides that have the same mass number are called ... Most odd neutron numbers have at most one stable isotope (exceptions are 1 (2H and 3He), 5 (9Be and 10B), 7 (13C and 14N), 55 ( ...
All other radioactive cerium isotopes have half-lives under four days, and most of them have half-lives under ten minutes. The ... Water should not be used to stop cerium fires, as cerium reacts with water to produce hydrogen gas. Workers exposed to cerium ... Cooling below approximately −160 °C will start formation of α-cerium but this is only from remaining γ-cerium. β-cerium does ... Greenwood and Earnshaw, p. 1228 Klaus Reinhardt and Herwig Winkler in "Cerium Mischmetal, Cerium Alloys, and Cerium Compounds" ...
Elements have been named for celestial bodies (helium, selenium, tellurium, for the Sun, Moon, and Earth; cerium and palladium ... neither of the two has any isotope sufficiently stable to occur in nature on Earth in significant quantities. The connection to ...
Naturally occurring cerium (58Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce, with 140Ce being the most ... The isotopes of cerium range in atomic weight from 119 u (119Ce) to 157 u (157Ce). mCe - Excited nuclear isomer. ( ) - ... Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC ... All of the remaining radioactive isotopes have half-lives that are less than 4 days and the majority of these have half-lives ...
Hofmann, Sigurd (August 2015). "Search for Isotopes of Element 120 on the Island of SHN". Search for Isotopes of Element 120 ON ... This activity was also proposed to be caused by nuclear transmutations in natural cerium, raising further ambiguity upon this ... Isotopes of unbinilium are predicted to have alpha decay half-lives of the order of microseconds. Initial analysis revealed ... Therefore, the isotopes of most interest are 310126, 322126, and 354126, for these might be considerably longer-lived than ...
Barium-134 Barium-135 Barium-136 Barium-137 Barium-138 Lanthanum-139 Cerium-136 (2E)* Cerium-138 (2E)* Cerium-140 Cerium-142 (A ... Stable isotopes: 1 element (tin) has 10 stable isotopes 5 elements have 7 stable isotopes apiece 7 elements have 6 stable ... The rest have more than one stable isotope. Tin has ten stable isotopes, the largest number of stable isotopes known for an ... The mean number of stable isotopes for elements which have at least one stable isotope is 252/80 = 3.15. Stability of isotopes ...
Aston's work on isotopes won him the 1922 Nobel Prize in Chemistry for the discovery of isotopes in a large number of non- ... cerium and light platinoids. Meitner and her nephew Otto Frisch immediately and correctly interpreted these observations as ... Soddy called these chemically identical elements isotopes. For his study of radioactivity and the discovery of isotopes, Soddy ... By 1920 chemical isotopes had been discovered, the atomic masses had been determined to be (approximately) integer multiples of ...
Another isotope 240Cm was produced in a similar reaction in March 1945: Pu. 94. 239. +. He. 2. 4. ⟶. Cm. 96. 240. +. 3. 0. 1. n ... Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Another interesting for research isotope 245Cm can be obtained from the α-decay of 249Cf, and the latter isotope is produced in ... The most efficient preparation method of this isotope is via α-decay of the californium isotope 252Cf, which is available in ...
The element occurs naturally, but all isotopes have a relatively short half-life in geological terms. He also dealt with ... The mineral perrierite ( perrierite (Ce) ) is named in his honor, a black to dark brown monoclinic group silicate with cerium, ...
Naturally occurring cerium (58Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce, with 140Ce being the most ... The isotopes of cerium range in atomic weight from 119 u (119Ce) to 157 u (157Ce). mCe - Excited nuclear isomer. ( ) - ... Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC ... All of the remaining radioactive isotopes have half-lives that are less than 4 days and the majority of these have half-lives ...
Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. Ce-136, 138, and 142 ... Cerium Isotopes. Subscribe to New Research on Cerium Isotopes Stable cerium atoms that have the same atomic number as the ... element cerium, but differ in atomic weight. Ce-136, 138, and 142 are stable cerium isotopes. ...
Continuous-flow IRMS technique for determining the 17O excess of CO2 using complete oxygen isotope exchange with cerium oxide D ... unmodified CO2 and CO2 after complete oxygen isotope exchange with cerium oxide (CeO2) at 700 °C. Thus, a single measurement of ... Continuous-flow IRMS technique for determining the 17O excess of CO2 using complete oxygen isotope exchange with cerium oxide, ... are performed using isotope ratio mass spectrometry (IRMS). The 17O excess (Δ17O) is derived from isotope measurements on two ...
