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Hydraulic Installation for Water Aeration

Journal of Mechanics Engineering and Automation 2013年第3期3卷 141-145页

作者： Adrian Ciocanea sanda Budea andrei Dragomirescu Department of Hydraulics Hydraulic Machinery and Environmental Engineering University Politehnica of Bucharest Bucharest060402 Romania

This paper presents some problems related to water quality and the condition of lakes in Romania, as well as methods for improving the quantity of oxygen dissolved in water. A method for water aeration and the installation used to implement it are described and the associated advantages regarding the reduction in the level of eutrophication are highlighted. The hydraulic installation for improving the quality of water from lakes, basins, reservoirs or slow flowing rivers was designed and tested in our hydraulics laboratory during a research project. It is floatable, environmentally friendly, and energetically autonomous, being powered by photovoltaic panels, which together with rechargeable batteries can assure a continuous operation. This installation could also be used in early stages of wastewater treatment. Experimental results regarding the performance curves of the hydraulic installation are also presented.

关键词： Eutrophication water aeration GPS (global position system) monitoring.

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LC-MS Phytochemical Profiles of Phenolic Compounds and Antimicrobial, Antioxidant, and Antiplasmodial Activities of Ethanol Extracts of Pycnostachys erici-rosenii *** and Leucas martinicensis (Jack.) *** (Lamiaceae)

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Advances in Biological Chemistry 2023年第6期13卷 209-227页

作者： Uwikunda Serondo Héritier Nizigiyimana Libérata Pius Tshimankinda Mpiana Nyamangyoku Ishibwela Obedi Ngezahayo Jérémie Dan Cristian Vodnar Daniela Hanganu Ioana Matei sanda andrei Department of Chemistry Faculty of Sciences Institut Supérieur Pédagogique de Bukavu Bukavu Democratic Republic of Congo Centre de Recherche en Sciences Naturelles et de l’Environnement (CRSNE) Faculté des Sciences Université du Burundi Bujumbura Burundi Department of Preclinical Sciences Faculty of Veterinary Medicine University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Cluj-Napoca Romania Ecole Doctorale de l’Université du Burundi Bujumbura Burundi Department of Chemistry Faculty of Sciences Université de Kinshasa Kinshasa Democratic Republic of Congo Faculty of Agriculture Université Catholique de Bukavu Bukavu Democratic Republic of Congo Department of Food Science Faculty of Food Science and Technology University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Cluj-Napoca Romania Department of Pharmacognosy Faculty of Pharmacy University of Medicine and Pharmacy “Iuliu Hatieganu” Cluj-Napoca Romania Department of Microbiology Mycology and Immunology Faculty of Veterinary Medicine University of Agricultural Science and Veterinary Medicine Cluj-Napoca Romania

This study has been conducted to analyze the chemical composition and antimicrobial, antioxidant and antiplasmodial properties of ethanol extracts of Pycnostachys erici-rosenii *** and Leucas martinicensis (Jack.) *** that are not yet well known. The HPLC-DAD-MS-ESI+ method was used to investigate the chemical profile, the disc diffusion and microdilution method for the antimicrobial activities, the DPPH and FRAP assays for antioxidant property and SYBR Green I-based growth inhibition assay on Pf 3D7 (CQ-sensitive) strain for antiplasmodial properties. The results indicated significant amounts of hydroxybenzoic acid, flavonol and hydroxycinnamic acid in the two species. The total polyphenols analysis gave 209.0 ± 16.1 mg GAE/100g DW for P. erici-rosenii and 175.3 ± 1.6 mg GAE/100g DW for L. martinicensis while for total flavonoids analysis 33.4 ± 1.8 mg TE/100g DW was found for P. erici-rosenii and 39.6 ± 0.6 mg TE/100g DW for L. martinicensis. Moreover, antimicrobial tests revealed 0.125 mg/mL on E. faecalis ATCC25922 for ethanol extracts P. erici-rosenii and L. martinicensis. The antioxidant assays revealed IC50 56.17 μg/mL and 78.43 μg/mL for DPPH assay, and 112.03 μM TE/100mL and 90.46 μM TE/100mL) for FRAP assay for ethanol extracts of P. erici-rosenii and L. martinicensis respectively. Finally, for Antiplasmodial activity, IC50 was 4.07 μg/mL for P. erici-rosenii and 12.29 μg/mL for L. martinicensis. Therefore, the antimicrobial, the antioxidant, and the antiplasmodial results suggest that the ethanolic extracts of the aerial parts of P. erici-rosenii and L. martinicensis contain compounds with antimicrobial, antioxidant, and antiplasmodial properties, which can be searched in new drug discovery for treatment of infectious diseases.

关键词： Pycnostachys erici-rosenii Leucas martinicensis Phytochemical Profile Antimicrobial Activity Antioxidant Activity Antiplasmodial Activity

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