Peng Liu, Hongbin Zhang, Sinong Wang, Hui-na Yu, Bingjie Lu, Xinran Li, Chun Wang, Yueer Yan, Yi Tang
Abstract The crystallinity indices (CrI) of Chinese handmade papers were investigated using the X-ray diffraction (XRD) method. Four Chinese handmade papers, Yingchun, Zhuma, Yuanshu and Longxucao papers were used as model substrates of mulberry bark, ramie, bamboo and Eulaliopsis binata papers, respectively. Two forms of the paper samples, paper sheets and their comminuted powders, were used in this study. The results showed that their XRD patterns belong to the cellulose-I type and Iβ dominates the cellulose microstructure of these paper samples. Moreover, it was found that the microstructures and CrIs of cellulose of these papers were changed by the grinding treatment. This work suggested that the sheet form of the handmade papers is suitable to determine CrI by XRD, despite the contribution of non-cellulosic components in the papers. The order of CrIs for these paper sheet samples was Yingchun, Zhuma, Longxucao and Yuanshu papers. Besides CrIs, differences in cross-sectional areas of the crystalline zone of cellulose can be used for comparing different types of handmade papers. It was also found that the CrIs and crystallite size of paper cellulose varied between the sheet samples and the powder samples, illustrating that the pulverisation has a negative influence on the microstructure of the handmade papers.
{"title":"Determination of crystallinity of Chinese handmade papers by means of X-ray diffraction","authors":"Peng Liu, Hongbin Zhang, Sinong Wang, Hui-na Yu, Bingjie Lu, Xinran Li, Chun Wang, Yueer Yan, Yi Tang","doi":"10.1515/res-2019-0009","DOIUrl":"https://doi.org/10.1515/res-2019-0009","url":null,"abstract":"Abstract The crystallinity indices (CrI) of Chinese handmade papers were investigated using the X-ray diffraction (XRD) method. Four Chinese handmade papers, Yingchun, Zhuma, Yuanshu and Longxucao papers were used as model substrates of mulberry bark, ramie, bamboo and Eulaliopsis binata papers, respectively. Two forms of the paper samples, paper sheets and their comminuted powders, were used in this study. The results showed that their XRD patterns belong to the cellulose-I type and Iβ dominates the cellulose microstructure of these paper samples. Moreover, it was found that the microstructures and CrIs of cellulose of these papers were changed by the grinding treatment. This work suggested that the sheet form of the handmade papers is suitable to determine CrI by XRD, despite the contribution of non-cellulosic components in the papers. The order of CrIs for these paper sheet samples was Yingchun, Zhuma, Longxucao and Yuanshu papers. Besides CrIs, differences in cross-sectional areas of the crystalline zone of cellulose can be used for comparing different types of handmade papers. It was also found that the CrIs and crystallite size of paper cellulose varied between the sheet samples and the powder samples, illustrating that the pulverisation has a negative influence on the microstructure of the handmade papers.","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"69 - 86"},"PeriodicalIF":0.4,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2019-0009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41875037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dear colleagues, This issue of the RESTAURATOR is being published during special times. Our words may reach you at home, during quarantine, at your workplace which may have changed, or at your studio with fewer projects as planned in your order book. We do hope that you stay healthy and that your professional prospects have not worsened considerably. Securities which we have taken for granted have suddenly vanished and our perspectives have shifted. However, one realization seems to prove true more than ever before: the importance of scientific research. We clearly see that it is not only essential to conduct research, but to also share research results and to base decisions on the outcome of transparent studies. In this respect, we want to thank our authors, reviewers and our board for making this publication possible – even during times of constraints and instability. Those of you who have visited our journal homepage will have noticed that the design of the page has changed. We think that searching the homepage has become more convenient and while currently, it is still partly under construction with new changes and guideline upcoming, we hope that you enjoy our new homepage as well! It is always worth visiting because in each issue there is one open access contribution, carefully selected to highlight research results published in RESTAURATOR. The current issue features contributions that had to wait for being printed a bit longer than usual due to our last year’s thematic issue on the history in conservation and teaching. The topics of the current issue range from a technical note on improving paper stability after converting blackened lead white with hydrogen peroxide by Raab et al. to a novel labelling technique to proof ownership by Krejčí et al. and to an analytical study to research the crystallinity of various handmade Chinese papers as a fundament to evaluate the crystallinity’s role in durability of paper.
