bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of DNA methylation and its correlation with mRNA expression of epidermal growth factor receptor encoding for cytoskeleton regulating protein in peritoneal endometriosis tissue
Authors: Zahrah A , Muharam R , Marwali M L S , Sururi A , Harzif A K , Pratama G , Ocktariyana  , Asmarinah  
Published: March 2020

Abstract
It has been known that the EGFR have the role for regulation the cytoskeleton activity and its expression increased in endometriosis tissue. The aim of this study was to evaluate the DNA methylation of the EGFR gene that might cause the alteration of its mRNA expression in peritoneal endometriosis tissue. Samples were peritoneal endometriosis tissue from 20 endometriosis patients and 20 female of non-endometriosis patients. The DNA methylation of the EGFR gene was analyzed by the method of Methylation Specific PCR and ImageJ software, while its expression of mRNA were analyzed by the method of qRT-PCR. The DNA methylation in the EGFR gene in peritoneal endometriosis tissues increased compared to normal endometrial tissues (peritoneal endometriosis tissue = 56%, normal endometriosis tissue = 19%). The expression of mRNA EGFR gene in endometriosis peritoneal tissues was 1.341 fold increased relative to normal endometrium. There is no significant correlation between the DNA methylation with expression of mRNA EGFR (p = 0.947 and r = -0.016). Increasing of EGFR mRNA expression in endometriosis tissue that was not caused by alteration of its DNA methylation, have to play a role in the pathogenesis of endometriosis.
Callus response of hybrid and Madura local corn to salt stress
Authors: Sukma K P W , Daryono B S , Purnomo  , Suprapti I 
Published: March 2020

Abstract
Salinity (salty and acidity) is one of important abiotic stresses, which can decrease corn production. In Indonesia, corn is one of important cereal crop beside rice. Madura is an island that known as widest area of maize landfill in East Java but has lowest productivity. Madura local corns (var. Manding, Duko and Elos) and hybrid corn (var. Sukmaraga) known as salt tolerance. This research objectives was to compare response of those callus to salt stress. Callus responses to salt stress, can indicate to their resistance to salinity. The young corn stalks were induced to be callus by MS+2,4D 4mg/L, then cultivated to media MS+NaCl (0, 100, 200 mM) for 30 days. The parameters were morphology (colour and texture), survived and proline content. Proline content was measured by nynhidrin methods. The results showed that salt stress change callus colour (from white to creamy white and brown) and texture (from friable to compact and intermediate). Duko and Elos survived more than 90%, but Manding and Sukmaraga survived less than 15%. Salt treatment increased proline content of all callus. Madura local corn had better tolerance to salt stress than hybrid.
Phylogenetic relationships among Indonesian wood borer pests, xyleutes, and its allied genera (Lepidoptera: Cossidae)
Authors: Fitriana Y S , Darmawan  , Wiyati S Y , Sutrisno H 
Published: March 2020

Abstract

Xyleutes and its allied genera are two of the major wood borer pests in South East Asia, especially in Indonesia. The systematics of this group is still vague since all these genera were mostly described based on superficial external characters only. Therefore, the validity of each genus within this group needs to be assessed based on more comprehensive data. To assess the monophyly of each genus, and to elucidate the relationship of the Indonesian Xyleutes and its allied genera, we analyzed 28 species from 11 genera based on nucleotide sequence variation across a 579-bp region in the CO I gene. The results showed that ML tree- building methods recovered almost all sections recognized based on morphological characters. Some genera such as Morpheis, Chalcidica, and Rapdalus are valid genera and their relationship within each genus well resolved. On the other hand, genera Trimoslemos, Zeuzera, and Xyleutes seem to be paraphyletic groups. Those genera, indeed, need revision based on materials not only from Indonesia but also from other countries. The current phylogeny proposed here is necessary to be evaluated by involving conserved genes to get better resolution for the relation among all genera.
Temperature Effect on Dielectric and AC Breakdown Properties of the Cellulose Insulation Paper Immersed in Mineral-Palm Oil Mixture
Authors: Zhu Mengzhao , Zhu Wenbing , Chen Xin 
Published: March 2020

