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Las colecciónes biológicas, para qué?
Gustavo Darrigran
Boletín Biológica , 2012,
Abstract:
STANDARDIZATION OF VESTIBULAR EVOKED MYOGENIC POTENTIALS
Ufuk Derinsu,Elmira ？sgenderova Ba？,Ferda Akda？
Marmara Medical Journal , 2009,
Abstract: Objectives: The purpose of this study is to determine the normative data for vestibular-evoked myogenic potentials (VEMP ) to use in differential diagnosis.Materials and Methods: We recorded vestibular-evoked myogenic potentials in 32 voluntaries (16 men and 16 women). Electrodes were placed as 1-channel montage: active electrode to the midpoint of the ipsilateral Sternocleidomastoid muscle (SCM), referance electrode to the lower part of the ipsilateral SCM and ground electrode to the forehead. 1000 Hz tone burst stimulus was used.Results: There was no significant difference between male and female subjects and, no significant interaural difference for P13-N23 latency values. P13-N23 latency and amplitude values were determined at 105 dB, 100 dB, 95 dB, 90 dB and 85 dB nHL. The mean VEMP threshold was 91,875 dB nHL.Conclusion: Standard deviation was small for P13-N23 latency values, whereas was large for amplitüte values. It was accepted that the latency values could be used for differential diagnosis.
Binge drinking among university students
Iana Edith da Ponte Feij？o,Helena Alves de Carvalho Sampaio,Maria Olganê Dantas Sabry,Antonio Augusto Ferreira Carioca
Revista Brasileira em Promo？？o da Saúde , 2012,
Abstract: Objective: To investigate the consumption of alcoholic beverages by college students, with an emphasis on practicing alcoholic binge. Methods: We selected randomly 102 students enrolled in different courses at a public university located in the city of Fortaleza. Alcohol consumption and socioeconomic data were investigated with a form. We evaluated both alcohol abuse by transforming the intake in grams of ethanol, such as the presence of alcoholic binge. The statistical package SPSS version 16.0 was used as an operational tool for data analysis, adopting p <0.05 significance level. Results: From the students assessed, 52 (51%) were male and 50 (49%) were female with a mean age of 21.9 ± 1.9 years. The prevalence of alcohol consumption was 29.4% (n = 30). The binge was observed in 64.7% (n = 11) of men and 46.2% (n = 6) women. The average ethanol intake on each occasion of consumption was 125.4 ± 92g for men and 61.5 ± 42.3 g of ethanol among women, with statistical difference (p = 0.008). Conclusions: The prevalence of alcohol consumption was low, although the binge has been high, especially among men, putting the group at risk to health, demanding the realization of educational activities.
Microstructure, Mechanical properties and Damping behaviour of hybrid composite of A356.0
SHADAKSHARI R,VINAYAK JANIWARAD,M.H. ANNAIAH,DR.MAHESHA K
International Journal of Innovative Research in Science, Engineering and Technology , 2013,
Abstract: In this study, A356.0 alloys were reinforced with varied percentage of Alumina and Graphite by liquid metallurgy route and tested for Microstructure, Mechanical properties and Damping behaviour. Microstructure revealed uniform distribution of reinforcement in the matrix resulting in improved Mechanical properties and Damping behaviourcompared to un-reinforced material. The ceramic reinforced alloys were found to have improvement in Mechanical properties and Damping behaviour which may be attributed to the uniform distribution and bonding of reinforcement in the matrix.
Teachers think differently: Method effects on the evaluation of high intellectual ability students’ socio–emotional intelligence
Daniel Hernández,María Dolores Prieto,Rosario Bermejo,María Carmen Fernández
Revista Electronica Interuniversitaria de Formación del Profesorado , 2011,
Abstract: This paper investigates the relationship between 566 students’, their parents’ and their teachers’ perceptions on the socio–emotional competence of such sample of learners with high intellectual abilities. The results indicated that parents’ and their children’s self-perceptions were positively related, the relationship being moderately statistically significant in all socio–emotional intelligence aspects. However, the relationship between teachers’ ratings and parents’ and students’ ratings was positively statistically significant at a low level. Using a multitrait–multimethod analysis (Campbell and Fiske, 1959), the authors demonstrated strong method effects, especially in the case of teachers, indicating that ratings from different sources provide different and complementary information on the socio–emotional skills of high intellectual ability students.
Dabigatran, a direct thrombin inhibitor, in atrial fibrillation: Is it already time for a change in oral anticoagulation therapy?
