Chemical Thermodynamics. By Frederick D. Rossini.

MacDougall, F. H.

doi:10.1021/j150485a020

Cited by 6 publications

(16 citation statements)

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“…(Phung et aL, 1994). The arrangement and deduced amino acid sequence of vapBand vapCare similar to putative proteins in the trbH region of the Escherichia coil F plasmid (Jalakumari and Manning, 1989) and the vapD gene shows a high level of sequence similarity to ORF5 from the cryptic plasmid of Neisseria gonorrhoea (Korch et aL, 1985), the ORFA-ORFB intergenic region of the Treponema denticola plasmid pTD1 (MacDougall et aL, 1992) and an ORF from a rolling-circle plasmid from the bacterium Actinobacillus actinomycetemcomitans (Galli and LeBlanc, 1994). The functions of all of these ORFs are unknown.…”

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confidence: 99%

A role for bacteriophages in the evolution and transfer of bacterial virulence determinants

Cheetham

Katz²

1995

Molecular Microbiology

246

174

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SummaryA virulence-associated region in the genome of DicheIobacter nodosus has been shown to contain an integrase gene which is highly related to the integrases of Shigella flexneri phage Sf6 and coliphages P4 and ~R73, together with open reading frames (vapB, C and D) related to genes borne on plasmids in Neisseria gonorrhoeae, Escherichia coil, Actinobacillus actinomycetemcomitans and Treponema denticola. Similar to P4 and ~R73, the vap region is bracketed by putative bacteriophage att sites and is adjacent to a tRNA gene, which suggests that the vap region has been derived by the integration of a bacteriophage, or a plasmid cartying a bacteriophage-related integrase gene. Many similarities in genes and genes clusters encoding virulence determinants have been found in distantly related bacteria. These genes are often located on plasmids in one organism but on the chromosome in others, implying that transmission of the genes has been followed by integration. Thus, the events which have generated the vap regions of D. nodosus may represent a common mechanism for transfer of virulence determinants. A number of genes involved in the virulence of bacterial pathogens are found on integrated bacteriophages, and we suggest that others will prove to be associated with tRNA genes and/or integrase genes derived from bacteriophages. The use of tRNA genes as integration sites for many bacteriophages and plasmids may favour intergeneric transmission, as tRNA genes are highly conserved. The vap regions of Dichelobacter nodosusWork in our laboratory has focussed on the vap regions,

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confidence: 99%

A role for bacteriophages in the evolution and transfer of bacterial virulence determinants

Cheetham

Katz²

1995

Molecular Microbiology

246

174

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“…in fact it has similarities with a general area of interest, i.e. time dependent Aharonov-Bohm effect (see for example [17,18,19]). As pointed out in [17] explicit time dependence in a multiply connected coordinate space induces some amount of ambiguity in defining physical variables.…”

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confidence: 87%

“…As pointed out in [17] explicit time dependence in a multiply connected coordinate space induces some amount of ambiguity in defining physical variables. In fact [19] specifically studies Stokes theorem in similar context and reveals a surprising result that Stokes theorem can be satisfied only in a particular gauge. These studies are important in the context of recent practical applications [20].…”

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confidence: 97%

“…{(−aq sinqφ cospφ−p((c+acosqφ)sinpφ), (−q sinqφ sinpφ+p((c+acosqφ)cospφ), q acosqφ}. (19) For the special case Ω = Ω 3k , (since we have seen from (15) that only Ω 3 contributes), 20) and it is clear that only the first term (∼Ω 3 ) will survive the loop integration. Comparing with (15) the structures are obviously similar but we do not pursue with this computation any further and remain satisfied with (12) as the Hanny angle for the (p, q)-knot.…”

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Geometric Phases for Classical and Quantum Dynamics: Hannay Angle and Berry Phase for Loops on a Torus

Ghosh

2019

Int J Theor Phys

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In this paper we have considered closed trajectories of a particle on a two-torus where the loops are noncontractible (poloidal and toroidal loops and knots embedded on a regular torus). We have calculated Hannay angle and Berry phase for particle traversing such loops and knots when the torus itself is adiabatically revolving. Since noncontractible loops do not enclose any area Stokes theorem has to be applied with caution. In our computational scheme we have worked with line integrals directly thus avoiding Stokes theorem.(1) Introduction: Classical limit to quantum phenomena is much more than a naive → 0. In this context the relation between two geometrical objects, Berry phase [1] in quantum regime and Hannay angle [2] in classical domain is indeed fascinating and has generated a lot of interest in theoretical and experimental physics. Quite interestingly, contrary to common occurrences, Berry phase (the quantum effect) was discovered first which was followed by its classical counterpart, Hannay angle and the delicate issue of identifying the latter as a semi-classical limit of the former was rigorously settled by Berry [3]. As a quantum system traverses a closed loop in parameter space the anholonomy, (in Hilbert space where the system lives), is responsible of the appearance of Berry phase. On the other hand, Hannay angle is generated by anholonomy in the trajectory of the classical system in physical configuration space (or more generally in the abstract action-angle manifold).An important generalization to multi-dimensional systems, (consisting of more than one degrees of freedom), where the quantum system in classical limit can show chaotic behavior, was performed by Robbins in [4] (hereafter referred to as JR). Precursors to this work are [5] where physical effects of (the classical limit of) geometric 2-form manifests in a Lorentz force form of "geometric magnetic" force 1 . However, an interesting question, as pointed out in [7], was whether the classical limit 1 This turned out to be the anti-symmetric partner of "deterministic friction", a dissipative force proposed by 1 arXiv:1905.03491v1 [quant-ph]

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“…While the time-independent AB and AC effects have been extensively studied both theo-1 However, in the experiment carried out in [7] the observed phase shift was 50% larger than the theoretical prediction retically and experimentally, the same does not hold for the time-dependent cases when the magnetic flux in the solenoid or the electric charge on the wire are time-dependent. The theoretical predictions as to the outcome of a time-dependent AB experiment have been studied in [10] [11] [12]. There is some disagreement, theoretically, as to the outcome of the time-dependent AB effect.…”

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confidence: 99%

The time-dependent Aharonov–Casher effect

Singleton¹,

Ulbricht²

2016

Physics Letters B

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In this paper we give a covariant expression for Aharonov-Casher phase. This expression is a combination of the canonical electric field, Aharonov-Casher phase plus a magnetic field phase shift. We use this covariant expression for the Aharonov-Casher phase to investigate the case of a neutral particle with a non-zero magnetic moment moving in the time dependent electric and magnetic fields of a plane electromagnetic wave background. We focus on the case where the magnetic moment of the particle is oriented so that both the electric and magnetic field lead to non-zero phases, and we look at the interplay between these electric and magnetic phases.

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Chemical Thermodynamics. By Frederick D. Rossini.

Cited by 6 publications

References 0 publications

A role for bacteriophages in the evolution and transfer of bacterial virulence determinants

A role for bacteriophages in the evolution and transfer of bacterial virulence determinants

Geometric Phases for Classical and Quantum Dynamics: Hannay Angle and Berry Phase for Loops on a Torus

The time-dependent Aharonov–Casher effect

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