Abstract
Mixed oil is considered as an ideal insulating fluid for its great physicochemical and insulation properties. A novel mixed oil consisted of 75 vol.% mineral oil and 25 vol.% palm oil, was developed by our team and its main properties basically come up the standards of IEC 60296:2012. In this study, the dielectric properties of mineral oil-impregnated paper (MIN-IP) and mixed oil-impregnated paper (MIX-IP), were comparative analyzed at 25 °C-65 °C, including relative permittivity and dielectric loss factor. The temperature effect on AC breakdown properties for MIN-IP and MIX-IP were also researched at 25 °C-75 °C. The result shows that MIX-IP have higher relative permittivity and dielectric loss factor than MIN-IP. The difference on dielectric strength between MIN-IP and MIX-IP is more significant at 45 °C to 65 °C.
Effect of SLM Process Parameters on Relative Density of Maraging Steel (18Ni-300) Formed Parts
Authors: Huang Weidong , Zhang Weijie , Chen Xiayu 
Published: March 2020

Abstract
Taking maraging steel (18Ni300) powder as the research object, the influence of the density of forming parts such as laser power p, scanning speed v, scanning spacing s and powder thickness h during the rapid forming process of SLM laser was studied by orthogonal test. The experimental results show that the laser power and scanning spacing have a significant effect on the density of the molded part, while the powder thickness and scanning speed have no significant effect on the relative density of the molded part. The order of importance of the influence of each factor on the compactness of the formed part is the laser power, the scanning spacing, the scanning speed, and the powder thickness. The best combination of process parameters is a laser power of 260 W, a scanning speed of 700 mm/s, a scanning spacing of 0.11 mm, and a powder thickness of 0.02 mm. When the laser volume energy density is between 70 J/mm3 and 185 J/mm3, the relative density can reach more than 99%, and it can increase to 99.99% during this interval.
Predicting Mechanical Properties and Corrosion Resistance of Heat-Treated 7N01 Aluminum Alloy by Machine Learning Methods
Authors: Cao Xinyu , Zhang Yingbo , Chen Hui 
Published: March 2020

AbstractIn this paper, mechanical properties and corrosion resistance of different heat-treated 7N01 aluminum alloys are measured. A novel approach is proposed to establish the relationship between heat-treated processing parameters and the properties using machine learning methods. With a set of trustable data, generalized regression neural network (GRNN), support vector machine (SVM) and multiple linear regression (MLR) are applied in the prediction of mechanical properties, while GRNN and SVM, two prevalent machine learning methods, are also employed to predict the corrosion resistance. By comparing coefficient of determination (R2) and mean absolute percentage error (MAPE), we demonstrate, GRNN and SVM are indeed useful machine leaning methods for both modeling and predicting. In virtue of the new approach, we can also establish other goal-oriented models for design and prediction as long as the training data set is available. Finally, it’s found that both single-stage aging and retrogression re-aging can make the alloy reach higher strength values than double-stage aging, however the corrosion resistance of double-stage aging alloy is better than that of single-stage aging.
Fabrication of Crosslinked Waterborne Polyurethane with Low-Gloss and Micro Roughness for Matting Application
Authors: Yong Qiwen , Yang Yuzi , Wei Daidong 
Published: March 2020

Abstract
A groups of cross-linked waterborne polyurethane (CPU) coatings were successfully synthesized and characterized. The CPU emulsions could achieve low gloss effect without addition of any matting agents by the formation of self-roughed surface. Rheological research shows that the emulsions comply with the Herschel-bulkley pseudoplastic fluid model with a yield stress, and exhibited the same behaviors as the gel. SEM and AFM illustrated the rough surface morphology of the films, and a series of roughness parameters were calculated. In general, the resulted CPU emulsions can provide moderate roughness levels, good hardness and adhesive strengths after film-forming, which were very appropriate for use as matt coating.
Using DSC Studying the Relationship between Water Absorbency of Superabsorbent Polymer and Its Structure
Authors: Jiang Zuming 
Published: March 2020

Abstract
A series of superabsorbent ter-polymers (SAPs) with acrylic acid, acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, crosslinked by polyethyleneglycol diacrylate-600 were prepared. The SAPs were characterized by Fourier transform infrared spectra (FTIR) and the water absorbency was measured by the Tea-bag method. Differential scanning calorimetry (DSC) was used to determine the bound water content of the different samples with various water contents. It was found that the more hydrophilic groups the ter-polymer has, the larger the bound water content is, the stronger the ability of interacting with water is, and the larger the water absorbency the ter-polymer has.
Preparation and Comparison Anticorrosive Properties of Graphene Anticorrosive Coatings
Authors: Chen Qiang , Zhao Yue-Ju , Teng Ji-Lin , Xia Yi-Qin , Yu Bao-Qin , Zheng Yongli 
Published: March 2020

