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Bioactive Compounds from Plants: Extraction and Characterization

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Natural Products Chemistry".

Deadline for manuscript submissions: closed (15 April 2023) | Viewed by 1900

Special Issue Editors


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Guest Editor
Department of Biochemistry, Microbiology and Biotechnology, Faculty of Science and Agriculture, University of Limpopo, Sovenga, South Africa
Interests: extraction; compounds; antimicrobial; cytotoxic effects; anti-inflammatory; medicinal plants

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Guest Editor
Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
Interests: medicinal plants; type II diabetes

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Guest Editor
Department of Biotechnology. University of Johannesburg, Johannesburg, South Africa
Interests: tuberculosis; drug discovery; molecular epidemiology and molecular pathogenesis of disease causing microorganisms; brucellosis; staphylococcus aureus pathogenesis

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Guest Editor
Department of Pharmacy, University of Limpopo, Sovenga, South Africa
Interests: anti-cancer and antimicrobial agents from medicinal plants

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Guest Editor
Department of Biochemistry, Sefako Makgatho Health Sciences University, Pretoria, South Africa
Interests: medicinal plants

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Guest Editor
Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
Interests: antimicrobial drugs

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Guest Editor
Department of Chemical and Forensic Science, Botswana International University of Science and Technology, Palapye, Botswana
Interests: organic chemistry

Special Issue Information

Dear Colleagues,

Natural products, such as plants extract, either as pure compounds or as standardized extracts, provide unlimited opportunities for new drug discoveries because of the unmatched availability of chemical diversity. Plants used for traditional medicine contain a wide range of substances that can be used to treat chronic as well as infectious diseases. Due to the development of adverse effects and microbial resistance to chemically synthesized drugs, scientists have turned to ethnopharmacognosy.

The premier steps to utilize biologically active compounds from plant resources are: extraction; pharmacological screening; isolation; characterization of the bioactive compound; toxicological evaluation; and clinical evaluation. Characteristically, bioactive compounds remain together with other compounds present in plants. Bioactive compounds can be identified and characterized from various plant parts such as the leaves, stem, flower and fruit. It is only possible to conduct further separation, identification, and characterization of bioactive compounds followed by an appropriate extraction process. Different extraction techniques should be used in diverse conditions to understand the extraction selectivity of various natural sources.

This Special Issue aims to gather scientific papers on molecules derived from natural products that have pharmacological activities. The focus of the papers must be on the analytical methodologies, including the extraction, isolation and characterization of active ingredients in extract preparations. To date, numerous bioactive compounds have been discovered. These compounds vary widely in chemical structure and function and are grouped accordingly. Bioactive compounds may naturally be found in plants. Most bioactive compounds have antioxidant, anticarcinogenic, anti-inflammatory, and antimicrobial properties. Studies highlighting the common problems and key challenges in the extraction, isolation and characterization of active ingredients in plant preparations will be given preference.

Prof. Dr. Peter Masoko
Prof. Dr. Leshweni Jeremiah Shai
Prof. Dr. Ezekiel Green
Dr. Ladislaus Kakore Mdee
Dr. Stanley Gololo
Dr. Olihile Sebolai
Dr. Ofentse Mazimba
Guest Editors

Manuscript Submission Information

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Keywords

  • biological activities
  • extraction methods
  • isolation
  • phytochemical characterization
  • medicinal plants
  • ethnobotany

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Published Papers (1 paper)

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Research

15 pages, 1139 KiB  
Article
Comparison of Identification and Quantification of Polyphenolic Compounds in Skins and Seeds of Four Grape Varieties
by Zlatina Chengolova, Yavor Ivanov and Tzonka Godjevargova
Molecules 2023, 28(10), 4061; https://doi.org/10.3390/molecules28104061 - 12 May 2023
Cited by 5 | Viewed by 1511
Abstract
The aim of this study was to identify and quantify polyphenolic compounds in skin extracts from four Bulgarian grape varieties and compare them to those of seed extracts. The values of total phenolic contents, flavonoids, anthocyanins, procyanidins and an ascorbic acid in grape [...] Read more.
The aim of this study was to identify and quantify polyphenolic compounds in skin extracts from four Bulgarian grape varieties and compare them to those of seed extracts. The values of total phenolic contents, flavonoids, anthocyanins, procyanidins and an ascorbic acid in grape skin extracts were determined. The antioxidant capacities of skin extracts were evaluated using four different methods. The total phenolic content of skin extracts was 2–3 times lower than those of seed extracts. The significant difference between total parameter values of individual grape varieties were also found. According to the total phenolic content and antioxidant capacity of skin extracts, the different grape varieties were arranged in the following order: Marselan ≥ Pinot Noir ˃ Cabernet Sauvignon ˃ Tamyanka. The individual compounds in the grape skin extracts were determined using RP-HPLC and compared with those of the seed extracts. The determined composition of skin extracts was significantly different from the seed extracts’ composition. Quantitative evaluation of the procyanidins and catechins in the skins was carried out. A correlation between phenolic contents, individual compounds and antioxidant capacity of different extracts was found. The studied grape extracts have a potential to be applied as natural antioxidants in the pharmaceutical and food industries. Full article
(This article belongs to the Special Issue Bioactive Compounds from Plants: Extraction and Characterization)
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