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.
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.
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)
Unstable isotopes of zinc that decay or disintegrate emitting radiation. Zn atoms with atomic weights 60-63, 65, 69, 71, and 72 are radioactive zinc 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.
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.
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)
Unstable isotopes of strontium that decay or disintegrate spontaneously emitting radiation. Sr 80-83, 85, and 89-95 are radioactive strontium isotopes.
High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.
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.
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.
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.
Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)
The rate dynamics in chemical or physical systems.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
A carcinoma discovered by Dr. Margaret R. Lewis of the Wistar Institute in 1951. This tumor originated spontaneously as a carcinoma of the lung of a C57BL mouse. The tumor does not appear to be grossly hemorrhagic and the majority of the tumor tissue is a semifirm homogeneous mass. (From Cancer Chemother Rep 2 1972 Nov;(3)1:325) It is also called 3LL and LLC and is used as a transplantable malignancy.
Addition of hydrogen to a compound, especially to an unsaturated fat or fatty acid. (From Stedman, 26th ed)
Liquid, solid, or gaseous waste resulting from mining of radioactive ore, production of reactor fuel materials, reactor operation, processing of irradiated reactor fuels, and related operations, and from use of radioactive materials in research, industry, and medicine. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Disposal, processing, controlling, recycling, and reusing the solid, liquid, and gaseous wastes of plants, animals, humans, and other organisms. It includes control within a closed ecological system to maintain a habitable environment.
Science dealing with the properties, distribution, and circulation of water on and below the earth's surface, and atmosphere.
Facilities that convert NUCLEAR ENERGY into electrical energy.
Units that convert some other form of energy into electrical energy.
Pollutants, present in water or bodies of water, which exhibit radioactivity.
Metals with high specific gravity, typically larger than 5. They have complex spectra, form colored salts and double salts, have a low electrode potential, are mainly amphoteric, yield weak bases and weak acids, and are oxidizing or reducing agents (From Grant & Hackh's Chemical Dictionary, 5th ed)
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTE WATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies.
A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass the particulates. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Method of using a polycrystalline powder and Rietveld refinement (LEAST SQUARES ANALYSIS) of X-RAY DIFFRACTION or NEUTRON DIFFRACTION. It circumvents the difficulties of producing single large crystals.
Nanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic molecules. (Glossary of Biotechnology and Nanobiotechology Terms, 4th ed)
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
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.

Changes in myocardial blood flow and S-T segment elevation following coronary artery occlusion in dogs. (1/12)

The relationship between regional blood flow and epicardial S-T segment elevation was studied in 26 open-chest anesthetized dogs with left anterior coronary artery ligations. Changes in myocardial blood flow, measured with 15 plus or minus 5mu (diameter) microspheres labeled with 141-Ce, 85-Sr, and 169-Yb, were correlated with summated S-T segment elevations 15 minutes, 1 hour, and 2 hours after coronary artery occlusion. In normal areas, myocardial blood flow was 113 plus or minus 5 ml/min 100 g- minus 1 and summated S-T segment elevation was 0.3 plus or minus 0.2 mv. Fifteen minutes after coronary artery occlusion in 26 dogs, S-T segment elevation was 5.7 plus or minus 0.7 mv over the center of the infarct and myocardial blood flow was 10 plus or minus 1 ml/min 100 g- minus 1; over the border zone, myocardial blood flow was 63 plus or minus 4 ml/min 100 g- minus 1 and S-T segment elevation was 3.1 plus or minus 0.1 mv. One third of the areas with a myocardial blood flow of 10 ml/min 100 g- minus 1 or less had no S-T segment elevation. In the center and border zones of the infarct in 9 dogs, myocardial blood flow increased from 11 plus or minus 2 and 67 plus or minus 8 ml/min 100 g- minus 1 15 minutes after occlusion to 20 plus or minus 4 and 84 plus or minus 12 ml/min 100 g- minus 1, respectively, 2 hours after coronary artery occlusion. These increases were not associated with a significant reduction in summated S-T segment elevation. The results do not suggest a simple quantitative relationship between epicardial S-T segment elevation and myocardial blood flow following acute coronary artery occlusion.  (+info)

Non-invasive quantification of liver perfusion with dynamic computed tomography and a dual-input one-compartmental model. (2/12)

Various liver diseases lead to significant alterations of the hepatic microcirculation. Therefore, quantification of hepatic perfusion has the potential to improve the assessment and management of liver diseases. Most methods used to quantify liver perfusion are invasive or controversial. This paper describes and validates a non-invasive method for the quantification of liver perfusion using computed tomography (CT). Dynamic single-section CT of the liver was performed after intravenous bolus administration of a low-molecular-mass iodinated contrast agent. Hepatic, aortic and portal-venous time-density curves were fitted with a dual-input one-compartmental model to calculate liver perfusion. Validation studies consisted of simultaneous measurements of hepatic perfusion with CT and with radiolabelled microspheres in rabbits at rest and after adenosine infusion. The feasibility and reproducibility of the CT method in humans was assessed by three observers in 10 patients without liver disease. In rabbits, significant correlations were observed between perfusion measurements obtained with CT and with microspheres (r=0.92 for total liver perfusion, r=0.81 for arterial perfusion and r=0.85 for portal perfusion). In patients, total liver plasma perfusion measured with CT was 112+/-28 ml.min(-1).100 ml(-1), arterial plasma perfusion was 18+/-12 ml.min(-1).100 ml(-1) and portal plasma perfusion was 93+/-31 ml.min(-1).100 ml(-1). The measurements obtained by the three observers were not significantly different from each other (P>0.1). Our results indicate that dynamic CT combined with a dual-input one-compartmental model provides a valid and reliable method for the non-invasive quantification of perfusion in the normal liver.  (+info)

Lung albumin accumulation is spatially heterogeneous but not correlated with regional pulmonary perfusion. (3/12)

The contribution of pulmonary perfusion heterogeneity to the development of regional differences in lung injury and edema is unknown. To test whether regional differences in pulmonary perfusion are associated with regional differences in microvascular function during lung injury, pigs were mechanically ventilated in the prone position and infused with endotoxin (Escherichia coli 055:B5, 0.15 microg. kg(-1). h(-1); n = 8) or saline (n = 4) for 4 h. Extravascular albumin accumulation and perfusion were measured in multiple approximately 0.7-ml lung regions by injecting pigs with radiolabeled albumin and radioactive microspheres, respectively. Extravascular albumin accumulation was spatially heterogeneous but not correlated with regional perfusion. Extravascular albumin accumulation was greater in dorsal than ventral regions, and regions with similar albumin accumulation were spatially clustered. This spatial organization was less evident in endotoxemic than control pigs. We conclude that there are regional differences in lung albumin accumulation that are spatially organized but not mediated by regional differences in pulmonary perfusion. We speculate that regional differences in microvascular pressure or endothelial function may account for the observed distribution of extravascular albumin accumulation.  (+info)

Pulmonary neoplasms in rats that inhaled cerium-144 dioxide. (4/12)

The lung neoplasms induced in rats by inhaled, internally deposited 144CeO2 were described and classified using histologic criteria. F344 rats were exposed once or repeatedly by inhalation to 144CeO2 and observed for their life span. There was significant life shortening only in those rats with the highest radiation doses. In these rats, there was a high percentage of squamous cell carcinomas of the lung, as well as much lower percentages of adenocarcinomas of the lung, hemangiosarcomas of the lung, and pleural mesotheliomas. At lower doses, adenocarcinomas were the most predominant tumor. These adenocarcinomas were subdivided based on their histologic pattern: alveolar, papillary, tubular, or undifferentiated. Neither the mode of exposure (single or repeated) nor the sex of the rat influenced the lung tumor incidence or tumor type. The lung neoplasms induced by this beta-emitting radionuclide are similar in nature to those induced by alpha-emitting radionuclides deposited in the lung in rats. However, the radiation-induced squamous cell carcinomas of the lung differ from those induced by heavy particle loads of nonradioactive compounds. The radiation-induced squamous cell carcinomas occur in higher incidence and have a more malignant behavior than those induced by heavy particle loads.  (+info)

Revascularisation of bone grafts in rats. (5/12)

Revascularisation of syngeneic and allogeneic intramuscular bone grafts have been studied using radioactive microspheres to measure the ingrowth of blood vessels. New bone formation and resorption were measured by 85strontium uptake and by graft weight reduction. Revascularisation, and mineralisation rate were significantly higher in syngeneic grafts than in allogeneic grafts at two, three and six weeks after implantation. The syngeneic grafts lost weight faster indicating that the allogeneic grafts resorbed more slowly. The ingrowth of new vessels is impaired in allogeneic bone, and this probably inhibits the rate of bone formation and resorption of the grafts.  (+info)

Distribution and Translocation of 141Ce (III) in Horseradish. (6/12)

BACKGROUND AND AIMS: Rare earth elements (REEs) are used in agriculture and a large amount of them contaminate the environment and enter foods. The distribution and translocation of (141)Ce (III) in horseradish was investigated in order to help understand the biochemical behaviour and toxic mechanism of REEs in plants. METHODS: The distribution and translocation of (141)Ce (III) in horseradish were investigated using autoradiography, liquid scintillation counting (LSC) and electron microscopic autoradiography (EMARG) techniques. The contents of (141)Ce (III) and nutrient elements were analysed using an inductively coupled plasma-atomic emission spectrometer (ICP-AES). RESULTS: The results from autoradiography and LSC indicated that (141)Ce (III) could be absorbed by horseradish and transferred from the leaf to the leaf-stalk and then to the root. The content of (141)Ce (III) in different parts of horseradish was as follows: root > leaf-stalk > leaf. The uptake rates of (141)Ce (III) in horseradish changed with the different organs and time. The content of (141)Ce (III) in developing leaves was greater than that in mature leaves. The results from EMARG indicated that (141)Ce (III) could penetrate through the cell membrane and enter the mesophyll cells, being present in both extra- and intra-cellular deposits. The contents of macronutrients in horseradish were decreased by (141)Ce (III) treatment. CONCLUSIONS: (141)Ce (III) can be absorbed and transferred between organs of horseradish with time, and the distribution was found to be different at different growth stages. (141)Ce (III) can enter the mesophyll cells via apoplast and symplast channels or via plasmodesmata. (141)Ce (III) can disturb the metabolism of macronutrients in horseradish.  (+info)

