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모래의 입도분포가 모르터의 물성에 미치는 영향에 관한 연구
김경원,김문희,김유진,안흥난,허태경,현철 경성대학교 공학기술연구소 2010 공학기술연구지 Vol.16 No.-
Fineness Modulus is a term used as an index to the fineness of sand. It is well - known that the modulus distribution of sand plays an important role in achieving the desired properties of mortar. The maximum size of sand is also important parameter in mortar. These parameters affect workability, strength and unitweight of mortar. In tills study, different sand gradings were used to investigate effects of fineness moduli of sand for examination about the workability, strength and unit weight characteristics of cement mortar. Two kinds of sands with various size distribution and three kinds of fine aggregates with the similar particle size distribution (Sieve No.16~30, No.30~50, No.50~100) were used. Water-cement ratio (W/C) of mortar mix was kept constant for all the trial mixes with sand of different fineness modulus. Major findings of tills study are: (a) Fine sand with the similar size distribution reduces the workability and unit weight of cement mortar. (b) The compressive strength of mortar is not sensitive to sand grading variations. (c) The compressive strengths at the age of 28 days range from 32.1 to 54.1 MPa. (d) The sand with standard modulus distribution has better positive effects on the properties of the mortar.
Yoo, Hye Jin,Hong, Jin Pyo,Cho, Maeng Je,Fava, Maurizio,Mischoulon, David,Heo, Jung-Yoon,Kim, Kiwon,Jeon, Hong Jin Elsevier 2016 Journal of affective disorders Vol.203 No.-
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Major depressive disorder (MDD) is a well-known risk factor for suicidality, but depressed mood has been used non-specifically to describe the emotional state. We sought to compare influence of MDD versus sustained depressed mood on suicidality.</P> <P><B>Methods</B></P> <P>A total of 12,532 adults, randomly selected through the one-person-<I>per</I>-household method, completed a face-to-face interview using the Korean version of Composite International Diagnostic Interview (K-CIDI) and a questionnaire for lifetime suicidal ideation (LSI) and lifetime suicidal attempt (LSA).</P> <P><B>Results</B></P> <P>Of 12,361 adults, 565 were assessed as ‘sustained depressed mood group’ having depressed mood for more than two weeks without MDD (4.6%), and 810 adults were assessed as having full MDD (6.55%) which consisted of ‘MDD with depressed mood group’ (6.0%) and ‘MDD without depressed mood group’ (0.5%). The MDD with depressed mood group showed higher odds ratios for LSI and LSA than the sustained depressed mood group. Contrarily, no significant differences were found in LSI and LSA between the MDD group with and without depressed mood. MDD showed significant associations with LSI (AOR=2.83, 95%CI 2.12–3.78) and LSA (AOR=2.17, 95%CI 1.34–3.52), whereas sustained depressed mood showed significant associations with neither LSI nor LSA after adjusting for MDD and other psychiatric comorbidities. Interaction effect of sustained depressed mood with MDD was significant for LSI but not for LSA.</P> <P><B>Conclusions</B></P> <P>Sustained depressed mood was not related to LSI and LSA after adjusting for psychiatric comorbidities, whereas MDD was significantly associated with both LSI and LSA regardless of the presence of sustained depressed mood.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We sought to compare the influence of major depressive disorder (MDD) versus only sustained depressed mood on suicidality. </LI> <LI> MDD showed significant association with lifetime suicidal ideation (LSI) and lifetime suicide attempt (LSA), whereas sustained depressed mood showed significant association with neither LSI nor LSA. </LI> <LI> Interaction effect of sustained depressed mood with MDD was significant only for LSI. </LI> </UL> </P>
Mini-gel을 이용한 비방사성 SSCP의 위암 p53유전자 변이 검출
유경금(Kyung Kum Yoo),도재혁(Jae Hyuk Do),허철행(Cheol Heang Heo),문철(Cheol Moon),김형준(Hyung Jun Kim),이태진(Tae Jin Lee),유재형(Jae Hyeng Yoo),장진수(Jin Soo Chang),이상재(Sang Jea Lee),장세경(Sae Kyung Chang),박실무(Sill Moo Pa 대한소화기학회 1997 대한소화기학회지 Vol.29 No.5
N/A Background/Aims: p53 mutation was reported in many studies, but conventional PCR-SSCP protocol using radiolabeled PCR primers or nucleotides to generate a radioactive PCR products is cumbersome to handle. With the aim of a rapid and safe method for single-strand conformation polymorphism(SSCP) analysis of PCR products, we used Mini-SSCP method to detect the mutation of p53 gene of gastric cancer. Methods: In 27 pair of gastric cancer and normal tissues, PCR-SSCP was done with Mini-SSCP, and then Silver sequencing was done. Results: The p53 gene mutation of gastric cancer was found in 10 of 27(37%). Mutation of exon 4, 5 were 2, 5 cases and tnutation of exon 6, 7 mutation were 0, 3 cases respectively. Mutation rate was similar with other reports. P53 mutation was not correlated with stage, lymph node involvement and histological differentiation. Conclusions: Mini-SSCP method, modification of Cold-SSCP, greately increased our accessibility to detect polymorphisms with easiness and safeness. So, it is a useful method to detect genetic mutation. (Korean J Gastroenterol 1997;29:601-609)
Comprehensive code stroke program to reduce reperfusion delay for in-hospital stroke patients
Yoo, Joonsang,Song, Dongbeom,Baek, Jang-Hyun,Lee, Kijeong,Jung, Yohan,Cho, Han-Jin,Yang, Jae Hoon,Cho, Hyun Ji,Choi, Hye-Yeon,Kim, Young Dae,Nam, Hyo Suk,Heo, Ji Hoe SAGE Publications 2016 International journal of stroke Vol.11 No.6
Yoo Jeong Rae,Heo Sang Taek,Kim Misun,Kim Miyeon,Kang Myeong Jin,Kim Eui Tae,Kang Su Yeon,Lee Keun Hwa 대한의학회 2023 Journal of Korean medical science Vol.38 No.20
Background: Severe fever with thrombocytopenia syndrome virus (SFTSV) is transmitted through tick bites. Ticks are potential vectors for the bacterium Coxiella burnetii that causes Query fever. Here, we analyzed SFTSV and C. burnetii co-infection rates in ticks in rural areas of Jeju Island, South Korea. Methods: Free ticks were collected from the natural environment of the island between 2016 and 2019, and SFTSV RNA was extracted. Additionally, ribosomal RNA gene sequencing was used to identify Coxiella species. Results: Haemaphysalis longicornis was the most common tick species followed by H. flava. Tick number gradually increased from April, peaked in August, and was lowest in March. Of all the collected ticks, 82.6% (2,851/3,458) were nymphs, 17.9% (639/3,458) adults, and 0.1% (4/3,458) larvae. SFTSV-infected ticks comprised 12.6% of all ticks; their numbers were the lowest in November–December, increased from January, and were mostly identified in the adult stage during June–August. C. burnetii infections were detected in 4.4% of the SFTSVinfected H. longicornis ticks. C. burnetii co-infection was mainly observed in the nymph stage of H. longicornis, with the highest infection rate in January, followed by December and November. Conclusion: Our findings suggest that Jeju Island has a high SFTSV and potential C. burnetii infection in ticks. This study provides important insights regarding SFTS and Q fever risk to humans in South Korea.