... cerium (Ce), atomic number 58, atomic weight 140.115; and praseodymium (Pr), atomic number 59, atomic weight 140.9076. Using ... 2.4 - Neon has three stable isotopes, one with a small...Ch. 2.4 - 1. Which is the more abundant isotope of copper,...Ch. 2.4 ... 2 - Which of the following are isotopes of element X,...Ch. 2 - Thallium has two stable isotopes, 203TIand 205Tl....Ch. 2 - ... 2 - Cobalt has three radioactive isotopes used in...Ch. 2 - Naturally occurring silver exists as two isotopes...Ch. 2 - Name ...
Radioactive isotopes and enriched stable isotopes are used widely in medicine, agriculture, industry, and... ... Cerium-141 • For research and development on lung densities. Cesium-137 • To treat cancer; to measure correct patient dosages ... However, isotope programs have always depended on the "parasitic" use of reactors, whose primary use was not related to isotope ... Radioactive isotopes and enriched stable isotopes are used widely in medicine, agriculture, industry, and science, where their ...
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 07 ISOTOPES AND RADIATION SOURCES; BERYLLIUM FLUORIDES; CERIUM ... FLUORIDES; CERIUM OXIDES; CHEMICAL REACTIONS; ELECTRON TRANSFER; ISOTOPIC EXCHANGE; LANTHANUM FLUORIDES; LANTHANUM OXIDES; ...
Isotopes nes, compounds. Cerium compounds. Compounds, mixes of rare-earths, yttrium, scandium ne. Hydrogen peroxide. Phosphides ... Trade of goods , US$, HS 1992, 28 Inorganic chemicals, precious metal compound, isotope. Search glossaries. Source: Commodity ...
Cerium doped Barium Titanate Ce:BaTiO3 bulk & research qty manufacturer. Properties, SDS, Applications, Price. Free samples ... Titanium has five naturally occurring isotopes: 46Ti through 50Ti, with 48Ti being the most abundant (73.8%). Titanium is found ... Cerium. 58 Ce 140.116000000 Cerium See more Cerium products. Cerium (atomic symbol: Ce, atomic number: 58) is a Block F, Group ... The cerium atom has a radius of 182.5 pm and a Van der Waals radius of 235 pm. In its elemental form, cerium has a silvery ...
Thus, to be electrically neutral, cerium must have 58 protons and 58 electrons. 140 Ce is its most abundant isotope with 140 - ... The stable isotope 133 Cs has 78 neutrons. The most commonly used unstable isotope 137 Cs has 82 neutrons. There are isotopes ... 113 isotope or 115-49=66 neutrons in In -115 isotope, both are natural occurring isotopes of In (5% and 95% respectively). ... The three stable isotopes of lead are 206 Pb, 207 Pb, and 208 Pb. These isotopes have 124, 125, and 126 neutrons per each atom ...
For cerium, the photopeak of 141Ce at 145 keV was used. For samarium, the isotope 153Sm is used. As far as europium is ... The isotopes 140La, 141Ce, and 147Nd commonly used in the activation analysis of the corresponding elements are also produced ... A. El-Taher, "INAA and DNAA for uranium determination in geological samples from Egypt," Applied Radiation and Isotopes, vol. ... However, the combined peaks can be used as these are obtained from two isotopes of the same element and have similar half-lives ...
1966). "Determination of cerium, gadolinium, dysprosium, erbium, and ytterbium". Bunseki Kagaku. 15 (6): 589-594. doi:10.2116/ ... In addition to the use of stable isotopes, radioactive isotopes can be employed in isotope dilution which is often encountered ... All isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots ... Consider a natural analyte rich in isotope iA (denoted as A), and the same analyte, enriched in isotope jA (denoted as B). Then ...
Cerium, isotope of mass140. Ce. 158515-37-8. 5-Benzofuranaceticacid, 6-ethenyl-2,4,5,6,7,7a-hexahydro-7a-hydroxy-3,6-dimethyl-a ...
Substances used include chromium oxide (Cr2O3) and radio-isotopes such as cerium-141. A variety of inert materials have been ...
