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        검색결과 6

        1.
        2023.10 구독 인증기관·개인회원 무료
        The cherry tree borer, Synanthedon bicingulata (Staudinger, 1887), is considered as a tree boring pest boring into cambium layer and weakens the tree. Cherry trees, the host species of S. bicingulata, are the most abundant ornamental trees in South Korea. However, there has been insufficient study conducted on ornamental trees compared to orchards. The study aimed to investigate the injury patterns caused by their larvae based on height and direction they faced. Since life cycle of S. bicingulata in Gangwon province had not been surveyed, occurrence pattern was also investigated using sex attractant. Injury patterns of 253 cherry trees in Chuncheon, were surveyed in April 2023. As a result, the injury occuring under 1 m in height was 2.61 times more extensive than injury between 1m and 2m in height of trunk. Also, the injury on the south-faced trunks was 2.68 times larger than on the north-faced trunks.
        2.
        2009.12 구독 인증기관 무료, 개인회원 유료
        The purpose of this study is to evaluate the effects of alcohol or cigarette smoking on seminal parameters in a large group of mice model. Nine groups (n=20/group) of mice were treated intensive noxious materials that abdominal injection of 21% (v/v) of ethanol, cigarette smoke (10, 20, 30 minutes/day), and combination of ethanol and 30 minutes of smoking. In addition, vitamin C and selenium were also treated to mice exposed to combination of alcohol and smoking to identify the recovering effect. Sperm viability and motility were significantly decreased in either alcohol consumption or smoking exposed group, and combination of both materials have additive detrimental effects on seminal parameters. Mice groups that exposed to alcohol and smoking showed statistically significant decrease in motility and increase of static spermatozoa. Moreover, combination of both treatments showed cumulative effect in increase of static spermatozoa. Treatments of either vitamin C or selenium dramatically recovered detrimental effects of alcohol and smoking on seminal quality, although combination of both antioxidant molecules did not show any additive effect. In conclusion, detrimental effects of alcohol and cigarette consumption on sperm quality and motility were identified in mice model, and these detrimental effects can be compensated to uptake of anti‐oxidant molecules.
        4,000원