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Damages of Young Persimmon Tree as Affected by Application of Immature Liquid Pig Manure
Choi, Seong-Tae,Park, Yeo-Ok,Ahn, Gwang-Hwan,Kim, Eun-Gyeong,Son, Ji-Young,Joung, Wan-Kyu,Hong, Kwang-Pyo The Korean Society of Environmental Agriculture 2019 한국환경농학회지 Vol.38 No.2
BACKGROUND: Liquid pig manure (LPM) has been used as an alternative for conventional fertilizers on some gramineous crops. However, its chemical properties varied widely depending on the degree of the digestion. A pot experiment was conducted to determine the responses of persimmon trees to immature (not well-digested) LPM application. METHODS AND RESULTS: Ten application levels of immature LPM, consisted of a total of 3 to 30 L in 3-L increment, were applied during summer to 5-year-old 'Fuyu' trees grown in 50-L pots. Increasing the LPM application rate caused defoliation, wilting, and chlorosis in leaves. When applied with the rate of 3 L during summer, the tree produced small fruits with low soluble solids and bore few flower buds the following season, indicating insufficient nutritional status. In trees applied with the LPM rates of 6~12 L, both fruit characteristics and above-ground growth of the trees appeared normal but some roots were injured. However, application of higher LPM rates than 27 L resulted in small size, poor coloration, or flesh softening of the fruits the current season. Furthermore, the high LPM rates caused severe cold injury in shoots during winter and weak shoot growth the following season. It was noted that the application of higher LPM rate than 9 L damaged the root, even though above-ground parts of the tree appeared to grow normally. CONCLUSION: The results indicated that an excessive immature LPM application could cause various injuries on leaves, fruits, and the roots in both the current and the following season.
Choi, Su Jin,Kwon, Jung Eun,Roh, Da Eun,Hyun, Myung Chul,Jung, Han Na,Lee, Young Ok,Cho, Joon Yong,Kim, Yeo Hyang The Korean Pediatric Society 2020 Clinical and Experimental Pediatrics (CEP) Vol.63 No.5
Background: The decision to use transannular patching (TAP) during tetralogy of Fallot (TOF) repair depends on the pulmonary valve annulus size; the z score of the pulmonary annulus is the most commonly used predictor. However, definitive results are not obtained with z scores as different z score data sets are used for different parameters. Purpose: This study aimed to identify the echocardiographic and other key factors that warranted a change in the surgical method during TOF surgery. Methods: Sixty-two patients were enrolled and divided into a pulmonary valve (PV) preservation group and a TAP group. Their medical records were reviewed. Results: The z score for PV annulus (PVA), ratio of the PVA to aortic annulus size, and ratio of PVA to descending aorta (DAO) size were significantly different between the PV preservation and TAP groups (-1.72±1.52 vs. -3.07±1.94, P=0.004; 0.62±0.12 vs. 0.50±0.14, P=0.002; and 1.32±0.32 vs. 1.07±0.36, P=0.008, respectively). For TAP repair, the PVA z score had a sensitivity of 65.4% and specificity of 73.1%, ratio of PVA to aortic annulus size had a sensitivity of 73.1% and specificity of 65.4%, and ratio of PVA to DAO size had a sensitivity of 69.2% and specificity of 57.7%. The TAP group showed more monocuspid PVs (P=0.011), while the PV preservation group showed more tricuspid PVs (P=0.027). Commissurotomy was more frequently performed in the PV preservation group than in the TAP group (P=0.001). Of patients with commissurotomy, 58% showed a PV z score<-2. Conclusion: Although various echocardiographic parameters may serve as predictors for determining surgical methods for TOF patients, the PV morphology and tissue characteristics should also be considered.
( Yeo-ok Park ),( Hee-jeong Jae ),( Ji-young Shon ),( Seong-tae Choi ),( Sung-chul Kim ),( Yong-cho Cho ),( Kwang-pyo Hong ),( Younghoon Park ) 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.3
Persimmon (Diospyros kaki Thunb.) is classified into four types based on the fruit traits, astringency and flesh color. Of the four types, the pollination-constant non-astringent (PCNA) fruit is typically most desirable for consumption. In the present study, we used five sequence characterized amplified region (SCAR) markers associated with astringency in persimmon fruit, namely E4/E9r, E4/A2r, 7H9F/AST-R, AST-F/AST-R, and AST-F/PCNA-F/5R3R, to improve the efficiency of PCNA-type persimmon breeding via marker-assisted selection (MAS). A total of 84 cultivars of the four types and their segregating F1 progeny were used to evaluate the association of SCAR markers with the fruit astringency phenotype. Polymerase chain reaction evaluation of each SCAR marker showed that E4/E9r combined with AST-F/PCNA-F/5R3R was appropriate for selecting the ast allele responsible for PCNA-type fruit, as the phenotype-genotype match percentages of these two markers were 94% and 99%, respectively. This MAS was verified by the successful use of AST-F/PCNA-F/5R3R to select 107 PCNA-type individuals from 609 F1 hybrid progeny derived from various crosses.
