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  1. AU="Jianrui Zha"
  2. AU=Hickman Peter E AU=Hickman Peter E
  3. AU="Natalie Krahmer"
  4. AU="do Amaral, Diego Serrasol"
  5. AU=David Aldana P.
  6. AU="Hawkins, W"
  7. AU="Elaheh Allahyari"
  8. AU="Jusuo Zhou"
  9. AU="Thakkar, Savyasachi"
  10. AU="Holden, Mathew"
  11. AU=Sial Moaz
  12. AU="Daan Mes"
  13. AU=Gonzlez-Fernndez Brbara
  14. AU="Kaae Andersen, Klaus"
  15. AU="de Mey, Jo" AU="de Mey, Jo"
  16. AU="Rudy, Gabriella"
  17. AU="Bonvalet, Catherine"
  18. AU="Jogie-Brahim, Sherryline"
  19. AU="Almoguera, Berta"
  20. AU="Tran, Diep"
  21. AU="Ahmad, Kafeel"
  22. AU=Gor?kov Lev P.
  23. AU="Scott, Carol E"
  24. AU="Siewiera, Jacek"
  25. AU="Clutterbuck, Elizabeth A"
  26. AU="Shin, Dong Jin"
  27. AU="Talapuhan, Wulan"
  28. AU=Wang Cheng AU=Wang Cheng
  29. AU="Bélanger, Richard E"
  30. AU="Bárcena-Flores, Luis"
  31. AU="Bhargava, Tanvi"
  32. AU="Markus Hafner"
  33. AU="Simon, Jessica E"
  34. AU="Watson, Erin"
  35. AU=Cox Fionnuala
  36. AU="Rana, Dev Yash"
  37. AU="Negreira Caamaño, Martín"
  38. AU="Johan C. Karremans"
  39. AU="Elmutaz Shaikho Elhaj Mohammed"
  40. AU="Amjad, Muhammad"
  41. AU="Rolf D Kortmann"
  42. AU="Jelena Stanojević"
  43. AU="Rafael Sáez-Jiménez"
  44. AU="Carlile, Catherine R"
  45. AU="Husain, Waleed"
  46. AU="Casanelia, S"
  47. AU="Ireland, D. G."
  48. AU=Sargon Peter J.

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  1. Artikel ; Online: Temporary Consolidation of Marine Artifact Based on Polyvinyl Alcohol/Tannic Acid Reversible Hydrogel

    Qijun Huang / Jianrui Zha / Xiangna Han / Hao Wang

    Polymers, Vol 15, Iss 24, p

    2023  Band 4621

    Abstract: Underwater artefacts are vulnerable to damage and loss of archaeological information during the extraction process. To solve this problem, it is necessary to apply temporary consolidation materials to fix the position of marine artifacts. A cross-linked ... ...

    Abstract Underwater artefacts are vulnerable to damage and loss of archaeological information during the extraction process. To solve this problem, it is necessary to apply temporary consolidation materials to fix the position of marine artifacts. A cross-linked network hydrogel composed of polyvinyl alcohol (PVA), tannic acid (TA), borax, and calcium chloride has been created. Four hydrogels with varying concentrations of tannic acid were selected to evaluate the effect. The hydrogel exhibited exceptional strength, high adhesion, easy removal, and minimal residue. The PVA/TA hydrogel and epoxy resin were combined to extract waterlogged wooden artifacts and marine archaeological ceramics from a 0.4 m deep tank. This experiment demonstrates the feasibility of using hydrogel for the extraction of marine artifacts.
    Schlagwörter marine artifacts ; temporary consolidation ; extraction ; mussel-like hydrogel ; reversible removal ; Organic chemistry ; QD241-441
    Thema/Rubrik (Code) 930
    Sprache Englisch
    Erscheinungsdatum 2023-12-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Removal of Calcareous Concretions from Marine Archaeological Ceramics by Means of a Stimuli-Responsive Hydrogel

    Jianrui Zha / Qijun Huang / Xinyi Liu / Xiangna Han / Hong Guo

    Polymers, Vol 15, Iss 2929, p

    2023  Band 2929

    Abstract: The presence of calcareous concretions on the surface of marine archaeological ceramics is a frequently observed phenomenon. It is necessary to remove these materials when the deposits obscure the feature of ceramics. Unfortunately, calcareous ... ...