Intestinal circulation during inhalation anesthesia. (7/12)

This study was designed to evaluate the influence of inhalational agents on the intestinal circulation in an isolated loop preparation. Sixty dogs were studied, using three intestinal segments from each dog. Selected intestinal segments were pumped with aortic blood at a constant pressure of 100 mmHg. A mixture of 86Rb and 9-microns spheres labeled with 141Ce was injected into the arterial cannula supplying the intestinal loop, while mesenteric venous blood was collected for activity counting. A very strong and significant correlation was found between rubidium clearance and microsphere entrapment (r = 0.97, P less than 0.0001), suggesting that the shunting of 9-microns spheres through the intestines reflects the arteriovenous shunting of blood. Nitrous oxide anesthesia was accompanied by a higher vascular resistance (VR), lower flow (F), rubidium clearance (Cl-Rb), and microspheres entrapment (Cl-Sph) than pentobarbital anesthesia, indicating that the vascular bed in the intestinal segment was constricted and flow (total and nutritive) decreased. Halothane, enflurane, and isoflurane anesthesia were accompanied by a much lower arteriovenous oxygen content difference (AVDO2) and oxygen uptake than pentobarbital or nitrous oxide. Compared with pentobarbital, enflurane anesthesia was not accompanied by marked differences in VR, F, Cl-Rb, and Cl-Sph; halothane at 2 MAC decreased VR and increased F and Cl-Rb while isoflurane increased VR and decreased F. alpha-Adrenoceptor blockade with phentolamine (1 mg . kg-1) abolished isoflurane-induced vasoconstriction, suggesting that the increase in VR was mediated via circulating catecholamines.(ABSTRACT TRUNCATED AT 250 WORDS)  (+info)

Total cerebral ischemia: a new model system for the study of post-cardiac arrest brain damage. (8/12)

The pathophysiology of post-cardiac arrest brain damage is not well understood. Many of the model systems presently used to study global ischemia have serious limitations. A new model system for total cerebral ischemia (TCI), using aortic and inferior vena caval occlusion balloons, is described. This model system produces verifiable TCI and avoids surgical invasion of the thorax or the use of vasoactive drugs. It does not impede cerebral venous return and protects the cardiopulmonary system from damage. This model system can be used to study the efficacy of various therapeutic interventions following a standardized CNS global ischemic insult.  (+info)

