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| Registros recuperados: 9.178 | |
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| Moyano,Hugo I.. |
| Se describe la historia de los descubrimientos briozoológicos hechos en la Antártica durante el siglo que va entre la publicación de los resultados de la Expedición Antártica Belga (1904) y la realización de la 13ª conferencia de la International Bryozoology Association habida en Concepción, Chile, en enero de 2004 (Moyano et al. 2003). Los países participantes en los descubrimientos incluyen a Bélgica, Francia, Alemania, Australia, Suecia, Rusia, UK, USA, Nueva Zelanda, España, China, Italia, Argentina y Chile lo que se ha traducido en la descripción de 6 familias nuevas 41 géneros nuevos y no menos de 315 especies nuevas. Sin embargo, como algunas de las especies nuevas son subantárticas, y otras tanto antárticas como subantárticas el número real de... |
| Tipo: Journal article |
Palavras-chave: Historia de la ciencia; Antártica; Bryozoa. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382005000100014 |
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| CAMUS,PATRICIO A. |
| El año 2013 marcará el cierre de una etapa importante para la Revista Chilena de Historia Natural (RCHN), ya que a partir de 2014 comenzará a publicarse a través de la plataforma SpringerOpen, incluyendo algunos cambios relevantes en su diseño, manejo editorial, e idioma, entre otros. Por lo tanto en este artículo sintetizo algunos aspectos clave en la evolución de RCHN desde su fundación a fines del siglo 19, a través de dos períodos históricos: (a) 1897-1963, donde destaca la figura de su creador Carlos E. Porter y el rol de la Sociedad Chilena de Historia Natural, y (b) 1983-2013, su etapa reciente ligada a la Sociedad de Biología de Chile. Adicionalmente presento un breve análisis de la situación y el impacto de RCHN en su etapa moderna, incluyendo... |
| Tipo: Journal article |
Palavras-chave: Chile; Historia natural; Impacto. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000400001 |
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| Ayala,Marlene; Lang,Gregory A. |
| Stored reserves are critical for the early spring growth of reproductive and vegetative sinks in sweet cherry (Prunus avium L.). To study the distribution of carbon storage reserves on new, highly productive hybrid rootstocks in sweet cherry, an experiment was established using 5-yr-old cv. 'Regina' on the semi-vigorous rootstock 'Gisela®6' ('GI®6'). Using whole-canopy enclosure chambers, five trees were pulse-labeled three times with high levels of 13CO2 during the fall. At leaf drop, leaves, buds, wood, bark and roots were sampled for gas chromatography-mass spectrometry (GC-MS) analysis. The storage organs with the highest percentages of excess 13C atoms were the roots and the older wood in the trunks, branches and buds. During the spring, newly... |
| Tipo: Journal article |
Palavras-chave: Fruit set; 'Gisela®' rootstock; Sink; Spring remobilization stage I; Storage reserves; Transition. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200006 |
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| Szymanowska-Powalowska,Daria. |
| Background The production of biofuels from renewable energy sources is one of the most important issues in industrial biotechnology today. The process is known to generate various by-products, for example crude glycerol, which is obtained in the making of biodiesel from rapeseed oil. Crude glycerol may be utilized in many ways, including microbial conversion to 1,3-propanediol (1,3-PD), a raw material for the synthesis of polyesters and polyurethanes. Results The paper presents results of a study on the synthesis of 1,3-propanediol from crude glycerol by a repeated batch method with the use of Clostridium butyricum DSP1. Three cycles of fermentation medium replacement were carried out. The final concentration of 1,3-PD was 62 g/L and the maximum... |
| Tipo: Journal article |
Palavras-chave: Environmental stress; Fermentation; High-performance liquid chromatography. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000600011 |
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| Qi,Zhitao; Shi,Rongwei; Li,Suyang; Zang,Xiayan; Wang,Zisheng. |
| Background: Interleukin-22 (IL-22) plays an important role in the regulation of immune responses. However, little is known about its function or structure in fish. Results: The IL-22 gene was first cloned from So-iny mullet (Liza haematocheila), one of commercially important fish species in China. Then, 3-D structure model of the mullet IL-22 was constructed by comparative modeling method using human IL-22 (1M4R) as template, and a 5 ns molecular dynamics (MD) was studied. The open reading frame (ORF) of mullet IL-22 cDNA was 555 bp, encoding 184 amino acids. The mullet IL-22 shared higher identities with the other fish IL-22 homologs and possessed a conserved IL-10 signature motif at its C-terminal. The mullet IL-22 model possessed six conserved helix... |
| Tipo: Journal article |
Palavras-chave: Comparative modeling; Interleukin-22; Liza haematocheila; Molecular dynamics. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400003 |
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| Araneda,Nadia; Parra,Marcelo; Valdivia Osorio,José; Olate,Sergio. |
| The maxillary sinus (MS) is described as a pyramid-shaped cavity of the maxilla. Knowledge of its morphology makes it possible to define normality and abnormality so that its three-dimensional analysis can be a valuable preoperative tool during surgery in this anatomical area. The aim of this study is to present a strategy of morphological analysis of the MS using 3D printing acquired through computed cone beam tomography (CBCT) images. A cross-sectional descriptive study was conducted, including 15 subjects (8 women and 7 men). The 3D virtual reconstruction and modeling was done on the MSs bilaterally, and 30 physical models were produced on a 3D printer. The results revealed that the MSs obtained exhibited various morphologies. An individual analysis of... |
| Tipo: Journal article |
Palavras-chave: Maxillary sinus; 3D printing; Biomodel. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300046 |
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| Chen,Hainan; Dong,Qirong; Jiang,Wei. |
