Hersteller-Artikelnummer: RJH-TS120W230C/XE/R7 - Halogenlampe Xenon klar RJH-TS120W230C/XE/R7 Energieeffizienzklasse D, Energieeffizienzklassen-Spektrum A++ bis E, Lampenleistung 120W, Lampenspannung 230 ... 230V, Lichtstrom 2250lm, Sockel R7s, Lampenform Röhre, zweiseitig gesockelt, Durchmesser 12mm, Gesamtlänge 114,2mm, UV-Schutz, Ausführung klar, Farbtemperatur 2950K, Gewichteter Energieverbrauch in 1.000 Stunden 120kWh, Mittlere Nennlebensdauer 2000h, Hochvolt-Halogenlampe klar, Röhrenform, Netzspannung 230V, zweiseitig gesockelt, Sockel R7s, stufenlos dimmbar, 2 000h mittlere Lebensdauer 𪛤
Hersteller-Artikelnummer: RJH-TS160W230C/XE/R7 - Halogenlampe Xenon klar RJH-TS160W230C/XE/R7 Energieeffizienzklasse C, Energieeffizienzklassen-Spektrum A++ bis E, Lampenleistung 160W, Lampenspannung 230 ... 230V, Lichtstrom 3160lm, Sockel R7s, Lampenform Röhre, zweiseitig gesockelt, Durchmesser 12mm, Gesamtlänge 114,2mm, UV-Schutz, Ausführung klar, Farbtemperatur 2950K, Gewichteter Energieverbrauch in 1.000 Stunden 160kWh, Mittlere Nennlebensdauer 2000h, Hochvolt-Halogenlampe klar, Röhrenform, Netzspannung 230V, zweiseitig gesockelt, Sockel R7s, stufenlos dimmbar, 2 000h mittlere Lebensdauer 𪛤
Hersteller-Artikelnummer: RJH-TS230W230/C/XE/R - Halogenlampe Xenon klar RJH-TS230W230/C/XE/R Energieeffizienzklasse C, Energieeffizienzklassen-Spektrum A++ bis E, Lampenleistung 230W, Lampenspannung 230 ... 230V, Lichtstrom 5000lm, Sockel R7s, Lampenform Röhre, zweiseitig gesockelt, Durchmesser 12mm, Gesamtlänge 114,2mm, UV-Schutz, Ausführung klar, Farbtemperatur 2950K, Gewichteter Energieverbrauch in 1.000 Stunden 230kWh, Mittlere Nennlebensdauer 2000h, Hochvolt-Halogenlampe klar, Röhrenform, Netzspannung 230V, zweiseitig gesockelt, Sockel R7s, stufenlos dimmbar, 2 000h mittlere Lebensdauer 𪛤
High Quality Content by WIKIPEDIA articles! A nuclear poison, also called a neutron poison is a substance with a large neutron absorption cross-section in applications, such as nuclear reactors, when absorbing neutrons is an undesirable effect. However neutron-absorbing materials, also called poisons, are intentionally inserted into some types of reactors in order to lower the high reactivity of their initial fresh fuel load. Some of these poisons deplete as they absorb neutrons during reactor operation, while others remain relatively constant. The capture of neutrons by short-halftime fission products is known as reactor poisoning, neutron capture by long-lived or stable fission products is called reactor slagging. Some of the fission products generated during a nuclear reaction have a high neutron absorption capacity, such as xenon-135 (Xe-135, 2,000,000 barns) and samarium-149 (Sm-149, 74,500 ). Because these two fission product poisons remove neutrons from the reactor, they will have an impact on the thermal utilization factor and thus the reactivity. The poisoning of a reactor core by these fission products may become so serious that the chain reaction comes to a standstill.