TY - JOUR. T1 - Reduction of S-T segment elevation with infusion of nitroprusside in patients with acute myocardial infarction. AU - Awan, Najam A.. AU - Miller, Richard R.. AU - Vera, Zakauddin. AU - DeMaria, Anthony N.. AU - Amsterdam, Ezra A. AU - Mason, Dean T.. PY - 1976. Y1 - 1976. N2 - The effect of infusion of sodium nitroprusside on S-T segment elevation was evaluated in 12 patlents with acute anterior myocardial infarction. Precordial 35 lead S-T segment maps were obtained in each patient immediately before and 10 minutes after infusion of 53 μ/min (range 20 to 100 μg/min) of nitroprusside. The following measurements were made from each S-T map: ∑ST (total S-T elevation in all leads), NST (number of leads with S-T elevation greater than 1 mm) and ST (average S-T elevation in leads with more than 1 mm elevation). After administration of nitroprusside, evidence of myocardial ischemic injury as assessed by S-T mapping decreased in association with reduction of the myocardial oxygen ...
TY - JOUR. T1 - Microsphere passage through intestinal circulation. T2 - via shunts or capillaries?. AU - Maxwell, L. C.. AU - Shepherd, A. P.. AU - McMahan, C. A.. PY - 1985/2. Y1 - 1985/2. N2 - Significant quantities of 9-micron microspheres (20-30%) are not trapped in the intestine following intracardiac or intra-arterial injection, but reach venous blood. Some investigators propose that the passage of 9-micron spheres measures blood flow through noncapillary connections. Because frequency distributions of intestinal capillary diameters and 9-micron spheres overlap, microspheres could simply pass through capillaries. Therefore, we developed simple probabilistic models to predict both the size distribution and the percentage of injected spheres [9 +/- 1 (SD) micron] that should appear in venous blood. Chief assumptions in models are that microsphere delivery and sphere diameter are independent and that microspheres pass through capillaries of equal or larger size. The passage predicted by the ...
Canine left ventricular wall metabolites (ATP, creatine phosphate, glycogen, glucose, glucose-6-phosphate, and lactate) were assessed in the ischemic region of the wall after 17 minutes of ligation of the left anterior descending coronary artery at its midlevel. Variations in the degree of lactate accumulation were found between different sites in the same ischemic region and between the outer and the inner left ventricular wall at the same site. High levels of lactate were associated with S-T segment elevation in the epicardial electrocardiogram, but no lactate accumulation or only mild lactate accumulation was found at isoelectric sites. Lactate accumulation at isoelectric sites was higher in the outer wall than it was in the inner wall; the opposite tendency was observed at sites of S-T segment elevation. In addition to high lactate levels, sites of S-T segment elevation demonstrated a more pronounced depletion of ATP and creatine phosphate, indicating not only a marked anaerobic glycolysis ...
dpG antibodies were fractionated on a cellulose-double-stranded DNA column. The flow-through fraction bound denatured DNA but not double-stranded DNA (dsDNA). The dpG-eluted fraction bound dsDNA preferentially. The results show that proteins can recognise dpG in DNA by different mechanisms, some involving DNA unwinding.. ...
Diffusion-weighted noble gas pulmonary magnetic resonance imaging (MRI) provides in vivo images with a contrast uniquely sensitive to molecular displacement at cellular and sub-cellular length scales. We estimated the external airway radius (R) and internal airway radius (r) of the alveolar dimensions to evaluate potential differences in acinar duct morphometries in healthy older never-smokers and compared those with a group of ex-smokers. The acinar duct and alveolar MRI morphometry results were within the physiologically-valid range of parameters. Estimated values of internal (r) and external (R) airway radius as well as alveolar sheath (h) and mean linear intercept (Lm) for individual subjects were similar with low variance. Results showed that MRI measurements of lung air space size in healthy older never-smokers were elevated compared to previous results reported in younger never-smokers, and lower than in age-matched ex-smokers (p|.05). Specifically, older never-smokers had significantly lower
EN] We applied the model of temporary total cerebral ischemia in adult monkeys (macaques) by means of reversible interruption of cerebral blood flow. De novo generated cells in ischemic or control subjects were labeled with bromodeoxyuridine (BrdU), an indicator of DNA synthesis. Subsequently, we investigated the distribution and phenotype of cells stained for BrdU in several regions of the cerebrum, at various intervals after ischemia. Ischemia lead to a significant increase in the quantities of de novo generated cells in the hippocampus, the subventricular zone, neocortex and striatum, but with no similar effect on the parahippocampal region. In the olfactory bulb, ischemia did not result in a change in the level of proliferation in the first two post ischemic weeks, but an increase was observed at longer intervals. The majority of new cells outside the germinal centers in the hippocampus and subventricular zone were with glial phenotype, while neurons comprised no more than 1 percent of these ...
Lymphatic blood regulator, hematopoesis, prothrombin, hemophilia, ductus thoracicus, connection: intestinal circulation, vascular tonus, lymph tracts, sexual organs, lymph & white blood count, lymphatic build-up & defensive mechanisms.. [toothbooks]. ...
Lymphatic blood regulators, hematopoesis, prothrombin, hemophilia, ductus thoracicus, connection: intestinal circulation, vascular tonus, lymph tracts, sexual organs, lymph & white blood count, lymphatic build-up & defensive mechanisms.. [toothbooks]. ...
Provided that maintains the intestinal circulation results can you mix suboxone and ultram in this type 2 75 5976. Glitazones lower to patients can be considered when it synthesize new cOX The main effect. The object of the uK showed that widespread resistance does not reversible pathology. About 95% or antihistamines and about a number of 24-40 h. 4 399 previously useful for thrombosis, with central importance of dose of mild analgesic what does propranolol do to the body combinations. Increased parasympa- thetic tone and how to induce hepatic cYP450 showed that many gram-negative. Glitazones bind to its effect, lH following cellular functions of the critical life-saving at risk factor. In addition, emtricitabine and circulatory collapse, urinary tract. However, iodide nor- mal ventricular dysfunction, so ventricular ejection fraction of pancreatitis, human forearm vasculature. The active as the acute renal tubular reabsorption from acetate is deficient diet. Ocular irritation, 25 2073 showed ...
Research. With this project we seek to develop a tool for non-invasive quantification of the α7 subtype of nicotinic acetylcholine receptors (α7 nAChR) expressed in brain to better understand the involvement of this ligand-gated Ca2+ channel in the biology of brain cancers. Based on ex vivo data, a close connection between changes in the density and functionality of α7 nAChR with various neurological disorders and most types of cancer has been assumed. But the visualization of these alterations in vivo by clinically relevant imaging technologies such as PET is still challenging due to limitations in receptor-binding radiotracers.. Accordingly, we are working on the design, synthesis, radiolabeling, and preclinical evaluation of 18F-labelled α7 nAChR PET radiotracers. In the past years, we have learned a great deal on the suitability of small molecules substituted with a 1,4-diazabicyclo-[3.2.2]nonane, such as [18F]DBT-10 or [18F]NS10743, for detection of α7 nAChR expressed in brain of ...
TY - JOUR. T1 - Model of a thalamocortical neurone with dendritic voltage-gated ion channels. AU - Antal, Károly. AU - Emri, Zsuzsa. AU - Tóth, Tibor I.. AU - Crunelli, Vincenzo. PY - 1996/1/1. Y1 - 1996/1/1. N2 - To investigate the functional role of dendrites of thalamocortical neurones, we have used our one-compartmental model to construct a multi-compartmental model with dendritic regions chosen according to a representative soma-to-dendritic terminal path of an X cell of the cat dorsal lateral geniculate nucleus. The multi-compartmental model with dendritic low-threshold Ca2+ and delayed rectifier K+ channels yields more accurate results than the one-compartmental model when simulating tonic firing and oscillatory activities, and provides a useful means for the study of propagation of excitation on the dendrites.. AB - To investigate the functional role of dendrites of thalamocortical neurones, we have used our one-compartmental model to construct a multi-compartmental model with ...
An apparatus for measuring the concentration of selected solute in a solution. This apparatus is particulary suitable for measuring the concentration of blood components, such as blood late Maillard products. A beam of exposing light is imaged through a wall of a containment vessel onto a region of the sample adjacent to this wall to induce from said selected solute emission of light that includes at least one emission peak that can be used to calculate the concentration of this solute. At least one detector is positioned to maximize the strength of detected signal, if other components of this solution strongly absorb the emitted light. The exposing light is directed such that the detected signal is maximized as a function of the path of this exposing light. A particular embodiment is a low-cost, non-invasive blood Maillard products concentration detector. In this embodiment, the containment vessel is preferably one of the patients fingers. At least two additional detected signals are monitored and
...PHILADELPHIA - By comparing two species of ants Shelley Berger PhD ...Ants the new model system used in this study organize themselves int...Berger who directs Penns Epigenetics program and colleagues believe...In a study published in Science this week Berger her Penn col...,Genome,comparison,of,ants,establishes,new,model,species,for,molecular,research,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Based on the methods of (Daum et al., 1982) and (Hewitt et al., 2012), we have established the use of Candida albicans as a new model system to study mitochondrial biogenesis. This dimorphic yeast provides an excellent system to investigate the coordination of mitochondrial biogenesis with other cellular networks including cellular metabolism and the cell cycle. Unlike the model lab yeast Saccharomyces cerevisiae, which has been widely used in the mitochondrial biogenesis field, C. albicans is not subject to the Crabtree effect, hence grows aerobically in glucose when oxygen is present. Therefore the control of mitochondrial biogenesis in C. albicans is more typical of eukaryotic cells. C. albicans has a fully sequenced genome and there are many published tools for genetic manipulation facilitating Systems Biology approaches. The isolation of mitochondria as described in this protocol produces a more simplified system that can be interrogated using the standard tools of molecular biology. In addition
Pancreatic islet cell mass (PICM) is a major determinant of the insulin secretory capacity in humans. Currently, the only method for accurate assessment of the PICM is an autopsy study. Thus, development of a technique allowing the non-invasive quantification of PICM is of great interest. The aim of …
Currently, there are limited methods available for longitudinal and non-invasive in vivo assessment of the transport kinetics of carrier-based therapeutics, such as those relying on liposomes. A viable strategy to non-invasively track the carrier in vivo is to employ the same carrier loaded with contrast-enhancing agents such as iodine and gadolinium. If these agents are retained within the carrier, they may act as surrogates for therapeutic molecules and allow for non-invasive tracking of the carrier in vivo using computed tomography (CT) and magnetic resonance (MR) imaging devices. If a correlation can be found between the change in signal intensities measured with CT and/or MR and the actual agent concentration detected in vivo, then this method has the potential to be successfully adopted for non-invasive quantification of pharmacokinetics and biodistribution studies. In this way, not only can the same animal be sampled over multiple time points, avoiding animal-to-animal variations, but the total
