• Title/Summary/Keyword: SRM university

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Investigation of Water-Soluble Vitamin (B1, B2, and B3) Contents in Rice, Noodles, and Sauces (밥, 면, 소스류에 존재하는 수용성 비타민 B1, B2 그리고 B3 함량 검토)

  • Cho, Jin-Ju;Hong, Seong Jun;Boo, Chang Guk;Shin, Eui-Cheol
    • Journal of Food Hygiene and Safety
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    • v.35 no.4
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    • pp.398-410
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    • 2020
  • In this study, the contents of soluble vitamins B1 (thiamin), B2 (riboflavin), and B3 (niacin) in 13 kinds of rice, 11 kinds of noodles, and 15 kinds of sauces were identified. The limit of detection (LOD) and limit of quantification (LOQ) were checked to determine the reliability of the experimental results, and the accuracy of the results through the standard reference material (SRM 1849a) was verified to show excellent indicators. As for thiamin, japchaebab (stir-fried glass noodles with rice) was found to contain the highest content among rice dishes, makguksu (buckwheat noodles) among noodle dishes, and tomato spaghetti sauce among sauces. Riboflavin was identified as having the highest content in slightly spicy jajangbab (black-bean sauce with rice), bibimguksu (spicy noodles) for noodles, and spicy curry with turmeric for sauces. Niacin was highest in content in the deep and rich flavors of spicy chicken-fried rice, janchiguksu (banquet noodles), and black-bean sauce, respectively. As a result of checking the amount of recommended daily intake of water-soluble vitamins for Korean adult men and women, the highest content of riboflavin was 217.40% for men and 271.75% for women. Through this study, we are going to establish a database of nutrients for the water-soluble vitamins contained in rice, noodles, and sauces to provide the necessary dietary data concerning the content of the water-soluble vitamins contained in foods for daily recommended intake.

Extracellular RNAs and Extracellular Vesicles: Inception, Current Explorations, and Future Applications

  • Perumal, Ayyappasamy Sudalaiyadum;Chelliah, Ramachandran;Datta, Saptashwa;Krishna, Jayachandran;Samuel, Melvin S.;Ethiraj, Selvarajan;Park, Chae Rin
    • Journal of Food Hygiene and Safety
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    • v.35 no.6
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    • pp.535-543
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    • 2020
  • In addition to the ubiquitous roles of cellular RNA in genetic regulations, gene expression and phenotypic variations in response to environmental cues and chemotactic signals, the regulatory roles of a new type of RNA called extracellular RNAs (exRNAs) are an up-and-coming area of research interest. exRNA is transported outside the cell through membrane blebs known as membrane vesicles or extracellular vesicles (EVs). EV formation is predominant and conserved among all microbial forms, including prokaryotes, eukaryotes, and archaea. This review will focus on the three major topics concerning bacterially derived exRNAs, i.e., 1) the discovery of exRNA and influence of extraneous RNA over bacterial gene regulations, 2) the known secretion mechanism for the release of exRNA, and 3) the possible applications that can be devised with these exRNA secreted by different gram-negative and gram-positive bacteria. Further, this review will also provide an opinion on exRNA- and EV-derived applications such as the species-specific exRNA markers for diagnostics and the possible roles of exRNA in probiotics and the epigenetic regulations of the gut microbiome.

Analysis and a Compensation Method for Torque Ripple caused by Position Error in Switched Reluctance Motor Position Sensorless Control (스위치드 릴럭턴스 전동기의 위치 센서리스 제어시 위치오차에 의해 발생하는 토크리플 해석과 그 보상 방법)

  • Oh, Ju-Hwan;Kwon, Byung-Il
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.806-807
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    • 2011
  • This paper presents a new sensorless controller used with both the classical sliding mode observer(SMO) and the rate of current change in order to a reduced torque ripple for switched reluctance motor (SRM) sensorless drives. The new sensorless scheme consists of a sliding mode observer (SMO)-based position sensorless approach for high speeds along with a low-resolution discrete the rate of current change for low speeds and standstill. The new position estimation resets between the SMO and the low-resolution of current change according to the speed sign and the position error difference between the SMO and the low-resolution rate of current change. The simulation results show the robustness of this new high performance sensorless control approach with the hybrid sensorless control topology.

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A Study on 3D Equivalent Magnetic Circuit Network Method Using Trapezoidal Element (사다리꼴 요소를 이용한 3차원 등가자기회로망 해석에 관한 연구)

  • Kim, Sol;Lee, Ju
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.51 no.8
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    • pp.449-456
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    • 2002
  • 3D Equivalent magnetic Circuit Network Method (EMCNM) is comparatively the easy way that analyzes 3D models of Electric Machine by using permeance as a distributive magnetic circuit parameter under the existing magnetic equivalent circuit method and Numerical Method. The existing 3D EMCNM could not correctly describe the shape of an analysis target when using rectangular shape element or fan shape element, so it made errors when calculating permeance. Therefore, this paper proposes the trapezoidal element contained rectangular element, fan-shape element, and quadrilateral element to express a shape. The proposed method in this research was confirmed as a useful and an accurate method through comparing with the analysis result of SRM model that is sufficiently guaranteed by 2D-Analysis.

