Inhibitory Activities of Perilla frutescens Britton Seed Extract against Cell Growth, Migration, and Adhesion in Human Cancer Cells

Sinae Kim,Boram Song,Jihyeung Ju 한국식품영양과학회 2014 한국식품영양과학회 학술대회발표집 Vol.2014 No.10

Effect of Wollastonite Microfibers and Waste Tire Rubber on Mechanical Properties of Concrete

Sina Lotfollahi,Alireza Jaidari,Parham Bakhtiari,Mojtaba Hosseini,Mohammad Ghorbani Heidari 한국콘크리트학회 2023 International Journal of Concrete Structures and M Vol.17 No.5

The main objective of the present research is to investigate the effect of adding wollastonite microfibers and waste tire rubber on the mechanical properties of concrete. For this purpose, two different series of mixtures were considered. Different percentages (5, 10, 15, and 20 percent) of wollastonite microfibers were added to the ordinary concrete and tested in the first series. Then, in the second series, wollastonite microfibers were added to the specimens in the amount of 20% by the weight of cement, and waste tire rubber was replaced with fine aggregate in different percentages (3, 5, 7, and 10 percent by the weight of fine aggregate), and the specimens were tested again. All the specimens were cured at the two ages of 7 and 28 days, and they were tested for the slump, compressive strength, tensile strength, and flexural strength. The results showed that the addition of 20% wollastonite microfibers to the specimens increased the compressive, flexural, and tensile strengths of the concrete at 28 days of age by 16, 87, and 78%, respectively, compared to the control specimen. The outcomes also demonstrated that replacing fine aggregate with tire rubber in samples containing 20% wollastonite microfibers reduces the strength of the samples. The highest reduction is related to the sample containing 20% of waste tire rubber, which has a reduced compressive strength of about 20% compared to the control sample. Furthermore, the results of this research showed that adding wollastonite microfibers to concrete reduces the concrete slump, while the density of the samples increases with the addition of wollastonite. Moreover, the presence of wollastonite microfibers reduces the porosity of concrete, but there is an increase in the number of pores in concrete samples containing waste tire rubber.

Southeast Asianist in the Digital Age

( Sinae Hyun ) 부산외국어대학교 동남아지역원 2018 Suvannabhumi Vol.10 No.2

The paper provides an appreciation and critical commentary on Stephen Keck’s fictional product, the SEABOT. It examines the problems of regional definition, given Southeast Asia’s diversity, and provides a positive gloss on this diversity. It also considers certain conceptual and methodological issues raised by SEABOT, and the advantages and disadvantages of this online platform.

A Novel AE Based Algorithm for PD Localization in Power Transformers

Sina Mehdizadeh,Mohammadreza Yazdchi,Mehdi Niroomand 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.6

In this paper, a novel algorithm for PD localization in power transformers based on wavelet de-noising technique and energy criterion is proposed. Partial discharge is one of the main failures in power transformers. The localization of which could be very useful for maintenance systems. Acoustic signals due to a PD event are transient, irregular and non-repetitive. So wavelet transform is an efficient tool for this signal processing problem that gives a time-frequency demonstration. First, different wavelet based de-noising methods are analyzed. Then, a reasonable structure for threshold value determining and applying manner on signals is presented. Evaluated errors are good evidences for choices. Next, applying the elimination low energy frequency bands is discussed and developed as a de-noising method. Time differences between signals are used for PD localization. Different ways in time arrival detection are introduced and a novel approach in energy criterion method is presented. At the end, the quality of algorithm is verified through the different assays in lab.

Involvement of inflammation in Alzheimen`s disease pathogenesis and therapeutie potential of anti-inflammatory agents

( Sina Shadfar ),( Chul Ju Hwang ),( Mi Sun Lim ),( Dong Young Choi ),( Jin Tae Hong ) 영남대학교 약품개발연구소 2016 영남대학교 약품개발연구소 연구업적집 Vol.26 No.-

Alzheimer``s disease (AD) is the most common form of dementia. It is characterized by beta-amyloid (A~) peptide fibrils, which are extracellular depositions of a specific protein, and is accompanied by extensive neu-roinflammation. Various studies have demonstrated risk factors that can affect AD pathogenesis, and they include accumulation of Aβ, hyperphosphorylation of tau protein, and neuroinflammation. Among these detrimental factors, neuroinflammation has been highlighted by epidemiologic studies suggesting that use of anti-inflammatory drugs could significantly reduce the incidence of AD. Evidence suggests that astrocytes, microglia, and infiltrating immune cells from periphery might contribute to or modify the process of neuroinflammation and neurodegeneration in AD brains. In addition, recent data indicate that micro-RNAs may affect neuroinflammatory responses in the brain. This article focuses on supportive evidence that neuroinflammation plays a critical role in AD development. In addition, we depict putative therapeutic capacity of anti-inflammatory drugs for AD prevention or treatment. We also discuss pathogenic mechanisms by which astrocytes, microglia, T cells and microRNA participate in AD and the neuroprotective mechanisms of anti-inflammatory drugs.

