873 research outputs found
sj-pdf-1-imr-10.1177_03000605221122750 - Supplemental material for Evaluation of Motion Segment Size as a New Sensor-based Functional Outcome Measure in Stroke Rehabilitation
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605221122750 for Evaluation of Motion Segment Size as a New Sensor-based Functional Outcome Measure in Stroke Rehabilitation by Hyung Seok Nam, Woo Hyung Lee, Han Gil Seo, Matthew W. Smuck and Sungwan Kim in Journal of International Medical Research</p
sj-docx-1-npx-10.1177_1934578X241238922 - Supplemental material for A Comprehensive Metabolite Profile of Green and White Asparagus (<i>Asparagus officinalis</i> L.) and Their Antioxidant Properties in Differing Cultivation Conditions
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X241238922 for A Comprehensive Metabolite Profile of Green and White Asparagus (Asparagus officinalis L.) and Their Antioxidant Properties in Differing Cultivation Conditions by Tae Jin Kim, Young Jin Park, Tae Gyu Yi, Woo Duck Seo, Nam Il Park and Jae Kwang Kim in Natural Product Communications</p
Control of the shell structure of ZnO-ZnS core-shell structure
No full textNanostructured ZnO-ZnS core-shell powders were synthesized through a solution method using a thioacetamide (TAA) solution in deionized water. ZnO powder and TAA solution were employed to supply zinc and sulfur ions to form the ZnO-ZnS core-shell structures. The structure of the ZnS shell was strongly affected by the mole concentration of the TAA, and the structural properties were characterized by X-ray diffraction and high-resolution transmission electron microscopy. The optical properties of the nanostructured powders were also compared with those of pure ZnO powder. The ultraviolet (UV) emission was greatly enhanced compared to when pure ZnO powder was used in the nanostructured powder synthesized using the 0.5 M TAA solution, while the UV emission of that with the 0.05 M TAA solution was reduced. The green emission of the nanostructured powders was reduced compared to when the pure ZnO powder was used. The mechanism of the structural changes in the core-shell structures is proposed here and its effect on the luminescent properties is discussed
Investigation of the creep deformation mechanism of the lamellar TiAl alloy made by hot extrusion of a blended elemental powder mixture
No full textA gigantically increased ratio of electrical to thermal conductivity and synergistically enhanced thermoelectric properties in interface-controlled TiO2-RGO nanocomposites
No full textWe report synergistically enhanced thermoelectric properties through the independently controlled charge and thermal transport properties in a TiO2-reduced graphene oxide (RGO) nanocomposite. By the consolidation of TiO2-RGO hybrid powder using spark plasma sintering, we prepared an interfacecontrolled TiO2-RGO nanocomposite where its grain boundaries are covered with the RGO network. Both the enhancement in electrical conductivity and the reduction in thermal conductivity were simultaneously achieved thanks to the beneficial effects of the RGO network, and detailed mechanisms are discussed. This led to the gigantic increase in the ratio of electrical to thermal conductivity by six orders of magnitude and also the synergistic enhancement in the thermoelectric figure of merit by two orders. Our results present a strategy for the realization of 'phonon-glass electron-crystals' through interface control using graphene in graphene hybrid thermoelectric materials
© The Royal Society of Chemistry1321sciescopu
Inhibition of elongin C promotes longevity and protein homeostasis via HIF-1 in C.elegans.
