PMID- 31029625
OWN - NLM
STAT- MEDLINE
DCOM- 20191119
LR  - 20191119
IS  - 1879-0003 (Electronic)
IS  - 0141-8130 (Linking)
VI  - 133
DP  - 2019 Jul 15
TI  - Chitosan enhances calcium carbonate precipitation and solidification mediated by 
      bacteria.
PG  - 867-874
LID - S0141-8130(18)36614-5 [pii]
LID - 10.1016/j.ijbiomac.2019.04.172 [doi]
AB  - Formation of the biominerals in living organisms is mainly associated with 
      organic macromolecules. These organic materials play an important role in the 
      nucleation, growth, and morphology controls of the biominerals. Current study 
      mimics this concept of organic matrix- mediated biomineralization by using 
      microbial induced carbonate precipitation (MICP) method in combination with the 
      cationic polysaccharide chitosan. CaCO(3) precipitation was performed by the 
      hydrolysis of urea by the ureolytic bacteria Pararhodobacter sp. SO1 in the 
      presence of CaCl(2), with and without chitosan. The crystal polymorphism and 
      morphology of oven-dried samples were analyzed by X-ray diffraction and scanning 
      electron microscopy. The amount of precipitate obtained was higher in the 
      presence of chitosan. The precipitate included both of the CaCO(3) and the 
      chitosan hydrogel. Rhombohedral crystals were dominant in the precipitate without 
      chitosan and distorted crystal agglomerations were found with chitosan. Sand 
      solidification experiments were conducted in the presence of chitosan under 
      different experimental conditions. By adding chitosan, more strongly cemented 
      sand specimens could be obtained than those from conventional method. All of 
      these results confirm the positive effect of chitosan for the CaCO(3) 
      precipitation and sand solidification.
CI  - Copyright (c) 2019 Elsevier B.V. All rights reserved.
FAU - Nawarathna, Thiloththama Hiranya Kumari
AU  - Nawarathna THK
AD  - Division of Sustainable Resources Engineering, Graduate School of Engineering, 
      Hokkaido University, Kita 13, Nishi 8, Kita-Ku, Sapporo 060-8628, Japan.
FAU - Nakashima, Kazunori
AU  - Nakashima K
AD  - Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido 
      University, Kita 13, Nishi 8, Kita-Ku, Sapporo 060-8628, Japan. Electronic 
      address: nakashima@geo-er.eng.hokudai.ac.jp.
FAU - Kawasaki, Satoru
AU  - Kawasaki S
AD  - Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido 
      University, Kita 13, Nishi 8, Kita-Ku, Sapporo 060-8628, Japan. Electronic 
      address: kawasaki@geo-er.eng.hokudai.ac.jp.
LA  - eng
PT  - Journal Article
DEP - 20190425
PL  - Netherlands
TA  - Int J Biol Macromol
JT  - International journal of biological macromolecules
JID - 7909578
RN  - 8W8T17847W (Urea)
RN  - 9012-76-4 (Chitosan)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - Calcium Carbonate/*chemistry
MH  - *Chemical Precipitation
MH  - Chitosan/*chemistry
MH  - Hydrolysis
MH  - Rhodobacteraceae/*metabolism
MH  - Urea/chemistry
OTO - NOTNLM
OT  - Biomineral
OT  - Calcium carbonate
OT  - Chitosan
OT  - Hydrogel
OT  - Morphology
EDAT- 2019/04/29 06:00
MHDA- 2019/11/20 06:00
CRDT- 2019/04/29 06:00
PHST- 2018/11/30 00:00 [received]
PHST- 2019/04/01 00:00 [revised]
PHST- 2019/04/24 00:00 [accepted]
PHST- 2019/04/29 06:00 [pubmed]
PHST- 2019/11/20 06:00 [medline]
PHST- 2019/04/29 06:00 [entrez]
AID - S0141-8130(18)36614-5 [pii]
AID - 10.1016/j.ijbiomac.2019.04.172 [doi]
PST - ppublish
SO  - Int J Biol Macromol. 2019 Jul 15;133:867-874. doi: 
      10.1016/j.ijbiomac.2019.04.172. Epub 2019 Apr 25.