Barium Compounds: Inorganic compounds that contain barium as an integral part of the molecule.Barium Sulfate: A compound used as an x-ray contrast medium that occurs in nature as the mineral barite. It is also used in various manufacturing applications and mixed into heavy concrete to serve as a radiation shield.Barium: An element of the alkaline earth group of metals. It has an atomic symbol Ba, atomic number 56, and atomic weight 138. All of its acid-soluble salts are poisonous.Enema: A solution or compound that is introduced into the RECTUM with the purpose of cleansing the COLON or for diagnostic procedures.Hydroxides: Inorganic compounds that contain the OH- group.Strontium: An element of the alkaline earth family of metals. It has the atomic symbol Sr, atomic number 38, and atomic weight 87.62.Calcium Hydroxide: A white powder prepared from lime that has many medical and industrial uses. It is in many dental formulations, especially for root canal filling.Aluminum Hydroxide: A compound with many biomedical applications: as a gastric antacid, an antiperspirant, in dentifrices, as an emulsifier, as an adjuvant in bacterins and vaccines, in water purification, etc.Hydrogen-Ion Concentration: The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Flavoring Agents: Substances added to foods and medicine to improve the quality of taste.Thorium Dioxide: Thorium oxide (ThO2). A radiographic contrast agent that was used in the early 1930s through about 1954. High rates of mortality have been linked to its use and it has been shown to cause liver cancer.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Solubility: The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Contrast Media: Substances used to allow enhanced visualization of tissues.Tin Compounds: Inorganic compounds that contain tin as an integral part of the molecule.Solar Energy: Energy transmitted from the sun in the form of electromagnetic radiation.Ceramics: Products made by baking or firing nonmetallic minerals (clay and similar materials). In making dental restorations or parts of restorations the material is fused porcelain. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Boucher's Clinical Dental Terminology, 4th ed)Indium: A metallic element, atomic number 49, atomic weight 114.82, symbol In. It is named from its blue line in the spectrum. (From Dorland, 28th ed)Magnets: Objects that produce a magnetic field.Bile Acids and Salts: Steroid acids and salts. The primary bile acids are derived from cholesterol in the liver and usually conjugated with glycine or taurine. The secondary bile acids are further modified by bacteria in the intestine. They play an important role in the digestion and absorption of fat. They have also been used pharmacologically, especially in the treatment of gallstones.Electrodes: Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.Hazardous Substances: Elements, compounds, mixtures, or solutions that are considered severely harmful to human health and the environment. They include substances that are toxic, corrosive, flammable, or explosive.Translating: Conversion from one language to another language.Dental Waste: Any waste product generated by a dental office, surgery, clinic, or laboratory including amalgams, saliva, and rinse water.Pseudoephedrine: A phenethylamine that is an isomer of EPHEDRINE which has less central nervous system effects and usage is mainly for respiratory tract decongestion.Environmental Pollution: Contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.Mobile Applications: Computer programs or software installed on mobile electronic devices which support a wide range of functions and uses which include television, telephone, video, music, word processing, and Internet service.MassachusettsInorganic Chemicals: A broad class of substances encompassing all those that do not include carbon and its derivatives as their principal elements. However, carbides, carbonates, cyanides, cyanates, and carbon disulfide are included in this class.Chemical EngineeringEncyclopediasPhosphorus: A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions.Marketing: Activity involved in transfer of goods from producer to consumer or in the exchange of services.Molecular Sequence Annotation: The addition of descriptive information about the function or structure of a molecular sequence to its MOLECULAR SEQUENCE DATA record.Acrylonitrile: A highly poisonous compound used widely in the manufacture of plastics, adhesives and synthetic rubber.Acetic Anhydrides: Compounds used extensively as acetylation, oxidation and dehydrating agents and in the modification of proteins and enzymes.Ethanolamine: A viscous, hygroscopic amino alcohol with an ammoniacal odor. It is widely distributed in biological tissue and is a component of lecithin. It is used as a surfactant, fluorimetric reagent, and to remove CO2 and H2S from natural gas and other gases.AcrylatesAcrylamide: A colorless, odorless, highly water soluble vinyl monomer formed from the hydration of acrylonitrile. It is primarily used in research laboratories for electrophoresis, chromatography, and electron microscopy and in the sewage and wastewater treatment industries.Air Pollution: The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.New England: The geographic area of New England in general and when the specific state or states are not indicated. States usually included in this region are Maine, New Hampshire, Vermont, Massachusetts, Connecticut, and Rhode Island.Waste Management: 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.United States Environmental Protection Agency: An agency in the Executive Branch of the Federal Government. It was created as an independent regulatory agency responsible for the implementation of federal laws designed to protect the environment. Its mission is to protect human health and the ENVIRONMENT.Medical Waste Disposal: Management, removal, and elimination of biologic, infectious, pathologic, and dental waste. The concept includes blood, mucus, tissue removed at surgery or autopsy, soiled surgical dressings, and other materials requiring special control and handling. Disposal may take place where the waste is generated or elsewhere.Metals, Alkaline Earth: Metals that constitute the group 2 (formerly group IIa) of the periodic table.Beryllium: Beryllium. An element with the atomic symbol Be, atomic number 4, and atomic weight 9.01218. Short exposure to this element can lead to a type of poisoning known as BERYLLIOSIS.Metals, Rare Earth: A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust.Berylliosis: A form of pneumoconiosis caused by inhaled rare metal BERYLLIUM or its soluble salts which are used in a wide variety of industry including alloys, ceramics, radiographic equipment, and vacuum tubes. Berylliosis is characterized by an acute inflammatory reaction in the upper airway leading to BRONCHIOLITIS; PULMONARY EDEMA; and pneumonia.Semiconductors: Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.Temperature: The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.MedlinePlus: NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.

Delayed rectifier potassium current in undiseased human ventricular myocytes. (1/220)

OBJECTIVE: The purpose of the study was to investigate the properties of the delayed rectifier potassium current (IK) in myocytes isolated from undiseased human left ventricles. METHODS: The whole-cell configuration of the patch-clamp technique was applied in 28 left ventricular myocytes from 13 hearts at 35 degrees C. RESULTS: An E-4031 sensitive tail current identified the rapid component of IK (IKr) in the myocytes, but there was no evidence for an E-4031 insensitive slow component of IK (IKs). When nifedipine (5 microM) was used to block the inward calcium current (ICa), IKr activation was fast (tau = 31.0 +/- 7.4 ms, at +30 mV, n = 5) and deactivation kinetics were biexponential and relatively slow (tau 1 = 600.0 +/- 53.9 ms and tau 2 = 6792.2 +/- 875.7 ms, at -40 mV, n = 7). Application of CdCl2 (250 microM) to block ICa altered the voltage dependence of the IKr considerably, slowing its activation (tau = 657.1 +/- 109.1 ms, at +30 mV, n = 5) and accelerating its deactivation (tau = 104.0 +/- 18.5 ms, at -40 mV, n = 8). CONCLUSIONS: In undiseased human ventricle at 35 degrees C IKr exists having fast activation and slow deactivation kinetics; however, there was no evidence found for an expressed IKs. IKr probably plays an important role in the frequency dependent modulation of repolarization in undiseased human ventricle, and is a target for many Class III antiarrhythmic drugs.  (+info)

Alterations of cross-bridge kinetics in human atrial and ventricular myocardium. (2/220)