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A study on the primary creep deformation mechanism of the lamellar TiAl alloys
No full text학위논문(박사) - 한국과학기술원 : 재료공학과, 1999.2, [ vi, 149 p. ]한국과학기술원 : 재료공학과
Mold Oscillation Feedforward Control Algorithm for Sinusoidal Oscillation of Various Asymmetries
No full textA feedforward control algorithm for the mold oscillators of a continuous casting process is proposed for both sinusoidal and non-sinusoidal oscillations. As steel industries grow, processes allowing for faster continuous casting are required in order to keep up with production demands. To achieve a quicker, continuous casting process, while maintaining slab quality, requires mold oscillations that make use of improved powder consumption rate and reduced friction force. Recently, non-sinusoidal oscillations have been researched owing to their advantages in regards to lubrication and friction. There have been several mechanical approaches but no algorithmic approaches. In this paper, a feedforward control algorithm consisting of embedded input shape and feedforward velocity control algorithms is proposed. Although conventional feedback controls have been commercialized for technical applications, the input shape control algorithm can prevent the non-negligible phase delays or amplitude reduction problems caused by a slow response of systems. In addition, the proposed feedforward velocity control algorithm is derived from the relationship between the valve input and mold velocity, and it allows the mold to correctly follow the non-sinusoidal oscillation. To determine the feasibility of the proposed algorithm, a Matlab Simulink model is derived from the mathematical model. Additionally, 1/100 scale specimen of a typical industry mold oscillator is used. The tests on the specimen showed that the proposed feedforward control algorithm could achieve precise control for both sinusoidal and non-sinusoidal oscillations.110sciescopu
Microcarriers for Smart Release of Kinetic Hydrate Inhibitors Under Hydrate Formation Condition Inside Flowlines
No full textAbstract
Hydrate formation in subsea flowlines is one of the main concerns to safely transport the hydrocarbon fluids in the field of flow assurance. To prevent blockage of hydrate, thermodynamic hydrate inhibitors (THIs) have been injected into the subsea flowlines; however, the high injection amount of THIs may drive up operational expenditure (OPEX) with increasing water depth of oil and gas reservoirs. Kinetic hydrate inhibitors (KHIs) have been investigated as an alternative for few decades. In this study, microcapsules were designed using microfluidics concept for efficient release of KHIs at off-shore transport line of hydrocarbon and gas. Hydrate formation kinetics among four different systems, pure water, microcapsules containing poly vinyl caprolactam (PVCap), microcapsules without PVCap, and PVCap aqueous solution was investigated. The dispersive Raman was applied to understand hydrate formation on microcapsules with temperature change under static condition, and autoclave study also was employed to confirm the shear rate effect on microcapsule stability. From the both experiments, it was confirmed that release of KHI solution from microcapsules delayed the formation of hydrate at the target temperature and showed a similar efficacy comparing to the bulk KHI solution under turbulent condition. These results indicated the release of PVCap solution can be controlled by adjusting the membrane thickness of the microcarriers, which would provide operational flexibility to manage the risk of hydrate plug formation.</jats:p
Engineering Vibrio sp. SP1 for the production of carotenoids directly from brown macroalgae
No full textMacroalgae is regarded as a promising third-generation marine biomass that can be utilized as a sustainable feedstock for bio-industry due to the high sugar level and absence of lignin. Alginate, composed of 1,4-linked D-mannuronate (M) and L-guluronate (G), is one of the major carbohydrates in brown macroalgae. It is difficult to be assimilated by most industrial microorganisms. Therefore, developing engineered microorganisms that can utilize alginate as a feedstock in order to produce natural products from marine biomass is critical. In this study, we isolated, characterized, and sequenced Vibrio sp. SP1 which rapidly grows using alginate as a sole carbon source. We further engineered this strain by introducing genes encoding enzymes under the control of synthetic expression cassettes to produce lycopene and beta-carotene which are attractive phytochemicals owing to the antioxidant property. We confirmed that the engineered Vibrio sp. SP1 could successfully produce 2.13 +/- 0.37 mg L-1 of lycopene, 2.98 +/- 0. 43 mg L-1 of beta-carotene, respectively, from 10 g L-1 of alginate as a sole carbon source. Furthermore, our engineered strain could directly convert 60 g L-1 of brown macroalgae Sargassum fusiforme into 1.23 +/- 0.21 mg L-1 of lycopene without any pretreatment which had been vitally required for the previous productions. As the first demonstrated strain to produce high-value product from Sargassum, Vibrio sp. SP1 is evaluated to be a desirable platform for the brown macroalgae-based biorefinery. (C) 2021 The Author(s). Published by Elsevier B.V. on behalf of Research Network of Computational and Structural Biotechnology.Y
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