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Extraction of Eu-152, Nd and Am-241 from the Simulated Liquid Wastes by Picolinamide$(C_8H_{17})$
Kwon, Seon-Gil,Lee, Eil-Hee,Yoo, Jae-Hyung,Park, Hyun-Soo,Kim, Jong-Seung Korean Nuclear Society 1999 Nuclear Engineering and Technology Vol.31 No.5
Trivalent actinide-lanthanide group separation is difficult to perform on an industrial scale, because of the many drawbacks of the available chemical process. In this paper, picolinamide(C$_{8}$H$_{17}$) is synthesized and characterized, and extraction yields of Am-241, Eu-152 and Nd are determined in batch extraction experiments. In particular, the influence of the solvent is described. The extraction yields of Am-241, Eu-152 and Nd depended on the LiNO$_3$ concentration, the picolinamide(C$_{8}$H$_{17}$) concentration and the acidity. A favorable picolinamide(C$_{8}$H$_{17}$) concentration was found to be about 2M. The appropriate nitric acid concentration and LiNO$_3$ concentration were confirmed to be about 0.125M and 3M, respectively. The separation factor of Am and Eu was about 9.9 at optimum conditions. The picolinamide(C$_{8}$H$_{17}$) is a very promising extractant for the actinide(III)-lanthanides(III) separation.aration.aration.
Il-Kwon Park,Seon-Mi Seo,Junheon Kim,Sang-Gil Lee,Chong-Kyu Lee,Sang-Chul Shin 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
Nematicidal activity of aliphatic compounds was tested against pien wood nematode, Bursaphelenchus xylophilus. There was a significant difference in nematicidal activity among function groups. In a test with alkanols and 2-alkenols, compounds with C8-C11 chain length showed 100% nematicidal activity at 0.5 mg/mL concentration. C6-C10 2-alkenals exhibited >95% nematicidal activity, but the other compounds with C11-C14 chain length showed weak activity. Nematicidal activity of alkanoic acids with C7-C11 chain length was strong. Whole compounds belonging to hydrocarbons, alkanals and alkanoic acetate showed weak nematicidal activity at 0.5 mg/mL concentration. Nematicidal activity of compounds which showed strong nematicidal activity at 0.5 mg/mL concentration was tested at a lower concentration. At 0.25 mg/mL concentration, whole compounds except C8 alkanol, C8 2-alkenol and C7 alkanoic acid showed >80% nematicidal activity. C9-C11 alkanols, C10-C11 2-alkenols, C8-C9 2-alkenals and C9-C10 alkanoic acids showed >80% nematicidal activity at 0.125 mg/mL concentration. Only C11 alkanol exhibited strong nematicidal activity at 0.0625 mg/mL concentration
Kwon, Oh Chan,Lee, Sang-Won,Park, Yong-Beom,Oh, Ji Seon,Lee, Sang Hoon,Hong, Seokchan,Lee, Chang-Keun,Yoo, Bin,Kim, Yong-Gil BioMed Central 2018 ARTHRITIS RESEARCH AND THERAPY Vol.20 No.-
<P><B>Background</B></P><P>Takayasu arteritis (TAK) is a systemic disease characterized by large vessel involvement. Although the vascular characteristics of TAK are well characterized, there is no well-organized study demonstrating the extravascular manifestations of TAK. We aimed to evaluate the characteristics of extravascular manifestations of TAK, and to identify the association between vascular and extravascular manifestations of TAK.</P><P><B>Methods</B></P><P>TAK patients from two independent cohorts between January 2012 and October 2017 were included in the study. Patient characteristics were retrospectively collected from the electronic dataset. The computed tomography scans of all subjects were reviewed to evaluate the pattern of vascular involvement and presence of sacroiliitis. Clinical findings including uveitis, skin lesions, oral ulcers, arthritis, and inflammatory bowel disease (IBD) were reviewed. Logistic regression analysis was performed to evaluate the association between vascular and extravascular manifestations.</P><P><B>Results</B></P><P>For the 268 TAK patients, the mean age at diagnosis was 41.2 ± 14.2 years and 88.1% were female. The extravascular manifestation of TAK was observed in 19.0% of patients, the most common being arthritis including sacroiliitis (11.9%) followed by recurrent oral ulcers (8.6%) and IBD (2.6%). A multivariate logistic regression analysis revealed type IIB vascular involvement (adjusted odds ratio (OR) 2.956, 95% confidence interval (CI) 1.337–6.537, <I>p</I> = 0.007) and the erythrocyte sedimentation rate (ESR) (adjusted OR 1.014, 95% CI 1.003–1.025, <I>p</I> = 0.012) as significantly associated with the presence of axial and peripheral arthritis.</P><P><B>Conclusions</B></P><P>Extravascular manifestations of TAK were observed in up to one-fifth of patients. The most common extravascular manifestation was arthritis, which was associated with a type IIB vascular involvement pattern and a high ESR.</P>
권선길,유재형,황두성,정동용,이일희 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5
차아인산을 이용하여 모의 폐액에 함유된 팔라듐을 선택적으로 환원 침전시키는 연구를 수행하여 얻은 결과는 다음과 같다. 팔라듐을 환원 침전시키기 위해서는 차아인산 농도가 약 0.03-1.0M, 질산농도가 약 1.0M, 정치시간이 48시간 이내가 좋았다. 이 조건에서 팔라듐의 침전율을 99% 이상이었으며, 공존원소인 로듐, 루테늄, 세슘, 니켈과 철들은 거의 침전되지 않았으나 스트론튬만이 약 25% 침전되었다. 그리고 팔라듐의 침전율은 차아인산 농도가 증가함에 따라 증가하고, 질산농도가 증가하면 감소하였다. The separation of palladium from the simulated liquid wastes was experimentally examined in a reduction process with hypophosphorous acid. The obtained main results were as follows: A favorable hypophosphorous acid concentration region was found to be from 0.03 M to 1.0 M, The appropriate nitric acid concentration was confirmed to be about 1.0 M. The suitable stagnant time was found to be within 48 hours. The precipitation fraction of palladium in the simulated liquid wastes was determined to be over 99%. The precipitation fraction af other elements(Rh, Ru, Cs, Ni and Fe) in the simulated liquid wastes was extremely low, and that of Sr was about 25%. The precipitation fraction of palladium was improved with increasing hypophosphorous acid concentration and decreasing nitric acid concentration.
