scholarly journals Effects of aqueous effluents from in situ fossil-fuel processing technologies on aquatic systems

1978 ◽  
Author(s):  
H.L. Bergman
Keyword(s):  
Fossil Fuel ◽  
Aquatic Systems ◽  
Fuel Processing ◽  
Processing Technologies ◽  
Aqueous Effluents

Active bio-monitoring of contamination in aquatic systems—An in situ translocation experiment applying the PICT concept

2011 ◽  
Vol 101 (1) ◽  
pp. 228-236 ◽  
Author(s):  
Stefanie Rotter ◽  
Frédéric Sans-Piché ◽  
Georg Streck ◽  
Rolf Altenburger ◽  
Mechthild Schmitt-Jansen
Keyword(s):  
Aquatic Systems ◽  
Translocation Experiment ◽  
Bio Monitoring

Low Temperature Device Processing Technology for II-VI Semiconductors

1989 ◽  
Vol 161 ◽  
Author(s):  
D.L. Dreifus ◽  
R.M. Kolbas ◽  
B.P. Sneed ◽  
J.F. Schetzina
Keyword(s):  
Low Temperature ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Epitaxial Layers ◽  
Processing Technologies ◽  
Device Processing ◽  
Device Structures ◽  
Lift Off ◽  
Processing Steps

ABSTRACTLow temperature (<60° C) processing technologies that avoid potentially damaging processing steps have been developed for devices fabricated from II-VI semiconductor epitaxial layers grown by photoassisted molecular beam epitaxy (MBE). These low temperature technologies include: 1) photolithography (1 µm geometries), 2) calibrated etchants (rates as low as 30 Å/s), 3) a metallization lift-off process employing a photoresist profiler, 4) an interlevel metal dielectric, and 5) an insulator technology for metal-insulator-semiconductor (MIS) structures. A number of first demonstration devices including field-effect transistors and p-n junctions have been fabricated from II-VI epitaxial layers grown by photoassisted MBE and processed using the technology described here. In this paper, two advanced device structures, processed at <60° C, will be presented: 1) CdTe:As-CdTe:In p-n junction detectors, grown in situ by photoassisted MBE, and 2) HgCdTe-HgTe-CdZnTe quantum-well modulation-doped field-effect transistors (MODFETs).

In situ measurement of perfluoroalkyl substances in aquatic systems using diffusive gradients in thin-films technique

2018 ◽  
Vol 144 ◽  
pp. 162-171 ◽  
Author(s):  
Dong-Xing Guan ◽  
Ya-Qing Li ◽  
Nan-Yang Yu ◽  
Guang-Hui Yu ◽  
Si Wei ◽  
...  
Keyword(s):  
Thin Films ◽  
In Situ Measurement ◽  
Aquatic Systems ◽  
Perfluoroalkyl Substances ◽  
Diffusive Gradients

scholarly journals Sediment underneath charophyte meadows is enriched in viable ephippia and enhances the benthic periphytic biofilm

Hydrobiologia ◽  
2021 ◽  
Author(s):  
María A. Rodrigo ◽  
Eric Puche ◽  
Matilde Segura ◽  
Adriana Arnal ◽  
Carmen Rojo
Keyword(s):  
Surficial Sediment ◽  
Aquatic Systems ◽  
Habitat Conservation ◽  
Design Experiment ◽  
Diverse Community ◽  
Sediment Layers ◽  
Periphytic Biofilm ◽  
Factorial Design Experiment ◽  
Outdoor Mesocosms

AbstractWe contribute to the knowledge of charophyte meadows as key components of aquatic systems by analysing how they affect wetland sediments. We performed a factorial-design experiment with limnocorrals (outdoor mesocosms) in a Mediterranean protected wetland with presence or absence of charophytes [Chara vulgaris (CV) and Chara hispida (CH), planted from cultures or recruited in situ from germination of their fructifications]. The first 1 cm-surficial and 2 cm-bottom sediment layers were analysed for cladoceran ephippia, ostracods valves, benthic community of bacteria and periphytic biofilm, and charophyte fructifications. In the surficial sediment, the ephippia density was fourfold higher in the conditions with charophytes than in sites with no-charophytes and higher apparent viability was found. The surficial sediment periphyton biofilm was composed mainly of diatoms, with tenfold higher biomass underneath charophytes, and a much diverse community. The specific microhabitat generated by each charophyte species was reflected in the different abundances and relationships between the analysed components, firstly establishing a divergence with the sediment without meadows and, secondly, a distinction between the meadows of CH and CV that exhibit particular morphology-architecture, might exudate different metabolites and might have different allelopathic capacities over microalgae and microinvertebrates. Thus, the charophyte–sediment tandem is relevant for biodiversity and habitat conservation.

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