METALLURGY ALLOYS CERIUM AND ......420/1+ NUCLEAR REACTIONS & SYSTEMS .......376 NEUTRON TYPE SYSTEM ............250/390.1+ ... RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT ........................423/249+ TECHNETIUM RADIOACTIVE METAL ......432/2+ ORGANIC ...
... on Saturday said an explosion during missile testing in the Arctic left five workers dead and involved radioactive isotopes ... Isotope sources use various types of fuel: plutonium, promethium or cerium," Zhuikov said. ... Rosatom said its staff were providing engineering and technical support for the "isotope power source" of a missile. ... An expert from Moscows Institute for Nuclear Research, Boris Zhuikov, told RBK independent news site that isotope power ...
... the isotopes strontium-90, iodine-131, and cerium-144 emit beta particles that are not distributed evenly in the body. ... Strontium-90 releases only beta particles, while iodine-131 and cerium-144 release both beta particles and gamma rays, but ... Other articles where Cerium-144 is discussed: poison: Local toxicities of common beta-particle emitters: … ... the isotopes strontium-90, iodine-131, and cerium-144 emit beta particles that are not distributed evenly in the body. ...
Isotopes[edit]. Main article: Isotopes of lutetium. Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and ... Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... to produce isotopes of ytterbium), with some alpha and positron emission; the heavier isotopes decay primarily via beta decay, ... Iso-tope Abun-dance Half-life (t1/2) Decay mode Pro-duct ... Aside from stable lutetium, its radioactive isotopes have ...
ENMs were neutron activated, forming gamma emitting isotopes 141Ce and 65Zn, respectively. Calu-3 lung epithelial cells ... Toxicology; Nanotechnology; Cerium-compounds; Zinc-compounds; Silicon-compounds; Dioxides; Oxides; Lung-function; Lung-cells; ... Metal-oxides; Metal-compounds; Neutron-activation-spectrometry; In-vitro-study; Isotope-effect; Gamma-rays; Dispersion; ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... Late Pleistocene Oxygen-Isotope Records of Biogenic Silica from the Atlantic Sector of the Southern-Ocean ... Tracking the sources of icebergs with lead isotopes: The provenance of ice-rafted debris in Heinrich layer 2 ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... Late Pleistocene Oxygen-Isotope Records of Biogenic Silica from the Atlantic Sector of the Southern-Ocean ... Pathways and mean residence times of dissolved pollutants in the ocean derived from transient tracers and stable isotopes ... Tracking the sources of icebergs with lead isotopes: The provenance of ice-rafted debris in Heinrich layer 2 ...
Neutron-induced activation cross-sections on natural Cerium up to 20 MeV.. Evaluation of optical potential for (n,2n) cross ... section reactions and yields for spherical zirconium isotopes. Producing a cross-section of a river channel is fundamental to ...
Cohen, A. A.: The isotopes of cerium and rhodium. Phys. Rev. 63, 219 (1943).Google Scholar ... Nier, A. O. C.: A mass spectrometer to routine isotope abundance measurements. Rev. sci. Instrum. 11, 212-216 (1940).ADSGoogle ...
Cerium 141 (Ce 141) Cerium 143 (Ce 143) Cerium 144 (Ce 144) Cesium 131 (Cs... ... The isotope composition was the most diverse (60Co, 65Zn, 85Sr, 99Mo, 106Ru, 137Cs, 144Ce) in internal organs of grayling. The ... Carbon stable isotope composition (delta 13C) of lichen thalli in the forests in the vicinity of the Chernobyl atomic power ... A novel Cerium-141 based flood field uniformity phantom: Assessment of its suitability to perform daily uniformity test in a ...
Cerium. A chemical element, Ce, atomic number 58, atomic weight 140.12. It is the most abundant metallic element of the rare- ... Its discovery and production have been based upon artificial nuclear transmutation of radioactive isotopes of lighter elements ... The naturally occurring element is made up of the isotopes 136Ce, 138Ce, 140Ce, and 142Ce. A… ...
Cerium. A chemical element, Ce, atomic number 58, atomic weight 140.12. It is the most abundant metallic element of the rare- ... The isotope of the element hydrogen with atomic weight 2.0144 and symbols 2H or D. Considerations of nuclear stability and a ... A chemical element, Cr, atomic number 24, and atomic weight 51.996, which is the weighted average for several isotopes weighing ... Its discovery and production have been based upon artificial nuclear transmutation of radioactive isotopes of lighter elements ...