{"title":"Editorial","authors":"Sigrid Eyb-Green, U. Henniges","doi":"10.1515/res-2020-2001","DOIUrl":"https://doi.org/10.1515/res-2020-2001","url":null,"abstract":"Dear colleagues, This issue of the RESTAURATOR is being published during special times. Our words may reach you at home, during quarantine, at your workplace which may have changed, or at your studio with fewer projects as planned in your order book. We do hope that you stay healthy and that your professional prospects have not worsened considerably. Securities which we have taken for granted have suddenly vanished and our perspectives have shifted. However, one realization seems to prove true more than ever before: the importance of scientific research. We clearly see that it is not only essential to conduct research, but to also share research results and to base decisions on the outcome of transparent studies. In this respect, we want to thank our authors, reviewers and our board for making this publication possible – even during times of constraints and instability. Those of you who have visited our journal homepage will have noticed that the design of the page has changed. We think that searching the homepage has become more convenient and while currently, it is still partly under construction with new changes and guideline upcoming, we hope that you enjoy our new homepage as well! It is always worth visiting because in each issue there is one open access contribution, carefully selected to highlight research results published in RESTAURATOR. The current issue features contributions that had to wait for being printed a bit longer than usual due to our last year’s thematic issue on the history in conservation and teaching. The topics of the current issue range from a technical note on improving paper stability after converting blackened lead white with hydrogen peroxide by Raab et al. to a novel labelling technique to proof ownership by Krejčí et al. and to an analytical study to research the crystallinity of various handmade Chinese papers as a fundament to evaluate the crystallinity’s role in durability of paper.","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"67 - 68"},"PeriodicalIF":0.4,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2020-2001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43028305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-06DOI: 10.1515/res-2020-frontmatter1
{"title":"Frontmatter","authors":"","doi":"10.1515/res-2020-frontmatter1","DOIUrl":"https://doi.org/10.1515/res-2020-frontmatter1","url":null,"abstract":"","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2020-frontmatter1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47524071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This research investigates chemical alteration in the important historical pigment called verdigris, both in the form of neutral verdigris (Cu(II) (CH3COO)2 . H2O) and basic verdigris (Cu(II)x(CH3COO)y(OH)z . nH2O), using reference pigment powders and historically relevant “mock-up” samples exposed to artificial aging. Analytical study of model samples by combined Raman spectroscopy, X-ray diffraction and visible spectroscopy provides new evidence that clarifies and builds on the often conflicting body of literature, first in terms of analytical identification of different forms of verdigris pigment, and second by tracing the alteration of neutral verdigris in systems that link to its behavior in aqueous media on historical types of paper. Results further suggest that the historical importance of neutral verdigris as a pigment is underestimated, since commercially available verdigris throughout its heyday – from before the Renaissance through the eighteenth century – was likely to have been dominated by the more easily manufactured neutral salt. This misunderstanding may arise from pigment alteration, whereby the neutral verdigris converts to basic copper salts, or forms organo-copper complexes.
{"title":"Tracing the Alteration of Verdigris Pigment through Combined Raman Spectroscopy and X-ray Diffraction, Part I","authors":"L. Brostoff, Cynthia Connelly Ryan","doi":"10.1515/res-2019-0007","DOIUrl":"https://doi.org/10.1515/res-2019-0007","url":null,"abstract":"Abstract This research investigates chemical alteration in the important historical pigment called verdigris, both in the form of neutral verdigris (Cu(II) (CH3COO)2 . H2O) and basic verdigris (Cu(II)x(CH3COO)y(OH)z . nH2O), using reference pigment powders and historically relevant “mock-up” samples exposed to artificial aging. Analytical study of model samples by combined Raman spectroscopy, X-ray diffraction and visible spectroscopy provides new evidence that clarifies and builds on the often conflicting body of literature, first in terms of analytical identification of different forms of verdigris pigment, and second by tracing the alteration of neutral verdigris in systems that link to its behavior in aqueous media on historical types of paper. Results further suggest that the historical importance of neutral verdigris as a pigment is underestimated, since commercially available verdigris throughout its heyday – from before the Renaissance through the eighteenth century – was likely to have been dominated by the more easily manufactured neutral salt. This misunderstanding may arise from pigment alteration, whereby the neutral verdigris converts to basic copper salts, or forms organo-copper complexes.","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"3 - 30"},"PeriodicalIF":0.4,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2019-0007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42759375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This paper discusses pigments used in Indian palm leaf manuscripts. Formerly it was believed that pigments for palm leaf illustrations were mostly sourced from plant extracts – a believe that is still widespread in India. This paper reports the identification of pigments of an illustrated palm leaf manuscript (eighteenth – nineteenth century) collected from the east coast of India. As Raman spectra of many pigments gave too high background noise, the identification was mostly accomplished through SEM-EDX and FTIR spectroscopy. The analytical findings indicated that both mineral colours and plant extracts were sourced for Indian palm-leaf manuscripts. Analysis indicated the use of lamp black for black, indigo for blue, vermillion for red, orpiment for yellow, china clay for white and a mixture of orpiment and indigo for green coloration in the illustrations. The data has improved our knowledge of historic pigments used in palm leaf illustrations. As some of the pigments are either photosensitive or darken due to atmospheric pollution, necessary preventive conservation measures need to be adopted.