Chiara Bardella, Osama Al-Dalahmah, Daniel Krell, Pijus Brazauskas, Khalid Al-Qahtani, Marketa Tomkova, Julie Adam, Sébastien Serres, Helen Lockstone, Luke Freeman-Mills, Inga Pfeffer, Nicola Sibson, Robert Goldin, Benjamin Schuster-Böeckler, Patrick J. Pollard, Tomoyoshi Soga, James S. McCullagh, Christopher J. Schofield, Paul Mulholland, Olaf Ansorge, Skirmantas Kriaucionis, Peter J. Ratcliffe, Francis G. Szele, Ian Tomlinson. Expression of Idh1R132H in the Murine Subventricular Zone Stem Cell Niche Recapitulates Features of Early Gliomagenesis. Cell, 2016, Volume 30, Issue 4, p578-594.. Emir U, Larkin S, de Pennington N, Voets N, Plaha P, Stacey R, Al-Qahtani K, Mccullagh J, Schofield C, Clare S, Jezzard P, Cadoux-Hudson T & Ansorge O. Non-invasive quantification of 2-hydroxyglutarate in human gliomas with IDH1 and IDH2 mutations. Cancer Research 2016, 1;76)1):43-9.. Uche FI, Drijfhout FP, McCullagh J, Richardson A, Li WW. Cytotoxicity Effects and Apoptosis Induction by ...
... METTLER TOLEDO announced attendance at the Partec/Powtech/WCPT6 on ...(PRWEB) April 15 2010 -- METTLER TOLEDO recently announced its partic...,Track,Particle,Distribution,in,Real,Time,,biological,advanced biology technology,biology laboratory technology,biology device technology,latest biology technology
Plasma Physics Reports -- February 2005 Volume 31, Issue 2, pp. 93-183 TOKAMAKS Toroidal Alfvén Eigenmodes in a Tokamak with a Population of High-Energy Large-Orbit Ions A. B. Mikhailovskii, E. A. Kovalishen, M. S. Shirokov, and S. V. Konovalov pp. 93-103 Full Text: PDF (132 kB) Behavior of the Fast Neutrals Generated during a Disruption in the T-11M Tokamak A. M. Belov, A. I. Markin, A. G. Alekseev, and S. V. Mirnov pp. 104-109 Full Text: PDF (143 kB) MAGNETIC CONFINEMENT SYSTEMS MHD Stabilization by the Magnetic Hill at a Small Rotational Transform A. A. Skovoroda pp. 110-122 Full Text: PDF (160 kB) PLASMA KINETICS Quantum Corrections to the Particle Distribution Function and Reaction Rates in Dense Media A. N. Starostin, A. G. Leonov, Yu. V. Petrushevich, and Vl. K. Rerikh pp. 123-132 Full Text: PDF (125 kB) DUSTY PLASMA Self-Consistent Quasineutral Dust Structures V. N. Tsytovich pp. 133-146 Full Text: PDF (132 kB) PLASMA OSCILLATIONS AND WAVES Theory of Slow Waves in Transversely ...
Marie-Odile is the former President of France Alzheimer, a position she held from 2010 to 2015. Previously, she served as Vice President (2008) and Administrator (2006).. She is also the former carer of her mother, who lived with Alzheimers disease. During that time, Marie-Odile created an association of family caregivers of people with Alzheimers disease in Aix-en-Provence. She joined France Alzheimers Bouches-du-Rhône chapter in 2003 and has been the chapter President since 2004.. Marie-Odile was elected to the Alzheimer Europe Board in October 2014.. Association France Alzheimer ...
For many tumours there is a lack of randomised data from which we can guide systemic treatments. Although gene expression profiling along with proteomics has led to advances in diagnosis, classification and prognosis, our ability to target many cancers has been further limited due to a lack of therapeutic options. The use of patient-derived xenograft (PDX) models in the setting of a rare malignancy is discussed here by Kamili et al, with the successful establishment of new model systems.
There are four active projects in my lab, all devoted to taking advantage of the ecological and behavioral diversity of the microbial world. One is studying interactions between gut microbes and their hosts, using a new model system, planaria (flatworms) as the experimental animals. The second is a bioremediation project, isolating bacteria which catabolize gasoline as their source of carbon and energy, and using those bacteria alone or in combination to render gasoline contaminated soil safe for normal use. The third project uses bacteriophage (bacteria-specific viruses) as an antibacterial agent for the skin disease acne, targeting the bacterial species that causes serious acne lesions. The final project is working with bacteriophage specific for food-borne pathogens, developing kitchen-based protocols to decontaminate produce like lettuce or alfalfa sprouts which are not cooked before consuming. ...
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.
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.
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. ...
N-Nitrosodibutylamine and its θ-hydroxylated metabolite N-nitrosobutyl(4-hydroxybutyl)amine (NB4HBA) induce tumors in the urinary bladder of different animal species through their common urinary metabolite N-nitrosobutyl(3-carboxypropyl)amine (NB3CPA), resulting from the oxidation of the alcoholic group of NB4HBA to a carboxylic group.. NB4HBA disappearance from blood, the formation of its main metabolites, NB3CPA and NB4HBA-glucuronide (NB4HBA-G), and their urinary excretion, were investigated in rats after an i.v. dose of 1 mg/kg (5.7 µmol/kg).. NB3CPA and NB4HBA-G formation was readily detectable 2 min after treatment and levels were still measurable at 120 and 30 min, respectively. The parent compound disappeared from blood 90 min after injection. The NB4HBA blood concentration-time profile was adequately described by a one-compartmental linear model. NB4HBA half-life was 8 min, total body clearance and renal clearance were 86.1 and 0.22 ml/min/kg, respectively. The 0-96-h urinary ...
Shared from: RESEARCH What is the value of regional cerebral saturation in post-cardiac arrest patients? A prospective observational study The aim of this study was to elucidate the possible role of cerebral saturation monitoring in the post-cardiac arrest setting. This is well worth a read through... Critical Care 2016 20:327 Published on: 13 October 2016…
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TABLE-US-00012 TABLE 8 Corn ESD Analysis A Sonic 80% A Sonic 100% A Sonic 100% A Sonic 100% A Control Amp. & 420 Watts Amp. & 412 Watts Amp. & 490 Watts Amp. & 530 Watts ESD W/BP W/NO BP W/BP W/HBP Class F(n) F(n) % F(n) F(n) % F(n) F(n) % F(n) F(n) % F(n) F(n) % 0.00 0 0.00% 0 0.00% 0 0.00% 0 0.00% 0 0.00% 1.00 3 0.17% 6 0.37% 18 1.09% 3 0.18% 5 0.29% 2.00 32 1.80% 48 2.99% 66 4.01% 27 1.58% 48 2.76% 3.00 164 9.22% 307 19.13% 157 9.54% 194 11.33% 222 12.77% 4.00 214 12.03% 329 20.50% 220 13.37% 281 16.40% 241 13.87% 5.00 180 10.12% 217 13.52% 224 13.62% 268 15.65% 278 16.00% 6.00 178 10.01% 191 11.90% 227 13.80% 238 13.89% 228 13.12% 7.00 163 9.16% 111 6.92% 209 12.71% 162 9.46% 194 11.16% 8.00 134 7.53% 81 5.05% 132 8.02% 108 6.30% 126 7.25% 9.00 121 6.80% 66 4.11% 102 6.20% 68 3.97% 101 5.81% 10.00 111 6.24% 59 3.68% 58 3.53% 56 3.27% 74 4.26% 11.00 82 4.61% 34 2.12% 44 2.67% 47 2.74% 51 2.93% 12.00 58 3.26% 45 2.80% 30 1.82% 40 2.34% 38 2.19% 13.00 56 3.15% 31 1.93% 25 1.52% 39 2.28% 26 ...
Organocerium compounds are chemical compounds that contain one or more chemical bond between carbon and cerium. Organocerium chemistry is the corresponding science exploring properties, structure and reactivity of these compounds. In general, organocerium compounds are not isolable, and are rather studied in solution via their reactions with other species. There are notable exceptions, such as the Cp*3Ce(III) complex shown at right, but they are relatively rare. Complexes involving cerium of various oxidation states are known: though lanthanides are most stable in the +3 state, complexes of cerium(IV) have been reported. These latter compounds have found less widespread use due to their oxidizing nature, and the majority of literature regarding organometallic cerium complexes involves the +3 oxidation state. In particular, organocerium compounds have been developed extensively as non-basic carbon nucleophiles in organic synthesis. Because cerium is relatively non-toxic, they serve as an ...
A quasilinear analysis of the relativistic electron cyclotron maser instability is presented. A background plasma is assumed to support the wave motion, while the instability is driven by a tenuous population of energetic electrons possessing a loss-cone feature. The analysis makes use of an efBcient moment method. In this approach, evolution equations for the moments of particle distribution function are derived from the particle kinetic equation. Then, a self-similar model of the loss-cone electron distribution function is imposed. Simultaneously, the wave kinetic equation is solved. The resulting fully self-consistent set of equations that governs the evolution of the particles and unstable waves is solved numerically under physical parameters that represent typical solar microwave burst sources ...
Lignosulphonates are by‐products from the sulphite pulping process for the manufacture ofspecialty dissolving pulps and paper. During the liberation of the cellulose, the lignin isfractionated and solubilised through covalent addition of sulphonic acid groups at variouspositions in the structure. The formed sulphonated lignin, lignosulphonate is then furtherisolated and refined.. The amphiphilic nature of lignosulphonates has enabled them to be used as additives to varioussuspensions to improve their dispersion and stability. The by far largest utilisation oflignosulphonates is as dispersants in concrete. Here, lignosulphonates act by dispersing cementparticles to prevent flocculation, un‐even particle distribution and reduced strengthdevelopment. The dispersion is achieved through steric and electrostatic repulsion of the cementparticles by the lignosulphonate polymer. This behaviour is intimately linked with the overallsize and amount of charged groups in the dispersing polymer. ...
Cerium(IV) sulfate | Ce(SO4)2 or CeO8S2 | CID 159684 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Sudden Death: The abrupt cessation of all vital bodily functions, manifested by the permanent loss of total cerebral, respiratory, and cardiovascular functions.
Unicellular organisms such as ciliates are largely neglected in research on adaptive developmental plasticity, although their nuclear dualism offers ideal circumstances to study development outside an embryonic context. Here, we gain first insights into the ability of the ciliate Paramecium to develop potentially adaptive phenotypic changes in response to early-life adversity. We show that, upon exposure to unconventional culture temperatures, germ line-to-soma differentiation gives rise to coordinated molecular changes that may help attune the number of functional gene copies to the new external conditions. The non-random somatic heterogeneity that developmental plasticity generates is largely epigenetically controlled, shaped by the parental experience, and may prompt a stress response. These findings establish Paramecium as a new model system to study the molecular basis and evolutionary significance of developmental plasticity. In echoing previous indications in mammals, they call for an
2-Methoxyestradiol (2ME), an endogenous metabolite of 17β-estradiol, has been previously reported to possess antiangiogenic and antitumor properties. Herein, we demonstrate that the effects of this antiangiogenic steroid can be readily assayed in live zebrafish, introducing a convenient and robust new model system as a screening tool for both single cell and collective cell migration assays. Using the in vitro mammalian endothelial cell line EA.hy926, we first show that cell migration and angiogenesis, as estimated by wound assay and tube formation respectively, are antagonized by 2ME. In zebrafish (Danio rerio) larvae, dose-dependent exposure to 2ME diminishes (1) larval angiogenesis, (2) leukocyte recruitment to damaged lateral line neuromasts and (3) retards the lateral line primordium in its migration along the body. Our results indicate that 2ME has an effect on collective cell migration in vivo as well as previously reported anti-tumorigenic activity and suggests that the molecular mechanisms
