기후변화는 곤충의 성장, 발육, 생존, 생식력, 분포범위 등 생활사의 변수들에 영향을 준다. 특히 외래곤충의 경우 생태계 정착 및 확산이 빨라 지고 있으며, 생태계 교란, 토착종 감소 등 생물다양성을 감소시키는 직접적인 원인 중 하나이다. 알팔파바구미는 1990년대 제주도에서 처음 발견 후 남부지방에 대량 발생하여 농업해충으로 인식되었다. 최근 하면처로 이동하는 개체에 의한 밭작물의 피해와 여러 시군에서 서식이 확인되며 확산의 우려되고 있다. 본 연구에서는 기후변화가 알팔파바구미에 미치는 영향에 대해 파악하였다. 미래의 기후 시나리오 RCP 4.5와 RCP 8.5에서 알팔파바구미의 잠재적 분포를 추정하기 위해 MaxEnt 모델을 적용하였다. 모형의 변수는 2015~2017년까지 알팔파바구미의 서식이 확인된 66개 지점과 종의 생태특성 및 예측변수간 상관성을 고려한 6개(bio3, bio6, bio10, bio12, bio14, bio16)의 생물기후를 사용하였다. 예측된 모형의 적합 도는 평균 0.765로 잠재력이 의미 있는 값이며, 최고 따뜻한 분기의 평균기온(bio10)이 60~70%로 높은 기여도를 나타냈다. 2050년과 2070년의 시나리오(RCP 4.5, RCP 8.5)에 대한 모형의 결과는 한반도 전역에서 알팔파바구미의 분포 변화를 보여 주었으며, 기온상승에 따른 전국적 확산이 예측되었다.

목 적: 저시력자의 연령과 성별을 포함한 일반적인 특성과 의료이용에 관한 현황을 파악하고자 하였다. 방 법: 한국의료패널 자료를 이용하여 2010년 17,885명과 2011년 17,035명을 대상자로 하였다. 저시력 자의 일반적인 특성은 성별, 연령, 결혼유무, 가구 소득수준, 교육수준, 의료보험의 종류와 경제활동 유무를 조사하였다. 의료이용 현황으로는 응급실과 입원 유무, 국공립 여부와 의료기관의 종류에 대해 파악하였다. 또한 저시력자들이 생각하는 의료서비스 체계에 대한 전반적인 만족도와 문제점을 분석하였다. 결 과: 저시력자는 남자가 44.7%, 여자가 55.3%였고(p=0.944), 연령대별로는 0~20세 미만이 22.2%, 20~29세가 5.2%, 30~39세가 4.7%, 40~49세가 4.1%, 50~59세가 21.6%, 60~69세가 17.5% 그리고 70세 이상이 24.7%를 보였다(p=0.022). 가구소득에 따른 저시력자는 하위 1분위수와 2분위수가 각각 31.3%와 30.1%로 가구소득이 낮을수록 저시력자가 많이 발생하였다(p=0.001). 저시력자들의 의료이용에 대한 현황은 1년에 평균 2.48번의 외래를 방문하였고, 10.9%가 응급실을 이용하였다. 의료서비스 체계에 대하여 저시력자들은 69.7%가 잘 작동하고 있다고 응답하였고, 국가전체의 의료비 지출과 긴 대기시간을 현재 보건의료 체계의 문제점으로 들었다. 결 론: 소득수준이 낮을 경우와 70세 이상의 노인층과 함께 젊은 연령층에서도 저시력의 발생이 높은 것 으로 나타났다. 따라서 이들의 의료접근성을 높이기 위해서 의료이용 양상의 결정요인에 대한 파악이 필요 할 것으로 생각된다.

Imagined ethnic ties and affinities have funneled many Koryŏ saram into South Korea—the divided homeland of their ancestors—as coethnic labor migrants and foreign spouses over the past decade. Based on in-depth interviews with ten Uzbekistan-born Koryŏ saram women who currently reside in South Korea with their Korean husbands and children, this paper examines intersections of gender and ethnicity in the women’s migratory paths and life experiences in the employment and family spheres. After contextualizing the ensuing influx of Koryŏ saram to South Korea from the perspectives of ethnic (return) migration and marriage migration, this study looks into how the ten informants’ skills are devalorized as coethnic migrants who lack Korean language skills but appear “Korean” to contemporary South Korean people. This research also investigates the ways that the incipient Koryŏ saram community allows them to seek new employment opportunities while juggling between work and family as a married migrant with children. By examining two salient social differentiations in (social) mobility of Koryŏ saram, this paper not only betokens the social position of Koryŏ saram in South Korea, but also underscores the agency of the coethnic migrant women who struggle to pursue inclusion in the affluent homeland.