CONDENSED ABSTRACT: We analyzed actomyosin cross-bridge kinetics in human atrial and ventricular muscle strip preparations by using sinusoidal length changes from 0.1 to 60 Hz. The minimum stiffness frequency was higher in atrial than in ventricular human myocardium and lower in failing than in non-failing left ventricular human myocardium. beta-Adrenergic stimulation increased the minimum stiffness frequency by 18 +/- 3% (p < 0.05). Cross-bridge kinetics are temperature-dependent, with a Q10 of at least 2.7. BACKGROUND: Dynamic stiffness measurements have revealed acute and chronic alterations of actomyosin cross-bridge kinetics in cardiac muscles of a variety of different animal species. We studied dynamic stiffness in right atrial and left ventricular preparations of non-failing and failing human hearts and tested the influence of the temperature and beta-adrenergic stimulation on cross-bridge kinetics. METHODS AND RESULTS: Muscle strips were prepared from right atria and left ventricles from human non-failing and failing hearts. After withdrawal of calcium, steady contracture tension was induced by the addition of 1.5 mM barium chloride. Sinusoidal length oscillations of 1% muscle length were applied, with a frequency spectrum of between 0.1 and 60 Hz. Dynamic stiffness was calculated from the length change and the corresponding force response amplitude. The specific minimum stiffness frequency, which indicates the interaction between cross-bridge recruitment and cross-bridge cycling dynamics, was analyzed for each condition: (1) The minimum stiffness frequency was 0.78 +/- 0.04 Hz in left ventricular myocardium and 2.80 +/- 0.31 Hz in right atrial myocardium (p < 0.01) at 27 degrees C. (2) The minimum stiffness frequency was 41% higher in non-failing compared to failing left ventricular human myocardium. (3) Over a wide range of experimental temperatures, the minimum stiffness frequency changed, with a Q10 of at least 2.7. (4) beta-Adrenergic stimulation significantly (p < 0.05) increased the minimum stiffness to 18 +/- 3% higher frequencies and significantly (p < 0.05) lowered contracture tension by 7 +/- 1%. CONCLUSIONS: The contractility of human heart muscle is not only regulated by excitation-contraction coupling but also by modulation of intrinsic properties of the actomyosin system. Acute and chronic alterations of cross-bridge kinetics have been demonstrated, which play a significant role in the physiology and pathophysiology of the human heart.  (+info)

P2u receptor-mediated release of endothelium-derived relaxing factor/nitric oxide and endothelium-derived hyperpolarizing factor from cerebrovascular endothelium in rats. (3/220)

BACKGROUND AND PURPOSE: Stimulation of P2u purinoceptors by UTP on endothelium dilates the rat middle cerebral artery (MCA) through the release of endothelium-derived relaxing factor/nitric oxide (EDRF/NO) and an unknown relaxing factor. The purpose of this study was to determine whether this unknown relaxing factor is endothelium-derived hyperpolarizing factor (EDHF). METHODS: Rat MCAs were isolated, cannulated, pressurized, and luminally perfused. UTP was added to the luminal perfusate to elicit dilations. RESULTS: Resting outside diameter of the MCAs in one study was 209+/-7 micrometer (n=10). The MCAs showed concentration-dependent dilations with UTP administration. Inhibition of NO synthase with NG-nitro-L-arginine methyl ester (L-NAME) (1 micromol/L to 1 mmol/L) did not diminish the maximum response to UTP but did shift the concentration-response curve to the right. Scavenging NO with hemoglobin (1 or 10 micromol/L) or inhibition of guanylate cyclase with ODQ (1 or 10 micromol/L) had effects on the UTP-mediated dilations similar to those of L-NAME. In the presence of L-NAME, dilations induced by 10 micromol/L UTP were accompanied by 13+/-2 mV (P<0.009) hyperpolarization of the vascular smooth muscle membrane potential (-28+/-2 to -41+/-1 mV). Iberiotoxin (100 nmol/L), blocker of the large-conductance calcium-activated K channels, sometimes blocked the dilation, but its effects were variable. Charybdotoxin (100 nmol/L), also a blocker of the large-conductance calcium-activated K channels, abolished the L-NAME-insensitive component of the dilation to UTP. CONCLUSIONS: Stimulation of P2u purinoceptors on the endothelium of the rat MCA released EDHF, in addition to EDRF/NO, and dilated the rat MCA by opening an atypical calcium-activated K channel.  (+info)

Analysis of multidrug effects by parameter method. (4/220)

AIM: To set up a new analytic method for multidrug effects. METHODS: Based on the principles of the target site kinetics and the equieffective test, a new mathematical model was set as Q = (Eo-Ee)/magnitude of Ee x W-sx x T (-1 < Q < 1 addition, Q < or = -1 antagonism, Q > or = 1 synergism) where Eo = a fitted value of the observed effect of a combination, Ee = an expected value of combined effect, W = an equieffective criterion decided by a special field, sx = a common standard error of Eo and Ee, and T = a value of one-sided t0.05. All the calculations were completed with computer. Dose-effect data from different types of experiments were fitted by the new model and the results were compared with those of other methods. RESULTS: This parameter method dealt with different types of data well fitted with the Hill equation, and was not limited to analyze receptor interaction of drugs, or the number of combined drugs. A series of Q values was obtained from all levels of dose-effect for a systematic analysis. The analysis took the criterion of a special field and laboratory error into account. CONCLUSION: This parameter method can effectively analyze the multidrug effects.  (+info)

The electrical properties of auditory hair cells in the frog amphibian papilla. (5/220)

The amphibian papilla (AP) is the principal auditory organ of the frog. Anatomical and neurophysiological evidence suggests that this hearing organ utilizes both mechanical and electrical (hair cell-based) frequency tuning mechanisms, yet relatively little is known about the electrophysiology of AP hair cells. Using the whole-cell patch-clamp technique, we have investigated the electrical properties and ionic currents of isolated hair cells along the rostrocaudal axis of the AP. Electrical resonances were observed in the voltage response of hair cells harvested from the rostral and medial, but not caudal, regions of the AP. Two ionic currents, ICa and IK(Ca), were observed in every hair cell; however, their amplitudes varied substantially along the epithelium. Only rostral hair cells exhibited an inactivating potassium current (IA), whereas an inwardly rectifying potassium current (IK1) was identified only in caudal AP hair cells. Electrically tuned hair cells exhibited resonant frequencies from 50 to 375 Hz, which correlated well with hair cell position and the tonotopic organization of the papilla. Variations in the kinetics of the outward current contribute substantially to the determination of resonant frequency. ICa and IK(Ca) amplitudes increased with resonant frequency, reducing the membrane time constant with increasing resonant frequency. We conclude that a tonotopically organized hair cell substrate exists to support electrical tuning in the rostromedial region of the frog amphibian papilla and that the cellular mechanisms for frequency determination are very similar to those reported for another electrically tuned auditory organ, the turtle basilar papilla.  (+info)

Functional regulation of L-type calcium channels via protein kinase A-mediated phosphorylation of the beta(2) subunit. (6/220)

