The aim of this study was to characterize polypeptide components of the capture net spun by trich... more The aim of this study was to characterize polypeptide components of the capture net spun by trichopteran larvaeHydropsyche slossonae(Banks) (Trichoptera: Hydropsychidae). Thirty-one polypeptide bands were identified by SDS – polyacrylamide gel electrophoresis (SDS–PAGE) from extracted net material, with molecular weights ranging from 8500 to 179 000. Comparison with published data onBombyx mori(L.) (Lepidoptera: Bombycidae) silk, treated under similar denaturing conditions, shows that six low molecular weight polypeptides ranging between 8500 and 18 800 in the silk ofH.slossonaeare absent from that ofB.mori; furthermore, two high molecular weight polypeptides (210 000 and 220 000) detected in the silk ofB.moriare not present in that ofH.slossonae. Differences between both groups are probably related to their mode of living and to the specific use of silk (in air versus under water). Our findings are consistent with the current trend in the literature that silk spun by aquatic and terrestrial insects, as well as those spun by different species, is apparently made of different biopolymers according to the protein constituents. Hence, the polypeptide characterization of silk, combined with sequence data and (or) antibodies cross-reactivity data, could represent a potential tool for taxonomic classification improvement of aquatic insects. These results could eventually be used to characterize hydropsychid capture net anomalies induced by environmental pollution.
In this study, laboratory wastewater containing organic matters, heavy metals and aromatic compou... more In this study, laboratory wastewater containing organic matters, heavy metals and aromatic compounds, was treated by vetiver grass (Vetiveria zizanioides) as a phytoremediation method to remove th ...
The challenges of keeping floodplains and wetlands in rapidly growing cities : lessons learnt fro... more The challenges of keeping floodplains and wetlands in rapidly growing cities : lessons learnt from 24 years of observing Vientiane, Lao PDR
The effects of fenvalerate exposure on the net-spinning behaviour of Hydropsyche siltalai were ex... more The effects of fenvalerate exposure on the net-spinning behaviour of Hydropsyche siltalai were examined in a laboratory study. The larvae were exposed to nominal pulse-doses of 0.25 and 0.5 μg fenvalerate l-1. Nets were collected and examined for anomalies after four days of exposure to fenvalerate. Additional nets were collected after another four day of exposure. The fenvalerate dissipated rapidly
An experiment in >1000 river and riparian sites found spatial patterns and controls of carbon ... more An experiment in >1000 river and riparian sites found spatial patterns and controls of carbon processing at the global scale.
The application of hydroinformatics tools is restricted in developing countries due to the non-av... more The application of hydroinformatics tools is restricted in developing countries due to the non-availability of the required data and information under local conditions. This paper presents the state of water quality of the city of Vientiane (capital of Lao PDR) before the extensive rectification of its drainage network and describes an approach and methodology for water quality modeling. This is done with respect to the application of a combined hydrodynamic/water quality model based on minimal input data and observations for model verification. It further evaluates options to improve the deteriorating water quality observed in the rectified channels associated with the absence of suitable wastewater treatment. Two pollutants associated with the enrichment of receiving water bodies by wastewaters, total-P and NH4-N, are modeled. The modelling study is carried out in three steps: dry weather flow simulation, wet weather flow simulation and nutrient modeling using MOUSE. The dry weath...
The aim of this study was to characterize polypeptide components of the capture net spun by trich... more The aim of this study was to characterize polypeptide components of the capture net spun by trichopteran larvaeHydropsyche slossonae(Banks) (Trichoptera: Hydropsychidae). Thirty-one polypeptide bands were identified by SDS – polyacrylamide gel electrophoresis (SDS–PAGE) from extracted net material, with molecular weights ranging from 8500 to 179 000. Comparison with published data onBombyx mori(L.) (Lepidoptera: Bombycidae) silk, treated under similar denaturing conditions, shows that six low molecular weight polypeptides ranging between 8500 and 18 800 in the silk ofH.slossonaeare absent from that ofB.mori; furthermore, two high molecular weight polypeptides (210 000 and 220 000) detected in the silk ofB.moriare not present in that ofH.slossonae. Differences between both groups are probably related to their mode of living and to the specific use of silk (in air versus under water). Our findings are consistent with the current trend in the literature that silk spun by aquatic and terrestrial insects, as well as those spun by different species, is apparently made of different biopolymers according to the protein constituents. Hence, the polypeptide characterization of silk, combined with sequence data and (or) antibodies cross-reactivity data, could represent a potential tool for taxonomic classification improvement of aquatic insects. These results could eventually be used to characterize hydropsychid capture net anomalies induced by environmental pollution.
In this study, laboratory wastewater containing organic matters, heavy metals and aromatic compou... more In this study, laboratory wastewater containing organic matters, heavy metals and aromatic compounds, was treated by vetiver grass (Vetiveria zizanioides) as a phytoremediation method to remove th ...
The challenges of keeping floodplains and wetlands in rapidly growing cities : lessons learnt fro... more The challenges of keeping floodplains and wetlands in rapidly growing cities : lessons learnt from 24 years of observing Vientiane, Lao PDR
The effects of fenvalerate exposure on the net-spinning behaviour of Hydropsyche siltalai were ex... more The effects of fenvalerate exposure on the net-spinning behaviour of Hydropsyche siltalai were examined in a laboratory study. The larvae were exposed to nominal pulse-doses of 0.25 and 0.5 μg fenvalerate l-1. Nets were collected and examined for anomalies after four days of exposure to fenvalerate. Additional nets were collected after another four day of exposure. The fenvalerate dissipated rapidly
An experiment in >1000 river and riparian sites found spatial patterns and controls of carbon ... more An experiment in >1000 river and riparian sites found spatial patterns and controls of carbon processing at the global scale.
The application of hydroinformatics tools is restricted in developing countries due to the non-av... more The application of hydroinformatics tools is restricted in developing countries due to the non-availability of the required data and information under local conditions. This paper presents the state of water quality of the city of Vientiane (capital of Lao PDR) before the extensive rectification of its drainage network and describes an approach and methodology for water quality modeling. This is done with respect to the application of a combined hydrodynamic/water quality model based on minimal input data and observations for model verification. It further evaluates options to improve the deteriorating water quality observed in the rectified channels associated with the absence of suitable wastewater treatment. Two pollutants associated with the enrichment of receiving water bodies by wastewaters, total-P and NH4-N, are modeled. The modelling study is carried out in three steps: dry weather flow simulation, wet weather flow simulation and nutrient modeling using MOUSE. The dry weath...
Uploads
Papers by Lena Vought