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| Koyama, Kohei; Yamamoto, Ken; Ushio, Masayuki. |
| Lognormal distributions and self-similarity are characteristics associated with a wide range of biological systems. The sequential breakage model has established a link between lognormal distributions and self-similarity and has been used to explain species abundance distributions. To date, however, there has been no similar evidence in studies of multicellular organismal forms. We tested the hypotheses that the distribution of the lengths of terminal stems of Japanese elm trees (Ulmus davidiana), the end products of a self-similar branching process, approaches a lognormal distribution. We measured the length of the stem segments of three elm branches and obtained the following results: (i) each occurrence of branching caused variations or errors in the... |
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Palavras-chave: Allometry; Fractal; Phenotypic plasticity; Shoot size; Stochastic process; WBE theory. |
| Ano: 2017 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4577 |
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| Silva,J.E.S.; Moura,A.M.A.; Nogueira,R.A.. |
| Verificou-se o efeito de diferentes fontes de ácidos graxos essenciais ômega-3 e ômega-6 sobre o perfil lipídico de codornas japonesas e sobre o crescimento vascular na membrana vitelina dos embriões de aves suplementadas com óleo de peixe, 2% e 4%, e óleo de soja, 2% e 4%, em relação à dieta-controle, sem suplementação lipídica. Foi usado o método enzimático com reação colorimétrica para estimar o perfil lipídico sérico de colesterol total, triglicerídeos e HDL das aves. A vascularização na membrana vitelina foi quantificada por meio da dimensão fractal, utilizando-se o método de box-counting. A concentração de colesterol dos grupos controle e tratados não diferiu entre si. Para o HDL, o grupo que recebeu maior proporção de óleo de peixe, 4%, diferiu dos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Codorna; Ácidos graxos; Codorna japonesa; Fractal; Membrana vitelina; Vascularização. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000600029 |
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| Gil,Julio; Gimeno,Miguel; Laborda,Jesús; Nuviala,Javier. |
| The possibility of characterizing the proximal convoluted tubuli of the dog kidney by means of a unique and objective value, is an attractive idea in order to automate its recognition in anatomy and patology. For this, we obtained a fractal dimension of the proximal convoluted tubuli in the dog kidney by mean box-counting method. The fractal value we obtained is a flat dimension, and it is different than the line fractal dimension of the dog kidney arterial pattern, which was previously calculated by us (Gil et al., 2006). Thus, from optical microscopy images, we are able to obtain a single quantitative measure to discriminate these dog kidney components. This measures can use to automate its recognition. Fractal geometry provides many advantages when... |
| Tipo: Journal article |
Palavras-chave: Fractal; Kidney; Proximal convoluted tubuli. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500005 |
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| BACCHI,O.O.S.; REICHARDT,K.; VILLA NOVA,N.A.. |
| Fractal scaling has been applied to soils, both for void and solid phases, as an approach to characterize the porous arrangement, attempting to relate particle-size distribution to soil water retention and soil water dynamic properties. One important point of such an analysis is the assumption that the void space geometry of soils reflects its solid phase geometry, taking into account that soil pores are lined by the full range of particles, and that their fractal dimension, which expresses their tortuosity, could be evaluated by the fractal scaling of particle-size distribution. Other authors already concluded that although fractal scaling plays an important role in soil water retention and porosity, particle-size distribution alone is not sufficient to... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Fractal; Particle size distribution; Pore size distribution; Soil water retention; Soil hydraulic conductivity. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000200027 |
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| Koike,Tatiana Emy; Camargo,Regina Celi Trindade; Ozaki,Guilherme Akio Tamura; Castoldi,Robson Chacon; Seraphim,Patrícia Monteiro; Oikawa,Sérgio Minoro; Camargo Filho,José Carlos Silva. |
| The aim of this study was to analyze the effects of an association of cryotherapy and therapeutic ultrasound on the treatment of muscle injured by impact. Fifty-five Wistar rats were divided into five groups (n = 11), Acute Injury (AI), Injury (I), Cryotherapy (CR), Therapeutic Ultrasound (TU) and Association of Cryotherapy and Therapeutic Ultrasound (CRTU). The CR and CRTU groups received applications of Cryotherapy three times (immediately, 24 and 48 h after injury) of 20 minutes duration. The TU and CRTU groups received applications of Therapeutic Ultrasound for seven days, for five minutes, in pulsed mode, 0.5 w/cm intensity, frequency 1 MHz. Body mass and gastrocnemius mass were analyzed. In addition to histological slides stained with hematoxylin and... |
| Tipo: Journal article |
Palavras-chave: Fractal; Regeneration; Cryotherapy; Ultrasound Therapy; Collagen. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300042 |
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