Autor: Esmaeili, Akbar - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Biological activities and chemical composition of solvent extracts of Stoechospermum marginatum (C. Agardh)
Autorzy:: Esmaeili, Akbar
Khakpoor, Marjan
Powiązania:: https://bibliotekanauki.pl/articles/1039656.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: brown seaweed
antibacterial activity
Stoechospermum marginatum
extract
antioxidant activity
Opis:: The objective of this study was to evaluate the chemical composition CH3OH-CH2Cl2 (1:1) extract and biological activities of various extracts derived from the aerial parts of the brown marine alga Stoechospermum marginatum (C. Agardh). Gas chromatography (GC) and gas chromatography-mass spectroscopy (GC-MS) were used to analyze the composition of the essential oil. Total phenolics assay demonstrated a high value in hexane extract (HE), with a lower value for chloroform extract (CE), and the lowest value for methanol extract (ME). DPPH (2,2-diphenyl-1-picrylhydrazyl) assay showed that extracts of S. marginatum possess radical scavenging activity (RSA). Tests of the antioxidant property of the extracts revealed both electron and hydrogen transfer mechanisms. The antibacterial activity of the ME, CE, and HE as well as an ethanol extract was estimated against seven Gram-positive and Gram-negative bacteria. The ethanol extract showed the highest antibacterial activity, and the HE showed the lowest.
Źródło:: Acta Biochimica Polonica; 2012, 59, 4; 581-585
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Microbial transformation of citral by Penicillium sp.
Autorzy:: Esmaeili, Akbar
Tavassoli, Afsaneh
Powiązania:: https://bibliotekanauki.pl/articles/1040364.pdf
Data publikacji:: 2010
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: Penicillium sp.
biotransformation
thymol
bioconversion
geranial
fungi
Opis:: Thymol is present in the essential oils from herbs and spices, such as thyme. It is produced by these plant species as a chemical defense against phytopathogenic microorganisms. Therefore, this compound has attracted great attention in food industry, i.e., it has been used as a natural preservative in foods such as cheese to prevent fungal growth. Previous studies concerning the biotransformation of nerol by Penicillium sp. and microbial transformation of citral by sporulated surface cultures method (SSCM) of Penicillium digitatum have been reported. The objective of this research was to study the pathway involved during biotransformation of citral by Penicillium sp. using two methods. The culture preparation was done using different microbial methods and incubation periods to obtain Penicillium for citral biotransformation. The biotransformation products were identified by gas chromatography (GC) and gas chromatography/mass spectroscopy (GC/MS). A comparison of the two methods showed that SSCM was more effective, its major products were thymol (21.5%), geranial (18.6%) and nerol (13.7%). LM produced only one compound - thymol - with a low efficiency.
Źródło:: Acta Biochimica Polonica; 2010, 57, 3; 265-268
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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