Effect of oxide coating on artificial aggregates made of reject ash to prevent sticking phenomenon

Sinae Jo 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.2

Homogeneously bloated aggregates formed by sintering at rising temperatures require higher temperature than aggregate bloated by the black core mechanism. Much liquid can be produced on the aggregate surfaces and induce sticking between the aggregates. In this study, highly refractory oxides, Al2O3 and SiO2, were coated onto the aggregate surfaces in order to control sticking. The degree of sticking was analyzed by identifying the phases formed and measuring the neck length (2x) of two aggregates (radius = r) stuck together. As the amount of coating increases, the (x/r) ratio decreases, indicating that the degree of sticking was reduced. For the Al2O3 coating, a smaller particle size of the coating powder leads to a greater aggregate surface area that can be coated, which prevents sticking between the aggregates. For the SiO2 coating, increasing the particle size of the coating powder decreased the (x/r) ratio in the 1 ~ 2 wt% coating, while the ratio increased for coating above 3 wt% due to the lower melting temperature of amorphous silica and the generation of β-cristobalite. The proper amounts and suitable particle size of the Al2O3 and SiO2 coating materials were obtained for manufacturing homogeneously bloated aggregates using 100% reject ash. These results could be used as basic data for the development of a mass-production process using a rotary kiln.

Experimental and numerical investigation of composite conical shells’ stability subjected to dynamic loading

Sina Jalili,Jamal Zamani,M. Shariyat,N. Jalili,M.A.B. Ajdari,M. Jafari 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.5

In this article, stability of composite conical shells subjected to dynamic external pressure is investigated by numerical and experimental methods. In experimental tests, cross-ply glass woven fabrics were selected for manufacturing of specimens. Hand-layup method was employed for fabricating the glassepoxy composite shells. A test-setup that includes pressure vessel and data acquisition system was designed. Also, numerical analyses are performed. In these analyses, effect of actual geometrical imperfections of experimental specimens on the numerical results is investigated. For introducing the imperfections to the numerical models, linear eigen-value buckling analyses were employed. The buckling modes are multiplied by very small numbers that are derived from measurement of actual specimens. Finally, results are compared together while a good agreement between results of imperfect numerical analyses and experimental tests is observed.

Evaluating phylogenetic relationships in the Lilium family using the ITS marker

Sina Ghanbari,Barat Ali Fakheri,Mohammad Reza Naghavi,Nafiseh Mahdinezhad 한국식물생명공학회 2018 JOURNAL OF PLANT BIOTECHNOLOGY Vol.45 No.3

Lilium is a perennial bulbous plant belonging to the liriotypes genus. Our aim was to study the phylogenetic relationships of the Lilium family. Two varieties of Lilium ledebourii, 44 varieties of the gene bank, and one variety from the Tulipa family served as the out group. In order to study the diversity between lilium masses, ITS regions were used to design the marker. The results showed that the guanine base is the most abundant nucleotide. Relatively high conservation was observed in the ITS regions of the populations (0.653). Phylogenetic analysis showed that sargentiae and hybrid varieties are older than other varieties of the Lilium family. Also, the location of L. ledebourii varieties (Damash and Namin) was identified in a phylogenetic tree by using the ITS marker. Overall, our research showed that ITS molecular markers are very suitable for phylogenetic studies in the Lilium family.

Sublayer assisted by hydrophilic and hydrophobic ZnO nanoparticles toward engineered osmosis process

Sina Mansouri,Soodabeh Khalili,Majid Peyravi,Mohsen Jahanshahi,Rezvaneh Ramezani Darabi,Fatemeh Ardeshiri,Ali Shokuhi Rad 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.11

Hydrophilic and hydrophobic polyethersulfone (PES)-zinc oxide (ZnO) sublayers were prepared by loading of ZnO nanoparticles into PES matrix. Both porosity and hydrophilicity of the hydrophilic sublayer were increased upon addition of hydrophilic ZnO, while these were decreased for the hydrophobic sublayer. In addition, the results demonstrated that the hydrophilic membrane exhibited smaller structural parameter (S value or S parameter or S), which is beneficial for improving pure water permeability and decreasing mass transfer resistance. In contrast, a higher S parameter was obtained for the hydrophobic membrane. With a 2M NaCl as DS and DI water as FS, the pure water flux of hydrophilic TFN0.5 membrane was increased from 21.02L/m2 h to 30.06L/m2 h and decreased for hydrophobic TFN0.5 membrane to 14.98L/m2 h, while the salt flux of hydrophilic membrane increased from 10.12g/m2 h to 17.31g/m2 h and decreased for hydrophobic TFN0.5 membrane to 3.12g/m2 h. The increment in pure water permeability can be ascribed to reduction in S parameter, which resulted in reduced internal concentration polarization (ICP). The current study provides a feasible and low cost procedure to decrease the ICP in FO processes.

Evaluating the ability of separation and adsorption of SO2 by nano-CuO-Fe2O3/TiO2 in high concentrations and moderate temperatures

Sina Esfandiarpour,Mohammad Reza Ehsani,Parisa Nazemi Ashani,Mohammad Hossein Enayati 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.11

Nano CuO-Fe2O3/TiO2 adsorbents were made with different compositions of metal oxides using precipitation- desorption method. The adsorbents were applied for adsorption of SO2 at high concentrations ranging from 10,000 to 30,000 ppm and temperatures between 523 and 627 K. Adsorption experiments were applied for adsorbents in a laboratory fixed bed adsorption column. The adsorption capacity was measured by calculating the area under the adsorption curve using the integral method. The results showed that temperature is the most affecting factor on the adsorption capacity. The highest adsorption capacity was obtained by using 17, 8 and 75 wt% of CuO, Fe2O3 and nano TiO2, respectively. Characteristics of the best sorbent were determined by using Fe-SEM, XRD and nitrogen adsorption- desorption analyses.