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J. Walter · SciRah

Researcher profile · Semantic Scholar

J. Walter

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J. Walter — researcher profile on SciRah

h-index: 38
Works: 121
Citations: 5,744

Most-cited papers

Pennate Diatom Nitzschia pungens as the Primary Source of Domoic Acid, a Toxin in Shellfish from Eastern Prince Edward Island, Canada
S. Bates, C. J. Bird, A. S. D. de Freitas, R. Foxall +13 more
1989652 citations
Semantic Scholar
Identification of domoic acid, a neuroexcitatory amino acid, in toxic mussels from eastern Prince Edward Island
J. L. Wright, R. Boyd, A. S. D. de Freitas, M. Falk +15 more
1989436 citations
Semantic Scholar
Quantitative 1H NMR with external standards: use in preparation of calibration solutions for algal toxins and other natural products.
I. Burton, M. Quilliam, J. Walter
2005Analytical Chemistry196 citations
Semantic Scholar
Spirolides B and D, two novel macrocycles isolated from the digestive glands of shellfish
T. Hu, J. Curtis, Y. Oshima, M. Quilliam +3 more
1996185 citations
Semantic Scholar
Characterization of spirolides a, c, and 13-desmethyl c, new marine toxins isolated from toxic plankton and contaminated shellfish.
T. Hu, I. Burton, A. Cembella, J. Curtis +3 more
2001Journal of Natural Products169 citations
Semantic Scholar
International NMR-based environmental metabolomics intercomparison exercise.
M. Viant, D. Bearden, J. G. Bundy, I. Burton +11 more
2009Environmental Science and Technology161 citations
Semantic Scholar
CHARACTERIZATION OF BIOLOGICALLY INACTIVE SPIROLIDES E AND F : IDENTIFICATION OF THE SPIROLIDE PHARMACOPHORE
T. Hu, J. Curtis, J. Walter, J. L. Wright
1996133 citations
Semantic Scholar
Three novel hydroxybenzoate saxitoxin analogues isolated from the dinoflagellate Gymnodinium catenatum.
A. Negri, D. Stirling, M. Quilliam, S. Blackburn +6 more
2003Chemical Research in Toxicology128 citations Open access
Semantic Scholar
New diol esters isolated from cultures of the dinoflagellates prorocentrum lima and prorocentrum concavum
T. Hu, J. Marr, A. S. D. de Freitas, Michael A. Quilliam +3 more
1992124 citations
Semantic Scholar
Interaction of domoic acid and several derivatives with kainic acid and AMPA binding sites in rat brain.
D. Hampson, Xi-Ping Huang, J. W. Wells, J. Walter +1 more
1992European Journal of Pharmacology119 citations
Semantic Scholar
Detection and identification of spirolides in norwegian shellfish and plankton.
J. Aasen, S. Mackinnon, Patricia Leblanc, J. Walter +3 more
2005Chemical Research in Toxicology113 citations
Semantic Scholar
Spirolides isolated from Danish strains of the toxigenic dinoflagellate Alexandrium ostenfeldii.
S. Mackinnon, J. Walter, M. Quilliam, A. Cembella +4 more
2006Journal of Natural Products109 citations
Semantic Scholar
Isolation and structure elucidation of new and unusual saxitoxin analogues from mussels.
C. Dell’Aversano, J. Walter, I. Burton, D. Stirling +2 more
2008Journal of Natural Products108 citations
Semantic Scholar
Isolation of a new diarrhetic shellfish poison from Irish mussels
T. Hu, J. Doyle, D. Jackson, J. Marr +5 more
1992106 citations
Semantic Scholar
Contribution of the type III secretion system (TTSS) to virulence of Aeromonas salmonicida subsp. salmonicida.
A. Dacanay, L. Knickle, Kirty S. Solanky, J. Boyd +4 more
2006Microbiology100 citations Open access
Semantic Scholar
Viscosin, a potent peptidolipid biosurfactant and phytopathogenic mediator produced by a pectolytic strain of Pseudomonas fluorescens
M. Laycock, P. Hildebrand, P. Thibault, J. Walter +1 more
