Evaluation of Rate of Adhesion of Lactobacillus namurensis Strain GYP-74 to Porous Fine Ceramics

This study aimed to evaluate the ratio of adherence of lactic acid bacteria (LAB) to porous fine ceramics in order to develop a novel LAB-rich pickle container for the production of functional fermented vegetables. Some LAB were isolated from the salted rice bran used for pickling (Nukadoko in Japanese). These isolates were classified in Lactobacillus namurensis by phylogenetic analysis. Some pottery-shard (PS) samples were prepared by varying the mixing rate of polyacetal (POM) resin to clay (0-30% (v/v)) and the burning temperature (1000 degrees C or 1100 degrees C). A test of the adherence of strain GYP-74 to the PSs was performed. The results showed that the adherence rate was significantly higher in the PSs burned at 1100 degrees C as compared with those burned at 1000 degrees C. A pore distribution analysis showed that pore sizes of less than a few mu m and pore sizes in the range of a few mu m to a few hundred mu m were mainly distributed in the PSs without and with POM, respectively. X-ray diffraction analysis showed that both PSs with and without POM contained quartz and hematite. The PSs burned at 1000 degrees C and 1100 degrees C specifically contained microcline and mullite, respectively. This study revealed the basal information regarding what makes PSs adequate for LAB adhesion.

Automated summary

This study aimed to evaluate the adherence ratio of lactic acid bacteria (LAB) to porous fine ceramics for developing a novel LAB-rich pickle container. LAB isolated from salted rice bran were classified as Lactobacillus namurensis. Testing showed higher adherence rate on ceramics burned at 1100 degrees C, with pore distribution and X-ray diffraction analysis revealing factors influencing LAB adhesion.