Effect of Thinning on Defoliated ‘Fuyu’ Persimmon on Fruit and Tree Development in the Current and the Following Years

Seong-Tae Choi,Seong-Mo Kang,Sung-Chul Kim,Hag-Kyu Kim,Won-Doo Song 한국원예학회 2005 Horticulture, Environment, and Biotechnology Vol.46 No.1

Questions arise as to what to do with the fruits of persimmon trees when they are severely defoliated by a typhoon early in the season. In this study, the leaves of 5-year-old, field-grown ‘Fuyu’ trees were defoliated 75% on Sept. 3, 1999 and Sept. 6, 2001. Zero (control), 25, 50, and 75% of their fruits were then thinned on these trees, changing the leaf-to-fruit ratio to about 5, 7, 10, and 20, respectively. The ratio of non-defoliated intact trees was maintained at 20 throughout the season. Fruit weight and color increased to the level of intact trees when fruit thinning exceeded 25%, although the leaf-to-fruit ratio was as low as 7. On the other hand, fruit soluble solids responded poorly to the increase in fruit thinning on defoliated trees; even a 75% thinning could not restore them to the level of intact trees. Results suggested that fruit thinning could improve fruit size and color, but have a limited impact in increasing fruit soluble solids when the trees had lost 75% of their leaves in early September. In the following year, measurements of shoot growth, leaf area, fruit set, and fruit characteristics did not show consistent differences attributable to the thinnings on 75%-defoliated trees the previous year.

Unveiling the Intrinsic Cycle Reversibility of a LiCoO₂ Electrode at 4.8-V Cutoff Voltage through Subtractive Surface Modification for Lithium-Ion Batteries

Seong, Won Mo,Yoon, Kyungho,Lee, Myeong Hwan,Jung, Sung-Kyun,Kang, Kisuk American Chemical Society 2019 NANO LETTERS Vol.19 No.1

<P>The thermodynamic instability of the LiCoO<SUB>2</SUB> layered structure at >0.5Li extraction has been considered an obstacle for the reversible utilization of its near theoretical capacity at high cutoff voltage (>4.6 V vs Li/Li<SUP>+</SUP>) in lithium-ion batteries. Many previous studies have focused on resolving this issue by surface modification of LiCoO<SUB>2</SUB>, which has proven to be effective in suppressing phase transformation. To determine the extent to which surface protection of LiCoO<SUB>2</SUB> is effective despite its thermodynamic instability and presumably incomplete reversibility involving the O1 phase, here we verify the intrinsic reversibility of bulk LiCoO<SUB>2</SUB> with extended lithium extraction by ruling out the effect of a surface. Specifically, first, we show that, contrary to conventional belief, electrochemical cycling of LiCoO<SUB>2</SUB> at a cutoff voltage of 4.8 V (vs Li/Li<SUP>+</SUP>) results in better cycle stability and lower polarizations than those at 4.6 V. We demonstrate, using an exhaustive suite of characterization tools, that the rapid cycle degradation under high-voltage cycling is mostly caused by the formation of a surface resistive layer; however, these damaged surfaces are leached out faster than they are accumulated above a certain potential, which results in superior cyclability compared with that achieved for less oxidative 4.6-V cycling. This beneficial leaching out of the resistive surface layer serves as a “subtractive” surface modification and plays a role in enhancing the cycle stability and is distinguished from conventional “additive” surface modification such as coating. This approach allows us to decouple factors of the bulk and surface degradations that contribute to the capacity fade and leads to the finding that, in the absence of a resistive surface, the capacity retention of a LiCoO<SUB>2</SUB> electrode with 4.8-V cutoff cycling can be intrinsically high, indicating that the instability of the crystalline Li<SUB><I>x</I></SUB>CoO<SUB>2</SUB> (<I>x</I> < 0.5) has a limited effect on the cycle stability. Our findings also explain why the strategy of coating foreign materials on the surface of LiCoO<SUB>2</SUB> can improve the high-voltage cycling to some extent despite the expected thermodynamic instability of the highly charged phase.</P> [FIG OMISSION]</BR>

Early Performance of ‘Uenishiwase’ Persimmon Trees on a Y-trellis Training System

Seong-Tae Choi,Won-Doo Song,Gil-Man Shon,Chi-Woong Rho,Seong-Mo Kang 한국원예학회 2005 Horticulture, Environment, and Biotechnology Vol.46 No.4

Applicability of Y-trellis system to high density persimmon was evaluated for 7 years after planting. Twoyear- old trees of ‘Uenishiwase’ (Diospyros kaki) were planted at a row spacing of 6 m in spring of 1996. Tree spacing within a row was 3 m for modified-leader (ML) and 1.5 m for Y-trellis. It was apparent from 2000 that the increase in trunk cross-sectional area (TCSA) was less in the Y-trellis than in the ML trees. The TCSA of the Y-trellis trees was 19% smaller in 2002 than that of the ML trees. On the other hand, the trees spreaded more in Y-trellis trees. Due to higher planting density and wider tree-spread of the Y-trellis, the cumulative yield per hectare from 1998 to 2002 was 29.4 tons for the Y-trellis trees, a 1.6-fold increase over the ML trees. Light penetration was 10.2% more in the Y-trellis trees. However, there was no consistent difference in fruit characteristics between the two training systems of young trees in this experiment. Despite a higher occurrence of water sprouts in Y-trellis trees on a scaffold limb or land area basis, the results of this study indicated the potential benefits of Y-trellis system for early production of persimmon.

