786 research outputs found
Complexation of adamantyl derivatives by a .beta.-cyclodextrin dimer
No full textThe binding constants, standard molar enthalpy, Gibbs free energy, and entropy changes were determined for the formation of complexes between adamantyl derivatives and a β-cyclodextrin dimer. It is concluded that, within experimental error, the two cyclodextrin residues in the dimer behave independent to each other when complexing the adamantyl derivatives
OBREGON, Alvaro. ARTICULOS (3 of 4)
No full text"
A note which says: “Collect these with discretion”. Article with no author or date titled “The dots on the I’s”, regarding the conferences between the representatives of Presidents Obregón and Harding. Article with no author or date indicating that Gen. Alvaro Obregón is having problems with reconstructing Mexico within the limits of the budget.
/ Minuta con la anotación ""Coleccionar éstos con discreción"". Artículo sin autor ni fecha titulado ""Los puntos sobre las íes"", que trata sobre las conferencias entre los representantes de los presidentes Obregón y Harding. Artículo sin autor ni fecha que aborda el problema del Gral. Alvaro Obregón para lograr la reconstrucción de México sobre el presupuesto de ingresos.
OBREGON, Alvaro. ARTICULOS (3 of 4)
No full text"
A note which says: “Collect these with discretion”. Article with no author or date titled “The dots on the I’s”, regarding the conferences between the representatives of Presidents Obregón and Harding. Article with no author or date indicating that Gen. Alvaro Obregón is having problems with reconstructing Mexico within the limits of the budget.
/ Minuta con la anotación ""Coleccionar éstos con discreción"". Artículo sin autor ni fecha titulado ""Los puntos sobre las íes"", que trata sobre las conferencias entre los representantes de los presidentes Obregón y Harding. Artículo sin autor ni fecha que aborda el problema del Gral. Alvaro Obregón para lograr la reconstrucción de México sobre el presupuesto de ingresos.
Métricas de autor Alvaro Hernan Moreno Durán
No full textInforme de las métricas de autor del Dr. Alvaro Hernan Moreno Durán de las publicaciones indexadas en Google Académico cuyo objetivo es entregar un insumo para el fortalecimiento de las capacidades y potencialidades de los autores de la Universidad Santo Tomás en el posicionamiento y visibilidad de sus publicaciones.Report of the author metrics Alvaro Hernan Moreno Durán of the publications indexed in Google Scholar whose objective is to provide an input for the strengthening of the capacities and potentialities of the authors of the Santo Tomás University in the positioning and visibility of their publications.http://unidadinvestigacion.usta.edu.c
OBREGON, Alvaro (Gral.); CABRERA, Luis (Lic.)
No full textFile originally titled “Gen. Alvaro Obregón. File number 5. Subject: B.A. Luis Cabrera. Letter signed by Clemente Reynoso on April 29-919”. Clemente Reynoso is a pseudonym of Gen. Alvaro Obregón, used when answering a letter written by B.A. Luis Cabrera, Secretary of Finance and Public Credit. In said letter, Cabrera addresses three issues: How friends are made using an elevated position. How those friends are “political dead weight” and why the author himself did not make friends by using his position as Secretary of Finance and Public Credit. Clemente Reynoso analyzes the three points, harshly criticizing Cabrera. (This letter can also be found in series 11020700, file C-20, “CABRERA, Luis”, in the Alvaro Obregón database and in series 13010201 “Documents in a Lock Box. CABRERA, Luis; Clemente REYNOSO”, file 10/7 from this same Database). / Cédula titulada originalmente "Señor General Alvaro Obregón. Expediente número 5. Asunto: Lic. Luis Cabrera. Carta firmada por Clemente Reynoso al. Abril 29-919". Clemente Reynoso es un seudónimo del Gral. Alvaro Obregón, quien contesta una carta del Lic. Luis Cabrera, Secretario de Hacienda y Crédito Público, en la que Cabrera aborda tres asuntos: Cómo se fabrican amigos estando en un puesto elevado. Cómo esos amigos son el "lastre político" y por qué no fabricó amigos usando el puesto de Secretario de Hacienda y Crédito Público. Clemente Reynoso analiza los tres puntos criticando duramente a Cabrera. (Esta carta se encuentra también en la serie 11020700, expediente C-20, "CABRERA, Luis" del Fondo Alvaro Obregón y en la serie 13010201 "Documentos en Caja. CABRERA, Luis; Clemente REYNOSO", expediente 10/7 de este mismo Fondo)
OBREGON, Alvaro (Gral.); CABRERA, Luis (Lic.)