Abstract
Since graphene was successfully stripped from graphite in 2004, its excellent properties and unique two-dimensional layered structure have attracted great interest in the field of coatings. Graphene can be used as a filler in anticorrosive coatings. Its good electrical conductivity and sheet-like barrier properties which can isolate oxygen and corrosive media. So, graphene powders can improve the corrosion resistance of the coating. With the development of the industrialization of graphene, which made the production cost of graphene is gradually reduced, it made graphene can be used in coatings be possible. This article introduces a method for preparing graphene heavy-duty anticorrosive coating, the anticorrosive principle of graphene heavy anticorrosive coating was described. The salt spray resistance of graphene heavy anticorrosive coatings and international brand heavy anticorrosive coatings were compared.
Out-of-Pile Performances of Zr-Sn-Nb-Fe Alloys for PWR Fuel Cladding
Authors: Zhuo H , Yang Z B , Cheng Z Q , Yang Y F , Zhao W J 
Published: March 2020

Abstract
The safety and reliability of Pressure Water Reactors (PWRs) is closely related to the performances of zirconium (Zr) alloy as fuel rod cladding material. Zr-Sn-Nb-Fe series alloys are one of the important directions for continuous improvement of zirconium alloys for high burn-up fuel element claddings. Two new zirconium alloys, N1(Zr-0.5Sn-0.15Nb-0.5Fe-0.25V) and N2(Zr-0.2Sn-1.3Nb-0.1Fe-0.05V) have been developed to use as advanced PWR fuel rod cladding materials through the studies of the corrosion behavior of Zr-Sn-Nb-Fe Alloys, the composition optimization, the preparation of claddings and the out-of-pile performances and in-pile tests of new zirconium alloys. The results are obtained by out-of-pile performance tests of two Zr alloy claddings. Transmission Electron Microscopy (TEM) results shown that fine and uniform distribution of β-Nb and/or ZrFeV(Nb) particles could lead to excellent out-of-pile corrosion resistance. Autoclave testing in 360 °C/18.6 MPa pure water, 60 °C/18.6 MPa/70 ppm Li+ aqueous solution and 360 °C/18.6 MPa/1000 ppm B3+/3.5 ppm Li+ aqueous solution indicated that both of N1 and N2 alloys possessed better corrosion resistance than Zr-4 alloy. The hydrogen uptake results of two kinds of alloys from corrosion reactions under various corrosion conditions showed hydrogen uptake increased with the exposure time or oxide thickness, and hydrogen uptake rate of the new alloys after long-term corrosion are lower than Zr-4. Moreover, the new alloys have demonstrated superior or similar out-of-pile tensile, burst and creep properties relative to Zr-4.
Effect of Doping Radio on Thermoelectric Properties of Na1-xAgxCO2O4
Authors: Luo Xiaodong , Wang Hong , Zhang Liping , Li Xinliang , Luo Qiang , Yi Junlin 
Published: March 2020

Abstract
Oxide thermoelectric materials have the characteristics of simple conversion device structure and no environmental pollution. In this paper, a series of Na1-xAgxCO2O4 thermoelectric materials with different doping radios were prepared by sol-gel synthesis method and microwave sintering method. Through the analysis of XRD, Seebeck coefficient, thermal conductivity and conductivity, the best effect is the doping ratio 0.3. To certain extent, the ZT value of the material is increased, and the relationship between nano scale and thermoelectric performance is obtained, which provides a new method for the preparation of thermoelectric materials.
Determining the Activation Energy of Solid-State Phase Transformation of 1035 Steel from Isoconversional Analysis of DSC Data
Authors: Tan G L , Tang D , Mu T , Li Z , Xu J X , Wang X M 
Published: March 2020

Abstract
The results of solid-state phase transformation kinetics analysis for the steel have been controverted because of the complexity and diversity. In this paper, the activation energy, which represents the energy barrier for austenite to pearlite solid-state phase transformation of 1035 steel, was determined from the nonlinear isoconversional method. The result shown that the activation energy is change with the degree of transformation. Therefore, the nonlinear isoconversional approach maybe a better way to calculate the activation energy of solid-state phase transformation.
Effects of Thickness and Pre-stretching Ratio on Quenching Residual Stress in 7050 Aluminum Alloy Thick Plate
Authors: Cao H L , Wang J Q , Liu C , Niu G M 
Published: March 2020

