کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1763899 1020029 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bacterial cellulose may provide the microbial-life biosignature in the rock records
ترجمه فارسی عنوان
سلولز باکتریایی ممکن است بیوزیگانیسم زندگی میکروبی در پرونده های سنگ را فراهم کند
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
چکیده انگلیسی


• Bacterial cellulose-based film shows the accumulation of сhemical elements.
• Anorthosite rock has impact on the cellulose structure seen in changed FT-IR spectra.
• Bioleached from anorthosite elements create surface coats on the BC nanofibril web.
• In spite of shielding by minerals, spectral characteristics for BC were recognized.
• BC may be considered as a biosignature for a search of extraterrestrial life.

Bacterial cellulose (BC) is a matrix for a biofilm formation, which is critical for survival and persistence of microbes in harsh environments. BC could play a significant role in the formation of microbial mats in pristine ecosystems on Earth. The prime objective of this study was to measure to what extent spectral and other characteristics of BC were changed under the performance of BC interaction with the earthly rock – anorthosite – via microorganisms. The spectral analyses (Fourier Transform Infrared FT-IR, spectroscopy, and atomic absorption spectroscopy) showed unprecedented accumulation of chemical elements in the BC-based biofilm. The absorption capacity of IR by BC was shielded a little by mineral crust formed by microorganisms on the BC-based biofilm surface, especially clearly seen in the range of 1200–900 cm−1 in FT-IR spectra. Confocal scanning laser microscopy analysis revealed that elements bioleached from anorthosite created surface coats on the BC nanofibril web. At the same time, the vibrational spectra bands showed the presence of the characteristic region of anomeric carbons (960–730 cm−1), wherein a band at 897 cm−1 confirmed the presence of β-1, 4-linkages, which may serve as the cellulose fingerprint region. Results show that BC may be a biosignature for search signs of living organisms in rock records.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 53, Issue 5, 1 March 2014, Pages 828–835
نویسندگان
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