| This study aims to observe the 3-D structural changes in subchondral bone and the effects of bisphosphonate intervention in the early unsteady stage of the knee joint. Sixty healthy male New Zealand white rabbits were divided into the model group (n= 24), the bisphosphonate (Bis) group (n= 24), and the control group (n= 12). The rabbits' right knees were used to evaluate the structural changes. The Bis group received subcutaneous injections of bisphosphonate, while the model and control groups received subcutaneous injections of isotonic saline solution. After surgical preparation, the knee joint was dissected for Micro-CT examination, and the Micro-CT results were compared using ANOVA. In the fourth postoperative week, the bone volume fraction (BVF),... |
| Tipo: Journal article |
Palavras-chave: Osteoarthritis; Subchondral bone; 3D structure; Micro-CT. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100042 |
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| Reyes-Garcia,Luis; Cuevas,Yuri; Ballesteros,Carolina; Curkovic,Tomislav; Löfstedt,Christer; Bergmann,Jan. |
| L. Reyes-Garcia, Y. Cuevas, C. Ballesteros, T. Curkovic, C. Löfstedt, and J. Bergmann. 2014. A 4-component sex pheromone of the Chilean fruit leaf roller Proeulia auraria (Lepidoptera: Tortricidae). Cien. Inv. Agr. 41(2):187-196. The Chilean fruit leaf roller Proeulia auraria is a pest of economically important fruit species. Two compounds attractive to males have been identified as (E)-11-tetradecenyl acetate (E11-14:OAc) and (E)-11-tetradecenol (E11-14:OH) and are currently being used in Chile to monitor this species. Preliminary experiments carried out by our group suggested that the 2-compound mixture might not be optimal for the attraction of males, which prompted us to reinvestigate the sex pheromone of P. auraria in the present study. The pheromone... |
| Tipo: Journal article |
Palavras-chave: Eulia; Euliini; Native species; Sex attractant; Tortricinae. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200005 |
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| Pashaei,Shahyar. |
| Plastination is a process of preservation of anatomical specimens by a delicate method of forced impregnation with curable polymers like silicone, epoxy or polyester resins with vast applications in medical fields of study. Plastination is a technique of tissue preservation developed by Dr. Gunther von Hagens in 1977. In this process, water and lipids in biological tissues are replaced by curable polymers (silicone, epoxy, polyester) which are hardened, resulting in dry, odorless and durable specimens. In this technique it is possible for us to treat every part of the body and tissues to preserve it for educational purposes. Nowadays there are new and vast varieties of applications for plastination in the educational and cultural areas. This invention has... |
| Tipo: Journal article |
Palavras-chave: Plastination; Impregnation. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400014 |
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| Lee,Youngsub; Park,Sairom; Kim,Hun; Lee,Seung Kyu; Kim,Jin Woo; Lee,Hak Kyo; Jeong,Dong Kee; Lee,Sung Jin. |
| Background: The melanocortin-4 receptor gene (MC4R) plays an important role in regulating food intake and body weight in mammals. In the present study, we identified the MC4R gene in native Korean brown, brindle, and black cattle by polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP), and investigated its association with economic traits. A total of 413 cattle from the three breeds were tested for backfat thickness, carcass weight, longissimus muscle area, and marbling score, and statistical data were analyzed using the SAS program. Results: The C allele had the highest frequency in brown and brindle cattle, and the G allele frequency was highest in black cattle. The C1069G SNP was significantly (p < 0.05) associated with only... |
| Tipo: Journal article |
Palavras-chave: Economic trait; Marbling scores; MC4R gene; PCR-RFLP; SNP. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000500014 |
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| Okamoto,Keishi; Wakebe,Tetsuaki; Saiki,Kazunobu; Manabe,Yoshitaka; Tsurumoto,Toshiyuki. |
| During dissection practice for medical students at Nagasaki University, a horizontal fissure and hypoplastic middle lobe were encountered in the right lung of an 81-year-old Japanese female. In a normal right lung, the horizontal fissure is situated anterior to the oblique fissure. On the contrary, in the present case, the horizontal fissure was situated posterior to the oblique fissure. We identified a small, additional lobe on the medial surface of this lung. It was situated in the medial part of the oblique fissure, and was determined to be a small hypoplastic middle lobe. As a result of the hypoplasia of the middle lobe, the original horizontal fissure may have disappeared from the anterior surface. The horizontal fissure, in this case, may be a... |
| Tipo: Journal article |
Palavras-chave: Lung; Horizontal fissure of right lung; Hypoplastic middle lobe; Oblique fissure; Anomaly. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200043 |
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| Snoj,Ziga; Cvetko,Erika. |
| The external jugular vein is increasingly being utilized as the recipient vein in head and neck free tissue transfers, and for cannulation in order to conduct diagnostic procedures or intravenous therapies. The variations in the patterns of its course, and knowledge of them, are therefore important. We report on a unique and previously non-described unilateral fenestration and duplication of the external jugular vein found during the neck dissection of a 77-year-old female cadaver. Embryological evaluation and clinical implications of the anomaly are described. Clinicians and surgeons performing neck vascular or reconstructive surgery should be aware of this variation of the external jugular vein in the hope of preventing inadvertent injury. |
| Tipo: Journal article |
Palavras-chave: External jugular vein; Anatomical variation; Fenestration; Duplication. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100016 |
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| Registros recuperados: 9.178 | |
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