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Walter Steurbaut

Bio: Walter Steurbaut is an academic researcher from Ghent University. The author has contributed to research in topics: Pesticide residue & Spray nozzle. The author has an hindex of 23, co-authored 105 publications receiving 4463 citations.


Papers
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TL;DR: The current review of 129 references describes the biological activity of several chitosan derivatives and the modes of action that have been postulated in the literature.

2,615 citations

01 Jan 2010
TL;DR: A meta-analysis of response ratios is presented as a possible method of combining and quantifying effects of food processing on pesticide residue levels, which indicated both reduction and increases for the 95% and 99.5% confidence intervals.
Abstract: Pesticides are widely used in food production to increase food security despite the fact that they can have negative health effects on consumers. Pesticide residues have been found in various fruits and vegetables; both raw and processed. One of the most common routes of pesticide exposure in consumers is via food consumption. Most foods are consumed after passing through various culinary and processing treatments. A few literature reviews have indicated the general trend of reduction or concentration of pesticide residues by certain methods of food processing for a particular active ingredient. However, no review has focused on combining the obtained results from different studies on different active ingredients with differences in experimental designs, analysts and analysis equipment. In this paper, we present a meta-analysis of response ratios as a possible method of combining and quantifying effects of food processing on pesticide residue levels. Reduction of residue levels was indicated by blanching, boiling, canning, frying, juicing, peeling and washing of fruits and vegetables with an average response ratio ranging from 0.10 to 0.82. Baking, boiling, canning and juicing indicated both reduction and increases for the 95% and 99.5% confidence intervals.

232 citations

Journal ArticleDOI
TL;DR: In this paper, a meta-analysis of response ratios was presented as a possible method of combining and quantifying effects of food processing on pesticide residue levels, which indicated that residue levels were indicated by blanching, boiling, canning, frying, juicing, peeling and washing of fruits and vegetables with an average response ratio ranging from 1 0 to 082.

219 citations

Journal ArticleDOI
TL;DR: Novel N,O-acyl chitosan (NOAC) derivatives were synthesized to examine their fungicidal activity against the gray mould fungus Botrytis cinerea and the rice leaf blast fungus Pyricularia oryzae and were more active against the two plant pathogens than chitOSan itself.

154 citations

Journal ArticleDOI
12 Jan 2011-PLOS ONE
TL;DR: The observed multiple-resistance coupled with the occurrence of high kdr frequency in populations of An.
Abstract: BACKGROUND: Indoor Residual Spraying (IRS), insecticide-treated nets (ITNs) and long-lasting insecticidal nets (LLINs) are key components in malaria prevention and control strategy. However, the development of resistance by mosquitoes to insecticides recommended for IRS and/or ITNs/LLINs would affect insecticide-based malaria vector control. We assessed the susceptibility levels of Anopheles arabiensis to insecticides used in malaria control, characterized basic mechanisms underlying resistance, and evaluated the role of public health use of insecticides in resistance selection. METHODOLOGY/PRINCIPAL FINDINGS: Susceptibility status of An. arabiensis was assessed using WHO bioassay tests to DDT, permethrin, deltamethrin, malathion and propoxur in Ethiopia from August to September 2009. Mosquito specimens were screened for knockdown resistance (kdr) and insensitive acetylcholinesterase (ace-1(R)) mutations using AS-PCR and PCR-RFLP, respectively. DDT residues level in soil from human dwellings and the surrounding environment were determined by Gas Chromatography with Electron Capture Detector. An. arabiensis was resistant to DDT, permethrin, deltamethrin and malathion, but susceptible to propoxur. The West African kdr allele was found in 280 specimens out of 284 with a frequency ranged from 95% to 100%. Ace-1(R) mutation was not detected in all specimens scored for the allele. Moreover, DDT residues were found in soil samples from human dwellings but not in the surrounding environment. CONCLUSION: The observed multiple-resistance coupled with the occurrence of high kdr frequency in populations of An. arabiensis could profoundly affect the malaria vector control programme in Ethiopia. This needs an urgent call for implementing rational resistance management strategies and integrated vector control intervention.

147 citations


Cited by
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Journal ArticleDOI
TL;DR: Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. S. Nagar, Punjab-160 062, India, Institute of Biochemistry, Faculty of Medicine, Polytechnic University, Via Ranieri 67, IT-60100 Ancona, Italy, and Department of Medicinal Chemistry & Natural Products,The Hebrew University of Jerusalem, School of Pharmacy-Faculty of medicine, Jerusalem 91120, Israel.
Abstract: Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar,Mohali, Punjab-160 062, India, Institute of Biochemistry, Faculty of Medicine, Polytechnic University, Via Ranieri 67, IT-60100 Ancona, Italy,Green Biotechnology Research Group, The Special Division for Human Life Technology, National Institute of Advanced Industrial Science andTechnology, 1-8-31 Midorigaoka, Ikeda, Osaka-563-8577, Japan, and Department of Medicinal Chemistry & Natural Products,The Hebrew University of Jerusalem, School of Pharmacy-Faculty of Medicine, Jerusalem 91120, IsraelReceived March 2, 2004

2,570 citations

Journal ArticleDOI
TL;DR: The paper reviews the current trend of investigation on antimicrobial activities of chitosan and its mode of action and different physical states are comparatively discussed.

2,260 citations

Journal ArticleDOI
TL;DR: The antimicrobial mechanisms of several nanoparticles are reviewed, their merits, limitations and applicability for water disinfection and biofouling control are discussed, and research needs to utilize novel nanomaterials for water treatment applications are highlighted.

2,108 citations

Journal ArticleDOI
TL;DR: This review summarizes emerging efforts in combating against infectious diseases, particularly using antimicrobial NPs and antibiotics delivery systems as new tools to tackle the current challenges in treating infectious diseases.

1,493 citations

Journal ArticleDOI
TL;DR: This article reviews the state of the art of antimicrobial polymers primarily since the last comprehensive review by one of the authors in 1996 and discusses the requirements of antim antibiotic polymers, factors affecting the antimicrobial activities, methods of synthesizing antimicrobialpolymers, major fields of applications, and future and perspectives in the field of antimicrobials.

1,434 citations