The descriminant criteria for health hazard caused by environment is a norm to determie if a cerrtain factor in environental pollution area might constitute reasons for some health hazard of local population.That is one of the hygienic standard series for environmental health is China.This article dscribes the basic concept and content of the above-mentioned discriminant criteria.

This paper reports the effect of alpha-1-proteinase inhibitor on serums in rats exposed to ozone and cigarette somke. The result shows that the activity of alpha-1-proteinase inhibitor on serums may be decreased by exposing rats to ozone and cig-arett somke. When ozone content is up to 1.2?0.lPPm, the activity of alpha-1-prot-einase inhibitor may by obviously decreased.

In this report, smoke Producoed by common mosquito-repellent incense and electric heating mosquito(-)repellent incense was compare tested by the PC-2 model aerosol Particle analytical instrument made in California Measurements, in. U S A Aerosol of mosquito-repellent incense was analytical studied on aerosol size distribution and its Pouution level. The result showed that greater part particles pro-ducted by mosquito-repellent incense are less than 2 um small particle. Aerosol pollution in house caused by electric heating mosquito-repellent ineense is not notable. But aerosol pollution in house caused by C-mon mosquito-rpellent incense is very serious.

Weighing collected samPles to determine the IPS' content of indoor air and adopting the length of collecting time as 4 , 6and8 hours, the experimental accuracy and analytic errors were seParatdy analysed in different length of collecting time, as a result, when the IPS' content is less than 0.300mg.m-3, the smallest co-fficient of variation came from the statistic result of which its length of collecting time was 8 hours and in anaylsis its Permissible relative errors were not more than 10%, so it could be determined that the apporiate length of ccollecting time was 8 hours ( CIP

In order to the further prove the rela tions between the environmental pollution and the congenital deformities. We selected two villages in the Taiyuan Suburbs for our investigations. Wu village used the industrial sewages for irrigations and Ho village used the rainfall. All of the babies born during 1985.1.1-1988.12.31 were investigation. In Wu village the frequency of deformities was 67.42%. and in Ho village the frequency of deformities was 20.07%. The X2 significance test was 30.56 and P

This study reported that B ( a ) P determination was carried out in six barracks indoors and outdoors in Harbin, Changchun, Jinxi cities in winter and summer. The results showed; 1. the B ( a)P concentration was 0.00001-0.1796g/m3, detective rate was 100% in winter but o.0085g/m2 and 27.8% in summer. 2. the B ( a ) P concentration was gradually rising from morning to evening a day. However all of them remain whthin standard value. 3. the B ( a ) P concentration was 3.2, 46.0 and 43.3 times in old barracks as higher as new barracks respectively. 4. In winter, old barracks owing to warm by coat stove, the B ( a ) P concentration was a more than 200-fold increase over new barracks in summer. That suggested: the B ( a ) P increased was due to warming the room by coat stove.

We investigated the percipitation of airborne fungi particles with gravity plates at xidan area of Beijing. Our results show that, 1, The yearly average of the precipitation of airborne fungi particles is 11.0/dish. 5 min; 2,The highest precipitation occurs at 7:00 and 19:00 and the lowest precipitation at 4:00 and 13:00 in one day time; 3, The precipitation is high in the summer and low at the fall; 4, The significant difference of the precipitation between day and night is not observed in this study.

5um)were more.The material middle diameters(MMD)of samples all surpassed 5?m.

The hair arsenic levels of nonoccupq-tional esposed nornal subjects,aged 20~55 years,were analysed by neutron activation analysis in Shaoguan.The median and geometric mean are 0.121?g/g and 0.118?g/ g respectively.These results are lower than many other reports in China.This paper proposes the 95% upper Limit value of hair arsenic level is 0.320?g/g.

The evidence of smoking on cytomor-phologic changes has been shown.These changes are nuclear excrescences in pol-ymorphonuclear leukocytes among 163 male teachers aged 20 years and over.Rate of positive cytologies and arithmetic mean of nuclear excrescences was detected among current-smokers and accidental-smokers and nonsmokers.The result was established that significance and highly significance difference observed by statistical treatment.Relation of dose-resPonse was established between smoking amount and nuclear excrescences number,We believe this study indicates that these cytomorphologic changes are genotoxic effcts.Indices of nuclear excrescences test might be useful in studying smoking induced mutagenesis.