کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
6289506 1616331 2013 5 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Fungal biosorption of silver particles on 20th-century photographic documents
ترجمه فارسی عنوان
بیوسفر جذب قارچ ذرات نقره در اسناد عکاسی قرن بیست و یکم
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موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی

Microbial deterioration is a common problem in photographic collections and is considered a major cause of loss of documents. However, few studies so far have been addressed to biological damage on these materials. Several species of naturally occurring fungi can cause infections on the gelatin-silver emulsion of both positive and negative photographic material, producing defacement and loss of mechanical and aesthetical properties of the objects. In this study a particular phenomenon, spontaneously caused by fungi on 20th-century photographic films and positive supports, was documented by means of variable pressure scanning electron microscopy (VP-SEM) combined with electronic dispersion spectroscopy (EDS). This technique allowed the observation of entire, unaltered films without metallisation thus with a not invasive approach. The ability of some fungi to alter the distribution of silver crystals in the gelatin emulsion was described thanks to a backscattered electrons detector that showed differences in the atomic number of the visualised objects, giving rise to an appreciable contrast in case of different chemical composition.

► VP-SEM and EDS were used to document fungal attach on 20th-century photographic films. ► Fungi altered the distribution of silver crystals in the gelatin emulsion. ► Biosorption of Ag ions occurred from the gelatin layer to the fungal hyphae. ► Biogenic accumulation of Ag coinciding with fungal material was documented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 84, October 2013, Pages 367-371
نویسندگان
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