{"title":"Investigation of Pigments on an Indian Palm Leaf Manuscript (18th – 19th century) by SEM-EDX and other Techniques","authors":"M. Singh, D. Sharma","doi":"10.1515/res-2019-0006","DOIUrl":"https://doi.org/10.1515/res-2019-0006","url":null,"abstract":"Abstract This paper discusses pigments used in Indian palm leaf manuscripts. Formerly it was believed that pigments for palm leaf illustrations were mostly sourced from plant extracts – a believe that is still widespread in India. This paper reports the identification of pigments of an illustrated palm leaf manuscript (eighteenth – nineteenth century) collected from the east coast of India. As Raman spectra of many pigments gave too high background noise, the identification was mostly accomplished through SEM-EDX and FTIR spectroscopy. The analytical findings indicated that both mineral colours and plant extracts were sourced for Indian palm-leaf manuscripts. Analysis indicated the use of lamp black for black, indigo for blue, vermillion for red, orpiment for yellow, china clay for white and a mixture of orpiment and indigo for green coloration in the illustrations. The data has improved our knowledge of historic pigments used in palm leaf illustrations. As some of the pigments are either photosensitive or darken due to atmospheric pollution, necessary preventive conservation measures need to be adopted.","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"49 - 65"},"PeriodicalIF":0.4,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2019-0006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47559127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Multigene phylogeny and reclassification of yeasts and related filamentous taxa in Basidiomycota Basidiomycota are mainly known from mushroom-forming or plant pathogenic species, such as the agarics, smuts, bunts and rusts. However, all three subphyla of Basidiomycota, namely Agaricomycotina, Pucciniomycotina and Ustilaginomycotina, contain species that entirely or largely grow in a unicellular stage and that are known as basidiomycetous yeasts. The taxonomy of these basidiomycetous yeasts, however, has developed largely independent from that of the other taxa and was mainly based on physiological growth profiles, biochemical features of the cell wall, but also DNA features, such as molar percentage guanine and cytosine of the DNA, and molecular phylogenetic inferences. The taxonomy of the filamentous and mushroom-forming Basidiomycota was mainly based on morphology. However, in the era of molecular systematics and comparative genomics the taxonomies of these two “groups” of Basidiomycota can be unified. In this volume of Studies in Mycology we present phylogenies using multiple genes mainly of yeast taxa of Basidiomycota that we integrated with phylogenetic information from filamentous growing basidiomycetes, mainly sequence information of the D1D2 domains of the large subunit of the ribosomal DNA. As a result many so-called yeast or yeast-like species could be linked to filamentous growing species and an updated taxonomy is proposed accordingly. Several traditionally recognized genera of basidiomycetous yeasts were highly polyphyletic, e.g. Cryptococcus and Rhodotorula, just to name two. The multigene phylogenies made it possible to a large extent to redefine such polyphyletic genera. Monophyly was used as a leading principle with clustering optimization and the iterative application of a modified general mixed Yule coalescent (GMYC) as operational
{"title":"Editorial","authors":"U. Henniges, Sigrid Eyb-Green","doi":"10.1515/res-2020-0005","DOIUrl":"https://doi.org/10.1515/res-2020-0005","url":null,"abstract":"Multigene phylogeny and reclassification of yeasts and related filamentous taxa in Basidiomycota Basidiomycota are mainly known from mushroom-forming or plant pathogenic species, such as the agarics, smuts, bunts and rusts. However, all three subphyla of Basidiomycota, namely Agaricomycotina, Pucciniomycotina and Ustilaginomycotina, contain species that entirely or largely grow in a unicellular stage and that are known as basidiomycetous yeasts. The taxonomy of these basidiomycetous yeasts, however, has developed largely independent from that of the other taxa and was mainly based on physiological growth profiles, biochemical features of the cell wall, but also DNA features, such as molar percentage guanine and cytosine of the DNA, and molecular phylogenetic inferences. The taxonomy of the filamentous and mushroom-forming Basidiomycota was mainly based on morphology. However, in the era of molecular systematics and comparative genomics the taxonomies of these two “groups” of Basidiomycota can be unified. In this volume of Studies in Mycology we present phylogenies using multiple genes mainly of yeast taxa of Basidiomycota that we integrated with phylogenetic information from filamentous growing basidiomycetes, mainly sequence information of the D1D2 domains of the large subunit of the ribosomal DNA. As a result many so-called yeast or yeast-like species could be linked to filamentous growing species and an updated taxonomy is proposed accordingly. Several traditionally recognized genera of basidiomycetous yeasts were highly polyphyletic, e.g. Cryptococcus and Rhodotorula, just to name two. The multigene phylogenies made it possible to a large extent to redefine such polyphyletic genera. Monophyly was used as a leading principle with clustering optimization and the iterative application of a modified general mixed Yule coalescent (GMYC) as operational","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"1 - 2"},"PeriodicalIF":0.4,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2020-0005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43311779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Karbowska-Berent, Izabela Żołowicz, E. Jabłońska
