Guaianolides from (Kovalevsk.) Kovalevsk.

In continuation of our phytochemical study on the aerial part of (Kovalevsk.) Kovalevsk, three new guaiane-type sesquiterpene lactones were isolated namely karatanolide (), 11,13-dihydrokaratanolide () and 11,13-dihydrokaratanolide (), in addition to the two known sesquiterpene lactones 1,10-dihydroxyarglabin () and artefin (). The structures of the isolated sesquiterpene lactones were elucidated by IR and NMR spectroscopy.

Lacinilene C 7-methyl ether.

The title compound, C16H20O3 [systematic name: 1-hy-droxy-7-meth-oxy-1,6-dimethyl-4-(propan-2-yl)naphthalen-2(1H)-one], is a sesquiterpene isolated from foliar tissues of the cotton plant and is of inter-est with respect to its anti-bacterial properties. Its phenyl ring is ideally planar, and the maximum of deviation in the second ring is 0.386 (3) Å.

Desoxyhemigossypol 6-methyl ether.

THE TITLE SESQUITERPENE [SYSTEMATIC NAME: 6-methoxy-10-methyl-7-(propan-2-yl)-2-oxatricyclo[6.3.1.

[Hygienic evaluation of ambient air pollution in Ust'-Kamenogorsk].

The article deals with hygienic evaluation of Ust-Kamenogorsk ambient air pollution with nitrogen dioxide, carbon dioxide, phenol and suspended solids. Ambient air samples were taken in 36 points over 3 days at 6 am, noon, 6 and 9 pm (local time) during warm season (August) and cold season (December). According to the results obtained, the authors divided Ust-Kamenogorsk territory into 2 areas, based on IAP4 (index of air pollution): conditionally dirty area--over 7; conditionally clean area--under 7.

[Contemporary state of using specialized food products to correct metabolic processes in chemical intoxication (review of literature)].

The article deals with topics associated with contemporary state of using specialized food products to correct metabolic processes in intoxication with various chemicals.