Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Kyujin Ahn"'
Publikováno v:
BioResources, Vol 18, Iss 3, Pp 6430-6498 (2023)
For about two millennia, paper has served as a main medium for preservation of people’s ideas, stories, contracts, and art. This article reviews what is known about the various components that make up paper from the perspective of their long-term s
Externí odkaz:
https://doaj.org/article/fb6703ea5f504e2293578057e3f7fb2b
Publikováno v:
Cellulose. 29:3733-3744
Correctness and reliability of molar mass data by viscometry in organometallic solvents (cuen, cuoxam, cadoxen) are compromised by the alkalinity of these solvents which causes immediate depolymerization especially in the case of pulps with higher ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cb69a10de4d5502f8ea5793cd235cc3
https://doi.org/10.1007/s10570-022-04505-w
https://doi.org/10.1007/s10570-022-04505-w
Autor:
Markus Bacher, Kyujin Ahn, Andreas Hofinger, Thomas Rosenau, Antje Potthast, Ute Henniges, Takashi Hosoya, Nele Sophie Zwirchmayr, Hubert Hettegger, Sara Zaccaron
Publikováno v:
Cellulose. 26:429-444
Literature is strongly contradictory about the molecular reasons for yellowing and brightness reversion of pure (lignin- and hemicellulose-free) celluloses, such as in highly bleached pulps, bacterial cellulose, or cotton linters. While oxidized grou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f4aba5b6c6736a2db9c8c1fa33e16a1
https://doi.org/10.1007/s10570-018-2200-x
https://doi.org/10.1007/s10570-018-2200-x
Autor:
Antje Potthast, Kyujin Ahn, Manuel Becker, Thomas Eichinger, Mirjana Kostic, Stefan Böhmdorfer, Myung Joon Jeong, Thomas Rosenau
Publikováno v:
Carbohydrate Polymers
Gaseous acetic acid is formed under conditions of storage of historic paper objects. Its presence not only promotes hydrolytic cleavage of cellulose, but also causes acetylation of the cellulosic material to very small degree. The acetylation reactio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::376f69bd5ceb1196a3d1c8c22575925f
https://doi.org/10.1016/j.carbpol.2022.119323
https://doi.org/10.1016/j.carbpol.2022.119323
Autor:
Kyujin Ahn
Publikováno v:
Journal of Korea Technical Association of The Pulp and Paper Industry. 50:19-27
Determination of pH of book papers and paper-based records is often required to monitor their conditions and/or the effect of conservation treatments. Since sampling for pH measurement is not generally allowed for real paper objects, pH indicators ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afe9ce1934f9fcfab46b9bbe08f3e685
https://doi.org/10.7584/jktappi.2018.06.50.3.19
https://doi.org/10.7584/jktappi.2018.06.50.3.19
Publikováno v:
Scopus-Elsevier
According to published studies, certain nonaqueous solution-based treatments can be highly effective for prolonging the useful lives of bound volumes, within which the paper had been formed under acidic papermaking conditions. Such treatments, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22edad4c986d701cc6bb4aba57fd0ab1
https://doi.org/10.15376/biores.13.3.hubbe
https://doi.org/10.15376/biores.13.3.hubbe
Publikováno v:
Biomacromolecules. 20(11)
Although efficient and inexpensive, conventional viscometry to determine the average degree of polymerization (DP) of cellulose may mislead the final DP because cellulose degradation occurs in the used solvents, which consist of alkaline amino comple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::994fa45922c692eb420153b8a2f3a48f
https://pubmed.ncbi.nlm.nih.gov/31560197
https://pubmed.ncbi.nlm.nih.gov/31560197
Autor:
Kyujin Ahn, Kristina Druceikaite, Christa Hofmann, Andreas Hartl, Ute Henniges, Antje Potthast
Publikováno v:
Journal of Paper Conservation. 17:88-99
The results of a research project on verdigris on paper have been applied in the conservation of a celestial atlas and a series of printed books with images of cities in Renaissance time. Paper degraded by verdigris was chemically stabilized by apply
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be116b11f529db402f8f117a6fb32d97
https://doi.org/10.1080/18680860.2016.1247515
https://doi.org/10.1080/18680860.2016.1247515
Publikováno v:
Carbohydrate Polymers. 134:136-143
To better assess the stabilization effects of chemical treatments on Cu(II)-catalyzed cellulose degradation, we developed Cu(II)-containing model rag paper with typical copper corrosion characteristics using e-beam radiation. The paper can be prepare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::476bc7de7c863142dda8b30debdbab0f
https://doi.org/10.1016/j.carbpol.2015.07.040
https://doi.org/10.1016/j.carbpol.2015.07.040
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
Scientific Reports
Scientific Reports
When a fire strikes libraries or archives, physical deterioration of the paper is so severe that its chemical properties are often regarded as less important. However, knowledge of the chemical changes of the papers upon nearly burning is necessary t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16824d22d4c58ec1e11270665f056566
https://doi.org/10.1038/s41598-018-30424-7
https://doi.org/10.1038/s41598-018-30424-7