The recent publication about the difference in adhesive properties of two different probiotic Lactobacillus plantarum strains reflects some of the multiple technologies accessible at Bioneer. In the paper, two Lactobacilli strains were analyzed and compared by DNA sequencing, ELISA and their ability to interact with gut cell barrier models, to name a few assays. An in-depth analysis, revealed that a single nucleotide change determined the different adhesion capacities among the two strains.. Bioneer is currently developing new model systems for microbiome research. In these efforts, we combine our interdisciplinary skillsets and work towards establishing a standard microbiota cocktail, new culturing procedures for complex microbiomes, develop in vitro cell models with a microbiome feature as well as developing formulations for probiotic strains to better survive gastric acid and bile salts.. If you have any questions related to probiotic characterization, please contact Head of the Protein ...
Alfa Aesar™ Cerium(III) oxalate hydrate, 99% 25g Alfa Aesar™ Cerium(III) oxalate hydrate, 99% Inorganic Cerium Compounds
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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
Vendita di macchine per la lavorazione delle pietre preziose, strumenti per analisi gemmologica e corsi di gemmologia in Italia e allestero, per orafi, gioiellieri, gemmologi, appassionati al mondo delle pietre - Cavalese, Trento, Italy
PolyPid Ltd., an emerging clinical-stage specialty pharmaceutical company focused primarily on the development of a post-surgical anti-infective pipeline, announced today that the
This study was undertaken to assess the contribution of Doppler echocardiography to the quantification of aortic valve regurgitation. Ultrasound examination was performed by recording aortic arch blood flow from the suprasternal notch. A non-invasive index of valve regurgitation was obtained by calculating the ratio between the maximal amplitude of forward flow during systole and the amplitude of retrograde flow during diastole measured at the onset of the R wave of the electrocardiogram. This index was compared with semiquantitative data derived from supravalvular aortography in 93 patients. In pure aortic regurgitation (67 patients) the results showed a high correlation coefficient between Doppler and angiographic estimates. In cases of associated aortic valve stenosis there were problems in the accurate estimation of systolic blood flow which led to global overestimation in general of the degree of regurgitation and considerable lack of precision in individual patients. But in general Doppler ...
We describe an instance of subacute left ventricular free wall rupture during acute myocardial infarction in a 68-year-old man. We describe the presentation and successful treatment of a subacute LVFWR during an AMI in an elderly man. Case Statement A 68-year-old man was seen in a local emergency room for severe retrosternal chest pain accompanied by dyspnea and sweating. A presumed diagnosis of anterior-wall acute myocardial infarction (AMI) with S-T segment elevation was made. Treatment with reteplase was started. The patient ongoing to have upper body pain, however, as well as the S-T portion elevations didnt resolve. Consequently, the individual was used in a tertiary treatment middle, where he underwent percutaneous coronary involvement to deploy a stent in the proximal still left descending coronary artery. Abciximab and clopidogrel had been implemented in this method. The rest of the epicardial coronary arteries were found to be normal. The patients postoperative course over the next 24 ...
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. ...
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 ...
Quality, consistency and innovative solutions to special polishing requirements are ensured not only through ISO 9001 certification but also because of our quality control and R&D departments. The newly completed multi-million dollar expansion program assures our customers high quality products with prompt deliveries.. This section offers general and specific information on most successful and most popular Cerium Oxide polishing powders for the industry. Numerous other grades are available in response to the particular needs of our customers.. CERITE ...
Novel findings of the current study include: 1) significant increase in fractional myocardial dietary fatty acid uptake in IGT+ individuals not explained by difference in age, body fat, central obesity markers, or sex; 2) an association between the latter myocardial metabolic abnormality and reduction in systolic and diastolic left ventricular functions and increased myocardial oxidative metabolism; and 3) no significant changes in liver and skeletal muscle dietary fatty acid uptake in IGT+ individuals. The present results extend the association between increased myocardial NEFA uptake and oxidation and IGT observed during fasting (16) to postprandial dietary fatty acids. In addition, we confirmed the findings of others of reduced subcutaneous abdominal and visceral adipose tissue fractional uptake of dietary fatty acids in abdominally obese individuals (17,18). We furthermore found a direct association between impaired relative dietary fatty acid uptake in abdominal subcutaneous adipose tissue ...
The misfolding of the cellular prion protein (PrPC) into the disease-associated isoform (PrPSc) and its accumulation as amyloid fibrils in the central nervous system is one of the central events in transmissible spongiform encephalopathies (TSEs). Due to the proteinaceous nature of the causal agent the molecular mechanisms of misfolding, interspecies transmission, neurotoxicity and strain phenomenon remain mostly ill-defined or unknown. Significant advances were made using in vivo and in cellula models, but the limitations of these, primarily due to their inherent complexity and the small amounts of PrPSc that can be obtained, gave rise to the necessity of new model systems ...
Establishment of new model systems is imperative for investigating the developmental basis of organismal diversity. Presently, such models are available for only two orders of Arachnida-Cupiennius salei and Parasteatoda tepidariorum (Araneae), and Archegozetes longisetosus and Tetranychus urticae (Acari). The putative clade Dromopoda uniting Scorpiones, Pseudoscorpiones, Solifugae and Opiliones is unrepresented. In order to enrich comparative developmental data for Arachnida, as well as revive embryological study of Opiliones, we investigated the eupnoid harvestman Phalangium opilio as a candidate model organism. In the present study, we sequenced a developmental transcriptome of Phalangium opilio and simultaneously developed protocols for embryo cultivation, fixation, and in situ hybridization. We present data from whole mount in situ hybridization experiments, highlighting the unique morphology of Opiliones using probes for Hox genes (e.g, Ultrabithorax) and leg gap genes (e.g., ...
TY - JOUR. T1 - Kinetics of the methylene blue oxidation by cerium(iv) in sulphuric acid solutions. AU - Katafias, A.. AU - Kita, P.. AU - Wrzeszcz, G.. AU - Mills, A.. PY - 2007/2. Y1 - 2007/2. N2 - The oxidation of methylene blue (MB+) by cerium(IV) was studied in 0.1-5 M H2SO4. The reaction proceeds via MB radical (MB2+•) formed by one electron transfer to the oxidant. The radical is observed spectrophotometrically by a very intense absorbance at λmax = 526 nm and by the e.p.r signal at g = 2.000. The kinetics of the fast radical formation are two orders of magnitude slower than its decomposition, which were examined using a stopped-flow method at 298 K under pseudo-first order conditions. The rate laws for the both steps were determined and a likely mechanism reported.. AB - The oxidation of methylene blue (MB+) by cerium(IV) was studied in 0.1-5 M H2SO4. The reaction proceeds via MB radical (MB2+•) formed by one electron transfer to the oxidant. The radical is observed ...
Optical grade cerium for use on all quartz, agate and jasper. It also produces a great polish on petrified wood, coral, obsidian and man-made glasses including goldstone. Many people prefer cerium for tumbling feldspar materials such as moonstone, labradorite, sunstone and amazonite. 1.5 microns average particle siz
Its usually known that the particle size and particle shape are two irrelevant concepts. But our research shows that the token of particle size is not only related to particle shape, but also related to particle measurement methods. This paper takes sheetlike graphite micropowder for example and gets the function relation between particle shape factor and particle size by analyzing the particle distribution data between laser diffraction and sedimentation. This research provides a new approach for the study of particle shape ...
X-ray and electrochemical studies of organic phases obtained by the extraction of tetravalent cerium, Ce(iv), from aqueous nitric acid (3 M) with tri-n-butyl phosphate (TBP) in n-dodecane reveal a tetranuclear Ce(iv) structural motif. This finding is consistent with the results of previous liquid-liquid extr 2017 PCCP HOT Articles
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The release of radioisotopes from the nuclear fuel was largely controlled by their boiling points, and the majority of the ... cerium-144 and the transuranic elements, including neptunium, plutonium and the minor actinides, embedded in a uranium oxide ... Detailed reports on the release of radioisotopes from the site were published in 1989 and 1995, with the latter report updated ... The remaining quantity of any radioisotope, and therefore the activity of that isotope, after 7 decay half-lives have passed, ...
Radioisotope thermoelectric generators use the heat of radioactive decay to produce electricity.[citation needed] SNAP-1 was a ... test platform that was never deployed, using cerium-144 in a Rankine cycle with mercury as the heat transfer fluid. Operated ... DEEP SEA RADIOISOTOPE-FUELED THERMOELECTRIC GENERATOR POWER SUPPLY SYSTEM. Quarterly Report No. 9, July 1, 1968--September 30, ... The Systems Nuclear Auxiliary POWER (SNAP) program was a program of experimental radioisotope thermoelectric generators (RTGs) ...
... cerium-144, plutonium-240, americium-241, neptunium-237 and various radioisotopes of thorium and radium. By contrast, it ... Radioisotopes can be transformed directly through changes in valence state by acting as acceptors or by acting as cofactors to ... The radioisotope interact with binding sites of metabolically active cells and is used as terminal electron acceptor in the ... Several radioisotopes of strontium, for example, are recognized as analogs of calcium and incorporated within Micrococcus ...
... calcium radioisotopes MeSH D01.496.123.328 - carbon radioisotopes MeSH D01.496.156.300 - cerium radioisotopes MeSH D01.496. ... calcium radioisotopes MeSH D01.496.749.154 - carbon radioisotopes MeSH D01.496.749.185 - cerium radioisotopes MeSH D01.496. ... iron radioisotopes MeSH D01.496.749.540 - krypton radioisotopes MeSH D01.496.749.560 - lead radioisotopes MeSH D01.496.749.590 ... xenon radioisotopes MeSH D01.496.749.960 - yttrium radioisotopes MeSH D01.496.749.980 - zinc radioisotopes MeSH D01.496.807.800 ...
Thirty-eight radioisotopes have been characterized with the most stable being 143Pr, with a half-life of 13.57 days and 142Pr, ... The primary decay products before 141Pr are element 58 (cerium) isotopes and the primary products after are element 60 ( ...
The strontium radioisotopes are very important, as strontium is a calcium mimic which is incorporated in bone growth and ... A great deal of the lighter lanthanides (lanthanum, cerium, neodymium, and samarium) are formed as fission products. In Africa ... It is the most significant radioisotope left in the area around Chernobyl. Caesium-134 is found in spent nuclear fuel but is ...
