Antifungal effect of different methyl and propyl paraben mixtures on the treatment of paper biodeterioration

Neves, Eva Raquel; Schäfer, Stephan; Phillips, Alan J. L.; Canejo, João P.; Macedo, Maria Filomena

doi:10.1016/j.ibiod.2008.07.011

Cited by 36 publications

(10 citation statements)

References 32 publications

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“…They are used not only for disinfection, but also for finishing processes in cellulosic materials, and thus the latter may become less susceptible to the destructive action of microorganisms. Also, antimicrobial agents are used to protect different paper forms (books, photographs, paintings) stored in libraries, archives and museums [2,15,36,39].…”

Section: Application Of Ionic Liquids In Protecting Paper From the Grmentioning

confidence: 99%

Application of Ionic Liquids in Paper Properties and Preservation

Koziróg¹,

Wysocka-Robak²

2017

Progress and Developments in Ionic Liquids

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For centuries, paper has been an important medium of information. Currently, the basic risk to the paper collection is "acidic paper" and the action of enzymes secreted by microorganisms on them. In order to 'prolong life' of these materials, in recent years, various chemical compounds have been used. In this chapter, ionic liquids (IL) are explored as substances for deacidification of paper and its conservation, including antifungal activity. The use of these substances in the manufacturing of paper is possible, but the ingredients play an important role. Imidazolium IL cause an increase in the pH (deacidification) of historical papers and do not cause worsening of their strength properties, but these compound can cause a colour change. Benzalkonium DLlactate and didecyldimethylammonium DL-lactate and derivatives of 1,2,4-triazole are used as effective inhibitors of growth of moulds on paper. The best antifungal activity in these ionic liquids is observed in the paper pine at a concentration of 5% and weakest in the samples from the pulp after chemical-thermomechanical treatment. New paper impregnated with ionic liquids is characterised by an increase in tear resistance, reduction of breaking length and a favourable influence on the paper colour.

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Section: Application Of Ionic Liquids In Protecting Paper From the Grmentioning

confidence: 99%

Application of Ionic Liquids in Paper Properties and Preservation

Koziróg¹,

Wysocka-Robak²

2017

Progress and Developments in Ionic Liquids

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“…Resorcinol is most frequently used in cosmetic hair dye formulations [9]. We also found methylparaben which is used as an antifungal [10]. We found Carbamate derivatives which are used as insecticide.…”

Section: Resultsmentioning

confidence: 81%

Determination of Exposure to Medical and Industrial Toxic Chemicals from Beijing by Human Hair, Nail and Blood Analysis

Yang¹,

Kechkeche²,

Belhadj-Tahar³

et al. 2015

FMAR

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The aim of the present work was to investigate the exposure to the medical and industrial toxic chemicals. The research was carried out on hair, nail and blood samples in a panel of 40 healthy volunteers aged 7 to 77 with an average of 45 ± 19 years (18 women (45%) and 22 men (55%)). All of these individuals had not received medication for at least 1 year, including antibiotics and psychotropic. This study was realized from July 2013 to March 2014 in Beijing, China. The method for an accurate and reliable screening of medical and an industrial toxic chemical was based on detection and assay by ultra-high performance liquid chromatography with UV detection type of diode arrays. Also more than 10,000 toxic molecules commonly found in western industrial countries were screened by coupling gas chromatography and mass spectrometry. The main results indicate that the molecules analyzed are mainly antibiotic (Gentamycine and Tobramycine), antidepressant (Amitriptylin and its metabolites), narcotic (MDMA and Clonitazene), ingredient in cosmetics (Benzenediol and Benzoic acid), insecticide (Carbamate derivative), ketamine, chlorhexidine and phthalate derivatives. There are no detailed documented baseline data of the analysis of medical and Industrial toxic pollutants in hair, nail and blood samples in Beijing; however, this study should be completed on samples from other provinces of China. This study is the first of its kind. Therefore, further studies should be conducted in other cities and provinces of China to be compared with each other.

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“…This finding is plausibly to be ascribed to an instrumental error when the ionic strength is extremely low (Strlič et al 2004). Accordingly, the pH of Whatman paper should be nearly neutral (Kočar et al 2005;Neves et al 2009), as it is made of pure cellulose, free from additives. Probably, further work on the correct procedure and equipment to determine pH values in solutions with very low ionic strength should be carried out.…”

Section: Resultsmentioning

confidence: 99%

Oxidative degradation of non-recycled and recycled paper

Coppola

Modelli

2020

Cellulose

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The degradation of paper-based materials involves several and complex mechanisms, such as hydrolysis and oxidation. The behaviour of different types of pulps can be very variable. In this study, the difference upon oxidation of contemporary non-recycled and recycled papers, which now constitute a considerable fibre source, is investigated. A 0.015 M potassium periodate solution is used to oxidise five types of paper, two non-recycled and three recycled, for 0.5, 1, 2 and 4 h. The effects of such oxidation treatments are evaluated in terms of carbonyl content and degree of polymerisation (DP). A modified procedure of the Szabolcs’s method and viscometry are used to measure the carbonyl content and DP, respectively. The carbonyl groups are found to increase more rapidly in the recycled papers than in the non-recycled ones. On the contrary, oxidation causes a larger decrease of the DP values in the non-recycled papers, the paper made of pure cellulose being the most sensitive in terms of depolymerisation. The DP values measured for pure cellulose paper are in line with previously reported data. Moreover, in accordance with the Ekenstam equation, the plots of the reciprocal of DP as a function of oxidation time show good linear correlations for all types of paper investigated. Pseudo rate constants are thus calculated from the slopes of these plots, those of the non-recycled papers being found to be higher than those of the recycled papers. Graphic abstract

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Antifungal effect of different methyl and propyl paraben mixtures on the treatment of paper biodeterioration

Cited by 36 publications

References 32 publications

Application of Ionic Liquids in Paper Properties and Preservation

Application of Ionic Liquids in Paper Properties and Preservation

Determination of Exposure to Medical and Industrial Toxic Chemicals from Beijing by Human Hair, Nail and Blood Analysis

Oxidative degradation of non-recycled and recycled paper

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