Activation of protein kinase A (PKA) through the beta-adrenergic receptor pathway is crucial for the positive regulation of cardiac L-type currents; however it is still unclear which phosphorylation events cause the robust regulation of channel function. In order to study whether or not the recently identified PKA phosphorylation sites on the beta(2) subunit are of functional significance, we coexpressed wild-type (WT) or mutant beta(2) subunits in tsA-201 cells together with an alpha(1C) subunit, alpha(1C)Delta1905, that lacked the C-terminal 265 amino acids, including the only identified PKA site at Ser-1928. This truncated alpha(1C) subunit was similar to the truncated alpha(1C) subunit isolated from cardiac tissue not only in size ( approximately 190 kDa), but also with respect to its failure to serve as a PKA substrate. In cells transfected with the WT beta(2) subunit, voltage-activated Ba(2+) currents were significantly increased when purified PKA was included in the patch pipette. Furthermore, mutations of Ser-478 and Ser-479 to Ala, but not Ser-459 to Ala, on the beta(2) subunit, completely abolished the PKA-induced increase of currents. The data indicate that the PKA-mediated stimulation of cardiac L-type Ca(2+) currents may be at least partially caused by phosphorylation of the beta(2) subunit at Ser-478 and Ser-479.  (+info)

Bone as an ion exchange system: evidence for a pump-leak mechanism devoted to the maintenance of high bone K(+). (7/220)

To provide evidence of active accumulation of K(+) in bone extracellular fluid (BECF), electric currents driven by damaged living metatarsal bones of weanling mice, immersed in physiological media at different [K(+)], in the presence of blockers of the K(+) channels or of the Na(+)-K(+-)ATPase inhibitor, were measured by means of a voltage-sensitive two-dimensional vibrating probe. At 4 mM extracellular K(+) concentration ([K(+)](o)), an inward steady current density (7.85-38.53 microA/cm(2)) was recorded at the damage site, which was significantly dependent on [K(+)](o). At [K(+)](o) equal to that of BECF (25 mM), current density was reduced by 76%. At [K(+)](o) of 0 mM, the current density showed an increase, which was hindered by tetraethylammonium (TEA). Basal current density was reduced significantly after exposure to TEA or BaCl(2) and was unchanged after long- term exposure to ouabain. By changing control medium with a chloride-free medium, current density was reversed. The results support the view that K(+) excess in bone is maintained by a biologically active cellular system. Because the osteocyte-bone lining cell syncytium was at the origin of the current in bone, it is likely that this system controls the ionic composition of BECF.  (+info)

Altered regulation of potassium and calcium channels by GABA(B) and adenosine receptors in hippocampal neurons from mice lacking Galpha(o). (8/220)

To examine the role of G(o) in modulation of ion channels by neurotransmitter receptors, we characterized modulation of ionic currents in hippocampal CA3 neurons from mice lacking both isoforms of Galpha(o). In CA3 neurons from Galpha(o)(-/-) mice, 2-chloro-adenosine and the GABA(B)-receptor agonist baclofen activated inwardly rectifying K(+) currents and inhibited voltage-dependent Ca(2+) currents just as effectively as in Galpha(o)(+/+) littermates. However, the kinetics of transmitter action were dramatically altered in Galpha(o)(-/-) mice in that recovery on washout of agonist was much slower. For example, recovery from 2-chloro-adenosine inhibition of calcium current was more than fourfold slower in neurons from Galpha(o)(-/-) mice [time constant of 12.0 +/- 0.8 (SE) s] than in neurons from Galpha(o)(+/+) mice (time constant of 2.6 +/- 0.2 s). Recovery from baclofen effects was affected similarly. In neurons from control mice, effects of both baclofen and 2-chloro-adenosine on Ca(2+) currents and K(+) currents were abolished by brief exposure to external N-ethyl-maleimide (NEM). In neurons lacking Galpha(o), some inhibition of Ca(2+) currents by baclofen remained after NEM treatment, whereas baclofen activation of K(+) currents and both effects of 2-chloro-adenosine were abolished. These results show that modulation of Ca(2+) and K(+) currents by G protein-coupled receptors in hippocampal neurons does not have an absolute requirement for Galpha(o). However, modulation is changed in the absence of Galpha(o) in having much slower recovery kinetics. A likely possibility is that the very abundant Galpha(o) is normally used but, when absent, can readily be replaced by G proteins with different properties.  (+info)

