Urrutia J¹, R Rivera^1,2, E Hauenstein¹, P De los Ríos¹

Phyton-International Journal of Experimental Botany, Vol.81, pp. 7-13, 2012, DOI:10.32604/phyton.2012.81.007

Abstract Macrophytes of inland waters are a group of great biological interest. Although lentic systems are ideal for their growth, their presence is not so evident in oligotrophic water bodies, proliferating largely in areas with some level of contamination. A useful tool to determine the presence of a regulatory factor in the composition of these and other biological communities is the use of null models. This analysis was applied based on the co-occurrence of species through a matrix of presence and absence, with the purpose of determining the presence of randomness in species associations. The three models tested, determined the presence… More >

García-Pereyra J¹, CGS Valdés-Lozano², G Alejandre-Iturbide³, I Villanueva Fierro³, OG Alvarado Gómez⁴

Phyton-International Journal of Experimental Botany, Vol.80, pp. 167-173, 2011, DOI:10.32604/phyton.2011.80.167

Abstract Five genotypes of amaranth were evaluated: four of Amaranthus hypochondriacus L. (collect 153-5-3, 653, 655 and Criollo Tlaxcala) and one of A. cruentus L. genotype 33. Studies were conducted in the cycle of spring-summer (PV) 2000 in Marín, N. L., and PV 2001 and PV 2002 in El Valle del Guadiana, Dgo. A completely randomized design with two repetitions was used, with factorial arrangement using split-plots, divided in space and time. The study population densities (DP) were 125000; 62500; 41666; 32500 and 18666 plants/ha. They analyzed (1) the stability of the genotypes exposed to different environments following Eberhart & Russell… More >

Zhang JT¹, B Xu¹, M Li²

Phyton-International Journal of Experimental Botany, Vol.80, pp. 161-166, 2011, DOI:10.32604/phyton.2011.80.161

Abstract The content of active compounds in Glycyrrhiza uralensis may vary among populations in different regions, and be influenced by environmental variables. We determined the effects of soil and climate on contents of glycyrrhizic acid and liquiritin in various populations of Glycyrrhiza uralensis. Fifty individuals from 5 rangeland populations in arid and semi-arid regions of North China were collected and analyzed. The contents of glycyrrhizic acid and liquiritin were determined using the HPLC method. Contents of glycyrrhizic acid and liquiritin varied significantly among populations as follows: Chifeng > Hangjinqi > Minqin > Aletai > Kashi. These contents were significantly correlated with… More >

Özbay H

Phyton-International Journal of Experimental Botany, Vol.80, pp. 85-92, 2011, DOI:10.32604/phyton.2011.80.085

Abstract The phytoplankton of the Kars River was studied from May to October 2005 at five sampling stations. Sixty-six phytoplankton taxa were determined, consisting of Cyanophyta (9), Chlorophyta (25), Euglenophyta (18), Bacillariophyta (7), Cryptophyta (3), Dinophyta (1) and Chrysophyta (3). Total phytoplankton density increased from May to July and then decreased until October. The dominant phytoplankton group was Cyanophyta (36.5 - 64.4%) for most of the study period, followed by Bacillariophyta (20.4 – 38.7%) and Chlorophyta (20.9 – 28.9%). Temperature, pH and dissolved oxygen ranged from 9.6 °C to 21.6 °C; 7.6 to 8.0, and 5.9 to 7.4 mg/L, respectively. Chlorophyl… More >

Kandus¹ M, D Almorza³, R Boggio Ronceros², JC Salerno¹

Phyton-International Journal of Experimental Botany, Vol.79, pp. 39-46, 2010, DOI:10.32604/phyton.2010.79.039

Abstract Our objective was to determine the genotype-environment interaction (GxE) in a hybrid integrated by maize lines either carrying or not balanced lethal systems. Experiments were conducted in three locations over a period of two years considering each yearlocation combination as a different environment. Yield data were analysed using the Additive Main Effects and Multiplicative Interaction (AMMI) model and the Sites Regression Analysis (SREG). Results were represented by biplots. The AMMI analysis was the best model for determining the interaction. More >

Torres¹ YA, MA Long², SM Zalba¹

Phyton-International Journal of Experimental Botany, Vol.77, pp. 225-240, 2008, DOI:10.32604/phyton.2008.77.225

Abstract The objective of this work is to contribute to the biology of Pavonia cymbalaria A. St. Hil & Naudin (Malvaceae), a native species of the Southern mountains of Buenos Aires Province. This knowledge will contribute to (1) promote its use as an ornamental species, (2) its conservation and (3) stimulate the interest and public valuation of mountain systems biodiversity. Seven populations of P. cymbalaria were selected. Two of them were growing under Pinus halepensis forests to characterize different environments were the herbaceous species is growing in the wild. Environmental characteristics immediately associated to six individuals of the species were studied… More >

González FM, DR Pérez

Phyton-International Journal of Experimental Botany, Vol.86, pp. 332-339, 2017, DOI:10.32604/phyton.2017.86.332

Abstract The Argentine arid Patagonia, in general, and ‘La Payunia’ ecosystem in particular, are important areas for conservation due to the high number of endemic species. However, this region presents a high level of degradation as a result of human activities. Thus, ecological rehabilitation strategies need to be implemented to recover certain areas. The main objectives of this study were to (1) evaluate the reintroduction of two selected native species in severely degraded areas, and (2) determine if the survival and growth of an endemic shrub species, Senna arnottiana, increase when it is associated with a perennial grass, Pappostipa speciosa. These… More >

Guangyu Zhu¹, Yuan Wei¹, Qi Yuan^1,*, Ge Yan², Jian Yang²

Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 55-56, 2019, DOI:10.32604/mcb.2019.05730

Abstract This article has no abstract. More >

Muyi Guo¹, Yan Cai¹, Zhiyong Li^1,2,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 49-49, 2019, DOI:10.32604/mcb.2019.05727

Abstract Observational studies have identified angiogenesis from the adventitial vasa vasorum and intraplaque hemorrhage (IPH) as critical factors in atherosclerotic plaque progression and destabilization. Here we propose a mathematical model incorporating intraplaque neovascularization and hemodynamic calculation for the quantitative evaluation of atherosclerotic plaque hemorrhage. An angiogenic microvasculature based on histology of a patient’s carotid plaque is generated by two-dimensional nine-point model of endothelial cell migration. Three key cells (endothelial cells, smooth muscle cells and macrophages) and three key chemicals (vascular endothelial growth factors, extracellular matrix and matrix metalloproteinase) are involved in the intraplaque angiogenesis model, and described by the reaction-diffusion partial… More >

Ramana M. Pidaparti¹, Alex C. Johnson¹

Structural Durability & Health Monitoring, Vol.9, No.1, pp. 87-98, 2013, DOI:10.32604/sdhm.2013.009.087

Abstract Surface damage in the form of pitting was observed in NiAl Bronze metal subjected to corrosion and cyclic stresses. In order to investigate the stresses surrounding the evolving pits due to corrosion, an image based computational study was carried out. The computational study involves developing an analysis model from the SEM images of corroded pits and then conducting stress analysis. Several computational simulations were carried out with increasing/evolving pits and the corresponding stress environment was obtained. The results obtained indicate that pit profiles (size and height) greatly affect the stress environment and the maximum stresses may vary depending on the… More >