Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Anomaly residual

As a regional observation, arsenic is concentrated in the >1 mm soil fraction, and defines broad-scale anomalies in areas of shallow bedrock or residual soil. It has probably been adsorbed onto amorphous secondary Fe oxides, some of which have formed pisoliths. By contrast, Au is generally concentrated in the claysized fraction of transported soils. [Pg.4]

Similar products were obtained from metallic silver and from barium chloride (Table 1), though the residues- from the fluorides of other electropositive elements did not show a stoichiometric composition. This apparent anomaly may be explained by supposing that, in general, bases containing the (BrF )- anion are less stable than the acids, and that a number of compounds of this type lose bromine trifluoride at room temperature. The potassium, silver and barium compounds are... [Pg.4]

Bulk techniques still have a place in the search for presolar components. Although they cannot identify the presolar grain directly, they can measure anomalous isotopic compositions, which can then be used as a tracer for separation procedures to identify the carrier. There are several isotopically anomalous components whose carriers have not been identified. For example, an anomalous chromium component enriched in 54Cr appears in acid residues of the most primitive chondrites. The carrier is soluble in hydrochloric acid and goes with the colloidal fraction of the residue, which means it is likely to be submicron in size (Podosck el al., 1997). Measurements of molybdenum and ruthenium in bulk primitive meteorites and leachates from primitive chondrites show isotopic anomalies that can be attributed to the -process on the one hand and to the r- and /7-processes on the other. The s-process anomalies in molybdenum and ruthenium correlate with one another, while the r- and /7-process anomalies do not. The amounts of -process molybdenum and ruthenium are consistent with their being carried in presolar silicon carbide, but they are released from bulk samples with treatments that should not dissolve that mineral. Thus, additional carriers of s-, r-, and/ -process elements are suggested (Dauphas et al., 2002). [Pg.132]

The determination of OXPHOS activity is best made with the aid of spectrophoto-metric assays [55, 65]. Using a judicious set of electron donors and acceptors, it is possible to measure the activity of MRC complexes either isolated or in combination, as described below. Beside the residual activity of each complex, ratios of their respective activities are of fundamental importance. Indeed, the balance between complexes (the ratio between their activities) determines on the one hand the relative access of each dehydrogenase to the MRC, and on the other hand the amount of superoxides possibly escaping the chain [55]. It is therefore quite important to both analyze residual activities corrected for the variable amount of mitochondria using the citrate synthase as reference enzyme, and the various ratios inside the MRC [66,67]. It is also important to note that enzyme determination is (supposedly at least) done under maximal rate (Vmax) conditions only, often leaving aside any discrete anomalies possibly affecting affinity and regulatory properties. [Pg.276]

Anomalies in the power wiring are a common cause of stray magnetic fields in commercial buildings and hospitals. Neutral-to-ground connections downstream of the main bonding connection cause some of the neutral current to return via the ground path. This path is not predictable and results in residual magnetic fields due to mismatch in the supply and return currents to the various electrical circuits in the... [Pg.163]

Explosives may reside on a person in the form of trace (residue from handling explosives, exposure to explosives, or hidden explosives) and/or bulk (a large mass of explosives). The portal technologies that enable the detection of these two forms of explosives may be categorized as trace and anomaly. The detection methods utilized by these two types of portals are substantially different in the signature of the material detected and the... [Pg.370]

To explain anomalies in quantity and composition of FDR deposited under very similar conditions, it has been proposed that most of the mass of the elements detected is contained in a few large particles and that a large variation occurs in the number and composition of these large particles recovered from firing to firing. It has also been suggested that the skin becomes saturated with residue and that the blast from subsequent shots dislodges residue from previous shots. [Pg.129]


See other pages where Anomaly residual is mentioned: [Pg.268]    [Pg.28]    [Pg.144]    [Pg.48]    [Pg.225]    [Pg.52]    [Pg.141]    [Pg.1615]    [Pg.96]    [Pg.311]    [Pg.80]    [Pg.204]    [Pg.205]    [Pg.286]    [Pg.3]    [Pg.5]    [Pg.43]    [Pg.349]    [Pg.331]    [Pg.373]    [Pg.365]    [Pg.182]    [Pg.1661]    [Pg.143]    [Pg.457]    [Pg.101]    [Pg.1081]    [Pg.268]    [Pg.102]    [Pg.107]    [Pg.143]    [Pg.142]    [Pg.35]    [Pg.224]    [Pg.301]    [Pg.172]    [Pg.247]    [Pg.65]    [Pg.52]    [Pg.431]    [Pg.567]    [Pg.56]    [Pg.107]   
See also in sourсe #XX -- [ Pg.409 , Pg.412 , Pg.413 ]




SEARCH



Anomaly

© 2024 chempedia.info