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| Registros recuperados: 9.178 | |
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| FOLGUERA,GUILLERMO; BOZINOVIC,FRANCISCO. |
| A los 150 años de la publicación de "El origen de las especies" de Charles Darwin, numerosos homenajes se han realizado en diferentes ciudades del mundo. Sin embargo, es importante preguntarse hacia el seno de la comunidad científica acerca del alcance efectivo del darwinisimo dentro de la biología. En este trabajo analizamos este supuesto intentando responder, al menos de una manera aproximativa, la pregunta: ¿es darwinista la biología en la actualidad? A estos fines, consideramos algunos de los principales aportes que suelen asignarse al darwinismo en las ciencias de los sistemas vivos: el análisis y centro en la diversidad, un origen único de los sistemas vivos, la incorporación del azar y el reconocimiento de las causas proximales. En términos... |
| Tipo: Journal article |
Palavras-chave: Causas próximas; Darwinismo; Diversidad biológica. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000400003 |
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| Marçal-Pessoa,Ana Flávia; Bassi-Branco,Carmen Lucia; Salvatierra,Cristiana dos Santos Barbosa; Stoppiglia,Luiz Fabrizio; Ignacio-Souza,Letícia Martins; Reis,Sílvia Regina de Lima; Veloso,Roberto Vilela; Reis,Marise Auxiliadora de Barros; Carneiro,Everardo Magalhães; Boschero,Antonio Carlos; Arantes,Vanessa Cristina; Latorraca,Márcia Queiroz. |
| ^len |
| Tipo: Journal article |
Palavras-chave: Connexin 36 Connexin 43 β -catenin Low protein diet Pregnancy Pancreatic islets Rat. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100003 |
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| RIVAS,MARIELLA; SEEGER,MICHAEL; HOLMES,DAVID S; JEDLICKI,EUGENIA. |
| The genome of the acidophilic, proteobacterium Acidithiobacillus ferrooxidans, contains linked but divergently oriented genes, termed afeI and afeR, whose predicted protein products are significantly similar to the LuxI and LuxR families of proteins. A possible promoter and Lux box are predicted upstream of afeI. A cloned copy of afeI, expressed in E. coli, encodes an enzyme that catalyzes the production of a diffusible compound identified by gas chromatography and mass spectrometry as an unsubstituted N-acyl homoserine lactone (AHL) of chain length C14. This AHL can be detected by a reporter strain of Sinorhizobium meliloti Rm41 suggesting that it is biologically active. The reporter strain also responds to extracts of the supernatant of A. ferrooxidans... |
| Tipo: Journal article |
Palavras-chave: A. ferrooxidans; Quorum-sensing; LuxI and LuxR; Lux box; Homoserine lactone. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200018 |
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| Kozlu,Tolunay; Bozkurt,Yesim Akaydin; Ates,Sevinc. |
| The present study was aimed at the macroanatomical and histological investigation and the demonstration of the structural characteristics of the uropygial gland in the white stork. The uropygial gland of two adult male white storks constituted the material of the study. It was determined that the gland was situated subcutaneously in between the caudal aspect of the lumbosacral bone and the first coccygeal vertebrae. The gland was composed of two lobes, which displayed an oval appearance when viewed from above and resembled a water drop when observed medially. Tuft of feathers were present on the caudal margin of each lobe. The present study revealed that the uropygial gland of the white stork is a simple tubular gland, which discharges its secretion into... |
| Tipo: Journal article |
Palavras-chave: White stork; Uropygial gland; Anatomy; Histology. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300010 |
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| LE PROVOST,GREGOIRE; HERRERA,RAÚL; PAIVA,JORGE AP; CHAUMEIL,PHILIPPE; SALIN,FRANCK; PLOMION,CHRISTOPHE. |
| A large quantity of high quality RNA is often required in the analysis of gene expression. However, RNA extraction from samples taken from woody plants is generally complex, and represents the main limitation to study gene expression, particularly in refractory species like conifers. Standard RNA extraction protocols are available but they are highly time consuming, and not adapted to large scale extraction. Here we present a high-throughput RNA extraction protocol. This protocol was adapted to a micro-scale by modifying the classical cetyltrimethylammonium (CTAB) protocol developed for pine: (i) quantity of material used (100-200 mg of sample), (ii) disruption of samples in microtube using a mechanical tissue disrupter, and (iii) the use of SSTE buffer.... |
| Tipo: Journal article |
Palavras-chave: RNA extraction; Micromethod; Forest trees. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400003 |
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| Ilayperuma,Isurani; Nanayakkara,Ganananda; Palahepitiya,Nadeeka. |
| Prediction of stature from incomplete and decomposing skeletal remains is vital in establishing the identity of an unknown individual. It has been stated that a variety of factors such as race, gender and nutrition play an important role in determining the height of an individual. Estimation of stature from measurements of various long bones has been achieved with varying degree of accuracy. Those studies resulted in establishing different formulae for the estimation of stature for the respective populations. However, evidence shows that there is a great void in such norms for Sri Lankans. Hence, this study was designed to investigate the relationship and to propose a gender and age specific linear regression models between the ulna length and height of an... |
