Changes in physicochemical characteristics during fruit development in June-bearing strawberry cultivars

Changes in physicochemical characteristics were investigated during fruit development in 'Maehyang', 'Seolhyang', 'Keumhyang', 'Akihime', and 'Red Pearl' strawberries. Fresh weights and color parameters of strawberry fruits changed significantly during the fruit development in all cultivars. Fruit shapes of 'Maehyang' and 'Akihime' were conical, with an index of length to width being 1.5 and that of 'Seolhyang', 'Keumhyang', and 'Red Pearl' were cordate, the index being 1.3. Firmness decreased as the fruit developed in all cultivars. Contents of sugars, organic acids, ascorbic acid, and anthocyanin increased as the fruits developed while the ellagic acid content decreased. Sugars, ascorbic acid, and anthocyanin contents of 'Maehyang', 'Seolhyang', and 'Keumhyang' were higher than those of 'Akihime' and 'Red Pearl'. Results indicate that newly-bred Korean strawberry cultivars containing high levels of bioactive compounds were superior to major Japanese cultivars that have been broadly cultivated in East Asian countries.This work was carried out with the support of Cooperative Research Program for Agriculture Science & Technology Development (Project No. 907002082012)Rural Development Administration, Republic of Korea.OAIID:oai:osos.snu.ac.kr:snu2013-01/102/0000027607/1SEQ:1PERF_CD:SNU2013-01EVAL_ITEM_CD:102USER_ID:0000027607ADJUST_YN:YEMP_ID:A075898DEPT_CD:517CITE_RATE:0FILENAME:2013-2-heb-발달단계별딸기특성-김성겸.pdfDEPT_NM:식물생산과학부EMAIL:[email protected]_YN:NCONFIRM:

Antimicrobial Activity of Thinned Strawberry Fruits at Different Maturation Stages

Among the phenolic compounds that is generally present in strawberry fruits, five simple phenolics, three flavonoids, and a stilbene were tested for their antimicrobial activity against seven fungi and one oomycete. trans-Cinnamic acid showed strong antimicrobial activity, and the antimicrobial effect of the simple phenolics decreased with an increase in the number of hydroxyl groups. Phytophthora capsici was the most susceptible to the phenolic compounds tested in this study. trans-Cinnamic acid, p-hydroxybenzoic acid, and kaempferol were mainly detected in 'Seolhyang' strawberry fruits, and the total phenolic contents of the fruits decreased during their development. Extracts of the green #1-10% red color# and red #above 90% red color# strawberry fruits reduced the mycelial growth and zoospore germination rate of P. capsici, and the extract of red strawberry fruit showed strong antimicrobial activity against the zoospore germination of P. capsici. These results indicate that strawberry fruits contain antimicrobial phenolic compounds and that strawberry fruit extract can be used as a natural fungistat.OAIID:oai:osos.snu.ac.kr:snu2012-01/102/0000027607/6SEQ:6PERF_CD:SNU2012-01EVAL_ITEM_CD:102USER_ID:0000027607ADJUST_YN:YEMP_ID:A075898DEPT_CD:517CITE_RATE:.237FILENAME:2012-12-kjhst-딸기미식용과-항균활성-김동섭.pdfDEPT_NM:식물생산과학부EMAIL:[email protected]_YN:NCONFIRM:

Changes in Fruit Physicochemical Characteristics by Fruit Clusters in June-bearing Strawberry Cultivars

Three Korean-bred strawberry cultivars 'Maehyang', 'Seolhyang', and 'Keumhyang', and a Japanese cultivar 'Tochiotome' were grown in a greenhouse and their physicochemical characteristics were investigated. Fruit weight of 'Seolhyang' and 'Keumhyang' in the first and second fruit clusters were greater than those of other cultivars and that of 'Tochiotome' was the greatest in the fifth fruit cluster. Fruit firmness generally decreased at later fruit clusters, and was the lowest in 'Seolhyang'. The sugars/organic acids ratios in the first and third fruit clusters of 'Maehyang' were 4.9 and 8.0, respectively, representing the highest values among all cultivars. The ascorbic acid content was the greatest in the second fruit cluster for 'Seolhyang', 'Keumhyang', and 'Tochiotome' cultivars and that of 'Maehyang' was the greatest at the third fruit cluster. The anthocyanin content was higher in later fruit clusters and was the highest in 'Keumhyang' overall. Results indicate that Korean cultivars bred for the plastic protected culture, which are intended for very early harvest, showed more desirable physical characteristics in the first and second fruit clusters, while the content of anthocyanin was greater in the fruits from later fruit clusters.This work was carried out with the support of Cooperative Research Program for Agriculture Science & Technology Development (Project No.907002082012) Rural Development Administration, Republic of Korea.OAIID:oai:osos.snu.ac.kr:snu2012-01/102/0000027607/5SEQ:5PERF_CD:SNU2012-01EVAL_ITEM_CD:102USER_ID:0000027607ADJUST_YN:YEMP_ID:A075898DEPT_CD:517CITE_RATE:.237FILENAME:2012-8-kjhst-딸기과방별물리확학적특징-김성겸.pdfDEPT_NM:식물생산과학부EMAIL:[email protected]_YN:NCONFIRM:

Tuberculosis prevention and care in Korea: Evolution of policy and practice

Tuberculosis (TB) in Korea remains a serious health problem with an estimated 77 per 100,000 incidence rate for 2016. This makes Korea as the only OECD country with high incidence of TB. The government has increased budgets and strengthened patient management policies since 2011. The management of latent tuberculosis was added to the response with strengthened and extensive contact investigations in the five-year tuberculosis control plan (2013–2017) and implementation was established in 2013. Due to these efforts Korea has achieved an average 5.2% reduction annually in tuberculosis incidence rate between 2011 and 2016. To further expedite the reduction of the TB burden the government has introduced additional measures including mandatory screening of latent tuberculosis infection for community workers in congregate settings including daycare centers for children, kindergarten, and teachers in schools and health care workers in clinics and hospitals to solve the problems identified through contact investigations in 2017.Providing high quality free diagnosis and treatment of active TB including for multidrug resistant TB combined with active contact investigations is the mainstay of the current programmatic response in Korea. However, the limitation of existing tools for LTBI pose challenge including absence of best mechanism for effective communication with professionals and the public, the need for at least 3 months of treatment and the risk of side effects. Developing effective tools will help to overcome these challenges. Keywords: Tuberculosis, Latent tuberculosis infection, End TB, Contact investigations, Epidemiolog