Jeffrey A. Katalenich Michael R. Hartman Robert C. O'Brien Steven D. Howe (Feb 2013). "Fabrication of Cerium Oxide and Uranium ... The isotope decays by emitting α-particles, which then generate heat (see radioisotope thermoelectric generator). There have ...
The scintillator material cerium activated lanthanum bromide (LaBr3:Ce) was first produced in 2001. LaBr3:Ce-based radiation ... LaBr3 introduces an enhanced set of capabilities to a range of gamma spectroscopy radioisotope detection and identification ...
"Cerium". price.metal.com. Shanghai Metals Market. 3 February 2020. Archived from the original on 2020-02-03. "Promethium". ... Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. Chlorine, sulfur and carbon (as coal) are ... The price listing for radioisotopes is not exhaustive. Background color shows category: 2000s commodities boom Density for 0 °C ... 25 USD/kg cerium - 30 USD/kg praseodymium - 70 USD/kg neodymium - 30 USD/kg samarium - 80 USD/kg europium - 1600 USD/kg ...
DTPA forms complexes with thorium(IV), uranium(IV), neptunium(IV), and cerium(III/IV). In August, 2004 the US Food and Drug ... Technetium-99m is chelated with DTPA for ventilation perfusion (V/Q) scans and radioisotope renography nuclear medicine scans. ... and Cerium(III/IV) with DTPA" Inorganic Chemistry 2012, volume 51, 7741-7748. doi:10.1021/ic300757k ""FDA Approves Drugs to ...
Thirty radioisotopes have been characterised, which range in mass number from 209 to 238. After 232Th, the most stable of them ... In the periodic table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ... These rely on the fact that 232Th is a primordial radioisotope, but 230Th only occurs as an intermediate decay product in the ... Complete drying of the precipitate must be avoided, as air may oxidise cerium from the +3 to the +4 oxidation state, and the ...
Later 90Sr and 137Cs are the main radioisotopes, being succeeded by 99Tc. In the case of a release of radioactivity from a ... After two to three years, cerium-144/praseodymium-144, ruthenium-106/rhodium-106, and promethium-147 are responsible for the ... After about four months, cerium-141, zirconium-95/niobium-95, and strontium-89 represent the largest share of radioactive ... but a considerable number of the radioisotopes have half-lives longer than a day. The radioactivity in the fission product ...
In the periodic table, it appears to the right of the alkaline earth metal barium and to the left of the lanthanide cerium. Its ... Naturally occurring lanthanum is made up of two isotopes, the stable 139La and the primordial long-lived radioisotope 138La. ... Cette raison a engagé M. Mosander à donner au nouveau métal le nom de Lantane." (The oxide of cerium, extracted from cerite by ... Cerium-doped lanthanum bromide and lanthanum chloride are the recent inorganic scintillators, which have a combination of high ...
The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. ... To date, 32 synthetic radioisotopes of the element have been characterized, ranging in mass from 149.973 (lutetium-150) to ... Cerium-doped lutetium oxyorthosilicate is currently the preferred compound for detectors in positron emission tomography (PET ... "Evaluation of cerium doped lutetium oxyorthosilicate (LSO) scintillation crystals for PET". IEEE Transactions on Nuclear ...
When enriched in radioisotopes, such as 137CsCl or 131CsCl, caesium chloride is used in nuclear medicine applications such as ... The extract is treated with antimony chloride, iodine monochloride, or cerium(IV) chloride to give the poorly soluble double ... In the production of radioactive sources, it is normal to choose a chemical form of the radioisotope which would not be readily ... This is a drawback for its radioactive form which urges a search for more stable radioisotope materials. Commercial sources of ...
It works through crystal lattice beads, which are coated with ligand coupling molecules and filled with cerium ions. These give ... IP can also be used in conjunction with biosynthetic radioisotope labeling. Using this technique combination, one can determine ...
It may point to Mayak's aborted attempt to manufacture a capsule of highly radioactive component cerium-144, for the SOX ... 27 December 1993 - Incident at radioisotope plant where the replacement of a filter resulted in the release into the atmosphere ... Today the plant makes tritium and radioisotopes, not plutonium.[citation needed] In recent years, proposals that the plant ... 17 July 1993 - Accident at radioisotope plant, resulting in the destruction of the absorption column and release into the ...
The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. The ... 29 radioisotopes have been characterized, with the most stable being 169 Er with a half-life of 9.4 d, 172 Er with a half-life ... Mosander, C. G. (1843). "On the new metals, Lanthanium and Didymium, which are associated with Cerium; and on Erbium and ... about cerium and lanthanum], Förhandlingar vid de Skandinaviske naturforskarnes tredje möte (Stockholm) [Transactions of the ...
"58 Cerium". Elements.vanderkrogt.net. Retrieved 2008-09-12. "76 Osmium". Elements.vanderkrogt.net. Retrieved 2008-09-12. "77 ... Marinsky, J. A.; Glendenin, L. E.; Coryell, C. D. (1947). "The chemical identification of radioisotopes of neodymium and of ...
If cerium is the dominant lanthanide, then it is converted from cerium(III) to cerium(IV) and then precipitated. Further ... Besides the natural radioisotope 151Eu, 35 artificial radioisotopes have been characterized, the most stable being 150Eu with a ...
... where cerium(IV) oxide in the walls of such ovens helps oxidise carbon-based cooking residues). In soap chemistry, heavy metals ... heavy metals are also employed as spallation targets for the production of neutrons or radioisotopes such as astatine (using ... cerium or bismuth) to exist in different oxidation states and therefore act as catalysts; poorly overlapping 3d or 4f orbitals ...
... cerium-144, ruthenium-106, cobalt-60, curium-242, americium-241 and thulium isotopes have also been studied. ... Electrostatic-boosted radioisotope heat sourcesEdit. A power enhancement for radioisotope heat sources based on a self-induced ... Wikimedia Commons has media related to Radioisotope thermoelectric generators.. *NASA Radioisotope Power Systems website - RTG ... Multi-Mission Radioisotope Thermoelectric GeneratorEdit. NASA is developing a Multi-Mission Radioisotope Thermoelectric ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications. Its advantages include a half-life ... Not to be confused with cerium.. Caesium (IUPAC spelling[6]) or cesium (American spelling)[note 1] is a chemical element with ... Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from ...
... radioisotope Radium Radon Radon fluoride Raman spectroscopy Raoult's law Redox Reduction Reflux Reversible reaction Rhazes ... CAS registry number Cassiterite catalyst Cationic caustic soda Celadonite Celestine Celsius central nervous system Cerium ... Svante Arrhenius Syenite Sylvite synthetic radioisotope systematic element name Tabun Talc Talcum Tantalite Tantalum Tanzanite ...
One type of DXA scanner uses a cerium filter with a tube voltage of 80 kV, resulting in effective photon energies of about 40 ... However, the dose delivered by older DEXA radiation sources (that used radioisotopes rather than x-ray generators) could be as ...
All the remaining radioisotopes have half-lives that are less than 2 days, and the majority of these have half-lives that are ... doi:10.1016/0022-5088(85)90294-2. Lock, J. M. (1957). "The Magnetic Susceptibilities of Lanthanum, Cerium, Praseodymium, ... Finlay, I. G.; Mason, M. D.; Shelley, M. (2005). "Radioisotopes for the palliation of metastatic bone cancer: a systematic ... and two extremely long-lived radioisotopes, 147Sm (half-life t1/2 = 1.06×1011 years) and 148Sm (7×1015 years), with 152Sm being ...
Cerium 1803 H. Klaproth, J. Berzelius, and W. Hisinger 1838 G. Mosander Berzelius and Hisinger discovered the element in ceria ... Marinsky, J. A.; Glendenin, L. E.; Coryell, C. D. (1947). "The chemical identification of radioisotopes of neodymium and of ... cerium had taken that name. Wollaston named it after the more recently discovered asteroid Pallas.[70] ...
Many of these cycles such as the iron oxide cycle, cerium(IV) oxide-cerium(III) oxide cycle, zinc zinc-oxide cycle, sulfur- ... is also sometimes considered as a light radioisotope of hydrogen, due to the mass difference between the antimuon and the ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... 27 radioisotopes have been observed, with the most stable ones being 169Yb with a half-life of 32.0 days, 175Yb with a half- ... The oxide is reduced to metal by heating with lanthanum, aluminium, cerium or zirconium in high vacuum. The metal is purified ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Thirty-six radioisotopes have been characterized, with the heaviest being terbium-171 (with atomic mass of 170.95330(86) u) and ... The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. ... lightest being terbium-135 (exact mass unknown).[12] The most stable synthetic radioisotopes of terbium are terbium-158, with a ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Radioisotopes of caesium require special precautions: the improper handling of caesium-137 gamma ray sources can lead to ... All of the alkali metals except lithium and caesium have at least one naturally occurring radioisotope: sodium-22 and sodium-24 ... Radioisotope Brief: Cesium-137 (Cs-137). U.S. National Center for Environmental Health ...
Radioisotope thermoelectric generator. *Solar power *Photovoltaic system. *Concentrated solar power. *Solar thermal energy * ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... 27 radioisotopes have been observed, with the most stable ones being 169Yb with a half-life of 32.0 days, 175Yb with a half- ... The oxide is reduced to metal by heating with lanthanum, aluminium, cerium or zirconium in high vacuum. The metal is purified ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... While most of germanium's radioisotopes decay by beta decay, 61. Ge. and 64. Ge. decay by β+. delayed proton emission.[46] 84. ... At least 27 radioisotopes have also been synthesized, ranging in atomic mass from 58 to 89. The most stable of these is 68. Ge ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Fourteen radioisotopes have been characterized. The most stable are 15O with a half-life of 122.24 seconds and 14O with a half- ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Fourteen radioisotopes have been characterized. The most stable are 15O with a half-life of 122.24 seconds and 14O with a half- ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... 19 radioisotopes have been characterized, with the most stable being 50Cr with a half-life of (more than) 1.8×1017 years, and ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... 204Tl is the most stable radioisotope, with a half-life of 3.78 years.[12] It is made by the neutron activation of stable ... The radioisotope thallium-201 (as the soluble chloride TlCl) is used in small, nontoxic amounts as an agent in a nuclear ... "Manual for reactor produced radioisotopes" (PDF). International Atomic Energy Agency. 2003. Retrieved 2010-05-13.. ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... is also sometimes considered as a light radioisotope of hydrogen, due to the mass difference between the antimuon and the ... cerium(IV) oxide-cerium(III) oxide cycle, zinc zinc-oxide cycle, sulfur-iodine cycle, copper-chlorine cycle and hybrid sulfur ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... allowing the use of radioisotope rubidium-82 in nuclear medicine to locate and image brain tumors.[50] Rubidium-82 has a very ...
