Abstract For many decades, beryllium has been used as a structural element in nuclear installations moderator / breeder of fast neutrons. The consequence neutron irradiation is significant production gas products the form helium and tritium, which leads to swelling loss strength properties reflectors. relatively low melting point also imposes restrictions on high-limit temperature regimes react...

We generate coherent ultraviolet radiation at 313 nm as the third harmonic of an external-cavity diode laser. We use this radiation for laser cooling of trapped beryllium atomic ions and sympathetic cooling of co-trapped beryllium-hydride molecular ions. An LBO crystal in an enhancement cavity generates the second harmonic, and a BBO crystal in a doubly resonant enhancement cavity mixes this se...

A dose-limiting component of a proton accelerator-based source of epithermal neutrons is the neutron production target. Possible targets are lithium, producing high yield but having low melting point and thermal conductivity, and beryllium, presenting less engineering problems but a much smaller neutron yield. We propose that a hybrid Be-Li target would provide the best of both worlds, with the...

Beryllium induces non-caseating granulomatous inflammation in humans exposed to the metal dust or fumes in both occupational and non-occupational settings. The resulting condition, chronic beryllium disease (CBD), affects principally the lungs, lymphatics, and skin and continues to plague modern industry. Beryllium exerts several important immunotoxic effects, including induction of a beryllium...

1. The action of beryllium on the following enzymes has been examined: alkaline phosphatase (Escherichia coli and kidney), acid phosphatase, phosphoprotein phosphatase, apyrase (potato), adenosine triphosphatase (liver nuclei, liver mitochondria, brain microsomes), glucose 6-phosphatase, polysaccharide phosphorylases a and b, phosphoglucomutase, hexokinase, phosphoglyceromutase, ribonuclease, A...

Effects of the metallocarcinogen beryllium on regulation of gene expression were assessed by analysis of hormonal regulation of synthesis of tyrosine aminotransferase in beryllium-treated hepatoma cell cultures. Cell growth was not affected by exposure of the cells to 1 micro M BeSO4 throughout their 4- to 5-day growth cycle. In cells pretreated in this way, the induction by glucocorticoids was...

1. The inhibition of phosphoglucomutase by beryllium has been examined. 2. Inhibition by beryllium does not occur unless a complex-forming agent such as cysteine or imidazole is present. It is therefore similar to activation by magnesium. 3. The inhibition is progressive and the rate follows first-order kinetics, which may be defined by a bimolecular rate constant. 4. In the presence of magnesi...

Beryllium (Be2+) is an important industrial metal because of its unusual material properties: it lighter than aluminium and six times stronger steel. a strategic due to low density combined with strength, neutron absorption, high melting point modulus elasticity. often alloyed other metals such as copper component materials used in the aerospace, automotive, energy, defense, medical, electronic...

A semiclassical perturbation expansion is developed for the ground state energy of three identical particles interacting via pair and three-body potentials. The result is applied for the ground state energy of three neon atoms, where the non-pair-additive terms make a small contribution, and for three beryllium atoms where such terms make a large contribution. Models are constructed for the pai...