Characterization of recycled resins with aminophosphonic groups for a future antimicrobial test

This article describes analysis of resins with functional group (by type aminophosphonic groups) recuperated from a biological environment for the use in a new study of antimicrobial test. Their stability was confirmed by Fourier transform infrared spectroscopy, energydispersive X-ray analysis and scanning electron microscopy

Chemical characterization by GC-MS and in vitro activity against Candida albicans of volatile fractions prepared from Artemisia dracunculus, Artemisia abrotanum, Artemisia absinthium and Artemisia vulgaris

BACKGROUND: A large number of essential oils is reported to have significant activity against Candida albicans. But the different chemical composition influences the degree of their activity. The intention of this study was to investigate the chemical composition and the activity against Candida albicans of volatile oils obtained from Artemisia dracunculus, A. abrotanum, A. absinthium and A. vulgaris (Asteraceae). The aim of the study was to identify new chemical compounds that have effect against C. albicans. The essential oils were obtained by hydrodistillation or extraction with dichloromethane (a new procedure we developed trying to obtain better, more separated compounds) from air dried above ground plant material and analyzed by GC-MS. Additionally commercial essential oils from the same species were tested. The Candida albicans inhibition studies were carried out by the paper disc diffusion method. RESULTS: The essential oils shared common components but presented differences in composition and showed variable antifungal activity. Davanone and derivatives thereof, compounds with silphiperfolane skeleton, estragole, davanone oil, β-thujone, sabinyl acetate, herniarin, cis-chrysanthenyl acetate, 1,8-cineol, and terpineol were the main components of Artemisia volatiles. CONCLUSIONS: Among the volatile fractions tested those from A. abrotanum containing davanone or silphiperfolane derivatives showed the highest antifungal activity. The in vitro tests revealed that the Artemisia oils are promising candidates for further research to develop novel anti-candida drugs

Removal of escherichia coli from water by system based on phosphorus - containing synthetic preformed polymer

A study of the removal of Escherichia Coli cells from water by a-hydroxyphosphonic group grafted on styrene-6.7% divinylbenzene copolymer was made. The a-hydroxyphosphonic - containing synthetic preformed polymer is well suited for subsequent use of the product as antibacterial agent

Removal of candida albicans from water by adhesion to aminophosphorous groups grafted onto poly (styrene-co-divinylbenzene)

Candida albicans is a fungal pathogen capable of causing opportunistic infections that may be lethal. The purpose of this study was to establish the removal percent of a Candida albicans culture from a water solution by using some polymers with antimicrobial activity. The mechanism of action is based on yeast adhesion on aminophosphorous active groups

Chitosan for fungal diseases control

The use of chitosan is a promising alternative; it can be applied in many fields based on its biological activity and easy-to-obtain procedures. Such it was used in agriculture, environmental protection, pharmaceutical and biomedical applications. The fungicidal activity of the chitosan against Fusarium graminearum, Penicillium chrysogenum and Aspergillus orizae were done by using the plate growth rate method

Studies on the antimicrobial activity of aqueous acids solutions of chitosan

The paper presents the results of the antimicrobial activity of two aqueous acid solutions of chitosan. Chitosan is a copolymer of glucosamine and N-acetylglucos- amine prepared from chitin by deacetylation. It is a natural and non toxic product that tends to be widely-used in medicine and food industry. The antimicrobial effect was tested against the representative Gram-positive bacteria: Staphylococcus aureus and Bacillus cereus and Gram-negative bacteria: Escherichia coli and Pseudomonas aeruginosa and one species of yeast: Candida albicans using disc diffusion test Chitosan had a good antimicrobial action of all tested species. The best antibacterial activity was observed for the acetic acid solution. The acetic acid solution chitosan also present an good antifungal activity.The lactic acid solution of chitosan present antibacterial activity Key words: chitosan; acid solutions, antimicrobial activity

The characterization of recycled poly(styrene-co-divinylbenzene) functionalized with α-hydroxyphosphonic acids for new study of antimicrobal tests

Antimicrobials are a wide variety of compounds with the attack for the destruction or inhibition of microorganisms.This article describes the using of recycled α-hydroxyphosphonic acids grafted on styrene-divinylbenzene copolymeras a recycled material for new study of antimicrobial tests