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Electrostabilized homogeneous dispersion of boron nitride nanotubes in wide-range of solvents achieved by surface polarity modulation through pyridine attachment

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Nano Research 2020年第2期13卷 344-352页

作者： Mi Se Chang Min-Sun jang Sangsun Yang Jihun Yu Taehoon Kim Sedong Kim Hyomin Jeong Chong Rae Park jae Won Jeong Powder/Ceramic Research Division Korea Institute of Materials Science797 Changwondae-roSeongsan.guChangwon 51508Republic of Korea Research Institute of Advanced Materials and Department of Materials Science and Engineering Seoul National University Seoul 08826Republic of Korea Composites Research Division Korea Institute of Materials Science797 Changwondae-roSeongsan-guChangwon 51508Republic of Korea Dept.of Energy and Mech.Eng Gyeongsang National UniversityCheondaegukchi-Gil 38Tongyeong 53064Republic of Korea

Boron nitride nanotubes(BNNTs)show exceptional physical properties including high mechanical strength and thermal conductivity;however,their applications have been restricted due to limited dispersibility in processing ***,a novel BNNT dispersion method with exceptional dispersibility in a wide range of solvents has been demonstrated by surtace polarity modulation through short-molecule pyridine *** atoms in pyridine are selectively bonded to electron-deficient boron atoms of the BNNT surface through Lewis acid-base reaction,which changes the surface polarity of BNNTs from neutral to ***-dispersing pyridine-attached BNNTs(Py-BNNTs)create a thick and stable electronic double layer(EDL),resulting in uniform dispersion of BNNTs in solvents with an exceptional solubility parameter range of 18.5-48 MPa^1/*** uniform dispersion of BNNTs is maintained even after the mixing with diverse ***,composites incorporating uniformly-distributed BNNTs have been realized,and extraordinary property enhancements have been *** thermal conductivity of 20 wt.%Py-BNNT/epoxy composite has been significantly improved by 69.6%and the tensile strength of 2 wt.%Py-BNNT/PVA has been dramatically improved by 75.3%.Our work demonstrates a simple and facile route to dispersing BNNTs in diverse solvents,consequently leading to selective utlization of BNNT dispersed solvents in various application fields.

关键词： boron nitride nanotube one-dimensional nanomaterials surface polarity modulation electrostabilization boron nitride nanotube composite

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Clinical significance of loss of heterozygosity for M6P/IGF2R in patients with primary hepatocellular carcinoma

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World Journal of Gastroenterology 2008年第9期14卷 1394-1398页

作者： Hong Seok jang Ki Mun Kang Byung Ock Choi Gyu Young Chai soon Chan Hong Woo Song Ha Randy L Jirtle Department of Radiation Oncology The Catholic University of Korea School of Medicine SeoulKorea Department of Radiation Oncology Gyeongsang National University Postgraduate School of MedicineGyeongsang Institute of Health Sciences Jinju 660-702Korea Department of Radiation Oncology The Catholic University of Korea School of MedicineSeoulKorea Department of Radiation Oncology Gyeongsang National University Postgraduate School of MedicineGyeongsang Institute of Health SciencesJinju 660-702 Korea Department of Surgery Gyeongsang National UniversityPostgraduate School of MedicineJinju 660-702Korea Department of Surgery Gyeongsang National University Postgraduate School of MedicineJinju 660-702Korea Department of Radiation Oncology Duke University Medical CenterDurhamNCUnited States

AIM:To investigate the relationship between loss of heterozygosity (LOH) for mannose 6-phosphate/insulin- like growth factor 2 receptor (M6P/IGF2R) and the outcomes for primary HCC patients treated with partial hepatectomy. METHODS: The LOH for M6P/IGF2R in primary HCC patients was assessed using six different gene-specific nucleotide polymorphisms. The patients studied were enrolled to undergo partial hepatectomy. RESULTS: M6P/IGF2R was found to be polymorphic in 73.3% (22/30) of the patients, and of these patients, 50.0% (11/22) had tumors showing LOH in M6P/IGF2R. Loss of heterozygosity in M6P/IGF2R was associated with significant reductions in the two year overall survival rate (24.9% vs 65.5%; P = 0.04) and the disease-free survival rate (17.8% vs 59.3%; P = 0.03). CONCLUSION: These results show M6P/IGF2R LOH predicts poor clinical outcomes in surgically resected primary HCC patients.