AbstractThe quenching residual stress in 7050 aluminum alloy thick plate was simulated by using the finite element method (FEM). And the FEM model was verified the experimental results. Then the effects of thickness and pre-stretching ratio on quenching residual stress were studied using the FEM model. The simulation results showed that the quenching residual stress increases gradually with the increase of thickness. The residual stress increased rapidly with the increase of thickness when the thickness between 40mm and 80mm. While the residual stress increased slowly when the thickness exceeds 80mm. The quenching residual stress decreased gradually with the increase of pre-stretching, but the decreasing extent slowed down gradually. When the pre-stretching amount exceeded 2.5%, the reduction ratio can be achieved more than 95.0%. Considering the efficiency of the reduction of quenching residual stress as well as the economy, the pre-stretching ratio should be set between 2.5% and 3.5%.
Effect of In-Situ Reinforced Particle on the Failure of TiC/AZ91 Composites
Authors: Shao Letian , Yao Junping 
Published: March 2020

Abstract
By using image processing, recognition technology and edge extraction technology, the true particle morphology and distribution of TiC / AZ91 composites were obtained, and finite element numerical calculation models of different particle shapes were established. with the help of ansys finite element software, the stress distribution and maximum strain values of TiC/AZ91 composite under different enhanced particle shapes are studied to explore the influence law and mechanism of the material on the failure behavior of the material. The results show that, compared with round particles, square particles are prone to plastic damage and lead to the destruction of magnesium-based composites.
Reaction Mechanism Analysis of Phosphorus Slag - Fly Ash - Phosphorus Gypsum - Cement Foamed Concrete
Authors: Liu Qiumei , Li Caiyu 
Published: March 2020

Abstract
In this study, phosphorous slag powder, fly ash and cement were used as composite cementing materials, and phosphogypsum was used as the activator of phosphorous slag powder and fly ash to stimulate their activity. The hydration reaction of cement, phosphorus slag powder, fly ash and phosphogypsum was studied. The results show that the hydration products of cement, cement + phosphorous slag powder, cement + phosphorous slag powder + fly ash, and cement + phosphorous slag powder + fly ash + phosphorous gypsum have the same mineral composition but different relative content. The hydration samples of cement, cement + phosphorous slag powder, cement + phosphorous slag powder + fly ash, and cement + phosphorous slag powder + fly ash + phosphogypsum have certain differences in microstructure and quantity, especially ettringite. Cement hydration can stimulate the activity of phosphorus slag powder and fly ash, in turn, the addition of phosphorus slag powder, fly ash and phosphogypsum can promote the hydration process of cement, improve the quality of hydration products, and improve the density of concrete structure.
Fabrication of Green Concrete by Using Recycled Construction Waste
Authors: Zhao Jian , Gao Peiwei , Yang Zhengxun 
Published: March 2020

Abstract
To fabricate a new green building material without higher CO2 emission and much energy consumption, recycled construction waste was used as a raw material. Metakaolin was introduced as a cementitious binder instead of traditional Portland cement. NaOH and water glass mixture solution played a role of alkaline activator, then the activity of metakaolin would be released to show an excellent performance. The content of metakaolin was varied to obtain an optimal mechanical property and cost ratio. The specimens were fabricated in room, then cured in air after demoulding, robustness properties were measured which consist of compressive strength and bending strength, and their microstructures were investigated finally.
Study on Mechanical and Crack Resistance of Expanded Fiber Reinforced Concrete
Authors: Tian Minghao , Gao Peiwei , Wang Limin , Tian Yilang 
Published: March 2020

