In the present work, to determine the effective atomic number of composite materials of known composition such as brass, bronze, soldering material, perspex and bakelite, the scattering of 279 keV γ-rays is studied using a high-resolution HPGe (high purity germanium) semiconductor detector placed...
But in the last number of the Berichte of the German Chemical Society, Lothar l\Ieyer has calculated, from :-l"ilson and Pettersson's numbers, the true specific heat (i.e. the ratio between the quantity of heat required to raise unit weight of the given substance through 1°, start-...
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Undoubtedly a conversation starter, this titanium pen is also offered in three other premium metal options if you so choose (brass, copper, and dark gray zirconium). It’s also offered in three heights, but we went with the 5.8-inch option, which has a great in-hand feel and perfect wei...
We have investigated the accuracy with which the effective atomic number (Zeff) of an alloy can be measured using the intensity of the thick-target bremsstrahlung produced by low-energy electrons incident on the alloy target. The experiments involved 5 keV-electron beams incident on thick brass, ...
Atomic-4 serial number - Colin 14:57:25 02/23/04 ( 0) Wanted Atomic 4 - Bill 21:54:35 02/19/04 ( 0) Free: 2 x Atomic 4's as parts - David Noakes of Rumson NJ 12:05:30 02/19/04 ( 4) You can now buy bits of the 2 A4's from - David Noakes 15:59:30 02/25...
A clock is a mechanical or electrical device other than a watch for displaying time. A clock is a machine in which a device that performs regular movements in equal intervals of time is linked to a counting mechanism that records the number of movements.
In his article Staying on the Cutting Edge of Science Fiction, James Wallace Harris notes if you study the history of science fiction ideas, they break down into a limited number of areas: Interplanetary travel Interstellar travel Alien life forms Artificial beings (robots, AI, digital life, art...
They are generally elite fighters, since spacecraft usually can only carry a limited number of them. There will be a "space army", which are usually just the old ground army troops ferried to combat zones on other planets on huge lightly armed troop carriers. Finally there might be a ...
A number of physical and chemical properties of the intermolecular interfaces a... J Susan,DTA Daley,NM Luscombe,... - 《Nucleic Acids Research》 被引量: 590发表: 2011年 Protein–RNA interactions: a structural analysis A detailed computational analysis of 32 protein–RNA complexes is presented....