关键词： Loss of heterozygosity Mannose 6-phosphate/ insulin-like growth factor 2 receptor Hepatocellular

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Design of small-area and high-efficiency DC-DC converter for 1 T SRAM

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Journal of Central South University 2012年第2期19卷 417-423页

作者： LEE jae-hyung 金丽妍余忆宁 jang Ji-hye KIM Kwang-il HA Pan-bong KIM Young-hee Department of Electronic Engineering Changwon National University9 Sarim-Dong

The direct current-direct current （DC-DC） converter is designed for 1 T static random access memory （SRAM） used in display driver integrated circuits （ICs）, which consists of positive word-line voltage （VpwL）, negative word-line voltage （VinyL） and half-VDD voltage （VHDo） generator. To generate a process voltage temperature （PVT）-insensitive VpWL and VNWL, a set of circuits were proposed to generate reference voltages using bandgap reference current generators for respective voltage level detectors. Also, a VOWL regulator and a VNWL charge pump were proposed for a small-area and low-power design. The proposed VpwL regulator can provide a large driving current with a small area since it regulates an input voltage （VCI） from 2.5 to 3.3 V. The VmvL charge pump can be implemented as a high-efficiency circuit with a small area and low power since it can transfer pumped charges to VNWL node entirely. The DC-DC converter for 1 T SRAM were designed with 0.11 μm mixed signal process and operated well with satisfactory measurement results.

关键词： 1 T-static random access memory direct current-direct current converter positive word-line voltage negative word-line voltage half- VDb generator

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Correlation of fatty liver and abdominal fat distribution using a simple fat computed tomography protocol

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World Journal of Gastroenterology 2011年第28期17卷 3335-3341页

作者： Seonah jang Chang Hee Lee Kyung Mook Choi Jongmee Lee jae Woong Choi Kyeong Ah Kim Cheol Min Park Department of Radiology Korea University Guro HospitalKorea University College of Medicine Department of Internal Medicine (Division of Endocrinology and Metabolism) Korea University Guro HospitalKorea University College of Medicine

AIM: To evaluate the relationship between hepatic fat infiltration and abdominal fat volume by using computed tomography (CT).METHODS: Three hundred and six patients who visited our obesity clinic between November 2007 and April 2008 underwent fat protocol CT *** age range of the patients was 19 to 79 years and the mean age was 49 *** male to female ratio was 116:*** and spleen attenuation measurements were taken with three regions of interests (ROIs) from the liver and two ROIs from the *** attenuation indices (HAIs) were measured as follows: (1) hepatic parenchymal attenuation (CTLP);(2) liver to spleen attenuation ratio (LS ratio);and (3) difference between hepatic and splenic attenuation (LSdif).Abdominal fat volume was measured using a 3 mm slice CT scan starting at the level of the umbilicus and was automatically calculated by a *** fat was classified into total fat (TF),visceral fat (VF),and subcutaneous fat (SF).We used a bivariate correlation method to assess the relationship between the three HAIs and TF,VF,and ***: There were significant negative correlations between CTLP,LS ratio,and LSdif with TF,VF,and SF,*** CTLP showed a strong negative correlation with TF and VF (r = -0.415 and -0.434,respectively,P < 0.001).The correlation between CTLP and SF was less significant (r = -0.313,P < 0.001).CONCLUSION: Fatty infiltration of the liver was correlated with amount of abdominal fat and VF was more strongly associated with fatty liver than SF.

关键词： Steatosis Computed tomography Abdominal fat Visceral fat Subcutaneous fat

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Muscovite nanoparticles mitigate neuropathic pain by modulating the inflammatory response and neuroglial activation in the spinal cord

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Neural Regeneration Research 2020年第11期15卷 2162-2168页

作者： Ju-Young Oh Tae-Yeon Hwang jae-Hwan jang Ji-Yeun Park Yeonhee Ryu HyeJung Lee Hi-Joon Park Acupuncture and Meridian Science Research Center Kyung Hee University26 Kyungheedae-roDongdaemun-guSeoulRepublic of Korea Department of Korean Medical Science Graduate School of Korean MedicineKyung Hee UniversitySeoulRepublic of Korea BK21 PLUS Korean Medicine Science Center College of Korean MedicineKyung Hee UniversitySeoulRepublic of Korea College of Korean Medicine Daejeon UniversityDaejeonRepublic of Korea Korean Institute of Oriental Medicine DaejeonRepublic of Korea

