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Larval development, stages and an international comparison of husbandry parameters of the Vietnamese Mossy Frog Theloderma corticale (Boulenger, 1903) (Anura: Rhacophoridae)
A. Rauhaus,A. Gawor,R.G.B. Perl,S. Scheld
Asian Journal of Conservation Biology , 2012,
Abstract: We describe the larval development and stages of the locally threatened Vietnamese Mossy Frog Theloderma corticale, which is endemic to northern Vietnam. Diagnostic morphological characters are provided for Gosner (1960) larval stages 1-46. This is to our knowledge the first larval staging for the rhacophorid anuran genus Theloderma in general. As guideline for further breeding engagement with Theloderma representatives in an international scale, based on the species T. corticale as husbandry analogue, we further oppose larval development, captive reproduction and husbandry management both achieved under tropical conditions at the Amphibian breeding station of the Institute of Ecology and Biological Resources in Hanoi (Vietnam), and in Europe, at the amphibian breeding unit at Cologne Zoo (Germany). Observed ovipositions at Cologne Zoo took place from March to September and were initiated after increase of temperatures and humidity (increased spraying) subsequent to a hibernation phase in combination with raised water levels. The developmental time observed for T. corticale at 20°C was about 4.5 months. For providing a recent captive management overview, we furthermore compare our husbandry experiences and data on the reproductive biology of T. corticale with data from the literature.
Assessment of left atrial appendage function by transesophageal echocardiography in patients two weeks after acute coronary syndromes
Grzegorz Piotrowski,Zenon Gawor,Dariusz Timler,Jozef Tazbir,
Grzegorz Piotrowski
,Zenon Gawor,Dariusz Timler,Jozef Tazbir

