Standing clusters

A German saying goes You can t stand upright on one leg only . Looking at the achievements of John D. Corbett it is clear that his scientific body stands solidly on two legs Solid-state Zinfl compounds and centered cluster phases of early transition metals. 

Here, yc stands for the (giant) magnetic moment of the cluster which replaces the "y" for single. Isolated paramagnetic spins k is the Boltzmann constant. 

As demonstrated in Section 3.1.1, the Au SR clusters formed in reaction (1) correspond to trapped intermediates of the growing clusters and are thus not always thermodynamically stable. The stabilities of the Au SG clusters (1-9) are acutely dependent on the core sizes. The Aui8(SG)i4 Au25(SG)i8, and Au39(SG)24 clusters were found to be stable when allowed to stand in aqueous solution while other Au SG clusters were degraded into smaller clusters (Figure 7a) [16]. 

The cell surface contains antigens, which are referred to as CD, which stands for cluster of differentiation. The antibodies are produced against a specific antigen. When administered, usually by an intravenous injection, the antibody binds to the antigen, which may trigger the immune system to result in cell death through complement-mediated cellular toxicity, or the antigen-antibody cell complex may be internalized to the cancer cell, which results in cell death. Monoclonal antibodies also may carry radioactivity, sometimes referred to as hot antibodies, and may be referred to as radioimmunotherapy, so the radioactivity is delivered to the cancer cell. Antibodies that contain no radioactivity are referred to as cold antibodies. 

At Grafton there s not much to see a handful of houses clustered about a Y-fork off the Northampton to Stony Stratford road. There s nothing left of the manor that Elizabeth and Anthony knew, and the church, which they did know, is locked, our effort to get hold of the key foundering on churchwardens who ve gone out for the day. We stand by the porch and wonder what to do. A sign points along a lane and down the hill to Ashton and Hartwell. 

Figure 17. (a) Mass spectra of products arising from reactions of TisCu with methanol. The number stands for the number of methanols associating onto TiaOn, note that association reactions terminate at the eighth step, (b) Under similar conditions, the clustering of pyridine truncates at n = 4. (a) Taken with permission from ref. 115 (b) Taken with permission from NATO ASI Series on Laige Clusters of Atoms and Molecules Kluwer Academic Dordrecht, 1996, pp 371-404. 

Elucidating the origin of magic numbers has been a problem of long-standing interest, made accessible through the use of the laser-based reflectron TOF technique and evaporative ensemble theory. Three test cases are considered, first protonated ammonia clusters where (NH3)4 NHj has been found to be especially prominent, and then two other cases are considered, one involving water cluster ions and another rare gas clusters. 

Fig. 1. Various color-magnitude diagrams for NGC 1851 obtained with uvby filters at the Danish 1.54m telescope on La Silla. Seven stars in our sample have previous low-resolution spectroscopy from [2] which classified them into CN strong (open squares) and CN normal (plusses) groups. Note how the CN strong stars stand out clearly from the cluster sequences when using filter combinations involving the u and v filters. We see from the lower righthand panel that the RGB stars in this cluster also show a large scatter in the mi index at a fixed luminosity - this is the only cluster in our sample of 20 which show mi scatter. This points to very large C variations (larger than for other clusters). Could this be related to the bimodality of the cluster horizontal branch ...

For each wind energy system category, there is a particular approach of how to apply an electrolyzing hydrogen production unit. The most common application studied currently is the stand-alone wind energy system combined with an electrolyzer. The latter is connected in the place of the battery cluster. The electrolyzer unit can be either a PEM or an alkaline type where there is a constant feed with water. The produced hydrogen is usually stored in a tank at the output pressure of the electrolyzer or compressed at a higher... 

However upon standing at ambient conditions the solutions precipitate Ru3(CO)i2 in nearly quantitative yields. Infrared spectra under reaction conditions (400 atm of 1 1 H2/CO, 200°C) also correspond to the spectrum of Ru(CO)5 no acetate or cluster complexes are observed. However, there is evidence for the presence of small amounts of Ru3(CO) 2 under somewhat lower pressures (ca. 200 atm) Many other ruthenium complexes were used as catalyst precursors, and were found to be converted to the same ruthenium products under reaction conditions. For example, H4Ru4(CO)12 (13), [Ru(CO)2(CH3C02)2ln (14) ... 

B cells are produced by the bone marrow. In response to activation of CD4+ T helper cells (see below), B cells proliferate and produce antibodies. (The term CD stands for cluster of differentiation. They are proteins coating cell surfaces. Altogether, there are more than 160 different types of CDs.) The antibodies produced by B cells circulate in the bloodstream and bind to antigens. Once bound, other cells are in turn activated to destroy the antigens. 

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