Alyssa N Campbell

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A computer program that uses artificial intelligence techniques has successfully identified the location of a porphyry molybdenum deposit. Given geological maps of readily available predrilling exploration data for Mount Tolman in Washington State and using rules obtained from a porphyry molybdenum exploration specialist, the program (called PROSPECTOR)(More)
1 Sal'nikov's chemical reaction is very simple; it consists of two consecutive first-order steps, producing a product B from a precursor P via an active intermediate A, in P → A → B. The first step is assumed to be thermoneutral, with zero activation energy, whilst the second step is exothermic and has a positive activation energy. These properties make(More)
Chronic stress or glucocorticoid exposure simplifies hippocampal Cornu Ammonis region 3 (CA3) apical dendritic arbors in male rats. In contrast to males, chronic stress either reduces CA3 basal branching or exerts no observable morphological effects in gonadally intact female rats. Under conditions that females display stress-induced CA3 dendritic(More)
Chronic restraint stress alters hippocampal-dependent spatial learning and memory in a sex-dependent manner, impairing spatial performance in male rats and leaving intact or facilitating performance in female rats. Moreover, these stress-induced spatial memory deficits improve following post-stress recovery in males. The current study examined whether(More)
Sal'nikov's chemical reaction is very simple; it consists of two consecutive first-order steps, yielding a product B from a precursor P via an active intermediate A, in P→A→B. The first of these steps is assumed here to be thermoneutral, with zero activation energy, whilst the second step is taken to be exothermic with a positive activation energy. These(More)
Sal " nikov " s chemical reaction in its simplest form consists of two consecutive first-order steps, producing a product B from a precursor P via an active intermediate A, in P → A → B. The first step is assumed here to be thermoneutral, with zero activation energy, whilst the second step is exothermic and has a positive activation energy. These properties(More)
N.B. Figure 4 should occupy a whole page in landscape orientation. Abstract When any exothermic chemical reaction occurs inside e.g. an unstirred spherical vessel, the heating effect of the reaction often induces temperature gradients and consequently natural convection. This work sets out to compare previously measured temperatures at different positions(More)
  • T P Ivleva, A G Merzhanov, E N Rumanov, N I Vaganova, A N Campbell, A N Hayhurst
  • 2012
This paper reviews various situations, in which a chemical reaction promotes the mixing (of reactants and products) in an unstirred reactor. One example is an exothermic chemical reaction, which of course increases the local temperature of an unstirred reacting fluid and hence decreases the density. This can produce natural convection. Thus if the walls of(More)
When cool flames, or indeed any exothermic chemical reaction, occur inside an unstirred vessel, the heating effect of the reaction often induces temperature gradients and consequently natural convection. The intensity of the resulting flow is governed by the Rayleigh number (Ra). This work examines the behaviour of Sal'nikov's reaction, which is the(More)
The behaviour of a simple chemical reaction, occurring with the release of heat in a closed batch reactor, is considered for the situation when matter and heat are transported only by diffusive processes; thus, the reacting fluid has negligible velocity, so that heat transfer is by thermal conduction. The reaction is Sal'nikov's, which consists of two,(More)