Cerium: 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.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.Isotopes: Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)Cerium Radioisotopes: 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.Isotope Labeling: 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.Metal Nanoparticles: 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.Metals, Rare Earth: 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.Nitrogen Isotopes: Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic weight. N-15 is a stable nitrogen isotope.Oxygen Isotopes: Stable oxygen atoms that have the same atomic number as the element oxygen, but differ in atomic weight. O-17 and 18 are stable oxygen isotopes.Carbon Isotopes: Stable carbon atoms that have the same atomic number as the element carbon, but differ in atomic weight. C-13 is a stable carbon isotope.Textbooks as Topic: Books used in the study of a subject that contain a systematic presentation of the principles and vocabulary of a subject.Mass Spectrometry: An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.Molecular Sequence Data: 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.Amino Acid Sequence: 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.Femoral NeoplasmsSpectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization: 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.Crk-Associated Substrate Protein: 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.Waiting Lists: Prospective patient listings for appointments or treatments.CRISPR-Associated Proteins: 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.Cellular Apoptosis Susceptibility Protein: 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.Retinoblastoma-Like Protein p130: 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.Databases, Factual: 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.Internet: 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.Animal Husbandry: The science of breeding, feeding and care of domestic animals; includes housing and nutrition.Burial: The act or ceremony of putting a corpse into the ground or a vault, or into the sea; or the inurnment of CREMAINS.Textile Industry: The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed)Wit and Humor as Topic: 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)Facial Neuralgia: 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.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Striga: A plant genus of the family Orobanchaceae that is parasitic on the roots of other plants. Members contain the flavones, APIGENIN and LUTEOLIN.Cyprinidae: A family of freshwater fish comprising the minnows or CARPS.Tooth: One of a set of bone-like structures in the mouth used for biting and chewing.Carps: 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.Fishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Gills: 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.Plankton: 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.Nitracrine: Acridine antineoplastic agent used in mammary and ovarian tumors. It inhibits RNA synthesis.Beta Particles: High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.Strontium Radioisotopes: Unstable isotopes of strontium that decay or disintegrate spontaneously emitting radiation. Sr 80-83, 85, and 89-95 are radioactive strontium isotopes.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.Radioisotopes: 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)Radiation Dosage: 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).Radiometry: The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.Receptor, Cannabinoid, CB1: A subclass of cannabinoid receptor found primarily on central and peripheral NEURONS where it may play a role modulating NEUROTRANSMITTER release.Oceanography: The science that deals with the ocean and its phenomena. (Webster, 3d ed)Cupressaceae: A plant family of the order Pinales, class Pinopsida, division Coniferophyta (conifers). They are mainly resinous, aromatic evergreen trees.Eriogonum: A plant genus of the family POLYGONACEAE.VietnamPteridium: A plant genus of the family DENNSTAEDTIACEAE. Members contain ptaquiloside, braxin A1, and braxin B. The name is similar to brake fern (PTERIS).Doppler Effect: Changes in the observed frequency of waves (as sound, light, or radio waves) due to the relative motion of source and observer. The effect was named for the 19th century Austrian physicist Johann Christian Doppler.Adosterol: A sterol usually substituted with radioactive iodine. It is an adrenal cortex scanning agent with demonstrated high adrenal concentration and superior adrenal imaging.

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
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.
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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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 ...
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 lighter than the stable lutetium-175 decay via electron capture (to produce isotopes of ytterbium), with some alpha ... The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. ... All of the remaining radioactive isotopes have half-lives that are less than 9 days, and the majority of these have half-lives ... 2 Lu + 3 H2SO4 → 2 Lu3+ + 3 SO2- 4 + 3 H2↑ Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and lutetium-176 ...
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. ...
Cerium-144 and Zirconium-95 (both relatively short lived isotopes with a half life of 285 and 64 days respectively) made up 91 ...
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 ...
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 ...
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 ...
Cerium-136 (2E) Cerium-138 (2E) Cerium-140 (SF) Cerium-142 (A, 2B) Praseodymium-141 (SF) Neodymium-142 (SF) Neodymium-143 (A) ... Stable isotopes: 1 element (tin) has 10 stable isotopes 1 element (xenon) has 8 stable isotopes 4 elements have 7 stable ... Stable Isotope fractionation calculator National Isotope Development Center Reference information on isotopes, and coordination ... Isotope geochemistry List of elements by stability of isotopes List of nuclides (901 nuclides in order of stability, all with ...
