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A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843 Gayana
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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A MULTIVATIATE ANALYSIS OF Anocentor nitens (IXODOIDEA: IXODIDAE): NON-PARASITIC PHASE/[title] [title language=es]ANÁLISIS MULTIVARIADO DE Anocentor nitens (IXODOIDEA: IXODIDAE): FASE NO PARASITARIA Rev Salud Anim.
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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A nationwide biotechnology outreach and awareness program for Malaysian high schools Electron. J. Biotechnol.
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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A neutral cue facilitates detection of a visual target by modulating attention Biol. Res.
HAMAME,CARLOS M; DELANO,PAÚL H; ROBLES,LUIS.
Twelve rats were trained to perform a two-choice visual detection task in which a right or left light was presented and the animáis were required to press the lever located under the illuminated light for a food reward. In seventy percent of the triáis the target light was preceded by presentation of a neutral cue (a central light). Relevance of the neutral cue for detection of the target was analyzed by comparing behavioral Índices of attention in its presence and absence. Accuracy was significantly higher in presence than in absence of the neutral cue, while mean response latencies were lower in presence than in absence of the neutral cue. These results indicate that the animáis allocated attentional resources on the target detection during a high...
Tipo: Journal article Palavras-chave: Alerting effect; Attention; Detection task; Expectancy; Neutral cue; Rat.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400012
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A new approach to chemical modification protocols of Aspergillus niger and sorption of lead ion by fungal species Electron. J. Biotechnol.
Rafiu Awofolu,Omotayo; Okechukwu Okonkwo,Jonathan; Roux-Van Der Merwe,Renate; Badenhorst,Jackie; Jordaan,Erika.
Biomasses of five fungi species (Aspergillus niger, Penicillium austurianum, Saccharomyces cerevisiae, Mucor arcindloides and Trichoderma reesi were evaluated for their uptake of lead ion from aqueous solution using batch systems. Both dead and live fungal biomasses were comparatively studied for their adsorption efficiencies. The effect of pH as one of the primary factors that influences sorption efficiency of metal ions in solution was also studied. Modification of the fungal biomass with the least sorption capacity was carried out using a four-step procedure. Three different modifying agents under the optimised experimental conditions were used. The percentage uptake of lead ion by fungi species ranged from: Aspergillus niger: 6.71-64.95% and...
Tipo: Journal article Palavras-chave: Aspergillus niger; Fungi species; Lead ion; Modification; Sorption.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400001
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A new geographic record of the endangered Darwin's fox Lycalopex fulvipes (Carnivora: Canidae): filling the distributional gap RChHN
D'ELÍA,GUILLERMO; ORTLOFF,ALEXANDER; SÁNCHEZ,PAMELA; GUIÑEZ,BASILIO; VARAS,VALERIA.
Tipo: Journal article
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000400010
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A NEW INVASIVE FRESHWATER FISH SPECIES IN CENTRAL CHILE: JENYNSIA MULTIDENTATA (JENYNS, 1842) (CYPRINODONTIFORMES: ANABLEPIDAE) Gayana
Quezada-Romegialli,Claudio; Vila,Irma; Véliz,David.
Se reporta la presencia de la especie Jenynsia multidentata en Chile central, avistada en agosto de 2008 en la localidad de Peñaflor. Durante 2009 se registra en la confluencia del estero Puangue y el río Maipo, extendiendo su distribución a un amplio sector de este estero. Jenynsia multidentata corresponde a la 26ª especie íctica introducida al país.
Tipo: Journal article
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000200007
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A new low molecular mass alkaline cyclodextrin glucanotransferase from Amphibacillus sp. NRC-WN isolated from an Egyptian soda lake Electron. J. Biotechnol.
Al-Sharawi,Samar Z.R.; Ibrahim,Abdelnasser S.S.; El-Shatoury,Einas H; Gebreel,Hassan M; Eldiwany,Ahmad.
Background: Cyclodextrin glucanotransferase (CGTase) is one of the most industrially important enzymes used in the commercial production of cyclodextrins (CDs). Alkaliphilic bacteria have attracted much interest in the last few decades because of their ability to produce extracellular enzymes that are active and stable at high pH values. Here, we report the isolation of a new CGTase from alkaliphilic bacteria collected from Egyptian soda lakes and describe the purification and biochemical characterization of this CGTase. Results: Screening for CGTase-producing alkaliphilic bacteria from sediment and water samples collected from Egyptian soda lakes located in the Wadi Natrun valley resulted in the isolation of a potent CGTase-producing alkaliphilic...
Tipo: Journal article Palavras-chave: Amphibacillus sp; Cyclodextrin glycosyltransferase; Cyclodextrins; Wadi Natrun soda lakes.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600003
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A new method: measurement of microleakage volume using human, dog and bovine permanent teeth Electron. J. Biotechnol.