Barium chloride is a chemical substance. It is among the most important salts of barium. It is soluble in water. It is a poison. When it is heated, it gives a yellow or green color to the flame. It is hygroscopic, meaning that it attracts water from the air. It is mainly used to purify brine but applications include fireworks. Barium chloride is toxic. Sodium sulfate may be an antidote. ...
Read across from BaCl2*2H2O to BaCO3: The toxicity of barium carbonate and barium chloride may reasonably be considered to be determined by availability of Ba2+cations. As a first surrogate for bioavailability, the solubility of a test substance may be used. This was investigated for barium carbonate experimentally in a test for comparative bio-accessibility with barium carbonate and barium chloride in artificial gastric juice (HCl, pH=1.5): an excess of each test item was added to a freshly prepared HCl solutions (pH=1.5) to obtain saturation (for details, please refer to IUCLID section 4.20 "pH" of this dossier). It could be shown that the solubility of barium carbonate in acidic media at 37°C is 3.7 g/L, whereas 510.4 g/L of barium chloride could be dissolved under equal conditions. In consequence, the solubility of barium carbonate under these conditions is more than two orders of magnitude less than that of barium chloride. However, it is to be concluded that this read-across is possible ...
The merchandise covered by the order is barium chloride, a chemical compound having the formulas BaCl2 or BaCl2-2H2O, currently classifiable under item number 2827.39.45.00 of the Harmonized Tariff Schedule of the United States (HTSUS). The scope reflects the HTSUS item number currently in effect. Although the HTSUS item number is provided for convenience and for U.S. Customs and Border Protection purposes, the written description remains dispositive ...
I was reading in the book that it says that barium chloride contains water but yet it is not wet, and does not feel wet. that is why we refer to it as a hydrous salt. i asked my lecturer about this but she gave a brief answer and i do not fully understand why it is so. i tried searching answers in the internet but to no avail. thank you for your help ...
New apparatus and a new process for the sputter deposition of modified barium titanate thin-films were developed. Films were deposited at temperatures up to 900 °C from a Ba0.96Ca0.04Ti0.82Zr0.18O3 (BCZTO) target directly onto Si, Ni and Pt surfaces and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Film texture and crystallinity were found to depend on both deposition temperature and substrate: above 600 °C, the as-deposited films consisted of well-facetted crystallites with the cubic perovskite structure. A strongly textured Pt (111) underlayer enhanced the (001) orientation of BCZTO films deposited at 900 °C, 10 mtorr pressure and 10% oxygen in argon. Similar films deposited onto a Pt (111) textured film at 700 °C and directly onto (100) Si wafers showed relatively larger (011) and diminished intensity (00ℓ) diffraction peaks. Sputter ambients containing oxygen caused the Ni underlayers to oxidize even at 700 °C: Raising
CAS Number: 10326-27-9
Formula: BaCl2·2H2O
Density: 3.1 g/mL
Boiling and Freezing Point: 1560°C, 925°C
Solubility: Water
Synonyms: Barium Dichloride
Shelf Life: 36 MonthsChemicals for science education are available in easy-to-use formats with instructions for students to be introduced to a variety of subjects. These chemicals can be purchased in individual amounts or bulk kits for compatibility with classroom-sized demonstrations or independent studies. Products are designed for educational and teaching laboratories, and may or may not come with a certificate of analysis when ordered.
In this paper,a mild alcohol-thermal synthesis of nano-BaTiO3 from H2TiO3 and Ba(OH)2 at an Atmospheric Press was systematically studied and the optimized preparation conditions were obtained. When the reaction was carried out at a temperature of 79,an atmospheric press for 6h, the moral ratio of Ba(OH)2: H2TiO3=1.0, pH=11, the cubic crystal structure of nano-BaTiO3 was obtained. By comparison with ordinary BaTiO3 ceramic capacitor, the dielectric ceramic capacitor fabricated by nano-BaTiO3 could not only lower sintering temperature from1300 to1150, but also change Courier point from 130 to 70, improve dielectric constant from 6000 to 20000,which can satisfy the development of microdevics.
Data on 6,500 pesticides, insecticides and herbicides including toxicity, water pollution, ecological toxicity, uses and regulatory status.
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Eyes: In case of an eye exposure, the eyes should be flushed with lots of water for a minimum of 15 minutes. The eyelids should be lifted occasionally while the eyes are sprinkled with water. A doctor should be consulted after that.. Skin: In case of a skin contact, a dermatologist should be contacted immediately. The contaminated clothing should be removed immediately and the clothes and shoes should be washed properly before being reused. The infected skin areas should be washed with running water for a minimum of 15 minutes.. Ingestion: In case of ingestion, the victim should be given proper medical attention. Vomiting should not be induced under any circumstances. Nothing ever should be given orally to an unconscious individual. If the victim is alert and conscious, the mouth should be rinsed properly and a few cups of water or milk should be given to the individual.. Inhalation: The victim should be immediately removed to an area of fresh air. Artificial respiration should be used if the ...
LaNiO{sub 3}-BaTiO{sub 3} superlattices with different types of interfaces are studied from first-principles density-functional theory. It is revealed that the ferroelectricity in the superlattice with (NiO{sub 2}){sup −}/(BaO){sup 0} interfaces is enhanced from that of the superlattice with (LaO){sup +}/(TiO{sub 2}){sup 0} interfaces. The origin lies at the polar discontinuity at the interface, which makes the holes localized within the (NiO{sub 2}){sup −}/(BaO){sup 0} interface, but drives a penetration of electrons into BaTiO{sub 3} component near (LaO){sup +}/(TiO{sub 2}){sup 0} interface. Our calculations demonstrate an effective avenue to the robust ferroelectricity in BaTiO{sub 3} ultrathin films. ...
An improved high dielectric constant ink useful in making thick film capacitors is disclosed in which a dielectric material is combined with a glass bonding agent having an electropositive element common with the dielectric material. In a preferred embodiment, the improved dielectric material comprises a barium titanate dielectric combined with barium zinc glass.
Transparent and high permittivity films of poly(methyl methacrylate)-grafted 7 nm barium titanate particles prepared by surface-initiated atom transfer radical polymerizationTransparent and high permittivity films of poly(methyl methacrylate)-grafted 7 nm barium titanate particles prepared by surface-initiated atom transfer radical polymerization ...
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The company has also posted information on its website and is producing a series of training videos and educational materials that will walk clinicians through the basic functions of an anesthesia machine and differences between anesthesia devices and ICU ventilators.. Some hospitals have begun using anesthesia machines as ventilators - others are likely to follow. Its an atypical use for the machines, but these are atypical times - and the Anesthesia Patient Safety Foundation says that using anesthesia machines for their ventilating capabilities "certainly should be considered as a life-saving intervention.". For example, ventilation modes and settings are different on anesthesia machines and ventilators, says Nolan. For one thing, ventilators employ a one-way system - passing air and gas into a patients lungs only once - whereas patients hooked up to an anesthesia machine rebreathe some of the air and gases delivered by the device.. Clinicians need to know how to translate between the ...
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TY - JOUR. T1 - Oxygen nonstoichlometry and dielectric evolution of BaTiO 3. Part I - Improvement of insulation resistance with reoxidation. AU - Yang, G. Y.. AU - Dickey, E. C.. AU - Randall, C. A.. AU - Barber, D. E.. AU - Pinceloup, P.. AU - Henderson, M. A.. AU - Hill, R. A.. AU - Beeson, J. J.. AU - Skamser, D. J.. PY - 2004/12/15. Y1 - 2004/12/15. N2 - Impedance spectroscopy, transmission electron microscopy, and electron energy-loss spectroscopy are used to correlate local electrical properties with the microstructure and microchemistry of BaTiO 3 in Ni-electrode multilayer ceramic capacitors. High densities of linear defects and some grains with structural modulations are observed in BaTiO 3 grains in the as-cofired capacitors. The modulated structure is formed on {111} planes of the BaTiO 3. Both types of structural defects are associated with high concentrations of oxygen vacancies. In particular, the oxygen content in the BaTiO 3 grains that are in direct contact with the internal Ni ...