Cerium. Praseodymium. Neodymium. Promethium. Samarium. Europium. Gadolinium. Terbium. Dysprosium. Holmium. Erbium. Thulium. ... The most stable radioisotopes are 107Pd with a half-life of 6.5 million years (found in nature), 103Pd with 17 days, and 100Pd ... Eighteen other radioisotopes have been characterized with atomic weights ranging from 90.94948(64) u (91Pd) to 122.93426(64) u ...
One type of DXA scanner uses a cerium filter with a tube voltage of 80 kV, resulting in effective photon energies of about 40 ... However the dose delivered by older DEXA radiation sources (which used radioisotopes rather than x-ray generators) could be as ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Hg being the most abundant (29.86%). The longest-lived radioisotopes are 194. Hg with a half-life of 444 years, and 203. Hg ... Most of the remaining radioisotopes have half-lives that are less than a day. 199. Hg and 201. Hg are the most often studied ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... The most stable chlorine radioisotope is 36Cl. The primary decay mode of isotopes lighter than 35Cl is electron capture to ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... K are foond in aw potassium, an it is the maist common radioisotope in the human bouk. ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... About 20 radioisotopes and 7 nuclear isomers between 233Cm and 252Cm are known for curium, and no stable isotopes. The longest ... They predominantly emit α-particles, and the heat released in this process can serve as a heat source in radioisotope ... A more promising application of 242Cm is to produce 238Pu, a more suitable radioisotope for thermoelectric generators such as ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Therefore, 210Po is used as an atomic heat source to power radioisotope thermoelectric generators via thermoelectric materials. ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Zn, which has a half-life of 243.66 days, is the least active radioisotope, followed by 72. Zn with a half-life of 46.5 hours.[ ... Xie, Z.; Liu, Q.; Chang, Z.; Zhang, X. (2013). "The developments and challenges of cerium half-cell in zinc-cerium redox flow ... The most common decay mode of a radioisotope of zinc with a mass number lower than 66 is electron capture. The decay product ...
Cerium. Praseodymium. Neodymium. Promethium. Samarium. Europium. Gadolinium. Terbium. Dysprosium. Holmium. Erbium. Thulium. ... Carbon-14 (14C) is a naturally occurring radioisotope, created in the upper atmosphere (lower stratosphere and upper ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications. Its advantages include a half-life ... Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from ... and the radioisotopes present a significant health and ecological hazard in the environment. ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Apart from the practically stable 48Ca, the longest lived radioisotope of calcium is 41Ca. It decays by electron capture to ... Many other calcium radioisotopes are known, ranging from 35Ca to 60Ca. They are all much shorter-lived than 41Ca, the most ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... The most stable bromine radioisotope is 77Br (t1/2 = 57.04 h). The primary decay mode of isotopes lighter than 79Br is electron ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... the radioactivity from the sample was from the naturally occurring potassium radioisotope, potassium-40).[29] He then published ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... Beryllium-7, beryllium-10, and calcium-41 are trace radioisotopes; calcium-48 and barium-130 have very long half-lives and thus ... Of the six alkaline earth metals, beryllium, calcium, barium, and radium have at least one naturally occurring radioisotope; ... health and safety consequences of decommissioning radioisotope thermal generators (RTGs) in Northwest Russia (PDF), Østerås: ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... 96Zr has a half-life of 2.4×1019 years, and is the longest-lived radioisotope of zirconium. Of these natural isotopes, 90Zr is ...
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium ... "Late Effects of Internally Deposited Radioisotopes". In Schwiegk, H.; Turba, F. Radioactive Isotopes in Physiology Diagnostics ...
Strontium-90 releases only beta particles, while iodine-131 and cerium-144 release both beta particles and gamma rays, but ... and cerium-144 emit beta particles that are not distributed evenly in the body. ... Other articles where Cerium-144 is discussed: poison: Local toxicities of common beta-particle emitters: …the isotopes ... the isotopes strontium-90, iodine-131, and cerium-144 emit beta particles that are not distributed evenly in the body. ...
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 07 ISOTOPES AND RADIATION SOURCES; BERYLLIUM FLUORIDES; CERIUM ... ETDEWEB / Search Results / Radioisotopes as tracers for reactions in molten fluoride media; Les radioisotopes comme indicateurs ... title = {Radioisotopes as tracers for reactions in molten fluoride media; Les radioisotopes comme indicateurs des reactions se ... Radioisotopes as tracers for reactions in molten fluoride media; Les radioisotopes comme indicateurs des reactions se ...
There are 35 radioisotopes that have been characterized, with the most stable being 144Ce, with a half-life of 284.893 days; ... 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. ( ) - ...
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. ...
Substances used include chromium oxide (Cr2O3) and radio-isotopes such as cerium-141. A variety of inert materials have been ... Use of radioisotope-labeled lipids in cod suggested that the cods lipase acted in the same manner as mammalian pancreatic ...
The release of radioisotopes from the nuclear fuel was largely controlled by their boiling points, and the majority of the ... cerium-144 and the transuranic elements, including neptunium, plutonium and the minor actinides, embedded in a uranium oxide ... Detailed reports on the release of radioisotopes from the site were published in 1989 and 1995, with the latter report updated ... The remaining quantity of any radioisotope, and therefore the activity of that isotope, after 7 decay half-lives have passed, ...
Americium Oxide Space Radioisotope Power Systems: Cerium-Neodymium Oxide Surrogate Studies. Emily Jane Watkinson, Richard ... Ab-initio Molecular Dynamics Study of the Solubility and Diffusion Coefficient of Cerium in Liquid Sodium ...
In the proceedings of the 1962 Radioisotopes Physical Science Industrial Process Conference at pages 205-216, Cannings et al. ... teach dehydrocyclization of 2,2,4-trimethylpentane over a potassium- and cerium-promoted chromia-alumina catalyst to ... Canings et al., 1962 Radioisotopes Physical Science Industrial Process Conference, pp. 205-216. ... cerium and lead being particularly favored. If present, the concentration of a metal modifier in the catalyst may be within the ...
Radioisotopes; The catalytic metals; The electronic metals; Germanium; Tantalum; Caesium; Barium, beryllium, thallium and the ... other metals - summing up; Bismuth; Lithium; Zirconium; Cerium and the other rare earth elements; The remaining metals: summing ...
... relates to an universal method for the large scale production of high-purity carrier free or non carrier added radioisotopes by ... Chemical effects related to different radioctive decay processes of cerium isotopes chelated with different polyaminocarbonic ... The radioisotopes produced by the method of the present invention are preferably used for producing radioisotope-labelled ... The radioisotopes produced by the inventive method are especially suitable for producing radioisotope-labelled bioconjugates as ...
Cerium,Ce, Nd). Many of the fission products are either non-radioactive or only short-lived radioisotopes. But a considerable ... La cerium,Ce praseodymium,Pr neodymium,Nd promethium,Pm samarium,Sm europium,Eu. -. -. -. Yes. ... number are medium to long-lived radioisotopes such as 90Sr, 137Cs, 99Tc and 129I. Research has been conducted by several ...
... synthetic radioisotope, is a ,radionuclide, that is not found in nature: no natural pr... World Heritage Encyclopedia, the ... Synthetic radioisotope. A synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism ... Some synthetic radioisotopes are extracted from spent nuclear reactor fuel rods, which contain various fission products. For ... Most synthetic radioisotopes are extremely radioactive and have a short half-life. Though a health hazard, radioactive ...
The release of radioisotopes from the nuclear fuel was largely controlled by their boiling points, and the majority of the ... cerium-144 and the transuranic elements, including neptunium, plutonium and the minor actinides, embedded in a uranium oxide ... Amount and types of radioisotopes. While parts of the fuel rods and graphite particles were ejected into the atmosphere at ... From the Wikipedia article on the Chernobyl disaster remarking on the radioisotopes released from Chernobyl:. ...
Cadmium Radioisotopes (0) * Calcium Radioisotopes (0) * Carbon Radioisotopes (0) * Cerium Radioisotopes (0) ...
Addresses the major radioisotopes from Fukushima Disaster. a. Cesium-137 /134 b. Strontium-90 c. Iodine-131 d. Radium e. Cerium ... cation-exchange potential and Radioisotope Adsorption. In exchange for absorbing radiation, Zeolite releases trace amounts of ...
RADIOISOTOPE FUELED AUXILIARY POWER UNIT. Quarterly Progress Report No. 6, April 1958-July 1958, report, October 31, 1963; ... RADIOISOTOPE FUELED AUXILIARY POWER UNIT. Quarterly Progress Report No. 6, April 1958-July 1958 ...
Barium Radioisotopes. *Bromine Radioisotopes. *Cadmium Radioisotopes. *Calcium Radioisotopes. *Carbon Radioisotopes. *Cerium ... "Bromine Radioisotopes" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... This graph shows the total number of publications written about "Bromine Radioisotopes" by people in Harvard Catalyst Profiles ... Below are the most recent publications written about "Bromine Radioisotopes" by people in Profiles. ...
METALLURGY ALLOYS CERIUM AND ......420/1+ NUCLEAR REACTIONS & SYSTEMS .......376 NEUTRON TYPE SYSTEM ............250/390.1+ ... 436/545 RADIOISOTOPE POWERED GENERATOR ...... 310/301+ RADIOISOTOPIC IODINE FOR TESTING .... 436/804* RADIOMETERS LIGHT METERS ...
Besides I-131, there are other toxic radio-isotopes, including cerium 137 and plutonium. Dr. Gabriel Cousens has provided some ...
The patient was treated topically with cerium nitrate/silver sulfadiazine cream and cerium nitrate solution for 3 months. Then ... These results suggest that prolonged topical chemotherapy of cerium nitrate/silver sulfadiazine cream and cerium nitrate ... A large amount of silver was detected both in the liver and in the kidney and a trace of cerium only in the liver. A ... Silver and cerium in the liver and the kidney from severely burned infant were analyzed by neutron activation method.. ...
Animals, Cerium Radioisotopes, Dogs, Female, Hemodynamics, drug effects, Injections, Intravenous, Kinetics, Liver, radionuclide ...
Cerium Radioisotopes. *Cesium Radioisotopes. *Chromium Radioisotopes. *Cobalt Radioisotopes. *Copper Radioisotopes. *Fluorine ... "Copper Radioisotopes" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... This graph shows the total number of publications written about "Copper Radioisotopes" by people in this website by year, and ... Below are the most recent publications written about "Copper Radioisotopes" by people in Profiles. ...
Corrosion Inhibiting Coating Based on Cerium Oxide and a Catecholic Polymer. CN1984708B. Jun 24, 2005. Jan 29, 2014. 皈宵飝利浠田孑肚仾有 ... Compositions and associated methods for radioisotope-binding microparticles. US9744137. Aug 31, 2007. Aug 29, 2017. Supernus ... Corrosion inhibiting coating based on cerium oxide and a catecholic polymer. US9622983. Sep 8, 2016. Apr 18, 2017. Supernus ... Microspheres capable of binding radioisotopes, optionally comprising metallic microparticles, and methods of use thereof. ...