    Abstract The presence of calcareous concretions on the surface of marine archaeological ceramics is a frequently observed phenomenon. It is necessary to remove these materials when the deposits obscure the feature of ceramics. Unfortunately, calcareous concretions provide distinctive documentation of the burning history of ceramics. The interaction of acid solution or detachment of the deposit layers in physical ways leads to the loss of archeological information. To prevent the loss of archeological information and to achieve precise and gentle concretion removal, responsive hydrogel cleaning systems have been developed. The hydrogels synthesized are composed of networks of poly(vinyl acetate)/sodium alginate that exhibit desirable water retention properties, are responsive to Ca 2+ ions, and do not leave any residues after undergoing cleaning treatment. Four distinct compositions were selected. The study of water retention properties involved quantifying the weight changes. The composition was obtained from Fourier transform infrared spectra. The microstructure was obtained from scanning electron microscopy. The mechanical properties were obtained from rheological measurements. To demonstrate both the efficiency and working mechanism of the selected hydrogels, a representative study of mocked samples is presented first. After selecting the most appropriate hydrogel composite, a cleaning process was implemented on the marine archaeological ceramics. This article demonstrates the advantages of stimuli-responsive hydrogels in controlling the release of acid solution release, thereby surpassing the limitations of traditional cleaning methods.
    Schlagwörter ceramics ; gel cleaning ; Ca 2+ ion responsive ; archeological information ; Organic chemistry ; QD241-441
    Thema/Rubrik (Code) 930
    Sprache Englisch
    Erscheinungsdatum 2023-07-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  3. Artikel ; Online: Weathering mechanism of red discolorations on Limestone object

    Jianrui Zha / Shuya Wei / Chuanchang Wang / Zhimin Li / Youzhen Cai / Qinglin Ma

    Heritage Science, Vol 8, Iss 1, Pp 1-

    a case study from Lingyan Temple, Jinan, Shandong Province, China

    2020  Band 12

    Abstract: Abstract Red discolorations are an effloresce phenomenon detect on the surface of stone objects and considered as damage factor in both esthetic and conservation points of view. It is very difficult to remove and seldom report about their weathering ... ...

    Abstract Abstract Red discolorations are an effloresce phenomenon detect on the surface of stone objects and considered as damage factor in both esthetic and conservation points of view. It is very difficult to remove and seldom report about their weathering mechanism. Recently, numerous of red discolorations have affected the limestone objects of Lingyan Temple in Shandong province, one of the most important building materials in China. In order to set up the appropriate conservation remedy, it is essential to identify the origin, characteristics, composition, and the formation process of red discolorations. Several analytical and investigation techniques, such as X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Micro-Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) were used to better understand the red discolorations. The results demonstrated that the discolorations on limestone surface have been caused by carbonic acid weathering process. The red discolorations consisted mainly of kutnohorite (Ca(Fe,Mg,Mn)CO3) and iron oxides. They showed tabular, lamellar, and granular morphologies, which originated from the in situ carbonic acid weathering of kutnohorite. After rainfall, the Ca, Mg, Mn ions with relatively high solubility were primarily leached from carbonatite phases. It was resulting in the sedimentation of red iron oxides through a chemical reaction and physical adhesion. Based on those analyses, a chelating agent (ethylenediamine tetraacetic acid disodium salt) was chosen to remove theses red discolorations on the stone object.
    Schlagwörter Lingyan Temple ; Limestone artifact ; Red discoloration ; Raman ; Cleaning ; Conservation ; Fine Arts ; N ; Analytical chemistry ; QD71-142
    Thema/Rubrik (Code) 540
    Sprache Englisch
    Erscheinungsdatum 2020-06-01T00:00:00Z
    Verlag SpringerOpen
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  4. Artikel: Experimental study of biomass gasification with oxygen-enriched air in fluidized bed gasifier

    Liu, Lingqin / Yaji Huang / Jianhua Cao / Changqi Liu / Lu Dong / Ligang Xu / Jianrui Zha

    Science of the total environment. 2018 June 01, v. 626

    2018  

    Abstract: Considering the universality, renewability and cleanness of biomass, an experimental research is carried out using rice straw in a two-stage fluidized bed. The experimental analysis identified the relevant parameters in the operation of the two-stage ... ...

    Abstract Considering the universality, renewability and cleanness of biomass, an experimental research is carried out using rice straw in a two-stage fluidized bed. The experimental analysis identified the relevant parameters in the operation of the two-stage fluidized bed to investigate the properties of biomass enriched air gasification. Results show that higher gasification temperature is conducive to enhance the gasification performance. An increasing ER is shown to go against adding gas heat value. When oxygen concentration increases from 21% to 45%, the gas heating value increases from 4.00MJ/kg to 5.24MJ/kg and the gasification efficiency increases from 29.60% to 33.59%, which shows higher oxygen concentration is conducive to higher quality gas and higher gasification efficiency. A secondary oxygen injection leads to reduction of tar concentration from 15.78g/Nm3 to 10.24g/Nm3. The optimal secondary oxygen ratio is about 33.00%. When the secondary oxygen ratio increased to 46.86%, monocyclic aromatics reduced from 28.17% to 19.65% and PAHs increased from 34.97% to 44.05%, leading to the increase aromatization of tar.
    Schlagwörter air ; biomass ; fluidized beds ; gasification ; heat ; oxygen ; polycyclic aromatic hydrocarbons ; rice straw ; temperature
    Sprache Englisch
    Erscheinungsverlauf 2018-0601
    Umfang p. 423-433.
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2018.01.016
    Datenquelle NAL Katalog (AGRICOLA)

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