Despite numerous efforts to overcome neuropathic pain,various pharmacological drugs often fail to meet the needs and have many side *** is an aluminosilicate mineral that has been reported to have an anti-inflammatory effect,but the efficacy of muscovite for neuropathic pain has not been ***,we assessed whether muscovite nanoparticles can reduce the symptoms of pain by controlling the inflammatory process observed in neuropathic *** analgesic effects of muscovite nanoparticles were explored using partial sciatic nerve ligation model of neuropathic pain,in which one-third to onehalf of the nerve trifurcation of the sciatic nerve was tightly tied to the dorsal *** nanoparticles(4 mg/100μL)was given intramuscularly to evaluate its effects on neuropathic pain(3 days per week for 4 weeks).The results showed that the muscovite nanoparticle injections significantly alleviated partial sciatic nerve ligation-induced mechanical and cold *** the spinal cord,the muscovite nanoparticle injections exhibited inhibitory effects on astrocyte and microglia activation and reduced the expression of pro-inflammatory cytokines,such as interleukin-1β,tumor necrosis factor-α,interleiukin-6 and monocyte chemoattractant protein-1,which were upregulated in the partial sciatic nerve ligation ***,the muscovite nanoparticle injections resulted in a decrease in activating transcription factor 3,a neuronal injury marker,in the sciatic *** results suggest that the analgesic effects of muscovite nanoparticle on partial sciatic nerve ligation-induced neuropathic pain may result from inhibiting activation of astrocytes and microglia as well as pro-inflammatory *** propose that muscovite nanoparticle is a potential anti-nociceptive candidate for neuropathic *** experimental protocols in this study were approved by the Institutional Animal Ethics Committee(IACUC)at Dongguk University,South Korea(approval No.2017-022-1)

关键词： astrocyte microglia muscovite nanoparticle neuropathic pain partial sciatic nerve ligation pharmacopuncture pro-inflammatory cytokine spinal cord

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Iatrogenic aortic dissection during right transradial intervention in a patient with aberrant right subclavian artery:A case report

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World Journal of Clinical Cases 2022年第27期10卷 9897-9903页

作者： Kyungeun Ha Albert Youngwoo jang Yong Hoon Shin Joonpyo Lee Jeongduk Seo Seok In Lee Woong Chol Kang soon Yong Suh Division of Cardiology Department of Internal MedicineYonsei University College of Medicine50 Yonsei-roSeodaemun-guSeoulSouth Korea Division of Cardiology Department of Internal MedicineGil Medical CenterGachon University College of MedicineIncheonSouth Korea Department of Thoracic and Cardiovascular Surgery Gil Medical CenterGachon University College of MedicineIncheonIncheonSouth Korea

BACKGROUND Aberrant right subclavian artery(ARSA)is the most common congenital anomaly of the aortic *** patients having such anomalies receive transradial intervention(TRI),aortic dissection(AD)may ***,we discuss a case of iatrogenic type B AD occurring during right TRI in an ARSA patient,that was later salvaged by percutaneous *** SUMMARY A 73-year-old man presented to our hospital with intermittent chest *** computed tomography(CT)angiography revealed significant stenosis in the left anterior descending *** coronary angiography was performed via the right radial artery without ***,we were unable to advance the guiding catheter past the ostium of the right subclavian artery to the aortic arch for percutaneous coronary intervention,while the guidewire tended to go down the descending *** patient suddenly complained of chest and back *** CT aortography revealed type B AD propagating to the left renal artery(RA)with preserved renal ***,after 2 d,the patient suddenly complained of right lower limb pain where the femoral pulse was suddenly ***-up CT indicated further progression of dissection to the right external iliac artery(EIA)and left RA with limited *** performed percutaneous angioplasty of the right EIA and left RA without ***-up CT aortography at 8 mo showed optimal *** A caution is required during right TRI in ARSA to avoid *** angioplasty can be a treatment option.

关键词： Aberrant subclavian artery Coronary angiography Aortic dissection Aortography Percutaneous transluminal angioplasty Case report

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单元视域下基于任务驱动模式的电流教学

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物理通报 2024年第5期 61-65页

作者：蒋炜波清华大学附属中学北京100084

电流是初中物理电学推理论证运算的基础,电流的定义、测量,以及串并联电路的电流规律等一直是教与学的重难点,电流单位、电流表原理等则一直是教与学的盲点.在单元教学统领下基于任务驱动模式设计了系列任务,重组了电流教学的内容与实施... 详细信息

电流是初中物理电学推理论证运算的基础,电流的定义、测量,以及串并联电路的电流规律等一直是教与学的重难点,电流单位、电流表原理等则一直是教与学的盲点.在单元教学统领下基于任务驱动模式设计了系列任务,重组了电流教学的内容与实施,探索解决现实教学困境,落实核心素养目标理念.

