Reference

Roles of tobacco cellulose, sugars, and chlorogenic acid as precursors to catechol in cigaret smoke

Roles of tobacco cellulose, sugars, and chlorogenic acid as precursors to catechol in cigaret smoke. Carmella, Steven G.; Hecht, Stephen S.; Tso, T. C.; Hoffmann, Dietrich (Naylor Dana Inst. Dis. Prevent., Am. Health Found., Valhalla, NY 10595, USA). J. Agric. Food Chem., 32(3), 267-73 (English) 1984.There are some reagents with their cas registry numbers 153-18-4 and 57-50-1 are used in this study. CODEN: JAFCAU. ISSN: 0021-8561. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) Tobaccos was extd. sequentially with hexane and MeOH/H2O, and the exts. pyrolyzed at 650°. The MeOH/H2O ext. and the extd. tobacco residue were good pyrolytic precursors to catechol (I) [120-80-9]. Subfractions of the MeOH/H2O ext. were isolated by high-performance liq. chromatog. and pyrolyzed. Fructose [57-48-7], glucose [50-99-7], sucrose [57-50-1] and chlorogenic acid [327-97-9] were identified as important pyrolytic precursors to I. Cellulose [9004-34-6], a component of the extd. tobacco residue, was also a good precursor to I in pyrolysis expts. To det. the role of these substances as precursors to I under the conditions prevailing in a burning cigaret, either [14C(U)]cellulose, [14C(U)]fructose, or various levels of the unlabeled polyphenols chlorogenic acid or rutin [153-18-4] were added to cigarets and the mainstream smoke analyzed for [14C] I and I. On the basis of these expts., the min. contributions of these compds. to mainstream smoke I levels were estd. as follows: cellulose, 7-12%; total of fructose, glucose, and sucrose, 4%; chlorogenic acid, 13%; rutin, <1%. A significant portion of the remaining I in mainstream cigaret smoke possibly is formed from pectin, starch, and hemicellulose. .

Some factors concerned with the development of cyanide-resistant respiration in mitochondria isolated from gamma-irradiated potatoes

Some factors concerned with the development of cyanide-resistant respiration in mitochondria isolated from gamma-irradiated potatoes. Chachin, Kasuo; Iwata, Takasi (Coll. Agric., Univ. Osaka Prefect., Sakai, Japan). Shokuhin Shosha, 17(1-2), 1-11 (Japanese) 1982. CODEN: SNNSB3. ISSN: 0387-1975. DOCUMENT TYPE: Journal CA Section: 8 (Radiation Biochemistry) Section cross-reference(s): 11 g-Irradn. of potatoes to inhibit sprouting increased CO2 evolution and O absorption, and also slightly increased C2H4 formation. Irradn. also induced C2H4 evolution from pith and epidermal tissue. ATP stimulated succinate oxidn. by mitochondria of irradiated potatoes for ￡3 days after irradn. Part of this increased respiration was resistant to CN-. The mitochondria also showed slightly increased ATPase activity, but no differences in ATP formation from ADP, compared to mitochondria from unirradiated potatoes. Irradn. of isolated potato mitochondria did not affect their oxidn. of succinate. Mitochondria isolated from unirradiated, C2H4-treated potatoes showed CN--resistant respiration. Chlorogenic acid and caffeic acid induced a small amt. of CN--resistant respiration in mitochondria from unirradiated potatoes. Possible mechanisms in the formation of CN--resistant respiration in potatoes during irradn. are discussed.Except for chemicals metioned above, 56-65-5 and 327-97-9 are also used. .