Adsorption technology can effectively handle the volatile organic compounds (VOCs) from waste gas. However the adsorption of VOCs at elevated temperature (>30oC) and high humidity conditions results in competitive adsorption between VOCs and the moisture. Furthermore, physical adsorption at an elevated temperature is the cause of degradation in the regeneration process performance. In this study, toluene as waste organic solvent in air at elevated temperature and high humidity was used to measure performance. The effects of the SiO2/Al2O3 ratio of zeolites, the adsorbent material coated on adsorption regenerative rotors, on the adsorption performance of toluene with respect to temperature (30~50oC) and relative humidity (50~90%RH) have been investigated. The adsorption of toluene decreased as relative humidity and adsorption temperature rose. The result shows that Htype ZSM5 (SiO2/Al2O3=100) zeolite exhibited the highest adsorption capacity for toluene at elevated temperature and humidity conditions. The physical and chemical adsorption of toluene on acid sites of zeolite were confirmed by this study.

The aim of the study was to investigate the ability of sperm derived from the epididymis in regard to sperm motility, sperm penetration to oocyte and subsequent development of the embryo. Frozen-thawed sperm from epididymis showed similar percentage of motile sperm (VSL ≥ 25 μm/sec) as compared to that of commercial sperm (control). Sperm penetration of frozen-thawed epididymal and commercial sperm was not significantly different. Moreover, cleavage and blastocyst rates were similar in both epididymal and control. Sperm derived from the epididymis also showed fertilizability and subsequent embryonic development

The objective of this study was to investigate the interrelationship of weight and hormonal changes through the administration of vitamin A to first time pregnant heifers. A total of 28 Korean heifers was used for this study. The heifers were divided into two groups - with vitamin A (n=14) and without vitamin A (control) (n=14) in the feed. Body weight increased in vitamin A treated heifers starting 9 months until 15 months. After pregnancy, vitamin A treated heifers were found to maintain higher body weights than the control group. Pre-pregnancy and post pregnancy progesterone levels were not different between the two groups. Serum estradiol levels of heifers at different growth stages showed relatively higher E2 levels than the control. Also, the control during pregnancy may show higher serum E2 levels than the vitamin A treated heifers. The growth phase serum estradiol levels in heifers may be relatively higher than the control. During pregnancy it showed a similar trend. Serum levels of vitamin A treated heifers did not differ from pregnant heifers at 5 months of age. However, after 5 months from conception until 8 months of treatment it showed a high level. Serum cholesterol in pregnant cows was higher in the control group than the treatment from beginning until the end of pregnancy. This is considered to be related to fetus development during pregnancy, as well as the mother's health.