关键词：电流任务驱动核心素养课程标准单元教学

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Two-Terminal Lithium-Mediated Artificial Synapses with Enhanced Weight Modulation for Feasible Hardware Neural Networks

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Nano-Micro Letters 2023年第5期15卷 236-253页

作者： Ji Hyun Baek Kyung Ju Kwak Seung Ju Kim jaehyun Kim jae Young Kim In Hyuk Im Sunyoung Lee Kisuk Kang Ho Won jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Korea

Recently,artificial synapses involving an electrochemical reaction of Li-ion have been attributed to have remarkable synaptic ***-terminal synaptic transistors utilizing Li-ion intercalation exhibits reliable synaptic characteristics by exploiting the advantage of nondistributed weight updates owing to stable ion ***,the three-terminal configurations with large and complex structures impede the crossbar array implementation required for hardware neuromorphic ***,achieving adequate synaptic performances through effective Li-ion intercalation in vertical two-terminal synaptic devices for array integration remains ***,two-terminal Au/LixCoO_(2)/Pt artificial synapses are proposed with the potential for practical implementation of hardware neural *** Au/LixCoO_(2)/Pt devices demonstrated extraordinary neuromorphic behaviors based on a progressive dearth of Li in LixCoO_(2)*** intercalation and deintercalation of Li-ion inside the films are precisely controlled over the weight control spike,resulting in improved weight control *** types of synaptic plasticity were imitated and assessed in terms of key factors such as nonlinearity,symmetricity,and dynamic ***,the LixCoO_(2)-based neuromorphic system outperformed three-terminal synaptic transistors in simulations of convolutional neural networks and multilayer perceptrons due to the high linearity and low programming *** impressive performances suggest the vertical two-terminal Au/LixCoO_(2)/Pt artificial synapses as promising candidates for hardware neural networks.

关键词： Artificial synapse Neuromorphic Li-based Two-terminal Synaptic plasticity

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绿色施工技术在南沙会址项目中的应用

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葛洲坝集团科技 2024年第1期 21-23,41页

作者：蒋汰宏中国葛洲坝集团建设工程有限公司云南昆明650217

文章以南沙国际金融论坛(IFF)永久会址项目创建省级绿色施工示范工程为例,从施工管理、“四节一环保”评价要素出发,展现绿色施工重点评价指标在项目具体实践应用中的实施情况、技术方法、施工措施及目标控制过程,为同类项目绿色施工实... 详细信息

文章以南沙国际金融论坛(IFF)永久会址项目创建省级绿色施工示范工程为例,从施工管理、“四节一环保”评价要素出发,展现绿色施工重点评价指标在项目具体实践应用中的实施情况、技术方法、施工措施及目标控制过程,为同类项目绿色施工实施提供参考。

关键词：绿色施工四节一环保评价指标

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Adenosine monophosphate enhances callus regeneration competence for de novo plant organogenesis

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Molecular Plant 2023年第12期16卷 1867-1870页

作者： Hong Gil Lee Seo Young jang Eun Yee Jie Seung Hee Choi Ok-Sun Park soon Hyung Bae Hyun-soon Kim Suk Weon Kim Geum-Sook Hwang Pil Joon Seo Department of Chemistry Seoul National UniversitySeoul 08826Korea Plant Genomics and Breeding Institute Seoul National UniversitySeoul 08826Korea Integrated Metabolomics Research Group Western Seoul CenterKorea Basic Science InstituteSeoul 03759Korea Biological Resource Center Korea Research Institute of Bioscience and BiotechnologyJeongeup56212Korea Plant Systems Engineering Research Center Korea Research Institute of Bioscience and BiotechnologyDaejeon 34141Korea College of Pharmacy Chung-Ang UniversitySeoul 06974Korea

Dear Editor,Plant tissue culture involves callus formation and de novo shoot ***,explants from differentiated tissues are used to generate a pluripotent cell mass,called callus,on auxin-rich callus-inducing medium(CIM),followed by shoot regeneration on cytokinin-rich shoot-inducing medium(SiM).Callus results from division of pericycle-like cells(Atta et al.,2009;Sugimoto et al.,2010);its cellular identity resembles that of lateral root primordia(Atta et al.,2009;Sugimoto et al.,2010).Callus acquires cellular pluripotency by forming root stem cell niches on CIM(Sugimoto et al.,2010)。

关键词： Adenosine callus

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