Neodymium has an isotope with a mass-to-charge (m/z) ratio of 150. It is a doubly-charged species and therefore the mass ... About 2 years ago we learned that products were available that contained over 30% Cerium (Ce). In late summer 2016, the village ... Cerium (Ce) levels, however, stayed fairly constant at over 10% (10,000 ppm) of the product. ... It has been documented that RE metals, particularly Cerium (Ce) and Lanthanum (La) pose spectral overlap problems in ...
Isotopes. Only one naturally occurring isotope of holmium exists, holmium-165. Isotopes are two or more forms of an element. ... see also Cerium; Dysprosium; Erbium; Europium; Gadolinium; Lutetium; Neodymium; Praseodymium; Promethium; Samarium; Terbium; ... Each variation is an isotope.. At least 20 radioactive isotopes of holmium are known also. A radioactive isotope is one that ... Isotopes differ from each other according to their mass number. The number written to the right of the elements name is the ...
10 -4more » M), the rate-determining step (RDS) was a proton-coupled oxidation of the catalyst by cerium(IV) with direct ... kinetic isotope effects (KIE , 1). At low catalyst concentration (ca. ≤10 -6 M), the RDS was a bimolecular step with k H/k D ≈ ... Stopped-flow measurements of cerium(IV)-driven water oxidation at pH 1 revealed two distinct kinetic regimes depending on ...
Technical summary reports, technical documents for numerous isotopes (e.g., actinium, polonium, cerium), monthly reports, heat ... Personnel external exposure reports, whole body count data, bioassay data, health physics procedures, isotope information, ...
Main article: Isotopes of cerium iso NA half-life DM DE (MeV) DP ... Ang ceryo (Iningles cerium) mao ang elementong kimiko sa ...
  • Deuterium , also called heavy hydrogen , is a stable isotope of Hydrogen. (answers.com)
  • The stable isotope 133 Cs has 78 neutrons. (answers.com)
  • The most stable isotope of sulfur (S-32) has 16 electrons, 16 protons and 16 neutrons. (answers.com)
  • It has only one stable isotope, caesium-133 . (wikipedia.org)
  • Naturally occurring lanthanum consists of one stable isotope ( 139 La) and one radioactive ( 138 La) isotope, with the stable isotope, 139 La, being the most abundant (99.91 percent natural abundance). (newworldencyclopedia.org)
  • The most stable isotope of hassium, hassium-277, has a half-life of approximately 11 min. (thefreedictionary.com)
  • 2014 Adam Laycock (Imperial College, London), "Synthesis and characterisation of stable isotope labelled nanomaterials", 2nd supervisor. (birmingham.ac.uk)
  • All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. (bardinetgastronomie.com)
  • the most stable isotope of plutonium is plutonium-244 , with a half-life of about 80 million years, long enough to be found in trace quantities in nature. (thefullwiki.org)
  • The unstable (radioactive) isotope is silicon-32 with 18 neutrons (half-life 170 years). (answers.com)
  • Lutetium-176 is a relatively abundant (2.5%) radioactive isotope with a half-life of about 38 billion years, used to determine the age of minerals and meteorites . (wikipedia.org)
  • A radioactive isotope is one that breaks apart and gives off some form of radiation. (encyclopedia.com)
  • The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. (wikipedia.org)
  • A total of 31 radioactive isotope s of neodymium (excluding nuclear isomers) have been characterized, ranging in mass from 124 to 161 and in half-life from 0.65 second (neodymium-125) to 7.9 × 10 18 years (neodymium-150). (britannica.com)
  • Einsteinium's atomic number is 99 but Es has 19 known isotopes. (answers.com)
  • All of the known isotopes of promethium are radioactive. (encyclopedia.com)
  • None of the twenty-five known isotopes of thorium (with atomic masses ranging between 212 and 236) is stable. (chemistryexplained.com)
  • The known isotopes of cadmium range in atomic mass from 94.950 u ( 95 Cd) to 131.946 u ( â ¦ The chemical symbol for Thulium is Tm. (bardinetgastronomie.com)
  • Although superior energy resolution may be observed, one major barrier that has hindered the rapid adaptation of lanthanum halides is their self-activity, due primarily to the presence of isotope 138 La, and the α contamination, due to the trace amount of actinides. (spie.org)
  • Lanthanum was discovered in 1839 by Swedish chemist Carl Gustav Mosander, when he partially decomposed a sample of cerium nitrate by heating and treating the resultant salt with dilute nitric acid . (newworldencyclopedia.org)