Intramolecular Carbocyclization of Allenoate-aldehydes with Hexamethylditin Catalyzed by Palladium Complex: Synthesis of Cyclic Dienes

Seong, Won-Jae,Gong, Su-Yeon,Woo, Seok-Hoon,Yu, Chan-Mo Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.3

DESIGN OF A TERRESTRIAL DMB INTERNAL ANTENNA FOR MOBILE PHONE HANDSETS

Won-Mo Seong,Gi-Ho Kim,Hong-Pyo Chun,Ha-Sun Na,Seong-Bin Lim,Hak-Keun Choi 대한전자공학회 2006 ITC-CSCC :International Technical Conference on Ci Vol.2006 No.3

Abnormal self-discharge in lithium-ion batteries

Seong, Won Mo,Park, Kyu-Young,Lee, Myeong Hwan,Moon, Sehwan,Oh, Kyungbae,Park, Hyeokjun,Lee, Sechan,Kang, Kisuk The Royal Society of Chemistry 2018 ENERGY AND ENVIRONMENTAL SCIENCE Vol.11 No.4

<P>Lithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising electrochemical performance, the low self-discharge rate (<5% of the stored capacity over 1 month) of lithium-ion batteries is one of their most significant advantages for ESSs. Herein, contrary to conventional belief, we report that the self-discharge of LIBs can be abnormally accelerated when the battery has been exposed even to a routine short-term thermal exposure. We demonstrate that this thermal ‘history’ in addition to the temperature itself is memorized in the battery and accelerates the self-discharge rate. The series of characterizations performed in our work reveal that the electrolyte salt acts as a strong oxidizing agent by vigorously damaging the surface of the cathode, producing an internal ‘parasitic’ lithium source that continuously supplies lithium for the self-discharge. Although it is widely known that battery operation at elevated temperature generally induces faster degradation of capacity over multiple cycles, the key finding here is that not only the operation temperature but also the ‘thermal history’ of the battery should be carefully considered because this history remains and continues to affect the self-discharge rate afterwards. The self-discharge of LIBs has remained largely neglected; however, our findings suggest that close attention must be paid to the self-discharge of LIBs applied to large-scale ESSs, which, unlike mobile electronic devices, will be exposed to various outdoor temperature conditions.</P>

첨가물질의 급여가 홀스타인 거세우의 발육, 도체특성에 미치는 영향

Won Mo Cho(조원모),Sung Hak Yang(양승학),Sang Min Lee(이상민),Sun Sik Jang(장선식),Hyeong Cheol Kim(김형철),Seong Koo Hong(홍성구),Woon Yeoul Park(박웅렬),Hyun Soo Kim(김현수) 한국생명과학회 2012 생명과학회지 Vol.22 No.2

본 연구는 육질향상을 위한 여러가지 첨가물질을 홀스타인 거세우의 성장과 도체특성에 미치는 급여효과를 구명하기 위해 수행하였다. 생후 5개월령 평균체중 176.6 ㎏, 홀스타인 거세우 24두를 3처리 8반복으로 완전 임의 배치하여 사양시험을 수행하였다. 처리구는 대조구(무첨가구), T1 (Vitamin C, 아연 및 유황 급여구) 및 T2 (콜린 및 라이신 급여구)로 배치하였다. 일당증체량은 육성기와 비육전기에서는 처리구별 차이가 없었지만, 비육후기에서는 T1처리구가 T2 처리구보다 유의적으로 높았다(p<0.05). T1 처리구의 출하체중은 다른 처리구 보다 비교적 높았지만 유의적 차이는 없었다. 첨가제는 시험기간 동안 섭취량에 있어 영향을 주지는 않았지만, 비육후기 T1 처리구의 사료요구율이 T2 처리구 보다 유의적으로 낮았다. 육량특성에 있어 도체중 및 육량지수는 그룹간 비슷한 결과를 나타내었지만, 등지방 두께 및 등심단면적은 다른 처리구에 비해 T2 처리구가 비교적 낮았다. 육질특성에서는 육색, 조직감 및 성숙도는 세 처리구에서 유의적 차이를 나타내지 않았지만, 근내지방도 및 육질1등급이상 출현율에 있어서 T2 처리구와 비교하여 T1처리구가 높았다. 따라서, 본 연구의 결과 비타민 C, 아연, 유황 첨가는 홀스타인 거세우의 성장 및 도체특성을 향상시키는 것으로 생각된다. This study was performed to investigate the feeding effects of different additives on the growth performance and carcass characteristics of Holstein steers. Twenty-four Holstein steers, five months of age and 176.6 ㎏, were randomly allocated to three experimental groups of eight animals each for an 18-month feeding trial. The groups were control (not additive), T1 (fed zinc, vitamin C, and sulfur), and T2 (fed choline and lysine). The average daily gain was no different between the treatment groups during the growing to early fattening period, but it was significantly higher in the T1 group than the T2 group in the late fattening period (p<0.05). The final BW of the T1 group was relatively high in relation to the other groups, but was not significantly different. The additives had no effects on DMI during the experimental period; however, the feed conversion ratio of the T1 group in the late fattening period was significantly lower than that of the T2 group (p<0.05). The results of yield traits, carcass weight, and yield index were similar between groups, but back fat thickness and rib eye area were relatively lower in the T2 group than in the other groups. In terms of quality traits, meat color, texture, and maturity were not significantly different between the three groups. However, marbling score and appearance rate of high quality grade (1??, 1?, and 1) were higher in the T1 group compared with the T2 group. Thus, the present results suggest that vitamin C, zinc, and sulfur supplementation may improve the growth performance and carcass characteristics of Holstein steers.

