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Solar urticaria in Korean patients
( Sung Min Kim ),( Young Ah Cho ),( Ji Su Lee ),( Ji Youn Hong ),( Jin Hee Kim ),( Joo Ran Hong ),( Hye In Cheon ),( Yang Won Lee ),( Yong Beom Choe ),( Kyu Joong Ahn ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1
Background: Solar urticaria (SU) is an uncommon type of photodermatoses characterized by erythematous wheal with pruritus after sunlight exposure, which shows a female predominance. Only a few studies to analyze the clinical features of SU were reported in Asia. Objectives: We aimed to analyze the clinical and photobiological characteristics of SU in Korea. Methods: We retrospectively investigated the medical records of patients with SU who visited the department of dermatology, Konkuk university medical center from January 2005 to January 2020. Results: Of a total of 44 patients, 36 (81.8%) were male and 8 (18.2%) were female. The mean age at onset was 17.6 years (range, 5-47) and the mean threshold time was 19.7 minutes. Among 32 patients who underwent phototesting, the action spectrum most commonly implicated was ultraviolet (UV) A only in 12 (37.5%), and then visible light (415nm) only was responsible for SU in 8 (25.0%). Three patients (9.4%) were induced by both UVA and visible light (415nm). Even 4 patients (12.5%) were triggered by only natural sunlight. Serum immunoglobulin E levels were measured in 33 patients, and 17 (51.5%) showed values higher than normal. The treatment most widely used were oral antihistamine (43.2%), followed by phototherapy (13.6%). Conclusion: SU is a rare photodermatosis in Korea, which shows a male preponderance. In this study, UVA and visible light (415nm) were predominant action spectrum of SU.
Influence of Probiotics-Friendly Pig Production on Meat Quality and Physicochemical Characteristics
Sung Yong Chang,Shah Ahmed Belal,Da Rae Kang,Yang Il Choi,Young Hoon Kim,Ho Sung Choe,Jae Young Heo,Kawn Seob Shim 한국축산식품학회 2018 한국축산식품학회지 Vol.38 No.2
In this study, the dietary effects of probiotics with a liquid application system on meat quality and physicochemical characteristics of pigs were evaluated. A total of 80 Landrace×Yorkshire×Duroc (LYD) 3-way crossbred pigs (average age 175±5 d) were assigned to a conventional farm and a probiotics farm equipped with a liquid probiotics application system (40 pigs in each farm). The two treatments were: CON (diet without probiotics) and PRO (diet with probiotics). Dietary probiotics decreased shear force in the longissimus muscle compared to the control group (p<0.05). The treatment diet did not affect backfat thickness, carcass weight, meat color, cooking loss, water holding capacity (WHC), and drip loss. Dietary probiotics significantly reduced ash, salinity, and pH (at 5 and 15 d) (p<0.05). There was no significant effect on thiobarbituric acid reactive substance (TBARS) values. Polyunsaturated fatty acid (PUFA) and omega fatty acids (ω3 and ω6) were significantly (p<0.05) higher in the PRO group, whereas monounsaturated fatty acid (MUFA) was decreased. The free amino acid composition, serine, lysine, histidine, and arginine levels were significantly lower in the PRO than in the control group. The treatment group exhibited higher nucleotide compounds (hypoxanthine, inosine, GMP, IMP) than the controls. Also, levels of ascorbic acid and thiamin were significantly different (p<0.05), while minerals were not significantly different between the groups. In conclusion, feeding of probiotics had effects on shear force, ash, salinity, pH, PUFA, and some amino acids which related to taste and flavor without any negative effects on the pigs’ carcass traits.
( Sang Yoon Jeon ),( Ji Hyun Choe ),( Sang Eun Lee ),( Jae Hong Park ),( Si Ra Bang ),( Yong Han Kim ) 대한통증학회 2011 The Korean Journal of Pain Vol.24 No.4
Surgical excision was performed on a 30-years old woman with a painful mass on her left thigh. The pathologic findings on the mass indicated fibromatosis. After the operation, she complained of allodynia and spontaneous pain at the operation site and ipsilateral lower leg. We treated her based on postoperative femoral neuropathy, but symptom was aggravated. We found a large liposarcoma in her left iliopsoas muscle which compressed the lumbar plexus. In conclusion, the cause of pain was lumbar plexopathy related to a mass in the left iliopsoas muscle. Prompt diagnosis of acute neuropathic pain after an operation is important and management must be based on exact causes.
