Crystallizers Armstrong

In a recent study of CO adsorbed on an ion bombardment cleaned Ni(lOO) crystal, Armstrong 210) showed that an ordering of the adsorbed CO could be easily induced by a low energy electron beam and that... 

The most important characteristic of the magnesium oxide powder used in these cements is its reactivity (Glasson, 1963). Magnesium oxide needs to be calcined to reduce this, otherwise the cement pastes are too reactive to allow for placement. Surface area and crystal size are important and relate to the calcination temperature (Eubank, 1951 Harper, 1967 Sorrell Armstrong, 1976 Matkovic et ai, 1977). The lower reactivity of calcined magnesium oxide relates to a lower surface area and a larger crystallite size. 

Armstrong, N. and Gouaux, E., Mechanisms for activation and antagonism of the AMPA-sensitive glutamate receptor crystal structures of the GluR2 ligand binding core, Neuron, 28, 165-181, 2000. 

W. L. Elban and R. W. Armstrong, Plastic Anisotropy and Cracking at Hardness Impressions in Single Crystal Ammonium Perchlorate, Acta Mater., 46, 6041 (1998). 

The first experimental evidence of SHG was reported by Franken et al. [98], who focused a ruby laser beam (kL = 0.694 nm) on a quartz crystal and analyzed the two outgoing beams by a standard method (the second-harmonic beam was observed in the UV region 2XS = 0.347 nm). This experiment was soon followed by a theoretical analysis by Armstrong et al. [99]. Since then many articles have appeared on the subject (bibliographies are presented in Refs. 100 and 101). 

All feeds were prepared in Armstrong scraped surface crystallizers. 

Armstrong, Duane and Havighurst, continuing the investigation of the reflection of X-rays by alkali halide crystals, found that if the crystals were carefully selected for perfection, by observing the sharpness of the photographic registration of a reflected X-ray beam, no effects were obtained which could be ascribed to selective reflection." Allison had also found that no such effect existed in the reflection of X-rays by barite. 

Hie disturbance by abrasive action of the orderly arrangement of atoms in a crystal may be detected by x-ray diffraction early experiments demonstrated such phenomena (3). Armstrong (4) has described a number of x-ray techniques which have been used on inorganic materials such as quartz. Surface abrasion damage was a major problem in the technology of... 

AjH (vlrteous) by Churney and Armstrong (p as discussed on the crystal table. 

Stein PE, Boodhoo A, Armstrong GD, et al. (1994a) The crystal structure of pertussis toxin. In Structure 2 45—57. 

Armstrong RL (1989) Displacive order-disorder crossover in perovskite and antifluorite crystals undergoing rotational phase transitions. Prog NMR Spect 21 151-173... 

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