Laura Ribba, Jonathan Cimadoro, Silvia Goyanes^*

Journal of Renewable Materials, Vol.7, No.4, pp. 355-363, 2019, DOI:10.32604/jrm.2019.04083

Abstract In this work, conductive polymer nanocomposites were developed based on a biodegradable and biobased polymer (poly (lactic acid)), with the incorporation of only 0.3 wt% of carbon nanotubes (CNTs) to be used as volatile solvent sensors. The correct dispersion of the nanofiller was achieved thanks to a CNT non-covalent modification with an azo-dye (disperse orange 3) which allowed to reach the percolation for electric conduction in values as low as 0.3 wt%. The chemo-resistive properties of the developed sensors were investigated by exposure to organic vapors (ethanol, tetrahydrofuran and toluene) and water vapor, showing good selectivity. In addition, considering the… More >

Yi TANG^1,*, Carlos Alberto BUSSO²

BIOCELL, Vol.42, No.2, pp. 61-66, 2018, DOI:10.32604/biocell.2018.07015

Abstract Elm (Ulmus pumila L.) is the dominant tree species in the sparse elm woodland, the original vegetation in the Horqin Sandy Land. The effects of changes in precipitation on U. pumila trees have not been fully studied. We determined a dynamic model by considering the five stages in the U. pumila life cycle, i.e. seed, seedling, and juvenile, mature and over-mature tree stages. The effects of changes in precipitation on population density and age structure were then evaluated. Population density, after averaging all study developmental morphology stages, ranged from 16.67 individuals/m2 to 25.01 individuals/m2 under a mean annual precipitation (MAP)… More >

A. C. Michel-Aceves¹, J. F. Díaz-Nájera¹, R. Ariza-Flores², M. A. Otero-Sánchez¹, R. Escobar-Martínez¹ and C. H. Avendaño-Arrazate^3,*

Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 325-333, 2019, DOI:10.32604/phyton.2019.06777

Abstract In two tomato genotypes, we assessed control alternatives for damping-off with combinations of chemical fungicides and native/commercial strains of biological agents. Forty treatments consisting of 19 levels of mixing products, chemical fungicides, native strains and commercial products from biological control agents, and untreated treatment were used onto Ramsés and Toro hybrids. They were distributed on an incomplete block design in divided plots arrangement, where genotypes constitute the larger ones and the 8-repetition mixed products, the smaller ones. Putting 180 mL of fungal complexes, made of spores and mycellium Fusarium-solani (2 × 106 UFC), Rhizoctonia-solani (1 × 106 UFC), Phytophthora-capsici (1… More >

Xiaoqin Zhang, Tao Tong, Bin Tian, Yunxia Fang, Jiangjie Pan, Junjun Zheng and Dawei Xue*

Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 253-260, 2019, DOI:10.32604/phyton.2019.06143

Abstract Barley (Hordeum vulgare L.) is one of the most Aluminum (Al) sensitive cereal species. In this study, the physiological, biochemical, and molecular response of barley seedlings to Al treatment was examined to gain insight into Al response and tolerance mechanisms. The results showed that superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activity were inhibited to different degrees following Al exposure. The MDA content also significantly increased with increasing Al concentrations. SRAP results indicated significant differences between Al treatments and controls in terms of SRAP profile, and the genomic template stability (GTS) decreased with increasing Al concentration and duration. These… More >

Xiachen Lv^1,#, Yunxia Fang^1,#, Lantian Zhang¹, Weiyi Zhang¹, Ling Xu¹, Jingjin Han¹, Bailing Jin², Xian Zhang¹, Xiaoqin Zhang^1,*, Dawei Xue^1,*

Phyton-International Journal of Experimental Botany, Vol.88, No.2, pp. 91-100, 2019, DOI:10.32604/phyton.2019.06622

Abstract Melatonin (MLT) is a hormonal substance found in many organisms and can improve plant stress resistance. In this study, the japonica rice variety Y32 and indica rice variety NJ6 were cultivated in hydroponics under different concentrations of CdCl₂ at the two-leaf stage. The growth, physiological and biochemical responses of the seedlings and the expression of cadmium (Cd)-related genes under exogenous melatonin (MLT) treatment were assessed. The results indicated that Cd stress destroyed the dynamic balance between reactive oxygen species (ROS) production and removal, resulting in ROS accumulation, membrane lipid peroxidation, and impaired growth and development. Following the application of exogenous… More >

Francesco Genna¹, Corrado Paganelli², Stefano Salgarello³, Pierluigi Sapelli²

CMES-Computer Modeling in Engineering & Sciences, Vol.4, No.3&4, pp. 405-420, 2003, DOI:10.3970/cmes.2003.004.405

Abstract We study the mechanical behavior of a prototype osseointegrated dental implant containing a thin internal layer, designed in such a way as to simulate the existence of the periodontal ligament (PDL). Experimental stress-strain curves suggest that the behavior of the PDL can be simulated by means of a compressible hyperelastic constitutive model, at least for short-term loading. We have adopted one such a model to describe the mechanical behavior of the internal layer in the prototype implant design, studied by means of several 3--D Finite Element analyses. The results indicate that the presence of such a nonlinear internal layer is… More >

Ji Wang, Yangyang Chen, Guijia Chen, Jianke Du

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 89-90, 2011, DOI:10.3970/icces.2011.017.089

Abstract The finite element analysis of quartz crystal resonators is increasingly important due to the precise design requirements in frequency and electrical properties with the consideration of crystal blank, processing, mounting, and packaging. To reduce the computational cost, one proven approach is to use the Mindlin plate theory for the thickness-shear vibrations of crystal plates with electrodes and other complications. This approach has been implemented in parallel finite element method with the sophisticated software components for the solutions of linear systems in terms such as eigenvalues, mode shapes, and amplitudes, which in turn can be used for the evaluation of certain… More >

Ping Hu, Yang Xia, Limin Tang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.017.075

Abstract In this paper, a modified paradigm of quasi conforming finite element method with truncated polynomial expansions of in-domain displacements and derived expansions of strains is introduced. The purpose is to improve the drawbacks of the traditional one that neglecting the connections between the components of strain and lack of principle in the process of choosing polynomial expansions. Based on the modified framework a four-node quadrilateral flat shell element with complete quadratic polynomials for membrane and bending displacement fields is developed. Numerical tests are carried out for validation of the present element. The results show that the present element preserves all… More >

J. Sladek, V. Sladek¹, P. Solek, P.H. Wen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.4, pp. 165-170, 2008, DOI:10.3970/icces.2008.008.165

Abstract A meshless local Petrov-Galerkin (MLPG) method is applied to solve thermal bending problems described by the Reissner-Mindlin theory. Functionally graded material properties with continuous variation in the plate thickness direction are considered too. A weak formulation for the set of governing equations in the Reissner-Mindlin theory is transformed into local integral equations on local subdomains in the mean surface of the plate with using a unit test function. The meshless approximation based on the Moving Least-Squares (MLS) method is employed for the implementation. More >

Yifan Xia, Jie Wang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.020.087

Abstract Phase field simulation is an effective way to predict the domain evolution in ferroelectric materials. A phase field model is developed to investigate the domain structures and polarization switching in in ferroelectric thin films with deadlayers. Simulation results show that the deadlayers as well as misfit strain have a significant influence on the domain structures and polarization switching in the ferroelectric thin films. It is found that the simulated switching electric field in ferroelectric thin films decreases with the thickness of the deadlayers increasing. More >