Abstract
In order to effectively improve the mechanical properties, deformation properties and crack resistance of concrete, and to control the cracking of concrete, high crack resistance concrete with excellent comprehensive performance is prepared. The basalt fiber and calcium magnesium expansion agent are mixed into the concrete to increase the tensile strength and limit the shrinkage deformation. Starting from the fundamental factors of concrete cracking, control the cracking of concrete and improve its crack resistance. The effects of different basalt fiber (BF) and calcium magnesium expansion agent (EA) and different w/c on the mechanical and crack resistance of concrete were investigated. Three-factor and three-level orthogonal tests were carried out to research the compressive, tensile, flexural, free deformation tests of expanded fiber concrete, at the same time, the best mix ratio was determined. Finally, the SEM test was carried out to analyze the mechanism of crack resistance improvement from the microstructure. The results show that when the fiber content is 1% and the expansion agent is 7%, the concrete has the best crack resistance and the performance improvement effect.
Study on Welding Process of 7×0.5 Multilayer 304 Bellows and Flange
Authors: Jiang Zhaodong , Liang Dong , Zhou Tong , Tong Linlin 
Published: March 2020

Abstract
In order to ensure the welding quality of 7 layers of 0.5-thk 304L bellows and flange, the welding process was studied, and the evolution rules of weld zone forming, mechanical properties and microstructure under four different process conditions are analyzed to determine the best welding process. The results show that the four kinds of welding conditions can obtain the welded joint with good appearance, but the macro fracture analysis shows that for the welding of 7x0.5 bellows, 2mm double-layer welding is the best welding method. At this time, the distance between the outer wall of the bellows and the inner wall of the flange is the smallest, and the penetration is the largest; For the combination welding method of seam welding and fusion welding, the hardness of the seam welding area is the highest, followed by that of the fusion welding area, because the seam welding area is mainly small equiaxed distance, while the fusion welding is mainly coarse columnar crystal.
Study on the Shrinkage Behavior of the Cement Mortar with the Additives of the Nano-Kaolinite Clay
Authors: Fan Y F , Li Q C , Zhang S Y , Luan H Y 
Published: March 2020

Abstract
The effect of nano-kaolinite clay (NKC) on the early age cracking behavior of cement mortar was investigated. The restrained ring-test method was used to detect shrinkage crack tendency of cement mortar specimen. The cracking and strain on the surface of mortar ring for the ordinary and NKC mortar were monitored. The development of crack width and strain during the drying process were obtained. Finite element analysis is carried out to simulate the evolution of the crack in restrained concrete rings subject to circumferential drying. The results demonstrate that the addition of NKC increases the shrinkage cracking tendency of mortar at early age. It is found that the crack width is significantly increased in the mortar specimen added with 3% NKC replacement.
First Principle Calculation of Electronic Structure and Stabilities of TiC/Mg Composites Interfaces
Authors: Xiao Jiangbo , Yao Junping 
Published: March 2020

Abstract
The Millken charge of atom, charge density difference and electronic structures of TiC(111)/Mg(0001) with different stacking sequences were studied by the basis of the first-principles calculation method, and the Interfacial wettability and bond strength were evaluated by interfacial adhesion work. The results show that the C-CS(center site)-Mg interface, the CTS(top site)-Mg interface and Ti-CS-Mg interface is almost no change and the Ti-TS-Mg interface changes into a new Ti-CS-Mg interface after geometry optimization. Compared with the original Ti-CS-Mg interface, the new Ti-CS-Mg interface has a similar ideal work of adhesion and interfacial distance. And the C-CS-Mg interface is the most stable owing to it has the greatest ideal work of adhesion (7.221 J/m2) and the smallest interfacial distance (1.39 Å). The C-CS-Mg and C-TS-Mg interfaces have both covalent bonds and ionic bonds. However, the Ti-CS-Mg interface only has metallic bond.
Reliability Analysis of Clamp Welding Defects Based on Finite Element Simulation
Authors: You Yi , He Cheng , Wang Xinxin , Zhang Ling , Wang Yanzhe , Hu Yibo , Wei Yanding 
Published: March 2020

Abstract
Cracking and failure of clamp is a common problem in the maintenance of power grid, which seriously threatens the safety of power grid electrical transmission. Therefore, based on the finite element analysis method, the static strength check and reliability analysis are firstly carried out to evaluate the structural safety of the defect-free clamp. Secondly, SINTAP was used to evaluate clamps with planar defects, and Paris formula was used to predict the fatigue crack growth life. The results show that the clamp with planar welding defects can also meet the requirements under severe working conditions due to its good plastic reserve and toughness. The crack depth a of the welding defect significantly affects the safety of the clamp structure, and the crack feature a/c also has a certain impact on the safety. However, when the crack depth a is less than a certain value, no fatigue fracture will occur.