![]() The 100 % BC mixtures reduced plant growth indicated by the lower SPAD, nutrient contents, shoot fresh weight, total DW, as well as photosynthesis, which could result from the Magnesium deficiency caused by high pH, total porosity, and air space. Results showed that all the different mint plants grown in BC-amended mixtures (except for 100 % BC) had similar soil-plant analyses development (SPAD) reading (except spearmint in 80 % BC), shoot fresh weight, and total dry weight (DW) compared with the control. The peat moss-based commercial substrate was used as control. ![]() × piperita L.), Kentucky Colonel mint (M. To evaluate BC’s use as container substrate for valuable crop production, a greenhouse study was conducted with mixed hardwood BC incorporated with peat moss-based commercial substrate at different rates (20 %, 40 %, 60 %, 80 %, or 100 % by vol.) to produce chocolate mint (Mentha×piperita L. Recent studies showed that biochar (BC) has the potential to partially replace peat moss-based commercial substrate as container substrates to produce crops, but the research of its use for industrial crop production is limited. These results demonstrate the possibility of using dementholized oil of Japanese mint as a freshening agent of toiletry products. Hokuto DM oil significantly deodorized isovaleric acid by a masking effect, with compounds containing a p-menthane skeleton, namely pulegone and menthone, found to contribute largely to the deodorant effects. ![]() The deodorization activities of hokuto DM oil against four human malodors were measured by sensory evaluation and SPME-GC/MS analysis. ![]() Among these, menthone, linalool, neoisomenthol, menthol and an unidentified compound were identified as the aroma-active components by AEDA. The major components of hokuto DM oil were menthol, menthone, isomenthone and menthyl acetate. We focused on the dementholized oil of hokuto (hokuto DM oil), analysis of their aroma-active components and the potential deodorization effects against human malodors were demonstrated. ex Holmes), ‘hokuto,’ is the highest-yield cultivar and contains a large amount of l-menthol in its essential oil.
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