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We develop second-harmonic nanoparticles as the contrast agents for cell imaging. Second-harmonic nanoparticles show promise as cell imaging probes due to their non-bleaching, non-blinking, and coherent signal. Nanoparticles of noncentrosymmetric crystal structures have high second-harmonic generation (SHG) efficiency and provide high contrast in a generally non-structured cell environment. Here, we use barium titanate (BaTiO3) nanoparticles with tetragonal crystal structure as imaging probes. Cytotoxicity tests performed on BaTiO3 nanoparticles with mammalian cells did not result in toxic effects. Specifically we observed no change in the cell metabolism after 24 hours incubation of the cells with high concentration of BaTiO3 nanoparticles. We demonstrate two methods of cell labeling with BaTiO 3 nanoparticles for imaging. One is non-specific labeling via endocytosis of the cells, which results in a great number of the nanoparticles randomly distributed inside the cells. The other is specific ...
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The photoferroelectric barium titanate (BaTiO3)/polyvinylidene fluoride (PVDF) composite films in the ratio 70:30 are found to possess good photosensitivity in the visible region of the spectrum. Results on the investigations of charge generation, trapping, recombination, discharge, and retention properties of the composite film are presented in this paper. The dark polarization and dark depolarization characteristics of the film show that it can accept and retain very high charge for a very long time. The charge decay properties of the dark polarized and photo depolarized electrosensitized sample indicate that it can be used successfully in electro-photographic applications as the dark decay is found to be slow while the light decay is very fast. In addition to this, the photo polarization and photo depolarization studies of the polarized films show that the film has very good remnant polarization,which persists for several hours to days. The persistence of polarization, its magnitude, and the ...
List provided by StopSprayingCalifornia.com. Of course, the most logical question about this unsavory list of noxious ingredients is: "Why are there so many known toxins included in the mix?". More specifically, the preponderance of barium salt (barium chloride) and alumina (aluminum oxide), which are said to exist in the greatest concentration in chemtrails, is particularly alarming. Why? Because barium is well known to decrease and/or impair immune function. Aluminum oxide has its own set of problems, especially when inhaled in certain concentrations over prolonged periods of time. Aluminum, in any form, is not very easy for the body to detoxify, especially when it finds a home in the lungs.". Harnessing liquid-Sunshine for a flight over the blue lagoon for a moonlite nite cannot exist anymore. Our emotional balance and attachments to the natural are fading into greyness-Excesses" then the recesses of the mind play havoc. My word-term for this is "mindscAPe". "R". "Chemtrailing the skies of ...
A new technique for creating films of barium titanate (BaTiO3) nanoparticles in a polymer matrix could allow fabrication of improved capacitors able to store twice as much energy as existing devices. The improved capacitors ...
This Application Note describes the photometric determination of sulfate in aqueous solutions using the Optrode (520 nm). Sulfate is precipitated with an excess of barium chloride solution. Excess barium is subsequently titrated with EDTA.
First-principles total-energy calculations are carried out for (001) surfaces of the cubic perovskite ATiO compounds PbTiO, BaTiO, and SrTiO. Both AO-terminated and TiO-terminated surfaces are considered, and fully-relaxed atomic configurations are determined. In general, BaTiO and SrTiO are found to have a rather
Pressure testing the anesthesia machine prior to inducing anesthesia improves both patient and team member safety. Use these tips to properly pressure test the machine and identify common sources of leaks. 
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A number of accessories to connect a gas source (O2 or N2O ) to an anesthesia machine are available. Regulators are specific for the type of gas and tank size (small, E-cylinder or large, H-cylinder) used. All regulators terminate in a gas specific male DISS fitting. E-cylinder regulators attach to tank using a yoke and can only be used with E-size tanks with a post block. Other fittings and connectors are available, call Harvard Apparatus Tech Support for more information.
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A recent study conducted by Fact.MR reveals that the global anesthesia machines market is set to reflect a CAGR of 5.4% between 2017 and 2022.
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AES has developed a custom line of Anesthesia Machine Top Shelves to add additional storage, mounting options, and hooks to your work area.. Shelves are available for:. ...
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Sheet structures wherein the composition of one layer comprises a first component of a polypropylene, a second component of an ethylene-based copolymer, and a third component which provides some properties representative of elastomeric polymers. The invention further contemplates packages made from the sheet structures incorporating the recited compositions.
The morning of my shift involves setting up the following items: (1) Anesthesia machine (2) Airway setup (3) Primary and secondary drug setup ANESTHESIA MACHINE SET UP At my institution, we use an Apollo Drager anesthesia machine (among others, but for the purposes of this post, well keep it simple and just focus on the…
Asimakopoulos, I., Zoumpoulakis, L. and Psarras, G. C. (2012), Development and characterization of a novolac resin/BaTiO3 nanoparticles composite system. J. Appl. Polym. Sci., 125: 3737-3744. doi: 10.1002/app.36518 ...
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abstract = {A method is proposed for evaluating the potential piezoelectric response, that a ferroelectric material would exhibit after full poling, from elastic and dielectric measurements of the unpoled ceramic material. The method is based on the observation that the softening in a ferroelectric phase with respect to the paraelectric phase is of piezoelectric origin, and is tested on BaTiO3. The angular averages of the piezoelectric softening in unpoled ceramics are calculated for ferroelectric phases of different symmetries. The expression of the orientational average with the piezoelectric and dielectric constants of single crystal tetragonal BaTiO3 from the literature reproduces well the softening of the Youngs modulus of unpoled ceramic BaTiO3, after a correction for the porosity. The agreement is good in the temperature region sufficiently far from the Curie temperature and from the transition to the orthorhombic phase, where the effect of fluctuations should be negligible, but ...
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The Newsletter of Biomedical Safety and Standards. 11(4):42, APRIL 1981. Issn Print: 0048-0282. Publication Date: April 1981. ...
Clinical Case for Discussion: It is the conclusion of a craniotomy for a tumor resection on a 50-year-old, 80 kg woman. The operating room table is turned 180 degrees, you are the sole anesthesiologist. and you are at the patients feet. The nurse and scrub tech are applying the head dressing. The patient coughs, turns her…
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HEF-1/ Cas-L, 0.1 ml. HEF1 is a multifunctional protein involved in integrin-based signaling that affects cell motility, growth, apoptosis and oncogenic transformation.
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Multiwalled carbon nanotube (MWNT)/BaTiO3 functional nanocomposites were fabricated via the spark plasma sintering technique. The resistivity of MWNT/BaTiO3 nanocomposites was found higher than that of MWNT-free BaTiO3 ceramics. In addition, the temperature dependence of resistivity showed abnormal metallic conductance behavior in the 1 wt. % MWNT/BaTiO3 nanocomposite. It was proposed to be due to the additional subgrain boundary between MWNT and BaTiO3 matrix, which led to transformation from an impurity-scattering mechanism to a dominant lattice-scattering mechanism in the MWNT/BaTiO3 nanocomposites as the content of carbon nanotubes increased. Based on observed unique electrical properties, bilayer ceramics stacked by one layer of MWNT-free BaTiO3 and another layer of MWNT/BaTiO3 nanocomposite were fabricated and showed excellent rectification property ...
