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Inhibition of β-amyloid1-40 Peptide Aggregation and Neurotoxicity by Citrate
YongHoonPark, Young-JinKim, IlHongSon, HyunDukYang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.4 2 273-279 (7 pages)
apoptosis. Apoptotic body formation was observed under a fluorescent micro- scope after Hoechst 33342 staining. Hoechst labeling shows (A) control (untreated cells), (B) increased nuclear condensation and fragmentation in 20 μM Aβ 1-40 treated cells and (C) decreased nuclear condensation and fragmentation in cells treated with 20 μM Aβ1-40 plus 1.0 mM citrate preincubated for 6 days. The... The accumulation of Ղ-amyloid (AՂ) aggregates is a characteristic of Alzheimer's disease (AD). Furthermore, these aggregates have neurotoxic effects on cells, and thus, molecules that inhibit AՂ aggregate formation could be valuable therapeutics for AD. It is well known that aggregation of AՂ depends on its hydrophobicity, and thus, in order to increase the hydrophilicity of AՂ, we considered using citrate, an anionic surfactant with three carboxylic acid groups. We... -
Biogenic Volatile Compounds for Plant Disease Diagnosis and Health Improvement
Rouhallah Sharifi, Choong-Min Ryu 한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2018, 34권 6호 1 459-469 (11 pages)
a condensation reaction. In the next step, silanol and siloxane molecules bind to each other in the presence of an acid or base, and form a chain. Eventually, these chains form a matrix with small micropores (Buckley and Greenblatt, 1994). Sol-gel is a qualified formulation for controlled release of volatiles. The cross-linking in the sol-gel process can be managed to produce a formulation... Plants and microorganisms (microbes) use information from chemicals such as volatile compounds to understand their environments. Proficiency in sensing and responding to these infochemicals increases an organism’s ecological competence and ability to survive in competitive environments, particularly with regard to plant-pathogen interactions. Plants and microbes acquired the ability to sense and respond to biogenic volatiles during their evolutionary history. However, these signals can only be... -
Semantic Key Pre-Distribution Protocol For Multi-Phase Wireless Sensor Networks
Carlos Ramos, Zita Maria Almeida do Vale 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 12 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2011, 제 1권 제 1호 3 17-28 (12 pages)
condensation framework in which the structural-based and motion-based models are combined to refine the feature extraction. Chai et al. divided the human body into three parts; then the variances of these parts are combined as the crucial gait features. Although the structure-based models can, to ..PAGE:4 SemanticKey Pre-DistributionProtocolForMulti-PhaseWirelessSensorNetworks Copyright ⓒ 2011... Gait is a new biometric aimed to recognize a subject by the manner in which they walk. Gait has several advantages over other biometrics, most notably that it is a non-invasive and perceivable at a distance when other biometrics are obscured. We present a new area based metric, called gait masks, which provides statistical data intimately related to the gait of the subject. Early results are promising with a recognition rate of 90% on a small database of human subjects. In addition to this, we... -
Investigation of carbon dioxide adsorption by nitrogen-doped carbons synthesized from cubic MCM-48 mesoporous silica
Young-Jung Heo, Minh-Uyen T. Le, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 10 62-66 (5 pages)
an infection in the desorption curve, character- istic of capillary condensation within pores 34 nm in diameter, as shown in Table 1 and Fig. 3. The results of these nitrogen adsorp- tion/desorption experiments are consistent with the data from the transmission electron microscopy analysis. The pore diameter should be equal to the wall thickness of MCM-48 if the carbon synthesis simply followed... -