Periodic Table with isotope decay chain displays. Click on element, then isotope mass number to see decay chain (link to ... A great deal of the lighter lanthanides (lanthanum, cerium, neodymium, and samarium) are formed as fission products. It is ... The only stable isotope of niobium has mass number 93, and fission products of mass 93 become relatively stable zirconium-93 ( ... 127I is stable, the only one of the isotopes of iodine that is nonradioactive. It makes up only about 1⁄6 of the iodine in ...
He became one of the first low-temperature geochemists to appreciate how radiogenic isotopes might be used to solve the ... the separation of cerium from other rare earth elements in a classic example of redox behaviour; he has developed a precise ... Palmer, M. R.; Elderfield, H. (1985). "Sr isotope composition of sea water over the past 75 Myr". Nature. 314 (6011): 526-528. ... He made his name in ocean chemistry and palaeochemistry, using trace metals and isotopes in biogenic carbonate as ...
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" ...
The primary decay products before 141Pr are element 58 (cerium) isotopes and the primary products after are element 60 ( ... Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes, bold italics for nearly-stable isotopes ( ... Registration required (help)). Isotope masses from: G. Audi; A. H. Wapstra; C. Thibault; J. Blachot; O. Bersillon (2003). "The ... All of the remaining radioactive isotopes have half-lives that are less than 5.985 hours and the majority of these have half- ...
The isotopes of cerium range in atomic weight from 119 u (119Ce) to 157 u (157Ce). Abbreviations: EC: Electron capture IT: ... Naturally occurring cerium (58Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce, with 140Ce being the most ... Registration required (help)). Isotope masses from: G. Audi; A. H. Wapstra; C. Thibault; J. Blachot; O. Bersillon (2003). "The ... All of the remaining radioactive isotopes have half-lives that are less than 4 days and the majority of these have half-lives ...
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 253/80 = 3.1625 isotopes ... Halbwertszeiten aller Isotope Exploring the Table of the Isotopes at the LBNL Current isotope research and information isotope. ...
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 ...
The primary decay mode of isotopes lighter than 141Pr is inverse beta decay or electron capture to isotopes of cerium, while ... Isotopes[edit]. Main article: Isotopes of praseodymium. Praseodymium has only one stable and naturally occurring isotope, 141Pr ... Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... This isotope has 82 neutrons, a magic number that confers additional stability.[11] This isotope is produced in stars through ...
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 ...
In those days, the first separation was into two main groups, the cerium-group earths (scandium, lanthanum, cerium, ... including all their isotopes.[citation needed] However, due to the radioactivity of many of these isotopes, it is unlikely that ... whereas the monoclinic monazite phase incorporates cerium and the cerium earths preferentially. The smaller size of the yttrium ... The longest-lived isotope of promethium has a half-life of 17.7 years, so the element exists in nature in only negligible ...
Another major use in the past was in gas mantle of lanterns, which are composed of 99 percent ThO2 and 1% cerium(IV) oxide. ... it must be used as a nuclear reactor fuel in conjunction with fissile isotopes of either uranium or plutonium. This can be ... This is uncommon among binary dioxides (other examples include cerium dioxide, hafnium dioxide, uranium dioxide and plutonium ... but is being phased out in favor of non-radioactive elements such as cerium, lanthanum and zirconium. Thoria dispersed nickel ...
1] Busby, J.T. "Challenges for Reactor Materials." Oak Ridge National Laboratory - Fuel Cycle and Isotopes Division. U.S. ... cerium, and lanthanum. Other additions such as reactive or refractory metals, can improve the mechanical properties of the ...
The isotope 248Bk was first obtained in 1956 by bombarding a mixture of curium isotopes with 25 MeV α-particles. Although its ... but contains cerium). Berkelium and cerium are then separated with another round of ion-exchange treatment. In order to ... About twenty isotopes and six nuclear isomers (excited states of an isotope) of berkelium have been characterized with the mass ... The production of the second-most important isotope 247Bk involves the irradiation of the rare isotope 244Cm with high-energy ...
