Diniz SPSS, RC Oliveira

Phyton-International Journal of Experimental Botany, Vol.78, pp. 155-160, 2009, DOI:10.32604/phyton.2009.78.155

Abstract The effects of fusaric acid, a mycotoxin produced by Fusarium sp, were investigated in relation to its action on corn seedlings. The mycotoxin inhibited the development of corn seedlings at 0.2 mM, causing root length reduction. Anatomically, alterations were only visible from 0.5 mM fusaric acid, directly influencing the cell differentiation process. Precocious differentiation reduces the elongation region. This explains (1) that root shortening is morphologically visible, and (2) the differentiation of a great number of lateral roots nearby the apex, which can be seen in longitudinal cuts. More >

Menéndez-Yuffá¹ A, L Ríos-Bolívar²

Phyton-International Journal of Experimental Botany, Vol.77, pp. 49-64, 2008, DOI:10.32604/phyton.2008.77.049

Abstract Regeneration and multiplication of coffee (Coffea arabica L.) through somatic embryogenesis can be efficiently achieved through different methods. However, it is very important to analyze the progenies obtained by these methods in order to establish their genetic stability. The objectives of this research were (1) to determine the protein electrophoretic patterns in leaves of coffee vitroplants which were regenerated through somatic embryogenesis, and (2) to compare these patterns with those of the explant donor plants. The protein patterns of some coffee genotypes were initially determined to detect possible differences among them. Each analyzed genotype showed a characteristic set of protein… More >

Galatro Andrea, Ivan Rousseau, Susana Puntarulo

Phyton-International Journal of Experimental Botany, Vol.75, pp. 7-20, 2006, DOI:10.32604/phyton.2006.75.007

Abstract Electron Paramagnetic Resonance (EPR) has been developed as a versatile field that uses different techniques sharing the common feature of resonant micro-wave radiation absorption by paramagnetic substances. Certain free radicals, such as ascorbyl radical (A•), show an stable spectrum, and can be directly detected by EPR at room temperature. Studies included in this work clearly show that this highly sensitive methodology can be successfully applied to biological systems. Exposure of plants to UV-B radiation was studied as a factor of oxidative stress in plants, and the effect on A^• steady state concentration was analyzed. A kinetic analysis was performed considering… More >

Gil SP¹, ME Reyna¹, L Seisdedos¹, IP Argüello²

Phyton-International Journal of Experimental Botany, Vol.86, pp. 340-344, 2017, DOI:10.32604/phyton.2017.86.340

Abstract TThe goals of this study were (1) to determinate the cultural practice of Solidago chilensis native Asteraceae from Argentina which have to be used in low maintenance gardening and (2) to describe germination and seedlings of S. chilensis and its morphology type. Germination assay treatments (3 repetitions/50 fruits/year) were intact non-scarified and scarified fruits (achenies), collected in La Mesada, La Calera, Dpto. Colón (Córdoba, Argentina) between 2011-2014. Statistical tests were performed. 50 rhizome cuttings, obtained from mother plants selected in the field, were cultivated in same conditions of the field-substrate with or without rooting solution, and they were cultivated in… More >

José M. Estevez*, Eduardo J. Cáceres**

BIOCELL, Vol.27, No.2, pp. 181-187, 2003, DOI:10.32604/biocell.2003.27.181

Abstract The present study analyzed several characters of the red seaweed Gymnogongrus torulosus, such as cellular structure of the thallus, cuticle, pit plug and cell wall ultrastructure, and morphology of some organelles like plastids, Golgi bodies and mitochondria. Also, anomalous chloroplasts with thylakoid disorganization were found in medullary cells. The significance of this thylakoid disposition is still unclear. This is one of the first studies focused on the fine structure of a red alga recorded in Argentina. More >

Wenchen He^1,*, Shaoyong Guo¹, Yun Liang², Rui Ma³, Xuesong Qiu¹, Lei Shi⁴

CMC-Computers, Materials & Continua, Vol.61, No.3, pp. 1345-1364, 2019, DOI:10.32604/cmc.2019.06669

Abstract With the popularization of terminal devices and services in Internet of things (IoT), it will be a challenge to design a network resource allocation method meeting various QoS requirements and effectively using substrate resources. In this paper, a dynamic network slicing mechanism including virtual network (VN) mapping and VN reconfiguration is proposed to provide network slices for services. Firstly, a service priority model is defined to create queue for resource allocation. Then a slice including Virtual Network Function (VNF) placement and routing with optimal cost is generated by VN mapping. Next, considering temporal variations of service resource requirements, the size… More >

Yatian Shen¹, Yan Li¹, Jun Sun^1,*, Wenke Ding¹, Xianjin Shi¹, Lei Zhang¹, Xiajiong Shen¹, Jing He²

CMC-Computers, Materials & Continua, Vol.61, No.3, pp. 1261-1269, 2019, DOI:10.32604/cmc.2019.06104

Abstract On Twitter, people often use hashtags to mark the subject of a tweet. Tweets have specific themes or content that are easy for people to manage. With the increase in the number of tweets, how to automatically recommend hashtags for tweets has received wide attention. The previous hashtag recommendation methods were to convert the task into a multi-class classification problem. However, these methods can only recommend hashtags that appeared in historical information, and cannot recommend the new ones. In this work, we extend the self-attention mechanism to turn the hashtag recommendation task into a sequence labeling task. To train and… More >

Taiji Adachi^1,*, Yoshitaka Kameo¹

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 88-88, 2019, DOI:10.32604/mcb.2019.07417

Abstract Bone adaptation by remodeling is a process to change its outer shape and internal structure to the changing mechanical environment by osteoclastic bone resorption and osteoblastic bone formation. These cellular activities are regulated by mechanosensory network of osteocytes embedded in bone matrix. An imbalance between bone resorption and formation due to low loadings or disuse results in metabolic bone disorders such as osteoporosis. Many studies have identified various signaling pathways that regulate these cellular activities; however, the physiological and pathological conditions of bone as a system remain difficult to understand because of the complexity of the signaling networks including mechano-biochemical… More >

F. De Angelis¹

Structural Durability & Health Monitoring, Vol.8, No.4, pp. 341-358, 2012, DOI:10.32604/sdhm.2012.008.341

Abstract The influence of different loading rates on the structural response of elasto/viscoplastic materials is illustrated with specific numerical examples. An associated formulation of the evolutive laws in elasto/viscoplasticity is presented within the framework of the generalized standard material model with internal variables. An appropriate solution scheme is applied which is capable to be adopted for different constitutive models. Different loading programs are analyzed by considering different values of the loading rate and of the intrinsic properties of the material. Computational applications and examples are illustrated which describe the rate-dependency of the elasto/viscoplastic material behavior. The significance of the loading program… More >

S. Abdullah¹, S. M. Beden, A. K. Ariffin, N. A. Al-Asady

Structural Durability & Health Monitoring, Vol.5, No.2, pp. 109-132, 2009, DOI:10.3970/sdhm.2009.005.109

Abstract This paper presents a study on fatigue crack growth modelling of thin walled tube aluminium alloy with circumferential crack under constant and variable amplitude loadings. Three fatigue crack growth models were investigated for this purpose, i.e. Walker, Forman and NASGRO. The results showed the differences in the fatigue crack growth simulation under both loading types, although, they have the same stress ratio for the maximum value. Subsequently, it was found that, different models gave different fatigue crack growth behaviour. In another case, many factors were identified towards the fatigue crack growth affection in structures. Hence, an initial crack length and… More >