Reduction of Calbindin D-28k-Immunoreactive Neurons in the Dog Dentate Gyrus
CHOI, Jung Hoon,HWANG, In Koo,YOO, Ki-Yeon,YI, Sun Shin,PARK, Ok Kyu,LEE, Choong Hyun,YOON, Yeo Sung,WON, Moo-Ho Japanese Society of Veterinary Science 2009 The Journal of veterinary medical science Vol.71 No.8
<P>The calcium binding protein calbindin D-28k (CB) plays an important role in modulating the activity of neurons in the dentate gyrus. We observed CB immunoreactivity in the dentate gyrus of dogs of various ages (German shepherds). In the 1-year-old group, CB immunoreactivity was detected in almost all of granule cells with poor processes. In the 8-year-old group, the number of CB-immunoreactive <SUP>(+)</SUP> neurons in the granule cell layer was significantly reduced (73.2% vs. 1-year-old group), while CB<SUP>+</SUP> cell bodies and fibers were well developed. In the 10-year-old group, the number of CB<SUP>+</SUP> neurons was further reduced by 31.3% when compared to that in the 1-year-old group. This finding demonstrates that the number of CB<SUP>+</SUP> neurons decreases in the aged dog brain and this may be associated with reduction of function in the dentate gyrus.</P>
Choi, Dae-Hyun,Yeo, Chan-Hyeok,Kim, Jean-Tae,Ok, Chi-Won,Kim, Jong-Seok,Kwon, Yongchai,Im, Yeon-Ho IOP 2009 JOURNAL OF MICROMECHANICS AND MICROENGINEERING - Vol.19 No.7
<P>This paper reports the results of a systematic study of bisbenzocyclobutene (BCB) bonding for a Si-based miniaturized reformer system. The micro reformer system, which included microchannels with a depth and a width of 250 µm and 600 µm, respectively, was fabricated using conventional semiconductor processing and BCB bonding. The structural, thermo-mechanical and chemical stability of Pyrex to Si wafer bonding using BCB as an adhesive was examined at temperatures up to 350 °C. The BCB interfaces at the Pyrex to Si wafer bonding pairs were mechanically stable to withstand the typical pressure and temperature conditions of the reforming process (1 atm and 300 °C) with little outgassing during reforming at 1 atm and 300 °C. The thermo-mechanical and chemical stability during wafer bonding and during reforming was examined using an optical inspection, and pressure pop-up test, FTIR test and gas chromatograph (GC) test were performed. The results showed that Pyrex to Si wafer bonding using BCB is suitable for a miniaturized reformer in fuel systems.</P>
Influence of HMDS additive on the properties of YAG:Ce nanophosphor
Choi, Kyu-Man(최규만),Kim, Yeo-Hwan(김여환),Lim, Hae-Jin(임해진),Yoon, Sang-Ok(윤상옥) 한국정보전자통신기술학회 2011 한국정보전자통신기술학회논문지 Vol.4 No.1
YAG:Ce 형광제 제조에 있어서 공침(co-precipitation) 후 n-butanol 공비증류(azeotropic distillation)시 HMDS(hexadimethyldisilazane)를 첨가하였을 때, 형광체가 광학특성에 미치는 영향에 관하여 연구하였다. 물과 유기용제에 의한 공비증류 시 유기용제의 분자량이 크면 표면의 수소결합이 유기용제로 치환됨으로서 표면장력을 감소시켜 분체의 원형화(conglobation)와 응집(agglomerate)을 감소시키므로 유기용제로 n-butanol보다 분자량이 큰 HMDS을 첨가하였다. N-butanol 만을 사용한 형광체가 HMDS를 첨가한 것 보다 응집(agglomerate)되는 현상이 감소하였으며 우수한 광학적 특성을 나타내었다. Influence of hexamethyldisilazane(HMDS) in post processing technique by using n-butanol azeotropic distillation on the luminescence properties of YAG:Ce nanophosphor were studied. The organic solvent(n-butanol) azeotropic distillation which prevent powders from conglobation since lager molecules decrease the surface tension and more complete replace the residual water in the precipitate. HMDS that had larger molecules than that of n-butanol was added in azeotropic distillation. The phosphor synthesized from n-butanol azeotropic distillation exhibited lower agglomerate and better photoluminescence properties than that from HMDS added heterogeneous azeotropic distillation.
