J. J. R. Macleod

Allan, Frank N.

doi:10.2337/diab.4.6.491

Cited by 4 publications

(3 citation statements)

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“…This decrease in PA degradation is probably due to complex formation between cobalt and the acid, and the results show that a photolytic process alone cannot be used to destroy the organic species in the presence of the metal ions and in the absence of a catalyst. The cobalt complex with phthalic acid, [Co(C8H4O4)]H2O, is known to be stable (18), and any complex formation must alter the susceptibility of the organic molecule to photolytic degradation, for example in Mn-EDTA complexes (19). Both optical and infrared spectroscopic data show that there is an interaction between cobalt and PA; we interpret the changes in the efficiency of the destruction of the organic molecules in the presence of cobalt to the effects of these interactions on the bond systems responsible for the photolytic absorption.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Recovery of Metals and Destruction of Organic Species: Cobalt and Phthalic Acid

Grimes

Donaldson

Chaudhary

et al. 2000

Environ. Sci. Technol.

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In mixed industrial effluent, the presence of metal ions can retard the destruction of organic contaminants, and the efficiency of recovery of the metal is reduced by the presence of organic species. Results are presented for cobalt−phthalic acid in which both those effects occur. An electrochemical cell alone can be used to recover cobalt at pH 4.5 but is not capable of achieving complete mineralization of phthalic acid by anodic oxidation. A photolytic cell alone can achieve the destruction of phthalic acid at an optimum pH of 2.5 but leaves the metal ions in solution. A combined photolytic−electrochemical system using an activated carbon concentrator cathode is described that achieves the rapid simultaneous pH-independent destruction of phthalic acid and recovery of cobalt.

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Section: Resultsmentioning

confidence: 99%

Simultaneous Recovery of Metals and Destruction of Organic Species: Cobalt and Phthalic Acid

Grimes

Donaldson

Chaudhary

et al. 2000

Environ. Sci. Technol.

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“…It was postulated that TlTP adopts a centrosymmetric phase which is paraelectric and closely related to the high-temperature phase. Recently, we have conducted a preliminary high-pressure structural study of the sodium-doped material Na 0.3 K 0.7 TiOPO 4 (NaKTP) and have found that it adopts the same, though more distorted, high-pressure structure as KTP through an isosymmetric transition between 5.2 GPa and 5.9 GPa [43]. As there is a large difference between the atomic masses and atomic volumes of Tl, K and Na, it is rather remarkable that the phase transition pressures should be so similar and this suggests that the framework may play the more dominant role at the transition.…”

Section: Discussionmentioning

confidence: 99%

The structural pressure dependence of potassium titanyl phosphate (KTP) to 8 GPa

Allan¹,

Nelmes²

1996

J. Phys.: Condens. Matter

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The crystal structure of (KTP) has been determined as a function of pressure to 8 GPa at ambient temperature, using single-crystal x-ray diffraction techniques. The first-order isosymmetric phase transition, at 5.8 GPa, appears to have a strong effect on the compression mechanism of the structure: in the low-pressure phase the structure compresses by polyhedral tilting within the cross-linking chains while in the high-pressure phase relative translations and rotations of the chains themselves account for a significant proportion of the unit-cell volume reduction both at the transition and on further pressure increase. The distortion of the framework at the phase transition is accompanied by relatively large displacements of the potassium atoms to positions more closely related to the Pnan symmetry of the high-temperature phase. A comparison of the pressure-induced changes of the highly distorted octahedra with recent high-pressure optical measurements indicates that neither the lengths nor the orientations of the Ti - O bonds correlate, at least directly, with the observed variation of the second-harmonic-generating (SHG) power of the crystal. This strongly suggests that other regions of the structure may be important for the SHG properties. .

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“…Giant Canada geese have undergone a phenomenal population increase from only a few thousand in 1965 in all of North America (Hanson 1965) to an estimated 1.1 million in just the central U.S. in 1996 (Wood et al 1996). This growth rate is not peculiar to North America; in Britain there has been an estimated 8 % annual increase in numbers of Canada geese from 1976 to 1991 (Allan et al 1995). Although a few geese may be desirable in a park, suburban pond, or backyard, such small populations increase rapidly and usually lead to problems which can be very difficult to control.…”

Section: Introductionmentioning

confidence: 99%

A techniques manual and video for the management of problem urban Canada geese

Smith¹,

Craven²,

Curtis³

1998

vertebrate_pest_conference

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Social and management problems associated with urban Canada geese (Branta canadensis) are increasing in area, scope and magnitude. Although there are many articles on the management of urban Canada geese, none provide enough information for a reader to understand the impact geese have on different people, the ecology of the urban goose, evaluate the effectiveness of potential control options, choose appropriate management techniques, and then implement the chosen techniques. The authors present a manual and video, which in combination, they believe are not deficient in any of these areas. The video is intended to increase the awareness and knowledge of human/goose conflicts in urban and suburban environments. The manual covers the biology of Canada geese relevant to problem management in an urban setting and a comprehensive list of management techniques. Detailed instructions for implementation, permit requirements, sources of equipment and supplies, and a discussion of advantages, disadvantages, and characteristics, are included for each technique. To assist in choosing and locating appropriate techniques, quick reference summary tables are included.

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J. J. R. Macleod

Cited by 4 publications

References 0 publications

Simultaneous Recovery of Metals and Destruction of Organic Species: Cobalt and Phthalic Acid

Simultaneous Recovery of Metals and Destruction of Organic Species: Cobalt and Phthalic Acid

The structural pressure dependence of potassium titanyl phosphate (KTP) to 8 GPa

A techniques manual and video for the management of problem urban Canada geese

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