질소 주개 추출제에 의한 악티나이드 및 란탄나이드 분리
권선길,유재형,이일희 한국공업화학회 1998 응용화학 Vol.2 No.1
The extracting properties of TPTZ (2, 4, 6 - tri (2-pyridyl) - 1, 3, 5 - triazine) were investigated. The extraction yields of actinide and lanthanide depended on the TPTZ concentration, the HDNNS (dinonylnaphthalenesulfonic acid) concentration and the acidity. A favorable TPTZ concentration was found to be about 0.032M. The appropriate nitric acid concentration and HDNNS concentration were confirmed to be about 0.125M and 0.05M, respectively.
Intercellular Trafficking of Homeodomain Proteins
Kim, Seon-Won,Moon, Ju-Yeon,Jung, Jin-Hee,Chen, Xiongyan,Shi, Chunlin,Rim, Yeong-Gil,Kwon, Hey-Jin,David Jackson,Raju Datla,Alain Joliot,Kim, Jae-Yean Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.
Homeotic proteins have pivotal roles during the development of both plant and animals. Many homeotic proteins exert control over cell fate in cells where their genes are not expressed, I.e., in a non-cell autonomous manner. Cell-to-cell communication, which delivers critical information for position-dependent specification of cell fate, is an essential biological process in multicellular organisms. In plants, there are two pathways for intercellular communication that have been identified: the ligand/receptor-mediated apoplastic pathway and the plasmodesmata-mediated symplasmic pathway. Regulatory proteins and RNAs traffic symplasmically via plasmodesmata and play a critical role in intercellular communication. Thus, the non-cell autonomous function of homeotic proteins can be explained by the recent discovery of cell-to-cell trafficking of proteins of RNAs. This article specifically focuses on understanding the intercellular movement of homeodomain proteins, a family of homeotic proteins.
Kang, Gil Myoung,Han, Yu Mi,Ko, Hyuk Whan,Kim, Joon,Oh, Byung Chul,Kwon, Ijoo,Kim, Min-Seon American Society for Biochemistry and Molecular Bi 2015 The Journal of biological chemistry Vol.290 No.29
<P>Terminally differentiated neurons have a single, primary cilium. The primary cilia of hypothalamic neurons play a critical role in sensing metabolic signals. We recently showed that mice with leptin deficiency or resistance have shorter cilia in the hypothalamic neurons, and leptin treatment elongates cilia in hypothalamic neurons. Here, we investigated the molecular mechanisms by which leptin controls ciliary length in hypothalamic neurons. In N1 hypothalamic neuronal cells, leptin treatment increased the expression of intraflagellar transport proteins. These effects occurred via phosphatase and tensin homolog/glycogen synthase kinase-3β-mediated inhibition of the transcriptional factor RFX1. Actin filament dynamics were also involved in leptin-promoted ciliary elongation. Both leptin and cytochalasin-D treatment induced F-actin disruption and cilium elongation in hypothalamic neurons that was completely abrogated by co-treatment with the F-actin polymerizer phalloidin. Our findings suggest that leptin elongates hypothalamic neuronal cilia by stimulating the production of intraflagellar transport proteins and destabilizing actin filaments.</P>
Intercellular Trafficking of Homeodomain Proteins
Kim, Seon-Won,Moon, Jun-Yeon,Jung, Jin-Hee,Chen, Xiongyan,Shi, Chunlin,Rim, Yeong-Gil,Kwon, Hey-Jin,Jackson, David,Datla, Raju,Joliot, Alain,Kim, Jae-Yean The Korean Society of Plant Pathology 2005 Plant Pathology Journal Vol.21 No.1
Homeotic proteins have pivotal roles during the development of both plant and animals. Many homeotic proteins exert control over cell fate in cells where their genes are not expressed, i.e., in a non-cell autonomous manner. Cell-to-cell communication, which delivers critical information for position-dependent specification of cell fate, is an essential biological process in multicellular organisms. In plants, there are two pathways for intercellular communication that have been identified: the ligand/receptor-mediated apoplastic pathway and the plasmodesmata-mediated symplasmic pathway. Regulatory proteins and RNAs traffic symplasmically via plasmodesmata and play a critical role in intercellular communication. Thus, the non-cell autonomous function of homeotic proteins can be explained by the recent discovery of cell-to-cell trafficking of proteins or RNAs. This article specifically focuses on understanding the intercellular movement of homeodomain proteins, a family of homeotic proteins.