Yavuz,Izzet; Aydin,Haluk; Ulku,Refik; Kaya,Sadullah; Tumen,Caner.
This study investigates the feasibility of a different new approach to determining the microleakage volume associated with dental restorations (Class V cavity restorated with glass ionomer cement + high copper amalgam) and the relative marginal adaptation deficiency of dog, bovine and human permanent teeth in in vitro conditions. Also researched is the appropriateness of using dog and bovine teeth in in vitro studies rather than human teeth. Our method utilizes the molecular adsorption characteristics of methylene blue. Within the framework of this study, 60 permanent teeth (20 human, 20 dogs and 20 bovine) were used. These groups were evaluated statistically, of which indicated no statistically significant differences (p > 0.05). It was also concluded...
Tipo: Journal article Palavras-chave: Dye adsorption test; Microleakage; Tooth.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000100003
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A new Morphological Classification of the Anterior Inferior Iliac Spine: Relevance in Subspine Hip Impingement International Journal of Morphology
Morales-Avalos,Rodolfo; Leyva-Villegas,Jorge I; Sánchez-Mejorada,Gabriela; Méndez-Aguirre,Omar; Galindo-Aguilar,Oscar Ulises; Quiroga-Garza,Alejandro; Villarreal-Silva,Eliud E; Vílchez-Cavazos,Félix; Galván,José R.B; Elizondo-Omaña,Rodrigo E; Guzmán-López,Santos.
Femoroacetabular impingement syndrome (FAI) is a clinical entity that has been recognized in recent years as a frequent cause of pain and the early development of hip arthrosis. Subspine hip impingement is characterized by the prominent or abnormal morphology of the anteroinferior iliac spine (AIIS), which contributes to the development of a clinical picture that is similar to FAI. The aims of this study were to propose a new morphological classification of the AIIS, to determine the prevalence of the different AIIS morphologies based on this classification and to correlate the presence of said morphologies with different gender and age groups. The sample consisted of 458 hemipelvises from individuals of known age and sex (264 men and 194 women). Each...
Tipo: Journal article Palavras-chave: Prevalence; Anterior inferior iliac spine; Subspine impingement; Classification; Morphology; Hip.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200034
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A NEW NAME IN SECTION ANDINIUM W. BECKER OF THE GENUS VIOLA L. (VIOLACEAE) Gayana Botánica
Watson,John M.; Flores,R..
Tipo: Journal article
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000200009
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A NEW NORTHERN LIMIT FOR THE DISTRIBUTION OF RANUNCULUS SPEGAZZINII LOURTEIG (RANUNCULACEAE) IN CHILE Gayana Botánica
Lehnebach,Carlos A; Rivero,Magaly; Ezcurra,Cecilia; Lockhart,Peter J.
Se informa la colecta de Ranunculus spegazzinii Lourteig en la IX Región de Chile (38°S). Este nuevo registro extiende el límite norte de distribución de esta especie en Chile en c. 1400 km. Además se presenta un mapa con los puntos de colecta de R. spegazzinii e imágenes del nectario y aquenio obtenidas en el microscopio electrónico de barrido
Tipo: Journal article
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432007000200009
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A new population of Darwin's fox (Lycalopex fulvipes) in the Valdivian Coastal Range RChHN
Farias,Ariel A; Sepúlveda,Maximiliano A; Silva-Rodríguez,Eduardo A; Eguren,Antonieta; González,Danilo; Jordán,Natalia I; Ovando,Erwin; Stowhas,Paulina; Svensson,Gabriella L.
Tipo: Journal article
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100003
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A NEW POPULATION OF THE HOODED ANTPITTA (Grallaricula cucullata: Grallaridae) FOR THE COLOMBIAN CENTRAL ANDES Acta biol.Colomb.
MARÍN-GÓMEZ,Oscar Humberto; POLANCO,Juliana Marcela; ARANGO GIRALDO,Daniel; OSPINA DUQUE,Albert.
We report a new population of the Hooded Anpitta (Grallariculla cucullata) in the Central Andes of Colombia, a threatened bird species inhabiting montane cloud forests in Colombian and Venezuelan Andes. We present capture-rate data, which suggest the occurrence of a resident with the highest population size reported for this bird species.
Tipo: Journal article Palavras-chave: Colombian Andes; Grallaricula; Quindío; Threatened species.
Ano: 2015 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100025
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A New Quantitative Method for Predicting Forensic Racial Identity Based on Dental Morphological Trait Analysis International Journal of Morphology
Alsoleihat,Firas.