No full textFile originally titled “Gen. Alvaro Obregón. File number 5. Subject: B.A. Luis Cabrera. Letter signed by Clemente Reynoso on April 29-919”. Clemente Reynoso is a pseudonym of Gen. Alvaro Obregón, used when answering a letter written by B.A. Luis Cabrera, Secretary of Finance and Public Credit. In said letter, Cabrera addresses three issues: How friends are made using an elevated position. How those friends are “political dead weight” and why the author himself did not make friends by using his position as Secretary of Finance and Public Credit. Clemente Reynoso analyzes the three points, harshly criticizing Cabrera. (This letter can also be found in series 11020700, file C-20, “CABRERA, Luis”, in the Alvaro Obregón database and in series 13010201 “Documents in a Lock Box. CABRERA, Luis; Clemente REYNOSO”, file 10/7 from this same Database). / Cédula titulada originalmente "Señor General Alvaro Obregón. Expediente número 5. Asunto: Lic. Luis Cabrera. Carta firmada por Clemente Reynoso al. Abril 29-919". Clemente Reynoso es un seudónimo del Gral. Alvaro Obregón, quien contesta una carta del Lic. Luis Cabrera, Secretario de Hacienda y Crédito Público, en la que Cabrera aborda tres asuntos: Cómo se fabrican amigos estando en un puesto elevado. Cómo esos amigos son el "lastre político" y por qué no fabricó amigos usando el puesto de Secretario de Hacienda y Crédito Público. Clemente Reynoso analiza los tres puntos criticando duramente a Cabrera. (Esta carta se encuentra también en la serie 11020700, expediente C-20, "CABRERA, Luis" del Fondo Alvaro Obregón y en la serie 13010201 "Documentos en Caja. CABRERA, Luis; Clemente REYNOSO", expediente 10/7 de este mismo Fondo)
Edipo y Alvaro Mendiola: algunos paralelismos
No full textSophocles's Oedipus and Juan Goytisolo s Alvaro Mendiola have parallel roles and destinies. We have studied here their behaviour and the reasons that cause the characters to act as they do. We may conclude that the author of Oedipus wishes to render a promising ending without ugly predictions. This contrasts with Goytisolo 's as he concludes his trilogy with a negative endingLe personnage de Sophocle, Oedipe, et le personnage de Juan Goytisolo, Alvaro Mendiola ont une manière d'agir et un devenir parallèles. Ce qui est étudié ici, ce sont les causes de ces conduites et les raisons qui ont amené les personnages à agir comme ils l'ont fait. On peut conclure que l'auteur d'Oedipe veut terminer sur une note prometteuse, sans haines ni sombres augures, pendant que Juan Goytisolo conclut sa trilogie romanesque sur une fin pessimiste.El personaje de Sófocles, Edipo, y el personaje de Juan Goytisolo, Alvaro Mendiola, tienen un actuar y un devenir paralelo. Lo que aquí se estudia son esas conductas y los motivos que llevaron a los personajes a hacer lo que hicieron. Se concluye que el autor de Edipo quiere dejar un final promisorio, sin odios ni nefastos augurios, mientras que Juan Goytisolo concluye su trilogía novelesca con un final pesimista.Moreno Rodríguez Ramón. Edipo y Alvaro Mendiola: algunos paralelismos. In: Bulletin Hispanique, tome 103, n°2, 2001. pp. 695-703
Is demand for polluting goods manageable? an econometric study of car ownership and use in Mexico
No full textCharging for social marginal costs is efficient regardless of price elasticities, but the importance of getting prices"right"is greater the more manageable, or elastic, the demand. In efficient pollution control programs, options to make cars cleaner are combined optimally with demand conservation. The roles played by"cleaner cars"as compared with"fewer trips"are determined by empirical parameters: cheap, clean technologies would imply a great role for cleaner cars, while high demand elasticities lead to a greater role for demand reduction. In seminal research, evisence was found to support the hypothesis that demand for commodities such as gasoline should have lower price elasticities and higher income elasticities in developing than in industrial countries. The authors estimate a model of gasoline demand and car ownership in Mexico, using a panel of annual observations by state. Key features they introduce are instrumental variables on different data and the treatment of (1) possible dynamics, (2) measurement errors in the data, and (3) unobserved characteristics in individual states. They use tests of serial correlation in the residuals to model the dynamics properly. The resulting model is one of almost immediate adjustment, with a short-term price elasticity for gasoline close to the long-term estimate of -0.8. The model displays elasticities that are lower (for income) and higher (for price) than those hypothesized, and are within the range of elasticities found in industrial countries. Byproducts of the model: The elasticity of car purchases with respect to gasoline prices is positive. Scrappage decisions are affected by income and by car and gasoline prices. And these elasticities are not significantly different in the richer states. For policy purposes, these findings do not support"elasticity pessimism"The use of car services is sensitive to pricing, which suggests that consumers, for some of their demand, have reasonably good alternatives to car services. Consideration of external costs - such as accidents, congestion, air pollution, and road damage - thus involve considerable demand conservation.Inequality,Transport and Environment,Energy and Environment,Economic Theory&Research,Environmental Economics&Policies
Ice-like encapsulated water by two cholic acid moieties
No full textStarting from the structure of ice (in which each water molecule is surrounded by other four water molecules forming a tetrahedron with a value of 4.51 A for the edge O-O distance), and the knowledge that this value also corresponds to the O7-O12 distance of the skeleton of cholic acid, it is hypothesized that two steroid cholic acid moieties, with an appropriate steroid-steroid distance and a belly-to-belly orientation, could encapsulate a single water molecule between them. To check this hypothesis two succinyl derivatives of cholic acid (a monomer and the related head-head dimer in which the succinyl group is the linking bridge) were designed. The expected "ice-like" structure is found in the crystal of the dimer. There is a hydrogen bond synergy between those participating in the "ice-like" structure, and those in which the bridge is involved with the O7-H hydroxy group and the side chain of the steroid. (c) 2012 Elsevier Inc. All rights reserved
Supramolecular Structures Generated by a p-tert-Butylphenylamide Derivative of Deoxycholic Acid. From Planar Sheets to Tubular Structures through Helical Ribbons
No full textThe formation of supramolecular structures initiated by a p-tert-butylphenylamide derivative of deoxycholic acid (Na-t-butPhDC) is investigated. At 1.18 mM concentration of Na-t-butPhDC and 37 degrees C, initial flat ribbons are observed which sell-transform into helical ribbons (with a mean pitch angle of 47 +/- 6) which finally originate molecular tubes with an external diameter of 241 +/- 28 inn. Most of the molecular tubes show helical markings with a pitch angle value of 45 +/- 4 degrees, in full agreement with predictions of simple models based on chiral elastic properties of the membrane. A lateral association mechanism is proposed to account or the growth of the external diameter (from 225 +/- 32 to 546 +/- 59 nm) of tubes with time at 3.99 mM
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