  • Natural lanthanum is a mixture of two stable isotopes, 138 La and 139 La. Twenty three other radioactive isotopes are recognized. (lanl.gov)
  • Of the rare earths, only yttrium , lanthanum , and cerium are more plentiful than neodymium. (britannica.com)
  • Mosander was looking for impurities in cerium when he found lanthanum. (reference.com)
  • 4%, has been achieved with an oxide scintillator, Cerium-doped Gadolinium Yttrium Gallium Aluminum Garnet, or GYGAG(Ce). (spiedigitallibrary.org)
  • Nanomaterials like cerium oxide and barium sulfate are frequently processed in industrial and consumer products and exposure of humans and other organisms is likely. (biomedcentral.com)
  • Subjects of this study were cerium oxide and barium sulfate nanoparticles. (biomedcentral.com)
  • The nucleus of deuterium is called a deuteron , contains ONE proton and (typically for the deuterium isotope) ONE neutron, whereas the far more common hydrogen nucleus contains no neutron. (answers.com)
  • The nucleus itself contains protons and neutrons (with the exception of protium, an isotope of hydrogen with only a proton in the nucleus). (sciencing.com)
  • Hydrogen, for example, has only one proton in its nucleus, but an isotope of hydrogen called deuterium has a neutron in addition to the proton. (sciencing.com)
  • For example, there are three isotopes of hydrogen that have none, one, or two neutrons in the nucleus. (scribd.com)
  • The two lightest isotopes of hydrogen are stable, while the third is unstable. (scribd.com)
  • Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. (curehunter.com)
  • Atoms of the same element can exist with different numbers of neutrons - these are what we call isotopes. (answers.com)
  • Radioactive isotopes are produced when very small particles are fired at atoms. (encyclopedia.com)
  • https://en.wikiversity.org/wiki/Rydberg_Atoms/Rydberg_matter. (freepatentsonline.com)
  • In 10 days of bombardment, they successfully produced three atoms of an isotope of element 108 with mass number 265 and a half-life half-life, measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. (thefreedictionary.com)
  • So the time it takes for half the atoms in a particular sample isotope to decay is called the Half Life of that isotope. (scribd.com)
  • Cerium is the most abundant of the rare earth metals . (americanelements.com)
  • The most abundant isotope is 232 Th, with a half-life of 1.4 × 10 10 years. (chemistryexplained.com)
  • Cerium is one of the most abundant among the rare earth elements. (byjus.com)
  • Despite their name, rare-earth elements are - with the exception of the radioactive promethium - relatively plentiful in Earth's crust , with cerium being the 25th most abundant element at 68 parts per million, or more abundant than copper. (wikipedia.org)
  • Isotopes are variants of a particular chemical element which differ in neutron number. (wikipedia.org)
  • ENMs were neutron activated, forming gamma emitting isotopes 141Ce and 65Zn, respectively. (cdc.gov)
  • Neutron-induced activation cross-sections on natural Cerium up to 20 MeV. (thefreedictionary.com)
  • Berkeley Nucleonics offers isotope identification backpacks (backpack radiation detectors) for clandestine monitoring of gamma and neutron radiation. (berkeleynucleonics.com)
  • [3] The first such mineral discovered was gadolinite , a mineral composed of cerium, yttrium, iron, silicon and other elements. (wikipedia.org)
  • thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table. (wikipedia.org)
  • Cerium is a soft, malleable, ductile metal with an atomic number 58 and represented by the symbol Ce in the Periodic Table . (byjus.com)
  • Now, to get back to the so-called stable elements, the even numbered elements in the periodic table have more isotopes than the odd numbered elements. (oclc.org)
  • Ce:BaTiO 3 (Cerium-doped Barium Titanate) is a crystalline solid used as a semiconductor and in photo optic applications. (americanelements.com)
  • Symbol Sm A silvery-white metallic element of the lanthanide series that exists in several forms and has seven naturally occurring isotopes. (thefreedictionary.com)
  • An early application of isotope dilution in the form of radiotracer method was determination of the solubility of lead sulphide and lead chromate in 1913 by George de Hevesy and Friedrich Adolf Paneth. (wikipedia.org)
  • Martin is interested in all aspects of geochemistry, but with a particular focus on the application of isotope and trace element tracers to studying the biogeochemistry of Earth Surface processes. (southampton.ac.uk)