Osmar Antonio Centurion
Journal of Atrial Fibrillation , 2010, DOI: 10.4022/jafib.v1i10.559
Abstract: Atrial fibrillation (AF) is a common arrhythmia, and its prevalence increases with aging and the severity of heart disease. AF affects more than 2 million people in the US, and more than 4 million in Europe. It is expected that the age adjusted prevalence in US will excede 10 million people by the year 2050 .In the last decade, we were able to see the light shed by several trials that dealt with AF mechanisms and the appropriate management of AF patients. Clinical studies have focused mainly on the electrophysiological properties of the substrate in the atrial muscle during sinus rhythm and on the atrial electrical responses elicited by premature timulation method . However, many undamental aspects of this arrhythmia have been poorly understood until quite recently, and there are several features on the mechanisms of AF that makes it difficult to manage it properly. Increasing awareness of AF as a disease with possible fatal complications rather than as an acceptable alternative to sinus rhythm has led to search for clear arguments to support a certain strategy as a golden standard.
Performance evaluation of H.264 decoder on different processors
H.S.Prasantha,Dr.Shashidhara.H.L,,Dr.K.N.B.Murthy,M.Venkatesh
International Journal on Computer Science and Engineering , 2010,
Abstract: H.264/AVC (Advanced Video Coding) is the newest video coding standard of the moving video coding experts group. The decoder is standardized by imposing restrictions on the bit stream and syntax, and defining the process of decoding syntax elements such that every decoder conforming to the standard will produce similar output when encoded bit stream is provided as input. It uses state of art coding tools and provides enhanced coding efficiency for a wide range of applications, including video telephony, real-time video conferencing, direct-broadcast TV (television), blue-ray disc, DVB (Digital video broadcast) broadcast, streaming video and others. The paper proposes to port the H.264/AVC decoder on the various processors such as TI DSP (Digital signal processor), ARM (Advanced risk machines) and P4 (Pentium processors). The paper also proposesto analyze and compare Video Quality Metrics for different encoded video sequences. The paper proposes to investigate the decoder performance on different processors with and without deblocking filter and compare the performance based on different video quality measures.
Parent Siblings Oriented Tree Quorum Protocol
Anurag Singh,,Ashish Kumar Rai,,Anup Kumar Jayswal,Meenu
International Journal on Computer Science and Engineering , 2011,
Abstract: In this paper, we are proposing a new replica control algorithm Parent Siblings Oriented Tree Quorum Protocol (PSTQ) for the management of replicated data in distributed database system. Thisalgorithm imposes a logical structure of tree on the set of copies of an object. The proposed protocol provides a small read quorum as well as a small write quorum while guaranteeing fault-tolerance of write operations. With this algorithm read operation is executed by reading one copy in failure-free environment. In case of failure of sites, number of data copies required for read operation increases but remains constant for subsequent failure of the sites. The less number of data copies required for write operation provide low write operation cost and high write availability.
Synthesis, photophysical properties of novel fluorescent metal complexes from 3-(1,3-benzoxazol-2-yl)naphthalen-2-ol, and their antimicrobial activities
Kiran R. Phatangare,Amol B. Patil,Vikas S. Patil,Vikas S. Padalkar
Current Chemistry Letters , 2012,
Abstract: A series of novel metal complexes containing metal atoms such as Zn, Co, Cu, Cd, Ni, Mg and Sn have been synthesized from 3-(1,3-benzoxazol-2-yl)naphthalen-2-ol. The synthesized ligand was well characterized by IR, 1H-NMR and mass spectrometry. The electrochemical properties were studied by cyclic voltammetric analysis. The synthesized complexes are fluorescent and absorb in the range of 317 to 323 nm while emit in the range of 371 to 416 nm with good quantum yield. All metal complexes show significant in vitro antibacterial activity against E. coli and S. aureus strains and in vitro antifungal activity against C. albicans and A. niger strains by using serial dilution method. The antibacterial activities were expressed as the minimum inhibitory concentration (MIC) in μg/mL.
Avalia o do jundiá (Rhamdia quelen) em diferentes sistemas de cultivo para a regi o do litoral centro norte de Santa Catarina, Brazil
Hilton Amaral Junior,Daniel Ribeiro de Almeida,Fernanda Queiróz e Silva,Silvano Garcia
REDVET , 2008,
Abstract: El bagre (Rhamdia quelen), un pez nativo habitante de la mayoría de los ríos, lagos y lagunas de Santa Catarina, y que pertenecen a la orden Siluriformes, familia Pimelodidae, género Rhandia. El estudio tiene como objetivo evaluar el desempe o de este pez nativo en los sistemas más utilizados en Santa Catarina. El experimento se llevó a cabo en el ámbito del Campo Experimental de Piscicultura de Camboriú CEPC-EPAGRI, cuando 11 tanques excavados fueron utilizados, tres en representación de un monocultivo de bagre con una densidad de 1,5 p/m2, tres en representación de un bicultivo de bagre y tilapia con una densidad de 3p/m2, tres en representación de un policultivo de la carpa, tilapia y "jundiás" con una densidad de 3p/m2, y en dos tanques excavados fueron instalados seis tanques redes, en representación de las culturas de alta densidad de 50 y 100 p/m3.
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