Main article: Isotopes of cerium iso NA half-life DM DE (MeV) DP ... Ang ceryo (Iningles cerium) mao ang elementong kimiko sa ...
Because cerium is so reactive, the remelting was done in a vacuum, using a calcium oxide or magnesium oxide crucible. The first ... who had considerable experience with isotopes and radioactive elements. McCoy recommended Frank Spedding from Iowa State ... In mid-1944, the Ames Project was asked to produce cerium. This was being used by the laboratories at Berkeley and Los Alamos ... Again, the bomb method was used, this time to reduce anhydrous cerium chloride with calcium using an iodine booster. A special ...
Cerium. Praseodymium. Neodymium. Promethium. Samarium. Europium. Gadolinium. Terbium. Dysprosium. Holmium. Erbium. Thulium. ... including all their isotopes.[citation needed] However, due to the radioactivity of many of these isotopes, it is unlikely that ... In those days, the first separation was into two main groups, the cerium-group earths (scandium, lanthanum, cerium, ... whereas the monoclinic monazite phase incorporates cerium and the cerium earths preferentially. The smaller size of the yttrium ...
They were tested to see how Ba/La (barium and lanthanum) and Ba/Nb (barium and niobium) isotopes trended when plotted against ... The banded iron formations found contain rare-earth elements and positive europium and or negative cerium anomalies. This ... "Hafnium isotope evidence for a transition in the dynamics of continental growth 3.2 Gyr ago". Nature. 485 (7400): 627-630. doi: ...
Cerium activated lanthanum bromide is the recent inorganic scintillator which has a combination of high light yield and the ... Isotope identification utilizes several techniques (known as algorithms) which rely on the detector's ability to discriminate ... The improvements in resolution allow more accurate peak discrimination in ranges where isotopes often have many overlapping ... Recent advances in scintillator material have resulted in the development of cerium activated lanthanum bromide (LaBr3) ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Flerov, G. N. (1967). "On the nuclear properties of the isotopes 256103 and 257103". Nucl. Phys. A. 106 (2): 476. Bibcode: ... Cette raison a engagé M. Mosander à donner au nouveau métal le nom de Lantane." (The oxide of cerium, extracted from cerite by ... Some Elements Isolated with the Aid of Potassium and Sodium:Zirconium, Titanium, Cerium and Thorium". The Journal of Chemical ...
The isotopes of cerium range in atomic weight from 119 u (119Ce) to 157 u (157Ce). Abbreviations: EC: Electron capture IT: ... Naturally occurring cerium (58Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce, with 140Ce being the most ... Registration required (help)). Isotope masses from: G. Audi; A. H. Wapstra; C. Thibault; J. Blachot; O. Bersillon (2003). "The ... 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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
Substances used include chromium oxide (Cr2O3) and radio-isotopes such as cerium-141. A variety of inert materials have been ...
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; ...
... 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. ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... Sensitivity of the Phosphate-Cadmium-Carbon Isotope Relation in the Ocean to Cadmium Removal by Suboxic Sediments ... Distinguishing between water column and sedimentary denitrification in the Santa Barbara Basin using the stable isotopes of ... An ecologic explanation for the Permo-Triassic carbon and sulfur isotope shifts ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... A case for a comet impact trigger for the Paleocene/Eocene thermal maximum and carbon isotope excursion ... Exchange of Neodymium and Its Isotopes between Seawater and Small and Large Particles in the Sargasso Sea ... Exploring the kappa conundrum: the role of recycling in the lead isotope evolution of the mantle ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... Hf isotopes as the key for distinguishing slab melting in arcs: The case of the Mexican Volcanic Belt ... Isotope Geochemistry of Gakkel Ridge basalts and origin of a DUPAL signature ... Isotope Evidence of a Mantle Convection Boundary at the Australian-Antarctic Discordance ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... Sr-Nd-Pb isotope ratios, geochemical compositions, and Ar-40/Ar-39 data of lavas from San Felix Island (Southeast Pacific): ... A Pan-African Origin and Uplift for the Gneisses and Peridotites of Zabargad-Island, Red-Sea - a Nd, Sr, Pb, and Os Isotope ... Pathways and mean residence times of dissolved pollutants in the ocean derived from transient tracers and stable isotopes ...