  • CO 2 is separated from bulk air by gas chromatography and CO 2 isotope ratio measurements (ion masses 45 / 44 and 46 / 44) are performed using isotope ratio mass spectrometry (IRMS). (atmos-meas-tech.net)
  • Isotope dilution is almost exclusively employed with mass spectrometry in applications where high-accuracy is demanded. (wikipedia.org)
  • Mass cytometry leverages inductively coupled mass spectrometry to perform high dimensional single cell analyses using antibodies tagged with rare earth isotopes that are considered to be largely absent in biological samples. (fluidigm.com)
  • Previous investigations of Ln's have largely been based on determinations by isotope dilution thermal ionization mass spectrometry (ID-TIMS). (scirp.org)
  • Ln's are also often used as tracers in studies on natural environments because of their similar but consecutively changing ato- mic and ionic properties and frequently observed anomalous behaviors of cerium (Ce) and europium (Eu). (scirp.org)
  • The most commonly used unstable isotope 137 Cs has 82 neutrons. (answers.com)
  • so that an unstable isotope has decayed into a stable one, an isotope of helium. (scribd.com)
  • The mass of isotope-1 is 135 .9090u and its abundance is 0 .193% . (bartleby.com)
  • The mass of isotope-2 is 137 .9057u and its abundance is 0 .250% . (bartleby.com)
  • The mass of isotope-3 is 139 .9053u and its abundance is 88 .48% . (bartleby.com)
  • The mass of isotope-4 is 141 .9090u and its abundance is 11 .07% . (bartleby.com)
  • Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. (bardinetgastronomie.com)
  • different isotopes, however, have different numbers of neutrons in their nuclei. (sciencing.com)
  • Since the charge is what characterizes an element, nuclei with different numbers of neutrons in the nucleus, but the same number of protons, are called isotopes of that element. (scribd.com)
  • An element, therefore, can have several variants, called isotopes, which differ slightly in the composition of the nucleus. (sciencing.com)
  • Isotopes are generally designated by the mass number, which is the number of protons and neutrons in a nucleus of that isotope. (sciencing.com)
  • Boron (symbol B, atom number 5) is build up with: 5 protons, 5 electrons and 5 or 6 neutrons , depending on the mass number of the two possible isotopes : B-(10) has 5 neutrons and B-(11) has 6 of them respectively. (answers.com)
  • Copper has 29 protons, 34 or 36 neutrons (depending on which isotope) and 29 electrons. (answers.com)
  • The result is the number of electrons in the isotope. (sciencing.com)
  • Elemental ("solid") cerium does not occur on earth because of its high reactivity. (zxc.wiki)
  • Here we present new high‐resolution neodymium‐, carbon‐, and oxygen‐isotope data, as well as elemental chromium concentrations and cerium anomalies, from the English Chalk exposed at Dover, UK, which we evaluate in the context of >400 records from across the globe. (archives-ouvertes.fr)
  • Cerium dioxide nanoparticles (CeO 2 NPs) have the ability to modify disease outcome but have not been investigated for their effect on models of asthma and inflammatory lung disease. (biomedcentral.com)
  • Isotope sources use various types of fuel: plutonium, promethium or cerium," Zhuikov said. (taipeitimes.com)
  • Fifteen isotopes of promethium are known. (encyclopedia.com)
  • The only isotope generally available is promethium-147, with a half life of 2.64 years. (encyclopedia.com)
  • Locate the mass number (the sum of the protons and neutrons) of the isotope. (sciencing.com)
  • Mosander in 1839 extracted lanthana from impure cerium nitrate and recognized the new element. (lanl.gov)
  • Our analytical system is a promising tool for investigating the triple oxygen isotope composition of CO2 from stratospheric air samples of volumes 100ml and smaller. (atmos-meas-tech.net)
  • Consider a natural analyte rich in isotope iA (denoted as A), and the same analyte, enriched in isotope jA (denoted as B). Then, the obtained mixture is analyzed for the isotopic composition of the analyte, RAB = n(iA)AB/n(jA)AB. (wikipedia.org)
  • The retention of a cerium anomaly in these upper Doushantuo phosphorites implies that oxidising conditions prevailed during early diagenetic REE scavenging, indicating that these samples are more likely to retain a seawater sulphur isotope composition. (edu.au)
  • Natural neodymium is a mixture of seven different isotopes . (britannica.com)
  • There are four isotopes for the element. (bartleby.com)
  • Cerium (atomic symbol: Ce, atomic number: 58) is a Block F, Group 3, Period 6 element with an atomic weight of 140.116. (americanelements.com)