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Sintering process is a complex of different synergetic effects during the ceramics materials consolidation. The microstructural level properties control is very important as a stage in advanced materials prognosis. SEM analysis of Yb/BaTiO3 doped ceramics showed that in samples doped with a low level of dopant and sintered at higher temperatures the grain size ranged from 10-60μm, while with the higher dopant concentration the grain size ranged between 2-15μm. The morphology of sintered BaTiO3-ceramics grains points out the validity of developing new structure analytical methods based on different geometries of grains model systems. The idea of electrical properties of BaTiO3-ceramics being influenced by intergrain microcontacts can be successfully followed if we start with the two-sphere Cobles model and also the correction of the Cobles model. In this paper, the grains contact models based on spherical, ellipsoidal and polyhedral geometries are presented making a new modeling tool... for ...
A 6.70 g sample of a binary mixture of silver (I) nitrate and sodium nitrate is completely dissolved in water to make a solution. Aqueous barium chloride is then added to this solution in excess to form 3.60 g of silver chloride solid ...
Proven Ventilation Versatility. The electrically driven and electronically controlled Fabius GS E-vent ventilator requires no drive gas. This makes it more flexible and economical to use than traditional gas-driven bellows ventilators by limiting the consumption of expensive medical grade gas to patient use only. Motor-driven hardware and software-controlled functionality also offer virtually unlimited upgradeability. The Fabius GS is suitable for any patient - pediatric to adult - and provides Volume Controlled Ventilation, Pressure Controlled Ventilation, Synchronized Volume Control (SIMV), Pressure Support and Manual/Spontaneous modes. Pressure Support mode facilitates spontaneous breathing by removing the work of breathing due to circuit resistance, improving comfort levels and enhancing quality of patient care.. The Fabius GS is the worlds first anesthesia machine with vertical flow controls and electronic fresh gas flow indicators, enabling you to compare gas flows more easily and ...
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TABLE-US-00002 TABLE 2 Supplementary Supplementary Supplementary Examples and Barium titanate external additive A external additive B external additive C Comparative (amount, parts by (amount, parts by (amount, parts by (amount, parts by Examples weight) weight) weight) weight) Example 1-1 100 nm Ba-1 30 nm SiO2 55 nm SiO2 -- (2.5) (2.5) (1.5) Example 1-2 100 nm Ba-1 30 nm SiO2 55 nm SiO2 80 nm TiO2 (2.5) (2.5) (1.5) (1.5) Example 1-3 100 nm Ba-1 30 nm H--SiO2 55 nm P--SiO2 -- (2.5) (2.5) (1.5) Example 1-4 100 nm Ba-1 30 nm H--SiO2 55 nm P--SiO2 80 nm St-TiO2 (2.5) (2.5) (1.5) (1.5) Example 1-5 100 nm Ba-1 30 nm H--SiO2 55 nm P--SiO2 80 nm St-TiO2 (0.2) (2.5) (1.5) (1.5) Example 1-6 100 nm Ba-1 30 nm H--SiO2 55 nm P--SiO2 80 nm St-TiO2 (7.0) (2.5) (1.5) (1.5) Example 1-7 100 nm Ba-1 3 nm H--SiO2 55 nm P--SiO2 80 nm St-TiO2 (2.5) (2.5) (1.5) (1.5) Example 1-8 100 nm Ba-1 60 nm H--SiO2 55 nm P--SiO2 80 nm St-TiO2 (2.5) (2.5) (1.5) (1.5) Example 1-9 100 nm Ba-1 30 nm H--SiO2 20 nm P--SiO2 80 nm ...
A new ferroelectric molecule offers potential as an organic alternative to silicon-based semiconductors, with possible applications in memory, cost-effective energy storage, and sensors, say researchers from the University of Washington and Southeast University. As a ferroelectric, the molecule has one positive and one negative side that can be reversed with an electrical field. The current performance standard for ferroelectrics is barium titanate, and the researchers say the new molecule competes impressively as an indicator of molecule alignment strength for data storage. The molecule also retains its properties at temperatures up to 307 degrees Fahrenheit, whereas a separate organic ferroelectric recently unveiled in the journal Nature only performs at room temperature. In terms of energy storage, the molecule has a dielectric constant over 10 times higher than for other organic ferroelectrics. The molecule also is promising in sensor applications, because it is an effective piezoelectric ...
Good through April 27, 2018. *Clinic or University* Purchase a Versa II Anesthesia Machine at full retail price and you will receive a vaporizer exchange at no charge! In addition, trade in your old anesthesia machine to receive $300.00 off the price of the Versa II Anesthesia Machine! *Only vaporizer styles Tec 3, Tec 4, Tec 5, Drager, Penlon, Ohio will be exchanged ...
Page contains details about BaTiO3 nanoparticle-containing cellulose nanofiber paper . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
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I can understand how you worked it out. I used another method by working out the number of moles using moles=mass/mr of baso4 then i wrote the equation bacl2+h2so4=baso4+2hcl and everything is a 1:1 ratio so the same moles of bacl2 were used. I worked out the mass of bacl2 from this using the mass=mr x moles. Then i took this away from the mass of both bacl2 and mgcl2 to work out how much mgcl2 there was. My answer was also 35.5 ...
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An easily prepared, chemically sensitive substrate for the detection of soluble micron-sized atmospheric sulfate and certain other water-soluble particles, with a light microscope, was developed. The substrate is made from an aqueous solution of polyvinyl alcohol (PVA), barium chloride, glycerol, and Triton X-100 which is spread on a glass slide and dried. Particles are collected on the slide and then observed under a dark field or phase contrast optical microscope. Under humid conditions, barium chloride reacts with sulfate particles to form PVA-insoluble barium sulfate. This precipitates in a Liesegang ring, while nonsulfate water-soluble components dissolve into the PVA medium. Photomicrography before and after moisture treatment reveals the sulfate and soluble constituents of the particulate sample. The method can be employed to detect sulfate particles as small as 0.3 microns. The number of soluble particles and percent sulfate composition per particle in aerosol samples can be estimated.
hydrochloride and indapamide via their chloride contents and captopril via its sulphur content. In case of oxprenolol hydrochloride, an excess of standard silver nitrate was added, the precipitated silver chloride was centrifuged and the silver contents of both the precipitate and the decanted solution were determined by atomic absorption spectrophotometry. In case of indapamide, oxygen flask combustion method was first carried out. Captopril was ashed using oxygen flask combustion method, followed by adding a known excess of barium chloride and the precipitated barium sulfate was centrifuged. The excess barium chloride in the decanted solution was determined by atomic absorption spectrophotometry ...
Probably participates in establishing action potential waveform and excitability of neuronal and muscle tissues. Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. Can be blocked by extracellular barium or cesium.
Probably participates in establishing action potential waveform and excitability of neuronal and muscle tissues. Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. Can be blocked by extracellular barium or cesium.
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It and barium have some uses in medicine, for example "barium meals" in radiographic imaging, whilst strontium compounds are ... "Barium and Barium Compounds". In Ullman, Franz (ed.). Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/ ... such as barium nitrate. These in turn are thermally decompressed into barium oxide, which eventually yields pure barium after a ... Barium has some use in vacuum tubes to remove gases,[50] and barium sulfate has many uses in the petroleum industry,[4] as well ...
It and barium have some uses in medicine, for example "barium meals" in radiographic imaging, whilst strontium compounds are ... Calcium and barium are weakly radioactive: calcium contains about 0.1874% cacium-41, and barium contains about 0.1062% barium- ... "Barium and Barium Compounds". In Ullman, Franz. Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/14356007 ... such as barium nitrate. These in turn are thermally decompressed into barium oxide, which eventually yields pure barium after a ...
... s are typically iodine, barium-sulphate or gadolinium based compounds. They absorb external X-rays, ... Barium swallow (oesophageal investigation) Barium meal (stomach investigation) and double contrast barium meal Barium follow ... As in the picture on the right where both air and barium are used together (hence the term "double-contrast" barium enema) air ... This may be bound either in an organic (non-ionic) compound or an ionic compound. Ionic agents were developed first and are ...