Cerium Lead and Lead-Isotope Ratios in Arc Magmas and the Enrichment of Lead in the Continents ... A Pan-African Origin and Uplift for the Gneisses and Peridotites of Zabargad-Island, Red-Sea - a Nd, Sr, Pb, and Os Isotope ... Early Cenozoic benthic foraminiferal isotopes: Species reliability and interspecies correction factors Katz, M. E.; Katz, D. R ... A case for a comet impact trigger for the Paleocene/Eocene thermal maximum and carbon isotope excursion ...
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 ...
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 ...
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 ...
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 ...
Isotopes lighter than the stable lutetium-175 decay via electron capture (to produce isotopes of ytterbium), with some alpha ... The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. ... All of the remaining radioactive isotopes have half-lives that are less than 9 days, and the majority of these have half-lives ... 2 Lu + 3 H2SO4 → 2 Lu3+ + 3 SO2- 4 + 3 H2↑ Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and lutetium-176 ...
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 ...
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. ...
  • The term isotopes (originally also isotopic elements, now sometimes isotopic nuclides) is intended to imply comparison (like synonyms or isomers), for example: the nuclides 12 6C , 13 6C , 14 6C are isotopes (nuclides with the same atomic number but different mass numbers), but 40 18Ar , 40 19K , 40 20Ca are isobars (nuclides with the same mass number). (wikipedia.org)
  • 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)
  • Even in the case of the lightest elements where the ratio of neutron number to atomic number varies the most between isotopes it usually has only a small effect, although it does matter in some circumstances (for hydrogen, the lightest element, the isotope effect is large enough to strongly affect biology). (wikipedia.org)
  • 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)
  • Radioactive isotopes are produced when very small particles are fired at atoms. (encyclopedia.com)
  • The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, whereas the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear. (wikipedia.org)
  • These isotopes are produced when very small particles are fired at atoms. (encyclopedia.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)
  • As with atoms, the particular energy levels of nuclei are characteristic of each species, so that the photon energies of the gamma rays emitted, which correspond to the energy differences of the nuclei, can be used to identify particular elements and isotopes. (wikipedia.org)
  • List of companies who manufacture commercial off-the-shelf Radiation Isotope Identifiers for Homeland Security: Canberra Industries, ORTEC, Berkeley Nucleonics, spectra sample and spectroscopy example]) E. V. D. van Loef, P. Dorenbos, C. W. E. van Eijk, K. W. Kraemer and H. U. Guedel Appl. (wikipedia.org)
  • This is uncommon among binary dioxides (other examples include cerium dioxide, hafnium dioxide, uranium dioxide and plutonium dioxide). (wikipedia.org)
  • Most lanthanides can use only three electrons as valence electrons, as afterwards the remaining 4f electrons are too strongly bound: cerium is an exception because of the stability of the empty f-shell in Ce4+ and the fact that it comes very early in the lanthanide series, where the nuclear charge is still low enough until neodymium to allow the removal of the fourth valence electron. (wikipedia.org)
  • The result is the number of electrons in the isotope. (sciencing.com)
  • The berkelium-249 isotope emits low-energy electrons and thus is relatively safe to handle. (wikipedia.org)
  • 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)
  • An element, therefore, can have several variants, called isotopes, which differ slightly in the composition of the nucleus. (sciencing.com)
  • 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)
  • Despite always being found in combination with the other rare-earth elements in minerals such as monazite and bastnäsite, cerium is easy to extract from its ores, as it can be distinguished among the lanthanides by its unique ability to be oxidized to the +4 state. (wikipedia.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)
  • Europium is produced by nuclear fission, but the fission product yields of europium isotopes are low near the top of the mass range for fission products. (wikipedia.org)
  • Many investigations have been carried out to find the absolute age and properties of zircon, for example the isotope ratios, mineral inclusions, and geochemistry of zircon. (wikipedia.org)
  • 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)
  • 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)
  • Inductively coupled plasma mass spectrometry (ICP-MS) is a type of mass spectrometry which is capable of detecting metals and several non-metals at concentrations as low as one part in 1015 (part per quadrillion, ppq) on non-interfered low-background isotopes. (wikipedia.org)
  • In 1841, Swedish chemist Carl Gustav Mosander extracted a rare-earth oxide residue he called didymium from a residue he called "lanthana", in turn separated from cerium salts. (wikipedia.org)