| Tipo: Journal article |
Palavras-chave: Height; Ulna; Sri Lankan; Regression equation. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400015 |
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| Diez-de-Medina,Sergio; Silva,Herman. |
| In Peach (Prunus persica) several physiological changes, such as woolliness, triggered by chilling injury are involved in major production losses due to cold storage of the fruits during shipping. Additionally, the low level of polymorphisms among peach varieties is an important limitation in the search for new molecular markers that could be associated with economically important traits. Therefore, a functional approach was employed to associate candidate genes with an informative marker in peach. The data was obtained from the results of an in silico analysis of four different cold peach treatments. Thirty two candidate genes were selected that were aligned against Arabidopsis thaliana genomic sequences to design intron-flanking EST-PCR markers. These... |
| Tipo: Journal article |
Palavras-chave: Bin mapping; Molecular markers; Prunus; Rosaceae. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500007 |
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| Oliveira Junior,E. M. de; Moreira,R. T; Neto,B. L; Silva,C. M. F. da; Lima,F. J. C. |
| The objective of this work was to study the morphology and biometry of the infraorbital foramen (FIO), variations in its shape, size and number as well as to obtain measurements of its location. 60 dry skulls were analyzed. The test of Qui-quadrant and the T Test were used in measurements with a 5% significance. On the right side, the FIO was measured at a distance of 6.49(±1.68) mm from the lower, 39.65(±3) mm from the upper, 17.7(±2.97) mm from the medial and 20.46(±2.9) mm from the lateral margin of the orbit; its pear-shaped opening distance was 13.67(±2.17) mm. On the left side, the distance of the FIO to the lower margin of the orbit was 6.52(±1.82) mm; to the upper margin was 39.9(±2.62) mm and to the lateral and medial margin were 17.93(±2.58) mm... |
| Tipo: Journal article |
Palavras-chave: Infraorbital foramen (E2-Sibai Point); Acupuncture; Biometry. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300036 |
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| Haider,Syed Javed; Rezigalla,Assad Ali; Abdalla,Asim Mohammed. |
| Anatomical variations in the shape and dimension of the dorsum sellae and posterior clinoid process are common. Most textbooks describe its shape as a median rectangular plate, a square plate, or a transverse ledge on a slope behind the sella turcica (hypophyseal fossa). This work aims to study the dorsum sellae of human skull. One hundred and twenty five dried adult human skulls, irrespective of age, were used for the study. Detailed features of the dorsum sellae were noted and classified into five types: crest like, thin plate, frail quadrilateral plate, heavy square plate, thick elongated plate. Fusion of the posterior and middle clinoid processes in one (unilateral) and all the clinoid processes (anterior, middle, and posterior) in three skulls... |
| Tipo: Journal article |
Palavras-chave: Dorsum sellae; Clinoid process; Anatomical variations; Skull. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400001 |
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| Manikum,C; Rennie,C; Naidu,E. C. S; Azu,O. O. |
| The suprascapular notch (SSN) is important, as it is a risk factor in the development of suprascapular nerve entrapment syndrome. The purpose of this study is to describe the morphology of the SSN of a sample of normal scapulae in the Discipline of Clinical Anatomy, University of KwaZulu Natal. Sixty scapulae were used consisting of 37 males and 23 females (mean age 51 years). The superior transverse diameter and maximal depth of the notches were measured. Comparisons were made of the notch in relation to the maximal width and length of the scapulae, laterality and sex. The Rengachary classification method was adopted to describe the shape of the SSN. Analysis of morphological variations showed Type II- wide blunted V-shaped notch to be predominant (65%).... |
| Tipo: Journal article |
Palavras-chave: Suprascapular notch; Morphology; Clinical anatomy; Nerve entrapment. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400029 |
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| Villarreal-Silva,Eliud Enrique; Hinojosa Amaya,José Miguel; Bazaldua Cruz,Juan José; Martínez Fernández,David; Elizondo-Omaña,Rodrigo Enrique; Guzmán López,Santos. |
| Extraocular muscles are important references in strabismus surgery and in placement of intraorbital devices. We analyzed extraocular muscles morphometry and possible anatomical variances of 20 orbits. We report the length, width, and points of insertion of the extraocular muscles. No anatomical variations in length, width and points of insertion were found. With regard to the rectus muscles, it was found that the superior rectus and lateral rectus are the longest muscles and that the width difference between the superior and inferior rectus is greater than that between the medial and lateral rectus and that the point of insertion of the rectus muscles has a variable morphology. The superior oblique muscle was smaller in caliber than the inferior oblique,... |
| Tipo: Journal article |
Palavras-chave: Extraocular muscles; Morphometry; Orbits. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100049 |