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Neutron absorbers are isotopes of certain elements that absorb free neutrons creating heavier isotopes of the same element. The most prolific neutron absorbers are elements that become stable by absorbing a neutron such as xenon-135 (Xe-135, half life 9.1 hours), which absorbs a neutron to become Xe-136. Xe-135 is formed in nuclear reactors through the splitting of actinide metals indirectly as a decay product of iodine-135 (I-135), which also has a short half-life. Other isotopes that are major neutron absorbers include Helium-3 (He-3), which becomes tritium and boron-10 (B-10) which becomes Li-7. Samarium-149 formed during the fission process is also a highly effective neutron absorber, with its very long half life it last effectively forever in the fuel until it absorbs a neutron and transmutes into Sm-150, which is stable. Other neutron absorbers used in nuclear power plants include cadmium and gadolinium, both of which consist of mixed isotopes some of which are voracious neutron absorbers.
High Quality Content by WIKIPEDIA articles! The noble gases (often mistakenly referred to as inert gases) are a group of chemical elements with very similar properties: under standard conditions, they are all odorless, colorless, monatomic gases, with a very low chemical reactivity. The six noble gases that occur naturally are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).For the first six periods of the periodic table, the noble gases are exactly the members of group 18 of the periodic table. However, this no longer holds in the seventh period (due to relativistic effects): The next member of group 18, ununoctium, is probably not a noble gas. Instead, group 14 member ununquadium exhibits noble-gas-like properties.
Characterized by destruction of distal parenchymal airspaces, emphysema is a good candidate for the application of new magnetic resonance (MR) diffusion imaging techniques that use hyperpolarized helium-3 (He-3) and xenon-129 (Xe-129) gases to probe the restricted diffusion of gas in the lung. Besides the importance of detecting and diagnosing emphysema at early stages, which could reduce disease severity and maximize the effectiveness of treatment, the scientific community also needs a better biomarker for emphysema with a higher sensitivity than the gold standard, pulmonary function tests, and without the ionizing radiation of computed tomography. A primary goal of this project was to create a reproducible animal model of emphysema disease, and with it demonstrate the efficacy, sensitivity and reproducibility of hyperpolarized He-3 and Xe-129 diffusion (ADC) measurements. Both He-3 and Xe-129 ADC measurements demonstrated excellent reproducibility, and strong correlations were found between these values and the distal airspace size as measured by lung morphometry. The last goal of this project was to investigate the characteristics of diffusion sensitization based on multiple bipolar gradient waveforms, which have the potential to extend access to much shorter diffusion times.
High Quality Content by WIKIPEDIA articles! Xenon hexafluoroplatinate is the name of the product of the reaction of platinum hexafluoride and xenon, in an experiment that proved the chemical reactivity of the noble gases. This experiment was performed by Neil Bartlett at the University of British Columbia, who formulated the product as "Xe+[PtF6] ", although subsequent work suggests that Bartlett's product was probably a mixture and did not in fact contain this specific salt. "Xenon hexafluoroplatinate" is prepared from xenon and platinum hexafluoride (PtF6) as gaseous solutions in SF6. The reactants are combined at 77K and slowly warmed, to allow for a controlled reaction.
High Quality Content by WIKIPEDIA articles! The inability of a reactor to be started due to the effects of Xe-135 is sometimes referred to as xenon precluded start-up. During periods of steady state operation at a constant neutron flux level, the Xe-135 concentration builds up to its equilibrium value for that reactor power in about 40 to 50 hours. When the reactor power is increased, Xe-135 concentration initially decreases because the burn up is increased at the new higher power level. Because 95% of the Xe-135 production is from decay of iodine-135, which has a 6 to 7 hour half-life, the production of Xe-135 remains constant, at this point, the Xe-135 concentration reaches a minimum. The concentration then increases to the new equilibrium level for the new power level in roughly 40 to 50 hours. During the initial 4 to 6 hours following the power change, the magnitude and the rate of change of concentration is dependent upon the initial power level and on the amount of change in power level, the Xe-135 concentration change is greater for a larger change in power level. When reactor power is decreased, the process is reversed.