The circadian clock control of CONSTANS (CO) transcription and the light regulation of CO stability coordinately regulate photoperiodic flowering by triggering rhythmic expression of the floral integrator FLOWERING LOCUS T (FT). The diurnal pattern of CO accumulation is modulated sequentially by distinct E3 ubiquitin ligases, such as HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENES 1 (HOS1) in the morning, FLAVIN-BINDING, KELCH REPEAT, F-BOX 1 (FKF1) in late afternoon, and CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) at night. In particular, CO is stabilized by FKF1 in late afternoon only under long days. Here, we show that CO abundance is not simply regulated by the E3 enzymes in a passive manner but also self-regulated actively through dynamic interactions between two CO isoforms. CO alternative splicing produces two protein variants, the full-size COa and the C-terminally truncated COb. Notably, COb, which is resistant to the E3 enzymes, induces the interactions of COa with CO-destabilizing HOS1 and COP1 but inhibits the association of COa with CO-stabilizing FKF1. These observations demonstrate that CO plays an active role in sustaining its diurnal accumulation dynamics in Arabidopsis photoperiodic flowering.

Regulation of fruit ripening may help extend fruit shelf life and prevent losses due to spoilage. Here, we investigated whether sound treatment could delay tomato fruit ripening. We treated harvested tomato fruits with low-frequency sound waves (1 kHz) for 6 h, and then monitored various characteristics of the fruits over 14-day period at 23±1°C. Seven days after the treatment, 85% of the treated fruits were green, versus fewer than 50% of the non-treated fruits. Most of the tomato fruits had switched to the red ripening stage by 14 days after treatment. Ethylene production and respiration rate were lower in the treated than non-treated tomatoes. Furthermore, changes in surface color and flesh firmness were delayed in the treated fruits. To investigate how sound wave treatment affects fruit ripening, we analyzed the expression of ethylene-related genes by quantitative real-time RT-PCR analysis. We found that the expression level of several ethylene biosynthetic and ethylene signaling pathway-related genes was influenced by sound wave treatment. These results demonstrate that sound wave treatment delays tomato fruit ripening by altering the expression of important genes in the ethylene biosynthesis and ethylene signaling pathways.

Regulation of fruit ripening may help extend fruit shelf life and prevent losses due to spoilage. Here, we investigated whether sound treatment could delay tomato fruit ripening. We treated harvested tomato fruits with low-frequency sound waves (1 kHz) for 6 h, and then monitored various characteristics of the fruits over 14-day period at 23±1°C. Seven days after the treatment, 85% of the treated fruits were green, versus fewer than 50% of the non-treated fruits. Most of the tomato fruits had switched to the red ripening stage by 14 days after treatment. Ethylene production and respiration rate were lower in the treated than non-treated tomatoes. Furthermore, changes in surface color and flesh firmness were delayed in the treated fruits. To investigate how sound wave treatment affects fruit ripening, we analyzed the expression of ethylene-related genes by quantitative real-time RT-PCR analysis. We found that the expression level of several ethylene biosynthetic and ethylene signaling pathway-related genes was influenced by sound wave treatment. These results demonstrate that sound wave treatment delays tomato fruit ripening by altering the expression of important genes in the ethylene biosynthesis and ethylene signaling pathways.

Regulation of fruit ripening may help extend fruit shelf life and prevent losses due to spoilage. Here, we investigated whether sound treatment could delay tomato fruit ripening. We treated harvested tomato fruits with low-frequency sound waves (1 kHz) for 6 h, and then monitored various characteristics of the fruits over 14-day period at 23±1°C. Seven days after the treatment, 85% of the treated fruits were green, versus fewer than 50% of the non-treated fruits. Most of the tomato fruits had switched to the red ripening stage by 14 days after treatment. Ethylene production and respiration rate were lower in the treated than non-treated tomatoes. Furthermore, changes in surface color and flesh firmness were delayed in the treated fruits. To investigate how sound wave treatment affects fruit ripening, we analyzed the expression of ethylene-related genes by quantitative real-time RT-PCR analysis. We found that the expression level of several ethylene biosynthetic and ethylene signaling pathway-related genes was influenced by sound wave treatment. These results demonstrate that sound wave treatment delays tomato fruit ripening by altering the expression of important genes in the ethylene biosynthesis and ethylene signaling pathways.