5 research outputs found

    Identify function methyl cellulose glue of rehabilitation and activation in preparation Tissues used in restoration paper works

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    This article aims to facilitate the use of methyl cellulose adhesive to repair paper works that its ink is sensitive to water. This research is conducted by analytical comparisons method and samples is collected by experiments related to research topics such as pH measurement, Calorimetric, infrared spectroscopy with total attenuated reflection (FTIR- ATR), the measurement of tensile strength as well measurement of The adhesive strength of the samples. The stages of this study is conducted so that the adhesive methyl cellulose at a concentration of 7% in methanol was prepared. The prepared specimens is treated under Temperature-humidity accelerated aging in accordance with standard ASTM D4714-96 no for 384 hours and under light in accordance with ASTM D6789-02 for 360 hours and Changes of color, pH, tensile strength and adhesion is investigated for them. Results showed that the samples pH is changed from 6.91 to 6.39 after light aging and to 6.06 after temperature-humidity aging. Also, Tensile strength of Samples is reduced from 0.31 to 0.23 kN per meter after light aging and to 0.24 kN per meter after the temperature-humidity aging. Also, the adhesive strength of the samples is decreased from 1.43 to 0.97 Newton after light aging and to 1.51 Newton after temperature-humidity aging

    Study of side effects of Thiophanate-methyl fungicide on aesthetic and structural properties of ‎paper

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    ‎ The most of the fungicide‏ ‏that are used to prevent or stop the biological destruction of the historical papers have been used ‎at the first time in domains of science and industrial So thiophanate methyl which is most useful in agriculture, have been ‎tested in repairing and protection of papers and it’s one of the most useful materials in agriculture antifungals.The main ‎aim of this research was assessment of aesthetic and structural effects on paper after treatment by Thiophanate-methyl ‎compound. Experimental method (laboratory experience) and library study wre applied in this research. ATR-FTIR spectra ‎showed that spray of Thiophanate-methyl on paper did not produce any degradation effect. The compound had not ‎changed aesthetical properties and pH values. Tensile strength of paper did not reduce due to the treatment. This indicates ‎nondestructive effects of Thiophanate-methyl on paper which signifies its great capability for application in conservation ‎and restoration of paper.

    The assessment of antifungal effect of Thiophanate-methyl on Paper destructive fungi and ‎its application in conservation paper works

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    Paper works are more attacked by biological agents such as fungi, bacteria and insects due to its organic nature. In ‎archives, most of the biological destruction of paper is related to fungi. The importance of paper works ‎conservation has led to applying different methods to fungus removal. The chemical disinfection is of of the most ‎common disinfection methods. In this research, the application of Thiophanate methyl in paper destructive fungi ‎has been studied. Laboratory studies to evaluate the effects of Thiophanate methyl on paper and fungus include ‎accelerated ageing, the evaluation of effectiveness of antifungal Thiophanate methyl on fungi such as ‎Aspergillusniger, Aspergillusflavus and Penicilliurnsp and determination of antifungal stability after accelerated ‎ageing. Examination shows that Thiophanate methyl has successfully prevented spread of fungus in all density of ‎‏10‏‎, ‎‏50‏‎, ‎‏100,200‏‎ and ‎‏500‏‎ ppm. Aspergillus flavus fungus had a slight growth at ‎‏10‏‎ ppm, but no growth were ‎observed in other density. Aspergillusniger fungus had no growth capacity in density more than ‎‏100‏‎ ppm. ‎According to the results, treated papers are still able to control fungus growth after being in accelerated ageing ‎condition. In general, the results obtained by fungus growth halo and non-growth halo indicate that all fungi are ‎controllable in density of ‎‏200‏‎ ppm.

    Supplemental material - Telemedicine technologies and applications in the era of COVID-19 pandemic: A systematic review

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    Supplemental material for Telemedicine technologies and applications in the era of COVID-19 pandemic: A systematic review by Esmaeil Mehraeen, Seyed Ahmad Seyed Alinaghi, Mohammad Heydari, Amirali Karimi, Abdollah Mahdavi, Mehrnaz Mashoufi, Arezoo Sarmad, Peyman Mirghaderi, Ahmadreza Shamsabadi, Kowsar Qaderi, Pegah Mirzapour, Amirata Fakhfouri, Hadiseh Azadi Cheshmekabodi, Kimia Azad, Seyed Ali Bagheri Zargande, Shahram Oliaei, Parisa Yousefi Konjdar, Farzin Vahedi, Tayebeh Noori in Health Informatics Journal</p

    Supplemental material - Telemedicine technologies and applications in the era of COVID-19 pandemic: A systematic review

    No full text
    Supplemental material for Telemedicine technologies and applications in the era of COVID-19 pandemic: A systematic review by Esmaeil Mehraeen, Seyed Ahmad Seyed Alinaghi, Mohammad Heydari, Amirali Karimi, Abdollah Mahdavi, Mehrnaz Mashoufi, Arezoo Sarmad, Peyman Mirghaderi, Ahmadreza Shamsabadi, Kowsar Qaderi, Pegah Mirzapour, Amirata Fakhfouri, Hadiseh Azadi Cheshmekabodi, Kimia Azad, Seyed Ali Bagheri Zargande, Shahram Oliaei, Parisa Yousefi Konjdar, Farzin Vahedi, Tayebeh Noori in Health Informatics Journal</p
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