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| Zhu,Lei; Shi,XiaoDong; Wang,JunJie; Chen,JianGang. |
| The present study was carried out on a number of 16 skulls of adult male domestic donkeys. Craniometric measurements for 40 different parts of the skulls were made. All investigated features were expressed as Mean±SD. Cephalic indices and ratios were calculated by using the investigated features. The craniometric measurements and cephalic indices had been compared with those of local horses and ponies. A skull length of 443.07±53.57 mm and a maximum zygomatic width of 169.09±17.64 mm were obtained. The size of donkey skull was between those of local horses and ponies. A skull index of 38.23±0.85, a cranial index of 45.01±2.83 and a facial index of 67.80±3.79 were obtained. Cranial index and skull index were found to be close in value to that of local... |
| Tipo: Journal article |
Palavras-chave: Skull; Donkey; Craniometry. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400030 |
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| de la Vega,R; Díaz,G; da Fonseca,A.H. |
| Multivariate statistical methods are relatively new tools for data analysis. They have a lot of applications in biological researches: nevertheless, for several reasons, they have not been widely employed in this subject yet. Recently, present authors published a paper applying multivariate statistics on non-parasitic phase of Anocentor nitens. In the present article Boophilus microplus has received a very similar statistic treatment. In this paper, the influence of different incubation conditions was studied in groups of 12-15 individuals in each of the 24 combinations of six temperatures 24, 27, 30, 32, 34 and 36ºC and four relative humidity values, 100, 80, 75.5 and 70% over the cycle variables of B. microplus. According to the results, the best... |
| Tipo: Journal article |
Palavras-chave: Ticks; Ixodidae; Boophilus microplus; Multivariate Analysis; Non-parasitic phase. |
| Ano: 2010 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2010000200004 |
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| Victoriano,Pedro F; Coronado,Tanía M; Ortiz,Juan Carlos. |
| The gemís Diplolaemus Bell, 1843 is a common squamate component of the Patagonian región of South América. Considerable taxonomic confusión exists within this gemís, particularly about the status of Chilean-Andean populations and the actual distribution of D. leopardinas (Werner, 1898). In an attempt to clarify the taxonomic status and distribution of Diplolaemus species, we performed a principal component analysis (PCA) and discriminant function analysis (DFA) using both standard morphometric and meristic data. Multivariate summaries of morphometric data show that most species are poorly discriminated, with the exception of D. darwinii. In contrast, a PCA analyses performed on the meristic data clearly distinguish three discrete groups: 1. D. darwinii, 2.... |
| Tipo: Journal article |
Palavras-chave: Species limits; Taxonomy; Patagonia; Polychrotidae. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000100006 |
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| de la Vega,R; Díaz,G. |
| Multivariate statistical methods are useful tools complementary to classic univariate methods. In biology, they are used in several scenarios where data structure, classification and grouping are necessary. Nevertheless, it seems they have not been employed in the study of non-parasitic phase of ticks or any other arthropod. In this paper, the influence of different incubation conditions was studied in groups of 12-15 individuals in each of the 24 combinations of six temperatures 24, 26, 28, 30, 32, and 34ºC and four relative humidities 100, 80, 75.5 and 70% over the cycle variables of Anocentor nitens looking for establishing the most suitable environmental conditions to increase or decrease ticks performance and to apply these knowledges to zoogeography.... |
| Tipo: Journal article |
Palavras-chave: Ticks; Ixodidae; Multivariate Analysis; Non-parasitic phase. |
| Ano: 2008 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2008000200002 |
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| Firdaus-Raih,Mohd; Senafi,Sahidan; Munir Murad,Abdul; Marzuki Sidik,Nik; Kiew Lian,Wan; Daud,Fauzi; Zainal Ariffin,Shahrul Hisham; Zamrod,Zulkeflie; Chon Seng,Tan; Sofiman Othman,Ahmad; Azni Harmin,Sharr; Radzuan Saad,Mohd Yusof; Mohamed,Rahmah. |
| Biotechnology education in developing nations remains one of the rate limiting factors in achieving optimal human resource capacity to drive and tap the bio-resources of these nations. Many developing countries are situated within rich bio-diversity enclaves. Biotechnology offers the promise of tapping these bio resources towards due process of developing these nations. While there may be a steady stream of biology and biotechnology based graduates, from Malaysian as well as foreign universities contributing to the human resource base for these countries, the numbers and knowledge diversity produced, still lack the capacity to optimally power research and development as well as supply the industrial biotechnology sectors of these countries. Realizing the... |
| Tipo: Journal article |
Palavras-chave: Biotechnology awareness; Biotechnology education; Capacity building. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000100004 |
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| Registros recuperados: 9.178 | |
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