단감 품종 판별을 위한 single nucleotide polymorphism 마커 적용 검정
박여옥(Yeo Ok Park),최성태(Seong-Tae Choi),손지영(Ji-Young Son),김은경(Eun-Gyeong Kim),안광환(Gwang-Hwan Ahn),박지혜(Ji Hae Park),정완규(Wan-Kyu Joung),장영호(Young Ho Jang),김동완(Dong Wan Kim) 한국생명과학회 2020 생명과학회지 Vol.30 No.7
최근 next-generation sequencing technology의 발달로 유전체 분석 사례는 증가하고 있으나, 단감에 있어 적용가능한 Single Nucleotide Polymorphism (SNP) 마커 및 적용 결과는 거의 없는 실정이다. 이에 우리나라 고유떫은감 5품종으로부터 개발된 SNP primer 들을 단감 품종에 적용하여 사용 가능성을 검증하고자 수행하였다. Jung 등에 의해 개발된 19개 SNP primer들의 PCR 조건을 확인 한 후 본 실험의 전기영동 방식으로는 분석이 매우 어려웠던 8개의 primer를 제외한 11개의 SNP primer들을 최종 선발하였다. 1, 2차 검증을 통해 최종 선발된 11개의 SNP primer 들을 76품종 및 계통(불완전단감 20, 완전단감 30, 완전떫은감 20, 불완전떫은감 6)에 적용한 결과 38품종 및 계통(불완전단감 8, 완전단감 18, 완전떫은감 9, 불완전떫은감 3품종)은 각 품종 및 계통 간 구분을 할 수가 없었다. 그러나 최종 선발된 11개의 SNP primer 들을 신품종에 적용한 결과만를 보면 ‘감누리’, ‘단누리’, ‘홍추’와 ‘자미시’, ‘미감조생’을 동시에 구분할 수 있어 단감 신품종 판별을 위한 특이적 마커로 사용될 수 있을 것으로 판단된다. The recent development of next-generation sequencing technology has enabled increased genomic analysis, but very few single nucleotide polymorphism (SNP) markers applicable to sweet persimmon (Diospyros kaki Thunb.) cultivars have been identified. In this study, SNP primers developed from five pollination-constant astringent (PCA) persimmons native to Korea were applied to discriminate between cultivars and verify their usability. The polymerase chain reactions of 19 SNP primers developed by Jung et al. were checked, with 11 primers finally selected. The other eight were very difficult to analyze in the agarose gel electrophoresis and QIAxcel Advanced System used in this experiment and were therefore excluded. The 11 SNP primers were applied through first and second verification to 76 cultivars and collection lines including 20 pollination-variant non-astringent (PVNA), 30 pollination- constant non-astringent (PCNA), 20 PCA, and six pollination-variant astringent (PVA). Of these, 38 were indistinguishable (eight PVNA, 18 PCNA, nine PCA, and three PVA). However, the results of applying the 11 SNP primers to new sweet persimmon cultivars, namely Gamnuri, Dannuri, Hongchoo, Jamisi, and Migamjosaeng, showed that they have the potential to be used as a unique marker for simultaneously determining between them.
General Characteristics of Korean Propolis
( Soon Ok Woo ),( Sang Mi Han ),( Inpyo Hong ),( Yong Soo Choi ),( Kwang Gill Lee ),( Joo Hong Yeo ),( Hae Yongkweon ),( Myoung Ryeol Lee ),( Man Young Lee ) 한국잠사학회 2012 International Journal of Industrial Entomology Vol.25 No.2
The propolis was collected from the whole part of Korea Peninsula, such as central, southern, and Jeju island, to analyze the general composition includingtotal flavonoid and phenolic contents, heavy metals, colors, amino acids, and crude lipid. The total flavonoid and phenolic contents of middle region in Korea Peninsula (4.26% and 13.06 g/100 g gallic acid) were higher than southern region (2.53%, 10.9 g/100 g gallic acid) and Jeju island (0.03%, 7.22g/100 g gallic acid), respectively. The heavy metals contents showed that Zn contents were found in 0.44±0.2 ppm and a harmful heavy metal such as Cr, Cd, Pb, Ni, Cu, As, and Hg were not detected at all in our experiment. The colors of extracted propolis showed a various spectrum from yellow to red purple. Various amino acids were also detected as proline, valine, methionine and the average crude lipid contents of propolis were 42.4%. All data collected in South Korea were very first executed in our institution for the purposes of utilizing and developing the industrial insects, honeybees as well as silkworm.