scholarly journals Freezing of sea water, dimethyl sulfoxide and alcohol aqueous solution using ice-nucleating bacterial cells entrapped in aluminium alginate capsule.

1991 ◽  
Vol 17 (4) ◽  
pp. 140-145
Author(s):  
Hitoshi OBATA ◽  
Hideo TANIGUCHI ◽  
Hidehisa KAWAHARA
Keyword(s):  
Aqueous Solution ◽  
Dimethyl Sulfoxide ◽  
Sea Water ◽  
Bacterial Cells

Effect of Different Salt Concentrations on Dimethyl Sulfoxide (DMSO) Nanocluster Structures by Molecular Dynamics Simulations

2020 ◽  
Vol 20 (8) ◽  
pp. 4799-4806
Author(s):  
Peng Xie ◽  
Shubin Jin ◽  
Chenggang Sun ◽  
Yushu Xie
Keyword(s):  
Aqueous Solution ◽  
Dimethyl Sulfoxide ◽  
Water Cluster ◽  
Water Solution ◽  
Md Simulations ◽  
Water Molecules ◽  
Nacl Concentration ◽  
Dynamics Simulations ◽  
Simulation Systems ◽  
Decentralized Model

We performed MD simulations to examine dimethyl sulfoxide (DMSO) nanocluster structures in NaCl aqueous solution with different concentrations (0.45 g/100 mL, 0.9 g/100 mL, 1.8 g/100 mL, 2.7 g/100 mL, and 3.6 g/100 mL). Results showed that interaction between Na+ and DMSO at the first solvation shells was weakened due to acceleration rotational influence of ion driven by NaCl concentration. We investigated the tetrahedral order parameter and average H-B number of water molecules. These results indicated that NaCl influenced the solvation structure of water cluster, but that of DMSO was not affected by NaCl. We also found that Na+ was prior solvated by water solution in these mixture systems, and Cl− only existed in the water cluster in our simulation systems. Consequently, we herein proposed a decentralized model that depicts microphysical structure images of DMSO in NaCl aqueous solution systems.

Algicidal activity and gliding motility of Saprospira sp. SS98-5

2003 ◽  
Vol 49 (2) ◽  
pp. 92-100 ◽  
Author(s):  
Gou Furusawa ◽  
Takeshi Yoshikawa ◽  
Akihiro Yasuda ◽  
Taizo Sakata
Keyword(s):  
Cell Walls ◽  
Marine Bacterium ◽  
Sea Water ◽  
Gliding Motility ◽  
Microtubule Assembly ◽  
Algicidal Activity ◽  
Bacterial Cells ◽  
Kagoshima Bay ◽  
Motile Cells ◽  
Ultrathin Sections

A marine bacterium, Saprospira sp. SS98-5, which was isolated from Kagoshima Bay, Japan, was able to kill and lyse the cells of the diatom Chaetoceros ceratosporum. The multicellular filamentous cells of this bacterium captured the diatom cells, formed cell aggregates, and lysed them in an enriched sea water (ESS) liquid medium. Strain SS98-5 also formed plaques on double layer agar plates incorporating diatom cells. The diatom cell walls were partially degraded at the contact sites with the bacteria, the bacteria invaded from there into the diatom cells, and then the diatom cells were completely lysed. The strain possessed gliding motility and grew as spreading colonies on ESS agar plates containing lower concentrations of polypeptone (below 0.1%) while forming nonspreading colonies on ESS agar plates containing 0.5% polypeptone. Electron micrographs of ultrathin sections demonstrated that microtubule-like structures were observable only in gliding motile cells. Both the gliding motility and the microtubule-like structures were diminished by the addition of podophyllotoxin, an inhibitor of microtubule assembly, suggesting that the microtubule-like structures observed in these bacterial cells are related to their gliding motility.Key words: Saprospira sp., Chaetoceros ceratosporum, gliding motility, algicidal activity, microtubule-like structure.

Sign in / Sign up

Export Citation Format

Share Document