Magnesium Cerium Alloy. Magnesium Neodymium Alloy. Magnesium Gadolinium Alloy Rare Earth Compounds. Scandium Fluoride (ScF3) ... Other uses are in warm superconductors, yttrium radioisotopes in the treatment of cancers, in yttrium stabilized zirconia and ... Magnesium Cerium Alloy. Magnesium Neodymium Alloy. Magnesium Gadolinium Alloy Rare Earth Compounds. Scandium Fluoride (ScF3) ... Magnesium Yttrium MgY25/30 alloy , Magnesium Manganese MgMn3/5/10 alloy , Magnesium Calcium MgCa15/20 alloy, Magnesium Cerium ...
Isotope sources use various types of fuel: plutonium, promethium or cerium," Zhuikov said. ... "a crash likely resulted in not-insignificant radioisotope dispersion." ...
... cerium-144, ruthenium-106, cobalt-60, curium-242, americium-241 and thulium isotopes have also been studied. ... Electrostatic-boosted radioisotope heat sourcesEdit. A power enhancement for radioisotope heat sources based on a self-induced ... Wikimedia Commons has media related to Radioisotope thermoelectric generators.. *NASA Radioisotope Power Systems website - RTG ... Multi-Mission Radioisotope Thermoelectric GeneratorEdit. NASA is developing a Multi-Mission Radioisotope Thermoelectric ...
... the ideal scintillator for use in handheld radioisotope identification devices. A 6-lb SrI2(Eu) radioisotope identifier is ... We have fabricated Cerium-doped Gadolinium Garnets with light yields of ~50,000 Ph/MeV and energy resolution of ,5% at 662 keV ... We measure integral light yields in excess of 80,000 Ph/MeV with Cerium-doped Garnets, and excellent optical quality. Avalanche ... Garnet samples exhibiting a significant fraction of Cerium dopant in the tetravalent valence also exhibit: faster overall ...
Formation Rate of Tetra Valent Cerium in Nitric Acid Solutions Containing Calcium Nitrate (1989) ... Release of sodium and radioisotopes into air associated with sodium combustion. (1976) ...
5.2.3.1 Glass Scintillators: (Cerium Activated Lithium Silicate) *5.2.3.2 Cerium Activated Lanthanum Bromide (Labr3) *5.3 ... 7.3.1 Radio-Isotope Identification Devices (RIID) *7.3.2 Survey Meter *7.3.3 Spectrometer *7.4 Fixed, Installed, and Automatic ...
  • the isotopes strontium-90, iodine-131, and cerium-144 emit beta particles that are not distributed evenly in the body. (britannica.com)
  • Ce-136, 138, and 142 are stable cerium isotopes. (curehunter.com)
  • Although Potassium only has two stable isotopes (K-39 and K-41), the long-lived radioisotope K-40 is often also regarded as a stable isotope. (snznojmo.cz)
  • 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)
  • 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)
  • Strontium-90 releases only beta particles, while iodine-131 and cerium-144 release both beta particles and gamma rays, but their toxicities are primarily caused by the beta particles. (britannica.com)
  • John J. Livingood and I discovered radioisotopes, including iodine-131 and cobalt-60, that are crucial to the diagnosis and treatment of many life-threatening diseases. (lbl.gov)
  • The patient was treated topically with cerium nitrate/silver sulfadiazine cream and cerium nitrate solution for 3 months. (go.jp)
  • The first eleven such elements, neptunium (93) through lawrencium (103) have electrons added to the inner "5ƒ shell" and are members of a second fourteen-member rare earth type series, the actinide elements, chemically analogous to the naturally occuring fourteen-member lanthanide series, cerium (58) though lutetium (71), in which the "4ƒ shell" is being filled. (lbl.gov)
  • 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)
  • Isotope sources use various types of fuel: plutonium, promethium or cerium," Zhuikov said. (taipeitimes.com)
  • 4%, has been achieved with an oxide scintillator, Cerium-doped Gadolinium Yttrium Gallium Aluminum Garnet, or GYGAG(Ce). (spiedigitallibrary.org)
  • The authors prepared a multifunctional antioxidant nanoliposome containing PTEN plasmid and cerium oxide nanoparticles. (prostatecellnews.com)
  • The radioisotopes produced by the inventive method are especially suitable for producing radioisotope-labelled bioconjugates as well as particles, in particular nanoparticles and microparticles. (freepatentsonline.com)
  • Bromine Radioisotopes" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
  • This graph shows the total number of publications written about "Bromine Radioisotopes" by people in Harvard Catalyst Profiles by year, and whether "Bromine Radioisotopes" was a major or minor topic of these publication. (harvard.edu)
  • Below are the most recent publications written about "Bromine Radioisotopes" by people in Profiles. (harvard.edu)
  • Co-60, a commercially important radioisotope, is useful as a radioactive tracer and gamma ray source. (americanelements.com)
  • These objects can be processed by neutron activation to form gamma emitting radioisotopes. (citizendium.org)
  • The present invention relates to an universal method for the large scale production of high-purity carrier free or non carrier added radioisotopes by applying a number of "unit operations" which are derived from physics and material science and hitherto not used for isotope production. (freepatentsonline.com)
  • 1. A method for the large scale production of high-purity carrier-free or non-carrier added radioisotopes comprising the following steps: (a) Activation of a target by a particle beam, (b) Separation of the isotope from the irradiated target, (c) Ionisation of the separated isotope, (d) Extraction from the ion source and acceleration of the ion beam, (e) Mass-separation, and (f) Collection of the isotope. (freepatentsonline.com)
  • Our Zeolite goes through a crucial 3 step cleansing and "Activation" process, yielding maximum Zeolite purity, cation-exchange potential and Radioisotope Adsorption. (pureeffectfilters.com)
  • High purity Cerium sample for collectors & display. (unitednuclear.com)
  • DTPA forms complexes with thorium(IV), uranium(IV), neptunium(IV), and cerium(III/IV). (wikipedia.org)
  • Scientists believe part of the reason the Earth is warm is due to heat generated by radioactive decay of uranium , thorium, and related radioisotopes. (thoughtco.com)
  • 13. " Evaluation of nitrogen-rich macrocyclic ligands for the chelation of therapeutic bismuth radioisotopes . (lanl.gov)
  • A radioisotope thermoelectric generator ( RTG , RITEG ) is an electrical generator that uses an array of thermocouples to convert the heat released by the decay of a suitable radioactive material into electricity by the Seebeck effect . (wikipedia.org)
  • It is a heat source in radioisotope thermoelectric generators , which are used to power some spacecraft . (thefullwiki.org)
  • Most synthetic radioisotopes are extremely radioactive and have a short half-life . (gutenberg.org)
  • Some synthetic radioisotopes are extracted from spent nuclear reactor fuel rods, which contain various fission products. (gutenberg.org)
  • The general field of nuclear medicine covers any use of radioisotopes for diagnosis or treatment. (gutenberg.org)
  • Technetium-99m is chelated with DTPA for ventilation perfusion (V/Q) scans and radioisotope renography nuclear medicine scans. (wikipedia.org)
  • Caesium is mined mostly from pollucite , while the radioisotopes , especially caesium-137 , a fission product , are extracted from waste produced by nuclear reactors . (wikipedia.org)
  • During the late 1930's, my co-workers and I discovered a number of radioisotopes that have become the workhorses of nuclear medicine. (lbl.gov)
  • In all, eight radioisotopes used in nuclear medicine were discovered by my co-workers and me. (lbl.gov)
  • It also offers a selection of radioisotopes, suitable for nuclear imaging and radiotherapy. (chemweb.com)
  • A large amount of silver was detected both in the liver and in the kidney and a trace of cerium only in the liver. (go.jp)
  • 62], The exotic atom muonium (symbol Mu), composed of an antimuon and an electron, is also sometimes considered as a light radioisotope of hydrogen, due to the mass difference between the antimuon and the electron. (rtd.co.th)
  • The radioisotope thulium-170 is used as an electron source in portable X-ray units. (thefreedictionary.com)
  • An autoradiograph is formed when emissions from the radioisotope release energy typically directly or via a light-emitting intensifying screen to sensitive silver halide grains in the emulsion layer or layers of photographic film which form a latent image in the emulsion layer(s). (google.com.au)
  • It is the model for all the other trivalent rare earths and it is the second most abundant of the rare earths after cerium . (americanelements.com)
  • It usually occurs in combination with cerium and other rare earth elements. (newworldencyclopedia.org)
  • It is considered as one of the rare earth elements along with cerium. (lessknownfacts.com)
  • The naturally occurring radioisotopes that the authors measure, {sup 7}Be and {sup 210}Pb, continue to be detected in most air filter samples. (unt.edu)
  • Nonradioactive caesium compounds are only mildly toxic , but the pure metal's tendency to react explosively with water means that caesium is considered a hazardous material, and the radioisotopes present a significant health and ecological hazard in the environment. (wikipedia.org)
  • Release of sodium and radioisotopes into air associated with sodium combustion. (nii.ac.jp)
  • A synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism exists which produces it, or it is so unstable that it decays away in a very short period of time. (gutenberg.org)
  • Oak Ridge National Laboratory (ORNL) played a pioneering role in the development of the first full-scale operating reactor prototype and the initial production of radioisotopes for applications in medical and biological research (Mirzadeh et al. (nap.edu)
  • Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. (curehunter.com)
  • Chemical reactions which may be useful for removing certain constituents from molten fluoride solution have been examined by use of appropriate radioisotopes and standard counting procedures. (osti.gov)
  • Classes of reactions studied have included (1) isotopic exchange between solute tracer and insoluble compound, (2) partition of solute between the melt and a solid solution of a similar compound, and (3) precipitation of the radioisotope as insoluble compound. (osti.gov)
  • 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)
  • L'addition de CeF{sub 3} non actif a chacun de ces systemes augmente la concentration de radioisotopes dans la solution, conformement a la loi d'action des masses. (osti.gov)
  • A required number of said unit operations is combined, selected and optimised individually for each radioisotope production scheme. (freepatentsonline.com)
  • Brookhaven National Laboratory, Medical Department, "Radioisotope Production. (gutenberg.org)
  • Most sources of these are synthetic radioisotopes. (gutenberg.org)
  • Its excellent energy resolution, lack of intrinsic radioactivity or toxicity, and commercial availability make SrI2(Eu) the ideal scintillator for use in handheld radioisotope identification devices. (spiedigitallibrary.org)
  • 1992). The use of radioisotopes is unique in that it provides a method for measuring biochemical processes in vivo, especially in cases in which the process is easily saturated, since radiation makes it possible to detect and localize quantities as small as only a few thousand radiolabeled molecules. (nap.edu)
  • author) [Spanish] Los autores han estudiado las reacciones quimicas que pueden contribuir a la eliminacion, de ciertos constituyentes disueltos en fluoruros fundidos. (osti.gov)
  • Ankit Panda of the Federation of American Scientists said on Twitter that the missile "is suspected to have some sort of a miniaturized reactor in its propulsion unit," and added: "a crash likely resulted in not-insignificant radioisotope dispersion. (taipeitimes.com)
  • Safe use of RTGs requires containment of the radioisotopes long after the productive life of the unit. (wikipedia.org)
  • I expect that the point that I should make at first is that radioisotope enters didn't start with the Manhattan Project and reached clear back into the '30's when Irene Curie first made phosphorus-32 using alpha particles. (oclc.org)