  • Number of neutrons = Atomic mass of an isotope - Atomic number of the element. (answers.com)
  • All isotopes of a given element have the same number of protons in each atom. (wikipedia.org)
  • Isotopes are two or more forms of an element. (encyclopedia.com)
  • t͡seːɐ̯ (also] cerium or cerium called) is a chemical element with the element symbol Ce and atomic number 58. (zxc.wiki)
  • This is the number of protons the isotope has, since the element and all its isotopes have the same atomic number. (sciencing.com)
  • including scores of properties, element names in many languages, most known nuclides of Cerium. (environmentalchemistry.com)
  • Cerium, an element in the lanthanide series, has a number of radioactive isotopes. (tailieu.vn)
  • Different radioactive isotopes take varying amounts of time to decay away into the next element along the chain. (scribd.com)
  • Cerium is a Block F, Group 3, Period 6 element. (rotaperiod.com)
  • The next element is lithium, which has two isotopes. (oclc.org)
  • With the use of autoradiography in the musculoskeletal system, isotopes have been incorporated into both the organic and inorganic components of animal bony skeleton. (openorthopaedicsjournal.com)
  • Our analytical system is a promising tool for investigating the triple oxygen isotope. (atmos-meas-tech.net)
  • In particular, an interval of cooling has been detected in the English Chalk on the basis of an invasive boreal fauna and bulk oxygen‐isotope excursions registered during the early stages of OAE 2-a phenomenon known as the Plenus Cold Event (PCE), which has tentatively been correlated with climatic shifts worldwide. (archives-ouvertes.fr)
  • The isotopes of cerium range in atomic weight from 119 u (119Ce) to 157 u (157Ce). (wikipedia.org)
  • Isotope dilution analysis is a method of determining the quantity of chemical substances. (wikipedia.org)
  • This article is supported by WikiProject Elements , which gives a central approach to the chemical elements and their isotopes on Wikipedia. (wikipedia.org)
  • N raa, Tomas: Archean crust development from a zircon Hf isotope perspective. (uu.nl)
  • Francolite-bound sulphate sulphur isotope compositions from the 570±20 Ma Doushantuo Formation are used to constrain seawater δ34S during the late Neoproterozoic. (edu.au)
  • How to Find Isotope Mass." Sciencing , http://sciencing.com/isotope-mass-8340660.html. (sciencing.com)
  • Phosphorites of the lower ore have δ34S compositions between 32.3‰ and 37.8‰, averaging 36.1‰, δ13C values between −4‰ and −1‰, and do not exhibit anomalous cerium depletion. (edu.au)
  • In addition, unlike traditional analytical methods which rely on signal intensity, isotope dilution employs signal ratios. (wikipedia.org)
  • In its most simple conception, the method of isotope dilution comprises the addition of known amounts of isotopically-enriched substance to the analyzed sample. (wikipedia.org)
  • Mixing of the isotopic standard with the sample effectively "dilutes" the isotopic enrichment of the standard and this forms the basis for the isotope dilution method. (wikipedia.org)
  • Isotope dilution is classified as a method of internal standardisation, because the standard (isotopically-enriched form of analyte) is added directly to the sample. (wikipedia.org)
  • Owing to both of these advantages, the method of isotope dilution is regarded among chemistry measurement methods of the highest metrological standing. (wikipedia.org)
  • Analytical application of the radiotracer method is a forerunner of isotope dilution. (wikipedia.org)
  • In the 1930s, US biochemist David Rittenberg pioneered the use of isotope dilution in biochemistry enabling detailed studies of cell metabolism. (wikipedia.org)
  • Isotope dilution is analogous to the mark and recapture method, commonly used in ecology to estimate population size. (wikipedia.org)
  • The number of fish native to the lake can be calculated using the following equation: n A = n B × 10 1 = 50 {\displaystyle n_{\mathrm {A} }=n_{\mathrm {B} }\times {\frac {10}{1}}=50} This is a simplified view of isotope dilution but it illustrates the method's salient features. (wikipedia.org)
  • For example, all National Metrology Institutes rely significantly on isotope dilution when producing certified reference materials. (wikipedia.org)
  • In addition to high-precision analysis, isotope dilution is applied when low recovery of the analyte is encountered. (wikipedia.org)