A Study on Improvement of Distribution Facility in Wholesale Agricultural Products Market

Won-Mo Gal,Ki-Tae Kwon,Woo-Sik Lee,Eun-Mee Choi,Lee-Seung Kwon,Seung-Hwan Seong,권우택 한국유통과학회 2018 유통과학연구 Vol.16 No.2

Purpose - The purpose of this study is to investigate the effect of gamma - irradiation on the effluent from food distribution in the large agricultural and marine products market. This study will contribute to the distribution process as well as the agricultural and fishery distribution facilities. Research design, data, and methodology - In order to reduce the odor, the smell was examined in the anaerobic digestion process by irradiating gamma rays to the wastewater of mixed food discharged from a large restaurant. An odor determination panel list was constructed to determine if the odor was present in the air dilution drainage and the odor concentration was analyzed by instrumental analysis. Results - It was confirmed that the sulfur content increased gradually from 3 months. Ammonia decreased from 33.57ppm at the initial measurement to 4.12 ppm at the end of the experiment. Methane production was highest at 100kGy when exposed to gamma rays of 0-200kGy at pH 12. In other words, it is considered that gamma irradiation doses are most effective at 100kGy and are suitable for large capacity wastewater treatment facilities in terms of economic feasibility. Conclusions - In pre-treatment of compound food wastewater, gamma irradiation is most cost effective when examined at 100kGy. The economic efficiency of the pre-treatment method by gamma irradiation is much higher than the wastewater treatment in the large-scale agricultural and marine products distribution market.

Effect of Different Severities of Summer Pruning on Fruit Characteristics and Tree Growth in Young ‘Fuyu’ and ‘Nishimurawase’ Persimmon

Seong-Tae Choi(최성태),Seong-Mo Kang(강성모),Doo-Sang Park(박두상),Won-Doo Song(송원두),Gwang-Hwan Ahn(안광환) 한국원예학회 2003 Horticulture, Environment, and Biotechnology Vol.44 No.5

S-463 Simultaneous presentation of ANCA-associated vasculitis and lung cancer

( Mo Ah Jeong ),( Se Won Oh ),( Han Seong Kim ) 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1

Anti-neutrophil cytoplasmic antibody associated vasculitis (AAV) is associated with increased risk of malignancy. Malignancy is frequently diagnosed after the treatment of AAV and cytotoxic agent is considered as cause of cancer development. However, simultaneous presentation of AAV and lung cancer is very rare. A 68-year-old woman referred with fever and general weakness. Serum creatinine (SCr) was 1.9 mg/dl, and increased to 3.3 mg/dl within 2 weeks. Proteinuria (1.4 g/day), hematuria, MPO-ANCA (>600EU) and ANA (1:640) were detected. Kidney biopsy showed pauci-immune crescentic glomerulonephritis (Fig. A). At the same time, a 2.6 cm sized nodule on right upper lung was detected, and it was confirmed as adenocarcinoma (T2N0M0, stage Ib) (Fig.B). She was treated with high dose corticosteroid with plasmapheresis. Azotemia was progressed and hemodialysis was maintained for 4 weeks. CMV pneumonia was developed, and she was treated with ganciclovir. After the AAV and ganciclovir treatment, SCr was improved to 2.83 mg/dl. The size of lung nodule was not increased significantly on follow-up CT scan. Lobectomy was done, and pathologic staging was pT1bN1M0. However, she died after surgery due to pneumonia septic shock. Although lung involvement is a common clinical feature of AAV, malignancy should be considered in patients with lung nodule at the diagnosis of AAV. And, decision about treatment priority might be critical to determine the prognosis in patients with simultaneous presentation of AAV and lung cancer.