... compounds have been synthesized containing a cation of the alkaline earth metal barium. Alkali metals are well known ... M. Y. Redko; R. H. Huang; J. E. Jackson; J. F. Harrison; J. L. Dye (2003). "Barium azacryptand sodide, the first alkalide with ... An alkalide is a chemical compound in which alkali metals are anions (that is, they bear a negative charge). Such species are ... "Lithides" and "francides", compounds containing Li− or Fr−, respectively, are not currently known. The known alkalides, first ...
Rosenmund reduction, a reduction using palladium on barium sulphate, poisoned with sulphur compounds. Urushibara Iron, an iron ... Thus if a compound contains a double bond as well as a triple bond, only the triple bond is reduced. An example being the ...
"Barium and Barium Compounds", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, pp. 1-21, doi:10.1002/14356007. ... Barium polysulfide is a fungicide and acaricide used in fruit and grape growing. Bismuth compounds have been used because of ... Thallium compounds such as thallium sulfate have been used for impregnating wood and leather to kill fungal spores and bacteria ... Some organic lead compounds are used as industrial biocides: thiomethyl triphenyllead is used as an antifungal agent, cotton ...
The government licensed a fluorine-acetate-barium compound and distributed it through hunting associations. Since the fall of ... Strychnine was the most frequently used compound. The poison would be typically mixed in lard or tallow, and spread on bits of ...
Common compounds containing metasilicate anion are: Sodium metasilicate Calcium metasilicate Barium metasilicate. ...
Mixing the two compounds forms a barium sulfate precipitate, which causes turbidity in the solution. A 0.5 McFarland standard ... Original McFarland standards were made by mixing specified amounts of barium chloride and sulfuric acid together. ... is prepared by mixing 0.05 mL of 1.175% barium chloride dihydrate (BaCl2•2H2O), with 9.95 mL of 1% sulfuric acid (H2SO4). Now ...
The term titanates usually refers to titanium(IV) compounds, as represented by barium titanate (BaTiO3). With a perovskite ... Owing to the important role of titanium compounds as polymerization catalyst, compounds with Ti-C bonds have been intensively ... In nature, this compound is found in the minerals anatase, brookite, and rutile. Paint made with titanium dioxide does well in ... The most common compound, titanium dioxide, is a popular photocatalyst and is used in the manufacture of white pigments. Other ...
Arsenic, barium, DEHP, glycol compounds, manganese, phenol, and sodium were found in unacceptable levels in the wells. As a ...
Barium manganate has also been used to oxidize hydrazones to diazo compounds. Manganates are unstable towards ... Manganates are the only known manganese(VI) compounds. The manganate(VI) ion is tetrahedral, similar to sulfate or chromate: ... 2 MnO2 + 4 OH− + O2 → 2 MnO2− 4 + 2 H2O Manganates, particularly the insoluble barium manganate, BaMnO4, have been used as ... Synth., 11: 56-61 . Procter, G.; Ley, S. V.; Castle, G. H. (2004), "Barium Manganate", in Paquette, L., Encyclopedia of ...
Two other synthetic blue barium copper silicate compounds have been found in trace amounts, but are as yet unnamed. They are ... O2 Both Han purple and Han blue are barium copper silicates (containing barium, copper, silicon, and oxygen). However, they ... The barium source was either witherite (BaCO3) or baryte (BaSO4). The rarity of witherite may favor baryte as the most likely ... A Purple Barium Copper Silicate Pigment from Early China. Studies in Conservation 28/1, 15-23. Liu, Z.; Mehta, A.; Tamura, N.; ...
... barium (often barium sulfide), tungsten, or other high atomic weight elements. Sometimes opacifiers are added to medical ... In context of x-rays, opacifiers are additives with high absorption of x-rays; typically these are particles or compounds of ... Fluorides of aluminium, calcium, barium, and magnesium can be used with suitable heat treatment. Tin oxide can be used, but ...
Forms an explosive compound with copper. Barium nitrate - most common oxidizer/colorant for green and white colors, but with ... Barium also serves as a stabilizer for the mixtures; decomposes at higher temperatures than nitrates of lighter metals and ... Barium chlorate - also serves as a green colorant in fireworks; sensitive, better to avoid. Almost non-hygroscopic. ... Also, some chloride molecular emitters are much stronger than oxides of the same element, as in the case of Barium and ...
Few other compounds of uranium(V) are stable. Barium uranate, BaUO3, is made from barium oxide and uranium dioxide in an ... For example, microcrystalline barium diuranate, BaU2O7 was made by thermal decomposition of barium uranyl acetate at 900 °C. Ba ... Compounds with the formula MIUO3 have a perovskite structure. Compounds MI3UO4 have a defect rock-salt structure. MI7UO6 ... up to about 208 pm in the related compound α-UO3, so it is debatable as to whether these compounds all contain the uranyl ion. ...
SK 285523, Šimurka, Peter; Peter Vrábel & Viera Petrušková et al., "Lead-free crystal glass, barium, niobium, and compounds ...
It was noted that ZnO2 was preferable to the usage of barium compounds, as it was deemed to be less toxic. The zinc compound ... Recently the compound has found use as a mineral stain for wood and other substances. The mechanism of this action involves the ... This effect was hypothesized to depend upon the compound's penchant for oxygen donation. It has been suggested that the ... Another advantage of ZnO2 was, as compared to the barium and strontium pyroingredients, it effects less corrosion in the ...
... is a halide mineral with the chemical formula BaF2 which corresponds to the chemical compound barium fluoride. ... The natural existence of barium fluoride was predicted by Michael Fleischer in 1970. Later in the same year, the mineral was ... Although synthetic barium fluoride has been commonly known from at least 1846, it had not been found in nature. ... cleavage crystal faces varies between 88 and 94 kg/mm2 and is close to that of the synthetic barium fluoride (95 kg/mm2). Its ...
Small amounts of barium impurities give the compound a rose color. It is soluble in water, though less so than barium chloride ... Insoluble radium compounds coprecipitate with all barium, most strontium, and most lead compounds. Radium oxide (RaO) has not ... The Curies found the radioactive compounds to be very similar to the barium compounds, except that they were more insoluble. ... compounds of barium, which gave a brilliant green flame color, and unknown radioactive compounds which gave carmine spectral ...
... uranium and thorium compounds. Being a compound of arsenic, it is highly toxic. Analytical Chemistry, 51, 2293 (1979). MSDS at ... Thorin (also called Thoron or Thoronol) is an indicator used in the determination of barium, beryllium, lithium, ...
... is a mixture of 80% calcium hydroxide and 20% barium hydroxide compounds that is used to absorb the exhaled carbon ...
The color green, for instance, may be produced by adding the various compounds and salts of Barium, some of which are toxic, ... The color of a compound in a firework will be the same as its color in a flame test (shown at right). Not all compounds that ... A fuel which allows the star to burn An oxidizer-a compound which produces (usually) oxygen to support the combustion of the ... Fireworks produce smoke and dust that may contain residues of heavy metals, sulfur-coal compounds and some low concentration ...
... analysis has demonstrated it to be an entirely artificial compound, a barium-strontium ferrite. Magnetic Hematite on Mindat.org ...
... chemical reactions involving the dissociated elements of the perchlorate-potassium and chlorine ions-create barium compounds ... During combustion, various strontium compounds (especially Sr(OH)2 emit red light, most of which is between 506 and 722 nm in ... Colors are manipulated by adding compounds which, when ignited, release visible light and other radiation. For example, when ... which emit green light (especially BaCl2). The potassium compounds formed by this reaction emit mostly near-infrared light, and ...
Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium ... Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. pp. 444-446. ISBN 0-07-049439-8. . Retrieved ... Heiserman, David L. (1992). "Element 39: Yttrium". Exploring Chemical Elements and their Compounds. New York: TAB Books. pp. ... Once reached a human, scandium concentrates in the liver and is a threat to it; some its compounds are possibly carcinogenic, ...
