To examine the possibility of ear mushroom (EM) as a source of natural vitamin D, the UVB (ultraviolet B) was treated according to sample drying status, drying methods before UVB treatment and harvest time. And then, vitamin D2 and ergosterol contents were investigated. According to the sample drying status, the vitamin D2 contents of fresh and freeze-dried EM (whole) increased to 4,634.4~4,780.9 μg/100 g D.W. (dry weight) under UVB dose 52.5~70.0 kJ/m2 and above 18,693.1 μg/100 g D.W. under above 105 kJ/m2, respectively. By drying methods before UVB treatment, vitamin D2 contents of EM powder (below 500 μm) that dried in the vinyl house and freeze-dryer increased to 4,886.2~5,132.9 μg/100 g D.W. under above 105 kJ/m2 and 17,103.7 μg/100 g D.W. under 70 kJ/m2, respectively. Ergosterol content decreased with increasing UVB dose in all experiments. According to the harvest time, vitamin D2 content under UVB dose 210 kJ/m2 showed marked difference and in order of June, July, August, October and April. As for the results, the optimum harvest time, drying method before UVB treatment, sample size, UVB dose for the EM contained high vitamin D2 content were June, freeze-drying, whole, and 105 kJ/m2, respectively.

Abstract
서 론
재료 및 방법
    1. 실험재료
    2. 자외선 처리
    3. 건조분말의 색도 측정
    4. 건조분말의 비타민 D2 및 ergosterol 함량 분석
    5. 통계처리
결과 및 고찰
    1. 목이버섯 건조여부 및 자외선량별 품질특성
    2. 목이버섯 건조방법 및 자외선량별 품질특성
    3. 목이버섯 수확시기별 자외선 처리여부에 따른 품질특성
요약 및 결론
References

• 최소라(전라북도농업기술원) | So-Ra Choi (Jeollabukdo Agricultural Research & Extension Services) Corresponding author
• 신소희(전라북도농업기술원) | So-Hee Shin (Jeollabukdo Agricultural Research & Extension Services)
• 송영은(전라북도농업기술원) | Young-Eun Song (Jeollabukdo Agricultural Research & Extension Services)
• 한현아(전라북도농업기술원) | Hyun-Ah Han (Jeollabukdo Agricultural Research & Extension Services)
• 이송이(전라북도농업기술원) | Song-Yee Lee (Jeollabukdo Agricultural Research & Extension Services)
• 송은주(전라북도농업기술원) | Eun-Ju Song (Jeollabukdo Agricultural Research & Extension Services)