Abstract A small repository in a cathedral in Poland, storing severely damaged books, was investigated with regard to insects and fungi. Entomological and microbiological surveys were performed to estimate the extent of the infestation and the microbial deterioration of the books. Most of the books were attacked by insects although to varying degrees. They were damaged by tunnels bored by the larvae and filled with larval faeces. Some living larvae and many dead adult beetles were found in the books or in the frass. The larvae and most of the beetles were identified as the common deathwatch beetle Xestobium rufovillosum (DeGeer, 1774). The development of Xestobium rufovillosum in books is an unusual case and has rarely been mentioned in the literature. Several books in the repository were also covered by microfungi, especially by Chaetomium murorum, Ch. elatum, Myxotrichum chartarum, Stachybotrys atra and Epicoccum nigrum. The temperature in the repository varied, depending on the season of the year (2.6 °C – 26.2 °C), while the relative humidity was high (constantly above 65 %). The concentration of the fungal bioaerosol was very high (4,120 cfu/m3). The article includes a list of recommendations pertaining to the elimination of the microorganisms and insects.
{"title":"The Common Deathwatch Beetle Xestobium rufovillosum (DeGeer, 1774) as a Pest for Paper in Books","authors":"J. Karbowska-Berent, Izabela Żołowicz, E. Jabłońska","doi":"10.1515/res-2019-0010","DOIUrl":"https://doi.org/10.1515/res-2019-0010","url":null,"abstract":"Abstract A small repository in a cathedral in Poland, storing severely damaged books, was investigated with regard to insects and fungi. Entomological and microbiological surveys were performed to estimate the extent of the infestation and the microbial deterioration of the books. Most of the books were attacked by insects although to varying degrees. They were damaged by tunnels bored by the larvae and filled with larval faeces. Some living larvae and many dead adult beetles were found in the books or in the frass. The larvae and most of the beetles were identified as the common deathwatch beetle Xestobium rufovillosum (DeGeer, 1774). The development of Xestobium rufovillosum in books is an unusual case and has rarely been mentioned in the literature. Several books in the repository were also covered by microfungi, especially by Chaetomium murorum, Ch. elatum, Myxotrichum chartarum, Stachybotrys atra and Epicoccum nigrum. The temperature in the repository varied, depending on the season of the year (2.6 °C – 26.2 °C), while the relative humidity was high (constantly above 65 %). The concentration of the fungal bioaerosol was very high (4,120 cfu/m3). The article includes a list of recommendations pertaining to the elimination of the microorganisms and insects.","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"41 1","pages":"31 - 48"},"PeriodicalIF":0.4,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/res-2019-0010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42315206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-31DOI: 10.3138/9781487534264-012
{"title":"Index","authors":"","doi":"10.3138/9781487534264-012","DOIUrl":"https://doi.org/10.3138/9781487534264-012","url":null,"abstract":"","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"28 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87745140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-31DOI: 10.3138/9781487534264-009
{"title":"8. Analytic Concept of History","authors":"","doi":"10.3138/9781487534264-009","DOIUrl":"https://doi.org/10.3138/9781487534264-009","url":null,"abstract":"","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"52 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90863752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-31DOI: 10.3138/9781487534264-003
{"title":"2. Pantōn Anakephalaiōsis: A Theory of Human Solidarity","authors":"","doi":"10.3138/9781487534264-003","DOIUrl":"https://doi.org/10.3138/9781487534264-003","url":null,"abstract":"","PeriodicalId":21154,"journal":{"name":"Restaurator. International Journal for the Preservation of Library and Archival Material","volume":"31 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87619697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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