199199 citations
Semantic Scholar
Identification of DTX-4, a new water-soluble phosphatase inhibitor from the toxic dinoflagellate Prorocentrum lima
T. Hu, J. Curtis, J. Walter, J. L. Wright
199597 citations
Semantic Scholar
Identification of isodomoic acid D and two new geometrical isomers of domoic acid in toxic mussels
J. L. Wright, M. Falk, A. Mcinnes, J. Walter
199095 citations
Semantic Scholar
Biosynthesis of DTX-4: Confirmation of a Polyketide Pathway, Proof of a Baeyer−Villiger Oxidation Step, and Evidence for an Unusual Carbon Deletion Process
J. Wright, T. Hu, J. Mclachlan, J. Needham +1 more
199691 citations
Semantic Scholar
Two new water-soluble dsp toxin derivatives from the dinoflagellate prorocentrum maculosum: possible storage and excretion products
T. Hu, J. Curtis, J. Walter, J. Mclachlan +1 more
199585 citations
Semantic Scholar
Isolation and structure of prorocentrolide B, a fast-acting toxin from Prorocentrum maculosum.
T. Hu, A. Defreitas, J. Curtis, Y. Oshima +2 more
1996Journal of Natural Products83 citations
Semantic Scholar
Jadomycin, a novel 8H-benz[b]oxazolo[3,2-f]phenanthridine antibiotic from from streptomyces venezuelae ISP5230.☆
S. Ayer, A. Mcinnes, P. Thibault, J. Walter +3 more
199173 citations
Semantic Scholar
Identification of pectenotoxin-11 as 34S-hydroxypectenotoxin-2, a new pectenotoxin analogue in the toxic dinoflagellate Dinophysis acuta from New Zealand.
Toshiyuki Suzuki, J. Walter, Patricia Leblanc, S. Mackinnon +8 more
2006Chemical Research in Toxicology60 citations
Semantic Scholar
Biosynthesis of 13-desmethyl spirolide C by the dinoflagellate Alexandrium ostenfeldii.
S. Mackinnon, A. Cembella, I. Burton, N. Lewis +2 more
2006Journal of Organic Chemistry56 citations
Semantic Scholar
Metabolic changes in Atlantic salmon exposed to Aeromonas salmonicida detected by 1H-nuclear magnetic resonance spectroscopy of plasma.
Kirty S. Solanky, I. Burton, S. Mackinnon, J. Walter +1 more
2005Diseases of Aquatic Organisms55 citations Open access
Semantic Scholar
Isolation and purification procedures for the preparation of paralytic shellfish poisoning toxin standards.
Maurice V. Laycock, Pierre Thibault, S. Ayer, J. Walter
1994Natural toxins (Print)55 citations
Semantic Scholar
1H-NMR and mass spectrometric characterization of the metabolic response of juvenile Atlantic salmon (Salmo salar) to long-term handling stress
T. Karakach, E. Huenupi, E. C. Soo, J. Walter +1 more
2009Metabolomics51 citations
Semantic Scholar
Characterization of the measurement error structure in 1D 1H NMR data for metabolomics studies.
T. Karakach, P. Wentzell, J. Walter
2009Analytica Chimica Acta49 citations
Semantic Scholar
Liquid seaweed extracts identified using 1H NMR profiles
J. Craigie, S. Mackinnon, J. Walter
2008Journal of Applied Phycology49 citations
Semantic Scholar
13C-NMR Regioisomeric Analysis of EPA and DHA in Fish Oil Derived Triacylglycerol Concentrates
E. Suárez, Paul F. Mugford, Alfred J. Rolle, I. Burton +2 more
201048 citations Open access
Semantic Scholar
Assignment of the relative stereochemistry of the spirolides, macrocyclic toxins isolated from shellfish and from the cultured dinoflagellate Alexandrium ostenfeldii
M. Falk, I. Burton, T. Hu, J. Walter +1 more
200147 citations
Semantic Scholar
Chemistry of the shellfish toxin domoic acid: characterization of related compounds
J. Walter, M. Falk, J. L. Wright
199445 citations
Semantic Scholar
Studies of the biosynthesis of DTX-5a and DTX-5b by the dinoflagellate Prorocentrum maculosum: regiospecificity of the putative Baeyer-Villigerase and insertion of a single amino acid in a polyketide chain.