Development of a Welding Machine System Using Brown Gas by Improved Water Electrolyzation
Yong-Kyun Lee,Sang-yong Lee,Byung-Hwan Jeong,Hyung-Soo Mok,Gyu-Ha Choe 전력전자학회 2005 JOURNAL OF POWER ELECTRONICS Vol.5 No.4
Throughout the world, studies on the water energization are currently under way. Of those, Brown gas, which is generated through the electrolyzation of water and is a mixed gas of the constant volume of 2 parts hydrogen to 1 part oxygen, has better characteristics in terms of economy, energy efficiency, and environmental affinity than those of acetylene gas and LPG (Liquefied Petroleum Gas) used for existing welding machines. This paper analyzes the characteristics of Brown gas and presents methods for increasing the generating efficiency of Brown gas by designing a power supply to deliver power to a water-electrolytic cell and designing a cylindrical electrode to improve the efficiency of the electrolyzer needed for water electrolyzation. Based on the above the methods, a welding machine using Brown gas is developed. And the generation efficiency of Brown gas is measured under different conditions (duty ratio, frequency and amplitude) of supplied power.
( Sung Min Kim ),( Ji Su Lee ),( Ji Youn Hong ),( Jin Hee Kim ),( Joo Ran Hong ),( Hye In Cheon ),( Min Seok Hur ),( Yang Won Lee ),( Yong Beom Choe ),( Kyu Joong Ahn ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2
Background: Atopic keratoconjuctivitis (AKC) is an allergic ocular diasese which cause severe damage to cornea and vision loss. AKC is associated with atopic dermatitis (AD), so alteration of conjuctival microbiome may be associated with immunologic imbalance. Objectives: We analyzed floral communities of conjuctiva in patients with AKC, and compared those in healthy induviduals. Methods: 16S ribosomal ribonucleic acid (rRNA) gene sequencing and data processing were used to aquire library of compositional information of patients with AKC and healthy individuals. The microbial and mycobial communities of conjuctiva in AKC were charaterized by average taxonomic composition, relative abundance and diversity analysis. Results: In AKC patients, the conjuctival taxonomic composition is more diverse than those in healthy individuals. Beta diversity in patients with AKC was higher compared to healthy control group. Conclusion: Composition and diversity of microbial and mycobial communities in AKC patients were different from those of healthy individuals. Although the bacterial genus that cause AKC is not uncertain, alteration of conjuctival microbiome in AKC patients may have an effect on local immunologic dysfunction in AD. Our findings suggested dysbiosis in AKC patients can be associated with mucosal barrier dysfunction as same as in AD patients.
Choe, Chang-Yong,Kim, Jung-Gon,Cho, Sang-Rae,Son, Dong-Soo,Kim, Young-Keun,Balasubramanian, S,Choe, Sang-Yong,Rho, Gyu-Jin Blackwell Verlag GmbH 2006 Reproduction in domestic animals Vol.41 No.1
<P>Contents</P><P>The success of AI technology is based on both semen quality and freezing process. In order to establish the semen freezing techniques in Korean native bucks, factors affecting the success were evaluated in the present study. Semen collected by electro-ejaculation from bucks during four distinct seasons was evaluated for semen volume and pH, sperm motility and survivability. The semen volume, concentration and total cell were higher in spring, summer and less in winter. Yet, there were no seasonal differences in the proportional data of live sperm, motility score and pH of semen among seasons. The percentage of live sperm after thawing was found to increase with increased concentration of lactose in Tris-Egg yolk-glycerol (TY-G), being highest in TY-G supplemented with 180 m<SMALL>M</SMALL> lactose (TYL180-G), but did not differ between TY-G and TYL120-G. Sperm motility was enhanced by employing 2.0 h equilibration time with rapid freezing method. In conclusion, semen could be frozen with high success rates for further use of AI in breeding techniques and to preserve the Korean native bucks.</P>
Bartholdi zeta and <i>L</i>-functions of weighted digraphs, their coverings and products
Choe, Young-Bin,Kwak, Jin Ho,Park, Yong Sung,Sato, Iwao Elsevier 2007 Advances in mathematics Vol.213 No.2
<P><B>Abstract</B></P><P>Since a zeta function of a regular graph was introduced by Ihara [Y. Ihara, On discrete subgroups of the two by two projective linear group over <I>p</I>-adic fields, J. Math. Soc. Japan 19 (1966) 219–235], many kinds of zeta functions and <I>L</I>-functions of a graph or a digraph have been defined and investigated. Most of the works concerning zeta and <I>L</I>-functions of a graph contain the following: (1) defining a zeta function, (2) defining an <I>L</I>-function associated with a (regular) graph covering, (3) providing their determinant expressions, and (4) computing the zeta function of a graph covering and obtaining its decomposition formula as a product of <I>L</I>-functions. As a continuation of those works, we introduce a zeta function of a weighted digraph and an <I>L</I>-function associated with a weighted digraph bundle. A graph bundle is a notion containing a cartesian product of graphs and a (regular or irregular) graph covering. Also we provide determinant expressions of the zeta function and the <I>L</I>-function. Moreover, we compute the zeta function of a weighted digraph bundle and obtain its decomposition formula as a product of the <I>L</I>-functions.</P>