老年心脏病学杂志(英文版) , 2005,
Abstract: For many years in ischemic heart disease, ventricles rather than atria received attention so not much is known about left atrial function in left ventricular ischemia. Objective Our study aimed to evaluate left atrial appendage (LAA)function by means of biplane transesophageal echocardiography in patients ten days after acute coronary syndromes (ACS).Methods The study was performed on 16 adult patients (65.9±9.9 years old) in whom transesophageal echocardiography was done 10 days after ACS. The following left atrial appendage (LAA) planimetric parameters were analyzed: LAA transversal dimension, LAA longitudinal dimension,LAA maximal area, and LAA minimal area. LAA ejection fraction was calculated and analyzed. The following LAA Doppler parameters were analyzed: the peak LAA emptying and the peak LAA filling velocities.The control group consisted of 14 patients (43±14.6 years old) without cardiovascular diseases. Results Both LAA longitudinal dimension and LAA transversal dimension were significantly higher in patients with ACS than in control patients. The same was observed for LAA maximal area. Also LAA ejection fraction was higher in patients with ACS. LAA minimal area did not differ in the patients in either group. LAA peak emptying flow (LAAE) and LAA peak filling flow (LAAF) were significantly higher in patients of the study group than of the control group. Conclusion Our study shows that two weeks after acute coronary syndrome LAA as a reservoir as well as a pump works at a higher level than it does in the control group.
Struny rzekome w lewej komorze a uk ad bod coprzewodz cy serca
Zenon Gawor,Rados?aw Drobiński,Ryszard Wlaz?owski,Aleksander Goch
Polish Journal of Cardiology , 1999,
Abstract: Celem przeprowadzonych badań by a ocena uk adu bod coprzewodz cego serca u pacjentów ze strunami rzekomymi w lewej komorze serca. Do badań zakwalifikowano 42 pacjentów (24 kobiety i 18 m czyzn), rednia wieku wynosi a 32,5±;10,8 r., u których w trakcie badania echokardiograficznego stwierdzono struny rzekome w lewej komorze serca, jako jedyn nieprawid owo w uk adzie sercowo-naczyniowym (grupa I). Do grupy porównawczej (grupa II) zakwalifikowano 25 klinicznie zdrowych osób (12 kobiet i 13 m czyzn), rednia wieku wynosi a 30,9±;8,2 r. (p>0,05), u których nie stwierdzono tej anomalii. U wszystkich pacjentów wykonano nast pnie 24-godzinn rejestracj EKG metod Holtera, badanie elektrofizjologiczne metod stymulacji przezprze ykowej lewego przedsionka oraz rejestracj u rednionego sygna u komorowego. Komorowe zaburzenia rytmu (nale ce najcz ciej do I i II klasy wg klasyfikacji Lowna i Wolfa) cz ciej wyst powa y u osób z rozpoznanymi strunami rzekomymi (52,4%) ni u osób w grupie porównawczej (24%). Spo ród ocenianych parametrów stymulacji przezprze ykowej lewego przedsionka obserwowano jedynie nieznacznie d u szy czas powrotu rytmu zatokowego w grupie porównawczej. U pacjentów z echokardiograficznie rozpoznanymi strunami rzekomymi stwierdzono znamiennie cz stsze wyst powanie pó nych potencja ów komorowych (grupa I – 33,3%, grupa II – 8%).
Security for Grid Services
Von Welch,Frank Siebenlist,Ian Foster,John Bresnahan,Karl Czajkowski,Jarek Gawor,Carl Kesselman,Sam Meder,Laura Pearlman,Steven Tuecke
Computer Science , 2003,
Abstract: Grid computing is concerned with the sharing and coordinated use of diverse resources in distributed "virtual organizations." The dynamic and multi-institutional nature of these environments introduces challenging security issues that demand new technical approaches. In particular, one must deal with diverse local mechanisms, support dynamic creation of services, and enable dynamic creation of trust domains. We describe how these issues are addressed in two generations of the Globus Toolkit. First, we review the Globus Toolkit version 2 (GT2) approach; then, we describe new approaches developed to support the Globus Toolkit version 3 (GT3) implementation of the Open Grid Services Architecture, an initiative that is recasting Grid concepts within a service oriented framework based on Web services. GT3's security implementation uses Web services security mechanisms for credential exchange and other purposes, and introduces a tight least-privilege model that avoids the need for any privileged network service.
A Comparative Investigation of Lead Sulfate and Lead Oxide Sulfate Study of Morphology and Thermal Decomposition  [PDF]
S. A. A. Sajadi
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.22024
Abstract: The compound lead oxide sulfate PbSO4.PbO was prepared in our laboratory. The Thermal behavior of PbSO4 was studied using techniques of Thermogravimetry under air atmosphere from 25 to 1200°C. The identity of both compounds was confirmed by XRD technique. Results obtained using both techniques support same decomposition stages for this compound. The electron microscopic investigations are made by SEM and TEM. The compound is characterized by XRD and the purity was determined by analytical Methods. Also a series of thermogravimetric analysis is made and the ideal condition is determined to convert this compound to pure lead oxide.
Metal ion-binding properties of L-glutamic acid and L-aspartic acid, a comparative investigation  [PDF]
S. A. A. Sajadi
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.22013
Abstract: A comparative research has been developed for acidity and stability constants of M(Glu)1, M(Asp)2 and M(Ttr)3 complexes, which have been determined by potentiometric pH titration. Depending on metal ion-binding properties, vital differences in building complex were observed. The present study indicates that in M(Ttr) com-plexes, metal ions are arranged to the carboxyl groups, but in M(Glu) and M(Asp), some metal ions are able to build chelate over amine groups. The results mentioned-above demonstrate that for some M(Glu) and M(Asp) complexes, the stability constants are also largely determined by the affinity of metal ions for amine group. This leads to a kind of selectivity of metal ions, and transfers them through building complexes accompanied with glutamate and aspartate. For heavy metal ions, this building complex helps the absorption and filtration of the blood plasma, and consequently, the excursion of heavy metal ions takes place. This is an important method in micro-dialysis. In this study the different as-pects of stabilization of metal ion complexes regarding to Irving-Williams sequence have been investigated.
Determining the Basaltic Sequence Using Seismic Reflection and Resistivity Methods  [PDF]
A. Alanezi, A. Qadrouh
Open Journal of Geology (OJG) , 2013, DOI: 10.4236/ojg.2013.32B004
Abstract:

This study was carried out in Harat Rahat (south of Almadinah Almonwarah) using seismic reflection and resistivity methods. The main objectives of this study are to determine the extent of the basaltic layer and to define the subsurface faults and fractures that could affect and control the groundwater movement in the study area. A 2D seismic profile was acquired and the result shows that the subsurface in the study area has a major fault. We obtained a well match when the seismic result was compared with drilled wells. As a complementary tool, the resistivity method was applied in order to detect the groundwater level. The results of the resistivity method showed that six distinct layers have been identified. The interpretation of these six layers show that the first three layers, the fourth layer, the fifth layer and the bottom of the section indicated various subsurface structures and lithologies; various basaltic layers, fractured basalt, weathered basement and fresh basaltic layers, respectively. It is obvious that the eventual success of geophysical surveys depend on the combination with other subsurface data sources in order to produce accurate maps.

