68,352 research outputs found
Effects of oligosaccharide removing procedure on the protein profiles of lupin seeds
No full textThe effects on the protein pattern of raffinose family oligosaccharides ethanol extraction from intact lupin seeds (Lupinus albus and Lupinus luteus) has not been addressed so far. In this work, 1D and 2D electrophoretic techniques were used to detect changes of the protein profiles upon oligosaccharide removal procedure. Some differences between untreated and treated samples were clearly visible in 1D electrophoresis, where the decrease of some polypeptides was revealed. In addition, a dark zone at the top of each treated sample lane became visible, suggesting the formation of large-sized protein aggregates as a result of the extraction procedure. By using the greater resolution of 2D electrophoresis, the identification of some varying spots was made possible: In particular the bands corresponding to conglutin γ were significantly reduced in the processed samples. The leakage of this protein by ethanol treatment of the seeds was qualitatively and quantitatively confirmed with specific antibodies by Western and dot blotting techniques, respectively. Another polypeptide around 100 kDa undergoing decrease upon treatment was tentatively identified as lupin lipoxygenase, according to literature data and direct lipoxygenase activity measurements on treated and untreated seed extracts. The observed decrease of lipoxygenase activity in the processed seeds was 37%. These results show that the extraction of α-galactosides, while maintaining the overall pattern of lupin storage proteins, led to the reduction of some critical proteins. In particular, conglutin γ and lipoxygenase decrease could be desirable in view of their potential allergenicity and effects on the flour organoleptic characteristics, respectively
Internal structure of Beck Hopelessness Scale: An analysis of method effects using the CT-C(M–1) model
No full textThe construct validity in relation to the dimensionality or factor structure of the Beck Hopelessness Scale (BHS) has long been debated in psychometrics. Irrelevant variance due to item wording (method effects) can distort the factor structure, and recent studies have examined the method factor?s role in the factor structure of the BHS. However, the models used to control the method effects have severe limitations, and new models are needed. One such model is the correlated trait-correlated method minus one (CT-C(M-1)), which is a powerful approach that gives the trait factor an unambiguous meaning and prevents the anomalous results associated with fully symmetrical bifactor modeling. The present work compares the fit and factor structure of the CT-C(M-1) model to bifactor models proposed in previous literature and evaluates the criterion validity of the CT-C(M-1) model and its discriminatory capacity by taking suicidal ideation as the criterion variable. This study used a large and heterogeneous open mode online sample of Argentinian people (N = 2,164). The results indicated that the CT-C(M-1) model with positive words as referenced items achieves the most adequate factor structure. The factorial scores derived from this model demonstrate good predictive and discriminating capabilities.Fil: Flores Kanter, Pablo Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Empresarial Siglo XXI. Vicerrectorado de Innovación e Investigación. Instituto de Organizaciones Saludables; ArgentinaFil: Toro, Ronald. Universidad Católica de Colombia; ColombiaFil: Alvarado Valverde, Jesús. Universidad Complutense de Madrid; Españ
Minerals’ criticality and countries' mining competitiveness: Two faces of the same coin
No full textThis article introduces a novel theoretical and empirical framework for estimating the criticality of key minerals that are intensively used in the energy transition and the mining competitiveness of countries producing them, using economic complexity techniques. The theoretical framework proposes that the most competitive countries are those exporting a broad range of mineral goods, including the most critical ones. Meanwhile, the most critical minerals are the least ubiquitous and are exported by the most competitive countries. The empirical framework relies on an endogenous system of equations in which countries’ mining competitiveness and mineral criticality are simultaneously co-determined. The equation system is solved using the Fitness-Criticality algorithm (FCa), an adaptation of the Economic Fitness-Complexity algorithm. The results show that South Africa, Russia, the United States, and China are the most competitive mining countries. Meanwhile, the platinum group metals, silicon, rare earths, and lithium are the most critical minerals. These results are consistent with other methodologies employed by different experts that separately estimate both dimensions and derive rankings of countries and minerals, but are obtained with a methodology that offers substantial advantages
Semblanza. Profesor Dr.Cs. Mariano E. Valverde Medel (1921-2006)
No full textEl 3 de noviembre del 2006, falleció en La Habana el doctor Mariano E. Valverde Medel, eminente urólogo cubano formador de generaciones de médicos y especialistas en Urología en el país. Nació en Los Palacios, provincia Pinar del Río, el 28 de mayo de 1921, miembro de una prestigiosa familia de médicos. Su padre, el doctor Armando M. Valverde Masino, ejerció por más de cuatro décadas en Los Palacios; su hermano, el doctor Armando C. Valverde Medel, ejerció como médico laboratorista en Artemisa y su tío segundo, el doctor Luis F. Ajamil Valverde, fue notable profesor de Enfermedades de las Vías Urinarias en la Universidad de La Habana durante tres décadas. Cursó el doctor Mariano Valverde su enseñanza primaria en colegio de su pueblo natal y en el de los Padres Escolapios de La Habana. Se graduó de Bachiller en Letras y Ciencias en el Instituto de Segunda Enseñanza de Pinar del Río (1940). Los estudios superiores los realizó en la Facultad de Medicina de la Universidad de La Habana, donde alcanzó el título de Doctor en Medicina (1948) con la tesis “Litiasis del uréter”, que mereció la calificación de sobresaliente y la recomendación de su publicación
Carta de Emeterio Valverde Téllez sobre pago subscripción de Ábside
No full textCorrespondencia Gabriel Méndez Plancarte ; C. : 19</p
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
Carta de Emeterio Valverde Téllez sobre pago de revista Ábside
No full textCorrespondencia Gabriel Méndez Plancarte ; I. - C. : jul. 3.</p
Process integration of Calcium-Looping thermochemical energy storage system in concentrating solar power plants
No full textThe Calcium-Looping process is a promising thermochemical energy storage method based on the multicycle calcination-carbonation of CaCO3-CaO to be used in concentrated solar power plants. When solar energy is available, the CaCO3 solids are calcined at high temperature to produce CaO and CO2, which are stored for subsequent utilization. When power is needed, these reaction by-products are fed into a carbonator reactor where energy is released from the exothermic carbonation reaction. In comparison with currently commercial energy storage systems, such as solar salts, the Calcium-Looping process presents several benefits such as the feasibility to work at significantly higher power cycle temperatures, a higher energy storage density and the possibility to store energy in the medium-long term. The present manuscript analyzes a number of novel Calcium-Looping configurations for energy storage combined with CO2 cycles in a solar tower plant. The high overall efficiencies achieved (32–44%, defined as the ratio of net electric power production to net solar thermal power entering the calciner) indicate a potential interest for the integration of the Calcium-Looping process in Concentrating Solar Power Plants, although major technological challenges related to the design of the solar receiver and of the high temperature solids handling devices remain to be faced
Carta de Emeterio Valverde Téllez sobre pago de Ábside
No full textCorrespondencia Gabriel Méndez Plancarte ; C. : 18 ; Marca de agua: Silver Bond</p
Off-design model of concentrating solar power plant with thermochemical energy storage based on calcium-looping
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