G. Macpherson, I. Burton, Patricia Leblanc, J. Walter +1 more
2003Journal of Organic Chemistry44 citations Open access
Semantic Scholar
NMR metabolic analysis of samples using fuzzy K‐means clustering
M. Čuperlović-Culf, N. Belacel, A. Culf, I. Chute +4 more
2009Magnetic resonance in chemistry : MRC41 citations Open access
Semantic Scholar
Biosynthesis of the neurotoxin domoic acid by the marine diatom Nitzschia pungens forma multiseries, determined with [13C]-labelled precursors and nuclear magnetic resonance
D. J. Douglas, U. Ramsey, J. Walter, J. L. Wright
199241 citations
Semantic Scholar
The preparation of certified calibration solutions for azaspiracid-1, -2, and -3, potent marine biotoxins found in shellfish
Ruth A. Perez, Nils Rehmann, S. Crain, Patricia Leblanc +8 more
2010Analytical and Bioanalytical Chemistry37 citations Open access
Semantic Scholar
Biosynthesis of domoic acid by the diatom Pseudo-nitzschia multiseries.
Una P. Ramsey, D. J. Douglas, J. Walter, J. L. Wright
1998Natural toxins (Print)37 citations
Semantic Scholar
Molecular modelling and NMR studies of the caffeine dimer
M. Falk, Warren Chew, J. Walter, W. Kwiatkowski +2 more
199837 citations
Semantic Scholar
NMR study of the protonation of domoic acid
J. Walter, D. Leek, M. Falk
199237 citations
Semantic Scholar
Biosynthetic studies of the DSP toxin DTX-4 and an okadaic acid diol ester
J. Needham, T. Hu, J. Mclachlan, J. Walter +1 more
199535 citations
Semantic Scholar
Isolation of new isocyanide metabolites of Trichoderma hamatum as their (η5-pentamethylcyclopentadienyl)- or (η5-ethyltetramethylcyclopentadienyl)-di-µ-thiocyanato-rhodium complexes
R. Boyd, A. Mcalees, A. Taylor, J. Walter
199134 citations
Semantic Scholar
Sulfated diesters of okadaic acid and DTX-1: Self-protective precursors of diarrhetic shellfish poisoning (DSP) toxins.
T. Hu, Patricia Leblanc, I. Burton, J. Walter +4 more
2017Harmful Algae33 citations
Semantic Scholar
Ginkgolide and bilobalide biosynthesis in Ginkgo biloba. I : Sites of synthesis, translocation and accumulation of ginkgolides and bilobalide
A. Cartayrade, É. Neau, C. Sohier, J. Balz +2 more
199733 citations
Semantic Scholar
Sulfoquinovosyl diacylglycerols from the alga Heterosigma carterae
M. Keusgen, J. Curtis, P. Thibault, J. Walter +2 more
1997Lipids31 citations
Semantic Scholar
Use of 13C in biosynthetic studies. The labeling pattern in dihydrofusarubin enriched from [13C]- and [13C, 2H]acetate in cultures of Fusarium solani
I. Kurobane, L. Vining, A. Mcinnes, J. Walter
198031 citations Open access
Semantic Scholar
Analysis of time course 1H NMR metabolomics data by multivariate curve resolution
Tobias K. Karakach, R. Knight, E. Lenz, M. Viant +1 more
2009Magnetic resonance in chemistry : MRC30 citations
Semantic Scholar
Further studies on the biosynthesis of the boron-containing antibiotic aplasmomycin
J. Lee, P. Dewick, C. P. Gorst-Allman, F. Spreafico +6 more
198729 citations
Semantic Scholar
Solubility of domoic acid in water and in non-aqueous solvents
M. Falk, Ping-Se F. To, J. Walter
199128 citations Open access
Semantic Scholar
Biosynthetic origin of C-37 and C-38 in the polyether toxins okadaic acid and dinophysistoxin-1
J. Needham, J. Mclachlan, J. Walter, J. L. Wright
199427 citations
Semantic Scholar
The high molecular weight polyphloroglucinols of the marine brown alga Fucusvesiculosus L. 1H and 13C nuclear magnetic resonance spectroscopy
A. Mcinnes, M. Ragan, Donald G. Smith, J. Walter
198527 citations
Semantic Scholar

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