Equilibria and Stability in Glycine, Tartrate and Tryptophan Complexes, Investigation on Interactions in Cu(II) Binary and Ternary Systems in Aqueous Solution  [PDF]
S. A. A. Sajadi
Open Journal of Inorganic Non-metallic Materials (OJINM) , 2014, DOI: 10.4236/ojinm.2014.41001
Abstract:

The acidity and stability constants of M(Gly)1, M(Ttr)1, and M(Trp)1 M: Cu2+, Cu(Bpy2)2+, and Cu(Phen3)2+ complexes, were determined by potentiometric pH titration. It is shown that the stability of the binary Cu(L), (L: Gly, Ttr, and Trp) complex is determined by the basicity of the carboxylate group on one side and amino group on the other side. It is demonstrated that the equilibrium, Cu(Ha4)2+ + Cu(L) \"\"Cu(Har)(L) + Cu2+, is displacement due to the well known experience that mixed ligand complexes formed by a divalent 3d ion, a heteroaromatic N base and an O donor ligand possess increased stability. The stability constants of the 1:1 complexes formed between Cu2+, Cu(Bpy)2+ or Cu(Phen)2+

Adaptive Fuzzy Sliding Mode Controller for Grid Interface Ocean Wave Energy Conversion  [PDF]
Adel A. A. Elgammal
Journal of Intelligent Learning Systems and Applications (JILSA) , 2014, DOI: 10.4236/jilsa.2014.62006
Abstract:

This paper presents a closed-loop vector control structure based on adaptive Fuzzy Logic Sliding Mode Controller (FL-SMC) for a grid-connected Wave Energy Conversion System (WECS) driven Self-Excited Induction Generator (SEIG). The aim of the developed control method is to automatically tune and optimize the scaling factors and the membership functions of the Fuzzy Logic Controllers (FLC) using Multi-Objective Genetic Algorithms (MOGA) and Multi-Objective Particle Swarm Optimization (MOPSO). Two Pulse Width Modulated voltage source PWM converters with a carrier-based Sinusoidal PWM modulation for both Generator- and Grid-side converters have been connected back to back between the generator terminals and utility grid via common DC link. The indirect vector control scheme is implemented to maintain balance between generated power and power supplied to the grid and maintain the terminal voltage of the generator and the DC bus voltage constant for variable rotor speed and load. Simulation study has been carried out using the MATLAB/Simulink environment to verify the robustness of the power electronics converters and the effectiveness of proposed control method under steady state and transient conditions and also machine parameters mismatches. The proposed control scheme has improved the voltage regulation and the transient performance of the wave energy scheme over a wide range of operating conditions.

Geochemical Characteristics and Chemical Electron Microprobe U-Pb-Th Dating of Pitchblende Mineralization from Gabal Gattar Younger Granite, North Eastern Desert, Egypt  [PDF]
Hassan A. A. Shahin
Open Journal of Geology (OJG) , 2014, DOI: 10.4236/ojg.2014.41003
Abstract:

Pitchblende mineralization was studied in the younger granite samples collected from Gabal Gattar, north Eastern Desert, Egypt using electron scanning microscope (ESM) and electron probe microanalyses (EPMA). This study revealed that this pitchblende contains significant Zr content reaching up to (66.80% ZrO2), which suggests that volcanic rocks were probably the source of such a deposit. High level emplaced high-K Calc-alkaline plutons as Qattar granite may have been associated with their volcanic equivalent emplaced in the surrounding area or now eroded. Lead content of the pitchblende mineralization is high and with moderate volcanics (up to 7.71% PbO). In contrast, it is low in ThO2, Y2O3 and REE2O3. High Zr and Pb content associated with pitchblende mineralization from Gattar granite indicates

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