3D Structure Prediction of Human 5-Hydroxytryptamine Receptor 7 (5-HT7R)

  • Madhavan, Thirumurthy
    • Journal of Integrative Natural Science
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    • v.11 no.2
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    • pp.87-92
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    • 2018
  • 5-Hydroxytryptamine receptor 7 ($5-HT_7R$) is one of G-Protein coupled receptors, which is found to be involved in the pathophysiology of various neurological disorders including depression, sleep disorders, memory deficiency and neuropathic pain. After activation of $5-HT_7R$ by serotonin, it activates the production of the intracellular signaling molecule cyclic AMP. The availability of 3D structure of the receptor would enhance the development of new drugs. Hence, in the present study, homology modelling of human 5-hydroxytryptamine receptor 7 ($5-HT_7R$) was performed using comparative modelling (Easy Modeller) and threading (I-TASSER) approaches. The generated models were validated using Ramachandran plot and ERRAT plot and the best models were selected based on the validation results. The 3D model developed here could be useful for identifying crucial residues and further docking study.

Electrochemical Oxidation of Hydrazine in Membraneless Fuel Cells

  • Durga, S.;Ponmani, K.;Kiruthika, S.;Muthukumaran, B.
    • Journal of Electrochemical Science and Technology
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    • v.5 no.3
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    • pp.73-81
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    • 2014
  • This paper describes the continuous flow operation of membraneless sodium perborate fuel cell using acid/alkaline bipolar electrolyte. Here, hydrazine is used as a fuel and sodium perborate is used as an oxidant under Alkaline-acid media configuration. Sodium perborate affords hydrogen peroxide in aqueous medium. In our operation, the laminar flow based microfluidic membranleless fuel cell achieved a maximum power density of $27.2mW\;cm^{-2}$ when using alkaline hydrazine as the anolyte and acidic perborate as the catholyte at room temperature with a fuel mixture flow rate of $0.3mL\;min^{-1}$. The simple planar structured membraneless sodium perborate fuel cell enables high design flexibility and easy integration of the microscale fuel cell into actual microfluidic systems and portable power applications.

Manufacturing Driver and Measuring Performance of Disk type Single Phase Switched Reluctance Motor (DSPSRM) (디스크형 단상 SRM의 구동드라이브 제작과 성능 측정)

  • Lee, Jong-Han;O, Yeong-Ung;Lee, Eun-Ung;Lee, Min-Myeong
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.1
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    • pp.15-19
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    • 2000
  • The main advantages of DSPSRM lie in the simple robust construction, low manufacturing cost and simple driving circuit. Especially, it is possible to make shortly the axial length of DSPSRM. therefore, it is suitable to setup this motor in a narrow space. For practical use, prototype of DSPSRM was already manufactured. In this paper, we explain driving method and design driving circuit of DSPSRM. And then speed, torque and efficiency are measured. As a result of measurement, the torque was constant at normal speed and the speed was linearly increased as the current increase. Therefore, we verify that DSPSRM is suitable for low-speed fan load.

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Characteristic Analysis and Design of a Single Phase Switched Reluctance Motor for High Speed Application

  • Kim, Youn-Hyun
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.4B no.3
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    • pp.114-121
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    • 2004
  • Switched reluctance motors have received much attention as a driving means for various industrial applications because they have simple construction, low cost and high efficiency. Nevertheless, the requirements of drive converters make it difficult to lower the overall system cost as compared with the DC motor application. Single phase switched reluctance motors (SPSRMs) provide a solution to the high cost problem since the number of switching power devices can be reduced and consequently the trials for application are increased. However, research involving SPSRMs, especially in the area of design work, is insufficient. This paper introduces a novel design methodology of single phase SRM. The design work for SPSRM comprises the determination of many variables such as stator and rotor pole arc as well as on, off and so on. Managing all variable combinations leads to lengthy computation time and a fault in the design process. For that reason, a reliable technique and brief procedure term are required in SPSRM design.

Strategic Utilization of Soft Magnetic Composite in a High-Speed Switched Reluctance Machine Depending on a Loss Pattern (손실 패턴에 따른 고속 스위치드 릴럭턴스 전동기의 SMC 분말을 이용한 효율 개선)

  • Lee, Cheewoo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.2
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    • pp.323-327
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    • 2017
  • Soft magnetic composite (SMC) material has recently received a significant attention in the area of high-speed machines because of its unique properties such as good design flexibility and low eddy current loss. However, SMC's electromagnetic property is poor compared to silicon steel in terms of saturation, relative permeability, and hysteresis loss. This paper presents a technique for utilization of SMC in two strategic designs of a switched reluctance machine (SRM) depending on a loss pattern. To investigate the effect of SMC's merits and demerits, the stator material is changed from laminated steel to SMC.

Energy absorption of fibrous self compacting reinforced concrete system

  • Senthil, K.;Satyanarayanan, K.S.;Rupali, S.
    • Advances in concrete construction
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    • v.4 no.1
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    • pp.37-47
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    • 2016
  • The objective of the present work is to evaluate the influence of two different methods of improving the ductility of Reinforced Concrete Frames and their influence on the full range behavior of the frames with M40 grade of concrete. For this purpose one fourth scale reinforced concrete square frames are experimentally tested subjected to static cyclic loading for three cases and monotonic loading for one case. The parameters are varied as method introducing ductility to the frame viz. (i) by using conventional concrete (ii) adding 1% of steel fibres by volume of concrete at hinging zones (iii) using self-compacting concrete with fibres at hinging zones. The energy absorption by ductile and non-ductile frames has been compared. The behavior of frames tested under cyclic loading have revealed that there is a positive trend in improvement of ductility of frames when fibrous concrete is used along with self-compacting concrete.