Adsorption of volatile organic compounds using activated carbon fiber filter in the automobiles
Hyung Suk Moon, In Soo Kim, Sin Jae Kang, Seung Kon Ryu 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 8 203-209 (7 pages)
resulting in large meso- pore volume, which contributed to extended the break point time for the adsorption of toluene. The adsorption of toluene appeared to be affected largely by the capillarity condensation phenomenon by mesopores in addition to the micropore flling. In fact, there is slight hysteresis on the adsorption isotherm of KF-1500, provid- ing evidence of the existence of mesopore... The adsorption of volatile organic compounds (VOCs) was carried out using an activated carbon fiber (ACF) filter in an automobile. The adsorption capacities of formaldehyde, toluene, and benzene on an ACF filter were far better than those of a polypropylene (PP) mat filter and combined (PP+activated carbon) mat filter by batch adsorption in a gas bag. In a continuous flow of air containing toluene vapor through an ACF packed bed, the breakpoint time was very long, the length of the unused bed... -
Superhydrophobic carbon-based materials: a review of synthesis, structure, and applications
Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 16 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 5 89-104 (16 pages)
capillary condensation decreased the superhydrophobicity of the surface and diminished its corrosion inhibition effcacy. 4. Superhydrophobicity on CNTs CNTs, especially those with a cylindrical nanostructure, are of immense research interest for their outstanding behavior in practical applications such as nanotechnology, electronics, optics and other felds of materials science and technology... Materials with appropriate surface roughness and low surface energy can form superhydrophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers, carbon nanotubes, graphene, amorphous carbons, etc. Recent advances in emerging fields such as... -
Study on the Simplified Numerical Spot Welding Simulation by using the Flexibility Influence Coefficient Method
Kim. Seungwook, Lee. Wook Jin, Kim. Kiil, Cho. Seong Wook 한국정밀공학회 International journal of precision engineering and manufacturing 8 Pages
한국정밀공학회 International journal of precision engineering and manufacturing 2013, Vol.14 No.11 1961-1968 (8 pages)
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주자유도 선정 기법에 의한 동하중의 등가 정하중으로의 변환
김현기, 조맹효, Kim. Hyun-Gi, Cho. Maeng-Hyo 한국전산구조공학회 한국전산구조공학회논문집 7 Pages
한국전산구조공학회 한국전산구조공학회논문집 2007, Vol.20 No.1 57-63 (7 pages)
본 연구는 동하중의 영향을 받는 구조물의 효율적인 구조 해석 및 최적화 수행을 위해 임계 시간의 동하중을 등가 정하중으로 변환하는 방법을 제안한다. 동하중을 등가 정하중으로 변환하기 위해서는 적절한 자유도 선정이 중요하다. 그러나, 기존 방법에서는 자유도의 선정이 임의로 이루어져서 몇 개의 자유도에 과도한 정하중이 부과되거나, 구조물의 거동에 영향력이 없는 자유도들이 선정됨으로써 신뢰성이 떨어지는 결과를 제공하기도 한다. 본 연구에서는 2단계 축소기법과의 연동을 통해 중요 자유도를 선정하고, 선정된... -
강성등가하중의 정의와 응용
김치경, Kim. Chee-Kyeong 한국전산구조공학회 한국전산구조공학회논문집 10 Pages
한국전산구조공학회 한국전산구조공학회논문집 2006, Vol.19 No.3 303-312 (10 pages)
본 연구에서는 요소의 추가 및 제거 또는 부분적인 강성 변경이 있을 때, 이러한 강성 변경이 전체 구조물의 거동에 미치는 영향을 하중으로 표현한 강성등가하중을 제안한다. 강성등가하중에 의한 재해석은 초기 구조물을 대상으로 하므로 이미 계산된 강성행렬 및 역행렬을 다시 사용할 수 있어 재해석 효율을 크게 향상시킬 수 있다. 본 논문에서는 강성등가하중의 개념을 정의하고 간단한 병렬 스프링 구조물을 이용하여 강성등가하중 산정 가능성에 대하여 우선 기술한다. 다음으로 일반적인 골조 구조물에서 강성 변경에 대한... -
부분적 강성 변화에 따른 효율적 부분 재해석 알고리즘
김치경, Kim. Chee-Kyeong 한국전산구조공학회 한국전산구조공학회논문집 9 Pages
한국전산구조공학회 한국전산구조공학회논문집 2004, Vol.17 No.4 459-467 (9 pages)
본 연구에서는 부분적 강성 변경이 연속적으로 필요한 경우, 전체 구조물을 재해석하지 않고도 관심을 두고 있는 변위와 부재력을 실시간 응답 수준에서 재계산할 수 있는 "적응형 부구조물화를 이용한 부분 재해석 알고리즘"을 제안한다. PRAS 알고리즘의 핵심 개념은, 1) 대상 구조물을 강성변경부분과 강성고정부분으로 구분하고, 2) 강성고정부분을 강성변경부재들이 연결된 잔류자유도만을 갖는 부구조물로 응축한 후, 3) 강성변경부재들과 강성고정부분 부구조물의 결합으로 전체 구조물을 모델랑함으로써, 최종...