Improving the antibacterial activity against Staphylococcus aureus of composite sheets containing wasted tea leaves by roasting
We used various kinds of wasted tea leaves to develop composite sheets with antibacterial properties. Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:⁶-10⁷ CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-f...
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| Veröffentlicht in: | Journal of wood science 2010-10, Vol.56 (5), p.403-410 |
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| creator | Takahashi, Tetsuya Aso, Yuji Kasai, Wakako Kondo, Tetsuo |
| description | We used various kinds of wasted tea leaves to develop composite sheets with antibacterial properties. Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:⁶-10⁷ CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-free sheet. This indicates that cell growth was signifi cantly inhibited. For sheets containing other types of tea leaves (oolong, black, hojicha, and pu-erh), living cells were not found, indicating that these sheets had superior antibacterial effects. Living cells were also not found in sheets containing wasted black tea leaves or roasted tea leaves at a concentration of 60% by weight after 6 h cultivation. Therefore, roasting treatment of wasted green tea leaves was examined to improve the antibacterial activity of the sheet. In particular, the focus was on structural conversion of catechins by heating. |
| doi_str_mv | 10.1007/s10086-010-1110-9 |
| format | Article |
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Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:⁶-10⁷ CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-free sheet. This indicates that cell growth was signifi cantly inhibited. For sheets containing other types of tea leaves (oolong, black, hojicha, and pu-erh), living cells were not found, indicating that these sheets had superior antibacterial effects. Living cells were also not found in sheets containing wasted black tea leaves or roasted tea leaves at a concentration of 60% by weight after 6 h cultivation. Therefore, roasting treatment of wasted green tea leaves was examined to improve the antibacterial activity of the sheet. 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Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:⁶-10⁷ CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-free sheet. This indicates that cell growth was signifi cantly inhibited. For sheets containing other types of tea leaves (oolong, black, hojicha, and pu-erh), living cells were not found, indicating that these sheets had superior antibacterial effects. Living cells were also not found in sheets containing wasted black tea leaves or roasted tea leaves at a concentration of 60% by weight after 6 h cultivation. Therefore, roasting treatment of wasted green tea leaves was examined to improve the antibacterial activity of the sheet. In particular, the focus was on structural conversion of catechins by heating.</description><subject>Antibacterial activity</subject><subject>Biomedical and Life Sciences</subject><subject>Black tea</subject><subject>Catechin</subject><subject>Cells (biology)</subject><subject>Characterization and Evaluation of Materials</subject><subject>Composite sheet</subject><subject>Cultivation</subject><subject>Green tea</subject><subject>Life Sciences</subject><subject>Materials Science</subject><subject>Original Article</subject><subject>recycling</subject><subject>Roasting</subject><subject>Sheets</subject><subject>Staphylococcus aureus</subject><subject>Wasted tea leaves</subject><subject>Wood Science & Technology</subject><issn>1435-0211</issn><issn>1611-4663</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9UU2P1DAMrRBILAs_gBOROHAq2E2mbY5oxcdKK3FY9hy5qTuTVacZknTQnPjreDRISBy42M_Oe0-xXlW9RniPAN2HLLVva0CoEaXYJ9UVtoi1aVv9VLDRmxoaxOfVi5wfQaDp9FX163Z_SPEYlq0qO1a0lDCQL5wCzUpAOIZyUrSlsOSi7gsddqc5-uj9mhWtiaXFSfm4P8QcCqu8Yy5ZFksRzdn3J-XCoypMamY6clbDSaUoW3l9WT2baM786k-_rh4-f_p-87W--_bl9ubjXe030JXaWPTt2KDuu2ZkHthYAvLW9EZPLY4tjMYMyNDT5O0gx_X92DGQRjOBB31dvbv4yrU_Vs7F7UP2PM-0cFyzs2BM3xiNwnz7D_MxrmmRz7mm2ViNaG0vLLywfIo5J57cIYU9pZNDcOdE3CURB-dZEnFWNM1Fk4W7bDn9df6f6M1FNFF0tE0hu4f7BlADWtCSo_4N0xCZiA</recordid><startdate>20101001</startdate><enddate>20101001</enddate><creator>Takahashi, Tetsuya</creator><creator>Aso, Yuji</creator><creator>Kasai, Wakako</creator><creator>Kondo, Tetsuo</creator><general>Japan : Springer Japan</general><general>Springer Japan</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7QL</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20101001</creationdate><title>Improving the antibacterial activity against Staphylococcus aureus of composite sheets containing wasted tea leaves by roasting</title><author>Takahashi, Tetsuya ; 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Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:⁶-10⁷ CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-free sheet. This indicates that cell growth was signifi cantly inhibited. For sheets containing other types of tea leaves (oolong, black, hojicha, and pu-erh), living cells were not found, indicating that these sheets had superior antibacterial effects. Living cells were also not found in sheets containing wasted black tea leaves or roasted tea leaves at a concentration of 60% by weight after 6 h cultivation. Therefore, roasting treatment of wasted green tea leaves was examined to improve the antibacterial activity of the sheet. In particular, the focus was on structural conversion of catechins by heating.</abstract><cop>Japan</cop><pub>Japan : Springer Japan</pub><doi>10.1007/s10086-010-1110-9</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Antibacterial activity Biomedical and Life Sciences Black tea Catechin Cells (biology) Characterization and Evaluation of Materials Composite sheet Cultivation Green tea Life Sciences Materials Science Original Article recycling Roasting Sheets Staphylococcus aureus Wasted tea leaves Wood Science & Technology |
| title | Improving the antibacterial activity against Staphylococcus aureus of composite sheets containing wasted tea leaves by roasting |
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