As barium compounds emit a green light when burned, barium salts are often used in green pyrotechnic formulas, but the nitrate ... Due to the relatively high atomic number (Z = 56) of barium, its compounds absorb X-rays more strongly than compounds derived ... Because barium sulfate is the least toxic salt of barium due to its insolubility, wastes containing barium salts are sometimes ... Although barium is a heavy metal, and its water-soluble compounds are often highly toxic, the low solubility of barium sulfate ...
Barium and barium compounds  Choudhury, Harlal; Cary, Richard; World Health Organization; International Programme on Chemical ...
As no data on the acute inhalation toxicity of either of these two barium compounds exist, the IDLH is based on a calculated ... Therefore, the revised IDLH for soluble barium compounds is 50 mg Ba/m3 based on acute oral toxicity data in humans [Reeve 1979 ... No inhalation toxicity data are available on which to base an IDLH for soluble barium compounds. ... Reeve AL [1979]. Barium. In: Friberg L, et al., eds. Handbook of toxicology of metals. New York, NY: Elsevier/North Holland, pp ...
barium compound solubility. updated sat 23 nov 02. iandol on wed 20 nov 02. Hello friends, Just read an interesting comment ... Wish I could find the Barium Equivalent. Best regards, Ivor Lewis. Ron Roy on fri 22 nov 02. Barium is not a refractory in high ... like barium? Thanks, Paul Lewing John Hesselberth on wed 20 nov 02. Hi Paul, I have no data on this. Ive never tested for lead ... solubility of Barium Carbonate in a clear Felspathic glaze, in the range = 2%-40% of glaze volume. When people mention the word ...
Barium and compounds. CAS No: Varies. NOTE:. (1) Efficacy of Medical Tests has not been evaluated.. (2) NIOSH references ...
The FSM of HA was separated successfully from the substrate by means of dissolution of Ba-compound with water. Our novel ... We can deposit the Ba-compound sacrificial layer only in 1 hour followed with the direct deposition of crystallized HA layer, ... In this short report, we proposed a novel sacrificial layer, heatproof and water-soluble Ba-compound, which makes the direct ... "Direct Process to Prepare Crystallized Freestanding Membranes of Hydroxyapatite Using Sacrificial Layer of Barium-Compounds" ...
Barium compounds explanation free. What is Barium compounds? Meaning of Barium compounds medical term. What does Barium ... Looking for online definition of Barium compounds in the Medical Dictionary? ... barium. (redirected from Barium compounds). Also found in: Dictionary, Thesaurus, Encyclopedia. barium. (Ba) [bar´e-um] a ... Barium compounds , definition of Barium compounds by Medical dictionary https://medical-dictionary.thefreedictionary.com/Barium ...
... calcium is what? ... What is the formula for the ions in the compounds BaSO4 and Li2CO3 BaSO4 has barium ions (Ba2+, Sulfate ions SO42-, and Lithium ... He weighs out 0.945 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 33.9 mL of barium ... A student is asked to standardize a solution of barium hydroxide. ...
BARIUM AND BARIUM COMPOUNDS Barium and barium compounds. (Concise international chemical assessment document ; 33) toxicity ... Barium Compounds , Steubenville, OH Barium Chemicals, Inc.. Used to manufacture other barium compounds and is used by the ... Barium Compounds , Barium compounds are found primarily in two mineral ores-barite, which contains the sulfate compound, and ... Barium sulfate , chemical compound , In barium: Compounds. Barium sulfate (BaSO 4) is a white, heavy insoluble powder that ...
Barium Compounds suppliers, Barium Compounds exporters, Barium Compounds importers. Get contact address of Barium Compounds ... Barium Compounds, Barium Chloride, Barium Hydroxide Octahydrate, Barium Peroxide, Barium Sulp... ... Ammonium Compounds, Aluminium Compounds, Barium Compounds, Copper Compounds, Lead compou... ... Manufacturers, Exporters and Importers of Silver Compounds, Silver Chloride, Silver Nitrate, Silver Oxide, ...
Barium and barium compounds. QV 618 2001CH Chlorinated naphthalenes. QV 618 2005TI Tin and inorganic tin compounds. QV 618 86WH ... Barium and barium compounds. Contributor(s): Choudhury, Harlal , Cary, Richard , World Health Organization , International ... Barium -- toxicity , Barium compounds -- toxicity , Risk assessment , Environmental exposure , Chemical Toxicology and ...
Barium is non-combustible, but may decompose upon heating to produce corrosive or toxic fumes (HSDB 2007a). Elemental barium ... Barium is a silvery-white to yellowish odorless metal that is found in nature primarily as barium sulfate or barium carbonate ( ... and barium sulfide may be flammable in moist air (ATSDR 2005). ... Other barium compounds (barium acetate, barium chloride, barium ... barium sulfate and barium carbonate. Water-soluble barium compounds (barium acetate, barium chloride, barium hydroxide, barium ...
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; BARIUM IONS; BISMUTH COMPOUNDS; CERAMICS; ... Journal Article: Effect of diamagnetic barium substitution on magnetic and photovoltaic properties in multiferroic BiFeO{sub 3} ... Title: Effect of diamagnetic barium substitution on magnetic and photovoltaic properties in multiferroic BiFeO{sub 3} ... CONCENTRATION RATIO; CURRENT DENSITY; ELECTRIC CONDUCTIVITY; FERRITES; INDIUM COMPOUNDS; IRON OXIDES; MAGNETIZATION; ...
Barium and compounds. Varies. 0022. Benzene. 71-43-2. 0023. Benzidine. 92-87-5. ...
  • It occurs as the mineral barite , which is the main commercial source of barium and materials prepared from it. (wikipedia.org)
  • About 80% of the world's barium sulphate production, mostly purified mineral, is consumed as a component of oil well drilling fluid . (wikipedia.org)
  • The general population can be exposed to low amounts of barium in air, water, and food. (cdc.gov)
  • Small amounts of barium can be released into the air during mining and other industrial processes. (cdc.gov)
  • Some people who eat or drink amounts of barium above background levels found in food and water for a short period may experience vomiting, abdominal cramps, diarrhea, difficulties in breathing, increased or decreased blood pressure, numbness around the face, and muscle weakness. (cdc.gov)
  • Eating or d rinking very l arge amounts of barium compounds that easily dissolve can cause changes in heart rhythm or paralysis and possibly death. (cdc.gov)
  • however, do not mix well with water, the amount of barium the total number of NPL sites evaluated for these usually found in drinking water is small. (cdc.gov)
  • Finding a measurable amount of barium in urine does not imply that the level of barium causes an adverse health effect. (cdc.gov)
  • However, the amount of barium in foods and drinking water are typically too low to be of concern. (cdc.gov)
  • Based on limited human and animal data, Oral - Primary route of exposure for duration (how long), and the Barium is a silvery-white metal that the respiratory tract is the most sensitive general population. (cdc.gov)
  • Barium is a silvery-white metal which exists in nature only in ores containing mixtures of elements. (cdc.gov)
  • Barium is a soft, silvery-white metal, with a slight golden shade when ultrapure. (wikipedia.org)
  • The following is the reaction for the synthesis of barium ferrate using the wet method: Ba(OH)2 (aq) → BaO(s) + H2O NaClO + FeNO3 + BaO(s) → BaFeO4 + NaCl + NO The reaction for the formation of barium ferrate is vigorous and very strong chlorine odor. (wikipedia.org)
  • Because it is an oxidizer, a chlorine donor, and contains a metal, this compound produces a green color that is unparalleled. (wikipedia.org)
  • The increasing environmental concerns resulted in the preference of peroxides over chlorine-based compounds and a sharp increase in the peroxide production. (wikipedia.org)
  • The MRL is based on a BMDL05 of 61 mg barium/kg/day for nephropathy in male mice (NTP 1994) and an uncertainty factor of 100 (10 to account for animal to human extrapolation and 10 for human variability) and modifying factor of 3 to account for the lack of an adequate developmental toxicity study. (cdc.gov)
  • Severe hypokalemia induced by barium toxicity can cause ventricular dysrhythmias (1-7). (cdc.gov)
  • The fractionation of barium in Brazil nuts was studied owing to the toxicity of this element and the strong correlation between chemical form and absorption. (scielo.br)
  • The toxicity of barium depends upon the solubility of its compounds. (cdc.gov)
  • We do not know whether children will be more or less sensitive than adults to barium toxicity. (cdc.gov)
  • 2005. Uncertainty of inductively coupled plasma mass spectrometry based measurements: An application to the analysis of urinary barium, cesium, antimony, and tungsten. (cdc.gov)
  • Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives. (wikipedia.org)
  • The color blue is notoriously difficult to produce in fireworks, as the copper compounds need to be heated at a specific temperature for the optimal shade of blue to be produced. (wikipedia.org)