Few previous studies have demonstrated the likelihood of using the worldwide patterns of dental morphological variation in prediction of ancestry in the context of forensic dental anthropology. This paper introduces a new quantitative method for predicting forensic racial identity of individual specimens based on dental morphological trait analysis. In this study, the inter-population variation in the expression frequency of 16 non-metric tooth crown traits, manifested on the permanent dentition, was used for analysis. The method was developed from the notion that dental morphological characteristics, when viewed as sets of traits rather than isolated variables, can be utilized to calculate the relative probability that an individual belongs to a...
Tipo: Journal article Palavras-chave: Forensic dental anthropology; Non-metric tooth crown traits; Racial identification.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200009
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A NEW RECORD OF A SOCIAL SPIDER, ANELOSIMUS LORENZO FOWLER AND LEVI, 1979 (ARANEAE, THERIDIIDAE), FROM A TEMPERATE ZONE (URUGUAY) Gayana
Viera,Carmen; García,Luis F.
Se registra Anelosimus lorenzo para Uruguay, constituyendo el hallazgo más austral de la especie. El presente registro confirma la inusual presencia de una araña social para una zona de clima templado. Con este nuevo reporte, el número de especies de Anelosimus conocidas para este país se eleva a tres.
Tipo: Journal article
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000200008
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A new record of Equus (Mammalia: Equidae) from the Late Pleistocene of central-south Chile RChHN
RECABARREN,OMAR P; PINO,MARIO; CID,INÉS.
Fourteen dental and bone parts of a horse excavated from the Pilauco paleontological site, Osorno (40°39' S-73°07' W) are analysed and interpreted. This site was formed in association with a peat bog located on the banks of the old Damas River and has conserved abundant late Pleistocene mammalian fauna and flora materials. A date of 11457 ± 140 14C yrs B.P. was obtained from a molar and agrees with our stratigraphic age model. We have identified the fossils as pertaining to the species Equus (Amerhippus) andium, which confirms its presence in central-south Chile. Furthermore, the recorded geographic location indicate that the metapodial adaptations of the specimens previously described agree with the reconstructed late Pleistocene landscape of Pilauco,...
Tipo: Journal article Palavras-chave: Equus; Equus (Amerhippus) andium; Late Pleistocene; Pilauco.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400006
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A NEW SPECIES OF SAND EEL GENUS BASCANICHTHYS (ANGUILLIFORMES: OPHICHTHIDAE) FROM THE CARIBBEAN Boletín de Investigaciones
Moreno,Fabián; Acero P,Arturo; Grijalba-Bendeck,Marcela.
A new species of the sand eel genus Bascanichthys (Anguilliformes: Ophichthidae) is described from specimens found inside the stomachs of mature female numbfish Narcine bancroftii. These rays were collected as bycatch in local fisheries, using beach seines in shallow waters (5 to 10 m) in Gaira Bay (Santa Marta, Colombian Caribbean). Bascanichthys gaira n.sp., is described from three specimens and can be distinguished from other species of the genus by its minute pectoral-fin base (12.324.7% of gill-opening length) and its vertebral number (189).
Tipo: Journal article Palavras-chave: Endemic sand eel; Anguilliformes; Ophichthidae; Colombia; Southern Caribbean.
Ano: 2016 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612016000100001
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A new species of Telmatobufo (Schmidt 1852) (Anura, Calyptocephalellidae) from a remnant of the Maulino Forest, central Chile Gayana
Cuevas,César C.
A new species, Telmatobufo ignotus, from the Reserva Nacional Los Queules, Cauquenes Province, central Chile is described herein. The new taxon is hypothesized based on a new combination of adult, larval, and chromosomal characters. The new species present the more septentrional distribution on the coastal range and a very restrictive distribution area compared to its congeners; because of this, taxonomic and conservation comments are discussed and advanced.
Tipo: Journal article Palavras-chave: New species; Anura; Telmatobufo; Morphology; Chromosomes; Central Chile.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000200004
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A New Statistical Method for Comparative Anatomy International Journal of Morphology
Aversi-Ferreira,Tales Alexandre.
Rules, formulas and statistical tests have been widely used in studies that use continuous variables in the normal or Gaussian distribution or other tests whose data fit this type of distribution (t and z distributions) and whose parameters can be defined. However, there are cases in which the model and goal of the scientific work allow only the use of discrete or nominal variables. The absence or presence of a structure or organ (muscles, nerves, blood vessels, bones, and ligaments), characteristics associated with these organs, such as the source of nerves, vessels and muscles and the distribution of nerves and vessels are discrete and / or nominal variables that do not fit the Gaussian distribution, nor of z or t, unless the measures of these structures...
Tipo: Journal article Palavras-chave: Morphology; Comparative anatomy; Statistical method.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400016
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