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Journal of Applied Biotechnology
Number of Followers: 2

This is an Open Access Journal

Open Access journal
ISSN (Print) 2327-0640
Published by Macrothink Institute

[47 journals]

Research on the Physico-Chemical Properties of Soils Locality
Dobrosloveni, Olt County for Sustainable Agriculture
- Authors: Anca-Luiza Stănilă
  Abstract: The studied territory located in the central-western part of Olt County, belongs to the Caracal Plain and extremely little in the Leu-Rotunda Field in the SW part, both as divisions of the Romanati Plain.Locality presents a predominant relief of plain low altitude that is characterized by alluvio-proluvial plains moderately fragmented with local terraces, covered with loess-like deposit but relief of saucer.The soil cover of the territory under study is the direct reflection of all environmental factors, each having a role in the pedogenetic processes. Climate, as a pedogenetic factor, acted by its components, namely: temperature, precipitation, evapotranspiration, global radiation.Forest steppe vegetation was the supply of organic matter and biomass, because the hydrological regime is deficient, but especially the lithological substrate (loess-like complex) to steer solification to types characteristic of the cernisols class.Under the influence of environmental factors and pedogenetic processes within the locality Dobrosloveni it formed a wide range of soils, namely: protisols, cernisols, luvisols and hydrisols.
  PubDate: Mon, 01 Nov 2021 00:00:00 -070
Phytochemical Screening and in Vitro Evaluation of the Antibacterial
Activity of Organic Extracts from the Root Bark of Cussonia arborea
(Araliaceae)
- Authors: Luciane Marlyse Moungang; Lazare Sidjui Sidjui, Hervé Narcisse Bayaga, Josséline Ndambedia Mfouapon, Ondoua Nguélé, Hortense Kamga Gonsu, Bathélemy Ngameni
  Abstract: Objective: To assess the usefulness of Cussonia arborea in the treatment of bacterial infectious diseases.Study Design: Experimental analytical study.Place and Duration of Study: The study was done in the Laboratory of Hydrobiology and Environment of the Faculty of Sciences, University of Yaounde1; the Bacteriology Laboratory of the Yaoundé University Teaching Hospital; the Laboratory of Pharmacognosy and Pharmaceutical Chemistry of the Faculty of Medicine and Biomedical Sciences and the Laboratory of Organic Chemistry of the Faculty of Sciences of the University of Yaoundé I. The study was done in a period of six months.Methodology: The root bark of Cussonia arborea was collected in the village Yambéta (Central Region, Cameroon), dried and pulverized. Thereafter, two extractions were performed by embedding 200 g of powder in 2000 mL of 96° ethanol, and in a hydro-ethanolic mixture (30/70, v/v), respectively. Qualitative phytochemical screening was performed. Minimum inhibitory and bacterial toxicity were determined by macro-dilution in liquid medium on Staphylococcus aureus, Salmonella sp, Shigella sp and Proteus mirabilis provided by the Laboratory of Hydrobiology and Environment of the Faculty of Sciences, University of Yaounde1 and the Bacteriology Laboratory of the Yaoundé University Teaching Hospital.Results: Phytochemical screening revealed the presence of polyphenols (flavonoids, and tannins), alkaloids, quinones, saponins and, cardiac glycosides. However, coumarins were absent in the two extracts. The minimum inhibitory concentrations of the extracts ranged from 25 to 100 mg/mL, and the minimum bactericidal concentrations from 25 to 200 mg/mL. The ethanolic extract was bactericidal against Proteus mirabilis and Staphylococcus aureus, but bacteriostatic against Salmonella sp and Shigella sp. The hydro-ethanolic extract was bacteriostatic against Shigella sp and bactericidal against the other strains.Conclusion: The groups of polyphenols, alkaloids, quinones, saponins and, cardiac glycosides contained in the two extracts can justify the antibacterial activity observed against Staphylococcus aureus, Salmonella sp, Shigella sp and Proteus mirabilis.
  PubDate: Sat, 16 Oct 2021 00:00:00 -070

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