The deodorizing mechanism of (-)-epigallocatechin gallate (ECCg), the main constituent of a green tea extract, against methyl mercaptan (CH,SH) was investigated. EGCg showed deodorizing activity against CH3SH by a chemica] reaction between EGCg and CH3SH. The non-volatile reaction products were identified to be compounds introducing a methylthio andlor a methylsulfinyl group into the B ring of ...

The deodorizing activity of dokudami (HouttuyniacordataThunb.) for masking the odor of fresh garlic was investigated, and the volatility of the deodorizing compounds was examined. Two grams of garlic was placed in a beaker and heated for 5 min at 40 °C. Next, aliquots of 0.01 and 0.05 g of powdered samples of seven plants (dokudami, thyme, rosemary, coriander, dandelion, spiny sow thistle and g...

A deodorizing substance in black cumin (Nigella sativa L.), a spice for curry and vegetable foods in Southwest Asia, was examined. The essential oil prepared from the seeds of this plant exhibited strong deodorizing activity against methyl mercaptan, which is a main factor in oral malodor. After purification with silica gel column chromatography, the active substance in black cumin seed oil was...

Since the Law of Offensive Odor Control was enacted, many enterprises have made efforts to prevent odor nuisance. Odor survey was conducted at each factory and characteristics of odor emission for each kind of business were made clear. And many researches and developments have been carried out to confirm reliable technique. In order to remove odorants from exhaust gas, deodorizing plants have b...