  • In addition to the use of stable isotopes, radioactive isotopes can be employed in isotope dilution which is often encountered in biomedical applications, for example, in estimating the volume of blood. (wikipedia.org)
  • Isotopes differ from each other according to their mass number. (encyclopedia.com)
  • Analyses of the site's sedimentology, fauna, flora, stable isotopes, rare earth elements (REE), charcoal content and taphonomy suggest a complex history starting with the deaths and transport of tyrannosaurids into a peri-fluvial, low-energy lacustrine setting. (peerj.com)
  • There are isotopes of cesium ranging all the way from 112 Cs at 57 neutrons to 151 Cs at 96 neutrons. (answers.com)
  • Here we evaluate and explore the use of carbonate cerium (Ce) anomalies (Ce/Ce*) as a quantitative atmospheric p O 2 proxy and provide estimates of Proterozoic p O 2 using marine carbonates from a unique Precambrian carbonate succession-the Paleoproterozoic Pethei Group. (pnas.org)
  • The most important isotope of plutonium is plutonium-239 , with a half-life of 24,100 years. (thefullwiki.org)
  • A negative carbon‐isotope excursion that correlates with the original 'PCE' is consistently expressed worldwide, and CO2 proxy records, where available, indicate a rise and subsequent fall in CO2 over the Plenus interval. (archives-ouvertes.fr)
  • As such, it is proposed that the Plenus carbon‐isotope event is a more reliable stratigraphic marker to identify the Plenus interval, rather than any climatic shifts that may have been overprinted by local effects. (archives-ouvertes.fr)
  • Other reactor-produced radioisotopes continue to play a major role in research, and recent advances in many fields (such as molecular biology, including the Human Genome Project) could not have been accomplished without the use of 32 P. In addition, many of the isotopes useful for therapeutic applications, such as strontium-89 for the palliation of metastatic bone pain, are produced in reactors. (nap.edu)
  • author) [French] Les auteurs ont etudie, au moyen do radioisotopes appropries et des procedes de comptage habituels, les reactions chimiques qui peuvent contribuer a l'elimination do certains constituants en solution dans des fluorures fondus. (osti.gov)
  • Cerium is one of the so-called light rare earths that the BGR assessed in 2014 as uncritical with regard to the supply situation. (zxc.wiki)
  • It usually occurs in combination with cerium and other rare earth elements. (newworldencyclopedia.org)
  • It is also strongly attacked in alkalis with the formation of cerium hydroxides. (zxc.wiki)
  • See also synthetic elements synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. (thefreedictionary.com)
  • All the transuranium elements of the actinide series were discovered as synthetic radioactive isotopes at the Univ. (thefreedictionary.com)
  • This paper examines the geochemistry, particularly trace elements and isotopes of geothermal fluids in relation to regional tectonics and discusses the geothermal potential of the Kırşehir. (usda.gov)
  • Thallium-205 Oxideis one of over 200 stable isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications. (americanelements.com)
  • Science learned how to create new substances, and certain isotopes of certain elements were found to possess the capacity to produce unprecedented amounts of energy, with the potential to cause tremendous damage during war, as well as produce enormous amounts of power for society's needs during peace. (pressbooks.pub)
  • Mr. Boyd Weaver: About sixty of the elements in nature, not including those that are made artificially by fission in reactors, have stable isotopes, or isotopes with very long half-lives. (oclc.org)
  • They split them off in different directions, and they discovered that they were isotopes, and then they began looking for isotopes of other elements. (oclc.org)
  • We have recently noted an unusual exception to this rule while analyzing tissue samples from patients undergoing surgical resection for early stage lung cancer, and here we present a detailed cytometric characterization of cerium in a clinical patient sample. (fluidigm.com)
  • High dimensional immune cell mapping revealed that high levels of cerium were specifically associated with a phenotypically distinct subset of lung macrophages that were most prevalent in noninvolved lung tissue, whereas tumor associated macrophages showed relatively lower levels of cerium. (fluidigm.com)
  • Constant exposure to Cerium may cause lung problems and other serious diseases. (byjus.com)
  • At higher doses, cerium clearance was impaired, suggesting lung overload. (biomedcentral.com)